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利用自动控制理论中的频率法对晶闸管整流弧焊电源进行系统设计。实践证明该方法简单、明确，且系统参数与性能指标间有对应关联，是一种实用的系统设计法。
The system of thyristor arc welding power source is designed by frequency method in automatic control theory. Practice has proved that the method is simple and clear, and the system parameters and performance indicators have a corresponding relationship between, is a practical system design.