Analysis of Iron Loss for Permanent Magnet Synchronous Motor Driven by PWM

The motor heating is closely related with the motor loss, thereby affecting the lifetime and performance of motor. So accurately calculating the motor loss is one of the key technology to study the heating and improve the working performance of the motor. In order to explore the influence of iron loss on permanent magnet synchronous motor (PMSM) driven by pulse width modulation (PWM) inverter, a model of two-dimensional field-circuit coupled time-stepping finite element method (FEM) for a PMSM was established in this paper, based on the theory of electromagnetic field. By changing the inverter parameter of modulation ratio and switching frequency respectively, clear its impact on the iron loss of motor, and accurately determine the distribution of iron loss under the control of PWM inverter. Finally, the finite element simulation results were compared with the experimental results, which verified the correctness of the simulation data. Finally, through constructing the experimental test platform and comparing the calculated results and experimental data, verified the accuracy of the calculation results and the solving method.