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Permanent magnet rotating machine

A rotating machine, permanent magnet technology, applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve problems such as increasing magnetic flux, and achieve the effect of improving efficiency

Active Publication Date: 2011-08-17
AICHI ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned conventional permanent magnet motor cannot sufficiently increase the magnetic flux

Method used

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Experimental program
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Embodiment Construction

[0059] Conventionally, in permanent magnet motors, rare earth magnets (rare earth magnets) having a high magnetic flux density have been used. In particular, neodymium magnets containing Nd (neodymium), Fe (iron), Co (cobalt), B (boron) and the like are used. However, since rare earth magnets such as neodymium magnets are expensive, it is necessary to develop a permanent magnet motor using an inexpensive permanent magnet. Permanent magnet motors such as ferrite magnets.

[0060] In a permanent magnet motor in which permanent magnets are inserted into magnet insertion holes provided in the main magnetic pole portion of the rotor, the magnetic flux depends on the length of the outer wall (wall on the outer peripheral surface) of the magnet insertion hole. Therefore, when using a magnet with a low magnetic flux density such as a ferrite magnet, compared with the case of using a rare-earth magnet with a high magnetic flux density, in order to obtain a permanent magnet motor with ...

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Abstract

The invention provides a permanent magnet rotating machine. The external circumferential surface of a rotor comprises a first curved line portion and a second curved line portion which have different radius curvature. A f irst magnetic housing hole of a first magnet and a second magnetic housing hole of a second magnet are provided on a main magnetic pole portion. External wall and inner wall of the first magnetic housing hole are formed in arcs centered at a central point. External wall and inner wall of the second magnetic housing hole are formed in arcs centered at a central point different from the central point. The magnetic aligning directions of the first magnet (the second magnetic) are gathered at a center aligning point at the central part and gathered at an end aligning center point far away from the center aligning point at the end part.

Description

[0001] This application is a divisional application of the patent application with the application number 200810185354.2, the application date is December 22, 2008, and the invention name is "permanent magnet rotating machinery". technical field [0002] The present invention relates to a permanent magnet rotary machine in which a permanent magnet is inserted into a magnet insertion hole provided in a rotor, and particularly relates to a technique for improving the efficiency of the permanent magnet rotary machine. Background technique [0003] As an electric motor that drives a compressor of an air conditioner (air conditioner) or a refrigerator (refrigerator), or drives a vehicle (motor vehicle) or an on-board device (apparatus installed in a motor vehicle), etc. As an electric motor etc., a permanent magnet motor in which a permanent magnet is inserted into a magnet insertion hole provided on a rotor (referred to as an "Interior Permanent Magnet Motor") can be used. Such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
Inventor 大熊繁道木慎二富田睦雄佐藤光彦金子清一
Owner AICHI ELECTRIC
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