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    • 7. 发明授权
    • Composite magnetic core for switch-mode power converters
    • 用于开关电源转换器的复合磁芯
    • US06980077B1
    • 2005-12-27
    • US10922068
    • 2004-08-19
    • Sriram ChandrasekaranVivek MehrotraJian Sun
    • Sriram ChandrasekaranVivek MehrotraJian Sun
    • H01F3/10H01F27/24H01F27/255
    • H01F27/255H01F2003/106H01F2027/2814H01F2027/348
    • A composite magnetic core formed of a high permeability material and a lower permeability, high saturation flux density material prevents core saturation without an air gap and reduces eddy current losses and loss of inductance. The composite core is configured such that the low permeability, high saturation material is located where the flux accumulates from the high permeability sections. The presence of magnetic material having a relatively high permeability keeps the flux confined within the core thereby preventing fringing flux from spilling out into the winding arrangement. This composite core configuration balances the requirements of preventing core saturation and minimizing eddy current losses without increasing either the height or width of the core or the number of windings.
    • 由高磁导率材料和低磁导率,高饱和磁通密度材料形成的复合磁芯防止磁芯饱和而没有气隙,并减少涡流损耗和电感损耗。 复合芯构造成使得低磁导率高饱和材料位于磁通量从高磁导率部分积聚的位置。 具有较高磁导率的磁性材料的存在使磁通量保持在磁芯内,从而防止边缘焊剂溢出到卷绕装置中。 该复合芯体配置平衡了防止磁芯饱和的要求,并最大限度地减小涡流损耗,而不会增加磁芯的高度或宽度或绕组数量。