Patent · US Expired

Gas-insulated high-voltage semiconductor valve means

US6151201A · kind A · utility

1Cited by

5References

17Claims

0Family size

Assignee

ABB AB · SE

Inventors

Gunnar Asplund · Solna, SE
Olle Ekwall · Ludvika, SE
Olaf Saksvik · Ludvika, SE

Key dates

Filing date	Oct 27, 1998
Grant date	Nov 21, 2000
Priority date	—
Expiry date	Oct 27, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH01L2924/3011
WIPO fieldSemiconductors
WIPO sectorElectrical engineering

Abstract

A gas-insulated semiconductor valve for high voltage power has an elongated valve stack with a plurality of semiconductor elements. The valve stack is provided with electrostatic shields for reducing the stresses on the insulating medium. The shields comprise a plurality of annular shields distributed along the longitudinal axis of the valve stack. The shields are arranged in planes which are substantially perpendicular to the longitudinal axis of the stack and surround the valve stack. The curved part of each shield has a substantially constant radius of curvature.

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