AUTO TRANSFORMER FOR USE WITH MULTIPLE PULSE RECTIFIERS

摘要

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.