Magnetically biasing bond magnet for improving DC superposition characteristics of magnetic coil
    11.
    发明授权
    Magnetically biasing bond magnet for improving DC superposition characteristics of magnetic coil 有权
    用于改善电磁线圈直流叠加特性的磁偏置磁铁

    公开(公告)号:US06995643B2

    公开(公告)日:2006-02-07

    申请号:US11031230

    申请日:2005-01-06

    IPC分类号: H01F21/00

    摘要: In order to provide an inductance part having excellent DC superposition characteristic and core-loss, a magnetically biasing magnet, which is disposed in a magnetic gap of a magnetic core, is a bond magnet comprising magnetic powder and plastic resin with the content of the resin being 20% or more on the base of volumetric ratio and which has a specific resistance of 0.1Ω·cm or more. The magnetic powder used is rare-earth magnetic powder having an intrinsic coercive force of 5 kOe or more, Curie point of 300° C. or more, and an average particle size of 2.0–50 μm. A magnetically biasing magnet used in an inductance part that is treated by the reflow soldering method has a resin content of 30% or more and the magnetic powder used therein is Sm—Co magnetic powder having an intrinsic coercive force of 10 kOe or more, Curie point of 500° C. or more, and an average particle size of 2.5–50 μm. A thin magnet having a thickness of 500 μm or less can be realized for a small-sized inductance part.

    摘要翻译: 为了提供具有优异的直流叠加特性和磁芯损耗的电感部分,设置在磁芯的磁隙中的磁偏置磁体是包含磁性粉末和树脂含量的塑料树脂的粘结磁体 在体积比的基础上为20%以上,电阻率为0.1mega.cm以上。 使用的磁性粉末是具有5kOe以上的固有矫顽力的稀土磁性粉末,居里点为300℃以上,平均粒径为2.0〜50μm。 用于通过回流焊接方法处理的电感部分中的磁偏置磁体具有30%以上的树脂含量,其中使用的磁性粉末是具有10kOe以上的固有矫顽力的Sm-Co磁性粉末,居里 500℃以上,平均粒径为2.5〜50μm。 对于小型电感部件,可以实现厚度为500μm以下的薄磁体。