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首页> 外文会议>2016 COES annual conference proceedings >Point-of-Load Inductor with High Swinging and Low Loss at Light Load
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Point-of-Load Inductor with High Swinging and Low Loss at Light Load

机译：负载点电感，在轻载时具有高摆幅和低损耗

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摘要

Point-of-load converter at light load has lowrnefficiency owing to the “fixed losses” such as core loss and acrnwinding loss. This paper focuses on two-dimensional (2D)rngapping of a ferrite core to shape inductance versus load currentrnto reduce inductor loss at light load. Since the maximumrninductance of conventional stepped gap is limited by the crosssectionalrnarea of the thin gap, a 2D gap is formed by joining twornorthogonal gaps to gain flexibility. Higher inductance is achievedrnat light load compared with uniform-gap and stepped-gaprngeometries having the same volume and dc resistance. Acrnresistance is reduced at light load thanks to a magnetic path thatrnsteers ac flux away from the winding. Two C-cores with 2D gaprnwere fabricated and tested on a buck converter with 50%rnreduced total inductor loss at 10% load current.
机译：由于存在“固定损耗”，例如铁心损耗和绕组损耗，轻载负载点转换器的效率较低。本文着重于对铁氧体磁芯进行二维（2D）搭接，以形成电感与负载电流的关系，以减少轻载时的电感损耗。由于常规阶梯状间隙的最大电感受薄间隙横截面的限制，因此通过将两个正交间隙连接起来可形成2D间隙，从而获得柔韧性。与具有相同体积和直流电阻的均隙和阶梯式几何结构相比，在轻负载下可获得更高的电感。由于磁路使交流磁通远离绕组，磁阻在轻载时降低了。在降压转换器上制造并测试了两个具有2d间隙的C芯，并在10％负载电流下将总电感损耗降低了50％。

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  • 来源
  • 会议地点 Blacksburg VA(US)
  • 作者

    Ting Ge; Khai Ngo; Jim Moss;

  • 作者单位

    Bradley Department of Electrical and Computer EngineeringVirginia Polytechnic Institute and State UniversityBlacksburg, VA 24061, USAEmail: gting@vt.edu;

    Bradley Department of Electrical and Computer EngineeringVirginia Polytechnic Institute and State UniversityBlacksburg, VA 24061, USA;

    Texas Instruments, Inc.Santa Clara, CA 95050, USA;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    2D gap; Nonlinear inductance; Loss at light load; rnSwinging inductor;

    机译：二维间隙;非线性电感;轻载时的损耗;摆动电感;

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