公开(公告)号：US5651841A

公开(公告)日：1997-07-29

申请号：US504418

申请日：1995-07-20

申请人： Hideharu Moro ,  Naoki Kawakubo ,  Hideaki Sone ,  Hidetoshi Suzuki

发明人： Hideharu Moro ,  Naoki Kawakubo ,  Hideaki Sone ,  Hidetoshi Suzuki

IPC分类号： H01F1/047 ,  H01F1/24 ,  H01F1/26 ,  H01F3/08

CPC分类号： H01F1/24 ,  H01F1/26

摘要： A powder magnetic core having reduced core losses and increased mechanical strength is provided at low costs. The core is obtained by compressing a ferromagnetic metal powder and an insulating agent and then annealing the compressed body. The ferromagnetic metal powder is made up of a substantially spherical form of ferromagnetic metal particles containing Fe, Al and Si. The core has a permeability of at least 50 at 100 kHz, a core loss of up to 450 kW/m.sup.3 at 100 kHz in an applied magnetic field of 100 mT, and a core loss of up to 300 kW/m.sup.3 at 25 kHz in an applied magnetic field of 200 mT.

摘要翻译： 以低成本提供具有减小的磁芯损耗和增加的机械强度的粉末磁芯。 通过压制铁磁性金属粉末和绝缘剂，然后对压缩体进行退火，得到核心。 铁磁性金属粉末由含Fe，Al和Si的强磁性金属颗粒构成。 核心在100 kHz时的渗透率至少为50，在100 mT的施加磁场中，100 kHz时的铁芯损耗高达450 kW / m3，25 kHz时的铁芯损耗高达300 kW / m3 施加磁场为200 mT。