Patent ID: 7146116

Claim:
A heat generating apparatus for an electromagnetic induction heating fixing apparatus of an image forming apparatus, comprising: a heat generating member; an exciting coil provided opposite to the heat generating member and serving to cause the heat generating member to generate heat by electromagnetic induction; a thermostat provided in the vicinity of the heat generating member and serving to stop supply of power to the exciting coil when a temperature abnormality of the heat generating member is detected; a power circuit comprising a rectifying circuit, a resonance circuit and a smoothing circuit and serving to control the supply of the power to the exciting coil, wherein the resonance circuit is connected in parallel with the exciting coil, one end of the smoothing circuit being connected to the resonance circuit and the exciting coil, and another end of the smoothing circuit being directly connected to the rectifying circuit; and a lead wire connecting the exciting coil, the thermostat and the power circuit, wherein the thermostat is electrically connected between the rectifying circuit and the smoothing circuit, and the lead wire connects to a connector comprising two pins that connect the exciting coil to the power circuit, and two pins configured to connect the thermostat to the power circuit, wherein one of the two pins configured to connect the thermostat to the power circuit is designated for a first supply voltage, and the other pin is designated for a second supply voltage, thereby preventing an erroneous connection of the exciting coil to the power circuit.