MOTOR DRIVING DEVICE AND BRAKING CONTROL METHOD PERFORMED BY THE SAME

Provided are a motor driving device and a braking control method performed by the same. The motor driving device according to this disclosure includes a direct current (DC) link capacitor configured to store DC power, and an inverter including a plurality of upper switches and a plurality of lower switches, and configured to convert the DC power stored in the DC link capacitor into AC power according to a switching operation and supply the AC power to a motor. In addition, the motor driving device includes a shunt resistor connected to the plurality of lower switches, and configured to sense current flowing through the inverter and detect whether the current has reached threshold current for controlling a regenerative voltage during a braking operation; and a control unit configured to control an operation of the inverter and perform a regenerative operation when the braking operation is started. The control unit, during the regenerative operation, controls the inverter and the motor to switch motive power of a load connected to the motor into regenerative energy and transmit the regenerative energy to the DC link capacitor, by controlling active component current and reactive component current together in response to the reaching of the threshold current. Accordingly, an inverter damage may be prevented and braking time may be effectively reduced during generative braking.