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Performance improvement of power conversion by utilizing coupled inductors.

机译：利用耦合电感改善功率转换性能。

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摘要

This dissertation presents the derivation, analysis and application issues of advanced topologies with coupled inductors. The proposed innovative solutions can achieve significant performance improvement compared to the state-of-the-art technology.; New applications call for high-efficiency high step-up DC-DC converters. The basic topologies suffer from extreme duty ratios and severe rectifier reverse recovery. Utilizing coupled inductor is a simple solution to avoid extreme duty ratios, but the leakage inductance associated with the coupled inductor induces severe voltage stress and loss. An innovative solution is proposed featuring with efficient leakage energy recovery and alleviated rectifier reverse recovery. Impressive efficiency improvement is achieved with a simple topology structure. The coupled inductor switching cell is identified. Topology variations and evaluations are also addressed.; The concept that utilizes coupled inductors to alleviate rectifier reverse recovery is then extended, and new topologies suitable for other applications are generated. The proposed concept is demonstrated to solve the severe rectifier reverse recovery that occurs in continuous current mode (CCM) boost converters. Significant profile reduction and power density improvement can be achieved in front-end CCM power factor correction (PFC) boost converters, which are the overwhelmingly choice for use in telecommunications and server applications.; This dissertation also proposes topologies to realize the single-stage parallel PFC by utilizing coupled inductors. Compared to the state-of-the-art single-stage PFC converters, the proposed topologies introduce a new power flow pattern that minimizes the bulk-capacitor voltage stress and the switch current stress.
机译：本文提出了带有耦合电感器的高级拓扑的推导，分析和应用问题。与最新技术相比，提出的创新解决方案可以显着提高性能。新的应用需要高效，高升压的DC-DC转换器。基本拓扑具有极高的占空比和严重的整流器反向恢复能力。利用耦合电感器是避免极端占空比的简单解决方案，但是与耦合电感器相关的漏感会引起严重的电压应力和损耗。提出了一种创新的解决方案，其特征在于有效的泄漏能量回收和减轻的整流器反向回收。简单的拓扑结构可实现令人印象深刻的效率提高。识别耦合的电感器开关单元。还讨论了拓扑变化和评估。然后扩展了利用耦合电感器减轻整流器反向恢复的概念，并产生了适用于其他应用的新拓扑。为了解决在连续电流模式（CCM）升压转换器中发生的严重整流器反向恢复问题，已证明了所提出的概念。前端CCM功率因数校正（PFC）升压转换器可显着降低外形，并提高功率密度，这是电信和服务器应用中的绝大多数选择。本文还提出了利用耦合电感实现单级并联PFC的拓扑结构。与最先进的单级PFC转换器相比，拟议的拓扑结构引入了一种新的功率流模式，该模式可最大程度地减小大容量电容器的电压应力和开关电流应力。

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  • 作者

    Zhao, Qun.;

  • 作者单位

    Virginia Polytechnic Institute and State University.;

  • 授予单位 Virginia Polytechnic Institute and State University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 196 p.
  • 总页数 196
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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