... 18 KHz, dynamic fast response and easy arc starting, arc stability performance, CharacteristicsUsing IGBT module, inverter frequency ... 18 KHz, dynamic fast response and easy arc starting, arc stability performance, and pool uniform, minimum spatter ... than 100 W, as compared with conventional welding machine, to save electricity by 50%. Welding low ... ×670 IGBT Inverter DC arc welding machine(ZX7 series)