Fault-tolerant control method for short-circuit faults of five-phase permanent magnet motors based on the principle of constant power

Abstract

A 5-phase permanent magnetism motor short circuit fault tolerance control method based on a power constant principle belongs to the multi-phase fault tolerance permanent magnetism motor field, and solves the problems that a common 5-phase PMSM motor is poor in a motor torque output capacity and large in torque fluctuations when one phase of the winding has short circuit failure; the method can adjust the current of other non-short circuit phase when the motor has end short circuit fault, thus keeping the output power of the motor unchanged; when the motor has switch tube short circuit faults,the switch tubes of same positions of opposite bridge arms are conducted, and the current of other non-short circuit phase is adjusted, thus keeping the output power of the motor unchanged; the methodcan weaken the influences on the motor by short circuit faults of inverter switch tubes, thus reducing the subsequent fault tolerance control difficulty.

Description

technical field [0001] The invention belongs to the field of multi-phase fault-tolerant permanent magnet motors, and relates to short-circuit fault fault-tolerant technology. Background technique [0002] Since the 21st century, with the rapid development of science and technology and economy, the increasingly serious environmental pollution and energy crisis have become the main factors restricting human development. A series of problems such as exhaust pollution, noise pollution and energy waste caused by traditional fuel vehicles cannot be ignored. The development of new energy vehicles is urgent. Among them, pure electric vehicles have attracted social attention due to their advantages of zero emission and zero pollution. For pure electric vehicles, the motor is an important part. When the motor fails and loses its normal operation ability, the pure electric vehicle will not be able to continue driving. Therefore, it is necessary to study high-performance fault-tolerant ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of weak motor torque output capability and large torque fluctuation when the winding of a conventional five-phase permanent magnet synchronous motor is short-circuited in one phase, and provides a five-phase permanent magnet motor based on the principle of constant power Fault Tolerant Control Method for Short Circuit Fault

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