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Permanent magnet embedded rotor for rotating electric machine and rotating electric machine

A technology of rotating electrical machines and permanent magnets, applied in the shape/pattern/structure of magnetic circuit, magnetic circuit, electromechanical device, etc., can solve the problem of high centrifugal load

Active Publication Date: 2012-10-03
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the core area is relatively large, the centrifugal load on the bridge becomes too high

Method used

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  • Permanent magnet embedded rotor for rotating electric machine and rotating electric machine
  • Permanent magnet embedded rotor for rotating electric machine and rotating electric machine
  • Permanent magnet embedded rotor for rotating electric machine and rotating electric machine

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Experimental program
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no. 1 approach

[0059] The first embodiment has the following advantages.

[0060] (1) Each first outer cavity forming surface 201A extends from a starting point Pa1 on the rotor outer peripheral surface 162 to an intersection point Pa2 located on an imaginary extension plane 23A of the first magnetic pole facing surface 191A and the first magnetic pole facing surface 191A on the border between. The second outer cavity forming surface 201B extends from the starting point Pb1 on the rotor outer peripheral surface 162 to an intersection point Pb2 on the boundary between the second magnetic pole facing surface 191B and an imaginary extension plane 23B of the second magnetic pole facing surface 191B. . The first core region V1 is surrounded by the cavities 20A, 20B each having an outer cavity forming surface 201A, 201B, the magnetic pole accommodating portions 19A, 19B, and the rotor outer peripheral surface 162 . Compared with, for example, the case described in Japanese Patent Laid-Open No. 2...

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PUM

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Abstract

An accommodating recess has a magnet accommodating portion for accommodating a permanent magnet and a cavity, which is located at the q-axis side of the magnet accommodating portion. The cavity opens through a rotor outer circumferential surface. A starting point of an outer cavity forming surface is located on the rotor outer circumferential surface. The outer cavity forming surface intersects either a magnetic pole surface or an imaginary extended plane of a magnetic pole facing surface. The rotor outer circumferential surfac includes portions of an imaginary annular line. A starting point of the outer cavity forming surface is located between the d-axis and an intersection point between the imaginary annular line and the imaginary extended plane of the magnetic pole facing surface.

Description

technical field [0001] The invention relates to a permanent magnet embedded rotor for a rotating electrical machine and the rotating electrical machine. Background technique [0002] A rotor core for a permanent magnet embedded rotor includes a plurality of embedded permanent magnets. The permanent magnets form a plurality of poles. Each pair of adjacent poles is different from each other. Therefore, magnetic flux may short circuit between the ends of each pair of adjacent permanent magnets. As more short-circuit flux occurs, less torque is produced. [0003] In Japanese Patent Laid-Open No.2004-104962 Figure 11 with 12 The rotor core disclosed in has cavities that act as magnetic flux barriers. The magnetic flux barriers are each adjacent to an end of the permanent magnet and opened through a rotor outer peripheral surface serving as an outer peripheral surface of the rotor core. This reduces short circuit flux between adjacent permanent magnet ends. [0004] Adjace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K2213/03H02K1/2766H02K1/27
Inventor 镜味雅直楳山亮中根芳之
Owner TOYOTA IND CORP