Electric heating – Metal heating – Of cylinders
Patent
1987-04-07
1988-04-05
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1049R, H05B 606
Patent
active
047360828
ABSTRACT:
An object to be heated, such as a cooking utensil or vessel, is placed on a top plate. An inventer has a resonating circuit comprising an induction heating coil arranged below the top plate and a resonating capacitor connected to the coil, and a circuit for supplying high-frequency power to the resonating circuit in order to generate a high-frequency magnetic field from the induction heating coil and to induce an eddy current in the object to be heated. An inverter power level control data generating unit outputs inverter power level control data according to the relationship between the high-frequency power from the inverter circuit and a repulsion force acting on the object to be heated, based on the high-frequency power. The inverter power level control data is data for controlling the level of the high-frequency power from the inverter circuit so as to prevent the object to be heated from floating over a placing surface of the top plate, due to the repulsion force. A control unit feeds back the inverter power level control data from the control data generating unit to the inverter circuit.
REFERENCES:
patent: 3906181 (1975-09-01), Hibino et al.
patent: 3993885 (1976-11-01), Kominami et al.
patent: 4010342 (1977-03-01), Austin
Matsuo Katsuharu
Tanaka Teruya
Kabushiki Kaisha Toshiba
Leung Philip H.
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