Fault position is determined by the melting furnace reactor sound

Symptom: The device can be started, but the voltage rise is not high. The reactor sound is particularly large and dull. When the voltage rises, it is unstable and has a trembling. There are overcurrent or overvoltage faults from time to time, and sometimes even the inverter tube is burnt out, but it is good to disconnect the rectifier circuit of the inverter circuit. Fault analysis and processing: Most of these faults are problems with the reactor. a . The inductance of the reactor is larger than normal, the magnetic circuit is saturated, the freewheeling filter is not used, and the current of the AC and DC terminals cannot be separated. The number of turns of the reactor coil is larger than normal. b . The air gap plate of the reactor is thinner than normal, and the inductance is increased. At this time, the air gap plate is thickened. c . The coil of the reactor has water seepage and the inter-turn insulation reduces the occurrence of sparking and discharging.