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Analysis and evaluation of soft-switching inverter techniques in electric vehicle applications.

机译：电动汽车应用中软开关逆变器技术的分析和评估。

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摘要

This dissertation presents the systematic analysis and the critical assessment of the AC side soft-switching inverters in electric vehicle (EV) applications. Although numerous soft-switching inverter techniques were claimed to improve the inverter performance, compared with the conventional hard-switching inverter, there is the lack of comprehensive investigations of analyzing and evaluating the performance of soft-switching inverters.; Starting with an efficiency comparison of a variety of the soft-switching inverters using analytical calculation, the dissertation first reveals the effects of the auxiliary circuit's operation and control on the loss reduction. Three types of soft-switching inverters realizing the zero-voltage-transition (ZVT) or zero-current-transition (ZCT) operation are identified to achieve high efficiency operation.; Then one hard-switching inverter and the chosen soft-switching inverters are designed and implemented with the 55 kW power rating for the small duty EV application. The experimental evaluations on the dynamometer provide the accurate description of the performance of the soft-switching inverters in terms of the loss reductions, the electromagnetic interference (EMI) noise, the total harmonic distortion (THD) and the control complexity. An analysis of the harmonic distortion caused by short pulses is presented and a space vector modulation scheme is proposed to alleviate the effect.; To effectively analyze the soft-switching inverters' performance, a simulation based electrical modeling methodology is developed. Not only it extends the EMI noise analysis to the higher frequency region, but also predicts the stress and the switching losses accurately. Three major modeling tasks are accomplished. First, to address the issues of complicated existing scheme, a new parameter extraction scheme is proposed to establish the physics-based IGBT model. Second, the impedance based measurement method is developed to derive the internal parasitic parameters of the half-bridge modules. Third, the finite element analysis software is used to develop the model for the laminated bus bar including the coupling effects of different phases. Experimental results from the single-leg operation and the three-phase inverter operation verify the effectiveness of the presented systematic electrical modeling approach. With the analytical tools verified by the testing results, the performance analysis is further extended to different power ratings and different bus voltage designs.
机译：本文对电动汽车应用中的交流侧软开关逆变器进行了系统的分析和关键的评估。尽管声称许多软开关逆变器技术可以改善逆变器性能，但是与传统的硬开关逆变器相比，缺乏对软开关逆变器性能进行分析和评估的全面研究。本文首先通过分析计算对各种软开关逆变器进行效率比较，首先揭示了辅助电路的运行和控制对降低损耗的影响。确定实现零电压转换（ZVT）或零电流转换（ZCT）操作的三种类型的软开关逆变器，以实现高效率操作。然后，设计并实施了一款额定功率为55 kW的硬开关逆变器和所选的软开关逆变器，适用于小功率电动汽车应用。测功机上的实验评估可从损耗减少，电磁干扰（EMI）噪声，总谐波失真（THD）和控制复杂性等方面准确描述软开关逆变器的性能。分析了短脉冲引起的谐波失真，并提出了一种空间矢量调制方案来减轻这种影响。为了有效地分析软开关逆变器的性能，开发了一种基于仿真的电气建模方法。它不仅将EMI噪声分析扩展到更高的频率区域，而且还可以准确预测应力和开关损耗。完成了三个主要的建模任务。首先，针对现有方案复杂的问题，提出了一种新的参数提取方案，以建立基于物理的IGBT模型。其次，开发了基于阻抗的测量方法，以推导半桥模块的内部寄生参数。第三，使用有限元分析软件开发了包含不同相耦合效应的叠层母线模型。单腿操作和三相逆变器操作的实验结果验证了所提出的系统电气建模方法的有效性。通过测试结果验证的分析工具，性能分析可进一步扩展到不同的额定功率和不同的总线电压设计。

著录项

  • 作者

    Dong, Wei.;

  • 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 p.3963
  • 总页数 289
  • 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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