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

2006-05-23

2006-05-23

Mai, Anh (Department: 2832)

Inductor devices

Polyphase

C307S013000, C307S017000, C363S126000

Reexamination Certificate

active

07049921

ABSTRACT:
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.

REFERENCES:
patent: 4013942 (1977-03-01), Boshnyaga et al.
patent: 5079499 (1992-01-01), Owen
patent: 5130628 (1992-07-01), Owen
patent: 6198647 (2001-03-01), Zhou et al.
patent: 6861936 (2005-03-01), Kamath

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