Patent ID: 8278857

Claim:
A motor control device, being electrically connected with a motor, the motor control device comprising: a controller comprising a default value of time, wherein the controller detects the magnetic poles of the motor when the motor operates, so as to generate a magnetic pole detecting signal and output a first driving signal and a second driving signal; and a driving circuit electrically connected with the motor and the controller respectively, the driving circuit comprising a first switching element and a second switching element, the first switching element being for receiving the first driving signal, the second switching element being for receiving the second driving signal, and the first switching element and the second switching element being switched on or being switched off alternately according to the first driving signal and the second driving signal respectively, so as to interchange a direction of a current flowing through a coil of the motor and drive the motor to operate; wherein the controller switches off the first switching element by the first driving signal the default value of time before the controller switches on the second switching element by the second driving signal, and the controller switches off the second switching element by the second driving signal the default value of time before the controller switches on the first switching element by the first driving signal; and wherein the controller further comprises an error detecting unit for receiving the magnetic pole detecting signal, and the error detecting unit determines the motor is normal when the magnetic pole detecting signal is a pulse-width modulation signal of alternate high potential and low potential, and the error detecting unit determines the motor is abnormal when the magnetic pole detecting signal is a serial pulse-width modulation signal of high potential or a serial pulse-width modulation signal of low potential.