Using IGBT module, inverter frequency of 18 KHz, dynamic fast response and easy arc ... starting, arc stability performance, CharacteristicsUsing IGBT module, inverter frequency of 18 KHz, dynamic fast response and easy arc ... , to save electricity by 50%. Welding low carbon steel, high-strength steel and Cr-Mo steel, copper, titanium, etc. ... ×670 IGBT Inverter DC arc welding machine(ZX7 series)