The output power of the induction furnace power supply must meet the maximum power of the induction furnace, and the output power can be easily adjusted. This is because the life of the crucible of the induction furnace is usually about 10-20% of the rated power, and the crucible lining must be rebuilt, Then increase the power by 10% every certain time until the rated power. In addition, during the furnace process, when the charge is melted, the composition of the charge must be tested. In order not to make the charge boiling violently after melting, the medium frequency power supply must reduce the output power to keep the charge warm. In view of the above situation, it is required that the SCR medium frequency power supply can be easily adjusted from 10% - 100% of the rated output power.

This is because when the furnace charge is in the melting process, once the equipment fails, the crucible will be damaged seriously. Therefore, the induction furnace is required to work reliably, and it must also have the necessary voltage and current limiting protection, over-voltage and over-current protection, water cut-off protection and other automatic protection devices. In addition, the success rate of induction furnace start-up should be high, and the start-up and stop operation should be convenient.

Output frequency requirements of induction furnace. The relationship between electric efficiency and frequency of induction furnace is related. The output frequency can be determined from the electrical efficiency. For example, we call this frequency fo. The inductor is actually an inductive coil. In order to compensate the reactive power of the coil, capacitors are connected in parallel at both ends of the coil, which forms the LC oscillation circuit. When the output frequency f of the inverter is equal to the natural oscillation frequency Fo of the induction furnace loop, the power factor of the loop is equal to 1. The induction furnace will get the maximum power. It can be seen from the above that the natural oscillation frequency of the circuit is related to the values of L and C. generally, the value of compensation capacitance C is fixed, while the inductance L changes due to the change of the magnetic conductivity of the burden. For example, during steelmaking, the magnetic conductivity of the cold furnace steel is very large, so the inductance L is larger. When the temperature of the steel reaches the Curie point, the magnetic conductivity of the steel is 1, so the inductance L decreases, Therefore, the natural oscillation frequency Fo of the induction furnace circuit will change from low to high. In order to make the induction furnace always get the maximum power in the smelting process, it requires that the output frequency f of SCR medium frequency power supply can change with the change of fo, and always keep the frequency automatic tracking.

Yiphee Electric Furnace Co.,Ltd specializes in producing induction smelting furnace.Tel(WhatsApp):+86-13450756789, yiphee@yiphee.cn