MOTOR DRIVE DEVICE

A motor drive device includes a converter, an inverter, a DC link capacitor, a dynamic braking circuit, current detectors, and an abnormality detector. The dynamic braking circuit includes a resistor and a switch provided between terminals of the motor, and performs braking of the motor by establishing the switch in an open state to disconnect between the terminals of the motor when driving the motor, and short-circuiting the terminals of the motor via the resistor with the switch in a closed state when stopping the motor. The current detectors detect the drive current of the motor. The abnormality detector detects, when driving the motor, abnormality of the dynamic braking circuit on the basis of the slope of the rise or fall of the drive current of the motor detected by the current detectors.