| 简介 |
PROBLEM TO BE SOLVED : To provide a low price magnetic core having DC superimposing characteristic which assures excellent temperature characteristic and core loss characteristic wherein the magnet for magnetic bias is formed by arranging a permanent magnet in the vicinity a gap in order to supply magnetic bias from both ends of the gap to the magnetic core including the gap to at least one or more areas in the magnetic path. SOLUTION : As the permanent magnet 1 to be inserted to the gap formed at an EE core 2, a bond magnet is used which is composed of rare-earth magnet powder having intrinsic coersive force of 5 KOe ore more, a Curie temperature Tc of 300 deg.C or higher, specific resistance of 0.1 Ωcm or higher, saturated magnetic flux density Br of 1000 to 4000 G and magnetic field intensity bHc of 0.9 KOe or higher and resin. |
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