随着电流的减小，变流电路在换相组的直流电流刚出现间断时的平均直流电流
在连续大电流区间获得稳定的熔滴过渡形式才是采用无氦混合气体保护实现高熔敷率MAG焊工艺的核心问题。
It is the key to realizing high deposition rates MAG process with non-helium in shielding-gas mixture to acquire stable metal transfer mode in the region of high continuous current.
数字化脉冲MIG焊以其可以在很大电流范围内获得射滴过渡、轴向性好、飞溅小、适合全位置焊等众多优点，在焊接领域中占有重要一席。
Digitized PMIG welding is playing an important role in welding field for its advantages, such as good direction transition, less splashed material, nice figure and wide welding current extent.
该保护方案的灵敏度不受过渡电阻、雷击、故障类型、负荷电流、系统运行方式等因素的影响。
The sensitivity of the proposed protection scheme is not impacted by the factors such as transition resistance, lightning stroke, fault type, load current and operating mode of power system.
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