PARAMETRIC CURRENT SUPPLY Russian patent published in 2000 - IPC

FIELD: electrical engineering; commercial-frequency ac-to-regulated-dc power conversion. SUBSTANCE: parametric current supply primarily designed for feeding electrolyzers in nonferrous metallurgy and titanium-smelting vacuum arc furnaces has at least one three-phase reactor, three-phase bank of capacitors, converter incorporating n pairs of converter sections, and converter transformer incorporating n equalizing reactors and n pairs of valve winding sections; one section of each pair is directly star-connected and joined to odd-numbered leads a₁,b₃,c₅, and other section is connected in inverted star and joined to even- numbered leads a₄,b₆,c₂,; neutral leads of each pair are connected to respective equalizing reactors; each phase lead of section connected into inverted star is placed near that of section connected to inverted star and leads of each section are arranged in opposition to buses connected to respective odd- and even- numbered converter sections; novelty is that leads of phases a and c of one star connection are proposed to be connected to buses arranged in opposition to those of phases c and a, where n is integer number greater than or equal to unity. Such connection provides for more uniform current distribution between respective pairs of converter sections and between circuits of equalizing reactors. EFFECT: improved operating reliability. 2 dwg, 1 tbl