The steady current characteristics of the voltage phase resolution of model predictive modulated current vector control for PMSM

Abstract

We have proposed new Model Predictive Control which can design the voltage phase resolution and average switching frequency independently for improving steady control performance. Our propose method is based on FCS-MPC, the controller decides switching timing of each phase during control period directly by predicting future current behaviors at each prediction period and evaluate each behaviors. Shortening prediction period can improve steady current control performance, however, calculation amounts of prediction become huge and interfere with implementation. So, our method needs understanding the characteristics of voltage phase resolution and the necessary voltage phase resolution in each operation point for realizing a same level steady current control performance of PI base current vector control using PWM. In this paper, we describe the steady current characteristic of the voltage phase resolution of our method.