Gapped amorphous metal-based magnetic core

Abstract

A magnetic implement has a gap size ranging from about 1 to about 20 mm. The implement comprises a magnetic core composed of an amorphous Fe-based alloy. A physical gap is disposed in the core's magnetic path. The alloy has an amorphous structure and is based on the components: (Fe-Ni-Co)-(B-Si-C). The sum of its Fe+Ni+Co content is in the range of 65-85 atom percent. Advantageously, the core exhibits an overall magnetic permeability ranging from about 40 to about 200 and enhanced magnetic performance.

Description

[0001] This application is a divisional application of a patent application with the application number 200380110225.2 and the application date of December 10, 2003 and the same title. technical field [0002] The present invention relates to magnetic cores; more particularly, to a ferromagnetic amorphous metal alloy magnetic core, the magnetic circuit of which is gapped, and which is particularly suitable for use in electric choke coils and current sensors. technical background [0003] Electric chokes and current sensors with magnetic cores should have low magnetic permeability to control or sense large currents. Typically, a core with low permeability will not saturate until it is exposed to a strong magnetic field. The upper limit of this magnetic field depends on the saturation induction or flux density, commonly referred to as the B of the core material S . due to B S The value depends on the chemistry of the core material, so the choice of core material depends on ...

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Problems solved by technology

There is also a need for a more complete understanding of the gap size that affects the magnetic losses and thus the overall magnetic performance of the magnetic device

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