Patent · US Expired

Method for winding a soft-magnetic ribbon to form a self-contained magnetic core

US4980965A · kind A · utility

0Cited by

3References

4Claims

0Family size

Assignee

Vacuumschmelze GmbH & Co. KG · DE

Inventors

Reiner Dinter · Bruchköbel, DE
Ewald Hientzsch · Rodenbach, DE
Karl-Friedrich Daus · Bruchköbel, DE

Key dates

Filing date	Jan 26, 1990
Grant date	Jan 1, 1991
Priority date	—
Expiry date	Jan 26, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49078
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for winding a soft-magnetic ribbon to form a self-contained magnetic core using a winding arbor includes the step of, after the ribbon has been wound on the arbor, holding the free end of the ribbon to the preceding turn by spot welds, disposed in general alignment along a center of the ribbon. The free end of the ribbon may be tapered, so that projecting corners are avoided. By making the spot welds substantially in the center of the ribbon, the formation of eddy currents, which may occur if the spot weld accidentally connected two adjacent turns of the ribbon, are avoided. A similar method may be used to releasably attach the beginning of the ribbon to the arbor, with the spot welds then being broken when the core is removed from the arbor. The method is particularly suited for winding a ribbon consisting of amorphous soft-magnetic material.

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