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本文通过实际电路重点介绍了ＭＭＡＷ／ＴＩＧ（ＭａｎｕａｌＭｅｔａｌＡｒｃＷｅｌｄｉｎｇ／ＴｕｎｇｓｔｅｎＩｎｅｒｔＧａｓ（ｗｅｌｄｉｎｇ））焊逆变电源恒流阶梯外拖式外特性和恒流内拐式外特性、ＩＧＢＴ（ＩｎｓｕｌａｔｅｄＧａｔｅＢｉｐｏｌａｒＴｒａｎｓｉｓｔｏｒ）高压功率开关管的过流及过压保护，并对半桥式功率转换电路的抗不平衡能力进行了详细分析。
In this paper, the MMAW / TIG (ManualMetalArcWelding / TungstenInertGas (welding)) welding inverter with constant current step-drop external characteristics and constant-current internal-external characteristics are mainly introduced through the actual circuit. The overcurrent of IGBT (Insulated Gate Bipolar Transistor) And overvoltage protection, and a detailed analysis of the anti-imbalance ability of the half-bridge power conversion circuit.