Power supply system and image forming apparatus

摘要

A power supply system for AC-DC conversion, includes: a first rectifying/smoothing circuit configured to rectify and smooth an AC voltage applied from an AC power supply; a switching power supply configured to perform voltage conversion on an output voltage of the first rectifying/smoothing circuit, and output the converted voltages; an accumulating unit configured to receive a charging current from the switching power supply; a detecting unit configured to detect input/cutoff of the AC power supply; and a control device configured to receive supply of electric power from the accumulating unit and stop the switching power supply if the detecting unit detects the cutoff of the AC power supply.

主权项

1. A power supply system for AC-DC conversion, comprising:
a first rectifying/smoothing circuit configured to rectify and smooth an AC power supplied from an AC power supply, and configured to supply a first DC power having a first voltage; a switching power supply configured to convert the first DC power having the first voltage received from the first rectifying/smoothing circuit to a second DC power having a second voltage, and configured to supply the second DC power; an accumulating unit configured to accumulate the second DC power supplied from the switching power supply; a detecting unit configured to detect input/cutoff of the AC power supply; and a control device configured to, in case that the detecting unit detects the cutoff of the AC power supply while the switching power supply is supplying the second voltage, control the switching power supply to stop supplying the second DC power.