In this study, a high-performance single-phase inverter arc welding machine is presented. Power control of the developed welding machine is realized with a high-frequency, phase-shifted full bridge (PSFB) pulse-width modulation (PWM) converter. The PSFB PWM converter operates with soft switching at no load and full load. There is no need to use a passive snubber in the converter. Welding machine control is implemented with a digital signal processor (DSP) and phase-shift PWM IC. By means of the DSP, advanced arc welding functions and protection features such as short-circuit, over-current, and temperature protection are achieved. The current and voltage waveforms given are from an IGBT-based PSFB PWM arc welding machine operating at 75 kHz switching frequency and 160 A output current. The experimental results show that the proposed system has promising feasibility in industrial applications.
Arc welding machine, PSFB PWM converter, DC-DC converter, soft switching, zero-voltage transition, zero-voltage switching, IGBT
"A new PSFB converter-based inverter arc welding machine with high power density and high efficiency,"
Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 22:
6, Article 9.
Available at: https://journals.tubitak.gov.tr/elektrik/vol22/iss6/9