IGBT逆变弧焊电源CO2气体保护焊飞溅的波形控制

摘要

With the development of inverter welding power and the application of digital technology, inverter CO2 gas shielded arc welding power supply can adjust the welding power source output current and voltage to control the droplet transfer, improve weld forming, reduce the spatter. According to the different stage requirements of droplet transfer, the welding current and voltage control signal were produced. By waveform control realizes regulate short -circuit current rising velocity, reduce the short circuit - current peak, reduce the short - circuit explosion energy, reduce the number of instantaneous short -circuit, through the liquid bridge necking voltage rising rate in the short - circuit late to cut short - circuit current, eliminate electrical explosion energy. These can reduce effectively the splashing quantity of CO2 gas shielded arc welding short - circuit transfer, provide powerful guarantee for design and implementation of low spatter CO2 gas shielded arc welding.%随着逆变焊机的发展和数字技术的应用,逆变CO2气体保护焊电源可通过调节焊接电源输出的电流与电压来控制熔滴过渡,改善焊缝成形,降低飞溅.根据熔滴过渡不同阶段的要求产生电流与电压控制信号,进行波形控制可实现调节短路电流上升速度,以减小短路峰值电流,降低短路爆炸能量；减少瞬时短路的次数；通过短路后期液桥颈缩电压上升率切断短路电流,消除电爆炸能量.以此有效减少CO2气体保护焊短路过渡产生的飞溅量,为低飞溅CO2气体保护焊的设计与实现提供有力保证.