The heat-proof ceramic panel is used as the cooker plane, and through the electrified coil under the plane th AC makes a magnetic field, which induces vortes in iron/stainless steel pan bottom and therefore heats the pan bottom quickly, and then conducts the heating to food.
The working precess is as follow : First the AC is turned into the DC through a rectifire, and then the DC will be turned into ultra sonic high frequency AC through high frequency electric power conversion device. By connecting the Hi-frequency AC to the flat hollow helical heating coil the High-Frequency alternating magnetic field will generate. Under the ceramic panel, the electricifed coil creates magnetic field breaking through the panel and induces vortex in the iron pan bottom, which can convert electric energy into heat energy while overcoming the internal impedance stream. The generated joule heat is the heat source for cooking.