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Electronic welder with high-frequency resonant inverter

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6 Author(s)
Malesani, L. ; Dept. of Electr. Eng., Padova Univ., Italy ; Mattavelli, P. ; Rossetto, L. ; Tenti, P.
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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

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Industry Applications, IEEE Transactions on  (Volume:31 ,  Issue: 2 )