POWER SUPPLY DEVICE AND METHOD FOR CONTROLLING POWER SUPPLY DEVICE

摘要

A power supply device includes: a DC power supply circuit which supplies DC power to a first battery; a smoothing capacitor connected to an output side of the DC power supply circuit; a voltage conversion circuit; a control unit which controls the voltage conversion circuit; an input voltage detection unit which detects an input voltage of the voltage conversion circuit; a switch which electrically connects or disconnects the first battery to the power supply device; and a control stopping unit which stops voltage conversion control, in a case where the input voltage is less than a first voltage reference value. In a case where the switch is switched off, after the voltage conversion control is continued for a predetermined time such that electric charges charged in the smoothing capacitor are discharged by a predetermined amount, the control stopping unit stops the voltage conversion control.

主权项

1. A power supply device which charges a battery and converts a DC voltage into another DC voltage, said power supply device comprising:
a DC power supply circuit which supplies DC power to a first battery; a smoothing capacitor which is connected to an output side of the DC power supply circuit; a voltage conversion circuit which converts a voltage output from the DC power supply circuit into another voltage, and which supplies DC power to a second battery; a control unit which controls a voltage conversion of the voltage conversion circuit; an input voltage detection unit which detects an input voltage of the voltage conversion circuit; a switch which electrically connects or disconnects the first battery to the power supply device; and a control stopping unit which stops voltage conversion control performed by the control unit, in a case where the input voltage detected by the input voltage detection unit is less than a first voltage reference value, wherein in a case where the switch is switched off, after the voltage conversion control performed by the control unit is continued for a predetermined time such that electric charges charged in the smoothing capacitor are discharged by a predetermined amount, the control stopping unit stops the voltage conversion control performed by the control unit.