Title :
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
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;
Journal_Title :
Industry Applications, IEEE Transactions on
