Current Measurement suitable for Current Control System of PMSM based on Model Predictive Control

This paper describes current control system of PMSM based on Model Predictive Control (MPC) and discusses the relationship of its performance and current measurement method. A controller based on MPC predicts the current behavior, then directly selects the voltage vector of inverter based on evaluation of these predicted behavior results. So, we have focused the possibility of MPC, which makes it possible to drive machines seamlessly between linear operating region of inverter and the overmodulation operating region. We have proposed current control system of PMSM based on MPC and shown through simulation that it is possible to expand the drive range and improve the current transient response by utilizing overmodulation operating region of inverter. In this paper, a steady state performance of the proposed current control system based on MPC is evaluated by experiments and discusses the current measurement methods suitable to the proposed MPC.