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Rotating electric machine with embedded permanent magnets, motor for vehicle air conditioner and close-type electric compressor

A technology of rotating electrical machines and permanent magnets, which is applied in the direction of machines/engines, synchronous motors with stationary armatures and rotating magnets, mechanical equipment, etc., and can solve problems such as difficult to suppress torque ripple

Active Publication Date: 2006-11-01
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to suppress torque ripple

Method used

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  • Rotating electric machine with embedded permanent magnets, motor for vehicle air conditioner and close-type electric compressor
  • Rotating electric machine with embedded permanent magnets, motor for vehicle air conditioner and close-type electric compressor
  • Rotating electric machine with embedded permanent magnets, motor for vehicle air conditioner and close-type electric compressor

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Experimental program
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Effect test

Embodiment Construction

[0057] The following will be based on Figure 1- Figure 29 A first embodiment of the present invention will be described.

[0058] According to FIG. 1A , the stator 11 is composed of an annular core 12 and coils 13 provided in slits 122 between a plurality of teeth 121 arranged on the inner circumference of the core 12 . In this embodiment, the number of the teeth 121 and the slits 122 is 18. The slits 122 are arranged at equal intervals (equiangular intervals) in the circumferential direction of the annular stator 11 . like figure 2 As shown, the core 12 is constructed by stacking a plurality of core plates 14 made of a magnetic body (steel plate). The coil 13 provided in the slit 122 is wound as a wave winding.

[0059] In general, the number of poles is p (integer), the number of phases is m (integer), and the number of slits per pole and phase is q (q=0.5, 1, 1.5, 2, 2.5... This increases by 0.5), the stator When the number of slits of is K, the following relational e...

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PUM

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Abstract

A plurality of circumferential portions are provided in a plurality of portions of the outer periphery of the rotor respectively corresponding to magnetic pole center portions of the plurality of permanent magnets. Each circumferential portion is a portion of an imaginary circumferential surface concentric with the rotation center axis of the rotor. The plurality of circumferential portions are separated from each other in the circumferential direction. Each of the plurality of convex portions joins a respective adjacent pair of the aforementioned circumferential portions. Each convex portion protrudes toward the radially outer side while being located radially inward of the aforementioned imaginary peripheral surface. Each convex portion has a plurality of corners projecting radially outward. Therefore, it is possible to provide a rotating electrical machine having a structure that does not use reluctance torque to increase the average value of output torque while suppressing a decrease in the average value of output torque.

Description

technical field [0001] The present invention relates to a permanent-magnet-embedded rotating electrical machine in which a plurality of permanent magnets serving as magnetic poles are embedded in a rotor that rotates inside a stator on which coils are placed. The present invention further relates to a motor for a vehicle air conditioner and a hermetic electric compressor equipped with the rotary electric machine. Background technique [0002] Inside the rotor of such a rotating electrical machine, a plurality of permanent magnets are embedded adjacent to each other in the circumferential direction of the rotor. A pair of adjacent permanent magnet poles are set in the circumferential direction of the rotor so that they are arranged differently from each other. Since a rapid magnetic flux density change occurs in a portion (magnetic pole switching portion) between a pair of adjacent permanent magnets, torque pulsation is generated, and vibration and noise are generated in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/12F04B39/00H02K1/17H02K3/28H02K21/16H02K29/00
Inventor 安谷屋拓佐伯爱上辻清深作博史米良实小林雅俊
Owner TOYOTA IND CORP