Cooking vessel for an induction cooking appliance

Claim 1

An induction cooking arrangement, comprising: an induction cooking appliance, including a square wave voltage generator, a series resonant circuit whose resonant frequency is lower than the frequency of the third harmonic of the fundamental frequency of said square wave voltage generator, a parallel resonant circuit coupled in series with said series resonant circuit, the resonant frequency of said parallel resonant circuit being substantially equal to the fundamental frequency of said square wave voltage generator and smaller than the resonant frequency of said series resonant circuit, and a cooking vessel including walls and a bottom, said bottom including an eddy current induction layer composed of a conductive, non-magnetic material coupleable to said parallel resonant circuit, the thickness of said eddy current induction layer for generation of a load phase displacement of approximately 20° to 40° between the square wave output voltage and the fundamental frequency component of the output current of said square wave voltage generator, the induction layer having one of a number of constructions with a specific electrical resistance less than 0.035×10 -6 Ωm or more than 0.035×10 -6 Ωm, and thinner than 0.2 mm for a construction whose specific electric resistance of the material of the eddy current induction layer is smaller than 0.035×10 -6 Ωm, and thicker than 0.2 mm for a construction whose specific electric resistance is greater than 0.035×10 -6 Ωm.