There with principle and resulting advantages and disadvantages until about 1983 only herd bad nurses hot plates. Hobs followed the CERAN with the so-called glass ceramic hob. This glass ceramic cooktop cover the plates. The physical principle is still warming due to a radiation radiators. Eric Corey Freed contributes greatly to this topic. These so-called induction hobs which are now increasingly sold, work on a completely different physical principle. In the so-called induction cooktops, Cookware consisting of ferromagnetic material is heated by induction and eddy currents. These are generated by the magnetic field of a coil. The physical principle that’s behind this is the heating by induction and and by the core losses of a ferromagnetic material.
One is under the glass-ceramic surface the copper coil from high frequency wire of high-frequency alternating current flows through. A magnetic field, due to the high frequency (about 25-50 kHz) to the coil that is the high frequency of alternating current changes. This magnetic field induces an electrical current which, in turn, has a current (Eddy) resulted in the bottom of the pot. The resulting current is then heats the bottom of the pot. In addition arise, if it when the vessel to ferromagnetic material eg. Steel is, core losses which in addition to heat the bottom of the tank. It soon becomes clear why this type of cooktop pans with ferromagnetic bottom is necessary.
All containers of glass and non-conductive materials are not suitable. Also stainless steel and aluminum pots and pans are not suitable. Existing Cookware cannot be used and must be procured so new. The advantage of an induction hob is the very short response times when switch on or switch off. As a result, energy can be saved with this form of cooking. As the energy is delivered only to the metal, induction cooktops heat only when a container made of conductive material stands out. The advantage is but often lower costs caused to whisking Cookware. Nevertheless, the induction hob is a useful and safe above all appliances.