Patent · US Expired

Core for a controllable inductor and a method for producing therof

US6232865A · kind A · utility

10Cited by

6References

9Claims

0Family size

Assignee

Asea Brown Boveri, S.A. · CH

Inventors

Gunnar Zinders · Smedjebacken, SE
Tommy Holmgren · Ludvika, SE
Bjorn Sandin · Ludvika, SE
Stefan Valdemarsson · Säter, SE
Dan Elofsson · Ludvika, SE
Olle Ekwall · Ludvika, SE

Key dates

Filing date	Jul 18, 1997
Grant date	May 15, 2001
Priority date	—
Expiry date	Jul 18, 2017

Classification

Technology area (CPC H)Electricity
CPC primaryH01F2029/143
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A tubular core (6) for a controllable inductor with a main winding (1) surrounding the core and a control winding (7) passing substantially axially through the core. The core (6) is capable of receiving a magnetic flux from the main winding (1) running substantially axially therethrough and having a plurality of core rings (8) stacked co-axially on top of each other and connected to a rigid unit. The core rings (8) are connected to each other forming a walled construction. The core (6) also has an inner envelope (18) with an outer cross-section that is substantially equal to the inner cross-section of the core ring walled construction. The walled construction has joints (16) between the core rings (8) in an axial direction which are overlapped by a part of the envelope (18).

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