Other

Jiro Oouchi

Hiroto Ohishi

A fixing device for an image forming apparatus includes an inverter circuit for induction heating. In the inverter circuit, a main switch Q drives one end of a work coil L whose other end is connected to a power source. A serial connection of a capacitor Cs and a subswitch Q is connected to opposite ends of the coil L in parallel such that one end of the capacitor Cs is connected to the power source E. A second capacitor C is connected to the subswitch Q in parallel. For a capacitance of 0.1 &mgr;F of the capacitor C , the factor of the coil L and that of the capacitor Cs are selected to be between 70 &mgr;H and 100 &mgr;H and between 1.8 &mgr;F and 5 &mgr;F, respectively. The inverter circuit is operable with optimal efficiency in the event of PWM (Pulse Width Modulation) control using a fixed frequency.

Growing community of inventors

Miyagi, Japan

Jiro Oouchi