Fault diagnosis of medium frequency furnace reactor

The medium frequency furnace reactor is an important component in the medium frequency power supply system. It is composed of an induction coil, a silicon steel sheet in the middle, and a frame. During operation, the induction coil must be cooled by water to avoid damaging the coil insulation, forming a short circuit between turns, and breaking through the copper tube of the coil to cause a reactor failure. So, what are the faults of the medium frequency furnace reactor? How to judge? The following summarizes some reactor failure problems for your reference.

1. If the coil of the medium frequency furnace reactor is loose, the electromagnetic field will cause the reactor coil to shake when the medium frequency furnace equipment is working. At this time, the reactor coil shakes, causing the reactor inductance to suddenly change, which is easy to cause inverter failure during light load starting and low current operation. In addition, the loose coil of the medium frequency furnace reactor will also produce a lot of noise, affecting the working environment.

2. When users repair the reactor, they adjust the reactor's air gap and coil turns at will, thereby changing the reactor's inductance, affecting the reactor's filtering power, causing the output DC current to be intermittent, resulting in unstable inverter bridge operation, and failure to burn the inverter thyristor. Randomly reducing the reactor's air gap and coil turns will reduce the reactor's ability to block current rise when the inverter bridge is short-circuited, burning the thyristor. Randomly changing the reactor's inductance will also affect the equipment's starting performance.

3. The reactor coil is poorly insulated. Short circuit to ground or short circuit between turns, spark discharge, causing the reactor's inductance to jump suddenly and strong electromagnetic interference, making the equipment unstable and producing frequent abnormal sounds, and overcurrent burning the thyristor.

4. When dealing with scale on the reactor coil, the acid penetrates into the coil, and the acid corrodes the copper tube and generates copper salts to destroy the insulation layer.

5. The coil of the reactor is loose, and the relative movement friction between the coil insulation layer and the coil insulation layer and between the coil insulation layer and the iron core causes the insulation layer to be damaged;

6. The reactor coil is not cooled well and the temperature is too high, resulting in poor insulation of the insulation layer, sparking and carbonization;