A Study On Power Factor Correction of SMAW(shielded metal-arc welding) Using Single Phase AC/DC Boost Converter

단상 AC/DC 승압형 컨버터를 이용한 피복 아크 용접기 역률 개선에 관한 연구

In this paper, we proposed AC/DC boost converter to improve input current harmonic reduction in SMAW(shielded metal-arc welding). The proposed harmonic reduction with the boost converter design and the UC2854 integrated circuit which controls the converter, The topology of welding power supply is made of a pair of boost converter and welder half-bridge IGBT inverter. The voltage arc is modeled by a variable resistance in series with a voltage source. The results has been confirmed by PSIM simulation tool. The simulation results show that input at current is nearly sinusoidal with low harmonic contents and sinusoidal input current waveform at high power factor.