| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of controlling an induction heating apparatus by which a supply power can be stably supplied to an induction heating coil as a normal direction power by avoiding an overvoltage and an overcurrent of an inverter caused by influences of mutual induction.SOLUTION: There is provided an induction heating apparatus 10 in which inverters 20 (20a and 20b) by a single-phase bridge are respectively connected to circuits in each of which a resonance capacitor is connected in series to each of a plurality of induction heating coils 12 (12a and 12b) that are mutually induced, by each arm in which an IGBT 26 and a diode 28 are connected in antiparallel. The induction heating apparatus 10 has a power supply comprising smoothing capacitors 30 each connected in parallel to each inverter 20. In the inverters 20, frequencies of output currents Ifrom the respective power supplies are made be accorded with each other. The induction heating apparatus 10 includes minor loops 21 (21a and 21b) which directly control upstream voltage regulators 22 (22a and 22b) so that power supply currents Idc flowing into parallel circuits of the inverters 20 and the smoothing capacitors 30 are a predetermined value or more in a normal direction. |
