Discharge control device

A discharge control device comprising:

• an inverter that is interposed between a high voltage DC power source and an AC device to carry out power conversion between DC and AC;
• a smoothing capacitor that is interposed between the high voltage DC power source and the inverter to smooth a voltage between positive and negative electrodes on the DC side of the inverter;
• a low voltage DC power source that is connected in parallel to the smoothing capacitor, generates a DC power having a lower voltage than the high voltage DC power source, and supplies the DC power having the low voltage to a target device different from the inverter;
• a discharge circuit that is connected between the positive and negative electrodes of the low voltage DC power source, between the target device and the low voltage DC power source;
• and
• a discharge control unit that controls the discharge circuit to execute discharge control of discharging electrical charges of the smoothing capacitor;
• wherein
• the discharge circuit is configured by a series circuit including a discharging resistor and a discharge control switch;
• and
• the discharge control unit controls the discharge control switch to a non-conducting state during non-discharge control in which the discharge control is not executed, and controls the discharge control switch to a conducting state during execution of the discharge control.