... 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 starting, arc stability performance, and pool uniform, minimum spatter, even small ... ×320×670650×320×670650×320×670650×320×670 IGBT Inverter DC arc welding machine(ZX7 series)