Patent ID: 6900606

Claim:
A device for inrush current prevention and dynamic braking in a motor having a plurality of power inputting terminals, comprising: a diode rectifying unit rectifying power supplied from an AC power supplying unit; a capacitor smoothing the power rectified by the diode rectifying unit; a resistor disposed between the AC power supplying unit and the capacitor, being connected to the capacitor; an inverter, connected to first and second terminals of the capacitor and the power inputting terminals of the motor, inverting the smoothed power from the capacitor into an AC power having multiple phases and supplying the AC power having the multiple phases to the motor; a dynamic braking circuit short-circuiting the power input terminals of the motor; and a relaying unit including a first node to connect the dynamic braking circuit to the resistor and a second node connecting the rectifying unit to the capacitor in parallel.