Electronic welder with high-frequency resonant inverter

Author

Malesani, Luigi ; Mattavelli, Paolo ; Rossetto, Leopoldo ; Tenti, Paolo ; Marin, Walter ; Pollmann, Alberto

Author_Institution

Dept. of Electr. Eng., Padova Univ., Italy

Volume

31

Issue

2

fYear

1995

Firstpage

273

Lastpage

279

Abstract

This paper presents a new generation of electronic welders, incorporating soft-switched inverters driving high-frequency transformers. They are light, reliable, flexible, and offer good efficiency, fast response, and control robustness. A control strategy able to ensure correct operation in any load and supply condition, small stand-by loss, and automatic recovery from line failures is discussed. Experimental results of an industrial prototype rated for 80 V (no-load voltage), 130 A (full-load current), and 80-kHz switching frequency are also presented

Keywords

DC-AC power convertors; electric welding; high-frequency transformers; invertors; power transformers; process control; resonant power convertors; switching circuits; voltage control; 130 A; 80 V; 80 kHz; control robustness; control strategy; efficiency; electronic welders; high-frequency resonant inverter; high-frequency transformers; line failures; load; response; soft-switching; supply; switching frequency; Automatic control; Electrical equipment industry; Lighting control; Prototypes; Resonant inverters; Robust control; Switching frequency; Transformers; Voltage; Welding;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/28.370273

Filename

370273