H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/26
H05B 6/06 (2006.01) H05B 6/12 (2006.01)
Patent
CA 1208302
"Induction Heating Apparatus Utilizing Output Energy for Powering Switching Operation" ABSTRACT An induction heating apparatus comprises a rectifier (2) for rectifying A voltage from an AC mains supply, a resonance circuit formed by an induction heating coil (4) and a capacitor (4), a semiconductor switching device (6) connected in circuit with the resonance circuit to the output of the rectifier, a diode (7) coupled in anti-parallel relationship with the switching device (6), and a circuit (17; 117, 118) for driving the switching device into conduction at a controlled frequency. Further provided is a transformer (14) which derives a low frequency energy from the AC mains supply (1). A second coil (9) is electromagnetically coupled with the heating coil (4) for deriving a high-frequency energy. The low- and high-frequency energies are coupled by diodes (10, 11, 15, 16; 132, 133) to the driving circuit to provide power neccesary to effect the conduction of the switching device.
434909
Mizukawa Takumi
Ogino Yoshio
Ohmori Hideki
Yoshida Hirokazu
Matsushita Electric Industrial Co. Ltd.
Robic Robic & Associes/associates
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