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Ultra-Small DC-Link Capacitor, GaN-Based Low Power AC Motor Drive for Low Cost Applications

机译：超小型直流链路电容器，基于GaN的低功耗交流电动机驱动器，适用于低成本应用

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摘要

In some motor drive applications, such as fans and pumps, high performance, in general, is not required and regeneration is not needed. These application areas are sensitive to price and therefore reduction of weight and volume is very beneficial. The size and cost of passive components have become one of main concerns in terms of cost, volume, and weight. In the past, researchers tried to reduce the number of semi-conductors switches since the cost of semi-conductor switches was more significant than that of passive components. However, in these days, reducing passive components such as inductors, transformers, and electrolytic capacitors is much more significant than to reduce active elements in terms of size and cost effectiveness. In addition, the lifespan of electrolytic capacitors is typically shorter than the other components in the drive systems. Reducing the dc bus capacitance offers the improved input current THD, resulting in reduced input filter requirements. The benefits of ultra-small dc link drives are summarized as below: a) Improvement of input current THD due to absence of huge capacitance b) Cheaper, smaller, and lighter due to reduction of passive components c) Higher reliability, if electrolytic capacitors are replaced with film capacitors. This thesis presents the design of an ultra-small DC link capacitor motor drive by utilizing wide band gap (WBG) based power electronics. It examines the benefits of eliminating the dc-choke in a motor drive and reducing the size of the dc-link capacitor while designing the motor drive using Gallium Nitride (GaN) power transistors. Real-time simulation is performed to verify the performance of the developed drive and the analysis. The system performance is further validated with experimental results using a hardware prototype of the motor drive built with GaN-based transistors.
机译：在某些电动机驱动应用中，例如风扇和泵，通常不需要高性能，也不需要再生。这些应用领域对价格敏感，因此减轻重量和体积非常有益。就成本，体积和重量而言，无源组件的尺寸和成本已成为主要关注的问题之一。过去，研究人员试图减少半导体开关的数量，因为半导体开关的成本比无源元件的成本高得多。但是，如今，就尺寸和成本效益而言，减少无源元件（如电感器，变压器和电解电容器）比减少有源元件更为重要。另外，电解电容器的寿命通常比驱动系统中的其他组件短。降低直流总线电容可提供改善的输入电流THD，从而降低对输入滤波器的要求。超小型直流链路驱动器的优点总结如下：a）由于没有大电容而改善了输入电流THD b）由于减少了无源元件而使价格更便宜，更小且更轻c）如果使用电解电容器，则可靠性更高。用薄膜电容器代替。本文提出了一种基于宽带隙（WBG）的电力电子技术，用于超小型直流环节电容器电动机驱动器的设计。它探讨了在使用氮化镓（GaN）功率晶体管设计电动机驱动器时消除电动机驱动器中的直流扼流圈并减小直流链路电容器尺寸的好处。进行实时仿真以验证开发的驱动器和分析的性能。使用基于GaN的晶体管构建的电机驱动器的硬件原型，通过实验结果进一步验证了系统性能。

著录项

  • 作者

    Gonzalez, Reynaldo Sergio.;

  • 作者单位

    The University of Texas at San Antonio.;

  • 授予单位 The University of Texas at San Antonio.;
  • 学科 Engineering.
  • 学位 M.S.
  • 年度 2018
  • 页码 52 p.
  • 总页数 52
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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