Patent ID: 8188700
Filing Date: 2012-05-29
Classification: H02P

Abstract:
1. An apparatus for driving a sensorless motor, the apparatus comprising: a receiver for acquiring a control signal, wherein the control signal comprises information of a predetermined rotational speed; a starter for supplying and progressively increasing energy to the sensorless motor after the control signal is acquired, so as to rotate a rotor of the sensorless motor; a detector for detecting a position of the rotor after the energy is supplied to the sensorless motor; and an electrical controller for gradually regulating the energy after the position of the rotor is detected, so that the sensorless motor is maintained at the predetermined rotational speed, wherein the electrical controller comprises: a reduction module for progressively decreasing the energy supplied to the sensorless motor when a rotational speed of the sensorless motor exceeds the predetermined rotational speed after the position of the rotor is detected until the rotational speed of the sensorless motor conforms to the predetermined rotational speed: a maintenance module for regulating the energy to be constant when the rotational speed of the sensorless motor conforms to the predetermined rotational speed, so that the sensorless motor is maintained at the predetermined rotational speed; and an enhancement module for progressively increasing the energy supplied to the sensorless motor when the rotational speed of the sensorless motor is lower than the predetermined rotational speed after the position of the rotor is detected until the rotational speed of the sensorless motor conforms to the predetermined rotational speed.