Why is the water-cooled melting furnace not afraid of seeing through the ground?
The two parts of the smelting furnace , the first part: the circulating water of the electric cabinet, this part of the circulating water is mainly circulated in the jacket of the capacitor and the thyristor, and the environment of the water circulation itself is insulated from the electric cabinet (see the sides of the thyristor carefully) The insulation mechanism), which first ensures the insulation between the circuit and the cabinet, and why there is no short circuit in the circuit part, which is to say the two parts of the melting furnace circuit and the characteristics of the thyristor, rectification and inverter The two circuits have the same characteristics. The trigger is used to turn the thyristor on or off. During this period, when it is conducting, the negative is in the off state, and when it is negative, it is in the off state. Unless the thyristor is broken or the trigger mechanism fails, the positive and negative poles will never be short-circuited. Of course, the frequency of conduction and shutdown is very high. It can be observed by an oscilloscope. You can see that by looking at the melting furnace fault, either Rectification or inversion, if the thyristor is broken, there will be a large chance of burning and melting, and there will be other faults, which is followed by For a breakdown state of the thyristor, is not listed in detail, the second part, the cooling water line of the furnace coil, a circuit portion which is in direct contact with water, but also must be insulated with the cabinet, the minimum resistance There must be more than a thousand ohms, which also completely avoids the short circuit to the ground. As for why the phase is not short-circuited, this is to say the principle of the melting furnace . Please see the above explanation. The output of the inverter becomes two water cables. The water cable is connected to both ends of the copper coil. According to the diameter of the copper coil, it has almost no resistance. Why not short circuit? Still the answer, the trigger mechanism, when the inverter receives DC, through the trigger control, diagonal discharge, the DC through the fast diagonal switch switch becomes AC, that is, there will never appear two phases on the copper coil The possibility of simultaneous contact, if it occurs? The answer is to burn through the thyristor, or even affect or damage the control circuit chip. If you understand, why is the water not short-circuited, you don't have to ask again.
