The mid-frequency welding transformer is made by combining ferrite high permeability silicon steel sheets and then casting with epoxy resin, which significantly reduces the transformer's losses. Current measurement is conducted in the secondary circuit using sensors. The primary assembly of the transformer features a temperature-sensing switch, while the secondary assembly includes a rectifier set. All coils and rectifier elements are equipped with water-cooled heat dissipation. This greatly reduces the weight of the core material.

Medium-frequency inverters are a crucial power drive component of the equipment. They convert three-phase 50/60Hz 380V AC input into a high-voltage DC power supply, which is connected to capacitors for filtering. Subsequently, the medium-frequency inverter outputs an appropriate 1KHz square wave based on the control input settings and feedback current. This is then used to power the low-voltage welding process through a medium-frequency welding transformer. The inverter box is equipped with an exhaust fan for air cooling of the inverter, ensuring safe operation.

Compared to traditional welding power sources, the following advantages are present:

Our supply offers greater adaptability to voltage fluctuations and drops in the power grid. A portion is stored by the inverter and then supplied to the load, replacing the direct power supply from the grid to the load. It saves energy, improves power factor, and reduces processing costs. It can reduce interference in a secondary circuit with a very large open area. The welding current is DC, and it will not affect the welding when there is induced (magnetic) material in the secondary winding. It provides more accurate, quick, and precise parameter analysis. It can prevent damage caused by the wave interference in the power grid induced by the thyristor system.