Dynamic Simulation of Permanent Magnet Synchronous Motor Fed by Voltage Source Inverter

The main purpose is to study the dynamic process of three-phase permanent magnet synchronous motor (PMSM) fed by voltage source inverter. Through adopting the a-b-c stator static model and the rotor single-loop d-q model, the mathematical model applied for dynamic simulation of three-phase permanent magnet synchronous motor is established. The no-load direct starting process of the system fed by SPWM (sinusoid pulse-width modulation) voltage inverter is simulated and analyzed. The starting process of the system under the conditions of different load torque, moment of inertia and DC voltage are simulated. The simulation results show that the model is reasonable and the PMSM control system runs with fast response and small torque. The simulation wave accords with the theory research and PMSM system runs stable. It provides algorithm of PMSM control system improving with theoretical basis.