| 摘要 |
PURPOSE:To obtain the magnetic core having remarkably small core loss in a high-frequency region by bringing surface roughness calculated from the maximum value of the thickness and the mean value of the thickness of an amorphous magnetic alloy thin band forming the magnetic core to predetermined value or lower. CONSTITUTION:The magnetic core consists of the amorphous magnetic alloy thin band, and is shaped so that the value of the surface roughness calculated from the maximum value of the thickness and the mean value of the thickness of the thin band satisfies a condition shown in a formulaI. Where W, d, l, p are each indicate the weight, width, length and density of the thin band. When the surface roughness displayed in the formulaIexceeds 0.30, the state of the unevenness of the surface of the thin band becomes remarkable, the core loss at high frequency is increased markedly, and the thin band is not fitted for use. It is preferable that the maximum value t of thickness is set within the range of 5mum<=t<=30mum in the thin band. |
