Permanent magnet motor and refrigeration compressor

Abstract

The invention relates to a permanent magnet motor and a refrigeration compressor. The permanent magnet motor comprises a stator and a rotor located in the stator, and is characterized in that the stator comprises a stator yoke part, armature teeth and auxiliary teeth are alternately arranged on the inner side face of the stator yoke part along the circumference, the width of the armature teeth islarger than that of the auxiliary teeth, and tooth grooves are formed between the armature teeth and the auxiliary teeth; the armature teeth are wound with a three-phase winding, the rotor comprises arotor core, the outer peripheral surface of the rotor core is provided with a plurality of magnetic shoes, and the permanent magnet motor is small in torque fluctuation amplitude and stable in rotating speed.

Description

technical field [0001] The invention relates to the technical field of motor equipment, in particular to a permanent magnet motor and a refrigeration compressor. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] At present, with the implementation of the new national standard, refrigerator manufacturers often use low speed when conducting power consumption tests. Noise also puts forward higher requirements. [0004] Existing refrigeration compressors mostly use 6-pole, 9-slot and 4-pole, 6-slot motors, the stator teeth of which are evenly distributed, and the winding is a concentrated double-layer winding. The inventor found that the torque ripple of this type of motor is large at low speed , so that the speed of the compressor is unstable during operation, and the speed fluctuates greatly, resulting in a large vibration of the compressor. Conten...

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Problems solved by technology

[0004] Existing refrigeration compressors mostly use 6-pole, 9-slot and 4-pole, 6-slot motors, the stator teeth of which are evenly distributed, and the winding is a concentrated double-layer winding. The inventor found that the torque ripple of this type of motor is large at low speed , so that the speed of the compressor is unstable during operation, and the speed fluctuates greatly, resulting in a large vibration of the compressor

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