Modeling and Simulation of the In-wheel Motor Applied in Electric Vehicle

摘要

To study the ride comfort of in-wheel motor electric vehicle, it is necessary to analyze the speed ripple and torque ripple of motor. Thus, the motion differential equation of PMSM (permanent magnet synchronous motor) is presented in this paper. Based on the vector control principle of motor and the rotor-field-orientated control, a double closed loop controlled PMSM simulation model is built through Sim Power System Toolbox. After that, the simulation analysis of the running process of motor uninfluenced and influenced by load is carried out in Matlab/Simulink. Then the performance curves of speed, torque, and stator current of motor are obtained from the simulation analysis. As last, an in-wheel motor test system is established to verify the simulation results. The research results indicate that the built motor models can reflect the running status of real motor and the existent phenomenon of motor torque ripple has been verified, which provides a basis for the further researches on the effect of motor torque ripple on the vertical vibration of vehicle suspension.