Design Method of Flux Switching External Rotor Motor Based on Electrothermal Bidirectional Coupling

Abstract

The present invention discloses a design method of a flux-switching outer rotor motor based on electric heating two-way coupling. A two-dimensional finite element model and a -dimensional temperature field model are used, the multiple-physical-field joint simulation model of an electromagnetic field and a temperature field is established, the influence of temperature on motor driving performance caused by the influence of temperature on a motor material is considered, especially the influence of temperature on a permanent magnet steel material is considered, an electric heating two-way coupling analysis method is introduced, and the influence brought by a temperature factor ignored in a traditional design method is analyzed and obtained through iterative feedback analysis. The structural parameter of the motor is associated in the design process, a correction factor is analyzed and obtained by using two-way coupling so as to compensate the influence of the temperature on the motor driving performance, the stator inner diameter and stator pole arc coefficient of the motor are optimized through the obtained correction factor, thus a motor size is modified, and the requirement can be satisfied when the motor runs in a complex condition.

Description

technical field [0001] The invention belongs to the technical field of flux switching motors, in particular to an optimal design method of a flux switching outer rotor motor based on electrothermal bidirectional coupling. Background technique [0002] The drive motor is one of the key power components of an electric vehicle. Its performance directly affects the driving performance of the vehicle. It requires specific performances such as high power density, high torque density, high efficiency, and a wide speed range to meet the needs of electric vehicles. The operating requirements of different working conditions such as frequent acceleration and deceleration, climbing, and high-speed cruising. [0003] The flux switching permanent magnet motor is used in the field of electric vehicles. The permanent magnet steel with tangential alternate magnetization is embedded between the adjacent stators of the flux switching permanent magnet motor. On the one hand, a higher Torque an...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the influence of temperature on the driving performance is not considered in the design of the existing motor, to provide a design method of the flux-switched outer rotor motor based on the electrothermal bidirectional coupling, and to introduce the electrothermal bidirectional coupling analysis method to compensate for the temperature effect. The impact of the motor drive performance to meet the drive performance requirements of electric vehicles

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