Patent ID: 6930293
Filing Date: 2005-08-16
Classification: G03G,H05B

Abstract:
1. An image forming apparatus which is capable of receiving either of a first and a second commercial power supply, each of the commercial power supplies having a different rated voltage, comprising: an image forming unit which forms an unfixed toner image on a sheet; a heat fixing unit which conveys under pressure a sheet bearing an unfixed toner image thereon for heat fixing said unfixed toner image to said sheet, said heat fixing unit including a rectifying circuit for rectifying a commercial power supply, an inverter power source circuit having an excitation coil receiving a high frequency current for induction heating a heat generating member, and a switching element for supplying said excitation coil with the high frequency current utilizing the output of said rectifying circuit; and a controller which controls a switching timing of said switching element in order to vary an output of said inverter power source circuit, wherein said controller limits a maximum output of said inverter power source circuit such that, in the case that a commercial power supply as a power supply source is said first commercial power supply, a consumption power of the image forming apparatus is a proximity of a power corresponding to a rated suppliable maximum current of the first commercial power supply at least under a certain condition, and in the case that a commercial power supply as a power supply source is said second commercial power supply, a consumption power of the image forming apparatus is a proximity of a power corresponding to a rated suppliable maximum current of the second commercial power supply at least under a certain condition.