阅读说明：本技术 旋转电机的定子 (Stator of rotating electric machine ) 是由 矶野祐辅 于 2017-05-23 设计创作，主要内容包括：旋转电机的定子具有：定子铁芯,其是层叠钢板而形成的,并具有多个槽；槽绝缘件,其分别配置于多个槽；以及绕组,其隔着槽绝缘件分别配置于多个槽,槽绝缘件是将纤维具有方向的一对绝缘纸重合而形成的,一对绝缘纸中的与定子铁芯接触的一侧的绝缘纸以使纤维的方向与层叠钢板的方向平行的方式配置,一对绝缘纸中的与绕组接触的一侧的绝缘纸以使纤维的方向与绕组的长度方向垂直的方式配置。(A stator of a rotating electric machine includes: a stator core formed by laminating steel plates and having a plurality of slots; a groove insulator disposed in each of the plurality of grooves; and a winding disposed in each of the plurality of slots with a slot insulator interposed therebetween, the slot insulator being formed by superimposing a pair of insulating papers having a fiber direction, the insulating paper on one side of the pair of insulating papers in contact with the stator core being disposed such that the fiber direction is parallel to the direction of the laminated steel plates, and the insulating paper on one side of the pair of insulating papers in contact with the winding being disposed such that the fiber direction is perpendicular to the longitudinal direction of the winding.)

1. A stator of a rotating electric machine, comprising:

a stator core formed by laminating steel plates and having a plurality of slots;

a groove insulator disposed in each of the plurality of grooves; and

a winding disposed in each of the plurality of slots with the slot insulator interposed therebetween,

the slot insulator is formed by overlapping a pair of slot insulating papers with fibers having directions,

the slot insulating paper on the side of the pair of slot insulating papers that is in contact with the stator core is disposed such that the direction of the fibers is parallel to the direction in which the steel plates are stacked,

the slot insulating paper on the side of the pair of slot insulating papers that is in contact with the winding is disposed such that the direction of the fibers is perpendicular to the longitudinal direction of the winding.

2. The stator of the rotating electric machine according to claim 1,

the winding includes: a first layer coil disposed on the bottom surface side of the slot; and a second layer coil laminated on the first layer coil,

a separator is disposed between the first layer coil and the second layer coil,

the separator is formed by overlapping a pair of interlayer insulating papers having fibers with directions,

the pair of interlayer insulating papers are arranged such that the direction of the fibers is perpendicular to the longitudinal direction of the winding.

3. The stator of the rotating electric machine according to claim 2,

at least one of the pair of interlayer insulating sheets has a cut portion that engages with an end of the slot insulator.

Technical Field

The present invention relates to a rotating electrical machine, and more particularly, to an insulation structure of a winding disposed in a stator of a distributed winding motor.

Background

Conventionally, in a stator used for a three-phase rotating electrical machine such as a motor, a generator, or a motor generator, a distributed winding method is used in which three-phase windings of U-phase, V-phase, and W-phase are arranged so as to straddle a plurality of slots formed in a stator core. In the manufacturing process of such a stator core, first, slot insulators (insulating paper) are disposed in the slots, and the coils of the first layer are inserted. Then, after disposing a spacer for interlayer insulation and inserting the coil of the second layer, each coil and each insulating paper are fixed by a wedge.

In the distributed winding motor, since the windings of the respective phases are wound so as to straddle a plurality of slots of the stator, it is difficult to arrange the windings with an automatic machine. Therefore, in the manufacture of the distributed winding motor, the step of disposing the winding and the insulating paper in each slot is performed by manual work. Therefore, when the winding is inserted into the slot in which the slot insulator is disposed, the slot insulator may be broken by friction between the slot insulator and the winding, or the position of the slot insulator may be displaced in the axial direction. Accordingly, a technique is disclosed in which: in consideration of the offset amount of the slot insulator due to the coil insertion work, the length of the slot insulator in the axial direction of the stator core is increased to increase the amount of protrusion from the end of the stator core (see, for example, patent document 1).

Disclosure of Invention

Problems to be solved by the invention

However, in the technique described in patent document 1, damage of the slot insulator due to friction between the slot insulator and the coil is not considered. Further, since the slot insulator protrudes from the end of the stator core by a large amount, the material cost of the slot insulator increases.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a stator for a rotating electric machine, which can prevent the position of a slot insulator from being displaced when a winding is inserted into a slot while suppressing the damage of the slot insulator due to the friction between the slot insulator and a coil.

Means for solving the problems

The stator of a rotating electric machine of the present invention includes: a stator core formed by laminating steel plates and having a plurality of slots; a groove insulator disposed in each of the plurality of grooves; and a winding disposed in each of the plurality of slots with a slot insulator interposed therebetween, wherein the slot insulator is formed by overlapping a pair of insulating papers having a fiber direction, the insulating paper on the side of the pair of insulating papers in contact with the stator core is disposed such that the fiber direction is parallel to the direction of the laminated steel plates, and the insulating paper on the side of the pair of insulating papers in contact with the winding is disposed such that the fiber direction is perpendicular to the longitudinal direction of the winding.

Effects of the invention

According to the stator of the rotating electric machine of the present invention, the direction of the fiber of the slot insulator is determined according to the position where the slot insulator is disposed, so that damage of the slot insulator can be suppressed, and the insulation between the winding and the stator core can be improved.

Drawings

Fig. 1 is a schematic view showing a rotary electric machine provided with a stator according to embodiment 1 of the present invention.

Fig. 2 is a view showing a stator core constituting the stator of fig. 1.

Fig. 3 is a partial perspective view illustrating a process of forming the stator core of fig. 2.

Fig. 4 is a partial perspective view illustrating a process of arranging a winding in the stator core of fig. 2.

Fig. 5 is a partial perspective view illustrating a process of arranging a winding in the stator core of fig. 2.

Fig. 6 is a schematic view of the stator core of fig. 5 viewed from the inner peripheral side of the stator core.

Fig. 7 is a schematic view of the stator core of fig. 6 as viewed from the axial direction.

Detailed Description

Preferred embodiments of a stator of a rotating electric machine according to the present invention will be described below with reference to the accompanying drawings.