JP4939244B2 - Winding connection device for rotating machine, stator for rotating machine and rotating machine - Google Patents

Description

  The present invention relates to a winding connection technique for connecting a stator winding wound around a stator core of a rotating machine such as an electric motor.

In a rotating machine, for example, an electric motor, a winding connecting device that connects U-phase, V-phase, and W-phase stator windings wound around a stator core is used. As a method for connecting three-phase (U-phase, V-phase, W-phase) stator windings, a star connection method or a delta connection method is known, but a star connection method in which a circulating current does not flow is used. Many. As a winding connection device that connects the U-phase, V-phase, and W-phase stator windings in a star connection and is connected to the outside, for example, a winding connection device described in Patent Document 1 is known. In the winding connection device described in Patent Document 1, a U-phase connection bracket, a V-phase connection bracket, and a W-phase connection bracket that are necessary for star connection of U-phase, V-phase, and W-phase stator windings. The neutral point fittings are formed in arc shapes having different radii. Each connection fitting is accommodated (concentrically) in an accommodation case formed of insulating resin so that the arc-shaped centers of the connection fittings coincide with each other.
JP 2005-130667 A

In the conventional winding connection device for star connection of the stator windings of each phase, the U-phase connection fitting, the V-phase connection fitting, the W-phase connection fitting, and the neutral point connection fitting have different radii. It has a circular arc shape. For this reason, the outer diameter of the housing case, and thus the outer diameter of the motor, can accommodate U-phase connection fittings, V-phase connection fittings, W-phase connection fittings, and neutral point connection fittings arranged in the radial direction. It is necessary to set more than the length.
By the way, an electric motor or the like used for an electric power steering mounted on an automobile has a limited installation space. For this reason, downsizing of electric motors used for such applications is strongly demanded.
However, the conventional winding connection device for star-connecting the stator windings of each phase has a limit in reducing the size of the motor.
The present invention was created in view of these points, and an object of the present invention is to provide a winding connection technique capable of star-connecting the stator windings of each phase while reducing the size of the electric motor. To do.

The first aspect of the present invention is a winding connection device for a rotating machine that connects the first to third phase stator windings wound around the stator core of the stator of the rotating machine with a star connection and to the outside. is there. The winding connection device for a rotary machine of the present invention is preferably used for an electric motor. The first-phase to third-phase stator windings typically correspond to U-phase to W-phase stator windings.
The winding connecting device for a rotary machine of the present invention includes a connecting member and a holding member that holds the connecting member. The holding member is provided on one side in the axial direction of the stator core. The axial direction of the rotor core is a direction that coincides with the axial direction of the rotation axis of the rotor in a state where the rotor is rotatably attached to the stator. The connecting member is composed of first to fourth conductive members. As the conductive member, a bus bar formed of a conductive metal plate is preferably used.
The first conductive member is provided in the main body, the first winding connection terminal connected to the end of the first-phase stator winding, and the first external connected to the outside. It has a connection terminal. The second conductive member is provided in the main body, the second main body, the second winding connection terminal connected to one end of the second phase stator winding, and the second connected to the outside. External connection terminals. The third conductive member is provided on the main body, the third main body, the third winding connection terminal connected to one end of the third-phase stator winding, and the third connected to the outside. External connection terminals. The fourth conductive member has a main body portion and a fourth winding connection terminal provided on the main body portion and connected to the other end of each of the first to third phase stator windings. ing. Typically, the first to third conductive members connect one end of the U-phase to W-phase stator winding to the outside, and the fourth conductive member fixes the U-phase to W-phase. The other ends of the child windings are connected in common (star connection). The stator winding of each phase can be configured by one partial stator winding, or by connecting multiple partial stator windings in series connection, parallel connection, or a combination of series connection and parallel connection. You can also The connecting member may be one in which the stator windings of each phase are subjected to multiple star connection (for example, double star connection or triple star connection).
In the present invention, in the state where the first to fourth conductive members are held by the holding member, as viewed from the direction perpendicular to the axial direction of the holding member, among the main body portions of the first to fourth conductive members, The other body parts except at least one body part are arranged along arcs having different radii, and at least one body part is arranged along one arc of the arcs having different radii and the other arc. And arranged across the one arc and the other arc. Typically, of the first to fourth conductive member main body portions, the three conductive member main body portions are arranged along arcs having different radii, and the remaining one conductive member main body portion is: Along one arc and another arc of arcs having different radii, the arcs are arranged across the one arc and the other arc. The axial direction of the holding member is a direction that coincides with the axial direction of the rotor core in a state where the holding member is disposed on the stator core.
“Along one arc of arcs having different radii” includes an aspect “along an arc having a radius substantially equal to the radius of one arc of arcs having different radii”. Is done. Further, in the aspect of “along another arc of arcs having different radii”, “along the arc having a radius substantially equal to the radius of the other arc of arcs having different radii” Embodiment "is included. That is, in the present invention, the main body portions of the first to fourth conductive members are arranged in three layers (including substantially three layers) in the radial direction perpendicular to the axial direction of the holding member. Examples of the “mode in which the main body portion of the conductive member is arranged along one of the different radii” include, for example, “of the inner or outer side or the central portion in the radial direction of the main body portion of the conductive member of the different radii. A mode of “arrangement along one radius” is used.
As an aspect for holding the conductive member on the holding member, typically, an aspect in which the conductive member is accommodated in the accommodating portion provided in the holding member is used. It can also be used.
The first to fourth conductive members may be composed of one member or a plurality of members.
In the present invention, the holding member holds the first to third conductive members, and the nut is placed at a location facing the first to third external connection terminals of the first to third conductive members. Is arranged. The holding member is integrally formed of resin together with the nut.
In the present invention, the first to fourth conductive members for star-connecting the first to third-phase stator windings and connecting them to the outside are provided with three layers in the radial direction perpendicular to the axial direction of the holding member ( (Including approximately three layers). Thereby, the coil | winding connection apparatus for rotary machines, the stator for rotary machines, and also a rotary machine can be reduced in size. Moreover, it can suppress that the length of the axial direction of a holding member becomes long with the member for connecting the external connection terminal of a 1st-3rd electrically-conductive member to an external terminal.

A second invention of the present invention is a winding connecting device for a rotating machine having the configuration described in claim 2.
In the present invention, the holding member is formed with a plurality of accommodating portions for accommodating the main body portions of the first to fourth conductive members. A groove is typically used as the housing portion that houses the main body portion of the conductive member. In the present invention, the plurality of accommodating portions provided in the holding member are viewed along a direction perpendicular to the axial direction of the holding member, and the other accommodating portions excluding at least one accommodating portion are along arcs having different radii. The at least one receiving portion is formed along one arc of the arcs having different radii and the other arc, and is formed across the one arc and the other arc. Yes. Typically, among the plurality of accommodating portions, the accommodating portion in which the main body portions of the three conductive members are accommodated is formed along arcs having different radii, and the remaining one conductive member main body portion is accommodated. The accommodating portion is formed along one arc and another arc of arcs having different radii, and is formed across the one arc and the other arc.
And at least 1 main-body part among the main-body parts of the 1st-4th electrically-conductive member is formed so that accommodation in at least 1 accommodating part is carried out, and other main-body parts except at least 1 main-body part are at least 1 It is formed so that it can be accommodated in other accommodating parts except for one accommodating part. At least one of the main body portions of the first to fourth conductive members is accommodated in a location formed along one arc of arcs having different radii of at least one accommodating portion. A portion accommodated in a portion formed along one other arc, and a portion accommodated in a location formed across the one arc and another arc. It is preferable.
The plurality of housings and the shapes of the first to fourth conductive members are appropriately set so as to be arranged in three layers (including substantially three layers) in the radial direction perpendicular to the axial direction of the holding member.
In the present invention, since the holding member having the accommodating portion and the first to fourth conductive members can be formed separately, the holding member and the first to fourth conductive members can be easily formed.

A third invention of the present invention is a winding connecting device for a rotating machine having the configuration described in claim 3.
In this invention, the positioning member which positions the main-body part of a 1st-4th electrically-conductive member in a some accommodating part is provided. The configuration, arrangement position, number, and the like of the positioning member can be selected as appropriate.
In this invention, the main-body part of an electrically-conductive member can be easily arrange | positioned in the predetermined position of the accommodating part of a holding member.

According to a fourth aspect of the present invention, there is provided a winding connecting device for a rotating machine having the structure described in claim 4.
In the present invention, the positioning member is constituted by a positioning projection and a positioning recess in which the positioning projection can be engaged. The positioning protrusion is provided on one of the main body and the plurality of accommodating portions of the first to fourth conductive members, and the positioning recess is provided on the other. The positions of the positioning protrusions and the positioning recesses can be selected as appropriate, but the bottom of the groove forming the housing and the portion of the main body of the conductive member corresponding to the bottom of the groove (conductive member) It is preferably formed on the bottom of the main body.
In the present invention, since the positioning member is constituted by the positioning protrusion and the positioning recess, the body portion of the conductive member can be easily arranged at an appropriate position of the housing portion with a simple configuration.

According to a fifth aspect of the present invention, there is provided a winding connecting device for a rotating machine having the configuration described in claim 5.
In the present invention, one end of the first-phase to third-phase stator windings or the other end of the first to fourth conductive members held by the holding member is provided on the holding member. A guide portion for guiding to the fourth winding connection terminal is provided. The guide portion is formed so that the opening interval gradually decreases from the outer side to the inner side in the radial direction perpendicular to the axial direction of the holding member when viewed from the direction perpendicular to the axial direction of the holding member (V-shaped). ) The outer opening and the outer opening are connected to the outer opening, extend along the radial direction perpendicular to the radial direction of the holding member at the same (including substantially the same) opening interval, and are formed in a shape in which the inner side is closed ( It has an inner opening (U-shaped). The “inner closed shape” may be any shape in which one end or the other end of the stator winding is locked.
The outer opening can be formed by a tapered inner wall, a curved inner wall, a stepped inner wall, or the like. The inner opening can be formed by a linear inner wall and a curved or linear end wall.
In the present invention, the ends of the first to third phase stator windings are positioned at the positions of the first to fourth winding connection terminals of the first to fourth conductive members (preferably, the winding connection terminals). To the first to fourth winding connection terminals of the first to fourth conductive members and the end portions of the first to third phase stator windings. Work becomes easy.

A sixth aspect of the present invention is a winding connecting device for a rotating machine having the configuration described in claim 6.
In the present invention, the holding member includes a cylindrical main body portion that holds the main body portions of the first to fourth conductive members, and a flange portion that extends from the main body portion to the outside in the radial direction perpendicular to the axial direction of the holding member. It is configured.
The first to fourth winding connection terminals of the first to fourth conductive members are in a state in which the main body portion of the first to fourth conductive members is held by the main body portion of the holding member. The first to third phase stator windings extend from the portion to the outside in the radial direction perpendicular to the axial direction of the holding member, and at the distal end portion in the radial direction perpendicular to the axial direction of the holding member. A recess is formed into which one end or the other end can be inserted.
And the guide part is provided in the location corresponding to the recessed part currently formed in the 1st-4th coil | winding connection terminal of the 1st-4th electrically-conductive member in the collar part of a holding member.
In this invention, the operation | work which connects the edge part of the stator winding | coil of a 1st phase-a 3rd phase to the coil | winding connection terminal of a 1st-4th electrically-conductive member becomes easier.

A seventh aspect of the present invention is a winding connecting device for a rotating machine having the configuration described in claim 7.
In the present invention, the holding member is provided with a reinforcing member at a location where the inner opening constituting the guide portion is provided. For example, the holding member has a cylindrical main body and a flange extending radially outward from the main body, the guide is provided on the flange, and the inner opening of the guide is When formed from a straight inner wall extending at the same opening interval and a curved or straight end wall when viewed from the direction perpendicular to the axial direction, the inner wall and end wall of the inner opening are used as holding members. A wall-shaped rib formed so as to extend along the axial direction of the holding member from the collar portion is used. The ribs are preferably formed continuously along the inner wall and the end wall, but can also be formed discretely. The region where the reinforcing member is disposed can be set as appropriate.
When the guide member is provided on the holding member, the strength of the holding member may be reduced. For example, when the guide portion is provided on the collar portion of the holding member, the thickness of the collar portion is thin, so that the strength of the collar portion may be weakened. In this invention, the reinforcement member is provided in the location in which the inner side opening part of the guide part is provided. Thereby, the strength of the holding member can be ensured. Further, when the reinforcing member is formed so as to extend along the inner wall and the end wall forming the inner opening of the guide portion and extend along the axial direction of the holding member from the flange portion, the reinforcing member is fixed to the stator winding. It acts as a guide portion (guide groove) when connecting the end portion of the wire to the connection portion of the winding connection portion terminal (for example, a recess formed in the tip portion) by welding or the like. Thereby, the operation | work which connects a stator winding | coil to a coil | winding connection terminal becomes still easier.

The eighth invention of the present invention is
A first phase stator winding, a second phase stator winding, and a third phase stator winding provided on a stator core of the stator are star-connected, and the first phase stator winding A wire, a connection member for connecting the second-phase stator winding and the third-phase stator winding to the outside, and one side in the axial direction of the stator core, and holding the connection member A winding connection device for a rotating machine comprising a holding member,
The connection member is composed of a first conductive member, a second conductive member, a third conductive member, and a fourth conductive member,
The first conductive member is connected to a main body, a first winding connection terminal provided on the main body and connected to one end of the first-phase stator winding and the outside. Having a first external connection terminal;
The second conductive member is provided on the main body and the main body, and is connected to the second winding connection terminal connected to one end of the second-phase stator winding and the outside. A second external connection terminal;
The third conductive member is connected to the main body, a third winding connection terminal provided on the main body, connected to one end of the third-phase stator winding, and the outside. A third external connection terminal;
The fourth conductive member is provided in the main body and the main body, and each of the first-phase stator winding, the second-phase stator winding, and the third-phase stator winding A fourth winding connection terminal connected to the other end;
The holding member has a cylindrical shape that holds the main body portion of the first conductive member, the main body portion of the second conductive member, the main body portion of the third conductive member, and the main body portion of the fourth conductive member. It is composed of a main body part and a collar part extending radially outward from the main body part,
When the first conductive member, the second conductive member, the third conductive member, and the fourth conductive member are held by the main body of the holding member, they are perpendicular to the axial direction of the holding member. When viewed from any direction, at least one of the main body portion of the first conductive member, the main body portion of the second conductive member, the main body portion of the third conductive member, and the main body portion of the fourth conductive member. The main body portions excluding one main body portion are arranged along arcs having different radii, and the at least one main body portion is along one arc of the arcs having different radii and another arc. And arranged across the one arc and the other arc,
The first winding connection terminal of the first conductive member, the second winding connection terminal of the second conductive member, the third winding connection terminal of the third conductive member, and the fourth conductivity The fourth winding connection terminal of the member extends radially outward from the main body of the holding member, and the first-phase stator winding and the second phase at the radially outer tip portion. A recess into which one end or the other end of the stator winding of the third phase and the stator winding of the third phase can be inserted is formed.
One end or the other end of the first-phase stator winding, the second-phase stator winding, and the third-phase stator winding is disposed on the flange portion of the holding member, The first winding connection terminal of the first conductive member, the second winding connection terminal of the second conductive member, and the third of the third conductive member held by the main body of the holding member A guide portion and a reinforcing member are provided for guiding the winding connection terminal and the concave portion of the fourth winding connection terminal of the fourth conductive member;
The guide portion has an outer opening formed so that the opening interval gradually decreases from the outer side in the radial direction perpendicular to the axial direction of the holding member toward the inner side when viewed from the direction perpendicular to the axial direction of the holding member And an inner opening that is connected to the outer opening, extends at the same opening interval along a radial direction perpendicular to the axial direction of the holding member, and is formed in a shape in which the inner side is closed. ,
The reinforcing member is a winding connection for a rotating machine, wherein the reinforcing member is provided at an inner opening portion of the guide portion.
In the present invention, the end portions of the first to third phase stator windings can be guided to the connection positions of the first to fourth winding connection terminals of the first to fourth conductive members. Connection work between the end portions of the first to third phase stator windings and the first to fourth winding connection terminals of the first to fourth conductive members is facilitated. Moreover, the intensity | strength of the collar part in which a guide part is provided can be ensured.

A ninth aspect of the present invention is a stator for a rotating machine having the configuration described in claim 9.
The stator for a rotating machine according to the present invention is preferably used as a stator for an electric motor.
In the present invention, the above-described winding connection device for a rotating machine is used as a winding connection device that connects the first to third stator windings provided in the stator core in a star connection and the outside. Thereby, a stator and a rotary machine can be reduced in size.

A tenth aspect of the present invention is a stator for a rotating machine having the configuration described in claim 10.
In the present invention, the stator core is composed of a plurality of divided cores. The first to third phase stator windings are continuously wound around at least two divided cores arranged adjacent to each other. The aspect that “the stator winding is continuously wound around at least two split cores arranged adjacently” is “the stator winding is arranged adjacently without being cut halfway. Is wound around at least two split cores ”.
In the present invention, since the stator winding is continuously wound around the plurality of divided cores, parts and work for connecting the stator winding can be omitted.

An eleventh aspect of the present invention is a stator for a rotating machine having the configuration described in claim 11.
In this invention, the movement control member which controls the movement to the axial direction and circumferential direction with respect to the stator core of the holding member is provided. Thereby, a holding member can be firmly attached to a stator core.

A twelfth aspect of the present invention is a stator for a rotating machine as set forth in the twelfth aspect.
In the present invention, the stator core is provided with an insulating member at a portion where the first to third phase stator windings are wound. As the insulating member, an insulating member formed of a resin having insulating characteristics is preferably used. For example, when the stator core is composed of a plurality of split cores and the stator winding is wound around each split core (including the case where the partial stator winding is wound), the stator winding of each split core is An insulating member formed of a resin having an insulating property is provided at a portion to be wound.
Then, the movement restricting member is provided with a claw portion provided on one of the insulating member and the holding member provided on the stator core and the claw portion provided on the other, and the claw portion provided on one side moves in the axial direction and the circumferential direction. The engagement portion is configured to be engageable in a restricted state. As the engaging portion, for example, concave portions having wall portions on both sides in the axial direction and both sides in the circumferential direction are used.
Thereby, the movement of the holding member can be restricted with a simple configuration.

A thirteenth aspect of the present invention is a rotating machine having the configuration described in claim 13.
By using the present invention, a small rotating machine can be obtained.

  If it uses the coil | winding connection apparatus for rotary machines of Claims 1-8, the stator for rotary machines of Claims 9-12, and the rotary machine of Claim 13, it will be wound by the stator core. The radial direction of the holding member that holds the first to fourth conductive members for connecting the first to third phase stator windings in a star connection and the outside (direction perpendicular to the axial direction of the holding member) Can be shortened and the rotating machine can be miniaturized.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the first embodiment, the winding connecting device according to the present invention includes a rotor having a permanent magnet disposed on an outer peripheral surface of a rotor core, and a stator having a stator core around which a stator winding is wound. It is used for an electric motor (referred to as a “surface magnet type electric motor”).
The electric motor according to the present embodiment is used for an electric power steering mounted on an automobile. In an electric motor used for electric power steering or the like, a stator core having a split core structure is used in order to wind a thick electric wire for large current around the stator core.
The connection state of the stator windings of the present embodiment is shown in FIGS.
In the present embodiment, a stator core having 12 slots (slot number 1 to slot number 12) is configured by divided cores C1 to C12 around which partial stator windings L1 to L12 are wound. Partial stator windings C1 to C12 are wound around the divided cores C1 to C12. In the present embodiment, two divided cores C1 and C2, C3 and C4, C5 and C6, C7 and C8, C9 and C10, C11 and C12, and partial stator windings L1 and L2 and L3 arranged adjacent to each other And L4, L5 and L6, L7 and L8, L9 and L10, and L11 and L12 are continuously wound to constitute stator windings U1, V1, W1, U2, V2, and W2. One end of the partial stator winding L1 wound around the split core C1 (one end of the stator winding U1) is connected to the winding connection terminal x1 of the neutral bus bar 1 (conductive member). The other end of the partial stator winding L2 wound around the split core C2 (the other end of the stator winding U1) is connected to the winding connection terminal u2 of the U-phase bus bar (conductive member). Has been. The other end of the partial stator winding L1 and the other end of the partial stator winding L2 are connected. One end of the partial stator winding L3 wound around the split core C3 (one end of the stator winding V1) is connected to the winding connection terminal v2 of the V-phase bus bar (conductive member), The other end of the partial stator winding L4 wound around the split core C4 (the other end of the stator winding V1) is connected to the winding connection terminal x2 of the neutral point bus bar 1. The other end of the partial stator winding L3 and one end of the partial stator winding L4 are connected. One end of the partial stator winding L5 wound around the split core C5 (one end of the stator winding W1) is connected to the winding connection terminal x3 of the neutral point bus bar 1, and the split core The other end of the partial stator winding L6 wound around C6 (the other end of the stator winding W1) is connected to the winding connection terminal w2 of the W-phase bus bar (conductive member). The other end of the partial stator winding L5 and one end of the partial stator winding L6 are connected. One end of the partial stator winding L7 wound around the split core C7 (one end of the stator winding U2) is connected to the winding connection terminal u3 of the U-phase bus bar, and is connected to the split core C8. The other end of the wound partial stator winding L8 (one end of the stator winding U2) is connected to the winding connection terminal y1 of the neutral point bus bar 2 (conductive member). The other end of the partial stator winding L7 and one end of the partial stator winding L8 are connected. One end of the partial stator winding L9 wound around the split core C9 (one end of the stator winding V2) is connected to the winding connection terminal y2 of the neutral bus bar 2, and the split core The other end of the partial stator winding L10 wound around C10 (the other end of the stator winding V2) is connected to the winding connection terminal v3 of the V-phase bus bar. The other end of the partial stator winding L9 and one end of the partial stator winding L10 are connected. One end of the partial stator winding L11 wound around the split core C11 (one end of the stator winding W2) is connected to the winding connection terminal w3 of the W-phase bus bar, and is connected to the split core C12. The other end of the wound partial stator winding L12 (the other end of the stator winding W2) is connected to the winding connection terminal y3 of the neutral point bus bar 2. The other end of the partial stator winding L11 and one end of the partial stator winding L12 are connected.
As described above, by continuously winding the windings around the plurality of divided cores arranged adjacent to each other, it is possible to reduce the burden of the connecting member for connecting the windings and the connection work.

Thereby, in this embodiment, a stator winding of each phase (U phase, V phase, W phase) is constituted by a plurality of partial stator windings, and a double star connection is made by the stator windings of each phase. A stator winding is formed. That is, the first U-phase, V-phase, and W-phase stator windings U1, V1, and W1 and the second U-phase, V-phase, and W-phase stator windings are provided by the partial stator windings L1 to L12. U2, V2, and W2 are configured, and further, the first U-phase, V-phase, and W-phase stator windings U1, V, and W1 and the second U-phase, V-phase, and W-phase stator windings U2 , V2, and W2 constitute a stator winding that is double-star connected.
Any one of the U-phase stator windings (U1 and U2), the V-phase stator windings (V1 and V2), and the W-phase stator windings (W1 and W2) is the present invention. The other one corresponds to the “second phase stator winding” of the present invention, and the other one corresponds to the “third phase stator” of the present invention. Corresponds to “winding”.
External terminals are connected to the external connection terminal u1 of the U-phase bus bar, the external connection terminal v1 of the V-phase bus bar, and the external connection terminal w1 of the W-phase bus bar, and the U-phase, V-phase, and W-phase are fixed from an external three-phase power source. Current is supplied to the child windings U1, U2, V1, V2, W1, and W2.
In the present embodiment, the rotor is configured to have 8 poles, 10 poles, or 14 poles.
Various combinations of the number of phases of the stator winding, the number of slots of the stator core, and the number of magnetic poles of the rotor are possible. Moreover, the number of the split cores that continuously wind the partial stator winding can be set as appropriate.

The configuration and assembly method of the electric motor 10 of the present embodiment will be described with reference to FIGS.
3 is a longitudinal sectional view of the electric motor 10 of the present embodiment, and FIG. 4 is a view taken along the line IV-IV in FIG.
FIG. 5 is a plan view of the holding substrate 100 constituting the winding connection device, and FIG. 6 is a view taken along the line VI-VI in FIG. FIG. 7 shows a connecting device in which a connecting member (U-phase bus bar 200U, V-phase bus bar 200V, W-phase bus bar 200W, first neutral point bus bar 200X, second neutral point bus bar 200Y) is accommodated in the holding substrate 100. It is a figure explaining the operation | movement which comprises. 8 to 17 show a U-phase bus bar 200U, a V-phase bus bar 200V, a W-phase bus bar 200W, a first neutral point bus bar 200X, and a second neutral point bus bar 200Y which are connection members constituting the winding connection device. FIG. FIG. 18 shows a winding connection in which connecting members (U-phase bus bar 200U, V-phase bus bar 200V, W-phase bus bar 200W, first neutral point bus bar 200X, and second neutral point bus bar 200Y) are held on holding substrate 100. FIG. 19 is a plan view of the apparatus, and FIG. 19 is a view taken along line XIX-XIX in FIG.
FIG. 20 is a diagram illustrating an operation of attaching the winding connection device (FIGS. 18 and 19) to the stator core 50 around which the stator winding 70 is wound.
FIG. 21 is a perspective view of the split core 50A constituting the stator core 50, and FIG. 22 is a perspective view of the split core 50A to which an insulating member is attached.
FIG. 23 and FIG. 24 are diagrams illustrating a movement restricting member that restricts axial and circumferential movement of the winding connecting device with respect to the stator core 50.
FIG. 25 is a diagram illustrating an operation of connecting an external terminal to the stator.

The electric motor 10 is generally composed of a housing, a stator disposed inside the housing, and a rotor that is rotatably supported through a gap with the stator.
The housing has a cylindrical case 21. A bracket 22 is provided on one side of the case 21 in the axial direction, and a bracket 24 is provided on the other side. The bracket 22 is provided with a bearing 23, and the bracket 24 is provided with a bearing 25. The case 21 and the brackets 22 and 24 are made of a nonmagnetic material.
The rotor has a rotor core 31. The rotor core 31 is formed, for example, by laminating thin plate-shaped electromagnetic steel plates. The rotor core 31 is formed in a cylindrical shape. The number of permanent magnets corresponding to the number of magnetic poles is arranged on the outer peripheral surface of the rotor core 31. A rotary shaft 33 is inserted into a shaft hole provided at the center of the rotor core 31 by press fitting or the like. The rotating shaft 33 is rotatably supported by the bearings 23 and 25.
Further, in the present embodiment, a rotational position detector that detects the position of the rotor is provided in order to control the supply of current to the stator windings of each phase. In the present embodiment, a resolver is provided as a rotational position detector. The resolver includes a resolver rotating unit 28a and a resolver fixing unit 28b. The resolver rotating portion 28a is provided on the rotating shaft 33, and the resolver fixing portion 28b is provided on the bracket 22 at a location facing the resolver rotating portion 28a. The resolver fixing unit 28b is supplied with an electric current from the outside and outputs a rotation position detection signal indicating the position of the rotor to the outside. The rotational position detector is not limited to a resolver, and various known rotational position detectors can be used.

The stator includes a stator core 50, a stator winding 70 wound around the stator core 50, and a stator winding 70 (specifically, a partial stator winding or a stator winding of each phase). And a winding connection device for connecting to the outside.
The stator core 50 is formed by, for example, laminating thin plate-shaped electromagnetic steel plates. The stator core 50 is formed in a cylindrical shape. In the present embodiment, the stator core 50 is constituted by a plurality of divided cores 50A to 50L. The configuration of the split cores 50A to 50L will be described later. As shown in FIG. 4, the divided cores 50 </ b> A to 50 </ b> L are arranged side by side on the inner peripheral side of the case 21. The stator winding 70 includes a plurality of partial stator windings 70A to 70L (partial stator of FIG. 1) wound around a plurality of split cores 50A to 50L (corresponding to the split cores C1 to C12 of FIG. 1). (Corresponding to windings L1 to L12).
In this specification, the “axial direction of the stator core 50” refers to the axial direction of the rotating shaft 33 of the rotor (the left-right direction in FIG. 3) in a state where the rotor is rotatably disposed on the stator. Means the same direction.

The winding connecting device is provided on one side of the stator core 50 in the axial direction, and the stator winding 70 (each partial stator winding or each phase stator winding) is star-connected and connected to the outside. And a holding substrate 100 that holds the connection member.
The connecting member is composed of a plurality of bus bars. In order to connect the U-phase, V-phase, and W-phase stator windings in a star connection and externally, at least four bus bars are required. In the present embodiment, the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 200W, the first neutral point bus bar 200X, and the second medium are used as connection members for the double star connection of the stator windings. The sex point bus bar 200Y is used. The U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 200W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y are grooves 111U, 111V, 111W, It is accommodated in 111X and 111Y.
The grooves 111U, 111V, 111W, 111X, and 111Y correspond to “accommodating portions” of the present invention.

In the conventional winding connection device, the groove that accommodates the U-phase bus bar, the groove that accommodates the V-phase bus bar, the groove that accommodates the W-phase bus bar, and the groove that accommodates the neutral point bus bar have arc shapes having different radii. Is formed. That is, each groove is formed in the holding substrate along four arcs having different radii from the same center position. Therefore, a groove that accommodates a U-phase bus bar and a U-phase bus bar, a groove that accommodates a V-phase bus bar and a V-phase bus bar, a groove that accommodates a W-phase bus bar and a W-phase bus bar, and a neutral point bus bar and a neutral point bus bar The grooves to be formed are arranged in four layers in the radial direction of the holding substrate, and there is a limit to reducing the outer diameter size of the holding substrate, and thus the outer diameter size of the electric motor.
Here, the groove for accommodating the U-phase bus bar and the U-phase bus bar, the groove for accommodating the V-phase bus bar and the V-phase bus bar, the groove for accommodating the W-phase bus bar and the W-phase bus bar, the neutral point bus bar and the neutral point bus bar are accommodated. It is conceivable to arrange the bus bars and the grooves in three layers along the radial direction of the holding substrate by forming the two bus bars and the grooves in an arc shape having the same radius. However, in this case, two bus bars formed in an arc shape having the same radius overlap in the circumferential direction. For this reason, this method cannot be used.
In the present embodiment, a groove that accommodates at least one bus bar among a groove that accommodates a U-phase bus bar, a groove that accommodates a V-phase bus bar, a groove that accommodates a W-phase bus bar, and a groove that accommodates a neutral point bus bar. The grooves that accommodate other bus bars are formed along arcs having different radii, and the grooves that accommodate at least one bus bar are along one arc of the arcs having different radii and the other arc. In addition, a technique is used in which it is formed across the one arc and the other arc. As a result, the groove that accommodates the U-phase bus bar, the groove that accommodates the V-phase bus bar, the groove that accommodates the W-phase bus bar, and the groove that accommodates the neutral point bus bar are arranged in three layers (three rows) along the radial direction of the holding substrate. The outer diameter of the holding substrate, and thus the outer diameter of the electric motor can be reduced.

In the present embodiment, groove 111U that accommodates U-phase bus bar 200U and U-phase bus bar 200U, groove 111V that accommodates V-phase bus bar 200V and V-phase bus bar 200V, and groove 111W that accommodates W-phase bus bar 200W and W-phase bus bar 200W. Of the first neutral point bus bar 200X and the first neutral point bus bar 200X, the groove 111X, and the second neutral point bus bar 200Y and the second neutral point bus bar 200Y. Other bus bars and grooves except phase bus bar 200U and groove 111U (V phase bus bar 200V and groove 111V, W phase bus bar 200W and groove 111W, first neutral point bus bar 200X and groove 111X, second neutral point bus bar 200Y And the groove 111Y) are formed by arc-shaped portions having different radii, and the U-phase bus bar 200U and the groove 11 The first arc-shaped portion and the second arc having U have the same radius as any of the radius of the arc-shaped portion constituting the groove and the other bus bars excluding the U-phase bus bar 200U and the groove 111U. It is comprised by the connection part which connects a shape part, a 1st circular arc shape, and a 2nd circular arc shape part.
Note that the bus bar and the groove configured by the first arc-shaped portion, the second arc-shaped portion, and the connecting portion are not limited to the U-phase bus bar 200U and the groove 111U that accommodates the U-phase bus bar 200U, and other bus bars It may be a groove for accommodating another bus bar.
The U-phase bus bar 200U, the V-phase bus bar 200V, and the W-phase bus bar 200W are provided with a winding connection terminal and an external connection terminal for connecting one end of the stator winding of each phase to the outside. In the present embodiment, as shown in FIG. 7, two winding connection terminals 202u1 and 202u2, 202v1 and 202v2, 202w1 and 202w2, and one external connection terminal 204u are used for the double star connection of the stator windings. , 204v, 204w are provided. Further, the first neutral point bus bar 200X and the second neutral point bus bar 200Y are connected to the winding connection terminals 202x1 to 202x3 and 202y1 to star-connect the other end of the stator winding of each phase. 202y3 is provided. At the tip of the winding connection terminals 202u1, 202u2, 202v1, 202v2, 202w1, 202w2, 202x1 to 202x3, 202y1 to 202y3, a recess is formed into which the end of the stator winding (partial stator winding) can be inserted. Has been. The ends of the stator windings (partial stator windings) are joined to the winding connection terminals while being inserted into the recesses formed at the tip portions of the winding connection terminals provided on each bus bar. . As a joining method, for example, a welding method such as TIG welding is used.

As shown in FIG. 4, a connector 80 is attached to the outer periphery of the case 21. The connector 80 is provided with external terminals 81U, 81V, 81W. For example, a metal plate formed of a conductive material is used for the external terminals 81U, 81V, 81W. By attaching the connector 80 to the outer peripheral portion of the case 21, the external terminals 81U, 81V, 81W face the external connection terminals 204u, 204v, 204w of the U-phase bus bar 200U, the V-phase bus bar 200V, and the W-phase bus bar 200W. Placed in. The external terminals 81U, 81V, 81W and the external connection terminals 204u, 204v, 204w are connected by screws 82U, 82V, 82W.
The holding substrate 100 corresponds to the “holding member” of the present invention. Further, any one of the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 200W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y is the “first conductive member” of the present invention. The other one corresponds to the “second conductive member” of the present invention, the other one corresponds to the “third conductive member” of the present invention, and the other one corresponds to the “fourth conductive member” of the present invention. This corresponds to “conductive member”.

The configuration of the winding connection device will be described with reference to FIGS. In this specification, “the axial direction of the holding substrate 100 (holding member)” means that the holding substrate 100 is disposed at one end of the stator core 50 in the axial direction. This means the same direction as the axial direction (the front-rear direction in FIG. 5 and the left-right direction in FIG. 6).
The holding substrate 100 constituting the winding connection device will be described with reference to FIGS. The holding substrate 100 is formed of, for example, an insulating resin.
The holding substrate 100 has a cylindrical (cylindrical) main body 110 and a radial direction perpendicular to the axial direction of the holding substrate 100 (the axial direction of the main body 110) from the main body 110 (the outer peripheral direction in FIG. 5 and FIG. 6). Then, it is comprised by the collar part 150 extended in an upward direction and a downward direction. In the present embodiment, the flange 150 is formed on the side of the holding substrate 100 facing the stator core 50 in the axial direction (the right side in FIG. 6).
Inside the main body 110, as viewed from the direction perpendicular to the axial direction of the holding substrate 100, an inner peripheral surface 110 a having an arc shape and a notch surface 110 b notched from a surface along the inner peripheral surface 110 a having an arc shape. Is formed. In the present embodiment, the cut-out surface 110b is formed in two steps. The notch surface 110b is formed so as to constitute a space in which the above-described resolver (position detector) can be disposed.

In addition, the main body 110 has a connecting member constituting the winding connecting device, that is, a U-phase bus bar 200U, a V-phase, on the end surface in the axial direction of the holding substrate 100 opposite to the side facing the stator core 50. Grooves (accommodating portions) 111U, 111V, 111W, 111X, 111Y for accommodating the bus bar 200V, the W-phase bus bar 200W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y are formed.
U-phase bus bar 200U, V-phase bus bar 200V, W-phase bus bar 200W, first neutral point bus bar accommodated (held) in grooves 111U, 111V, 111W, 111X, 111Y of main body 110 (holding substrate 100) 200X and the second neutral point bus bar 200Y are shown in FIGS.
Of U-phase bus bar 200U and groove 111U, V-phase bus bar 200V and groove 111V, W-phase bus bar 200W and groove 111W, first neutral point bus bar 200X and groove 111X, second neutral point bus bar 200Y and groove 111Y, One bus bar and other bus bars and grooves excluding the groove in which the bus bar is accommodated, in this embodiment, the V-phase bus bar 200V and the groove 111V, the W-phase bus bar 200W and the groove 111W, excluding the U-phase bus bar 200U and the groove 111U, The first neutral point bus bar 200x and the groove 111X, and the second neutral point bus bar 200Y and the groove 111Y are formed in arc shapes having different radii when viewed from the direction perpendicular to the axial direction of the holding substrate 100.
For example, as shown in FIG. 5, the groove 111V is formed to have an arc-shaped portion whose inner peripheral surface has a radius of M3, and the groove 111W has an inner peripheral surface with a radius of M2 (M2> M3). ) And the groove 111X and the groove 111y are formed so as to have an arc-shaped portion having an inner peripheral surface radius M1 (MI> M2). The groove 111U has a radius equal to one of the radii of the arc-shaped portions of the grooves 111V, 111W, 111X, and 111Y, but the first arc-shaped portion 111u1 and the second arc-shaped portion 111u2 having different radii. It is formed to have a connecting portion 111u3 that connects the first arc-shaped portion 111u1 and the second arc-shaped portion 111u2. For example, as shown in FIG. 5, the groove 111U includes a first arc-shaped portion 111u1 in which the radius of the inner peripheral surface is equal to the radius M2 of the arc-shaped portion of the inner peripheral surface of the groove 111W, and the radius of the inner peripheral surface is a groove. 111X and the groove | channel 111Y are formed so that it may have the 2nd circular arc-shaped part 111u2 equal to the radius M1 of the internal peripheral surface, and the connection part 111u3.
The radii M1, M2, and M3 may be arc-shaped radii at the center of the grooves 111U, 111V, 111W, 111X, and 111Y or arc-shaped radii on the outer peripheral surface. Further, the arc shape of the grooves 111U, 111V, 111W, 111X, and 111Y includes a substantially arc shape.

  In the grooves 111U, 111V, 111W, 111X, and 111Y, a U-phase bus bar 200U, a V-phase bus bar 200V, a W-phase bus bar 200W, a first neutral point bus bar 200X, and a second neutral point bus bar 200Y are positioned. A positioning projection is formed. In the present embodiment, as shown in FIG. 5, on the bottom surface of the grooves 111U, 111V, 111W, 111X, 111Y, positioning protrusions 112u1 and 112u2, 112v1 and 112v2, 112w1 and 112w2 are positioned at positions separated in the circumferential direction. , 112x1 to 112x3, 112y1 to 112y3 are formed.

On the outer peripheral side of the main body 110 of the holding substrate 100, circular external terminal attachment portions 120U, 120V, and 120W are formed. External terminal mounting portions 120U, 120V, and 120W are externally provided on U-phase bus bar 200U in a state where U-phase bus bar 200U, V-phase bus bar 200V, and W-phase bus bar 200W are accommodated in grooves 111U, 111V, and 111W. The connection terminal 204u, the external connection terminal 204v provided on the V-phase bus bar 200V, and the external connection terminal 204w provided on the W-phase bus bar 200W are formed at opposite positions.
In addition, nuts 121U, 121V, and 121W are disposed on the external terminal mounting portions 120U, 120V, and 120W. In the present embodiment, when the holding substrate 100 is formed of resin, the nuts 121U, 121V, and 121W are integrally formed. The nuts 121U, 121V, 121W have external terminal mounting portions 120U, 120V, 120W at the inlets of the nuts 121U, 121V, 121W so that screws can be inserted into the screw holes of the nuts 121U, 121V, 121W. It is integrally molded so as to be exposed from. By integrally forming nuts 121U, 121V, and 121W into which screws can be inserted with the holding substrate 100, external connection terminals 204u provided on the U-phase bus bar 200U and external connection terminals 204v provided on the V-phase bus bar 200V. The length of the electric motor 10 in the axial direction is increased depending on the parts necessary for connecting the external terminals 81U, 81V, 81W provided on the connector 80 to the external connection terminals 204w provided on the W-phase bus bar 200W. Can be suppressed.

In the flange portion 150 of the holding substrate 100, the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 200W, the first neutral point bus bar 200X, and the second neutral point are formed in the grooves 111U, 111V, 111W, 111X, and 111Y. With the point bus bar 200Y inserted (accommodated), the stator windings U1, V1, W1, U2, V2, W2 (partial stator windings 70A to 70L wound around the split cores 50A to 50L) One end or the other end of the winding is provided on the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 200W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y. Guide portions 151a to 151l are provided to guide the connection portion of the connection terminal (in this embodiment, a concave portion formed at the tip of the winding connection terminal, which will be described later). . The guide portions 151a to 151l are provided in the grooves 111U, 111V, 111W, 111X, and 111Y of the holding substrate 100 in the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 200W, the first neutral point bus bar 200X, and the second middle. Winding of U-phase bus bar 200U, V-phase bus bar 200V, W-phase bus bar 200W, first neutral point bus bar 200X, and second neutral point bus bar 200Y with sex point bus bar 200Y inserted (accommodated) It arrange | positions in the location facing the connection part (in this Embodiment, the recessed part formed in the front-end | tip part of a coil | winding connection terminal) of a connection terminal.
As shown in FIG. 5, the guide portion 151a has an outer opening 152a and an inner opening 153a. The outer opening 152a is formed in a V shape so that the opening interval gradually decreases from the outer side in the radial direction perpendicular to the axial direction of the holding substrate 100 toward the inner side when viewed from the direction perpendicular to the axial direction of the holding substrate 100. Is formed. The outer opening 152a is formed by a tapered inner wall, a curved inner wall, a stepped inner wall, or the like. The inner openings 153a are connected to the outer openings 152a when viewed from the direction perpendicular to the axial direction of the holding substrate 100, extend in the radial direction with the same opening interval (including substantially the same), and close in the radial direction. Thus, it is formed in a U shape. The inner opening is formed by a linear inner wall and a curved or linear end wall. The “shape in which the inner side is closed” of the inner opening 153a may be a shape in which the end of the stator winding is locked. In addition, the guide part 151a can also be formed in another shape.
The other guide portions 151b to 151l have the same configuration as the guide portion 151a, except that the symbol a is changed to b to l.

When the guide portions 151 a to 151 l are provided on the flange portion 150 of the holding substrate 100, if the flange portion 150 is thin, the strength of the flange portion 150 may be weakened. For this reason, it is preferable to provide a reinforcing member for ensuring the strength of the flange 150 of the holding substrate 100.
In the present embodiment, reinforcement members 155a to 155l are provided in the flange portion 150 at locations where the inner openings of the guide portions 151a to 151l are arranged.
In the present embodiment, the reinforcing member 155a is held by the holding member 100 along the inner wall and the end wall forming the inner opening 153a and from the flange 150 in the radial direction perpendicular to the axial direction of the holding substrate 100. It is formed as a wall-shaped rib extending toward the connection portion of the winding connection terminal of each bus bar (a recess formed at the tip of the winding connection terminal). The ribs (reinforcing members) may be provided continuously along the inner wall and the end wall, or may be provided discretely. The length in the radial direction can be selected as appropriate.
The other reinforcing members 155b to 155l have the same configuration as the guide member 155a only by changing the symbol a to b to l.

The holding substrate 100 is attached to one side of the stator core 50 in the axial direction. In the present embodiment, as shown in FIGS. 6, 23, and 24, a movement restriction member that restricts the movement of the holding substrate 100 in the axial direction and the circumferential direction with respect to the stator core 50 is provided. The movement restricting members are the holding substrate side movement restricting members (holding member side movement restricting members) 160a to 160e provided on the holding substrate 100 side, and the stator core side movement restricting member provided on the stator core 50 side. 60a to 60l.
The holding substrate side movement restricting members 160a to 160e are provided on the end surface 150a of the flange portion 150 of the holding substrate 100 on the side facing the stator core 50 (right side in FIG. 6). The holding substrate side movement restricting member 160a extends from the end surface 150a of the flange portion 150 along the axial direction of the holding member 100, and extends radially inward from both circumferential ends of the outer peripheral surface 162a. The side surfaces 163a and 164a, the bottom surface 161a disposed on the stator core 50 side from the outer peripheral surface 162a, are inclined inwardly in the radial direction from the radially inner end of the bottom surface 161a toward the end surface 150a. The inclined surface 165a, the inner peripheral surface 166a extending in the direction of the end surface 150a from the radially inner end of the inclined surface 165a, and the step surface 167a formed radially between the inner peripheral surface 166a and the outer peripheral surface 162a. have. A recess is formed by the end face 150a of the flange 150 facing the stator core 50, the outer peripheral face 162a, the side faces 163a and 164a, and the step face 167a. This recessed part acts as an engaging part with which the claw part of the stator core side movement control member 60a-60l mentioned later engages. In a state where the claw portions of the stator core side movement restricting members 60a to 60l are engaged with the engaging portion, the claw portion is moved in the axial direction of the holding substrate 100 by the end surface 150a and the step surface 167a of the flange portion 150. The movement is restricted, and the movement of the claw portion in the circumferential direction of the holding substrate 100 is restricted by the side surfaces 163a and 164a.
The holding substrate side movement restricting members 160b to 160e have the same configuration as the holding substrate side movement restricting member 160a only by changing the symbol a to be.

U-phase bus bar 200U, V-phase bus bar 200V, W-phase bus bar 200W, first neutral point bus bar 200X, second neutrality inserted (accommodated) in grooves 111U, 111V, 111W, 111X, 111Y of holding substrate 100 The configuration of the point bus bar 200Y will be described.
In this specification, “the axial direction of the main body of the bus bar” means the same direction as the axial direction of the holding substrate 100 in a state where the bus bar is held by the holding substrate 100.
U-phase bus bar 200U is shown in FIGS. U-phase bus bar 200U is formed by cutting a metal plate made of a conductive material to obtain a plate-like body, and bending the plate-like body.
The U-phase bus bar 200U has a main body, winding connection terminals 202u1 and 202u2, and an external connection terminal 204u.
The main body is composed of a band-shaped plate-like body, and has a first arc-shaped portion 200u1 whose inner peripheral surface has a radius of M2, a second arc-shaped portion 200u2 whose inner peripheral surface has a radius of M1, a first A connecting portion 200u3 that connects the arc-shaped portion 200u1 and the second arc-shaped portion 200u2 is provided.
In the present embodiment, the winding connection terminal 202u1 is provided at one end of the main body in the longitudinal direction, and the winding connection terminal 202u2 is provided at the other end in the longitudinal direction of the main body. The external connection terminal 204u is provided near the center of the main body. Further, the winding connection terminals 202u1 and 202u2 and the external connection terminal 204u are bent from the main body portion in a direction (typically a right angle direction) intersecting the axial direction of the main body portion. That is, it extends in the thickness direction of the main body from the main body.
Concave portions 203u1 and 203u2 into which end portions of the stator windings (partial stator windings) can be inserted are formed at the tip portions of the winding connection terminals 202u1 and 202u2.
In the center of the external connection terminal 204u, a hole 205u is formed at a location facing the inlet portion of the screw hole of the nut 121U provided in the external terminal mounting portion 120U in a state where the U-phase bus bar 200U is accommodated in the groove 111U. Is formed.
Further, positioning protrusions 112u1 and 112u2 formed on the bottom surface of the groove 111U are formed on the end surface (bottom surface) on the side facing the bottom surface of the groove 111U in which the U-phase bus bar 200U is inserted in the axial direction of the main body. Positioning recesses 201u1, 201u2 that can be engaged with each other are formed. The positioning protrusions 112u1 and 112u2 and the positioning recesses 201u1 and 201u2 constitute a positioning member that positions the U-phase bus bar 200U at a predetermined position in the groove 111U.

The V-phase bus bar 200V is shown in FIGS. V-phase bus bar 200V is formed by cutting a metal plate formed of a conductive material to obtain a plate-like body, and bending the plate-like body.
V-phase bus bar 200V has a main body, winding connection terminals 202v1, 202v2, and external connection terminal 204v.
The main body portion is constituted by a belt-like plate-like body, and has an arc-shaped portion 200V whose inner peripheral surface has a radius of M3.
In the present embodiment, the winding connection terminal 202v1 is provided at one end in the longitudinal direction of the main body, and the winding connection terminal 202v2 is provided at the other end in the longitudinal direction of the main body. The external connection terminal 204v is provided at a position closer to the winding connection terminal 202v1 direction than the central portion of the main body. The winding connection terminals 202v1 and 202v2 and the external connection terminal 204v are bent from the main body portion in a direction crossing the axial direction of the main body portion. That is, it extends in the thickness direction of the main body from the main body.
Concave portions 203v1 and 203v2 into which end portions of the stator windings (partial stator windings) can be inserted are formed at the tip portions of the winding connection terminals 202v1 and 202v2.
In the center of the external connection terminal 204v, there is a hole 205v at a position facing the inlet of the screw hole of the nut 121V provided in the external terminal mounting portion 120V in a state where the V-phase bus bar 200V is accommodated in the groove 111V. Is formed.
Further, positioning projections 112v1 and 112v2 formed on the bottom surface of the groove 111V are formed on the end surface (bottom surface) on the side facing the bottom surface of the groove 111V in which the V-phase bus bar 200V is inserted in the axial direction of the main body. Engaging positioning recesses 201v1, 201v2 are formed. The positioning protrusions 112v1 and 112v2 and the positioning recesses 201v1 and 201v2 constitute a positioning member that positions the V-phase bus bar 200V at a predetermined position in the groove 111V.

W-phase bus bar 200W is shown in FIGS. W-phase bus bar 200W is formed by cutting a metal plate made of a conductive material to obtain a plate-like body, and bending the plate-like body.
W-phase bus bar 200W includes a main body, winding connection terminals 202w1 and 202w2, and external connection terminal 204w.
The main body portion is configured by a belt-like plate-like body, and has an arc-shaped portion 200w whose inner peripheral surface has a radius of M2.
In the present embodiment, the winding connection terminal 202w1 is provided at one end in the longitudinal direction of the main body, and the winding connection terminal 202w2 is provided at the other end in the longitudinal direction of the main body. The external connection terminal 204w is provided at a position close to the winding connection terminal 202w1. The winding connection terminals 202w1 and 202w2 and the external connection terminal 204w are bent from the main body portion in a direction crossing the axial direction of the main body portion. That is, it extends in the thickness direction of the main body from the main body.
Concave portions 203w1 and 203w2 into which end portions of the stator windings (partial stator windings) can be inserted are formed at the tip portions of the winding connection terminals 202w1 and 202w2.
At the center of the external connection terminal 204w, a hole 205w is formed at a location facing the screw hole entrance portion of the nut 121W provided in the external terminal mounting portion 120W in a state where the W-phase bus bar 200W is accommodated in the groove 111W. Is formed.
Further, positioning protrusions 112w1 and 112w2 formed on the bottom surface of the groove 111W on the end surface (bottom surface) on the side facing the bottom surface of the groove 111W in which the W-phase bus bar 200W is inserted in the longitudinal direction of the main body portion, Engaging positioning recesses 201w1 and 201w2 are formed. The positioning protrusions 112w1 and 112w2 and the positioning recesses 201w1 and 201w2 constitute a positioning member that positions the W-phase bus bar 200W at a predetermined position in the groove 111W.

The first neutral point bus bar 200X is shown in FIGS. The first neutral point bus bar 200X is formed by cutting a metal plate formed of a conductive material to obtain a plate-like body, and bending the plate-like body.
The first neutral point bus bar 200X has a main body portion and winding connection terminals 202x1, 202x2, 202x3.
The main body portion is constituted by a belt-like plate-like body, and has an arc-shaped portion 200x whose inner peripheral surface has a radius of M1.
In the present embodiment, the winding connection terminal 202x1 is provided at one end of the main body in the longitudinal direction, and the winding connection terminal 202x3 is provided at the other end in the longitudinal direction of the main body. The external connection terminal 202x2 is provided at a position close to the winding connection terminal 202x3. The winding connection terminals 202x1, 202x2, 202x3 are bent from the main body portion in a direction crossing the axial direction of the main body portion. That is, it extends in the thickness direction of the main body from the main body.
Concave portions 203x1, 203x2, and 203x3 into which the ends of the stator windings (partial stator windings) can be inserted are formed at the tip portions of the winding connection terminals 202x1, 202x2, and 202x3.
Further, a positioning projection formed on the bottom surface of the groove 111X on the end surface (bottom surface) on the side facing the bottom surface of the groove 111X in which the first neutral point bus bar 200X is inserted in the longitudinal direction of the main body portion. Positioning recesses 201x1, 201x2, 201x3 that can be engaged with 112x1, 112x2, 112x3 are formed. The positioning protrusions 112x1 to 112x3 and the positioning recesses 201x1 to 201x3 constitute a positioning member that positions the first neutral point bus bar 200X at a predetermined position in the groove 111X.

The second neutral point bus bar 200Y is shown in FIGS. The second neutral point bus bar 200Y is formed by cutting a metal plate formed of a conductive material to obtain a plate-like body, and bending the plate-like body.
The second neutral point bus bar 200Y has a main body portion and winding connection terminals 202y1, 202y2, 202y3.
The main body portion is configured by a belt-like plate-like body, and has an arc-shaped portion 200y whose inner peripheral surface has a radius M1.
In the present embodiment, the winding connection terminal 202y1 is provided at one end of the main body in the longitudinal direction, and the winding connection terminal 202y3 is provided at the other end in the longitudinal direction of the main body. The external connection terminal 202y2 is provided at a position close to the winding connection terminal 202y1. The winding connection terminals 202y1, 202y2, 202y3 are bent from the main body portion in a direction crossing the axial direction of the main body portion. That is, it extends in the thickness direction of the main body from the main body.
Concave portions 203y1, 203y2, and 203y3 into which end portions of the stator windings (partial stator windings) can be inserted are formed at the tip portions of the winding connection terminals 202y1, 202y2, and 202y3.
Further, a positioning protrusion formed on the bottom surface of the groove 111Y on the end surface (bottom surface) on the side facing the bottom surface of the groove 111Y in which the second neutral point bus bar 200Y is inserted in the longitudinal direction of the main body portion. Positioning recesses 201y1, 201y2, 201y3 that can be engaged with 112y1, 112y2, 112y3 are formed. The positioning protrusions 112y1 to 112y3 and the positioning recesses 201y1 to 201y3 constitute a positioning member that positions the second neutral point bus bar 200Y at a predetermined position in the groove 111Y.

The radii M1, M2, and M3 are arc-shaped radii at the center of the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 300W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y. Alternatively, it may be an arcuate radius of the outer peripheral surface. The arc shape of the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 300W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y includes a substantially arc shape.
In the above description, for the sake of convenience, it has been described that the radius of the inner peripheral surface of the bus bar and the groove in which the bus bar is accommodated (for example, the U-phase bus bar 200U and the groove 111U) is the same radius. In order to be able to insert into the groove, it is necessary to provide an insertion allowance with slightly different radii. In the present specification, in the “form the bus bar and the groove for inserting (accommodating) the bus bar into an arc shape having the same radius”, an insertion allowance is provided to allow the bus bar and the groove to be inserted into the groove. A mode of forming an arc shape having different radii as much as possible is also included. That is, the bus bar and the groove do not have to be formed in an arc shape having the same radius.

Next, a winding connection device is configured using the holding substrate 100, the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 300W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y. To do.
That is, as shown in FIG. 7, the main body of the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 300W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y is held. A winding connection device is obtained by accommodating in the grooves 111U, 111V, 111W, 111X, 111Y of the substrate 100.
The U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 200W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y are accommodated in the grooves 111U, 111V, 111W, 111X, and 111Y of the holding substrate 100. The winding connection device thus prepared is shown in FIGS.

Next, the winding connection device holding the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 300W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y is replaced with a stator winding. A stator is obtained by attaching to the stator core 50 on which 70 is wound.
As described above, in the present embodiment, the stator core 50 is configured by the plurality of divided cores 50A to 50L.
Since the split cores 50A to 50L have the same configuration, the split core 50A will be described. The split core 50A is shown in FIGS.
The split core 50A is formed by laminating thin plate-shaped electromagnetic steel plates. The split core 50A includes an outer peripheral portion 51a having an arc shape and an inner peripheral portion 52a, and a connecting portion 53a that connects the outer peripheral portion 51a and the inner peripheral portion 52a. A teeth portion 54a is formed by the inner peripheral portion 52a and the connecting portion 53a.
An insulating member that covers the connecting portion 53a is provided between the inner peripheral portion 52a and the outer peripheral portion 51a. The insulating member is formed of, for example, a resin having insulating characteristics. In the present embodiment, the insulating member includes a first insulating member 56a1 and a second insulating member 56a2.
The first insulating member 56a1 is provided on the side facing the holding substrate 100 of the winding connection device. The first insulating member 56a1 is provided with a stator core side movement restricting member 60a. The stator core side movement restricting member 60a is disposed on the inner side in the radial direction perpendicular to the axial direction of the stator core 50 when the upper surface 61a disposed on the holding substrate 100 side and the stator core 50 are configured. The inner circumferential surface 62a along the circumferential direction, the outer circumferential surface 63a along the circumferential direction, arranged on the outer side in the radial direction, and arranged on both sides in the circumferential direction of the inner circumferential surface 62a and the outer circumferential surface 63a. An inclined surface 66a extending from the side surfaces 64a and 65a and the radially outer end of the upper surface 61a to the opposite side to the side facing the holding substrate 100 and inclined radially outward, and holding of the inclined surface 66a A step surface 67a is formed between the end opposite to the side facing the substrate 100 and the outer peripheral surface 63a. The upper surface 61a, the inner peripheral surface 62a, the outer peripheral surface 63a, the side surfaces 64a and 65a, the inclined surface 66a, and the step surface 67a constitute a claw portion. The stator core side movement restricting member 60a (claw portion) can be engaged with the recesses (engaging portions) of the holding substrate side movement restricting members 160a to 160d.
Then, the split cores 50A to 50L around which the stator windings U1, V1, W1, U2, V2, and W2 (partial stator windings 70A to 70L) are wound are arranged side by side on the inner peripheral side of the case 21. Thus, the stator core 50 is configured.

A stator core 50 wound with stator windings U1, V1, W1, U2, V2, and W2, a U-phase bus bar 200U, a V-phase bus bar 200V, a W-phase bus bar 200W, a first neutral point bus bar 200X, When attaching the holding substrate (winding connection device) 100 in which the second neutral point bus bar 200Y is inserted (accommodated) in the grooves 111U, 111V, 111W, 111X, 111Y, the stator windings U1, V1, W1, The ends of U2, V2, and W2 are connected to the U-phase bus bar 200U, the V-phase bus bar 200V, the W-phase bus bar 200W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y winding connection terminals 202u1, 202u2, 202v1, 202v2, 202w1, 202w2, 202x1 to 202x3, 202y1 to 202y3 are connected.
At this time, the end portions of the stator windings U1, V1, W1, U2, V2, W2 are guided by the guide portions 151a to 151l provided on the holding substrate 100 so that the U-phase bus bar 200U, the V-phase bus bar 200V, and the W-phase bus bar. It is guided to the winding connection terminals 202u1, 202u2, 202v1, 202v2, 202w1, 202w2, 202x1 to 202x3, 202y1 to 202y3 of 200W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y. That is, with the holding substrate 100 disposed on one side of the stator core 50 in the axial direction, the end of the stator winding of each phase is pushed inward in the radial direction intersecting the axial direction of the stator core 50. Thus, the ends of the stator windings of the respective phases are connected to the U-phase bus bar 200Y and the V-phase bus bar 200V held on the holding substrate 100 by the guide portions 151a to 151l provided on the flange portion 150 of the holding substrate 100. , W phase bus bar 200W, first neutral point bus bar 200X, and second neutral point bus bar 200Y are guided to the winding connection terminals. Thereby, the connection operation | work with the edge part of the stator winding | coil of each phase and the coil | winding connection terminal of each bus bar can be performed easily.
In the present embodiment, the winding connection terminals of each bus bar are extended from the main body of the holding board 100 to the outside in the radial direction perpendicular to the axial direction of the holding board 100, and the stator is provided at the tip of the winding connection terminal. A recess into which the end of the winding can be inserted is formed, and the end of the stator winding of each phase is guided by the guides 151a to 151l to the recess formed at the tip of the winding connection terminal of each bus bar. It is configured to be. Thereby, the connection operation | work with the stator winding | coil of each phase and the coil | winding connection terminal of each bus bar can be performed more easily.
Further, in the present embodiment, the reinforcing members 155a to 155l are provided at the locations where the inner openings of the guide portions 151a to 151l are arranged in the flange portion 150 of the holding substrate 100. Thereby, the strength of the flange 150 of the holding substrate 100 can be ensured. In particular, the reinforcing members 155a to 155l are formed at the tip end portions of the winding connection terminals along the inner wall and end walls forming the inner openings of the guide portions 151a to 151l and along the axial direction of the holding substrate 100. In the case of forming the rib as extending toward the recess, the reinforcing member is a guide portion (guide) for connecting the end of the stator winding to the recess formed at the tip of the winding connection terminal by welding or the like. Groove). In this case, it becomes easier to connect the end of the stator winding to the winding connection terminal.

In addition, the holding substrate 100 is provided on the holding substrate side movement restricting members 160a to 160e provided on the holding substrate 100 and the insulating member of the stator core 50 (the divided cores 50A to 50L constituting the stator core 50). Are attached to the stator core 50 in a state in which the movement in the axial direction and the circumferential direction with respect to the stator core 50 is restricted by the stator core side movement restricting members 60a to 60l (provided in the insulating member). In the present embodiment, the number of holding substrate side movement restricting members is smaller than the number of stator core side movement restricting members. For this reason, a movement control member acts only in the location where the protection board side movement control member is provided.
Here, using FIG. 23 and FIG. 24, an operation of restricting movement by the stator core side movement restricting member 60b and the holding substrate side movement restricting member 160d will be described.
When the holding substrate 100 holding each bus bar is pressed against the stator core 50 around which the stator winding 70 is wound, the inclined surface 66b of the stator core side movement restricting member 60b and the holding substrate side movement restricting member By the action of the inclined surface 165d of 160d, the stepped portion 67b of the stator core side movement restricting member 60b gets over the radial inclined surface 165d of the holding substrate movement restricting member 160d and engages with the stepped portion 167d. In this state, the claw portion of the stator core side movement restricting member 60b is formed on the holding substrate 100 (stator core 10) by the end surface 150a of the flange 150 of the holding substrate 100 and the stepped surface 167d of the holding substrate side movement restricting member 160d. Movement in the axial direction (vertical direction in FIG. 23) is restricted, and movement in the circumferential direction of the holding substrate 100 (stator core 50) is restricted by the side surfaces 163d and 164d of the holding substrate side movement restricting member 160d.

The stator is configured by attaching the holding substrate 100 holding each bus bar to the stator core 50 around which the stator coil 70 is wound.
Thereafter, the connector 80 is attached to the case 21, and the external connection terminal 204u of the U-phase bus bar 200U, the external connection terminal 204v of the V-phase bus bar 200V, and the W-phase bus bar 200W held by the holding base plate 100 constituting the winding connection device. External connection terminals 204w, external terminals 81U, 81V, 81W provided on the connector 80, screws 82U, 82V, 82, and nuts attached to the external terminal mounting portions 120U, 120V, 120W of the holding substrate 100. Connect by passing it through the screw.

As described above, in the present embodiment, a U-phase bus bar for star-connecting and externally connecting U-phase, V-phase, and W-phase stator windings wound around the stator core of the stator. 200U, V-phase bus bar 200V, W-phase bus bar 200W, first neutral point bus bar 200X and second neutral point bus bar 200Y, and grooves 111U, 111V, 111W and grooves 111X and 111Y for accommodating the respective bus bars, The V-phase bus bar 200V and the groove 111V, the W-phase bus bar 200W and the groove 111W, the first neutral point bus bar 200X and the groove 111X, and the second neutral point bus bar 200Y and the groove 111Y are configured by arc-shaped portions having different radii. The U-phase bus bar 200U and the groove 111U, the first arc-shaped portion having a radius equal to one of the different radii, It constitutes a connecting portion for connecting the second arcuate portion having a radius equal to the other one radially, the first and second arcuate portions.
Thereby, the U-phase bus bar, the V-phase bus bar, the W-phase bus bar, and the neutral point bus bar can be arranged in three layers (three rows) in the radial direction of the holding substrate. For this reason, the outer diameter size of the winding connection device can be reduced, and the motor can be miniaturized.
Moreover, in this Embodiment, the movement control member which controls the movement of the axial direction and circumferential direction with respect to the stator core 50 of the holding | maintenance board | substrate 100 of a coil | winding connection apparatus is provided. Thereby, the winding connection device can be firmly attached to the stator core 50.
Further, positioning protrusions are provided in the grooves (accommodating portions) 111U, 111V, 111W, 111X, and 111Y of the holding substrate 100, and U-phase bus bars 200U and V-phase bus bars 200V, W are accommodated in the respective grooves (accommodating portions). The phase bus bar 200W, the first neutral point bus bar 200X, and the second neutral point bus bar 200Y are provided with positioning recesses with which positioning protrusions can be engaged. Thereby, each bus bar can be easily arranged at a predetermined position of each groove.
Further, the winding connection terminal of each bus bar held on the main body portion of the holding substrate 100 of the winding connection device is extended from the main body portion of the holding substrate 100 to the outside in the radial direction perpendicular to the axial direction of the holding substrate. Of the stator windings U1, V1, W1, U2, V2, and W2 wound around the stator core 50 on the holding substrate 100 of the winding connection device. Is provided in a recess formed at the tip of the winding connection terminal of each bus bar held on the holding substrate 100. Thereby, the operation | work which connects the edge part of a stator winding | coil becomes easy.
Further, a reinforcing member is provided at a location where the holding substrate 100 is provided with an inner opening that constitutes the guide portion. Thus, the end of the stator winding can be easily connected to the winding connection terminal of the bus bar while maintaining the strength of the holding substrate. Further, by using this reinforcing member as a guide portion when the end portion of the stator winding is connected to the winding connection terminal, the operation of connecting the stator winding to the winding connection terminal is further facilitated.

In the first embodiment, the neutral point bus bar is configured by the first neutral point bus bar 200X and the second neutral point bus bar 200Y, but may be configured by one neutral point bus bar. A second embodiment using one neutral point bus bar will be described with reference to FIGS. FIG. 27 is a plan view of the winding connection device of the second embodiment, and FIG. 28 is a plan view of the neutral point bus bar 200Z used in the winding connection device of the second embodiment. It is.
In the second embodiment, the configuration of the neutral point bus bar 200Z and the groove 111Z that accommodates the neutral point bus bar 200Z is different from that of the first embodiment shown in FIGS.
The neutral point bus bar 200Z has a main body portion and winding connection terminals 202z1 to 202z6. The main body portion is constituted by a belt-like plate-like body, and has an arc-shaped portion 200z whose inner peripheral surface has a radius M1. The winding connection terminals 202z1 to 202z6 are bent outward from the main body in the radial direction. Moreover, the recessed part 203z1-203z6 which can insert the edge part of a stator coil | winding is formed in the front-end | tip location of the coil | winding connection terminal 202z1-202z6. The other ends of the stator windings U1, V1, W1, U2, V2, and W2 wound around the stator core 50 are connected to the winding connection terminals 202z1 to 202z6.
The groove 111Z that accommodates the neutral point bus bar 200Z is formed to have a circular shape portion having an inner peripheral surface with a radius of M1.
Although not shown, a positioning projection is formed on the bottom surface of the groove 111Z, as in the first embodiment, and the bottom surface of the groove 111Z of the neutral point bus bar 200Z. On the opposite end face (bottom surface), a positioning recess is formed that can be engaged with the positioning protrusion.

  In the above embodiment, a stator and a rotor are provided, and the stator includes a stator core, U-phase, V-phase, and W-phase stator windings wound around the stator core, U-phase, Although the description has been given of the rotating machine constituted by the winding connection device that connects the V-phase and W-phase stator windings in a star connection and is connected to the outside, the present invention relates to the stator core and the winding around the stator core. The U-phase, V-phase, and W-phase stator windings and the U-phase, V-phase, and W-phase stator windings are configured as a stator having a star connection and an external winding connection device. In addition, the U-phase, V-phase, and W-phase stator windings wound around the stator core may be star-connected and configured as a winding connection device that connects to the outside.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and changes can be made.
For example, the case where the stator windings are connected in a double star connection has been described. However, the winding connection technique of the present invention can be applied to a case where the stator windings are connected in a single star connection or in a case where three or more multiple star connections are made. Can be used.
Of the U-phase bus bar, V-phase bus bar, W-phase bus bar, neutral point bus bar and the groove that accommodates each bus bar, the bus bar and the groove other than the groove that accommodates the U-phase bus bar and the U-phase bus bar have arc shapes having different radii. A first phase-shaped portion having a radius equal to the radius of one of the arcs having different radii, and the radius of the other one arc The second arc-shaped portion having a radius equal to the first arc-shaped portion, the first arc-shaped portion and the connecting portion that connects the second arc-shaped portion, but the other bus bar and the groove are the first arc-shaped portion, the second These arc-shaped portions and connecting portions can also be used. Moreover, the same effect can be acquired by comprising at least 1 bus-bar and a groove | channel by a 1st circular arc shape part, a 2nd circular arc shape part, and a connection part.
The radius of the first arc-shaped portion and the second arc-shaped portion of the at least one bus bar and the groove is exactly the same as the radius of one of the other bus-bar and groove arc-shaped portions and the radius of the other one. It does not have to match. The radius of the first arc-shaped portion and the second arc-shaped portion of the at least one bus bar and the groove is slightly different from the radius of one of the other bus-bar and the arc-shaped portion of the groove and the other one. The aspect may also be that "the radius of the first arc-shaped portion and the second arc-shaped portion of the at least one bus bar and the groove is equal to the radius of one of the radius of the arc-shaped portion of the other bus bar and the groove and the other one. It is included in the embodiment of “matching the radius”.
At least one bus bar and a groove are constituted by a first arc-shaped portion, a second arc-shaped portion, and a connecting portion, and at least one bus bar and a groove excluding the groove are constituted by an arc-shaped portion. The groove may be constituted by a first arc-shaped portion, a second arc-shaped portion, and a connecting portion, and the groove excluding at least one groove may be constituted by an arc-shaped portion. In this case, each bus bar only needs to be configured to be accommodated in the corresponding groove.
The positioning member for positioning the bus bar in the groove formed in the holding substrate (winding connection device) is not limited to the positioning member constituted by the positioning projection and the positioning recess, and the positioning member has various configurations. Can be used. Further, the position and number of positioning members can be set as appropriate. The positioning member can be omitted.
As guide portions for guiding the end portions of the stator windings to the connection portions of the winding connection terminals, guide portions having various configurations can be used. Furthermore, the reinforcing member provided in the guide portion is not limited to the rib, and various reinforcing members can be used. The guide part and the reinforcing member can be omitted.
As a movement restricting member that restricts the movement of the holding substrate (winding connecting device) in the axial direction and the circumferential direction with respect to the stator core, movement restricting members having various configurations can be used. The movement restricting member can be omitted.
As a mode in which the bus bar is arranged in three layers (three rows) in a radial direction perpendicular to the axial direction of the holding substrate (winding connection device), grooves (accommodating portions) are formed in the holding substrate (winding connection device), and the bus bar Although the aspect which accommodates in the groove | channel (accommodating part) formed in the holding | maintenance board | substrate was used, the aspect which integrally molds a holding | maintenance board | substrate (winding connection apparatus) with resin with a bus bar can also be used. In the case of using this aspect, it is not necessary to house the bus bar in the groove formed in the holding substrate (winding connection device).
The arrangement position of the U-phase bus bar, the V-phase bus bar, the W-phase bus bar, the neutral point bus bar, the length in the circumferential direction, and the like can be appropriately changed. Moreover, the arrangement | positioning position in each bus bar of a coil | winding connection terminal and an external connection terminal can be selected suitably. In addition, it is preferable to set the position of the external connection terminal in each bus bar so that each external connection terminal is arranged in the vicinity in a state where each bus bar is held by the holding substrate.
Each component described in the embodiment can be used alone, or a plurality of appropriately selected components can be used in combination.
The number of magnetic poles and the number of slots of the rotating machine can be changed as appropriate.
Although the electric motor (surface magnet type electric motor) constituted by the rotor having the permanent magnet disposed on the outer peripheral surface of the rotor core and the stator having the stator core wound with the stator winding has been described, In the winding connection technology, a number of magnet insertion holes corresponding to the number of magnetic poles are formed, a rotor having a rotor core with permanent magnets inserted into the magnet insertion holes, and a stator winding wound. The present invention can be used for motors having various configurations such as an electric motor including a stator having a child core (referred to as “permanent magnet embedded electric motor”) and an electric motor not using a permanent magnet. Moreover, it is not limited to an electric motor, It can use for the rotary machine of various structures.

It is a connection diagram of the stator winding | coil of the electric motor 10 which is 1st Embodiment. It is a figure which shows the connection state of the stator winding | coil of the electric motor 10 which is 1st Embodiment. It is a longitudinal cross-sectional view along the axial direction of the electric motor 10 which is 1st Embodiment. It is the IV-IV line arrow directional view of FIG. It is a front view of the holding substrate 100 used with the winding connection device of the electric motor 10 of the first embodiment. FIG. 6 is a view taken along line VI-VI in FIG. 5. It is a figure explaining the operation | movement which hold | maintains a connection member to the holding substrate. It is a perspective view of U phase bus-bar 200U used with the coil | winding connection apparatus of the electric motor 10 of 1st Embodiment. 2 is a plan view of a U-phase bus bar 100. FIG. It is a perspective view of V phase bus-bar 200V used with the coil | winding connection apparatus of the electric motor 10 of 1st Embodiment. It is a top view of V phase bus bar 200V. It is a perspective view of W phase bus-bar 200W used with the coil | winding connection apparatus of the electric motor 10 of 1st Embodiment. It is a top view of W phase bus bar 200W. It is a perspective view of the 1st neutral point bus-bar 200X used with the coil | winding connection apparatus of the electric motor 10 of 1st Embodiment. It is a top view of the first neutral point bus bar 200X. It is a perspective view of 2nd neutral point bus-bar 200Y used with the coil | winding connection apparatus of the electric motor 10 of 1st Embodiment. It is a top view of the 2nd neutral point bus bar 200Y. It is a top view of the coil | winding connection apparatus of the electric motor 10 of 1st Embodiment. It is the XIX-XIX line arrow figure of FIG. It is a figure explaining the operation | movement which attaches the winding connection apparatus of 1st Embodiment to the stator core 50 in which the stator winding | coil 70 is wound. It is a perspective view of a split core. It is a perspective view of the split core to which the insulating member is attached. It is a figure explaining a movement control member. It is a XXIV arrow directional view of FIG. It is a figure explaining the operation | movement which connects an external terminal to a stator. It is a top view of the coil | winding connection apparatus of 2nd Embodiment. It is a top view of neutral point bus-bar 200Z used with the coil | winding connection apparatus of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electric motor 21 Case 31 Rotor core 33 Rotating shaft 50 Stator core 60a-60l Stator core side movement control member 50A-50L Split core 70 Stator winding 80 Connector 81U, 81V, 81W External terminal 82U, 82V, 82W Screw 100 Holding substrate (holding member)
111U, 111V, 111W, 111X, 111Y, 111Z groove (accommodating part)
112u1, 112u2, 112v1, 112v2, 112w1, 112w2, 112x1 to 112x3, 112y1 to 112y3 Positioning projections 120U, 120V, 120W External connection line mounting portions 121U, 121V, 121W Nuts 151a to 151l Guide portions 160a to 160e Holding member Side movement restricting members 155a to 155l Reinforcing member 200U U-phase bus bar (U-phase conductive member)
200V V-phase bus bar (V-phase conductive member)
200W W-phase bus bar (W-phase conductive member)
200X First neutral point bus bar (first neutral point conductive member)
200Y second neutral point bus bar (second neutral point conductive member)
200Z Neutral point bus bar 201u1, 201u2, 201v1, 201v2, 201w1, 201w2, 201x1 to 201x3, 201y1 to 201y3 Concave portion for positioning 202u1, 202u2, 202v1, 202v2, 202w1, 202w2, 202x1 to 202x3, 202y1 to 202y3, 202z1 202z6 Winding connection terminals 203u1, 203u2, 203v1, 203v2, 203w1, 203w2, 203x1 to 203x3, 203y1 to 203y3, 203z1 to 203z6 Recesses 204u, 204v, 204w External connection terminals

Claims (13)

A first phase stator winding, a second phase stator winding, and a third phase stator winding provided on a stator core of the stator are star-connected, and the first phase stator winding line, a connecting member connecting the second phase of the stator winding and the third phase of the stator winding to outside, provided on one side in the axial direction of the stator core, to hold the connecting member A winding connection device for a rotating machine comprising a holding member,
The connection member is composed of a first conductive member, a second conductive member, a third conductive member, and a fourth conductive member,
The first conductive member is connected to a main body, a first winding connection terminal provided on the main body and connected to one end of the first-phase stator winding and the outside. Having a first external connection terminal;
The second conductive member is provided on the main body and the main body, and is connected to the second winding connection terminal connected to one end of the second-phase stator winding and the outside. A second external connection terminal;
The third conductive member is connected to the main body, a third winding connection terminal provided on the main body, connected to one end of the third-phase stator winding, and the outside. A third external connection terminal;
Said fourth conductive member includes a main body portion, provided in the body portion, the first phase of the stator winding, the second phase of the stator winding and the third-phase stator winding of each A fourth winding connection terminal connected to the other end;
The first conductive member, said second conductive members, from the in the third state in which the conductive member and the fourth conductive member is held by the holding member, a direction perpendicular to the axial direction of the holding member look, the body portion of the first conductive member, the body portion of the second conductive member, at least one body portion of the main body portion of the third conductive member body portion and the fourth conductive member Are disposed along arcs having different radii, and the at least one body portion is along one arc and one other arc of the arcs having different radii, and It is arranged across one arc and another arc ,
The holding member includes a first external connection terminal of the first conductive member in a state where the first conductive member, the second conductive member, and the third conductive member are held by the holding member, A rotation characterized by being integrally formed of a resin together with a nut disposed at a location facing the second external connection terminal of the second conductive member and the third external connection terminal of the third conductive member. Winding connection device for machine. The winding connection device for a rotating machine according to claim 1,
The holding member includes a plurality of housing portions that house the main body portion of the first conductive member, the main body portion of the second conductive member, the main body portion of the third conductive member, and the main body portion of the fourth conductive member. Formed,
When viewed from a direction perpendicular to the axial direction of the holding member, the accommodating portions excluding at least one accommodating portion of the plurality of accommodating portions are formed along arcs having different radii, and the at least one accommodating portion Is formed along one arc and another arc of the arcs having different radii, and is formed across the one arc and the other arc, and the first conductive member At least one of the main body part, the main body part of the second conductive member, the main body part of the third conductive member, and the main body part of the fourth conductive member can be accommodated in the at least one accommodating part. The winding connection device for a rotating machine, wherein the main body part formed and excluding the at least one main body part is formed so as to be accommodated in the accommodating part excluding the at least one accommodating part. The winding connection device for a rotating machine according to claim 2,
Positioning member for positioning the main body portion of the first conductive member, the main body portion of the second conductive member, the main body portion of the third conductive member, and the main body portion of the fourth conductive member in the plurality of housing portions. A winding connection device for a rotating machine, characterized in that is provided. The winding connection device for a rotating machine according to claim 3,
The positioning member includes a main body portion of the first conductive member, a main body portion of the second conductive member, a main body portion of the third conductive member, a main body portion of the fourth conductive member, and the plurality of housing portions. A winding connecting device for a rotating machine, comprising: a positioning projection provided on one side of the motor, and a positioning recess provided on the other side and engageable with the positioning projection. . The winding connection device for a rotating machine according to any one of claims 1 to 4,
One end or the other end of the first-phase stator winding, the second-phase stator winding, and the third-phase stator winding is provided on the holding member. A first winding connection terminal of the first conductive member, a second winding connection terminal of the second conductive member, a third winding connection terminal of the third conductive member, and A guide portion is provided for guiding to the fourth winding connection terminal of the fourth conductive member ;
The guide portion has an outer opening formed so that the opening interval gradually decreases from the outer side in the radial direction perpendicular to the axial direction of the holding member toward the inner side when viewed from the direction perpendicular to the axial direction of the holding member. And an inner opening that is connected to the outer opening, extends at the same opening interval along a radial direction perpendicular to the axial direction of the holding member, and is formed in a shape in which the inner side is closed. A winding connection device for a rotating machine. The winding connection device for a rotating machine according to claim 5,
The holding member has a cylindrical shape that holds the main body portion of the first conductive member, the main body portion of the second conductive member, the main body portion of the third conductive member, and the main body portion of the fourth conductive member . It is composed of a main body part and a collar part extending radially outward from the main body part,
The first winding connection terminal of the first conductive member, the second winding connection terminal of the second conductive member, the third winding connection terminal of the third conductive member, and the fourth conductivity The fourth winding connection terminal of the member extends radially outward from the main body of the holding member, and the first-phase stator winding and the second phase at the radially outer tip portion. A recessed portion into which one end or the other end of the stator winding, the third phase stator winding, and the third phase stator winding can be inserted,
The guide portion includes a first winding connection terminal of the first conductive member, a second winding connection terminal of the second conductive member, and a third conductive member on the flange portion of the holding member. A winding connection device for a rotating machine, wherein the winding connection device for a rotating machine is provided at a location corresponding to a recess formed in a third winding connection terminal and a fourth winding connection terminal of the fourth conductive member . The winding connection device for a rotating machine according to claim 5 or 6,
A winding connecting device for a rotating machine, wherein the holding member is provided with a reinforcing member at a position of an inner opening of the guide portion. A first phase stator winding, a second phase stator winding, and a third phase stator winding provided on a stator core of the stator are star-connected, and the first phase stator winding A wire, a connection member for connecting the second-phase stator winding and the third-phase stator winding to the outside, and one side in the axial direction of the stator core, and holding the connection member A winding connection device for a rotating machine comprising a holding member,
The connection member is composed of a first conductive member, a second conductive member, a third conductive member, and a fourth conductive member,
The first conductive member is connected to a main body, a first winding connection terminal provided on the main body and connected to one end of the first-phase stator winding and the outside. Having a first external connection terminal;
The second conductive member is provided on the main body and the main body, and is connected to the second winding connection terminal connected to one end of the second-phase stator winding and the outside. A second external connection terminal;
The third conductive member is connected to the main body, a third winding connection terminal provided on the main body, connected to one end of the third-phase stator winding, and the outside. A third external connection terminal;
The fourth conductive member is provided in the main body and the main body, and each of the first-phase stator winding, the second-phase stator winding, and the third-phase stator winding A fourth winding connection terminal connected to the other end;
The holding member has a cylindrical shape that holds the main body portion of the first conductive member, the main body portion of the second conductive member, the main body portion of the third conductive member, and the main body portion of the fourth conductive member. It is composed of a main body part and a collar part extending radially outward from the main body part,
When the first conductive member, the second conductive member, the third conductive member, and the fourth conductive member are held by the main body of the holding member, they are perpendicular to the axial direction of the holding member. When viewed from any direction, at least one of the main body portion of the first conductive member, the main body portion of the second conductive member, the main body portion of the third conductive member and the main body portion of the fourth conductive member. The main body portions excluding one main body portion are arranged along arcs having different radii, and the at least one main body portion is along one arc of the arcs having different radii and the other arc. And arranged across the one arc and the other arc,
The first winding connection terminal of the first conductive member, the second winding connection terminal of the second conductive member, the third winding connection terminal of the third conductive member, and the fourth conductivity The fourth winding connection terminal of the member extends radially outward from the main body of the holding member, and the first-phase stator winding and the second phase at the radially outer tip portion. A recess into which one end or the other end of the stator winding of the third phase and the stator winding of the third phase can be inserted is formed.
One end or the other end of the first-phase stator winding, the second-phase stator winding, and the third-phase stator winding is disposed on the flange portion of the holding member, The first winding connection terminal of the first conductive member, the second winding connection terminal of the second conductive member, and the third of the third conductive member held by the main body of the holding member A guide portion and a reinforcing member are provided for guiding the winding connection terminal and the concave portion of the fourth winding connection terminal of the fourth conductive member;
The guide portion has an outer opening formed so that the opening interval gradually decreases from the outer side in the radial direction perpendicular to the axial direction of the holding member toward the inner side when viewed from the direction perpendicular to the axial direction of the holding member And an inner opening that is connected to the outer opening, extends at the same opening interval along a radial direction perpendicular to the axial direction of the holding member, and is formed in a shape in which the inner side is closed. ,
The winding connecting device for a rotating machine, wherein the reinforcing member is provided at a position of an inner opening of the guide portion. A stator core, a first-phase stator winding, a second-phase stator winding and a third-phase stator winding provided on the stator core, and one of the stator cores in the axial direction; provided on the side, provided with a winding connection device connected to the outside together with the first phase of the stator winding, the stator winding of the second phase of the stator windings wound and the third phase to star connection A stator for a rotating machine,
A stator for a rotating machine, wherein the winding connecting apparatus for a rotating machine according to any one of claims 1 to 8 is used as the winding connecting apparatus. The stator for a rotating machine according to claim 9, wherein
The stator core is composed of a plurality of divided cores,
The first-phase stator winding, the second-phase stator winding, and the third-phase stator winding are continuously wound around at least two divided cores disposed adjacent to each other. A stator for a rotating machine. A stator for a rotating machine according to claim 9 or 10,
A stator for a rotating machine, wherein a movement restricting member for restricting movement of the holding member in the axial direction and the circumferential direction with respect to the stator core is provided. The stator for a rotating machine according to claim 11,
The stator core is provided with an insulating member at a place where the first-phase stator winding, the second-phase stator winding, and the third-phase stator winding are wound,
The movement restricting member is provided with a claw provided on one of the insulating member and the holding member, and provided on the other, and the claw provided on the one is restricted in movement in the axial direction and the circumferential direction. A stator for a rotating machine, comprising an engaging portion that can be engaged. A rotating machine comprising a rotor and a stator,
A rotating machine using the stator for a rotating machine according to any one of claims 9 to 12 as the stator.

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