A simplified model predictive control for open-winding PMSM

Abstract

This paper proposes a simplified model predictive control (MPC) for open-winding permanent magnet synchronous motor (OW-PMSM) system with two isolated power sources. According to the relationship between the torque and flux in PMSM, the two control constraints, torque and flux, in conventional MPC are converted into an equivalent flux vector, which eliminates the weighting factor in the cost function. In addition, in order to reduce the computational burden of the conventional MPC, an improved prediction algorithm and a novel voltage selection scheme are proposed to select the optimal voltage vector using twice evaluation. Simulation results are presented to prove the effectiveness of the proposed method.