Patent ID: 8248011

Claim:
A method for driving a two-phase brushless motor comprising a rotator with permanent magnetism and a stator comprising a first coil and a second coil, the method comprising: activating the two-phase brushless motor; detecting an output voltage of a disabled coil of the first coil and the second coil to generate a detection result; comparing the detection result and a reference voltage to determine a commutation time point between the first coil and the second coil; generating a commutation signal according to the commutation time point; and driving the two-phase brushless motor according to the commutation signal; wherein the step of activating the two-phase brushless motor comprises: generating an activation signal; generating a temporary commutation signal according to the activation signal; respectively and temporarily enabling the first coil and the second coil according to the temporary commutation signal to generate an electromagnetic response signal; determining a starting position of the rotator according to the electromagnetic response signal; generating an activation commutation signal according to the starting position; and supplying power to the first coil or the second coil according to the activation commutation signal.