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stator and motor

A stator and core technology used in the field of electric motors

Active Publication Date: 2022-05-24
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the circumferential ends of the core blocks connected in series are fixed by welding or the like in order to form the laminated iron core in an annular shape, there may be differences between the ends due to the jig holding the outer diameter of the laminated iron core. Concerns about being fixed in a state where the load is displaced radially

Method used

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  • stator and motor
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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0022] [Stator 30]

[0023] Figure 1 is a top view of the stator 30 involved in embodiment 1 of the present invention. Stator 30 has a laminated core 1 and a wound 2 configured via an insulating component in the laminated core 1.

[0024] [Laminated core 1]

[0025] Figure 2 is a top view of the laminated core 30 involved in embodiment 1 of the present invention. The laminated iron core 1 has a plurality of core blocks 20, the plurality of core blocks 20 having a first outer perimeter wall constituting the laminated iron core 1a of the dorsal yoke 6 and from the dorsal yoke 6 protruding teeth 7, and are interconnected to form a string. at Figure 2 In total, a total of 9 core blocks 20 are configured to be toroidal, but as long as the laminated iron core 1 can be formed into a ring, the total number of core blocks 20 may be less than 8, or more than 10. In the laminated core 1, the dorsal yoke 6 is configured to be cylindrical. as Figure 1 As shown, the laminated iron core 1 is w...

Embodiment approach 2

[0047] Figure 9 Is a top view of the layered core 1A of the stator 30A involved in the embodiment of the present invention 2. Figure 10 is constituted Figure 9 Enlarged view of the connection section of the laminated core 1A of the stator 30A. Where, the pair has and Figure 1 to Figure 8 The stator 30 of the same structure of the part is marked with the same drawing marks and its description is omitted.

[0048] as Figure 10 As shown, the junction portion 10A has a convex portion 8a formed at the end of the core 8 and a concave portion 9a chimeric formed at the end of the core 9. Observed in the lamination direction of the laminated core 1A, the junction portion 10A has: the first side 16, is the joint portion of the concave 9a and the convex part 8a and is located on the outer periphery of the laminated iron core 1A; and the second side 17, is the joint portion of the concave 9a and the convex part 8a and is located on the inner periphery of the laminated core 1A. The junction p...

Embodiment approach 3

[0052] Figure 11 is a cross-sectional view of the fixed state of the stator 30B and the housing 40 involved in embodiment 3 of the present invention. Where, the pair has and Figures 1 to 10 The stator 30 and the stator 30A of the same structure are marked with the same reference numerals and omit their description. Figure 11 The stator 30B shown is a stator 30 of embodiment 1 or a stator 30A of embodiment 2.

[0053] Housing 40 is composed of a magnetic material, the inner diameter of which is smaller than the outer diameter of the laminated iron core 1 or the laminated iron core 1A. Housing 40 is, for example, a housing of a motor. The laminated core 1 or laminated core 1A and the housing 40 are fixed by hot pressing. The inner perimeter wall 40a of the housing 40 is in contact with the first outer perimeter wall 1a of the laminated core 1 or the laminated core 1A. There is a gap formed between the inner perimeter wall 40a of the housing 40 and the second peripheral wall 11 and ...

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PUM

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Abstract

The laminated iron core of the stator has: a connecting portion for connecting both ends of a plurality of core blocks arranged in an annular shape and connected to each other to form a series; and a second outer peripheral wall for connecting The first outer peripheral wall constituted by the back yoke portion is formed on the inner side in the radial direction, and the connecting portion has a first side portion as viewed in the stacking direction, which is a joint portion between the concave portion and the convex portion and is located on the outer peripheral side of the laminated core. and the second side, which is located on the inner peripheral side of the laminated iron core, thus has a V-shaped joint portion whose front end protrudes in the circumferential direction. For the laminated iron core, when viewed in the lamination direction, it will be in the connecting portion The angle θ1 of the line L1 connecting the inner diameter side connection point of the wall surface where the teeth protrude from the back yoke portion and one end of the second outer peripheral wall and the second side of the connection portion is 90°±5°, An angle θ2 between a line L2 connecting the radially inner connecting point and the other end of the second outer peripheral wall and the first side of the connecting portion forms an angle of 90°±5°.

Description

Technical field [0001] The present invention relates to a stator consisting of a laminated iron core of a connected type and an electric motor having the stator. Background [0002] In the past, electric motors mostly used a laminated iron core that was laminated by a thin plate of electromagnetic steel cut by a stamping press and integrated by riveting or welding as a stator. In such a stator, there is a situation in which the requirements for improving the operability of winding winding cannot be fully met. In view of this, a laminated iron core structure consisting of a stator is proposed to split the laminated iron core constituting a stator, and a plurality of core blocks having a tooth part protruding radially from the dorsal yoke to the inner periphery side are formed into a circular segmentation type. However, in the case of the dorsal yoke being formed into a straight line for winding, due to the insertion of a winding nozzle between the teeth to wind the wire, the defor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/18
CPCH02K1/18
Inventor 藤末义和坂边克弥
Owner MITSUBISHI ELECTRIC CORP