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Modeling and design of filter networks for high power converters utilizing fast hard switching devices.

机译：利用快速硬开关器件的高功率转换器的滤波网络建模和设计。

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摘要

Modeling and design of filter networks for high power converters has become an important research area in the last decade. High inverter switching speed, which has enabled adjustable speed drives to have greatly improved performance, has raised concerns related to its consequences. One of these concerns is the over-voltage at the motor terminals due to the impedance mismatch between cable and induction motor, depending on the voltage pulse rise time and power cable length.; One of the goals of this research is to develop accurate simulation models for cables and motors that allow a better understanding of the over-voltage problem. Frequency response of the cable and the motor winding are obtained experimentally and suitable models are developed for them to match the experimental results. The cable and induction motor models are implemented using a computational tool like MATLAB©, thereby providing a convenient method to analyze the over-voltage problems that are inherent in long cable PWM drives. A lossy line representation of the cable is proposed, modeled by distributed lumped elements. The model is used to evaluate the traveling wave voltage and an algebraic analysis is developed to choose an adequate number of segments as function of the pulse rise time and cable characteristics. Distributed-parameter representation of the power cable is also studied using the professional software PSCAD/EMTDC©, which is more suitable for very long cable PWM drives. Zero-sequence models for cable and motor are also developed aiming the calculation of the common-mode current. Simulation and experimental results are presented analyzing the over-voltage problem for a range of cable lengths for a standard 3 hp induction motor, showing the suitability of the developed simulation models.; Filter network approaches are suggested to mitigate the over-voltage problem and a filter design is obtained by the advance of the simulation tool built in MATLAB©. Experimental results are also obtained, confirming the suitability of the simulation analysis. Experimental results of the voltage distribution inside the machine winding are also presented demonstrating the impact of the filter topologies on the over-voltage mitigation.
机译：在过去的十年中，用于大功率转换器的滤波器网络的建模和设计已成为重要的研究领域。较高的逆变器开关速度使可调速驱动器的性能大大提高，引起了人们对其后果的担忧。这些问题之一是电缆和感应电动机之间的阻抗不匹配所导致的电动机端子上的过电压，具体取决于电压脉冲上升时间和电源电缆长度。这项研究的目标之一是为电缆和电动机开发精确的仿真模型，以更好地了解过电压问题。通过实验获得电缆和电动机绕组的频率响应，并为它们开发合适的模型以匹配实验结果。电缆和感应电动机模型是使用 MATLAB ©之类的计算工具实现的，从而提供了一种方便的方法来分析长电缆PWM驱动器固有的过电压问题。提出了电缆的有损线表示，并通过分布式集总元素进行建模。该模型用于评估行波电压，并进行代数分析以根据脉冲上升时间和电缆特性选择适当的线段数量。还使用专业软件 PSCAD / EMTDC ©研究了电源线的分布参数表示法，该软件更适用于超长电缆PWM驱动器。还针对计算共模电流而开发了用于电缆和电动机的零序模型。给出了仿真和实验结果，分析了标准3 hp感应电动机在一定长度的电缆上的过电压问题，显示了开发的仿真模型的适用性。建议使用滤波器网络方法来缓解过电压问题，并通过内置于 MATLAB ©的仿真工具的改进来获得滤波器设计。还获得了实验结果，证实了仿真分析的适用性。还给出了电机绕组内部电压分布的实验结果，表明了滤波器拓扑结构对缓解过压的影响。

著录项

  • 作者

    Moreira, Alessandro Fernandes.;

  • 作者单位

    The University of Wisconsin - Madison.;

  • 授予单位 The University of Wisconsin - Madison.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 257 p.
  • 总页数 257
  • 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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