Patent · US Expired

High voltage AC machine winding with grounded neutral circuit

US6891303B2 · kind B2 · utility

12Cited by

327References

41Claims

0Family size

Assignee

ABB AB · SE

Inventors

Mats Leijon · Västerås, SE
Bertil Berggren · Västerås, SE
Lars Gertmar · Visby, SE
Jan Nygren · Västerås, SE
Erland Sörensen · Hagfors, SE

Key dates

Filing date	May 27, 1997
Grant date	May 10, 2005
Priority date	—
Expiry date	Jul 8, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S174/28
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electric high voltage AC machine intended to be directly connected to a distribution or transmission network (16) comprises at least one winding. This winding comprises at least one current-carrying conductor, a first layer having semiconducting properties provided around said conductor, a solid insulating layer provided around said first layer, and a second layer having semiconducting properties provided around said insulating layer. In addition grounding means (18, 24, 26, 28) are provided to connect at least one point of said winding to ground.

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