JP2019050670A - Stator structure and resolver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the mountability to a rotary electric machine. The stator structure of the embodiment includes a stator core, an insulator, a coil, and a coil cover. The stator core has an annular main body and a plurality of teeth extending radially from the main body. The insulator covers a plurality of teeth from both sides in the axial direction of the stator core. The coil is wound around each of the plurality of teeth via an insulator. The coil cover covers the coil. The insulator has a plurality of terminals. The coil cover has a plurality of wires and a lead wire holding portion in which the lead wire is inserted from one side in the axial direction and connected to one end of the wire. The lead wire holding portion is on the main body portion of the stator core and is arranged on one side in the axial direction. The terminal has a entwined portion in which the ends of the windings constituting the coil are entwined and a connecting portion connected to the other end of the wiring, and is provided on the side where the teeth extend from the main body portion of the stator core. [Selection diagram] Fig. 1

Description

  The present invention relates to a stator structure and a resolver.

  BACKGROUND Conventionally, resolvers that detect the rotation angle of a rotating electrical machine such as a motor or a generator are known. The resolver includes, for example, a stator core including a plurality of teeth extending from the inner circumferential side of the annularly formed main body toward the center, and a rotor disposed so as to face the plurality of teeth inside the stator core. Prepare. In addition, a winding is wound around the teeth via an insulator, and the winding is entangled at one end of the terminal. Then, the other end of the terminal is disposed so as to extend to the lead wire holding portion, and the lead wire holding portion is connected to a lead wire wired from the external device (see, for example, Patent Document 1).

Unexamined-Japanese-Patent No. 2006-107869

  However, in the prior art, since the lead wire holding portion is provided so as to project outward from the outer peripheral side of the stator core, the outer diameter of the resolver becomes large, and there is a possibility that dimensional constraints may occur when attaching to the rotating electric machine. there were.

  This invention is made in view of the above, Comprising: It aims at providing the stator structure and resolver which can improve the attachment nature to a rotating electrical machine.

In order to solve the problems described above and to achieve the object, a stator structure according to an aspect of the present invention includes a stator core, an insulator, a coil, and a coil cover. The stator core has an annular main body, and a plurality of teeth radially extending from the main body. The insulator covers the plurality of teeth from both axial sides of the stator core. The coil is wound around each of the plurality of teeth via the insulator. The coil cover covers the coil. The insulator has a plurality of terminals. The coil cover has a plurality of wires and a lead wire holding portion in which a lead wire is inserted from one side in the axial direction and connected to one end of the wire. The lead wire holding portion is disposed on the main body portion of the stator core and on the one side in the axial direction. The terminal has a winding portion where the end of the winding constituting the coil is wound, and a connection portion connected to the other end of the wire, and the teeth extend from the main body portion of the stator core Provided on the

  According to one aspect of the present invention, the attachment to a rotating electrical machine can be improved.

FIG. 1 is a perspective view showing the configuration of the stator structure according to the embodiment. FIG. 2 is a perspective view showing the configuration of the coil cover according to the embodiment. Drawing 3 is a perspective view showing the composition of wiring in a coil cover concerning an embodiment. FIG. 4 is a perspective view showing a state before the coil cover is assembled in the stator structure according to the embodiment. FIG. 5 is a diagram for describing the detailed structure of the terminal according to the embodiment.

  Hereinafter, a stator structure and a resolver according to an embodiment will be described with reference to the drawings. The application of the stator structure and the resolver is not limited by the embodiments described below. In addition, it should be noted that the drawings are schematic, and the relationship between dimensions of each element, the ratio of each element, and the like may differ from reality. Furthermore, even between the drawings, there may be portions where dimensional relationships and proportions differ from one another.

  First, details of the stator structure 1 according to the embodiment will be described with reference to FIG. FIG. 1 is a perspective view showing the configuration of a stator structure 1 according to the embodiment.

  The resolver according to the embodiment can be obtained by providing a rotor (not shown) inside the stator structure 1 shown in FIG. The resolver according to the embodiment is a VR (Variable Reluctance) resolver, and the rotor is fixed to the output shaft of the rotating electrical machine, and rotates with the rotation of the output shaft. Thereby, the rotation angle of the output shaft of a rotary electric machine can be detected.

  As shown in FIG. 1, the stator structure 1 includes a stator core 10, an insulator 20, a coil (not shown), and a coil cover 30.

  The stator core 10 has a laminated structure in which a plurality of steel plates such as electromagnetic steel plates are laminated. The stator core 10 has a main body 11 and a plurality of teeth 12. The main body portion 11 is annular, and in the embodiment is annular. The plurality of teeth 12 extend from the inner peripheral side of the main body portion 11 toward the center of the main body portion 11 (that is, in the radial direction).

  In the following, as shown in FIG. 1, the radial direction, the axial direction, and the circumferential direction of the stator core 10 will be defined and described. Here, the “radial direction” is a direction orthogonal to the rotation axis of the rotor rotating inside the stator core 10, and the “axial direction” is a direction coincident with the axial direction of the rotation axis of the rotor The "circumferential direction" is a direction coincident with the rotational direction of the rotor.

  The insulator 20 is an insulating member, and is formed, for example, by injection molding of an insulating resin. The insulator 20 is composed of a first insulator 21 and a second insulator 22. The stator core 10 is covered with the first insulator 21 and the second insulator 22 from both sides in the axial direction.

  Further, the first insulator 21 has a plurality of terminal holding portions 21 a and a plurality of (six in the embodiment) terminals 23-1 to 23-6 held by the terminal holding portions 21 a. In the following, when the terminals 23-1 to 23-6 are generically referred to, they may be referred to as "terminals 23".

  The terminal 23 is a conductive member such as metal. For example, the terminal holding portion 21a is formed integrally with the first insulator 21, and the terminal 23 is insert-molded so as to be embedded in the terminal holding portion 21a.

  The terminal holding portion 21 a and the terminals 23-1 to 23-6 held by the terminal holding portion 21 a are provided between the adjacent teeth 12. Furthermore, the terminals 23-1 to 23-6 are alternately provided with the teeth 12, and when the stator structure 1 is viewed from the top, the terminals 23-1 to 23-3 and the lead wire holding portion 32 described later are used as a reference. The terminals 23-4 to 23-6 are arranged symmetrically to the left and right.

  A coil (not shown) is wound around each of the plurality of teeth 12 via the insulator 20. Such a coil is composed of an excitation winding and an output winding. Further, the output winding of the coil is composed of a sin phase output winding that outputs a sin phase output signal and a cos phase output winding that outputs a cos phase output signal.

  The coil cover 30 is a cover that covers the coil wound around the teeth 12 from one side in the axial direction of the stator core 10 and protects the coil. The details of the coil cover 30 will be described with reference to FIGS. 2 and 3. FIG. 2 is a perspective view showing the configuration of the coil cover 30 according to the embodiment, and FIG. 3 is a perspective view showing the configuration of the wirings 31-1 to 31-6 in the coil cover 30 according to the embodiment.

  As shown in FIG. 2, the coil cover 30 has an annular main body 30 a. The main body portion 30a is made of an insulating resin or the like and is formed by injection molding. In addition, the coil cover 30 has a plurality of (six in the embodiment) wires 31-1 to 31-6 and a lead wire holding portion 32.

  The wires 31-1 to 31-6 are provided along the circumferential direction so as to be embedded inside the main body 30 a of the coil cover 30. Further, in the wires 31-1 to 31-6, the wires 31-1 to 31-3 and the wires 31-4 to 31-6 are arranged symmetrically with respect to the lead wire holding portion 32 in the left-right direction. In the following, when the wires 31-1 to 31-6 are generically referred to, they may be referred to as "wires 31".

  The lead wire holding portion 32 extends from the main body portion 30 a of the coil cover 30 to one side (upper side in the drawing) in the axial direction. A plurality of hole-like insertion portions 32 a are formed in the lead wire holding portion 32, and lead wires (not shown) extending from an external device are inserted and held in the insertion portions 32 a.

  Here, since the ends 31a-1 to 31a-6 of the wires 31-1 to 31-6 shown in FIG. 3 are exposed and provided in the insertion portion 32a, the lead wire is inserted into the insertion portion 32a. Thus, the lead wires can be electrically connected to the wirings 31-1 to 31-6.

  For example, as shown in FIG. 3, since the ends 31a-1 to 31a-6 of the wirings 31-1 to 31-6 are flat lands, the lead wire is resistance-welded to the ends 31a-1 to 31a-6. Thus, the lead wires can be electrically connected to the wirings 31-1 to 31-6.

  Moreover, the recessed part is formed in the other end 31b-1 to 31b-6 of the wiring 31-1 to 31-6, and the connection part 23a of the several terminal 23 which the wiring 31-1 to 31-6 mentions later by this recessed part -1 to 23a-6.

  Subsequently, an assembling process of the coil cover 30 will be described with reference to FIGS. 4 and 5. FIG. 4 is a perspective view showing a state before the coil cover 30 is assembled in the stator structure 1 according to the embodiment.

  As shown in FIG. 4, after the coil (not shown) is wound around the plurality of teeth 12, the coil cover 30 is mounted on the insulator 20 so as to cover the side where the connection portions 23 a-1 to 23 a-6 of the terminals 23 project. It is assembled.

  Here, as shown in FIG. 4, the connection portions 23 a-1 to 23 a-6 of the terminal 23 are provided at positions corresponding to the other ends 31 b-1 to 31 b-6 of the wiring 31 provided on the coil cover 30. Therefore, according to the embodiment, by assembling the coil cover 30 to the insulator 20, the connection portions 23a-1 to 23a-6 of the terminals 23 and the other ends 31b-1 to 31b-6 of the corresponding wires 31 are connected. can do.

  FIG. 5 is a diagram for describing the detailed structure of the terminal 23 according to the embodiment, and is a perspective view in which the vicinity of the terminal 23-2 among the plurality of terminals 23 is enlarged.

  The terminal 23 is substantially U-shaped, and includes a connection portion 23a and a binding portion 23b. The connection portion 23a is provided at the end portion on the inner peripheral side of the terminal 23, and is connected to the other ends 31b-1 to 31b-6 of the corresponding wiring 31 as described above. The entwined portion 23 b is provided at the end on the outer peripheral side of the terminal 23, and the end of the winding constituting the corresponding coil is entangled. Then, by applying TIG (Tungsten Inert Gas) welding, for example, to the tangled portion 23b where the ends of the winding are tangled, the winding and the tangled portion 23b can be electrically connected.

  For example, the winding end of the excitation winding is wound on the winding portion 23b of the terminal 23-1, and the winding end of the cos phase output winding is wound on the winding portion 23b of the terminal 23-2. The winding start of the cos phase output winding is entangled in the entangled portion 23b of the terminal 23-3.

  In addition, the winding start of the sin phase output winding is wound around the winding portion 23b of the terminal 23-4, and the winding end of the sin phase output winding is winding around the winding portion 23b of the terminal 23-5. The start of the winding of the excitation winding is entangled in the entangled portion 23b of the terminal 23-6.

  The example shown here is merely an example, and any one of the excitation winding, the sin phase output winding, and the cos phase output winding is wound on the winding portion 23b of the terminals 23-1 to 23-6. It should be done.

  As described above, by assembling the coil cover 30 to the insulator 20, the connection portion 23a of the terminal 23 and the other end 31b-1 to 31b-6 of the corresponding wiring 31 can be connected. Thus, the terminal end of the winding forming the coil and the lead wire held by the lead wire holding portion 32 can be electrically connected via the terminal 23 and the wire 31.

  Here, in the embodiment, as shown in FIG. 1 and the like, the lead wire holding portion 32 is disposed on the main body portion 11 of the stator core 10. In the embodiment, as shown in FIG. 5 and the like, the wire 31 is provided so as to be embedded in the coil cover 30, and the terminal 23 extends from the main body 11 of the stator core 10 to the tooth 12 (in the embodiment Provided on the inside). Thereby, the lead wire holding portion 32, the wire 31, and the terminal 23 can be suppressed from protruding outward from the main body portion 11 of the stator core 10 in the radial direction.

  Furthermore, in the embodiment, a plurality of lead wires are inserted from one side (upper side in the figure) of the insertion portion 32a in the axial direction. As a result, the plurality of lead wires can be suppressed from protruding outward in the radial direction from the main body portion 11 of the stator core 10.

  That is, in the embodiment, since the respective constituent members and the lead wires of the stator structure 1 can be suppressed from protruding outward in the radial direction from the main body portion 11 of the stator core 10, the diameter of the stator structure 1 can be reduced. it can. Therefore, according to the embodiment, since the dimensional restriction when attaching to the rotating electrical machine can be reduced, the attachability to the rotating electrical machine can be improved.

  Further, in the embodiment, as shown in FIG. 1 and the like, the terminal 23 is provided between the adjacent teeth 12. Thereby, since the gap formed between the adjacent teeth 12 can be effectively used, according to the embodiment, the stator structure 1 can be further reduced in diameter.

  Although the embodiment shows an example in which one terminal 23 is disposed between adjacent teeth 12, the number of terminals 23 disposed between adjacent teeth 12 is not limited to one. A plurality of terminals 23 may be disposed between adjacent teeth 12.

  In the embodiment, as shown in FIG. 5, it is preferable that both the connecting portion 23a of the terminal 23 and the binding portion 23b extend on one side in the axial direction (the upper side in the figure). Thereby, it can suppress that the connection part 23a and the binding part 23b protrude outside the radial direction from the main-body part 11 of the stator core 10. As shown in FIG. Therefore, according to the embodiment, the stator structure 1 can be further reduced in diameter.

  In the embodiment, the terminal 23 is formed in a substantially U shape, and the connection portion 23a and the binding portion 23b are extended in the same direction. However, the shape of the terminal 23 is limited to such an example. I can not. For example, the terminal 23 may be formed in a bar shape, and the connection portion 23a and the binding portion 23b may extend to one side and the other side in the axial direction.

  In the embodiment, as shown in FIG. 5, the pair of connecting pins 24 may be formed to be adjacent to the binding portion 23 b. When relaying the path of the end wire of the winding between the winding portion 23 b and the coil wound around the teeth 12 by the transition pin 24, an appropriate tension is applied between the winding portion 23 b and the coil. The end line of the winding can be handed over.

  In the embodiment, as illustrated in FIG. 2 and the like, the wirings 31-1 to 31-3 and the wirings 31-4 to 31-6 are arranged symmetrically with respect to the lead wire holding portion 32 in the left-right direction. That is, in the embodiment, the wires 31-1 to 31-6 are equally wired on both sides from the lead wire holding portion 32.

  Thus, the wires 31-1 to 31-6 can be embedded in the coil cover 30 without increasing the width of the coil cover 30 in the radial direction. Therefore, according to the embodiment, since the coil cover 30 can be prevented from protruding outward in the radial direction, the stator structure 1 can be further reduced in diameter.

  On the other hand, if the width in the radial direction of the coil cover 30 is relatively large, the wires 31-1 to 31-6 may not necessarily be equally wired on both sides from the lead wire holding portion 32. For example, four wires 31 may be formed on one side from the lead wire holding portion 32 and two wires 31 may be formed on the other side, or five wires 31 may be formed on one side from the lead wire holding portion 32. One wire 31 may be formed on the other side, or all six wires 31 may be formed on one side from the lead wire holding portion 32.

  In the embodiment, as shown in FIG. 2 and the like, in the lead wire holding portion 32, the plurality of insertion portions 32a are formed in line in a straight line. Thereby, when resistance welding of the lead wire to one end 31a-1 to 31a-6 of the wires 31-1 to 31-6 in the insertion portion 32a, the electrodes used for such resistance welding are one end 31a-1 to 31a- It can be easily applied to 6.

  Therefore, according to the embodiment, the workability at the time of assembling the lead wire to the stator structure 1 can be improved.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning. For example, although the embodiment shows an example in which the insulator 20 is divided into the first insulator 21 and the second insulator 22, the insulator 20 may be formed by insert molding so that the stator core 10 is embedded inside. .

  In the embodiment, an example is shown in which the coil is covered and protected from one side in the axial direction by the coil cover 30, but another coil cover is further provided to cover the coil from the other side in the axial direction. May be protected from both sides of the Furthermore, although the case where the present invention is applied to the inner rotor type resolver is described in the embodiment, the present invention may be applied to an outer rotor type resolver.

  As described above, the stator structure 1 according to the embodiment includes the stator core 10, the insulator 20, the coil, and the coil cover 30. The stator core 10 has an annular main body 11 and a plurality of teeth 12 radially extending from the main body 11. The insulator 20 covers the plurality of teeth 12 from both axial sides of the stator core 10. The coil is wound around each of the plurality of teeth 12 via the insulator 20. The coil cover 30 covers the coil. The insulator 20 has a plurality of terminals 23. The coil cover 30 has a plurality of wires 31 and lead wire holding portions 32 in which lead wires are inserted from one side in the axial direction and connected to one end 31 a-1 to 31 a-6 of the wires 31. The lead wire holding portion 32 is located on the main body portion 11 of the stator core 10 and is disposed on one side in the axial direction. The terminal 23 has a winding portion 23b in which the end of the winding constituting the coil is wound, and connection portions 23a-1 to 23a-6 connected to the other ends 31b-1 to 31b-6 of the wiring 31. And is provided on the side where the teeth 12 extend from the main body portion 11 of the stator core 10. Thereby, the attachment property to a rotary electric machine can be improved.

  Further, in the stator structure 1 according to the embodiment, the terminal 23 is provided between the adjacent teeth 12. Thereby, the diameter of the stator structure 1 can be further reduced.

  Further, in the stator structure 1 according to the embodiment, the winding portion 23b of the terminal 23 and the connection portion 23a extend on one side in the axial direction. Thereby, the diameter of the stator structure 1 can be further reduced.

  Moreover, the resolver according to the embodiment includes a rotor and the above-described stator structure 1. Thereby, the resolver which improved the attachment property to a rotary electric machine is realizable.

  Further, the present invention is not limited by the above embodiment. What is configured by appropriately combining the above-described constituents is also included in the present invention. Further, further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspects of the present invention are not limited to the above embodiment, and various modifications are possible.

  DESCRIPTION OF SYMBOLS 1 Stator structure, 10 Stator core, 11 body part, 12 teeth, 20 insulator, 21 1st insulator, 22 2nd insulator, 23, 23-1 to 23-6 terminal, 23a, 23a-1 to 23a-6 connection portion, 23b Tangled part, 24 transition pin, 30 coil cover, 30a main body part, 31, 31-1 to 31-6 wiring, 31a-1 to 31a-6 one end, 31b-1 to 31b-6 other end, 32 lead wire Holding part, 32a insertion part

Claims (4)

A stator core having an annular main body and a plurality of teeth radially extending from the main body;
Insulators covering the plurality of teeth from both sides in the axial direction of the stator core;
A coil wound around each of the plurality of teeth via the insulator;
A coil cover covering the coil;
Equipped with
The insulator has a plurality of terminals,
The coil cover has a plurality of wires and a lead wire holding portion in which a lead wire is inserted from one side in the axial direction and connected to one end of the wire.
The lead wire holding portion is disposed on the main body portion of the stator core and on the one side in the axial direction.
The terminal has a winding portion where the end of the winding constituting the coil is wound, and a connection portion connected to the other end of the wire, and the teeth extend from the main body portion of the stator core Stator structure provided on the   The stator structure according to claim 1, wherein the terminal is provided between adjacent teeth.   The stator structure according to claim 1, wherein the winding portion of the terminal and the connection portion extend to the one side in the axial direction. With the rotor,
The stator structure according to any one of claims 1 to 3.
, A resolver.

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