Patent ID: 6597271
Filing Date: 2003-07-22
Classification: H01F

Abstract:
An improved core apparatus for a magnetic device; the core apparatus having a first terminus and a second terminus; said first terminus and said second terminus cooperating to establish a gap across an expanse between said first terminus and said second terminus; said gap having a gap distance; said magnetic device including an inductive winding structure; said inductive winding structure cooperating with the core apparatus to establish a magnetic circuit having inductance; said inductance being variable with current applied to said inductive winding structure; said magnetic device having an optimum inductance-current locus for each said gap distance; respective said optimum inductance-current loci for selected said gap distances being expressible by an inductance-current curve; the improvement comprising: at least one terminus of said first terminus and said second terminus being configured to effect variance of effective said gap distance across said expanse; said variance effecting selective local saturation of successive portions of said at least one terminus; said selective local saturation establishing successive new effective gap distances; said successive new said effective gap distances establishing successive new optimum inductance-current loci closely approximating said inductance-current curve.