Abstract: To ensure that permanent magnet synchronous machine drive systems can operate reliably once faults of phase current sensors occur,a fault-tolerant control method is proposed.The permanent magnet synchronous machine drive system was controlled by the id???0 control method with the modulation strategy of hysteresis current control.Based on a mathematical statistical method,a new concept of reliability was defined,by which faults of phase current sensors were analyzed.Based on two selection principles,the minimum absolute value of the phase current error（MSVCE） method was proposed to ensure that all three phase currents could be renewed in every two adjacent sampling periods if faults of phase current sensors occur.The MSVCE-based fault-tolerant control method was compared with the normal control method.Based on Matlab/Simulink and dSPACE1103,simulation analysis and experiment verification were carried out respectively.The effectiveness and reliability of the proposed fault-tolerant control method are verified by both the simulated and experimental results.