Patent ID: 8970139
Filing Date: 2015-03-03
Classification: G11B,H02P

Abstract:
1. A motor drive device comprising: a power supply line to which a power supply voltage is applied; a ground line to which a ground voltage is applied; and a first motor driver that, when the power supply voltage is normal, rotates an N-phase first motor (where N is an integer of 2 or more) by using the supply voltage and, when the power supply voltage is abnormal, generates a rectified voltage from phase voltages of different phases appearing while the first motor is idling to regenerate the rectified voltage to the power supply line, wherein the first motor driver synchronously rectifies the phase voltages of the different phases in accordance with results of comparison between the phase voltages of the different phases, the rectified voltage, and the ground voltage when generating the rectified voltage, and wherein the first motor driver includes: