Auto transformer for use with multiple pulse rectifiers

Details Auto transformer for use with multiple pulse rectifiers Auto transformer for use with multiple pulse rectifiers

H - Electricity

01

F

H01F 30/12 (2006.01)

Patent

CA 2576990

Zig-zag connected, phase shifting, auto-transformers that provides the inherent ability to block the flow of zero sequence currents that are associated with multiple-pulse rectifiers. The transformer coils are wound in three separate, multi-wound windings on three single-phase cores. A vector oriented winding scheme is provided with three output windings and three internal zig-zag configured pairs of windings. The three internal zig-zag windings are connected at corresponding ends of a first winding to form an electrical neutral. The second windings of the three internal zig-zag windings respectively tap one of the output windings. The external power source connects to a point along each of the second windings of the pair of internal windings.

L'invention concerne des autotransformateurs reliés en zig-zag et à déphasage qui ont la capacité inhérente de bloquer le flux de courants homopolaires associés à des redresseurs à impulsions multiples. Les bobines de transformateurs sont enroulées en trois bobinages séparés à enroulements multiples sur trois noyaux monophasés. Un mécanisme d'enroulement orienté vecteur est doté de trois bobinages de sortie et de trois paires de bobinages internes en zig-zag. Les trois bobinages internes en zig-zag sont connectés à des extrémités correspondantes d'un premier bobinage afin de former un neutre électrique. Les deuxièmes bobinages des trois bobinages internes en zig-zag filètent respectivement un des bobinages de sortie. La source de puissance externe se connecte à un point le long de chacun des seconds bobinages de la paire de bobinages internes.

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