Simulation of PMSM vector control system based on propeller load characteristic

In this paper the implementation of the vector control systems for a variable-speed 4088kW PMSM (Permanent Magnet Synchronous Motor)in ship electric propulsion systems has been studied. At the basis of analysis of the mathematical model of the PMSM and the principle of vector control, two methods for modeling and simulating of PMSM system based on the Current Hystersis PWM (Pulse Width Modulation) and SVPWM (Space Vector Pulse Width Modulation) are proposed. Then the speed control performance of the 4088kW propulsion motor with propeller load was proved by simulation. The results show that the system have good response performance in the process of the motor start or speedup and the method used SVPWM can reduce the torque ripple compared with the Current Hystersis PWM.