KR20160043307A

KR20160043307A - Regulator for AC alternator for vehicles

Info

Publication number: KR20160043307A
Application number: KR1020140137487A
Authority: KR
Inventors: 류병구; 이승우; 전봉규
Original assignee: 이래오토모티브시스템 주식회사
Priority date: 2014-10-13
Filing date: 2014-10-13
Publication date: 2016-04-21

Abstract

The stator of the automotive alternator includes a stator core having a plurality of teeth forming a plurality of radially arranged slots, a stator coil disposed in the slots, a plurality of stator coils disposed respectively along inner walls of the plurality of slots, A plurality of insulators for insulating the stator core, and a plurality of wedges each disposed in the openings of the plurality of slots. Wherein the wedge has an insertion portion inserted into a space between the wing-like projections and a wedge-shaped protrusion protruding in a circumferential direction from the insertion portion, And a latching portion to which the latching portion is disposed.

Description

[0001] DESCRIPTION [0002] Regulators for AC alternators for vehicles [

The present invention relates to a stator of an automotive alternator.

The automotive alternator includes a rotor generating a magnetomotive force and a stator generating an induced electromotive force by a magnetomotive force generated by an outer electron.

The stator includes a stator core and a stator coil fixed thereto. The stator core includes a core back and a plurality of teeth, the core bag has a hollow cylindrical shape, and the plurality of teeth extend from the inner surface of the core bag toward the center. A stator coil is disposed in a slot formed between the plurality of teeth, and an insulator is inserted for insulation between the teeth and the stator coil. At this time, insulating paper is mainly used as an insulator.

On the other hand, the inner end of the tooth is provided with a wing protrusion protruding in the circumferential direction, and the stator coil is prevented from being separated from the slot by the wing protrusion.

At this time, the insulating paper is formed so that the portion corresponding to the opening side of the slot is open like the inner shape of the slot, and a wedge member is inserted into the opened portion. The wedge member is disposed in an open portion of the insulating paper so that insulation between the stator coil and the stator core surrounded by the insulating paper is maintained and prevents foreign matter from entering the slot.

Conventionally, a technique of forming a wedge using an insulating paper has been disclosed. However, when a wedge is formed by folding a paper-like material, if the insertion position is not correct, the wedge is pulled out through the opening of the slot, There was a problem that the prevention function could be lost.

In order to solve such a problem, Korean Patent Laid-Open No. 10-2008-0022726 discloses a technique of forming a wedge with an insulating plastic and fitting it into an opening of a slot, but a wedge made of a plastic material There is a problem in that it is difficult to fix the insulating paper surrounding the stator coil and it is difficult to maintain the insulating state between the stator coil and the stator core.

Korea Public Utility Model Office 2000-0002904 (Publication date: 2000.02.15) Korean Patent Laid-Open No. 10-2008-0022726 (published on March 12, 2008)

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to stably maintain the electrical insulation state between the stator coil and the stator core while minimizing the space in which the stator coil is installed, A stator of a vehicle alternator having a wedge that can be engaged and prevented from being released.

A stator of a vehicle alternator according to an embodiment of the present invention includes a stator core having a plurality of teeth forming a plurality of radially arranged slots, a stator coil disposed in the slots, A plurality of insulators arranged to isolate the stator coil and the stator core from each other, and a plurality of wedges disposed respectively in the openings of the plurality of slots. Wherein the wedge has an insertion portion inserted into a space between the wing-like projections and a wedge-shaped protrusion protruding in a circumferential direction from the insertion portion, And a latching portion to which the latching portion is disposed.

The wedge may be formed by injection molding with an insulating plastic material.

The wedge may further include an insulation reinforcing portion formed at both ends of the engaging portion and extending radially outward.

The insulated reinforcing portion may be disposed inside the end of the insulator and may overlap the predetermined length in the radial direction.

According to the present invention, since the wedge of the stator includes the inserting portion and the engaging portion, the insulated state between the stator coil and the stator core can be stably maintained and the overall strength of the stator can be improved.

1 is a view showing a stator of an automotive alternator according to an embodiment of the present invention.
2 is an enlarged view of the inside of the dotted line box of Fig.
Figure 3 is a perspective view of the wedge of the stator of Figure 2;
4 is a partially enlarged view of a stator of an automotive alternator according to another embodiment of the present invention.
5 is a perspective view of the wedge of the stator of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The stator of the automotive alternator according to the embodiment of the present invention includes a stator core 10 and a stator coil 20.

As shown in FIG. 1, the stator core 10 has a plurality of teeth 12 forming a plurality of slots 11 arranged in a radial direction. Specifically, the stator core 10 includes a core back 13 having a hollow cylindrical shape and a plurality of teeth 12 extending radially inwardly from the inner surface thereof. And a slot 11 is formed between the neighboring teeth 12, respectively. As shown in the figure, each slot 11 has an opening 14 open to the inside. At this time, as is known, the stator core 10 may be formed by stacking a plurality of plate-shaped members having magnetism.

2, a plurality of insulators 30 are disposed along the inner wall of the slot 11 of the stator core 10, respectively. The insulator radar 30 may be formed of an electrically insulating paper, and may be formed along the inner wall of the slot 11 and have a substantially U-shaped cross section. The insulator 30 is interposed between the stator coil 20 and the stator core 10 to perform a function of insulating them.

And a plurality of wedges 40 are disposed in the openings 14 of the plurality of slots 11 so as to block the openings 14 of the slots 11, respectively.

At the end of the tooth 12, an awning projection 15 protruding in a circumferential direction is formed. 2, a wing protrusion 15 protruding in the circumferential direction is formed on both sides of the end of the tooth 12 so that the width of the opening 14 is equal to the width of the space in which the stator coil 20 is disposed And the stator coils 20 can be prevented from being discharged from the slots 11 by these awning projections 15. [

2 and 3, the wedge 40 includes an insertion portion 41 to be inserted into a space between the wing-like projections 15, and a wedge projection 41 having a larger circumferential width than the insertion portion 41 15 which are arranged in the slots 11 so as to be caught in the slots 11. The insertion portion 41 is inserted between the awning protrusions 15 to support the wing protrusions 15 on both sides to improve the structural strength of the stator core 10. [ The engaging portion 42 is disposed in the slot 11 in a state where the engaging portion 42 is engaged with the wing projection 15 so that the wedge 40 supports the stator coil 20 disposed in the slot 11, Can be prevented. With this structure, it is possible to stably maintain the electrical insulation state between the stator coil 20 and the stator core 10, and at the same time to increase the overall strength of the stator core 10.

The wedge 40 may be formed by injection molding with an insulating plastic material. Since the wedge 40 is formed by injection molding, the shape-retaining property is better than that of the conventional paper wedge and assembly is facilitated.

Hereinafter, the stator according to another embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. The description of the same portions as the above-described embodiment will be omitted.

According to the present embodiment, the wedge 140 further includes an inserting portion 141, an engaging portion 142, and an insulating reinforcing portion 143 formed to extend radially outward at both ends of the engaging portion 142 . At this time, the insulation reinforcing portion 143 is disposed inside the end of the insulator 30 and overlaps with the predetermined length in the radial direction. The electrical insulation between the stator core 10 and the stator coil 20 can be more stably maintained by providing the insulation reinforcing portion 143. [

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes and modifications to the scope of the invention.

10: Stator core
11: Slot
12: Teeth
13: core bag
14: aperture
20: Stator coil
30: Insulator
40,140: Wedge
41, 141:
42, 142:
143: Insulation reinforcement

Claims

A stator core having a plurality of teeth forming a plurality of radially arranged slots,
A stator coil disposed in the slot,
A plurality of insulators each disposed along the inner wall of the plurality of slots to insulate the stator coil from the stator core,
And a plurality of wedges disposed respectively in the openings of the plurality of slots,
The tip of the tooth is formed with a wing projection projecting in a circumferential direction,
Wherein the wedge includes an insertion portion to be inserted into a space between the wing-like projections, and a latch portion disposed in the slot so as to be caught by the wing projection with a larger circumferential width than the insertion portion,

The method of claim 1,
Wherein the wedge is formed by injection molding with an insulating plastic material.

The method of claim 1,
Wherein the wedge further includes an insulation reinforcing portion formed at both ends of the engagement portion and extending radially outward.

4. The method of claim 3,
Wherein the insulated reinforcing portion is disposed inside the end of the insulator and overlaps with the predetermined length in the radial direction.