Industrial electric heating furnaces – Arc furnace device – Power supply system
Patent
1999-07-22
2000-12-05
Hoang, Tu Ba
Industrial electric heating furnaces
Arc furnace device
Power supply system
373 48, 373102, H05B 711
Patent
active
061576662
ABSTRACT:
Controlled current feed device for electric arc furnace employed to melt metals, wherein the feed line comprises at least a medium tension bar (13), a feed control device and a transformer (17) serving the furnace, the feed control device (16) being arranged between the medium tension bar (13) and the transformer of the furnace (17) and comprising a mutual inductor (19) consisting of a primary coil (19a) and a secondary (19b) coil, the primary coil (19a) being arranged in serial connection on the feed line (10) and the secondary coil (19b) being connected to at least a re-phasing filter (20) comprising at least a condenser (22).
REFERENCES:
patent: 3567837 (1971-03-01), Van Nostran
patent: 3952138 (1976-04-01), Nanjyo et al.
patent: 5239554 (1993-08-01), Gensini et al.
L.C. Elliott: "Electric Power Systems for Large Arc Furnaces" Westinghouse Engineer, vol. 29, Dec. 1969, pp. 143-149.
Yngve Sundberg "The Arc Furnace As A Load On The Network" ASEA Journal vol. 49, 1976 pp. 75-87.
Richard F. Dudley: "Special Design Considerations For Filter Banks in Arc Furnace Installations" IEEE Transactions On Industry vol. 33, No. 1, Jan. 1997.
Della Vedova Ferruccio
Fragiacomo Riccardo
Gensini Gianni
Centro Automation SpA
Hoang Tu Ba
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