Research on Vibration Characteristics of Permanent Magnet Motor of Electric Vehicle on different Control Strategies 2019-01-0166
In order to solve the energy and environmental crisis, electric vehicles and hybrid electric vehicles have developed rapidly around the world. The permanent magnet motor (PMM) is an important part of electric vehicle power system, which greatly affects the comfort of electric vehicles. This paper develops a multiphysics coupling model for permanent magnet motors. The vibration characteristics of permanent magnet motor are analyzed based on the multiphysics coupling model. Firstly, the control strategy model of permanent magnet drive motor for electric vehicles is established, parameters of the input current of PMM under different control strategies are obtained. Secondly, an electromagnetic simulation model is established by using finite element software, and the radial electromagnetic force is calculated by Maxwell stress tensor method. Thirdly, a finite element model of the stator structure considering the anisotropy of the core and the winding material is established and verified by modal test. Finally, the electromagnetic force simulation model is coupled with the structural model to establish the motor vibration simulation model, and the influence of different control strategies on the vibration characteristics of the permanent magnet motor are analyzed.