Induction cooking apparatus

Details Induction cooking apparatus Induction cooking apparatus

H - Electricity

05

B

327/19

H05B 6/06 (2006.01)

Patent

CA 1053761

ABSTRACT OF THE DISCLOSURE The invention relates to cool top induction heating for cooking. Solid state reciprocal power switches are used to incite a resonant power output circuit including the heating coil to be coupled to cooking utensil. A control signal which is a function of the Q of the coil, the direct current voltage applied to the power switches and the frequency of operation of the power switches is used to offset the power circuit from oscillating at resonance in order to control the power output. A solid state differential circuit is used responsive to a manual control signal establishing the level of power desired and to the control signal for regulation about the selected power level. The same differential circuit is controlled by a third control signal to insure low power at the start or in case of a failure of the power line. Minimum power output is provided at the lower end of the ultrasonic frequency spectrum without entering the audible range.

241196

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