How is the circuit of the medium frequency spot welding machine constructed?

The intermediate frequency spot welding machine includes a controller and an intermediate frequency transformer. The output terminals of the three-phase bridge rectifier and LC filter circuits are connected to the input terminals of the full-bridge inverter circuit composed of IGBTs.

The AC square wave output by the full-bridge inverter circuit passes through the intermediate frequency transformer and is rectified by the full-wave rectifier circuit connected to the secondary of the intermediate frequency transformer to obtain pulsating DC output for the load. The IGBT1-full-bridge inverter circuit includes its controller and The drive circuit, under the control of its controller and drive circuit, the IGBT1-4 full-bridge inverter circuit is alternately turned on and off, and the peak current control method is used to complete the inversion process, which can better solve the problem of limited capacity of traditional spot welding machines.

The welding current can be dynamically adjusted to be close to full DC, the nugget size expands steadily, there is almost no spatter, the welding quality is stable, and the thermal efficiency is high. It overcomes the shortcomings of other welding machines that cannot meet the process requirements of special welding materials and is suitable for high-power load sites. And compared with power frequency welding machines, the welding current can be reduced by 40%, and the service life of the electrode is greatly extended.

Suzhou Agera Automation Equipment Co., Ltd. is an enterprise engaged in the development of automated assembly, welding, testing equipment and production lines. It is mainly used in home appliance hardware, automobile manufacturing, sheet metal, 3C electronics industries, etc. According to customer needs, we can develop and customize various welding machines, automated welding equipment, assembly and welding production lines, assembly lines, etc., to provide appropriate automated overall solutions for enterprise transformation and upgrading, and help enterprises quickly realize the transformation from traditional production methods to mid-to-high-end production methods. Transformation and upgrading services. If you are interested in our automation equipment and production lines, please contact us:  leo@agerawelder.com