Torque Ripple Reduction of Model Predictive Controlled Five-Phase PMSM Drives With Open-Circuit Faults

Abstract

In this article, a fault-tolerant model predictive current control method is proposed to improve the fault-tolerant ability of a five-phase permanent synchronous magnet motor drive under single and multiple open-circuit faults operations. On the principle of the optimal current control, general reference currents are derived to suppress torque ripples. To obtain the reference currents, a Fast Fourier Transformation-based current estimation model is established. The torque ripple can be reduced by modifying the reference currents in the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">d3-q3</i> axis transformed from the estimation model. Finally, experimental results validate the effectiveness of the developed fault-tolerant control strategy and the robustness against operating points and motor parameter mismatches.