Magnetic core and method of manufacturing the same
First Claim
Patent Images
1. A magnetic core of a compressed compact comprising a mixture of magnetic powder and a spacing material, wherein the distance between adjacent particles of said magnetic powder is controlled by said spacing material and wherein the distance between adjacent magnetic particles is represented by δ
- and the mean particle size of magnetic powder is represented by d, and the relationship of 1031 3 ≦
δ
/d ≦
10-1 is satisfied in 70% or more of the magnetic powder.
1 Assignment
0 Petitions
Accused Products
Abstract
A magnetic core of a compressed compact comprises a mixture of magnetic powder and a spacing material, wherein the distance between adjacent magnetic powder particles is controlled by the spacing material. In this constitution, a magnetic core low in core loss, high in magnetic permeability, and excellent in direct-current superposing characteristic is realized.
36 Citations
15 Claims
-
1. A magnetic core of a compressed compact comprising a mixture of magnetic powder and a spacing material, wherein the distance between adjacent particles of said magnetic powder is controlled by said spacing material and wherein the distance between adjacent magnetic particles is represented by δ
- and the mean particle size of magnetic powder is represented by d, and the relationship of 1031 3 ≦
δ
/d ≦
10-1 is satisfied in 70% or more of the magnetic powder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- and the mean particle size of magnetic powder is represented by d, and the relationship of 1031 3 ≦
-
13. A method of manufacturing a magnetic core comprising the steps of:
-
compression-molding a mixture comprising magnetic powder and a spacing material; and heating after the step of compression-molding, wherein the distance between adjacent particles of said magnetic powder is controlled by said spacing material and wherein the distance between adjacent magnetic particles is represented by δ and
the mean particle size of magnetic power is represented by d, and the relationship of 10-3 ≦
δ
/d≦
10-1 is satisfied in 70% or more of the magnetic power. - View Dependent Claims (14, 15)
-
Specification