Multi-phase permanent magnet motor high-frequency vibration rapid analysis method and inhibition strategy thereof

Abstract

The invention discloses a multi-phase permanent magnet motor high-frequency vibration rapid analysis method and an inhibition strategy thereof. The method comprises the following steps: S1, analyzingand calculating current harmonics of the PWM inverter power supply multi-phase permanent magnet motor; S2, calculating electromagnetic force borne by each tooth of the motor stator by using a magneticconductance distribution characteristic function method; S3, performing two-dimensional Fourier decomposition on the electromagnetic force borne by the motor stator, selecting a zero-order electromagnetic force high-frequency component as a reference quantity, and indirectly analyzing the high-frequency vibration of the motor. Compared with an existing circuit and electromagnetic field simulationanalysis method, the high-frequency vibration rapid analysis method for the multi-phase permanent magnet motor is clear and visual in physical concept, high in calculation efficiency and high in universality. By applying the high-frequency vibration rapid method of the multi-phase permanent magnet motor, a high-frequency vibration suppression strategy based on carrier phase shift is determined, counteracting of motor high-frequency electromagnetic force introduced by PWM is achieved, and then high-frequency electromagnetic vibration noise of the motor is suppressed.

Description

technical field [0001] The present application relates to the technical field of permanent magnet motors, in particular, to a fast analysis method for high-frequency vibration of multiphase permanent magnet motors and a suppression strategy thereof. Background technique [0002] Permanent magnet motors have the advantages of high power density, high efficiency, simple structure, and easy control, and have been widely used in various power levels. [0003] Multi-phase permanent magnet motors have more winding phases, and the armature reaction magnetomotive force has a higher sinusoidal degree. have inherent advantages. By optimizing the structure design of the motor and improving the control algorithm, the motor can have superior low-frequency vibration and noise characteristics. Therefore, multi-phase permanent magnet motors have been used in fields with high vibration and noise performance requirements such as naval propulsion, high-precision servo systems, and electrifie...

AI Technical Summary

Problems solved by technology

However, for other polyphase motors with winding forms, the strategy of carrier phase shifting is not yet clear

[0010] In summary, the existing analysis and calculation methods cannot fully meet the requirements of calculation accuracy, and a lot of preparatory work is required before the calculation, making it difficult to balance accuracy and speed

And the existing carrier phase shift strategy is mainly aimed at the special winding form where two sets of windings are arranged in the same slot. This carrier phase shift strategy is not the optimal carrier phase shift strategy for multi-phase motors.

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