Patent ID: 7289745
Filing Date: 2007-10-30
Classification: G03G

Abstract:
1. An image forming apparatus usable when connected to an alternating-current power supply, comprising: an image forming unit to form an image on a predetermined recording medium; a fixing unit connected to the alternating-current power supply in such a manner as to thermally fix the image formed on the recording medium by the image forming unit; a general control unit to control the whole image forming apparatus including the image forming unit and the fixing unit; and a power supply system which supplies power to the image forming unit, the fixing unit, and the general control unit, the power supply system comprising: a direct-current power supply whose primary side is connected to the alternating-current power supply and whose secondary side is connected to a load and which supplies a direct-current power; a power control unit for to control power supply of the fixing unit; and a current detector to detect a current on the secondary side of the direct-current power supply to output a secondary-side current detection signal to the power control unit, the power control unit being constituted in such a manner as to control the power to be supplied to the fixing unit based on the secondary-side current detection signal of the direct-current power supply, the signal being output from the current detector.