同时在焊接过程中，实现恒流、恒百分比控制、网压补偿等多种算法。
In the welding course can realize constant current supply and permanent percentage and controls and line voltage compensation etc.
第三章重点讲的是恒流ups在市电出现故障时如何实现恒流不间断供电的。
Chapter Three explains how the UPS with constant current supply the power, as the electric power is not available.
采用PI算法，实现电源恒流外特性控制。
The constant current generator characteristic of source is realized by proportional integral (PI) algorithm.
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