What is the power loss of the induction coil of the induction melting furnace?

The induction coil is a key part of the induction melting furnace, and is the main body that transmits useful work to the heated or melted metal charge. Its ability to transmit depends on the strength of the magnetic field generated by the current passing through the induction coil, that is, the number of ampere turns of the inductor. In order to obtain a large heating power, the current flowing through the inductor is very large. Over the years, induction melting furnace manufacturers have been using the traditional induction coil and water cable cross-section production mode. Generally, the current density of the wire is greater than 25A/mm2. The cross section of the coil and water cable is small. Due to the influence of the power factor, the actual rated current of the furnace body is 10 times of the intermediate frequency output current after repeated measurements (capacitor full parallel type), and the copper loss is proportional to the square of the current. These will make the induction coil The water cable generates a large amount of heat, and the temperature further rises. A large amount of electric energy is converted into heat and is taken away and wasted by circulating water, so that the electric power loss in the inductor can reach 20% to 30% of the active power of the induction melting furnace.