Welding

Inverter welding machine ‌ is a kind of arc welding power supply using inverter technology, also known as arc welding inverter. The working principle is that the three-phase power-frequency alternating current is rectified and filtered into direct current, and then through the alternating switch of high-power switching electronic components (such as IGBT), the inverter is converted into medium-frequency alternating current, and then rectified and filtered after transformer step-down, the final output stable DC welding current ‌.Welding machine IGBT control mode is mainly two, one is a hard switch, the other is a soft switch. The biggest difference between the two is that soft switching theory IGBT does not have switching loss, only on-off loss. The topology of IGBT used in the welding machine is different and divided into full bridge welding machine and half bridge welding machine, and the half bridge welding machine is a hard switch welding machine. The application of Yinmao module in the welding machine is as follows (the following recommended default switching frequency 20KHz, three-phase 380V power supply).