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本文对方波交流ＴＩＧ焊电源主电路进行了详细地分析与设计，并进行了波形测试，从而验证该电路的正确性。
In this paper, the main circuit of square wave AC TIG welding power source is analyzed and designed in detail, and the waveform test is conducted to verify the correctness of the circuit.