Induction Heating

A process of heating by electrical induction. Heat is generated within an electrically conductive body placed in alternative electromagnetic field by means of eddy currents (due to Joule losses) as well as due to hysteresis losses (in the case of heating a magnetic body). With induction heating there is no contact between induction coil and heated body as the electromagnetic field is generated by an induction coil that is placed in close proximity to a heated body. The depth to which the currents penetrate, called penetration depth, is dependent on the frequency of the magnetic field as well as the electrical resistivity and magnetic permeability of the heated material. The frequency of the electrical supply must be chosen to suit not only the application but also the product material and its size and form.