The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 1988
Filed:
Apr. 07, 1987
Katsuharu Matsuo, Aichi, JP;
Teruya Tanaka, Yokkaichi, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
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.