Using the material of induction heating effect and make the material heating or melting furnace. The basic components of an induction furnace is made of copper pipe winding induction coil. Alternating current voltage on both ends of the induction coil, alternating electromagnetic field, conductive material in the induction coil, eddy current electromagnetic induction in the material due, by the resistance effect and make the electrical energy into heat energy to heat the material; So, induction heating can be thought of as a kind of direct heating electrical resistivity.
The characteristics of the induction heating is a shift in the heated material of electric power (current distribution is very uneven, surface, the biggest center is smallest, is called the skin effect. In order to improve the heating efficiency of induction heating, power supply frequency should be appropriate, small melting furnace or on the surface of the material using high frequency electric heating, large melting furnace or heating for material deep by intermediate or electric power frequency. Induction coil inductance is pretty big load, the power factor is generally low. In order to improve the power factor, general parallel intermediate frequency or high frequency capacitor, induction coil, called resonant capacitance. Smaller gap between the induction coil and material, appropriate USES square were made with copper, induction coil, the tube is cooled, induction coil turn-to-turn clearance to small, better insulation. Induction heating equipment, mainly for steel, copper, aluminum and zinc and other heating and melting, heating fast, burning less, mechanization and automation degree is high, suitable for configuration on the automatic production line.