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Motor

A technology of electric motors and iron cores, applied in the field of electric motors, can solve problems such as uneven magnetic fields, deterioration of stator S characteristics, uneven gaps, etc.

Inactive Publication Date: 2007-05-23
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the stator S is pressed into the case H in such a state where scratches have occurred, the teeth T adjacent to the stator S in the circumferential direction and the circumferential slots of the teeth T are not uniform, and due to the applied current On the other hand, the magnetic field generated in the stator S is not uniform in the circumferential direction, and the characteristics of the stator S deteriorate.

Method used

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Embodiment Construction

[0027] Hereinafter, an embodiment of a motor according to the present invention will be described with reference to FIGS. 1 to 16 . In addition, in one embodiment of the description of the present invention, for the sake of convenience, the up-down direction in each figure is referred to as "up-down direction", but the direction in the actual mounting state is not limited.

[0028] 1. The first embodiment

[0029] A motor 1 according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an axial sectional view showing a motor 1 according to a first embodiment, and FIG. 2 is an A-A sectional view of FIG. 1 . However, in FIG. 2 , peripheral components such as a rotating shaft and a winding are omitted.

[0030] The motor 1 has a cylindrical case having a small opening 2a formed axially above the other end side in the axial direction and a large opening 2b formed axially below the one end side in the axial direction and havin...

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Abstract

A motor in an example of the invention forms a stator core stack by laminating a plurality of straight cores having a core back, a tooth, and a linking part for linking the core backs. In the stator core stack, the linking portion is folded and deformed the linking portion so as to join an end surfaces of the straight core, and a core back outer peripheral portion is formed at the back side of the core back, and the diameter of the core back outer peripheral portion is formed same as or shorter than the diameter of the inner peripheral surface of the housing, and is disposed in the housing. An engaging portion extending in the axial direction and projecting in the radial inward direction is formed in the inner peripheral surface of the housing, and the end surfaces of the straight core are engaged or fitted with the engaging portion.

Description

[0001] This application is filed in accordance with Article 42 of the Implementing Regulations of the Chinese Patent Law, and is a divisional application of the Chinese patent application No. 200410035131.X filed on April 23, 2004 with the name "electric motor". technical field [0002] The present invention relates to electric motors, in particular to inner rotor type electric motors. Background technique [0003] Conventionally, there is known an inner rotor type motor in which magnets are disposed on the inner peripheral side of a stator. In such an inner rotor type motor, as shown in the plan view of FIG. 14 , a straight core C is formed in which a plurality of core pieces C1 are connected by thin-walled connection portions. The straight core C is a stamped flat plate made of a magnetic material such as a silicon steel plate, and a stator core body U is formed by laminating a plurality of them as shown in the perspective view of FIG. 15 . Each core piece C1 has a core b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/12H02K1/14H02K15/02H02K1/18
Inventor 藤居义雄山田阳介大田垣晃
Owner NIDEC CORP