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  • 0.25T induction melting furnac

    Induction melting furnace

    30t Induction melting furnace

    5T iron melting furnace

    3T iron melting furnace

    2T iron melting furnace

    1T iron melting furnace

    0.5T iron melting furnace

    0.5T steel melting induction f

    0.25T Series Intermediate Freq

    0.25T Parallel Intermediate Fr

    0.5T Series Intermediate Frequ

    0.25T intermediate frequency f

    1T Series Intermediate Frequen

    1T Intermediate Frequency Furn

    1T Parallel Intermediate Frequ

    2T Parallel Intermediate Frequ

    2T series intermediate frequen

    5T parallel intermediate frequ

    5T series intermediate frequen

    steel shell intermediate frequ

    Aluminum Shell Intermediate Fr

    0.5T Intermediate Frequency Fu

    0.5T Parallel Intermediate Fre

    Intermediate frequency furnace

    3T Series Intermediate Frequen

    3T parallel intermediate frequ

    1T Intermediate Frequency Furn

    Electric furnace repair
        

    The induction melting furnace power supply is difficult to start, the reactor vibration is large, and the sound is dull


    Fault phenomenon: It is difficult to start. After starting, the intermediate frequency voltage is more than double the DC voltage, and the DC current is too large.

    Fault analysis and processing are as follows:
     a. There is a thyristor damaged in the inverter circuit. When a thyristor is damaged in the inverter circuit, the device can sometimes be started, but the above failure phenomenon will occur after startup, replace the damaged thyristor, and check the cause of the damage.

     b. The inverter thyristor has a non-conducting, that is, "three legs" work. It is possible that the thyristor gate is open at this time, or the wires connected thereto are loose and have poor contact.

     c. The IF signal sampling loop has an open circuit or a polarity error. This reason is mostly caused by the intersection angle method, the intermediate frequency voltage signal is open or the polarity of the intermediate frequency voltage signal is reversed when repairing other faults.

      d. The inverter leads the front angle phase shifting circuit to malfunction. The load of the IF power supply is capacitive, ie the current is ahead of the voltage. In the sampling control circuit, a phase shifting circuit is designed, which may also be caused if the phase shifting circuit fails.

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    Tel:18037961302 Sales hot line ( 24 hours service): 18037961302
    E-Mail:firstfurnace@gmail.com
    Adress: Luoxin Industrial Park, Luoyang, Henan