Fast Response Deadbeat Current Control for PMSM

Abstract

Deadbeat Current Control (DCC) is an inverse-model based solution for Permanent Magnet Synchronous Motor (PMSM). The desired voltage vector is calculated by the current references. Thus, the command currents can be achieved by the end of each control period. DCC has the advantages of precise current tracking, constant switching frequency, non-overshoot, etc. However, if the desired current is physically infeasible to be obtained in one sampling period, it is a big challenge for DCC to select the best voltage vector to achieve the fastest current response. To deal with this problem, a novel technique is proposed in this paper. The best trajectory from the initial state to the reference is planned by using time-optimal algorithm. Along the best trajectory, the PMSM can reach the command currents in the minimum-time. The effectiveness of the proposed method is verified by simulation