News

Sep 16,2020

High Power Density Configuration for Medium-Frequency Induction Furnaces

High Power Density Configuration for Medium-Frequency Induction Furnaces

Sep 17,2020

Constant Power Control for Medium-Frequency Induction Furnaces Used in Melting

During the melting process, the medium-frequency power supply will continuously and automatically track and control the maximum allowable cut-off value and pressure cut-off value.

Sep 18,2020

Application of Medium-Frequency Induction Furnaces for Heat Preservation

High-power molten iron preservation has traditionally been dominated by core-type power-frequency induction furnaces. The successful application of high-power coreless medium-frequency induction furnaces for high-power molten iron preservation represents a pioneering achievement in China. Currently, a 50-ton coreless medium-frequency furnace for molten iron preservation is already in operation.

Sep 19,2020

Application of the Dual-Source Power Control System for Medium-Frequency Induction Furnaces

A dual-source power control system is employed to enhance the melting rate of the medium-frequency induction furnace. An industrial-frequency rectifier transformer with equal or slightly larger capacity is used to power two variable-frequency power supply systems, which in turn supply power to two furnaces.

Sep 20,2020

Details of the high-voltage, power-frequency power supply for medium-frequency induction furnaces

As mentioned earlier, the high-voltage power supply for medium-frequency furnaces in large furnaces operates at power frequencies. With a power density of 600 kW/t, if the medium-frequency furnace exceeds 1 ton in capacity and is equipped with a power supply rated at 1250 kVA, it will use a 380 V power supply at power frequency to provide a DC output voltage.

Sep 22,2020

Application in the power supply system of medium-frequency induction furnaces

In the power supply system of medium-frequency induction furnaces, reactive power compensation and odd-harmonic mitigation technologies are employed. A thyristor-based parallel resonant frequency conversion power supply is utilized, and the power output is regulated by adjusting the firing angle of the SCRs.

Sep 23,2020

Common accidents involving medium-frequency furnace bodies

Common accidents involving medium-frequency furnace bodies include furnace leakage and melt-through.

Sep 24,2020

Application of Magnetic Yokes in Medium-Frequency Induction Furnaces

The magnetic yoke is made of silicon steel laminations and is evenly and symmetrically arranged around the induction coil.

Sep 25,2020

Common Maintenance Tips for Intermediate-Frequency Furnace Induction Heaters

1. The inductor of a medium-frequency induction heating furnace, also known as a through-type inductor, is designed according to the length of the heated workpiece and the diameter of the workpiece itself. However, in general, medium-frequency through-type inductors tend to be relatively long (referring to the axial direction of the workpiece being heated). The purpose of this longer design is to ensure that, while maintaining a constant heating rate, the temperature difference between the surface and the core of the workpiece remains within an acceptable range.

Sep 26,2020

Water Cooling Alarm System

The water-cooling system is the most important auxiliary system for medium-frequency furnaces and is generally divided into a furnace cooling system and an electrical cabinet cooling system. The coil of the medium-frequency furnace body is wound from square copper tubing. Although copper has a low resistivity, the current flowing through it is very high. Due to the skin effect, the current within the copper tubing tends to concentrate toward the side of the crucible wall, resulting in significant heat generation in the copper tubing (thus, the insulating varnish used on the surface of the copper tubing must possess high-temperature resistance).