When the inverter circuit breaks down, it is considered that the medium frequency protection circuit is started and the inverter circuit is damaged.

The most common fault phenomenon of medium frequency furnace in use is that it cannot be started normally. The following lists the common causes and detection methods of failure to start:

The refractory commonly used as neutral furnace lining is high alumina refractory, which belongs to aluminum silicate refractory, and the content of Al2O3 is more than 46%. 

Refractories with melting point higher than 1700 ℃ can be classified into six categories according to chemical composition: oxides, carbides, nitrides, sulfides, borides and chemical elements.

IGBT will be exposed in the maintenance of switching power supply, so how to measure the quality of IGBT with Multimeter? There are three steps to measure the quality of IGBT with a multimeter:

Yoke usually refers to soft magnetic materials that do not produce magnetic field (magnetic line of force) and only transmit magnetic line of force in the magnetic circuit. Yoke is generally made of soft iron, A3 steel and soft magnetic alloy with high permeability. In some special occasions, yoke is also made of ferrite materials.

The total efficiency of the induction heating system, that is the ratio of the power obtained on the workpiece to the input power of the power supply, is related to the following four factors:

a 5T medium frequency furnace always burns KK thyristor (2500A / 3000V) and always burns the same thyristor. What’s the matter?

Induction heating equipment with high relative power and low frequency shall be selected for large workpieces, bars and solid materials; For small workpieces, pipes, plates, gears, etc., induction heating equipment with low relative power and high frequency shall be selected.

In the process of induction heating, the power loss mainly includes the following three aspects:

During the use of medium frequency furnace, the induction coil is often burned through. There are two main reasons: one is that the induction coil is burned through due to the overflow of molten iron after the furnace lining is burned through; Second, during pouring, the operation is careless or the furnace mouth is too short, and the splashed molten iron adheres to the induction coil to burn it through.

During the use of the medium frequency furnace, sometimes the electric furnace inductor will ignite between turns and leak water.