Patent ID: 8324849

Claim:
A motor control apparatus, electrically connected to a motor, the motor control apparatus comprising: a current sensing module detecting at least one status of the motor so as to generate a current sensing signal; a phase modulating module electrically connected to the current sensing module for receiving the current sensing signal and generating a phase modulation signal in accordance with the current sensing signal; a duty cycle modulating module electrically connected to the phase modulating module for receiving the phase modulation signal and generating a duty cycle modulation signal in accordance with the phase modulation signal; and a driving module electrically connected to the duty cycle modulating module and the motor for receiving the duty cycle modulation signal and generating a rotation-speed control signal in accordance with the duty cycle modulation signal, wherein the rotation-speed control signal is output to the motor, wherein the phase modulating module generates a phase shifting value according to the current sensing signal, and then obtains the phase modulation signal by calculation according to the current sensing signal and the phase shifting value, a phase difference between the phase modulation signal and the current sensing signal is equal to a phase difference represented by the phase shifting value, and the phase modulating module verifies whether the phase shifting value actually responds the rotation speed of the motor by the current sensing module.