JP6566882B2 - Stator and rotating electric machine equipped with the stator - Google Patents

Description

  The present invention relates to a stator and a rotating electrical machine including the stator.

  As an insulator to be attached to a stator core of a conventional electric motor, there is an end holder that is fitted to each of both ends of the stator core and the teeth part, and the end part attached to the side surface of the tooth part is an end holder. The coil holders are recessed in the end holder and the side part, respectively, and both ends of the side part are sandwiched by locking claws extending from the end holder. (For example, refer to Patent Document 1).

JP 2007-252030 A

  However, since the technique disclosed in Patent Document 1 is configured such that both ends of the side portion are sandwiched between the pair of end holders by the locking claws, the side portion and the end holder are assembled when attaching to the stator core. Therefore, it becomes an obstacle to assembling workability, and the productivity is lowered and the cost is increased. In addition, there is a problem in that the withstand voltage characteristic between the stator core and the coil in the engaging claw portion is deteriorated.

  The present invention has been made to solve the above-described problems, and includes an insulator capable of improving workability when attached to an iron core, and a magnetic pole having improved insulation characteristics between the coil and the iron core. It aims at providing the rotary electric machine provided with the stator provided with the stator.

The present invention is a stator in which a plurality of magnetic poles formed by an insulator and a coil attached to an iron core are arranged in a frame, and the insulator is fused to a first frame portion and a second frame portion. Consists of connected sheet insulation, and in the axial direction of the iron core, the first frame part is in direct contact with the iron core, the first frame part on one end surface part provided with mounting holes As well as
The first frame portion is provided on the iron core with a protrusion provided on the end face plate being inserted into a mounting hole of the iron core via a fixing hole provided on one end in the longitudinal direction of the sheet insulation. It is a stator in which insulation is provided in direct contact with the side surface of the iron core, and a magnetic pole is formed by winding a coil on the insulator.

According to another aspect of the present invention, there is provided a stator in which a plurality of magnetic poles formed of an insulator and a coil attached to an iron core are arranged in a frame, and the insulator is connected to the first frame portion and the second frame portion. The sheet insulation is made, and the first frame portion is provided on one end surface portion in the axial direction of the iron core and the second frame portion is provided on the other end surface portion in direct contact with the iron core, and
Sheet insulation is provided in direct contact with the side of the iron core,
The first frame part and the second frame part are resin molded products provided with a front end flange, a yoke part flange, and an end face plate connecting between the front end flange and the yoke part flange, and the width of the sheet insulation. The dimensions are the same as the dimensions between the tip flange and the yoke flange,
The width dimension of the end face plate is smaller than the width dimension of the iron core on one side by a predetermined value, and sheet insulation is formed on both side faces of the end face board in the width direction so as to protrude away from the end face portion of the iron core in the axial direction. Have
This is a stator in which a coil is wound around an insulator and fixed to form a magnetic pole.

  Since the present invention is a stator including the magnetic poles having the above-described configuration, when manufacturing the magnetic poles, the work of attaching an insulator to the iron core is easy and simplified, improving productivity and reducing manufacturing costs. As well as being peeled off, the ground insulation characteristics between the coil and the iron core are improved, making it suitable for higher voltage.

FIG. 3 is a diagram showing a stator according to the first embodiment. FIG. 3 is a diagram showing a stator according to the first embodiment. It is a figure which shows the insulator and iron core by Embodiment 1. FIG. It is a figure which shows the insulator and iron core by Embodiment 1. FIG. It is a figure which shows attachment of an insulator to the iron core by Embodiment 1. FIG. It is a figure which shows attachment of an insulator to the iron core by Embodiment 1. FIG. It is a figure which shows attachment of an insulator to the iron core by Embodiment 1. FIG. FIG. 3 is a diagram showing coil winding according to the first embodiment. It is a figure which shows the state which attached the insulator by Embodiment 2 to the iron core. 6 is a cross-sectional projection view showing a state in which sheet insulation is attached to an end face plate according to Embodiment 2. FIG. It is a figure which shows the state which covers the coil surface by Embodiment 2 with the sheet insulation extended.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a stator 1 of a rotating electrical machine, and FIG. 2 is an XX cross-sectional view showing an axial direction of the stator 1 of FIG. In the figure, the stator 1 is configured by tightening and connecting a plurality of magnetic poles 3 arranged on the circumference and shrink-fitting or press-fitting the frame 2. The magnetic pole 3 includes an iron core 4 and a coil 6 in which an insulator 5 is attached to the iron core 4 and then a conductor is wound a plurality of times. The insulator 5 has electrical insulation between the iron core 4 and the coil 6 and a function of a winding frame for winding the coil 6 in a predetermined position. The iron core 4 is provided with a tip portion 4A facing the armature of a rotating electric machine (not shown) and a yoke portion 4B joined to the adjacent iron core 4. Note that the iron core 4 is formed by punching a thin plate and then laminating and fixing to a predetermined iron core length (axial length) with caulking or an adhesive.

  Next, the insulator 5 will be described based on the perspective view shown in FIG. FIG. 3 is a view showing a state before the insulator 5 for one pole of the magnetic pole 3 is attached to the iron core 4. FIG. 4 is a diagram showing stacked iron cores. Here, when the insulator 5 is one unit as shown in FIG. 3, a unit in which a plurality of units are continuously connected may be used, and may be cut and divided into one unit when attached to the iron core 4. The insulator 5 includes a sheet insulation 51, a first frame portion 50A, and a second frame portion 50B. The sheet insulation 51 has elasticity and flexibility, and has excellent bendability, for example, electrical insulation of a resin film. The material is used. Further, the first frame portion 50A and the second frame portion 50B have the same size and shape, and a tip end flange 52 positioned on the tip end portion 4A side of the iron core 4 and a yoke portion flange 53 positioned on the yoke portion 4B side of the iron core 4. Between the two flanges, an end face plate 54A is provided on the first frame portion 50A, and an end face plate 54B is provided on the second frame portion 50B. The first frame portion 50A and the second frame portion 50B are resin molded products, and the sheet insulation 51 is fused and connected and fixed thereto. A fixing hole 55 is provided in one end 51A of the sheet insulation 51, and the sheet insulation width WS is the same as the dimension between the front end flange 52 and the yoke flange 53. Further, as shown in FIG. 5 described later, the end face plate 54A is provided with a protrusion 56, and as shown in FIG. 4, one end face portion 4C in the axial direction of the iron core 4 is provided with a blind hole mounting hole 4E. ing. The width B of the end face plates 54A and 54B is the same as the iron core width W, and the pitch P between the end face plates 54A and 54B is the same as the iron core length (length in the axial direction of the iron core) L.

5, 6, and 7 are views showing a state in which the insulator 5 shown in FIG. 3 is attached to the iron core 4, and FIG. 5 shows the state of attachment, but in FIG. 5, the yoke of the second frame portion 50 </ b> B is shown. The part flange 53 is not shown. FIG. 6 shows a state after the insulator 5 is attached. FIG. 7 will be described later.
As shown in FIG. 5, the sheet insulation 51 is disposed on the iron core 4 so that the fixing hole 55 of the end 51 </ b> A and the mounting hole 4 </ b> E of the one end face 4 </ b> C coincide with the axial direction of the iron core 4. The second frame portion 50B is provided on the other end surface portion 4C of the iron core 4 so as to surround the side surface portion 4D so as to be wound around the iron core 4, and the projection 56 provided on the end surface plate 54A of the first frame portion 50A is a sheet. Through the fixing hole 55 of the insulation 51, it is inserted into the mounting hole 4E of the iron core 4, and the insulator 5 is attached to the iron core 4 in direct contact as shown in FIG.
As described above, the insulator 5 is attached in direct contact with the iron core 4 and is firmly fixed to the iron core 4 by the protrusions 56, so that each member constituting the insulator 5 uses an adhesive or the like in the iron core 4. This eliminates the need for resources, saves time, makes installation work easy and can be done in a short time, eliminates the extra work steps required to cure the adhesive, and improves manufacturing productivity.
Further, as shown in FIG. 7, the first frame portion 50 </ b> A and the second frame portion 50 </ b> B have a configuration in which an attachment foot 52 </ b> A is integrally provided on the tip end flange 52 and an attachment foot 53 </ b> A is integrally provided on the yoke portion flange 53. Also good. With this configuration, the attachment legs 52A and 53A are attached with the iron core 4 sandwiched therebetween, so that a stronger attachment structure is obtained.

  On the insulator 5 attached to the iron core 4, a winding jig 71 is used as shown in FIG. 8, and a conductor 61 is wound around the required number of times to form a coil 6, forming the magnetic pole 3. A stator 1 is formed by being arranged on the individual frame 2.

  As described above, the stator 1 according to the first embodiment is formed by integrating the first frame portion 50A, the second frame portion 50B, and the sheet insulation 51 of the insulator 5 attached to the iron core 4. The ground insulation characteristics between the coil 6 and the iron core 4 are improved. In particular, the terminal portion of the rotating electrical machine (not shown) is provided on the end surface portion 4C of the iron core 4. From this, the winding start and winding end portion of the coil 6 is either the first frame portion 50A or the second frame portion 50B. It is often set near. Since the impulse applied voltage has a maximum value at the winding start portion and winding end portion of the coil 6, the structure in which the first frame portion 50A, the second frame portion 50B, and the sheet insulation 51 are integrated is insulated. There is an excellent effect that resistance can be improved and it can be applied to higher voltage of rotating electrical machines. Further, since the insulator 5 is integrated by the first frame portion 50A, the second frame portion 50B, and the sheet insulation 51, kitting work at the time of manufacturing the magnetic pole 3, that is, necessary components are put together into one box or cart. The work of accumulating can be performed in a short time, and as described above, the assembly to the iron core 4 of the insulator 5 can be easily performed without using an adhesive or the like, so the work time is shortened and the production productivity of the magnetic pole 3 is improved. Cost reduction can be achieved.

Embodiment 2. FIG.
Next, the configuration of the magnetic pole 3 using the insulator 5A according to the second embodiment will be described with reference to FIGS. FIG. 9 is a perspective view showing a state in which the insulator 5 </ b> A is attached to the iron core 4. This insulator 5A is integrated with the sheet insulation 51 of the insulator 5 shown in the first embodiment, and extends toward the outer side of the two side face parts 4D of the iron core 4 so as to extend toward the outer end flange side. The sheet insulation 51 </ b> A and the sheet insulation 51 </ b> B extended on the yoke flange side are provided, and these have the same length as the iron core length L (see FIG. 4) of the iron core 4. Then, as shown in FIG. 10, a sheet insulation 51A extending on the front end flange 52 side is provided along the surface of the coil 6 that does not face the front end flange 52 and the yoke flange 53, and the front end flange 52 side is provided. The extended sheet insulation 51B on the yoke flange 53 side is bent so as to wrap around the extended sheet insulation 51A, and is fixed with a fixing insulating tape or an adhesive (not shown) so as not to separate from each other.
Further, in the second embodiment, the configuration of FIG. 11 showing the AA cross section of FIG. 9 is adopted. 11 shows the end face plate 54C provided on the first frame portion 50A shown in FIG. 3, but the end face plate 54C having the same shape is also provided on the second frame portion 50B. As shown in FIG. 11, the end face plate 54C has a width WE shorter than the iron core width W, and the end face plate width WE ≦ the iron core width W−4 × the sheet insulation thickness T. That is, the width WE of the end face plate 54C is shorter than the width dimension of the iron core 4 on one side by two sheets of the sheet insulation 51 having a thickness T. Because of such a structure of the end face plate 54C, as shown in FIG. 11, the bent portions 51C are formed on the both sides in the width direction of the end face plate 54C of the sheet insulation 51 mounted on the side face portion 4D of the iron core 4. It is formed away from the end face portion 4C so as to protrude in the axial direction.
Since the bent portion 51C as described above is formed, the sheet insulation 51 can prevent interference with the tip flange 52 and the yoke flange 53, and can increase the creeping insulation distance between the coil 6 and the iron core 4. it can. Further, when the magnetic pole 3 according to the second embodiment is installed in the frame 2, as shown in FIG. 1, the insulation characteristic between the coils 6 of different polarities adjacent to each other is improved, and it can be applied as a high voltage rotating electrical machine. There is an effect that the rotating electric machine is provided with the stator 1 having a more stable quality.

  In the second embodiment, in order to attach the insulator 5A to the iron core 4, the projection 56 of the end face plate 54A is inserted into the attachment hole 4E of the iron core 4 similar to the first embodiment. Without adopting this configuration, as shown in FIG. 7, the insulator 5A is attached to the iron core 4 by the coil 6 as a configuration in which the iron core 4 is sandwiched only by the mounting legs 52A and 53A. May be.

  It should be noted that within the scope of the present invention, the embodiments can be freely combined, or the embodiments can be appropriately modified or omitted.

1 Stator, 2 frame, 3 magnetic pole, 4 iron core, 4A tip, 4B yoke,
4C end face part, 4D side face part, 4E mounting hole, 5 insulator, 50A first frame part,
50B 2nd frame part, 51 sheet insulation, 52 tip part flange,
53 Yoke flange, 54A, 54B end face plate, 55 fixing hole, 56 protrusion,
B Width of the end face plate, L Iron core length, W Iron core width.

Claims (9)

A stator in which a plurality of magnetic poles formed by an insulator and a coil attached to an iron core are arranged in a frame, and the insulator includes sheet insulation connected to a first frame portion and a second frame portion; In the axial direction of the iron core, the first frame portion is in direct contact with the iron core on the other end surface portion on one end surface portion where the mounting hole is provided. As well as
The first frame portion is provided in the iron core by a protrusion provided on the end face plate being inserted into a mounting hole of the iron core via a fixing hole provided in one end portion in the longitudinal direction of the sheet insulation. And a stator in which the sheet insulation is provided in direct contact with a side surface portion of the iron core, and the magnetic pole is formed by winding the coil on the insulator. The first frame portion and the second frame portion are resin molded products provided with a front end flange and a yoke flange facing each other, and the end face plate connecting the front end flange and the yoke flange. 2. The stator according to claim 1, wherein a width dimension of the sheet insulation is the same as a dimension between the front end flange and the yoke flange. The width dimension of the end face plate is smaller than the width dimension of the iron core on one side by a predetermined value, and the sheet insulation is separated from both end faces in the width direction of the end face plate so as to protrude from the end face portion of the iron core in the axial direction. The stator according to claim 2, wherein the stator has a bent portion. A stator in which a plurality of magnetic poles formed by an insulator and a coil attached to an iron core are arranged in a frame, and the insulator includes sheet insulation connected to a first frame portion and a second frame portion; The first frame portion is provided on one end surface portion in the axial direction of the iron core and the second frame portion is provided on the other end surface portion in direct contact with the iron core, and
The sheet insulation is provided in direct contact with the side of the iron core;
The first frame portion and the second frame portion are resin molded products provided with a front end flange and a yoke flange facing each other, and an end face plate connecting between the front end flange and the yoke flange. The width dimension of the sheet insulation is the same as the dimension between the tip flange and the yoke flange,
The width dimension of the end face plate is smaller than the width dimension of the iron core on one side by a predetermined value, and the sheet insulation is separated from both end faces in the width direction of the end face plate so as to protrude from the end face portion of the iron core in the axial direction. Has a bent portion formed by
A stator in which the magnetic pole is formed by winding and fixing the coil on the insulator. The sheet insulation is provided with sheet insulation that extends vertically to the outside of the side surface of the iron core, and the surface of the coil that does not face the tip flange and the yoke flange, The stator according to any one of claims 2 to 4, wherein the stator is covered by the extended sheet insulation. The first frame portion and the second frame portion are provided with attachment feet, the attachment feet sandwich the side surface portion of the iron core, and the first frame portion and the second frame portion are attached to the iron core. The stator according to any one of claims 1 to 5, wherein the stator is provided. The stator according to any one of claims 1 to 6, wherein the sheet insulation is a resin film having elasticity and flexibility. The stator according to claim 3, wherein the predetermined value is two sheets of the sheet insulation having a thickness T. A rotating electrical machine comprising the stator according to any one of claims 1 to 8.

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