Patent ID: 8436562

Claim:
A bi-power motor controlling system, comprising: a motor; a system apparatus having a rotational-speed target value and outputting a first power and a second power, wherein the rotational-speed target value is used to determine a targeted rotational speed of the motor, and the first power is supplied to the motor; and a motor controlling apparatus electrically connected with the motor and the system apparatus, respectively, for receiving the second power, wherein the motor controlling apparatus detects a phase commutation of the motor to obtain a first rotational-speed value of the motor, adjusts a rotational speed of the motor to a second rotational-speed value in accordance with the first rotational-speed value, and generates a rotational-speed feedback signal to the system apparatus; wherein the system apparatus adjusts the outputted first power in accordance with the rotational-speed feedback signal to make the rotational speed of the motor reach the rotational-speed target value.