Open-Circuit Fault-Tolerant Control for DTP-SynRM Based on Rotation Coordinate Transformation

This article proposes an open-circuit fault-tolerant strategy for a dual-three-phase synchronous reluctance motor (DTP-SynRM) based on rotation coordinate transformation. A DTP-SynRM vector space decoupling model is established to achieve complete decoupling of voltage, current, and flux equations. Then, the influence of the fault state on the current and the torque fluctuations of the motor is analyzed. The proposed fault-tolerant strategy converts the second harmonic of the current through rotational coordinate transformation, thereby directly controlling the second harmonic of the current using a proportional–integral regulator in the new coordinate system. The simulation results prove the analysis and the effectiveness of the proposed strategy.