What is the working principle of high frequency induction melting furnace?

What is the working principle of high frequency induction melting furnace?

High frequency induction melting furnace main working principle: the high frequency of high frequency large current flows to be made around the circular or other shape of the heating coil (usually with copper control). Thus produce polarity in the coil and the instant change of strong magnetic bundle, such as the metal is heated objects placed in a coil, a magnetic beam will through the whole heated objects, in the interior of the heated object and heating current in the opposite direction, will produce relatively large eddy current. There is resistance because of the heated object, it will produce a lot of joule heat, the temperature of the object itself rapidly rising. To achieve the purpose of to all metal material heat.