Patent ID: 8499885
Filing Date: 2013-08-06
Classification: B62D,H02H,H02P

Abstract:
1. A motor drive apparatus comprising: a current instruction device that issues a current instruction value to drive a motor having a plurality of phases; a power transducer that includes a plurality of semiconductor switching elements, the power transducer converting power supplied from a power supply source and outputting the power to the motor; a power supply source switching device that is provided between the power supply source and the power transducer and performs one of electrical connection and disconnection between the power supply source and the power transducer; a power transducer failure detection device that detects a failure on the power transducer; a power transducer control device that controls driving of the power transducer according to the current instruction value and stops driving the power transducer when the power transducer failure detection device detects a failure on the power transducer; and a first switching control device that controls the power supply source switching device to make the power supply source switching device enter a regenerative conduction state when driving of the power transducer stops, the regenerative conduction state permitting conduction of a regenerative current from the power transducer to the power supply source.