Power control apparatus for high-frequency dielectric heating and power control method for the same

A power control unit for high-frequency dielectric heating for controlling an inverter circuit for rectifying voltage of an AC power supply, modulating an on time of high frequency switching of a switching transistor, and converting into high frequency power, said power control unit for high-frequency dielectric heating comprising:

• an input current detection section for detecting input current from the AC power supply to the inverter circuit and outputting input current waveform information;
• a conversion section for converting the input current waveform information into a drive signal of the switching transistor of the inverter circuit so that instantaneous fluctuation of the input current waveform information is suppressed;
• and
• a mix circuit being connected between said input current detection section and said conversion section for mixing the input current waveform information and power control information for controlling so that current or voltage at an arbitrary point of the inverter circuit becomes a predetermined value and generating an on voltage signal,
• wherein the input current waveform information output from the input current detection section is directly input into the mix circuit.