Unequal tooth width combined permanent magnet synchronous motor and electromagnetic vibration weakening method thereof

Abstract

The invention discloses an unequal tooth width combined permanent magnet synchronous motor and an electromagnetic vibration weakening method thereof. The unequal tooth width combined permanent magnetsynchronous motor comprises a stator, a permanent magnet rotor and armature windings, the stator sleeves the permanent magnet rotor, and the permanent magnet rotor is coaxially arranged with the stator. The stator comprises stator slots, stator teeth and a stator yoke part, the stator yoke part is annular, the stator teeth are uniformly distributed along the circumference of the stator yoke part.The stator slots are arranged between the stator teeth, and the armature windings are arranged in the stator slots. The width of at least one stator tooth in the stator teeth is different from the widths of other stator teeth, and the widths of other stator teeth are the same. According to the invention, the cogging torque and the tooth harmonic electromotive force of the permanent magnet motor are greatly reduced by adopting the stator with the unequal tooth width combined structure, so that the motor can have smaller torque pulsation; the torque ripple weakening effect equivalent to that ofa stator skewed slot can be achieved by changing the width of the motor stator tooth, and the torque ripple is weakened by replacing a stator skewed slot or rotor skewed pole method 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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