HIGH FREQUENCY INDUCTION HEATING DEVICE AND HEATING METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To prevent a drastic decrease in treatment volume of one material by designing of a power supply device with a standard set on another material, concerning broad and narrow plates with large difference in voltage and current matching of a load circuit. SOLUTION: A resonant inverter is used at a power source part, an adjustment capacitor 28n is connected in parallel with a matching capacitor 26 carrying out matching with a heating coil, and at same time, a switching means 30n of conducting circuit is fitted to the adjustment capacitor. Capacity of the matching capacitor is to be variable by switching of the switching means according to kinds of metal plates as heating objects.