Remedy for open-circuit fault of 4-phase permanent magnet fault tolerant motor

With multiple single-phase lanes, and each driven by independent H-bridge power converters, permanent-magnet fault-tolerant motors inherently offer isolated phases and fault-tolerant capability. It is assumed that there is an open-circuit fault detected in the Phase A. In order to keep torque performance invariant during the faulty operation, a pertinent fault tolerant strategy is separately presented, derived and tested. Based on a series of experiments on a test bench, the effectiveness and validity of fault-tolerant capability and the strategy of the motor are verified.