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Fault phenomenon: the equipment cannot be started. When starting, only DC ammeter has indication, and DC voltage and intermediate frequency voltmeter have no indication.
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%.
Luoyang shennai Power Equipment Co., Ltd. held the annual meeting of the new year in the head office on January 25, 2022 (Chinese Lunar New Year).
Induction melting furnace is divided into molten metal materials
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 induction melting furnace must inspect the electrical equipment, the water cooling system ( closed-loop cooling tower ) , the inductor copper tube, etc. before the furnace is opened .
In the forging workshop, industrial furnace smelting metals include cupola, induction furnace, electric resistance furnace, electric arc furnace, vacuum furnace, open hearth furnace, kiln furnace, etc.; sand-type drying furnace with bake sand type, iron alloy oven and casting annealing furnace; In the workshop, there are various heating furnaces for pre-forging heating of steel ingots or billets, and heat treatment furnaces for stress relief after forging; in the metal heat treatment workshop, various annealing, normalizing, quenching and tempering heat treatments for improving the mechanical function of the workpiece Furnace; in the welding workshop, pre-weld preheating furnace and post-weld tempering furnace with weldments;
The most effective method for the failure of the intermediate frequency furnace is to use a small current experiment to judge whether the rectifier circuit is faulty or part of the inverter fault. When the DC current is less than 513 volts