| 摘要 |
PURPOSE:To generate a synchronous high frequency between plural induction heater coils at low cost with a simple structure. CONSTITUTION:A high frequency current is carried to plural induction heating coils 4 and 15 by turning on and off corresponding respective switching elements 5 and 16, and induction heating is performed. In this case, a voltage waveform generated from a resonance circuit composed of the prescribed induction heater coil 4 and a capacitor C5 is separated, and one is smoothed, and the other is kept as it is, and both are compared with each other. Switching time is also determined not only in the corresponding switching element 5 but also in the other switching element 16. |
