| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tape-wound core with low iron loss and low exciting power, which is preferably used for a transformer core and the like. <P>SOLUTION: A tape-wound core includes a soft magnetic alloy thin band 1 manufactured by rapid solidification and recessions 2 formed by irradiating the soft magnetic alloy thin band 1 with a laser beam. In the longitudinal direction of the soft magnetic alloy thin band 1, columns of recessions 2 in the width direction are arranged in substantially prescribed intervals D<SB POS="POST">L</SB>. Doughnut-shaped protrusions are formed around the respective recessions, where each of the doughnut-shaped protrusions has smooth surface with substantially no scattering of molten alloy produced by the irradiation with the laser beam and has a height t<SB POS="POST">2</SB>of 2.0 μm or less. In addition, a ratio t<SB POS="POST">1</SB>/T, which is a ratio of a depth t<SB POS="POST">1</SB>of the recession to a thickness T of the thin band, lies within a range of 0.025 to 0.18. Further, the thin band is wound with a surface on which the recessions are formed facing the outside. <P>COPYRIGHT: (C)2013,JPO&INPIT |
