JPH06233483A - Connection structure of coil winding in stator - Google Patents

Abstract

(57) [Summary] [Object] To provide a wire connection structure of a coil winding in a stator, which is easy to manufacture and structure and has a small overall shape. [Structure] In the wiring unit 16 which is a conductor, one phase-separating conductive member 18 to 20 having the same shape is used for each phase, and is laminated and fixed in an electrically insulated state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil winding wire connection structure in a stator incorporated in an electric machine such as a motor or a generator.

[0002]

2. Description of the Related Art Conventionally, a coil winding wire connection structure in a stator, in which coil windings of the same phase are connected via a conductor, is disclosed in, for example, Japanese Patent Application Laid-Open Nos. 3-245760 and 4-4.
No. 5,875,51.

The former conductor having the wire connection structure (hereinafter referred to as the first conventional structure) disclosed in Japanese Patent Laid-Open No. 3-245760 is a conductive member for phase distinction having the same number of shapes corresponding to each phase. And one common conductive member, and the conductive members for phase separation are arranged on the outer peripheral portion of the common conductive member in the same plane and engaged with each other. It is fixed by the simultaneously molded bracket body. Then, one end of each coil winding is connected for each phase by each phase-dependent conductive member, and the other end of each coil winding is connected for each phase by the common conductive member.

Also, the latter connection structure disclosed in Japanese Patent Laid-Open No. 4-58751 (hereinafter referred to as the second conventional structure).
The conductor is formed by forming a plurality of three kinds of grooves having different center angles on the outer peripheral surface of the bracket main body made of thermoplastic synthetic resin at intervals in the circumferential direction and the axial direction. 3 types of arc-shaped conductive members corresponding to the above are provided, each of the conductive members is fitted into a corresponding groove, and one end of each coil winding is connected by each of the conductive members by each phase. In addition, the other ends of the coil windings are connected to each other.

[0005]

In the above-mentioned first conventional structure, the conductive members for phase separation are arranged on the outer peripheral portion of the common conductive member so as to be engaged with each other in the same plane. Therefore, there is a problem that the entire shape becomes large in the radial direction.

Further, in the second conventional structure, there is a problem that the structure becomes complicated because it is necessary to provide three kinds of conductive members having different shapes.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a coil winding wire connection structure in a stator, which is simple in manufacture and construction and whose overall shape is miniaturized. Is.

[0008]

In order to achieve the above object, the first invention of the present invention relates to a wire connection structure of coil windings in a stator, in which coil windings of the same phase are connected via a conductor. In the above-mentioned conductor, one phase-differentiating conductive member having the same shape is used for each phase of at least two phases, and they are laminated and fixed in an electrically insulated state.

In order to achieve the same object, a second invention of the present invention is a wire winding structure of a coil winding in a stator, wherein coil windings of the same phase are connected via a wire conductor. Uses at least one phase-conducting conductive member having the same shape in each of the at least two phases, and further comprises a common conductive member commonly connecting the coil winding ends of different phases. The member and the common conductive member are laminated and fixed in an electrically insulated state.

[0010]

According to the structure of claim 1, since the conductive members for phase separation have the same shape, they are easy to manufacture, the structure is simple, and the size is small because they are laminated.

Further, by stacking and fixing the phase-separating conductive member and the common conductive member in an electrically insulated state as in claim 2, the manufacture is easier, the structure is simple, and the size can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical cross-sectional view of a motor having a coil winding connection structure in a stator according to an embodiment of the present invention. In FIG. 1, 1 is a motor, a motor case 2, a rotor 3 and , And the stator 4 as main constituent elements.

The motor case 2 is a cylindrical case body 5
End plates 6 and 7 are attached to both ends of the.

In the rotor 3, a magnetic yoke 9 is press-fitted onto the rotating shaft 8 and a magnet 10 is provided on the magnetic yoke 9.
Both ends of the rotary shaft 8 are rotatably supported by the central portions of the end plates 6 and 7 via bearings 11 and 12.

As shown in FIG. 2, the stator 4 has a stator body 13 formed by laminating a large number of magnetic thin plates, and a plurality (12 in this embodiment) of magnetic pole pieces 14 provided on the stator body 13. The coil winding 15 is wound around the. The stator 4 is fixed to the inner peripheral surface of the case body 5, and a magnetic yoke 9 is rotatably fitted inside the stator 4.

The stator 4 corresponds to a three-phase structure of U-phase, V-phase and W-phase.
Four items corresponding to the V and W phases are addressed.

Coil winding 15 wound around each pole piece
One end (for example, a winding start end: an output terminal) 15a and the other end (for example, a winding end: an input terminal) 15b extend outwardly from one end along the axial direction of the stator body 13 as shown in FIG. There is.

In each of the U-phase, V-phase and W-phase, one end 15a and the other end 15b of each coil winding 15 of the same phase are the wiring unit (conductor) 1 which is the gist of the present invention.
It is connected via 6.

The connection unit 16 is constructed as shown in FIGS. That is, one unit body 1
7, and the first, second, and third phase-dependent conductive members (bus bars) 18, 19 and 20 corresponding to the respective U-phase, V-phase and W-phase.
And one common conductive member (midpoint ring busbar) 21
And the first, second, third and fourth insulators 22, 23, 2
4 and 25.

The unit main body 17 is made of an electrically insulating material such as synthetic resin, and has inner and outer peripheral side walls 27, 28 and an intermediate peripheral side wall 29 integrally formed on one side surface of the ring member 26.

A plurality (12 in this embodiment) of substantially U-shaped notches 30 are formed at equal intervals in the circumferential direction from the inner peripheral side wall 27 to the ring member 26, and each notch is formed. Three
The other ends 15b of the coil windings 15 are inserted into the respective 0s.

The outer peripheral side wall 28 has an opening 31 in part. A plurality of substantially U-shaped notches 32 (eight in this embodiment) are formed on the outer peripheral side wall 28 at equal intervals in the circumferential direction. The projections of the phase-separating conductive members 18 to 20 of No. 3 are engaged with each other.

The first to third conductive members for phase separation 18 to 20 have the same shape as each other, and have a substantially C-shaped main body 33 made of a conductive material such as a copper plate, and the outer peripheral edge of the main body 33. A plurality of (four in this embodiment) protrusions 34 are integrally provided on the portion at equal intervals in the circumferential direction. A substantially U-shaped fixing portion 35 is integrally formed on the lower surface of the protruding end portion of each of the protrusions 34. Then, the first to third conductive members for phase separation 18
Nos. 20 to 20 are fitted to each other in the unit main body 17 between the outer peripheral side walls 27 and 28 and are stacked in the axial direction, and the protrusions 34 are engaged in the notches 32 of the outer peripheral side wall 28 of the unit main body 17. . Further, the coil winding 15 is attached to the fixed portion 35.
One end 15a is fixed by crimping or soldering. Further, a terminal piece 36 serving as an output terminal is integrally formed at one end of the main body 33, a nut 38 is fitted in a hole 37 of the terminal piece 36, and a screw 39 is screwed into the nut 38. Connection wires (not shown) of an external device (not shown) are connected to these terminal pieces 36 via screws 39.

The common conductive member 21 has a ring shape made of a conductive material such as a copper plate, and a plurality of U-shaped notches 40 (12 in this embodiment) are formed on the inner peripheral surface thereof. There is. The other end 15b of the coil winding 15 is provided in these notches 40.
Are respectively inserted and fixed by soldering or the like. The common conductive member 21 is fitted between the inner peripheral side wall 27 and the intermediate peripheral side wall 29 of the unit main body 17, and in the fitted state, the notch 40 of the common conductive member 21 is a unit. Inner peripheral side wall 27 of the main body 17
Correspondingly, it corresponds to the notch 30.

The first to third insulators 22 to 24 are made of an electrically insulating material such as synthetic resin and have a ring shape with the same diameter. The first insulator 22 is interposed between the first phase-dividing conductive member 18 and the second phase-dividing conductive member 19.
In addition, the second insulator 23 is the second phase separation conductive member 19
And the third conductive member 20 for phase separation. Further, the third insulator 24 is interposed between the third phase-dividing conductive member 20 and the end plate 7 on the right side of the motor case 2 in FIG. 1.

The fourth insulator 25 is made of an electrical insulating material such as synthetic resin and has a ring shape having the same diameter as the common conductive member 21. Then, it is fitted into the inner peripheral side wall 27 of the unit main body 17 to cover the surface of the common conductive member 21.

The conductive members for each phase 18 to 20 and the common conductive member 21 are laminated and fixed in an electrically insulated state.

After the disassembling connection unit 16 is assembled as shown in FIGS. 3 and 4, as shown in FIG. 5, it is opposed to one side of the stator 4 as shown in FIG. The one end 15a of 15 and each fixing portion 35 are aligned.

In this state, by moving the stator 4 and the connection unit 16 relatively to each other, for example, U
One ends 15a of the four phase coil windings 15 are inserted into the respective fixing portions 35 of the first phase-specific conductive member 18. Also, for example, one end 15a of the four coil windings 15 for V phase
Are inserted into the respective fixing portions 35 of the second phase separation conductive member 19. Furthermore, for example, four coil windings 15 for W phase
One end 15a of each of the fixing portions 3 of the third phase-dividing conductive member 19
Insert in 5 respectively.

On the other hand, the other ends 1 of the coil windings 15 of all the phases
5b is a cutout portion 30 of the inner peripheral side wall 27 of the unit body 17.
It passes through each inside and is inserted in the notch 40 of the common conductive member 21, respectively.

After this state, each coil winding 1
5, one end 15a of the first to third conductive members for phase separation 18-2
The fixing member 35 of 0 is fixed by crimping or soldering, and the other end 15b is fixed to the notch 40 of the common conductive member 21 by soldering or the like.

Thus, for example, the U-phase coil winding 15
15a of the V phase coil winding 15 via the first conductive member 18 for phase distinction, and one end 15a of the coil winding 15 of V phase through the conductive member 19 for second phase classification, the coil winding 15 of W phase 15a are connected to each other via the third conductive member 20 for phase distinction, and the other ends 15b of the coil windings 15 of all the phases are connected to each other via the common conductive member 21. Is.

The conductive members for phase separation are preferably used in all phases, but may be used in at least two phases.

[0035]

As described above, according to the coil winding wire connection structure in the stator of the first aspect of the present invention, the conductive members for each phase for connecting one ends of the coil windings of each phase are the same. Because of its shape, it is easy to manufacture, its structure is simple, and since it is laminated, it becomes compact.

Further, according to the coil winding wire connection structure in the stator of the second aspect of the present invention, the phase-separating conductive member and the common conductive member are laminated and fixed in an electrically insulated state, so that further manufacturing is possible. It is easy to use, simple in configuration, and small in size.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a motor having a coil winding wire connection structure in a stator according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state where a stator having a wire connection structure and a wire connecting unit in FIG. 1 are separated from each other.

FIG. 3 is a front view in which a part of the connection unit in the connection structure of FIG. 1 is cut away.

FIG. 4 is a vertical sectional view of the connection unit of FIG.

5 is an exploded perspective view of the connection unit of FIG.

[Explanation of symbols]

 Reference Signs List 13 stator body 14 pole piece 15 coil winding 15a one end 15b other end 16 connection unit (conductor) 18 first phase-specific conductive member 19 second phase-specific conductive member 20 third phase-specific conductive member 21 Common Conductive Member 22 First Insulator 23 Second Insulator 24 Third Insulator 25 Fourth Insulator

Claims (2)

[Claims] 1. In a wire connection structure of coil windings in a stator in which coil windings of the same phase are connected via a conductor, the conductor has the same shape in each of at least two phases. A wiring structure for coil windings in a stator, characterized in that one conductive member for phase separation is used and laminated and fixed in an electrically insulated state. 2. In a coil winding wire connection structure in a stator, in which coil windings of the same phase are connected via conductors, the conductors have the same shape in at least two phases. A separate conductive member is used, and a common conductive member that commonly connects the coil winding ends of different phases is further provided, and the phase-separated conductive member and the common conductive member are laminated and fixed in an electrically insulated state. The coil winding wire connection structure in the stator is characterized by the above.