Parallel resonant induction cooking surface unit

Details Parallel resonant induction cooking surface unit Parallel resonant induction cooking surface unit

H - Electricity

05

B

327/19

H05B 6/08 (2006.01) H05B 6/12 (2006.01)

Patent

CA 1163685

RD 11482 PARALLEL RESONANT INDUCTION COOKING SURFACE UNIT ABSTRACT OF THE DISCLOSURE A parallel resonant induction cooking surface unit comprises a voltage fed inverter which drives a load circuit, comprised of a main induction drive coil, a tuning capacitor coupled in parallel with the main induction drive coil, and an inductor coupled in series with the main induction drive coil, with a square wave voltage causing the main induction drive coil to generate a time variant magnetic field, resulting in eddy currents being induced in the surface of a metallic, food-containing utensil positioned adjacent to the main induction drive coil, and hence causing utensil heating. By tuning the load circuit to resonance at or near the square wave frequency, reactive currents therein are minimized, resulting in improved power factor. Moreover, resultant main induction drive coil voltage and current are nearly sinusoidal, thereby achieving reduced electro- magnetic interference radiation at frequencies greater than the square wave frequency.

366579

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