A hybrid rotor continuous pole permanent magnet synchronous motor and a method for reducing its torque ripple

Abstract

The invention discloses a hybrid rotor continuous pole permanent magnet synchronous motor and a method for reducing its torque ripple; a hybrid rotor continuous pole permanent magnet synchronous motor comprises: an outer stator and an inner rotor; the outer stator has five Phase-distributed armature winding; there are surface-embedded permanent magnets and spoke-type permanent magnets on the inner rotor; a method for reducing the torque ripple of a hybrid rotor continuous pole permanent magnet synchronous motor, which specifically includes: first, by increasing the permanent magnet motor reduce the torque ripple; then, by optimizing the pole arc coefficient and thickness of the surface-embedded permanent magnet and the length and width of the spoke permanent magnet, the torque ripple is reduced again; then, the angular deviation of the spoke permanent magnet shift, further reducing torque ripple. The motor overcomes the disadvantages of the traditional continuous pole permanent magnet synchronous motor, such as large torque ripple, large eddy current loss of permanent magnets and easy demagnetization of permanent magnets when overloaded, while maintaining the characteristics of high torque density and high utilization rate of permanent magnets of the original motor.

Description

technical field [0001] The invention relates to the design of a hybrid rotor continuous pole permanent magnet synchronous motor, in particular to a method for reducing torque ripple of a hybrid rotor continuous pole permanent magnet synchronous motor, belonging to the technical field of motor manufacturing. Background technique [0002] Nowadays, permanent magnet synchronous motors have been widely used, and they play a very important role in many fields from automobiles to aerospace. This is mainly due to several salient features of permanent magnet synchronous motors, including high torque density, high efficiency, and small weight and volume. The permanent magnet synchronous motor uses a magnetic material with a high magnetic energy product to replace the traditional excitation winding, which not only eliminates the negative impact of the excitation winding, but also simplifies the mechanical structure of the motor, which improves the reliability of the motor and reduces ...

AI Technical Summary

Problems solved by technology

The eddy current loss of the permanent magnet of the traditional continuous pole permanent magnet synchronous motor is large, and the permanent magnet is prone to demagnetization when overloaded. Therefore, it is very meaningful and necessary to reduce the eddy current loss of the permanent magnet and enhance the anti-demagnetization ability of the permanent magnet to improve the efficiency and reliability of the motor.

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