Key points of maintenance of intermediate frequency furnace
Analysis of common faults in intermediate frequency furnace 1) Fault phenomenon: The device cannot be started. Only the DC current meter has an indication when starting, and there is no indication of DC voltage and intermediate frequency voltage. Analysis: a. The inverter trigger pulse has a pulse phenomenon; b. Inverter thyristor breakdown; c. Capacitor breakdown; d. The load has a short circuit and grounding phenomenon; e. The intermediate frequency signal sampling loop has an open circuit or a short circuit. 2) Fault phenomenon: It is difficult to start. After starting, the intermediate frequency voltage is more than twice the DC voltage, and the DC current is too large. Analysis: a. The
The thyristor medium frequency induction heating power source uses a thyristor to convert three-phase power frequency AC power into single-phase AC power of several hundred or several kilohertz. It has the characteristics of convenient control, high efficiency, reliable operation and low labor intensity. It is widely used in the smelting of cast steel, stainless steel or alloy steel, vacuum smelting, heating of forgings and bending of steel pipes, extrusion molding, preheating of workpieces, steel. Surface quenching, annealing heat treatment, welding of metal parts, powder metallurgy, pipe heating for transporting high-temperature working fluids, crystal growth, etc. The working principle of
