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Synthesis and analysis of nonlinear resonant switched converters and linear resonant switched inverters.

机译：非线性谐振开关变换器和线性谐振开关逆变器的综合与分析。

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摘要

The nonlinear resonant switching technique (6) was developed to reduce the switch stresses and conduction loss of linear resonant switched converters, and to enable increase of the switching frequency. Advent of this new concept has raised the following fundamental questions: What types of nonlinear resonant switched converters can be constructed? How to find all of these converters? Another problem is how to analyze these nonlinear resonant switched converters, which are inherently nonlinear systems.; The synthesis of nonlinear quasi-resonant switched converters is based on the recognition of the similarity of nonlinear and linear LC resonance. By use of a Liapunov's energy function and a transformation of coordinates, the state equations of both linear and nonlinear LC resonant circuits are homogeneous, and the stored Liapunov's energy is constant. The reduction of switch stresses of nonlinear resonant converters is explained using state plane trajectories, whose shape varies with the tank characteristics.; The practical realization of a nonlinear tank inductance is discussed. It has been found that the construction of the inductor can be simplified if the inductor is placed in a proper location. The effects on actual inductance characteristics by the geometrical shapes of windings and core, the bias current circuit and the parasitic inductances, are discussed in detail. Guidelines for design of good nonlinear inductors are summarized. Experimental verification is given.; To analyze the nonlinear resonant switched converters, both numerical and approximate approaches are employed. The approximate approach involves modeling the ferrite inductance with a two-value piecewise constant function. The peak currents and the dc conversion function are predicted with reasonable accuracy. The results are experimentally verified.; A new resonant switched push-pull inverter is introduced. The new inverter is comparatively simple and is easier to control. It is not limited to purely resistive loads as the earlier counterparts were but works for all types of loads. The key is the development of two-quadrant resonant switch cells. Two types of two-quadrant switch cells are found valid for dc-to-ac inverter applications. Their properties are analyzed in detail by use of state equations and state plane. Feasibility of the idea of a resonant switched push-pull dc-to-ac inverter is demonstrated by a half bridge inverter. The observed purely sinusoidal output confirms the two-quadrant resonant switch cell is capable of dealing with bidirectional load current, and the resultant converters can be applied to dc-to-ac inverter applications.
机译：非线性谐振开关技术（6）的开发是为了降低线性谐振开关转换器的开关应力和传导损耗，并提高开关频率。这个新概念的出现提出了以下基本问题：可以构造什么类型的非线性谐振开关变换器？如何找到所有这些转换器？另一个问题是如何分析这些非线性谐振开关变换器，它们本质上是非线性系统。非线性准谐振开关变换器的合成基于对非线性和线性LC谐振相似性的认识。通过使用Liapunov的能量函数和坐标变换，线性和非线性LC谐振电路的状态方程都是齐次的，并且所存储的Liapunov的能量是恒定的。非线性谐振变换器的开关应力的减小是利用状态平面轨迹来解释的，其形状随储能特性而变化。讨论了非线性储能电感的实际实现。已经发现，如果将电感器放置在适当的位置，则可以简化电感器的构造。详细讨论了绕组和铁芯的几何形状，偏置电流电路和寄生电感对实际电感特性的影响。总结了优质非线性电感器的设计指南。实验验证。为了分析非线性谐振开关变换器，采用了数值方法和近似方法。近似方法涉及使用二值分段常数函数对铁氧体电感建模。可以以合理的精度预测峰值电流和直流转换功能。结果已通过实验验证。推出了一种新型的谐振开关推挽式逆变器。新的逆变器相对简单，易于控制。它不像以前的同类产品那样仅限于纯电阻性负载，而是适用于所有类型的负载。关键是开发双象限谐振开关单元。发现有两种类型的两象限开关单元适用于DC-AC逆变器应用。通过使用状态方程和状态平面详细分析了它们的属性。半桥逆变器展示了谐振开关推挽式直流-交流逆变器的想法的可行性。观察到的纯正弦波输出证实了双象限谐振开关单元能够处理双向负载电流，并且所得的转换器可以应用于DC-AC逆变器应用。

著录项

  • 作者

    Xu, Renjie.;

  • 作者单位

    University of Colorado at Boulder.;

  • 授予单位 University of Colorado at Boulder.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 1990
  • 页码 167 p.
  • 总页数 167
  • 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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