Patent ID: 9342017
Filing Date: 2016-05-17
CPC Classification: G03G

Claim Text:
1. A power supply apparatus comprising: a power switch directly connected to a direct current line, configured to be operated manually in order to perform power source shutdown, and generate an indication signal that indicates shutdown; a first conversion unit configured to convert alternating current supplied by an alternating-current source into direct current, and output the direct current independently of whether the power switch is in on or off; a second conversion unit configured to convert alternating current supplied by the alternating-current source into direct current to be supplied to a second load, without using the first conversion unit; a third conversion unit configured to convert alternating current supplied by the alternating-current source into direct current to be supplied to a first load, without using the first conversion unit; a first cutoff unit configured to terminate an operation of the first load by cutting off a supply of alternating current from the alternating-current source to the third conversion unit when the indication signal is input; a control unit configured to run upon being supplied with a direct current voltage output by the first conversion unit, execute shutdown processing for safely terminating an operation of the second load when the indication signal is input, and output a termination signal for terminating the operation of the second conversion unit when shutdown processing with respect to the second load is complete; and a second cutoff unit configured to terminate the second load by cutting off a supply of alternating current from the alternating-current source to the second conversion unit when the termination signal is input, wherein the first cutoff unit is further configured to cut off the supply of alternating current from the alternating-current source to the third conversion unit when one of the indication signal and the termination signal is input.