Motor control device and method of controlling the same

摘要

A motor control device including a preprocessing portion calculating a counter electromotive force using an analog operation is provided. The motor control device may include an offset compensation portion and a counter electromotive force measuring portion. The offset compensation portion receives a three-phase current signal from the motor and compensates an offset of the three-phase current signal. The counter electromotive force measuring portion receives the compensated current signal and a three-phase voltage signal from the motor and calculates the received current signal and the received voltage signal using an analog operation to provide the calculated result.

主权项

1. A motor control device comprising:
a preprocessing portion calculating a counter electromotive force of a motor using an analog operation, a component of the counter electromotive force corresponding to a current signal of three phase current signals and a voltage signal of three phase voltage signals; and a control portion driving the motor with reference to the counter electromotive force, wherein the preprocessing portion comprises:
an offset compensation portion receiving the current signal, compensating for an offset of the received current signal, and outputting the compensated current signal as a reference current signal; anda counter electromotive force measuring portion receiving the reference current signal, a reference clock signal, and the voltage signal, calculating the component of the counter electromotive force based on the received signals, and outputting a signal indicative of the calculated component of the counter electromotive force.