Metallic wire

Details Metallic wire Metallic wire

2002-06-03

2004-11-09

Nguyen, Tuyen T. (Department: 2832)

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

C174S1170FF, C174S1170FF, C174S12900B

Reexamination Certificate

active

06815618

ABSTRACT:

BACKGROUND OF THE INVENTION
The invention relates to a metallic wire and to a winding for transformers.
In windings for oil-cooled transformers, paper-insulated wires or transposed conductors having a constant thickness/width ratio over their entire length are used. The wires are wound onto a magnetizable metal core.
Such an arrangement of the metal wires does not take into account the different field strengths in the center and at the ends.
As a consequence, the losses in the transformer are increased and the efficiency is reduced.
SUMMARY OF THE INVENTION
An object of the present invention is thus to provide a metal wire for transformer windings that obviates the described drawbacks, or to provide a winding that makes it possible to reduce the stray-field losses in a transformer and to improve the transformer's efficiency.


REFERENCES:
patent: 1132673 (1915-03-01), Murray
patent: 2462884 (1949-03-01), Miller, Jr.
patent: 3659038 (1972-04-01), Shealy
patent: 4529837 (1985-07-01), Borden
patent: 5171942 (1992-12-01), Powers
patent: 04-024909 (1992-01-01), None

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