Induction Hob

The induction coil already published makes a changing magnetic field, and the induction motor uses one to drive currents in a rotor. The cooking rung uses the same trick to heat the pan itself: no element, no flame, and a cold top - the pan is the only thing that gets hot. **US 4,169,222**, "Induction cook-top system and control", Raymond M. Tucker, assigned to Rangaire, filed 26. July 1977, granted 25. September 1979: mains rectified to DC, switched into induction heating coils under a non-metallic top, with the power set by the switching. **A mains hob is never opened or built here.** You build a LOW-VOLTAGE induction heater from a 12–24 V module and measure which metals it can heat - which is exactly why some pans work on a hob and others do nothing.