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Medium frequency Steel-shell furnace If the startup is abnormal, what could be the reasons behind it? Let me explain these reasons to you now.

Correcting phase deficiency:

The fault manifests as abnormal noises during the company’s operational process, with the maximum output voltage failing to reach its rated value and the power cabinet emitting increasingly loud extraneous sounds. At this point, we can use an oscilloscope to reduce the output voltage to around 200 volts and observe the waveform of the rectifier’s output control voltage signal (the oscilloscope should be positioned synchronously with the power supply development). During normal operation, the intermediate frequency... Steel-shell furnace The input and voltage/current waveforms each have six cycles per period; during phase loss, two waveforms will be missing.

Work arm inverter:

The fault display shows an exceptionally high output current, and the noisy electrical cabinet is located in the same medium-frequency area. Steel-shell furnace When working in the middle, you'll notice that once the high voltage exceeds the normal intermediate-frequency output, the power supply starts to cut off at a lower level. An oscilloscope is used to sequentially observe the voltage signal waveforms across the anode-cathode protection circuits of the four inverter thyristors. If it's the working branch, the inverter will display waveforms from two adjacent, normally conducting thyristors. As for the other two adjacent thyristors, not only are their waveforms different, but one of them is a sine wave. This triggers the KK2 barrier, and the waveform between the anode and cathode becomes a sine wave. At the same time, KK2 remains non-conductive, and KK1 does not turn off; therefore, there is no waveform at the end of KK1.

Induction control coil failure:

The induction current coil is medium frequency. Steel-shell furnace The load for the system power supply is made from square copper tubes 3–5 millimeters thick. The common drawbacks are as follows:

Leakage in the induction coil can cause sparks between coils, so timely repair welding is crucial for safe operation.

Steel molten metal adheres to the induction control coil, and the intensely hot red slag can cause the copper tubing to burn through. Therefore, the environment must be cleaned promptly and effectively.

To properly analyze and troubleshoot faults in medium-frequency furnaces, it is essential to be familiar with the characteristics and causes of common problems encountered in these furnaces. This will help avoid unnecessary detours, save working time, quickly eliminate faults, restore the medium-frequency furnace to normal economic operation, and thereby ensure the smooth continuation of safe production.