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stator

A stator and stator unit technology, applied in the field of stator, can solve the problem of reducing the heat dissipation of the coil, and achieve the effect of preventing contact and improving the heat dissipation

Active Publication Date: 2016-05-25
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, there is a problem that the intermediate portion of the coil protrudes radially inward and may come into contact with the rotor disposed inside the stator.
[0006] In addition, there is also a problem that the middle part of the coil is separated from the back of the core, which reduces the heat dissipation of the coil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0032] figure 1 It is an overall perspective view showing the stator according to Embodiment 1 of the present invention.

[0033] The stator is integrated by combining twelve divided stator units 3 in the circumferential direction and fitting the outer ring 15 . A rotor (not shown) is provided on the central axis of the stator.

[0034] The stator is a stator mounted on a driving electric motor of a hybrid vehicle or the like.

[0035] figure 2 yes figure 1 The overall perspective view of the divided stator unit 3, image 3 yes figure 2 An exploded perspective view of the split stator unit 3, Figure 4 yes figure 2 Side view of the split stator unit 3.

[0036] Each divided stator unit 3 includes: a core block portion 4 composed of a core back 11 and a tooth portion 12 whose front end extends radially inward from the middle portion of the core back 11; Resin insulators 6 on both end faces in the axial direction; and coil 5 attached to the tooth portion 12 .

[003...

Embodiment approach 2

[0057] Figure 5 It is a side view of the coil 5 in Embodiment 2 of this invention.

[0058] In the present embodiment, the coil 5 is plastically deformed so that the radius of curvature R becomes a large value.

[0059] The other structures are the same as those of the divided stator unit 3 of the first embodiment.

[0060] In the present embodiment, the coil 5 is plastically deformed so that the radius of curvature R becomes a larger value. Compared with the first embodiment, there is an effect that the elasticity of the coil 5 is utilized by making the middle part protrude toward the core back 11 side by plastic deformation. The area of ​​the inner peripheral surface of the core back 11 that is pressed hard increases, and accordingly the heat dissipation of the coil 5 can be improved.

[0061]In addition, in each of the above-mentioned embodiments, the protrusions 9 are formed on the insulator 6 and the holes 14 are formed on both end surfaces of the teeth 12 to form the ...

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Abstract

A stator, through pressing a middle part of a coil to an inner circumferential surface of an iron core back, can prevent the contact between the coil and a rotor, and additionally can improve the heat dissipation of the coil. In the stator of the present invention, each segmented stator unit (3) includes an iron core block part (4), two insulators (6), and a coil (5). The iron core block part (4) is composed of an iron core back (11) and a tooth part (12), wherein a front end part of the tooth part (12) extends from the middle part of the iron core back (11) to a radial inner side. The two insulators (6) are fixed to two end faces in the axis direction of the tooth part (12) through fixing parts respectively. Coil end parts (13) formed on two sides of the coil (5) in the axis direction of the coil (5) are disposed in a pair of flange parts of each insulator (6). The coil (5), through plastic deformation, enables the middle part to project toward a side of the iron core back (11) and presses the inner circumferential surface of the iron core back (11).

Description

technical field [0001] The present invention relates to a stator in which divided stator units in which coils are inserted into teeth are arranged in a circumferential direction. Background technique [0002] At present, there is known a divided stator unit, by inserting the fixed claw from the top side of the tooth part, that is, between the coil end surface and the coil end part of the tooth part, and locking it on the coil end surface of the tooth part, so that the Press the coil upper surface pressing frame of the fixture toward the coil side to fix the coil to the teeth (for example, refer to Patent Document 1). [0003] Patent Document 1: Japanese Patent Laid-Open No. 2010-51087 [0004] However, in the divided stator unit of the above-mentioned structure, the rail-shaped upper surface pressing frame that is in surface contact with the coil does not press the coil uniformly, and there is a gap between the coil ends compared with the coil end into which the fixing claw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/14H02K3/34H02K3/04H02K15/08
Inventor 西村慎二
Owner MITSUBISHI ELECTRIC CORP