Motor control apparatus

A motor control apparatus includes a phase sensing circuit, current sensing circuit, phase lock loop, controller and driving circuit. The phase sensing circuit detects a phase switching state of a magnetic pole of a motor circuit, then generates and outputs a phase switching signal to the phase lock loop during motor operation. The current sensing circuit detects current flowing through a coil of the motor to generate and output a current phase signal to the phase lock loop. The phase lock loop compares a phase difference between the phase switching signal and the current phase signal to generate and output a phase-switch controlling signal to the controller. The controller generates and outputs a driving signal to the driving circuit in accordance with the phase-switch controlling signal. The driving circuit controls the phase switching state of the magnetic pole to drive the motor in accordance with the driving signal.