| 摘要 |
PURPOSE:To stabilize coil output and to reduce loss when a DC current is superimposed in a magnetic core having a gap at its part by a construction wherein an amorphous magnetic thin belt having the specified composition represented by (FejMk)By (M represents transition metal elements other than Fe, Ni and Co) is attached near the gap. CONSTITUTION:E shape cores 3, 4 are combined to form an air gap Ga between their center portions 3a and 4a, and a thin magnetic substance 5 is attached round the gap Ga. An amorphous magnetic thin belt with composition of (FejMk)xBy is used as the magnetic substance 5. In the above formula, M represents transision metal elements other than Fe, Ni and Co. And there exist the following two relations; x+y=100at%, where y=15-35at%, and j+k=100%, where j=80-99.9% and k=0.1-20%. Replacement of a part of B by Si facilitates conversion into the amorphous property, enhances corrosion resistance and improves a degree of change with aging. A part of B and Si may be also replaced by other vitrifiable elements to further improve a degree of change with aging. |
