The four-phase permanent-magnet fault-tolerant motor is designed with a degree of inherent fault-tolerant capability and continuous operation in the occurrence of faults, due to their concentrated windings and interleaved by faulttolerant teeth. According to H-bridge and star-connection topologies, the direct torque compensation method and invariance of rotating magnetic force method are respectively adopted, so as to keep torque performance invariant pre- or post-fault operation for single short-circuit winding. Both the strategies are derived, compared and analyzed. Finally, the field-circuit simulation results are given to show the effectiveness of the theoretical analysis.