Mitsubishi Jukogyo Kabushiki Kaisha

Mamoru Hiyama

Kazuya Tsurusaki

Mitsuo Kato

Keiichi Katayama

Kiyoshi Izumi

Mikio Hanamoto

An induction heating apparatus is disclosed which includes a high frequency power source having a leading phase angle setting circuit, which is supplied with a detection voltage signal from an output side of a high frequency inverter connected to a load circuit, to supply a leading phase angle signal to gates of thyristors of the inverter. The high frequency power source further includes a phase control circuit, provided after the voltage detection circuit, which is supplied with the detection voltage signal from the output side of the inverter to periodically control a phase of the detection voltage signal. The induction heating apparatus further includes a series inductor provided in between the power supply bus line connected to an induction heating coil wherein a magnetic member is provided to be inserted into and taken out of the inductor. A drive device is included for driving the magnetic member. The induction heating apparatus includes a solenoid coil serving as an induction heating coil to which a high frequency current is supplied and into which a steel plate passes to be heated by Joule heat produced by an eddy current generated in the steel plate. Furthermore, magnetic flux density alleviating apparatus is provided in the solenoid coil for alleviating magnetic flux concentrated in an edge portion of the steel plate.

Growing community of inventors

Hiroshima, Japan

Mamoru Hiyama