The characteristic evaluation of the method to improve the voltage phase resolution of model predictive control for current control system of PMSM

This paper describes new model predictive control for high performance current control system of PMSM. The current control system based on FCS-MPC decides an inverter output voltage directly by searching. In a principle, this type controller can use not only PWM drive but also overmodulation and square wave drive[1]. However, conventional current control based on FCS-MPC is inferior to PWM modulated PI base control in the steady control performance for the reason of this method that the voltage phase resolution is coarse. The improvement of the voltage phase resolution of FCS-MPC can't realize by the restriction of the equipment. So, we have proposed new model predictive control to improve the voltage phase resolution not depending the limitation of the device[2], [3]. In this paper, we evaluate the characteristics of propose method comparing conventional current control based on FCS-MPC by the simulation and experimentation.