Patent ID: 8761625
Filing Date: 2014-06-24
Classification: G03G,H05B

Abstract:
1. A fixing device comprising: a heat generating rotating member configured to include a heat generating layer; an exciting coil configured to inductively heat the heat generating layer; a degaussing coil configured to generate an electrical current in response to a magnetic flux generated by the exciting coil and to generate a magnetic flux in an opposite direction; an exciting coil controller configured to control energization of the exciting coil by using PWM signals; a degaussing coil controller configured to determine a necessity of switching the degaussing coil and to control energization of the degaussing coil; and a storage unit configured to store therein data of fixed values of OFF time periods of the PWM signals and minimum values of ON time periods of the PWM signals in relation to an ON/OFF state of the degaussing coil, the minimum values being set so as to prevent a failure of the fixing device, wherein