Patent ID: 8866424
Filing Date: 2014-10-21
Classification: H02P,Y02B

Abstract:
1. A motor driving device, which comprises: a drive signal generating unit configured to generate a motor drive signal for driving a motor; a current control unit disposed at a front of the drive signal generating unit and configured to control a current of the drive signal generating unit so as to prevent noise and vibration of a motor caused by electromagnetic interference generated when a switch of the drive signal generating unit is turned on/off; and a driving unit configured to drive the motor based on the motor drive signal outputted from the drive signal generating unit, wherein the drive signal generating unit comprises a resistor and a transistor that are connected in series, and wherein the current control unit comprises: a comparator configured to generate a comparison signal by comparing a sense voltage of the drive signal generating unit sensed by a node disposed between the resistor and the transistor with a predetermined reference voltage; and a switch configured to be switched based on the comparison signal outputted from the comparator.