induction melting furnace Fault phenomenon: In the boost load, the venting discharge is heated or even burned out.

 induction melting furnace Fault phenomenon: In the boost load, the venting discharge is heated or even burned out.
Fault analysis and treatment: There are three reasons for causing venting and venting heat.
    a. In the above example failure analysis, if the capacity of the series-parallel group capacitors is very different, the current of the DC charge release will increase, and if the capacity of the discharge and discharge is small, heat will be generated.
    b. The inverter pulse is asymmetrical. The requirement of the inverter for the inverter pulse is that the two groups of pulses are 180° out of each other. If the inverter pulses are not 180°, the positive and negative half cycles of the inverter output voltage are also inconsistent, resulting in the compensation capacitor being twice in one cycle. The charging time is inconsistent. When the capacitor is not discharged for half a week, the capacitor is charged for a short period of half a week, and a certain charge is accumulated on the capacitor. The greater the difference between the positive and negative half cycles of the inverter voltage, the higher the DC charge, and the greater the current flowing through the discharge and discharge. When the current reaches a level, the discharge feeling will cause heat or even burn. Therefore, when the venting and discharging sensation is hot, the symmetry of the inverter pulse must be carefully checked. If the asymmetry is concerned, the cause should be analyzed, the inverter pulse forming circuit should be checked, and the inverter pulse asymmetry phenomenon should be solved. In the inverter pulse forming circuit, the two pulse forming circuits are symmetrical. If the inverter pulse is asymmetrical, it may be caused by a change in capacitor capacity or resistance value, or it may be caused by a change in the internal parameters of the integrated circuit.
    c. There is a burnt out of the inverter thyristor. When an inverter thyristor burns out, the equipment can often be started. If the operating state of the equipment is not observed, the equipment is sick, and the IF output voltage waveform is a distorted waveform. From the above analysis, it can be seen that the current flowing through the discharge and discharge is large, causing it to heat up or burn out.


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