Apparatus for transforming multiphase power of different phase t

Details Apparatus for transforming multiphase power of different phase t Apparatus for transforming multiphase power of different phase t

1985-03-06

1986-09-09

Kozma, Thomas J.

Inductor devices

Polyphase

Adjustable inductor

336147, H01F 3300

Patent

active

046111905

ABSTRACT:
Three-phase power susceptible of having different line to line input voltages in the wye and delta configurations is converted into a three-phase wye output, each phase of which has the same line to line voltage for all of the predetermined input voltages. A three-phase transformer has a secondary winding connected in a wye configuration. No switches are connected to the secondary winding. A primary winding of the transformer includes, for each phase, first and second coils, each having a single tap between a pair of end terminals. The terminals and taps are selectively connected in series with each other. The end terminals are selectively connected in parallel with each other. In certain of the situations all of first end terminals of first coils for each phase are connected to the line voltages. In others of the situations, predetermined first end terminals and taps of predetermined coils are connected to the line voltages and the first terminals and taps of other coils are connected to a neutral terminal.

REFERENCES:
patent: 1373910 (1921-04-01), Pressey
patent: 1576280 (1926-03-01), Horelick
patent: 1596522 (1926-08-01), Fischer
patent: 1896398 (1926-02-01), Gay
patent: 2020941 (1935-11-01), Guhl
patent: 3706060 (1972-12-01), Goodman
patent: 3939362 (1976-02-01), Grimes et al.

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