Patent · US Expired

Induction devices with distributed air gaps

US6885273B2 · kind B2 · utility

5Cited by

324References

7Claims

0Family size

Assignee

ABB AB · SE

Inventors

Pan Min · Uppsala, SE
Li Ming · Visby, SE
Rongsheng Liu · Hagfors, SE
Mikael Dahlgren · Hagfors, SE
Par Holmberg · Västerås, SE
Gunnar Russberg · Västerås, SE
Christian Sasse · Hagfors, SE
Svante Soderholm · Västerås, SE

Key dates

Filing date	Feb 14, 2002
Grant date	Apr 26, 2005
Priority date	—
Expiry date	Mar 28, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH01F3/14
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A distributed air gap material for a induction device in power systems for minimizing fringe losses, mechanical losses and noise in the core The distributed air gap material occupies a selected portion of the core and is formed of a finely divided magnetic material in a matrix of a dielectric material particles. The air gap material has a zone of transition in which the permeability values vary within the air gap material.

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