Patent ID: 8164290
Filing Date: 2012-04-24
Classification: H02P

Abstract:
1. A motor control device, which is electrically connected with a motor and an alternating current power source, the motor control device comprising: a converting circuit electrically connected with the alternating current power source, wherein the converting circuit receives a voltage of the alternating current power source and converts the voltage of the alternating current power source to be a voltage of direct current which is defined as a first voltage, and then the first voltage is outputted by the converting circuit; a step-up unit electrically connected with the converting circuit for receiving the first voltage and generating a second voltage according to the first voltage; a first voltage detecting unit electrically connected with the converting circuit for detecting the first voltage and outputting a first voltage reference signal according to the first voltage; a second voltage detecting unit electrically connected with the step-up unit for detecting the second voltage and outputting a second voltage reference signal according to the second voltage; and a motor controlling circuit electrically connected with the motor, the first voltage detecting unit and the second voltage detecting unit, respectively, the motor controlling circuit being for receiving the first voltage reference signal and the second voltage reference signal from the first voltage detecting unit and the second voltage detecting unit and calculating the difference between the first voltage reference signal and the second voltage reference signal, and the motor controlling circuit generates a driving signal according to the second voltage reference signal for driving the motor to operate when the difference between the first voltage reference signal and the second voltage reference signal exceeds a predetermined voltage value built-in the motor controlling circuit.