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Advanced techniques of single-stage power factor correction AC-DC converters.

机译：单级功率因数校正AC-DC转换器的先进技术。

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摘要

Power supplies connected to AC mains introduce harmonic currents in the utility. It is very well known that these harmonic currents cause several problems such as voltage distortion, heating, noises, and reduce the capability of the line to provide energy. This fact and the presence of Standards or Recommendations have forced the industry to use power factor correction (PFC) in power supplies.; This dissertation aims to improve the performance of the single-stage power factor correction (S2 PFC) AC-DC converters with reduced cost. In the dissertation's first two chapters, an overview of current techniques for single-stage PFC AC-DC power systems is given. Further, issues and challenges of the existing systems are addressed in detail.; In the dissertation's third chapter, the existing S2 PFC AC-DC approaches are topologically generalized to pursue a methodology for potential topology variation, thereafter to overcome the issues that block the applications of single stage PFC AC-DC conversion approaches.; In the dissertation's following chapters, applications of the proposed translation rule are discussed, and the subject of design of high quality S2 PFC AC-DC power systems is investigated from the perspective of cost-effectivity, simplifying the conversion process while simultaneously keeping acceptable performance. The focus is put on alleviating voltage stress and current stresses, and better energy management in power conversion that features reduced complexity and higher efficiency.
机译：连接到交流电源的电源会在设备中引入谐波电流。众所周知，这些谐波电流会引起一些问题，例如电压失真，发热，噪声，并降低线路提供能量的能力。这一事实以及标准或建议书的存在迫使业界在电源中使用功率因数校正（PFC）。本文旨在以降低的成本提高单级功率因数校正（S 2 PFC）AC-DC转换器的性能。在论文的前两章中，概述了单级PFC AC-DC电源系统的当前技术。此外，详细解决了现有系统的问题和挑战。在论文的第三章中，对现有的S 2 PFC AC-DC方法进行了拓扑概括，以寻求一种潜在的拓扑变化方法，从而克服了阻碍单级PFC AC-DC应用的问题。转换方法。在接下来的几章中，将讨论所提出的转换规则的应用，并从成本效益的角度研究高质量S 2 PFC AC-DC电力系统的设计主题，从而简化了设计过程。转换过程，同时保持可接受的性能。重点放在减轻电压应力和电流应力，以及在功率转换中改善能耗管理（降低复杂性和提高效率）方面。

著录项

  • 作者

    Wu, Wenkai.;

  • 作者单位

    University of Central Florida.;

  • 授予单位 University of Central Florida.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 125 p.
  • 总页数 125
  • 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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