Predictive Current Control for an IPMSM Drive with a Small Film DC-Link Capacitor

This paper investigates a small film DC-link capacitor inverter driving a permanent magnet synchronous motor. Two control methods, including a d-q axis current control and a positive torque region current control are proposed to improve the torque dynamics of the drive system. In addition, a damping compensation method is used to improve the input power factor and reduce the input current harmonics. A current-loop predictive controller is proposed to improve the dynamic responses of the current-loop of an IPMSM. A digital signal processor, TMS 320LF2808, is used as a control center to execute the control algorithms. Experimental results can validate the correctness and feasibility of the proposed methods.