Patent · US Expired

Transformer with voltage regulating means

US6995646B1 · kind B1 · utility

38Cited by

337References

8Claims

0Family size

Assignee

ABB AB · SE

Inventors

Udo Fromm · Visby, SE
Par Holmberg · Västerås, SE
Albert Jaksts · Västerås, SE
Mats Leijon · Västerås, SE
Christian Sasse · Hagfors, SE
Thorsten Schütte · Visby, SE

Key dates

Filing date	Feb 2, 1998
Grant date	Feb 7, 2006
Priority date	—
Expiry date	Feb 2, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH02K2203/15
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A power or regulating transformer with voltage regulator includes regulating windings made of a flexible conductor having an electric field containing mechanism that forces the electric field due to the current in the winding to be contained within the flexible conductor. Since virtually no electric field is to be found outside the flexible conductor of the regulating winding, the regulating winding may be formed without having to consider the electric field distribution, thus providing for a transformer with a favorable regulating winding design.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.