Motor control device

The invention discloses a motor control device, relates to the field of electronic circuits, and solves the problem of low adaptability caused by obtaining rotor position information through a position sensor. The current isolation amplification circuit receives a forward output signal and a reverse output signal of the motor, and outputs a current amplification signal to the bandwidth adjustment circuit; the bandwidth and gain adjusting circuit carries out filtering and gain adjustment on the current amplification signal and outputs an effective ripple signal to the comparison conversion circuit; the comparison conversion circuit is used for comparing the effective ripple signals and generating PWM (Pulse-Width Modulation) signals; and the controller is used for receiving the PWM signals and counting the PWM signals to obtain the working position of the motor. According to the application, the amplified analog signal ripples are converted into the PWM signals, and the controller counts the PWM signals and de