What is induction heating?
By help of eddy currents that are incurred by a changing magnetic field around an electrically conducting object (such as iron, copper and conductive metals), electrons are stirred and motivated in the object, generating heat against the resistance. This is how heat is transferred to the metal object from outside magnetic field that’s constantly changing at a certain frequency.
In turn, the frequently altering magnetic field is created and maintained by a surrounding work coil or electromagnet (which is also electrically conducting) that’s passing an alternating current (AC) at a certain frequency (either high frequency, medium frequency or low frequency).
Basically this is how induction heating comes to be. Depending on the heating requirements and the physical features of the workpiece, the shape of the work coil as well as the input of AC (voltage, current, frequency, etc.) vary.