... response and easy arc starting, arc stability performance, CharacteristicsUsing IGBT module, inverter frequency of 18 KHz, dynamic fast response and easy arc ... , as compared with conventional welding machine, to save electricity by 50%. Welding low carbon steel, high-strength steel and Cr-Mo steel ... ×250×450650×320×670650×320×670650×320×670650×320×670 IGBT Inverter DC arc welding machine(ZX7 series)