New DC rail side diode-clamping AERC-assisted soft- switching PWM DC-DC converter with high-frequency link for high performance arc welding

Three-level phase shift ZVS-PWM DC-DC converter with neutral point clamping diodes and flying capacitor for gas metal arc welding

“…of Electrical Eng., Walailak University, Thailand (3) Welding & Mechatronics Company, Daihen Corporation, Kobe, Japan (3) Yamaguchi University, Yamaguchi, Japan INTRODUCTION In, recent years, the authors have demonstrated the halfbridge and full-bridge prototype of the high frequency transformer-linked soft-switching PWM DC-DC converters with simple active edge resonant cells (AERCs) in the input buslines of high side and low side rails for gas metal arc welding. These DC-DC converter topologies could basically achieve their high efficiency, high performance and high power density [1]- [4]. These prototypes of soft-switching symmetrical PWM DC-DC high power converter using the latest IGBT power modules has been partially put into practical use for low voltage large current application in industry.…”