Patent ID: 6291950
Filing Date: 2001-09-18
Classification: G11B,H02P

Abstract:
A motor drive system comprising:a control voltage output portion receiving a first control voltage and a second control voltage from an external servo, and outputting a voltage that is proportional to a difference between the first and second control voltages;a driver receiving the voltage output from the control voltage output portion via a non-inversion terminal and receiving feedback signals through an inversion terminal to generate drive signals for a motor;a commutation distributor outputting ON/OFF signals such that the motor is optimally driven, the ON/OFF signals being output according to hole signals of each phase of the motor that are input externally;a power transistor, which is ON/OFF controlled according to an output of the driver to supply the drive signals to the motor;an output current detector detecting the drive signals output from the power transistor and converting the drive signals into a voltage, and outputting an output voltage; anda voltage amplifier, a voltage gain of which is varied by an external pin, the voltage amplifier amplifying the output voltage of the output current detector to supply the voltage as the feedback signals to the driver.