Power Supply Device

Abstract

In a power supply device including a plurality of converters connected in parallel, in a determination mode, a lifespan determination unit stops an operation of a target converter to be subjected to lifespan determination, while keeping the other converters in operation, and determines whether the target converter has reached an end of life based on a degree of decrease in voltage caused by discharging of a smoothing capacitor of the target converter. When there is a deteriorated converter having reached the end of life in the determination mode, the lifespan determination unit shifts the operation mode to a restriction mode, the restriction mode being a mode of restricting an output of the deteriorated converter.

Dependencies are inferred from the claim text.