Patent · US Expired

Power transformer/inductor

US7046492B2 · kind B2 · utility

20Cited by

338References

9Claims

0Family size

Assignee

ABB AB · SE

Inventors

Udo Fromm · Visby, SE
Sven Hornfeldt · Åkersberga, SE
Par Holmberg · Västerås, SE
Gunnar Kylander · Västerås, SE
Li Ming · Visby, SE
Mats Leijon · Västerås, SE

Key dates

Filing date	Dec 20, 2004
Grant date	May 16, 2006
Priority date	—
Expiry date	Dec 20, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S174/13
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A power transformer/inductor includes at least one winding. The winding is made of a high voltage cable that includes an electric conductor, and around the electric conductor is arranged a first semiconducting layer, around the first semiconducting layer is an insulating layer, and around the insulating layer is a second semiconducting layer. The second semiconducting layer is directly earthed at both ends of the winding and furthermore at least at two points per turn of every winding such that one or more points are indirectly earthed.

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