This equipment uses high frequency induction heating, induction heating technology Induction heating is a fast, efficient, accurate and repeatable new method of non-contact heating or other conductive materials. How exactly does induction heating work? It helps to have a basic understanding of the principles of electricity. When an alternating electrical current is applied to the primary of a transformer, an alternating magnetic field is created. According to Faraday's Law, if the secondary of the transformer is located within the magnetic field, an electric current will be induced. In a basic induction heating setup shown in, a solid state RF power supply sends an AC current through an inductor (often a copper coil),and the part to be heated (the workpiece) is placed inside the inducto.
eBay