Field-circuit coupled design and analysis for permanent magnet synchronous motor system used in electric vehicles

This paper presents a field-circuit coupled design and analysis method for the permanent magnet synchronous motor (PMSM) system used in electric vehicles. The time-stepping finite-element method is used to simulate the motor system, which integrates the electromagnetic field analysis of the motor prototype and the control algorithm of the drive system. A two-dimensional transient electromagnetic field model is built for a 15-kW PMSM in ANSYS Maxwell, and a double closed-loop vector control circuit model is set up in ANSYS Simplorer. The coupled simulation system is then obtained by integrating the two models. Transient simulation is conducted through field-circuit coupled analysis. The simulation results and the experimental results show a good consistency. The research of this paper provides a powerful tool for the PMSM system design.