Patent ID: 8502489

Claim:
A motor control device having input ports for receiving at least two emergency stop signals, and drive-controlling a motor based on PWM signals, the motor control device comprising: an LSI for generating the PWM signals; a PWM signal transmission circuit for transmitting the PWM signals generated by the LSI; a drive circuit for generating inverter drive signals based on the PWM signals transmitted from the PWM signal transmission circuit; and an inverter circuit having a P-side power switching device and an N-side power switching device, the inverter circuit generating motor drive signals based on the inverter drive signals, the motor drive signals being applied to individual phase windings of the motor, wherein the drive circuit includes a P-side drive circuit for driving the P-side power switching device and an N-side drive circuit for driving the N-side power switching device; one of the emergency stop signals is inputted to the P-side drive circuit and the PWM signal transmission circuit; another of the emergency stop signals is inputted to the N-side drive circuit and the PWM signal transmission circuit; the PWM signal transmission circuit stops transmitting the PWM signals in response to receipt of any of the emergency stop signals; and the drive circuit stops outputting the inverter drive signals in response to the receipt of any of the emergency stop signals.