High frequency power transmission in plural induction heating load circuits

In high-frequency induction heating systems with operating frequencies ranging over megahertz, the system needs a particular frequency power supply for each load circuit in order to feed the different frequency powers into the plural load circuits. To solve this problem, a power transmission method that feeds the different frequency powers into plural resonant load circuits selectively using only one set of power supplies was devised. Theoretical and the experimental results are presented for a system composed of a voltage-fed inverter, a parallel resonant load circuit, and a series resonant load circuit connected in series by a distributed constant line