Patent ID: 8471508

Claim:
A motor control apparatus electrically connected to a motor, the motor control apparatus comprising: a phase sensing circuit detecting a phase switching state of a magnetic pole of the motor when the motor is operating; a current sensing circuit detecting a current flowing through a coil of the motor to generate a current phase signal; a phase lock loop electrically connected to the phase sensing circuit and the current sensing circuit to receive the phase switching signal and the current phase signal respectively, wherein the phase lock loop compares a phase difference between the phase switching signal and the current phase signal so as to output a phase-switch controlling signal; a controller electrically connected to the phase lock loop for receiving the phase-switch controlling signal and then generating a driving signal in accordance with the phase-switch controlling signal; and a driving circuit electrically connected to the controller and the motor, wherein the driving circuit receives the driving signal and then controls the phase switching state of the magnetic pole of the motor to drive the motor to rotate in accordance with the driving signal.