Induction furnace is a furnace that takes advantage of the material of induction heating effect and make the material heating or melting.The basic components of the induction furnace is made up of induction coil winded by copper pipe.Alternating current voltage on both ends of the induction coil, producing alternating electromagnetic field, conductive material in the induction coil, producing eddy current in the material with electromagnetic induction, by the resistance effect and turn the electrical energy into heat energy to heat the material; So, induction heating also can be thought of as a kind of directly heating type electrical resistivity.
Distribution is very uneven, surface is the biggest and center is smallest, that is called the skin effect.In order to improve the electrothermal efficiency of induction heating, power supply frequency should be appropriate, small size melting furnace or surface heating of the material using high frequency electric heating, large-scale melting furnace or deep heating for material by intermediate frequency or electric power frequency.Induction coil is a load that inductance is pretty big, the power factor is generally low.In order to improve the power factor, generally induction coil parallel connection intermediate frequency or high frequency capacitor, is called resonant capacitance.Smaller gap between the induction coil and material, induction coil should be made up of square red copper tube, the tube is cooled, induction coil turn-to-turn clearance to small as far as possible, better insulation.Induction heating equipment, mainly for heating and melting for steel, copper, aluminum, zinc and other metals, heating fast, burning less, high degree of mechanization and automation, suitable for configuration on the automatic production line.