Permanent magnet synchronous motor used for air conditioner compressor

Abstract

The invention aims to disclose a permanent magnet synchronous motor used for an air conditioner compressor. The permanent magnet synchronous motor comprises a rotor and a stator, wherein the rotor is in an embedded magnetic steel structure; a rotor sheet is provided with through grooves of which the number is the same as that of poles of the motor; the through grooves are connected through narrow strips; and symmetrical chamfered edges are arranged in an inner arc of teeth of the stator sheet. Compared with the prior art, with the adoption of groove-shaped design of the stator and the rotor in a concentrated winding, the sine property of the concentrated winding motor can be improved, and leakage reactance can be reduced, so as to obtain higher power factors and efficiency; and in addition, the tooth socket torque can be reduced, the low-speed loading capacity is improved when the position of the air conditioner is not controlled, and the purposes of the invention can be realized.

Description

technical field [0001] The invention relates to a synchronous motor, in particular to a permanent magnet synchronous motor for an air conditioner compressor. Background technique [0002] The electric air conditioner compressor motor is used as the drive motor of the air conditioner, and its working efficiency and low-speed operation ability are related to the benefits of social energy saving and emission reduction. [0003] The permanent magnet synchronous motor in the form of concentrated winding has the advantages of simple manufacturing process and small axial space size. It will produce a large extreme leakage reactance, so it is difficult to obtain good low-speed operation ability (especially low-speed position sensorless start-up ability), the speed of the existing concentrated winding air-conditioning compressor can only be above 15% of the maximum speed and low-speed load running, and it is difficult to obtain a high power factor, and the electromagnetic noise is r...

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Problems solved by technology

[0003] The permanent magnet synchronous motor in the form of concentrated winding has the advantages of simple manufacturing process and small axial space size. It will produce a large extreme leakage reactance, so it is difficult to obtain good low-speed operation ability (especially low-speed position sensorless start-up ability), the speed of the existing concentrated winding air-conditioning compressor can only be above 15% of the maximum speed and low-speed load running, and it is difficult to obtain a high power factor, and the electromagnetic noise is relatively large

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