Patent · US Expired

Power transformer/inductor

US6970063B1 · kind B1 · utility

5Cited by

334References

13Claims

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	Feb 2, 1998
Grant date	Nov 29, 2005
Priority date	—
Expiry date	Feb 2, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH01F27/2828
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present invention relates to a power transformer/inductor comprising at least one winding. The windings are designed by means of a high-voltage cable, comprising an electric conductor, and around the conductor there is arranged a first semiconducting layer, around the first semiconducting layer there is arranged an insulating layer and around the insulating layer there is arranged a second semiconducting layer. The second semiconducting layer is earthed at or in the vicinity of both ends (261, 262; 281, 282) of each winding and furthermore one point between both ends (261, 262; 281, 282) is directly earthed.

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