Patent ID: 8436568
Filing Date: 2013-05-07
Classification: B62D,G01R

Abstract:
1. A motor drive apparatus for driving a motor having a plurality of coil sets, the motor drive apparatus comprising: a plurality of inverter circuits provided for each of the coil sets for supplying electric power from a power source to the coil sets; a plurality of shut-off circuits connected to the power source through a power supply wire and to the inverter circuits for shutting off the power supply from a power source side to inverter circuit sides; and a control circuit including a switching control part, a conduction state check part and a wire-break determination part, the switching control part controlling switching-over of conduction and shut-off of the shut-off circuits, the conduction state check part checking whether the power is supplied to a motor side from shut-off circuits side with respect to each of the shut-off circuits, and the wire-break determination part determining that the wire between the power source and the shut-off circuits is broken, if more than a predetermined number of the shut-off circuits are determined to fail to supply power to the motor side, when the plurality of shut-off circuits are controlled to turn on by the switching control part.