Abstract: The present invention provides a motor control device, which comprises a signal control circuit having an input pin to output different motor drive signals according to input electronic signals. The signal control circuit is also protected for over current and over voltage. Two switch circuits of brake before make configuration are connected to the signal control circuit. An inverter is arranged between the two switch circuits. The inverter switches the motor drive signal among the two switch circuits and transmits it to a driver, which is connected to a motor drive circuit. A power source circuit is connected to the motor drive circuit to provide electricity for the motor drive circuit. A back electromotive force (back EMF) component for detection and control of the rotation speed of motor is disposed in the driver. The motor control device of the present invention has the advantages of reduced number of pins and shrunk volume.

Abstract: The present invention provides a motor control device, which comprises a signal control circuit having an input pin to output different motor drive signals according to input electronic signals. The signal control circuit is also protected for over current and over voltage. Two switch circuits of brake before make configuration are connected to the signal control circuit. An inverter is arranged between the two switch circuits. The inverter switches the motor drive signal among the two switch circuits and transmits it to a driver, which is connected to a motor drive circuit. A power source circuit is connected to the motor drive circuit to provide electricity for the motor drive circuit. A back electromotive force (back EMF) component for detection and control of the rotation speed of motor is disposed in the driver. The motor control device of the present invention has the advantages of reduced number of pins and shrunk volume.