Structure optimization design and fault simulation of permanent magnet synchronous direct drive motor

In this paper, the finite element model of permanent magnet synchronous direct drive motor in train traction drive system is established. Based on the mechanism of two types of faults, a fault motor is modeled and simulated, the joint-simulation of motor and circuit is carried. Firstly, according to the actual requirements of the project, the motor model is established based on ANSYS RMxprt module, and the parametric scanning of the model is carried out to realize the structural optimization of the motor. On this basis, the developed model is imported into ANSYS Maxwell module to calculate the electromagnetic field, and two typical faults, demagnetization (caused by current) and eccentric-city, are injected to study the influence of motor fault. Finally, through the joint-simulation with ANSYS Simplorer, the correctness of the model and the feasibility of joint-simulation are verified, which provides a new idea for the research of fault evolution of traction transmission system.