Phase shifting transformer or autotransformer

Details Phase shifting transformer or autotransformer Phase shifting transformer or autotransformer

1995-03-03

1996-08-06

Picard, Leo P.

Inductor devices

Polyphase

Adjustable inductor

336 12, 172238, H01F 3300

Patent

active

055437710

ABSTRACT:
A phase shifting polygonal transformer or autotransformer for a three phase electrical distribution system is provided, in which the transformer output winding or autotransformer winding is composed solely of three main coils and three auxiliary coils, alternately interconnected in series. The outputs for the transformer/autotransformer are connected to taps in the coils offset from the connections between coils, which eliminates the need for multiple auxiliary coils in each phase. The transformer/autotransformer of the invention is thus much simpler and less expensive to manufacture than a conventional phase shifting transformer or autotransformer, but reduces harmonics just as effectively.

REFERENCES:
patent: 1935419 (1933-11-01), Palley
patent: 2212543 (1940-08-01), Jovy
patent: 4611190 (1986-09-01), Montague
patent: 5003277 (1991-03-01), Sokai et al.
patent: 5416458 (1995-05-01), Menke et al.

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