Transformer with voltage balancing tertiary winding

Details Transformer with voltage balancing tertiary winding Transformer with voltage balancing tertiary winding

1989-12-27

1991-10-15

Kozma, Thomas J.

Inductor devices

Polyphase

Interconnected windings

363 43, H01F 3300

Patent

active

050578081

ABSTRACT:
A summing transformer includes first and second sets of primary windings, first and second sets of secondary windings inductively linked with the first and second sets of primary windings and a set of tertiary windings inductively linked with one of the first and second sets of secondary windings wherein the tertiary windigs are connected together and permit zero sequence currents to flow during a period of unbalanced load currents in the sets of secondary windings whereby the output voltages produced thereby are maintained in a substantially balanced condition during such period.

REFERENCES:
patent: 963132 (1910-07-01), Frank
patent: 1173094 (1916-02-01), Blume
patent: 1812949 (1931-07-01), Halperin et al.
patent: 2779926 (1957-01-01), Johnson et al.
patent: 3246267 (1966-04-01), Wesolowski et al.
patent: 3611224 (1971-10-01), Becker
patent: 3775662 (1973-11-01), Compoly et al.

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