Inverter welding set powered by three-phase mains

The electric welding set with a power of 10 kW powered by 380-V three-phase mains is described. It is shown that the total active current in a two-set inverter transformer is 1.5 times lower than in the single-set inverter of the same capacity with built-in shunted transistors. The external and amplitude performances are investigated and it is revealed that the available nonlinear segment does not prevent the use of the designed device for welding in air, CO2, or argon environments.