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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, used in machines/engines, synchronous motors with stationary armatures and rotating magnets, mechanical equipment, etc., to solve problems such as difficulty in suppressing torque pulsation

Active Publication Date: 2009-10-28
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

Examples

Experimental program
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Effect test

Embodiment Construction

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

[0058] according to Figure 1A , the stator 11 is constituted by an annular core 12 and coils 13 provided in slits 122 between a plurality of teeth 121 arranged on the inner periphery of the core 12 . In this embodiment, the number of teeth 121 and slits 122 is 18. The slits 122 are arranged at equal intervals (equal angular intervals) in the circumferential direction of the annular stator 11 . Such as figure 2 As shown, the core 12 is formed 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] Generally, 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...increasing in turn 0.5), when the number of slits of the stator is K, the following relational expre...

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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 as magnetic poles are embedded in a rotor rotating inside a stator with coils placed therein. 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] In the interior of the rotor of such a rotating electric machine, a plurality of permanent magnets are buried adjacent to each other in the circumferential direction of the rotor. A pair of adjacent permanent magnet poles are arranged differently from each other and are set in the circumferential direction of the rotor. Torque ripple occurs due to rapid magnetic flux density fluctuations occurring in a portion (magnetic pole switching portion) between a pair of adjacent permanent magnets, thereby generating vibration and noise in the rotating elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/12H02K1/17H02K3/28H02K21/16H02K29/00F04B39/00
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