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Novel three-phase ac-dc converter topologies with power factor correction.

机译：具有功率因数校正功能的新型三相AC-DC转换器拓扑。

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摘要

The dramatic growth in the use of electronic equipment in recent years has resulted in a greater need to ensure that the line current harmonic content of any equipment connected to the ac mains is limited to meet regulatory standards. This requirement is usually satisfied by incorporating some form of Power Factor Correction (PFC) to shape the input phase currents so that they are sinusoidal in nature and are in phase with the input phase voltages.;Novel reduced switch three-phase buck-type ac-dc converter topologies are presented in this thesis that overcome the limitations of the conventional three-phase buck converter. In addition, a variable frequency technique that can minimize the switch voltage stresses of buck-type converters is also presented.;In this thesis, three reduced-switch ac-dc converters are investigated---a quadratic Pulse Width Modulated (PWM) converter, a new quadratic soft-switched quasi-resonant converter with reduced switching frequency operating range, and a new two-switch PWM converter with reduced switch voltage stresses. The steady state behaviors of these converters are discussed and mathematical analysis of their steady-state characteristics is provided. Systematic design procedures are developed for each of the converters and are presented along with the design examples. The feasibility of these converters is confirmed with the experimental results obtained from laboratory prototypes.;Keywords. Three-Phase Rectifiers, Power Factor Correction, Quasi-resonant, Three-Phase Reduced-Switch Converters, Soft-switching, Resonant Converters, Three-Phase Power Conversion.;Three-phase PFC can be actively performed using a six-switch converter either to process the bulk of the power fed to the load or to be as an active filter that processes only a portion of the power fed to the load. Using a six-switch converter, however, is costly and complicated given the number of active switches that must be used and the sophisticated control needed to ensure a good power factor. For power converters of 6 kW or less (a range just high enough where three-phase converters are a better option than single-phase converters), cheaper and simpler methods of performing three-phase active input PFC have been developed using converters with less than six switches, such as the three-phase single-switch buck-type converter. The conventional buck-type converter, however, has several drawbacks that have limited its widespread use, including a limited operating range and very high switch voltage stresses.
机译：近年来，随着电子设备使用的急剧增长，人们更加需要确保与交流电源相连的任何设备的线电流谐波含量都必须符合法规标准。通常可以通过合并某种形式的功率因数校正（PFC）来对输入相电流进行整形来使其满足正弦波特性，并且与输入相电压同相来满足此要求。新颖的开关三相降压型交流电本文提出了-dc转换器拓扑，它克服了常规三相降压转换器的局限性。此外，还提出了一种可以使降压型转换器的开关电压应力最小的变频技术。本文研究了三个降压型交流-直流转换器-一个二次脉冲宽度调制（PWM）转换器，具有减小的开关频率工作范围的新型二次软开关准谐振转换器和具有减小的开关电压应力的新型两开关PWM转换器。讨论了这些转换器的稳态行为，并提供了其稳态特性的数学分析。为每个转换器开发了系统设计程序，并与设计示例一起介绍。从实验室原型获得的实验结果证实了这些转换器的可行性。三相整流器，功率因数校正，准谐振，三相降压开关转换器，软开关，谐振转换器，三相功率转换；可以使用六开关转换器主动执行三相PFC以处理馈入负载的大部分电能，或作为有源滤波器，仅处理馈入负载的一部分电能。然而，鉴于必须使用的有源开关数量以及确保良好功率因数所需的复杂控制，使用六开关转换器既昂贵又复杂。对于6 kW或以下的功率转换器（一个足够高的范围，其中三相转换器比单相转换器更好的选择），已经开发了使用以下功率转换器的更便宜，更简单的执行三相有源输入PFC的方法六个开关，例如三相单开关降压型转换器。然而，传统的降压型转换器具有几个缺点，这些缺点限制了它的广泛使用，包括有限的工作范围和非常高的开关电压应力。

著录项

  • 作者

    Bassan, Sondeep Kaur.;

  • 作者单位

    The University of Western Ontario (Canada).;

  • 授予单位 The University of Western Ontario (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 206 p.
  • 总页数 206
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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