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首页> 外文学位 >Design and implementation of digital controllers for buck and boost converters using linear and nonlinear control methods.
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Design and implementation of digital controllers for buck and boost converters using linear and nonlinear control methods.

机译：使用线性和非线性控制方法设计降压和升压转换器的数字控制器。

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摘要

Issues in the design and implementation of digital controllers for a buck converter and a boost converter using linear and nonlinear control methods were investigated in this dissertation. The small signal models of the buck and boost converters, obtained using standard state space averaging techniques, were utilized in the dissertation. Analog PID and PI controllers were designed for generic buck and boost converters using standard frequency response techniques. The controllers were then transformed into digital controllers.; The small signal models of the converters change with the variations of the operating point. Since the linear controllers were designed based on the small signal models, they were not able to respond effectively to changes in operating point. To achieve a stable and fast response, nonlinear control methods were applied to the buck and boost converters. Since fuzzy controllers don't require a precise mathematical model, they are well suited to nonlinear, time-variant systems. Fuzzy controllers were designed for the buck and boost converters. Two structures of fuzzy controllers are investigated in this dissertation. Only one structure was applied to the buck converter, and both structures were applied to the boost converter to obtain satisfactory response. The second nonlinear control method investigated in this dissertation was sliding mode fuzzy controller. The sliding mode fuzzy controller combined the advantages of both fuzzy controllers and sliding mode controllers. Sliding mode fuzzy controllers are designed for the boost converter.; The digital controllers designed using linear and nonlinear control methods were implemented on a TI DSP. Experimental results for the buck and boost converters were presented and compared. Experimental results verify that nonlinear controllers have superior performance over linear controllers under the change of operating points.
机译：本文研究了采用线性和非线性控制方法的降压变换器和升压变换器的数字控制器的设计和实现中的问题。本文利用标准状态空间平均技术获得的降压和升压转换器的小信号模型。模拟PID和PI控制器是使用标准频率响应技术为通用降压和升压转换器设计的。然后将控制器转换为数字控制器。转换器的小信号模型随工作点的变化而变化。由于线性控制器是基于小信号模型设计的，因此它们无法有效地响应工作点的变化。为了获得稳定和快速的响应，将非线性控制方法应用于降压和升压转换器。由于模糊控制器不需要精确的数学模型，因此非常适合非线性时变系统。模糊控制器是为降压和升压转换器设计的。本文研究了模糊控制器的两种结构。降压转换器仅采用一种结构，升压转换器采用两种结构，以获得令人满意的响应。本文研究的第二种非线性控制方法是滑模模糊控制器。滑模模糊控制器结合了模糊控制器和滑模控制器的优点。滑模模糊控制器是为升压转换器设计的。在TI DSP上实现了使用线性和非线性控制方法设计的数字控制器。提出并比较了降压和升压转换器的实验结果。实验结果证明，在工作点变化的情况下，非线性控制器具有优于线性控制器的性能。

著录项

  • 作者

    Guo, Liping.;

  • 作者单位

    Auburn University.;

  • 授予单位 Auburn University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2006
  • 页码 128 p.
  • 总页数 128
  • 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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