Induction heating is heating by electrical energy that is induced into the load through an alternating electromagnetic field. It makes use of the transformer affect, in which an alternating current (AC) voltage placed on one winding will produce an AC voltage on another winding.
The work coil in an induction heater is the primary winding of a transformer. The load acts as a short-circuited secondary winding. The voltage established on the load makes current flow in in the load. That current flowing against the inherent electrical resistance in the material of the load generates heat. Induction heating is in reality resistance heating; in essence, it is electrical current flowing against inherent electrical resistance.
A material which is to be inductively heated must be at least a fair electrical conductor. This is why the proccess is applicable to all metals, and selective or continuois heating is the primary goal.
Induction heating is unique in its ability to produce heat within a charge
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