JP4112292B2 - Stator and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stator in which a winding is wound intensively for each tooth and a method for manufacturing the same.
[0002]
[Prior art]
As a conventional stator, for example, there is one disclosed in Japanese Patent Laid-Open No. 2001-25198. The stator 1 is concentrated with respect to the teeth 3 such that a plurality of teeth 3 extending toward the inner periphery are arranged side by side and different phases are sequentially arranged in the circumferential direction. And a three-phase coil 4 (4U, 4V, 4W) wound around. In order to connect the coils 4 of these phases to a neutral point, an annular bus ring 5 made of a conductive member is provided, and the bus ring 5 performs a neutral point connection. In addition, the code | symbol 6 (6U, 6V, 6W) is a current collection / distribution ring for connecting the coil 4 to an external apparatus (not shown), and the code | symbol 7 has shown the cover part.
[0003]
[Problems to be solved by the invention]
However, the ring body 5 of the power collection and distribution ring 4 is manufactured by punching out a substantially rectangular plate 8 in an annular shape as shown in FIG. For this reason, the remaining part of the plate 8 (hatched part in FIG. 6) is wasted, resulting in a problem that the material yield is poor and the cost burden is large.
Conventionally, the winding has been coated, and in order to conduct electricity, this coating has been removed and solder connection between the winding and the neutral point connection has been performed. Such lead time was large.
[0004]
This invention is made | formed in view of such a situation, and it aims at providing the stator which can improve a material yield and can reduce a cost burden.
Another object of the present invention is to provide a stator manufacturing method capable of reducing the lead time required for manufacturing the stator.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention described in claim 1 includes a plurality of teeth extending in the radial direction and arranged in the circumferential direction (for example, teeth 22 in an embodiment described later), and the plurality of arrangements. A yoke portion (for example, a yoke portion 23 in an embodiment to be described later) connecting the teeth to be manufactured, and a stator winding (for example, an embodiment to be described later) made of a conductive wire wound around the teeth. And a stator (for example, a stator 20 in an embodiment to be described later) having the insulating member disposed between the teeth and the stator winding. The outer peripheral side holding member (for example, outer peripheral side holding portion 27 in the embodiment described later) and the inner peripheral side holding member (for example, later described implementation) The stator winding is fixed to the outer peripheral side holding member and the inner peripheral side holding member, respectively, with respect to a part of the conductive wire extending from the winding portion. The inner peripheral holding member has a conductor holding part (for example, a conductor holding part 31 in an embodiment described later), and a U-shaped receiving part (for example, in an embodiment described later) in the conductor holding part. U-shaped receiving part 43) is formed, and the extending direction of the receiving surface of the U-shaped receiving part is arranged so as to be parallel to the circumferential direction of the ring formed by the stator, and the adjacent conductors Virtual connection lines connected between the open ends of the holding portion are arranged to form an arc, and the U-shaped receiving portion of the inner peripheral holding member is connected to a neutral point connection of the stator winding. Conductive wires (e.g. implementations described below) Are electrically connected by a neutral point connecting wires 30) in state, the outer circumferential support member, that is electrically connected to each other for a plurality of the stator windings are distinguished for each predetermined phase, Is a stator characterized by
[0006]
The invention described in claim 2 is the one described in claim 1, wherein the U-shaped receiving portion of the inner peripheral holding member is configured to connect the neutral point of the stator winding. The stator is characterized in that it is electrically connected by a conductive wire made of the same type of member as the wire constituting the stator winding.
[0007]
The invention described in claim 3 is the one described in claim 1, wherein the U-shaped receiving portion of the inner peripheral holding member is continuous with the one stator winding. A neutral wire connecting wire formed by drawing the U-shaped receiving portions of the plurality of inner peripheral holding members so that the other plurality of stator windings are connected to the neutral point. The stator is characterized by being electrically connected.
[0008]
Further , the holding member on the side not electrically connected by the neutral point connecting lead wire is electrically connected to each other with respect to a plurality of stator windings distinguished for each predetermined phase. Is a stator.
[0009]
The invention described in claim 4 is wound around each of the teeth extending in the radial direction and arranged in the circumferential direction, the yoke portion connecting the plurality of arranged teeth, and the teeth. A stator winding made of a conductive wire, an insulating member disposed between the teeth and the stator winding, and a plurality of the stator windings are electrically connected to be neutrally connected. A neutral point connecting wire, and a conductive holding member that holds the conductive wire disposed on the outer side and the inner side when viewed from the radial direction of the stator with respect to the insulating member. The holding member on the inner side has a conductor holding part, and a U-shaped receiving part is formed in the conductor holding part, and the extending direction of the receiving surface of the U-shaped receiving part is defined by the stator. Arranged parallel to the circumferential direction of the ring, the open ends of adjacent conductor holders A method of manufacturing a stator continued virtual connecting line, which are arranged to form an arc, the holding member to the outer side and the inner side as viewed from the radial direction of the stator with respect to the insulating member A winding forming step of fixing one end of the conductive wire to any one of the holding members, and fixing the conductive wire by the other holding member to form the stator winding; A continuous conductive wire is passed through the U-shaped receiving portion and fixed by a plurality of holding members on the inner side, and the conductive wire and the holding member are electrically connected to the neutral point connection. And a neutral point connecting step of forming a conducting wire for the stator.
[0010]
The invention described in claim 5 is the invention described in claim 4, and is neutral without cutting the conductive wire fixed by the holding member on the inner side after the end of the winding forming step. It is a manufacturing method of the stator characterized by changing to a point connection process.
[0011]
The invention described in claim 6 is the one described in claim 4 or claim 5 , wherein the winding forming step is performed after the conductive wire is held by the holding member between the yoke portions. Is a method for manufacturing a stator.
[0012]
The invention as set forth in claim 7, arrangement as claimed in claim 4 according to claim 6, in the neutral point connection step, electrical connection between the conductive wire and the holding member It is a manufacturing method of a stator characterized by performing by electric welding by giving an electric current to a contact interface of the holding member and the conductive wire.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a stator and a manufacturing method thereof according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing a stator and a manufacturing method thereof according to the first embodiment of the present invention. 2 is an enlarged view of a main part of the stator shown in FIG. 1, and FIG. 3 is an exploded view of the stator of FIG.
[0014]
As shown in FIG. 3, the stator 20 includes a stator 21 formed in a substantially annular shape from a magnetically permeable material. The stator 21 includes a plurality of teeth 22 that are arranged at intervals in the circumferential direction and extend in the radial direction, and a yoke portion 23 that connects the outer peripheral sides between adjacent teeth 22. Further, the teeth 22 have a shape that slightly protrudes at the tip end side in the inner diameter direction, so that an insulating member 24 and a winding 25 described later can be easily held. In the present embodiment, the teeth 22 and the yoke portion 23 are integrally formed.
[0015]
A pair of insulating members 24 (24a, 24b) formed in a bobbin shape is attached to each tooth 22 of the stator 21 from both sides in the axial direction of the stator 21 as indicated by arrows A and B. The insulating members 24 a and 24 b are formed in a substantially U-shaped cross-section that can be engaged with each other, and the width and height of the insulating members 24 a and 24 b correspond to the width and height of the tooth 22, respectively. For this reason, when the insulating member 24 is attached to the tooth 22, the side surface of the tooth 22 is reliably covered with the insulating member 24.
[0016]
In addition, the insulating members 24a and 24b are respectively provided with outer peripheral flanges 34a and 34b on the outer peripheral side in the radial direction so as to cover the inner peripheral surface of the yoke portion 23. The insulating members 24a and 24b are respectively provided with inner peripheral flanges 35a and 35b on the radially inner peripheral side so as to cover the tips of the side surfaces of the teeth 22.
[0017]
Since the insulating members 24a and 24b are formed as described above, the winding 25 can be applied in a state where insulation from the teeth 22 and the yoke portion 23 is ensured. Further, since the insulating member 24 is formed by engaging the pair of insulating members 24a and 24b, the attachment and detachment to the teeth 22 can be easily performed.
[0018]
An outer peripheral holding member 36 is attached to the insulating member 24a on the yoke side, and an inner peripheral holding member 37 is attached to the inner peripheral side in which the rotor is accommodated. The outer peripheral side holding member 36 and the inner peripheral side holding member 37 are formed of a conductive member, and an outer peripheral side holding portion 27 and an inner peripheral side holding portion 29 for holding the ends of the windings 25 are provided. Yes. The outer peripheral side holding portion 27 and the inner peripheral side holding portion 29 include U-shaped receiving portions 41 and 42 having a receiving surface extending toward an annular shaft formed by the stator 21 and having a substantially U-shaped cross section. Forming. In the present embodiment, the winding start portion 26 of the winding 25 is clamped by the holding portion 27 of the outer peripheral side holding member 36, and the winding end portion 28 of the winding 25 is clamped by the holding portion 29 of the inner peripheral side holding member 37. As is done, a winding 25 is applied. Details will be described later. Further, the outer peripheral holding member 36 is formed in a substantially symmetrical shape, and a U-shaped receiving portion 44 is also formed at the end opposite to the end where the U-shaped receiving portion 41 is formed. . As a result, the winding start portion 26 of the winding 25 can be held between the U-shaped receiving portions 44.
[0019]
The inner peripheral holding member 37 includes a conductive wire holding part 31. The conductor holding part 31 is formed with a U-shaped receiving part 43 having a substantially U-shaped cross section like the inner peripheral holding part 29 so that the periphery of a neutral point connecting conductor 30 to be described later can be clamped. . The conductor holding portion 31 is attached to the teeth 22 and is closer to the side where the rotor is located than the inner peripheral side holding portion 29, and the extending direction of the receiving surface of the U-shaped receiving portion 43 is the stator 21. The conductor holding portions 31 that are arranged so as to be parallel to the circumferential direction of the annular ring formed by each of the teeth 22 are arranged so that the virtual connection line connected between the open ends of the adjacent conductor holding portions 31 and 31 forms an arc. It is arranged so as to form. Since the outer peripheral side holding portion 27 and the inner peripheral side holding portion 29 described above are respectively provided on one surface of the stator 21, as will be described in detail later, the winding 25 and the neutral point connecting conductor 30 are fitted. It is possible to perform caulking and welding operations from the same direction. Further, in the present embodiment, as shown by the arrow P in FIG. 3, the inner peripheral side holding member 37 is formed by bending the U-shaped receiving portion 43 side in the outer peripheral side holding member 36. Is possible and is improving productivity.
[0020]
As shown in FIG. 3, the windings 25 are applied to the teeth 22 by the nozzles 33 as shown in FIG. 1 with the insulating member 24 having the holding members 36 and 37 attached thereto. . As shown in detail in FIG. 2, the nozzle 33 is formed in a substantially rectangular tube shape, and its tip end portion is slightly tapered. A groove extending in the longitudinal direction is formed on one side surface of the nozzle 33, and a conducting wire can be fed out from the tip of the groove. Further, the nozzle 33 is provided with a cutting mechanism (not shown) so that the lead wire fed from the tip of the nozzle 33 can be cut by this cutting mechanism.
[0021]
The winding process is performed for each tooth 22. First, the winding start portion 26 of the winding 25 is passed through the U-shaped receiving portion 41 of the outer peripheral holding portion 27 provided at the outer peripheral end portion of the insulating member 24, and the U-shaped receiving portion 41 is moved in this state. By crimping, the conducting wire forming the winding 25 is fixed to the outer peripheral holding member 36. Next, the conductive wire fixed on the outer peripheral side is wound a predetermined number of times so as to be wound around the peripheral surface of the insulating member 24. Then, the winding end portion 28 of the conducting wire is passed through the U-shaped receiving portion 42 of the inner peripheral holding member 37, and the winding end portion 28 of the conducting wire is held on the inner peripheral side by caulking the U-shaped receiving portion 42 in this state. It fixes to the member 37 and the terminal of this winding end part 28 is cut | disconnected.
[0022]
Further, the nozzle 33 is moved to the next tooth 22, and the winding process described above is sequentially repeated for each tooth 22. As shown in FIG. 1, the windings 25 applied to the respective teeth 22 are sequentially turned into U-phase, V-phase, and W-phase windings 25U, 25V, and 25W counterclockwise. It is connected to a corresponding power collection / distribution ring (not shown) and is connected to an external device through this power collection / distribution ring.
[0023]
Then, when the winding process is performed on the last remaining tooth 22, unlike the process in the other teeth 22, the wire that has formed the winding 25 is cut after the caulking process in the inner peripheral holding portion 29. Without forming the neutral point connecting lead 31 by wiring the U-shaped receiving part 43 of the lead holding part 31 of the inner peripheral side holding member 37 through all the teeth 22. In this state, each of the U-shaped receiving portions 43 is caulked to fix the neutral point connecting lead 31.
[0024]
As described above, since the lead wire holding portion 31 and the inner peripheral side holding portion 29 are formed as an integral member, the winding 25 applied to each tooth 22 and the neutral point connecting lead wire 30 are securely connected. Can be neutral point connection. For this reason, even if it does not connect the coil | winding 25 given for each tooth | gear 22 to the neutral point connection conducting wire 30 directly respectively, neutral point connection can be performed reliably and manufacture is performed easily. As well as improved reliability.
[0025]
Furthermore, in the present embodiment, the following steps are included in order to make electrical connection more complete. The stator 21 that has completed the winding process is conveyed to an energization processing apparatus (not shown). In the energization processing step, a set of electrodes (not shown) is applied so as to sandwich each of the crimped U-shaped receiving portions 41 to 43, and a current of about 10 kA × 1 sec is applied to the U-shaped receiving portions 41 to 43. To the winding start portion 26 and the winding end portion 28 of the winding 25 and the neutral point connecting conductor 30. The insulating coating thus coated is burned off and the conductive materials of the end portions 26 and 28 of the winding 25 and the neutral point connecting conductor 31 are welded to the U-shaped receiving portions 41 to 43, respectively. To make electrical connection.
[0026]
According to the above-described embodiment of the present invention, since the conductive wire used when configuring the winding is used for the neutral point connecting conductor, the member for neutral point connection is There is no need to punch and manufacture a plate material as in the prior art, and the material yield can be greatly improved. Further, as described above, if the winding is performed sequentially for each tooth, and the winding applied to the last remaining tooth is drawn in an annular shape to form the neutral point connecting wire 30, the processing process is easy. Although it is preferable, it is not limited to this form.
[0027]
FIG. 4 is an explanatory diagram of the stator 50 according to the second embodiment of the present invention. In addition, about the structural member similar to 1st Embodiment, the same number is attached | subjected and the description is abbreviate | omitted suitably. In the present embodiment, after the windings 25 are applied to the respective teeth 22, the neutral point connection conducting wires 52, which are members different from the respective windings 25, are fitted into the conducting wire holding portion 31, so as to be substantially annular. They are attached by drawing and are connected by connecting members 51 that electrically connect both ends thereof. Even with such a configuration, as in the first embodiment, the material yield can be improved as compared with the conventional case, and the neutral point connection can be reliably performed.
[0028]
According to the above-described embodiment of the present invention, since the wire for forming the winding is used as it is as a member for neutral point connection, there is no need to punch and manufacture a plate material as in the prior art. The material yield can be greatly improved. Moreover, since the said conductor holding part 31 is integrally formed in the inner peripheral side holding | maintenance part 29 which is the said electroconductive member, the winding which is performed for every teeth 22 and is hold | maintained in the said inner peripheral side holding | maintenance part 29 is carried out. Each of the wires 25 is reliably electrically connected to the neutral point connecting lead wire 30 held by the conductive holding portion 31. For this reason, even if it does not solder-connect the coil | winding 25 given for each tooth | gear 22 to the neutral point connection conducting wire 30 individually, neutral point connection can be performed reliably and manufacture is performed easily. As well as improved reliability.
In addition, according to the above-described embodiment of the present invention, since the neutral point connection can be performed by the winding 25 wound around the tooth 22, the number of parts can be reduced and the productivity can be improved. it can.
[0029]
According to the above-described embodiment of the present invention, the winding 25 is applied to each tooth 22, and the neutral point connecting wire 30 is formed in an annular shape so as to be electrically connected to each winding 25. Since a neutral point connection can be performed by drawing, a manufacturing process becomes easy. In particular, if the windings are sequentially applied to each of the teeth 22 and the winding 25 applied to the last remaining tooth 22 is drawn in an annular shape to form the neutral point connecting wire 30, the treatment process is easy. Therefore, it is preferable.
[0030]
As mentioned above, although this invention was demonstrated based on embodiment, the content of this invention is not restricted to this. For example, in the above-described embodiment, the case where the stator 21 in which the teeth 22 and the yoke portion 23 are integrated has been described. However, the present invention is not limited to this, and the teeth 22 and the yoke portion 23 are divided. Possible stators may be used. In the embodiment, the insulating member 24 is formed by a pair of bobbin-shaped insulating members 24a and 24b. However, the insulating member 24 may be formed in a sheet shape and wound around the teeth.
Further, in the above embodiment, the inner rotor type stator in which the rotor is loosely inserted into the stator and the motor is configured has been described. However, the present invention can also be applied to an outer rotor type motor. is there. At this time, in order to simplify the structure of the motor, the neutral point connecting lead wire is configured to connect the outer peripheral side holding members in the case of the rotor side of the teeth, that is, the outer rotor type stator. Is preferred.
[0031]
【The invention's effect】
As described above, according to the stator of the present invention, the material yield can be improved.
[0032]
Further, according to the method for manufacturing a stator of the present invention, it is possible to shorten the lead time required for manufacturing the stator.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a stator and a manufacturing method thereof according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of the stator of FIG.
FIG. 3 is an exploded view of the stator of FIG. 1;
FIG. 4 is an explanatory diagram of a stator according to a second embodiment of the present invention.
FIG. 5 is an explanatory view showing a conventional stator and a manufacturing method thereof.
FIG. 6 is an explanatory diagram showing a conventional problem.
[Explanation of symbols]
20 Stator 22 Teeth 23 Yoke part 24 Insulation member 25 Winding 26 Winding start part 27 Outer peripheral side holding part 28 Winding end part 29 Inner peripheral side holding part 30 Neutral point connecting lead 31 Conductor holding part 41 to 43 U-shaped Receiving part

Claims (7)

A plurality of teeth extending in the radial direction and arranged in the circumferential direction, a yoke portion connecting the plurality of arranged teeth, and a stator winding made of a conductive wire wound around each of the teeth And an insulating member disposed between the teeth and the stator winding,
The insulating member has a conductive outer peripheral side holding member and an inner peripheral side holding member on the inner side and the outer side as seen from the stator,
The stator winding is fixed in the outer peripheral side holding member and the inner peripheral side holding member, respectively, for a part of the conductive wire extending from the winding part,
The inner peripheral holding member has a conductor holding portion, a U-shaped receiving portion is formed in the conductor holding portion, and the extending direction of the receiving surface of the U-shaped receiving portion is an annular ring formed by the stator. Are arranged so as to be parallel to the circumferential direction, and the virtual connection lines connected between the open ends of the adjacent conductor holding parts are arranged to form an arc,
Further, the U-shaped receiving portion of the inner peripheral holding member is electrically connected by a conductive wire for neutral point connection of the stator winding,
The outer peripheral side holding member is electrically connected to each other with respect to the plurality of stator windings distinguished for each predetermined phase . The U-shaped receiving portion of the inner peripheral holding member is electrically connected by a conductive wire made of the same type of member as the wire constituting the stator winding for connecting a neutral point of the stator winding. The stator according to claim 1, wherein the stator is connected to each other. The U-shaped receiving portion of the inner peripheral holding member is configured such that the conductive wire continuous with one of the stator windings is connected to the other stator windings at a neutral point. 2. The stator according to claim 1, wherein the stator is electrically connected by a neutral point connecting wire formed by routing the U-shaped receiving portions of the plurality of inner peripheral holding members. . A plurality of teeth extending in the radial direction and arranged in the circumferential direction, a yoke portion connecting the plurality of arranged teeth, and a stator winding made of a conductive wire wound around each of the teeth If, between the tooth and the insulating member disposed between the stator windings, and electrically connected to conductor neutral point connection that connects a neutral point of a plurality of the stator winding, wherein A conductive holding member that holds the conductive wire disposed on the outer side and the inner side when viewed from the radial direction of the stator with respect to the insulating member,
The inner holding member has a conductor holding portion, a U-shaped receiving portion is formed in the conductor holding portion, and the extending direction of the receiving surface of the U-shaped receiving portion is a circle formed by the stator. A method of manufacturing a stator that is arranged so as to be parallel to a circumferential direction of a ring and in which virtual connection lines connected between open ends of adjacent conductor holding parts are arranged to form an arc ,
The holding member is arranged on the outer side and the inner side when viewed from the radial direction of the stator with respect to the insulating member, and one end of the conductive wire is fixed to one of the holding members, and the conductive A winding forming step of fixing the wire by the other holding member to form the stator winding;
A continuous conductive wire is passed through the U-shaped receiving portion and fixed by a plurality of holding members on the inner side, and the conductive wire and the holding member are electrically connected to connect the neutral point. A neutral point connecting step for forming a conductive wire;
A method of manufacturing a stator, comprising: 5. The stator according to claim 4 , wherein after the winding forming process is finished, the process moves to the neutral point connecting process without cutting the conductive wire fixed by the holding member on the inner side . Production method. 6. The method of manufacturing a stator according to claim 4, wherein the winding forming step performs winding after the conductive wire is held by the holding member between the yoke portions. In the neutral point connecting step, the electrical connection between the holding member and the conductive wire is performed by electric welding by applying a current to the contact interface between the holding member and the conductive wire. The method for manufacturing a stator according to any one of claims 4 to 6 , wherein the stator is manufactured.

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