Quality square wave power supply, current zero crossing time is short, arc stability, arc without high frequency stability.
优质方波电源，电流过零时间短，电弧稳定，无需高频稳弧。
The reason is that soonest at the next current zero-crossing the firing pulse of thyristors can be reset.
通常的短路故障电流会大大高于这个倍数，而软启动器的晶闸管本身是没有短路分断能力的。
The stability of the welding arc depends mainly on the voltage and the gas ionization when current zero-crossing as well as the electron emission ability of the electrode.
其电弧稳定与否，主要取决于电流过零瞬间的电弧空间电离度、 电极发射电子能力及再引燃电压的上升速度。
This thesis analyzes the zero-crossing distortion, and points out that the major causes are the inductor and the phase displacement between the input current and the input voltage.
本文对产生输入电流过零畸变的各种原因进行了定量分析，指出电感和输入电流与输入电压间的相位差是影响高频输入下输入电流过零畸变严重的根本原因。
This thesis illustrates the theory in how interleaving technology solves the problem of input current zero-crossing distortion.
本文对交错技术解决输入电流过零畸变的原理进行了说明。
Due to DC arc extinguishing current has no natural zero-crossing point, so, DC arc can only been extinguished by forced zero-crossing-over.
由于直流熄弧电流不存在自然的过零点，因此必须强制过零才能熄灭直流电弧。
Due to DC arc extinguishing current has no natural zero-crossing point, so, DC arc can only been extinguished by forced zero-crossing-over.
由于直流熄弧电流不存在自然的过零点，因此必须强制过零才能熄灭直流电弧。
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