To provide an induction heating device for performing PID control so as to supply stable power at good response without relating to magnitude of power supplied to an exciting coil, and to provide a fixing device and an image formation device.
A change rate (feedback rate) of frequency of high frequency current includes the following three formulae: (1) Mvn=Kp×(En-En1)+Ki×En+Kd×{(En-2En1+En2)}; (2) Δf=Mvn×f(p); and (3) f(p)=A×P+B. Here, the Mvn is not set up to be a feedback rate by using the formula (1) only like a conventional way, and the Mvn is converted by using the formulae (2) and (3) so that the change rate of the frequency of the high frequency current is lessened when detected power of the exciting coil is high and the change rate of the frequency of the high frequency current is enlarged when the detected power of the exciting coil is low.
| JP2005347132A | 2005-12-15 | |||
| JPH06111929A | 1994-04-22 |
Masataka Otani
Tanaka rice