Permanent magnet synchronous motor with unequal tooth width combination and its electromagnetic vibration weakening method

Abstract

The disclosure discloses a permanent magnet synchronous motor with unequal tooth width combination and its electromagnetic vibration weakening method, a stator, a permanent magnet rotor and an armature winding. The permanent magnet rotor is sleeved inside the stator and arranged coaxially with the stator; The stator includes stator slots, stator teeth and a stator yoke, the stator yoke is annular, the stator teeth are evenly distributed along the circumference of the stator yoke, stator slots are arranged between the stator teeth, and the stator slots are placed Armature winding; among the stator teeth, at least one stator tooth has a width different from that of other stator teeth, and the other stator teeth have the same width. The present disclosure greatly reduces the cogging torque and tooth harmonic electromotive force of the permanent magnet motor by adopting the stator with unequal tooth width combination structure, so that the motor can have smaller torque ripple; by changing the width of the stator teeth of the motor, that is The torque ripple weakening effect equivalent to that of the stator skew can be achieved, and the torque ripple can be weakened by replacing the stator skew or rotor skew in the industry.

Description

technical field [0001] The disclosure relates to the technical field of electromagnetic vibration weakening of permanent magnet synchronous motors, in particular to a permanent magnet synchronous motor with unequal tooth width combination and an electromagnetic vibration weakening method thereof. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] In recent years, with the improvement of high temperature resistance and price reduction of permanent magnet materials, permanent magnet motors have been widely used in national defense, industry, agriculture and daily life, and are moving towards high power, high functionality and miniaturization. With the development, the varieties and application fields of permanent magnet motors continue to expand. At present, the power of permanent magnet motors ranges from a few milliwatts to thousands of kil...

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Problems solved by technology

The existence of cogging torque will increase the torque ripple of the permanent magnet motor, which is not conducive to the application of the motor in high-precision control occasions

[0006] At present, the method of stator chute or rotor slant pole is mainly used in industry to weaken the cogging torque and tooth harmonic electromotive force of permanent magnet motor, so as to achieve the purpose of weakening the torque ripple, but the method of slant pole or slant slot increases the The difficulty and cost of industrial manufacturing, and it is difficult to realize when the axial length of the motor is short

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