Image forming apparatus that limits maximum power supplied to heating member for predetermined specific period of time when power supply to heating member is resumed

An image forming apparatus comprising:

• a fixing device including:
• a fixing member;
• a pressure member disposed to face the fixing member, the pressure member forming a nip portion between the pressure member and the fixing member into which a recording medium to be fixed is inserted;
• a heating member configured to heat the fixing member;
• and
• a temperature sensor configured to detect a temperature of the heating member or the fixing member;
• and
• a controller including a processor, the controller being configured to drive, by the processor executing a control program, the heating member using proportional-integral-differential (PID) control to bring the temperature detected by the temperature sensor to a predetermined target temperature,
• wherein the controller is configured to:
• cut off power supply to the heating member when the detected temperature has risen to a predetermined cutoff temperature higher than the target temperature and then resume power supply to the heating member when the detected temperature has fallen below the cutoff temperature;
• and
• perform the PID control while limiting a maximum power supplied to the heating member to an upper limit power, which is a power supplied to the heating member at a time when the detected temperature has risen to the cutoff temperature, during a period from when power supply to the heating member is resumed until a predetermined specific period of time elapses.