A motor driving system, comprising: a power source; a driving circuit coupled with the power source, the driving circuit comprising at least one switching device and a DC/AC inverter comprising a plurality of bridge legs, each bridge leg comprises a upper switch and a lower switch, the plurality of upper switches are commonly coupled to a high-voltage terminal of the power source, the plurality of lower switches are commonly coupled to a low-voltage terminal of the power source, a corresponding junction (176, 178) between the upper switch and the lower switch is coupled with a corresponding winding of the motor, and each switching device of the DC/AC inverter is coupled with an anti-parallel diode; the driving circuit further comprising a DC/DC converter (177, 183, 185, 187) which comprises a H bridge, a first inductor, and a second inductor, wherein the H bridge comprises a first upper switch and a first lower switch coupled in series in a left bridge leg and a second upper switch and a second lower switch coupled in series in a right bridge leg; the first inductor is coupled between a high-voltage terminal of the power source and a junction between the first upper switch and the first lower switch; and the second inductor is coupled between the high-voltage terminal of the power source and a junction between the second upper switch and the second lower switch; a motor coupled with the driving circuit, the motor comprising a plurality of windings and driven by the driving circuit; a controller configured to provide first switch signals to the at least one switching device of the driving circuit in a normal mode; and a protection circuit coupled with the controller, configured to generate second switch signals based at least in part on a fault signal in a fault mode and provide the second switch signals to the at least one switching device of the driving circuit so as to reconstruct circuit loops between the driving circuit and the plurality of windings, characterized in that in the fault mode the first switch signals provided by the controller are blocked; and the second switch signals generated by the protection circuit comprise a turn-off signal, an open signal, and a turn-on signal, wherein the turn-off signal is provided to switches of the DC/AC inverter; the open signal is provided to the at least one contactor; and the turn-on signal is provided to both of the first upper switch and the second lower switch or both of the second upper switch and the first lower switch of the H bridge to conduct the first inductor and the second inductor with the windings of the motor. a power source; a driving circuit coupled with the power source, the driving circuit comprising at least one switching device and a DC/AC inverter comprising a plurality of bridge legs, each bridge leg comprises a upper switch and a lower switch, the plurality of upper switches are commonly coupled to a high-voltage terminal of the power source, the plurality of lower switches are commonly coupled to a low-voltage terminal of the power source, a corresponding junction (176, 178) between the upper switch and the lower switch is coupled with a corresponding winding of the motor, and each switching device of the DC/AC inverter is coupled with an anti-parallel diode; the driving circuit further comprising a DC/DC converter (177, 183, 185, 187) which comprises a H bridge, a first inductor, and a second inductor, wherein the H bridge comprises a first upper switch and a first lower switch coupled in series in a left bridge leg and a second upper switch and a second lower switch coupled in series in a right bridge leg; the first inductor is coupled between a high-voltage terminal of the power source and a junction between the first upper switch and the first lower switch; and the second inductor is coupled between the high-voltage terminal of the power source and a junction between the second upper switch and the second lower switch; a motor coupled with the driving circuit, the motor comprising a plurality of windings and driven by the driving circuit; a controller configured to provide first switch signals to the at least one switching device of the driving circuit in a normal mode; and a protection circuit coupled with the controller, configured to generate second switch signals based at least in part on a fault signal in a fault mode and provide the second switch signals to the at least one switching device of the driving circuit so as to reconstruct circuit loops between the driving circuit and the plurality of windings, characterized in that in the fault mode the first switch signals provided by the controller are blocked; and the second switch signals generated by the protection circuit comprise a turn-off signal, an open signal, and a turn-on signal, wherein the turn-off signal is provided to switches of the DC/AC inverter; the open signal is provided to the at least one contactor; and the turn-on signal is provided to both of the first upper switch and the second lower switch or both of the second upper switch and the first lower switch of the H bridge to conduct the first inductor and the second inductor with the windings of the motor.