Patent ID: 6734771
Filing Date: 2004-05-11
Classification: H01F

Abstract:
An inductor component comprising:a magnetic core comprising at least one gap; an excitation coil disposed on said magnetic core so as to form a magnetic path on said magnetic core; at least one permanent magnet disposed near said at least one gap; at least one first soft magnetic material piece disposed between said at least one permanent magnet and said magnetic core; wherein said at least one first soft magnetic material piece is formed of a soft magnetic material which has a smaller permeability and less eddy current loss than said magnetic core; wherein said at least one permanent magnet has a natural coercive force of at least 10 kOe (79 kA/m) and a Tc of at least 500Â° C.; and wherein said magnetic core comprises a magnetic material selected from the group consisting of silicone steel, amorphous material, Niâ€”Fe alloy, MnZn ferrite and NiZn ferrite.