Design and parameters election for soft-switch arc welding power source(Ⅰ)

Resonant LCL-type soft-switching arc welding power source is designed based on the principle of main circuit, and main parameter of the circuit is defined. The contents include output current I₀ and no load votage of the power source, parameter selection for series resonant inductance L_S and capacitance C_S, buffer capacitance for IGBT. The experimental results show that the power source can work well with soft-switched and the design is reasonable and valid.