JP6438866B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine.

  The rotating electrical machine includes a stator, and the stator core is formed by laminating a predetermined number of electromagnetic steel sheets with their positions defined in the radial direction and the circumferential direction. Here, the stator core is formed by rolling every few sheets so as to cancel the thickness deviation of the electromagnetic steel sheet, and the method of ensuring the flatness of the end face of the stator core and improving the accuracy of the laminated thickness There is.

  For example, in Patent Document 1, in a stator of a rotating electrical machine attached to a support portion by a bolt, the stator is formed by laminating a plurality of steel plates having metal ears arranged at equal intervals in the circumferential direction, and adding in the laminating direction. A stator of a rotating electrical machine, wherein a plurality of laminated blocks that are fastened and fixed in a stacked manner are rolled up by aligning the positions of the metal ears and the surfaces of the side surfaces are welded and integrated in the stacking direction. ,a.

JP 2007-159300 A

  In rolling, if the alignment mark is not provided on the electrical steel sheet, it cannot be determined that the laminated layer is rotated by the specified angle after the rolling, and if the alignment mark is provided on the outer periphery of the electrical steel sheet, the magnetic circuit There is a concern about the influence on the motor, which may lead to a decrease in the performance of the rotating electrical machine.

  Accordingly, an object of the present invention is to provide a rotating electrical machine that can determine whether a stator core is rolled up as specified while suppressing a decrease in performance of the rotating electrical machine.

  In order to solve the above problems, for example, the configuration described in the claims is adopted.

  The present application includes a plurality of means for solving the above-described problems. To give an example, a housing, a stator provided inside the housing and having a stator core around which a coil is wound, and the fixing A rotor held rotatably through a gap on the inner peripheral side of the child, and the stator iron core is formed by laminating a predetermined number of electromagnetic steel plates, and the electromagnetic steel plates are arranged at equal intervals. A rotating electric machine having a plurality of metal ears, wherein one of the plurality of metal ears is provided with an alignment mark.

  According to the present invention, it is possible to determine whether or not the stator core is configured to be rolled up as specified while suppressing a decrease in the performance of the rotating electrical machine, thereby improving the productivity of the stator core.

  Problems, configurations, and effects other than those described above will become apparent from the description of the following examples.

Sectional drawing of the rotary electric machine in Example 1. FIG. Sectional drawing of the radial direction of the stator of a rotary electric machine in Example 1. FIG. Sectional drawing of the radial direction of the stator core of a rotary electric machine in Example 1. FIG. Sectional drawing of the radial direction of the stator core of a rotary electric machine in Example 2. FIG. Sectional drawing of the radial direction of the stator core of a rotary electric machine in Example 3. FIG.

  Embodiments will be described below with reference to the drawings.

  FIG. 1 shows a cross-sectional view of the rotating electrical machine. As shown in FIG. 1, a rotor having a stator core 3 around which a coil 2 is wound, and a rotor having a rotor core 4, a shaft 5, and a cover plate 6 are disposed inside a housing 1 of the rotating electrical machine. is there. The housing 1 is fixed to the shaft 5 via the bearing 7, and the rotor is rotatably held by providing a gap between the rotor and the stator.

  FIG. 2 shows a cross-sectional shape of the stator core 3. The stator core 3 is provided with a plurality of lugs 9 arranged at equal intervals for attachment to a slot 8 for inserting the coil 2 or a vehicle. Here, the ear metal 9 has a through hole 10, and the stator core 3 is attached to a support portion such as a vehicle by a bolt.

  The stator core 3 is formed by laminating a predetermined number of electromagnetic steel sheets and then fixing them in the laminating direction by caulking 11 provided on the electromagnetic steel sheets or welding (welded portion 12) on the outer peripheral surface of the electromagnetic steel sheets. Is done. Here, because there is a plate thickness deviation for each electromagnetic steel sheet, when all the electromagnetic steel sheets are laminated in the same direction, the stator core 3 is inclined, and after fixing in the lamination direction, the flatness of the end face is ensured. There is a concern that it will not be possible or that the lamination thickness accuracy will deteriorate, and ultimately there will be a concern that the performance of the rotating electrical machine will deteriorate. In view of this, a method of performing transposition every several sheets so as to cancel the thickness deviation of the electromagnetic steel sheet has been considered. If the electromagnetic steel sheet has an ear metal 9 for attachment to a vehicle or the like, the position of the ear metal 9 Are transposed together.

  When forming the stator core 3 by rolling the electrical steel sheet, if the alignment mark is not provided on the electrical steel sheet, it is impossible to judge that the electrical steel sheet has been laminated by rotating the specified angle after being laminated, Further, when the alignment mark is provided on the outer periphery of the electromagnetic steel sheet, there is a concern that the magnetic circuit may be affected, leading to a decrease in performance. For this reason, it is necessary to provide an alignment mark so that it is possible to determine whether or not the stator iron core is rolled up as specified while suppressing a decrease in performance of the rotating electrical machine.

  As shown in FIG. 3, in the present invention, the performance of the rotating electrical machine is provided by providing a matching mark 13 on one of a plurality of metal ears 9 arranged at equal intervals for mounting an electromagnetic steel plate to a vehicle or the like. It has been found that it is possible to determine whether the stator core 3 is made of an electromagnetic steel sheet rolled up as specified while suppressing the decrease. In the first embodiment, the alignment mark 13 is provided at the apex 20 of the ear metal bar of the electromagnetic steel plate, and the alignment mark 13 shows a shape that is symmetrical with respect to the apex 20. In this case, there is only one match mark, and a wider seating surface can be secured when the vehicle is mounted than when the match marks are provided at a plurality of locations. However, even if the front surface 21 and the back surface 22 of the electromagnetic steel sheet are reversed, the alignment mark has the same shape. Therefore, when the magnetic steel sheet needs to be reversed at the time of lamination, it cannot be determined whether or not the magnetic steel sheet is reversed after lamination.

  In the first embodiment, a stator core formed by stacking electromagnetic steel sheets provided with a mating mark at the apex 20 of one metal bar of the electromagnetic steel sheet and provided with a mating mark having a symmetrical shape with respect to the apex 20 is taken as an example. As mentioned.

  As shown in FIG. 4, in the second embodiment, a case where the alignment mark 14 is provided at the apex 20 of the ear bar of the electromagnetic steel plate and the alignment mark 14 has an asymmetric shape with respect to the apex 20 will be described.

  In the case of Example 2, like Example 1, it can be discriminate | determined whether the stator core 3 is comprised with the electromagnetic steel plate rolled up as prescribed | regulated. Further, when the front surface 21 and the back surface 22 of the electromagnetic steel sheet are reversed, the shape of the alignment mark is also reversed. Therefore, when the magnetic steel sheet needs to be reversed at the time of lamination, it can be determined whether or not the magnetic steel sheet is reversed after lamination. .

  In Example 1 and Example 2, the stator iron core formed by laminating | stacking the electromagnetic steel plate which provided the alignment mark in the vertex 20 of one ear metal of an electromagnetic steel plate was mentioned as an example.

  As shown in FIG. 5, in Example 3, a case will be described in which one alignment mark 15 is provided at a location other than the apex 20 of the metal bar.

  In the case of Example 3, as in Example 1 and Example 2, it can be determined whether the stator core 3 is made of an electromagnetic steel sheet rolled up as specified. Further, when the surface 21 and the back surface 22 of the electromagnetic steel sheet are reversed, the shape of the mark is also reversed. Therefore, when the magnetic steel sheet needs to be reversed at the time of lamination, it is possible to determine whether the magnetic steel sheet is reversed after lamination. The alignment mark may have any shape.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 Housing 2 Coil 3 Stator iron core 4 Rotor iron core 5 Shaft 6 Cover plate 7 Bearing 8 Slot 9 Ear metal 10 Through hole 11 Clamping 12 Welded part 13 Match mark in Example 1 14 Match mark in Example 2 15 Example Alignment mark in 3 20 Apex of ear metal 21 Surface of electrical steel sheet 22 Back surface of electrical steel sheet

Claims (4)

A housing;
A stator provided inside the housing and having a stator core around which a coil is wound;
A rotor held rotatably on the inner peripheral side of the stator via a gap,
The stator core is formed by laminating a predetermined number of electromagnetic steel sheets,
In the electrical steel sheet , a plurality of metal ears projecting radially outwards are arranged at equal intervals, and the metal wire is a rotating electrical machine provided with through holes for attachment ,
A rotating electrical machine in which one alignment mark is provided on one of the plurality of metal bars. The rotating electrical machine according to claim 1,
The alignment mark is provided at the apex of the ear plate of the electrical steel sheet,
A rotating electrical machine in which the alignment mark is symmetrical with respect to the apex of the metal ear. The rotating electrical machine according to claim 1,
The alignment mark is provided at the apex of the ear plate of the electrical steel sheet,
A rotating electrical machine in which the alignment mark has an asymmetric shape with respect to the apex of the ear metal. The rotating electrical machine according to claim 1,
A rotating electrical machine in which one of the alignment marks is provided other than the apex of the ear metal of the electromagnetic steel plate.

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