1. Intermediate frequency power supply Always remove dust from the power cabinet, especially the outside of the thyristor, and wipe it off with alcohol. The inverter equipment in operation usually has a dedicated machine room, but the actual working environment is not ideal. In the smelting and forging process, the dust is strongly vibrated; in the diathermy hardening process, the device is often close to pickling, phosphating and other working equipment, and there are many corrosive gases, which will destroy the components of the device and reduce the device. Dielectric strength. When there is a lot of dust, the surface discharge phenomenon of the components often occurs, so it is necessary to pay attention to the frequent cleaning work to prevent malfunctions.

2. Always check whether the water pipe joints are firmly tied, and clean the scale of the inner wall of the cooling water pipe. When using tap water and well water as the cooling water source of the device, it is easier to accumulate scale and affect the cooling effect. When the plastic water pipe is aged and cracked, it should be replaced in time. When the device is operated in the summer, tap water and well water cooling are often prone to condensation. The circulating water system should be considered and should be stopped when condensation is severe.

3. Regularly overhaul the device, check and tighten the bolts, nuts and crimps of each part of the device. Contactors and relay contacts are loose or have poor contact. They should be repaired and replaced in time. Do not use them to prevent accidents. Periodically verify the device's overcurrent, overvoltage and other protection systems to prevent protection failure.

4. Always check whether the wiring of the load is good, whether the insulation is reliable, and the oxide scale accumulated in the heat-transducing coil should be cleaned in time; when the insulation furnace is lined with cracks, it should be replaced in time; after replacing the new furnace lining, the melting furnace should pay attention to check the insulation. . The load of the frequency conversion device is set at the work site, and the fault is relatively high, which is often neglected. Therefore, strengthening the maintenance of the load and preventing the fault wave and the variable frequency power supply are important links to ensure the normal operation of the device.