System and method for fault protection of a motor

摘要

An exemplary motor driving system 10 includes a power source 11, a driving circuit 17, a controller 21, a motor 19, and a protection circuit 23. The driving circuit 17 including at least one switching device 18 coupled with the power source 11. The motor 19 includes a plurality of windings. The motor 19 is coupled with the driving circuit 17 and driven by the driving circuit. The controller 21 is configured to provide first switch signals to the at least one switching device of the driving circuit in a normal mode. The protection circuit 23 is coupled with the controller 21, and 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 18 of the driving circuit 17 so as to reconstruct circuit loops between the driving circuit and the plurality of windings. A method for operating the motor driving system is also described.