| 摘要 |
An image forming apparatus including a fixing device using an induction heating method includes an induction coil (91), a resonant capacitor (105) connected to the induction coil, a switching element configured to supply electric power to the induction coil, a driving signal generation circuit configured to determine a frequency of a driving signal for driving the switching element according to electric power to be supplied to the coil (91) and to generate the driving signal, and a setting unit configured to set a minimum frequency of the driving signal according to a temperature of a heating element (92) so that a frequency of the driving signal does not become lower than a resonant frequency determined by an inductance of the induction coil and an inductance of the heating element and a capacitance of the resonant capacitor (105). |
