E.g.o. Elektro-geraetebau Gmbh

E.g.o. Elektro-Gerätebau Gmbh

Steffen Lang

Stephane Lomp

Michael Eberle

Benigna Bechtold

Wolfgang Mohr

The invention relates to a heating circuit for induction heating coils of an induction cooking hob and to an induction cooking hob including such a heating circuit. In the heating circuit, there are in each case two auxiliary half bridges interconnected to excite a respective resonant circuit for an induction heating coil such that the resonant circuit is excited by a full bridge. Thereby, lost heat is considerably reduced. Via a connecting device the auxiliary half bridges can be controlled to excite induction heating coils, which are partly or fully covered by a cooking vessel.

Heating circuit and induction cooking hob

By performing a method for transmitting to a reading device data of a sensor that is allocated to an inductively heated cooking vessel, a high frequency control voltage is generated from a mains alternating voltage by means of a converter, wherein the high frequency control voltage is applied to an oscillator circuit having an induction heating coil in order to generate a high frequency magnetic alternating field for heating the cooking vessel. The method includes the steps: interrupting the applying of the high frequency control voltage to the oscillator circuit during a predefined first time region covering a zero crossing point of the mains alternating voltage in order to cause a self-resonant oscillation of the oscillator circuit; changing an impedance of an antenna that is inductively coupled to the induction heating coil, which antenna is allocated to the cooking vessel, in dependence upon the data of the sensor, which data is to be transmitted, during a second time region that lies within the first time region; and decoding the transmitted data of the sensor in the reading device, in that a resonant frequency, in particular a resonant frequency change, of the self-resonant oscillation of the oscillator circuit is evaluated.

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Oberderdingen, Germany

Steffen Lang