Measurement of and Study on Conducted EMI of Arc Welding Inverter

The conducted emission generated by arc welding power source not only may affect devices connect- ed in the same main supply,but also may result in mal-function of itself.In this paper,many types of arc welding power sources were tested for conducted emission.The mechanism of conducted emission is analyzed and the suppression method is developed.The re-design of arc welding power source can meet the conducted emission requirement of IEC 60974-10 and has been verified by experiments.