Browse Prior Art Database

Solid Grain Oriented Flat Magnetic Core

IP.com Disclosure Number: IPCOM000073847D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Pesch, JA: AUTHOR [+2]

Abstract

Materials such as 3.25% Si-Fe have optimum magnetic properties parallel to the direction of rolling and poorer properties in other directions. In commonly used transformer laminations such as "E" and "L" shaped stampings, magnetic flux must pass in the most difficult directions at the corners of the configuration.

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Solid Grain Oriented Flat Magnetic Core

Materials such as 3.25% Si-Fe have optimum magnetic properties parallel to the direction of rolling and poorer properties in other directions. In commonly used transformer laminations such as "E" and "L" shaped stampings, magnetic flux must pass in the most difficult directions at the corners of the configuration.

As shown at A, a strip of material 2, which has been rolled in the direction of the arrow 3, has trapezoidal shaped laminations 4 blanked therefrom. Such laminations of 3.25% Si-Fe are electron beam welded in the configuration shown at B and heat treated at 2050 degrees F in a nonoxidizing atmosphere. This permits grain growth of the preferred crystallographic orientation to occur in the weld area.

The resulting lamination 5 has the magnetic flux paths all aligned in the direction of rolling (arrows 3).

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