A New Fault-Tolerant Control Strategy for Open-Winding Drive System Under Single Leg Open-Circuit Fault

In this paper, a new fault-tolerant control strategy is proposed for open-winding fault-tolerant fractional-slot concentrated winding interior permanent magnet synchronous motor (FTFSCW-IPMSM) driving system under single leg open-circuit fault based on decoupled SVPWM and superimposed current injection. When the fault occurs, the faulty inverter is reconstructed to three-phase four-switch mode, a new simplify decoupled SVPWM algorithm is proposed. To eliminate the deviation of midpoint voltage of capacitor, a PI regulator is designed. The effectiveness of the proposed strategy is verified by the simulation and experimental results.