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Three-Phase High-Frequency Transformer Isolated Soft-Switching DC-DC Resonant Converters.

机译：三相高频变压器隔离式软开关DC-DC谐振转换器。

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摘要

There is an increasing demand for power converters with small size, light weight, high conversion efficiency and higher power density. Also, in many applications, there is a need for dc-to-dc converters to accept dc input voltage and provide regulated and/or isolated dc output voltage at a desired voltage level including telecommunications equipment, process control systems, and in industry applications.;This thesis presents the analysis, design, simulation and experimental results of three-phase high-frequency transformer isolated resonant converters. The first converter presented is a three-phase LCC-type dc-dc resonant converter with capacitor output filter including the effect of the magnetizing inductance of the three-phase HF transformer. The equivalent ac load resistance is derived and the converter is analyzed by using approximation analysis approach. Base on this analysis, design curves have been obtained and a design example is given. Intusoft simulation results for the designed converter are given for various input voltage and for different load conditions. The experimental verification of the designed converter performance was established by building a 300 W rated power converter and the experimental results have been given. It is shown that the converter works in zero-voltage switching (ZVS) at various input voltage and different load conditions.;A three-phase (LC)(L)-type dc-dc series-resonant converter with capacitive output filter has been proposed. Operation of the converter has been presented using the operating waveforms and equivalent circuit diagrams during different intervals. An approximate analysis approach is used to analyze the converter operation, and design procedure is presented with a design example. Intusoft simulation results for the designed converter are given for input voltage and load variations. Experimental results obtained in a 300 W converter are presented. Major advantages of this converter are the leakage and magnetizing inductances of the high-frequency transformer are used as part of resonant circuit and the output rectifier voltage is clamped to the output voltage. The converter operates in soft-switching for the inverter switches for the wide variations in supply voltage and load and it requires narrow switching frequency variation (compared to LCC-type) to regulate the output voltage.;A three-phase high-frequency transformer isolated interleaved (LC)(L)-type dc-dc series-resonant converter with capacitive output filter using fixed frequency control is proposed. The converter operation for different modes is presented using the operating waveforms and equivalent circuit diagrams during different intervals. This converter is modeled and then analyzed using the approximate complex ac circuit analysis approach. Based on the analysis, design curves were obtained and the design procedure is presented with a design example. The designed converter is simulated using PSIM software to predict the performance of the converter for variations in supply voltage and load conditions. The converter operates in ZVS for the inverter switches with minimum input voltage and loses ZVS for two switches in each bridge for higher input voltages.
机译：对于尺寸小，重量轻，转换效率高和功率密度高的功率转换器的需求不断增长。另外，在许多应用中，需要DC-DC转换器以接受DC输入电压并以期望的电压水平提供经调节和/或隔离的DC输出电压，包括电信设备，过程控制系统以及工业应用。 ；本文介绍了三相高频变压器隔离谐振变换器的分析，设计，仿真和实验结果。提出的第一个转换器是带有电容器输出滤波器的三相LCC型DC-DC谐振转换器，其中包括三相HF变压器的励磁电感的影响。推导出等效交流负载电阻，并使用近似分析方法对转换器进行分析。在此基础上，获得了设计曲线，并给出了设计实例。针对各种输入电压和不同负载条件，给出了针对所设计转换器的Intusoft仿真结果。通过构建额定功率为300 W的功率转换器，对设计的转换器性能进行了实验验证，并给出了实验结果。结果表明，该转换器在各种输入电压和不同负载条件下都可在零电压开关（ZVS）下工作。建议。在不同的时间间隔内，使用工作波形和等效电路图介绍了转换器的工作情况。采用近似分析方法对变流器的运行进行了分析，并给出了设计实例。针对输入电压和负载变化，给出了针对所设计转换器的Intusoft仿真结果。介绍了在300 W转换器中获得的实验结果。该转换器的主要优点是将高频变压器的漏感和励磁电感用作谐振电路的一部分，并且将输出整流器电压钳位到输出电压。该转换器在逆变器开关的软开关中工作，以适应电源电压和负载的广泛变化，并且它需要狭窄的开关频率变化（与LCC型相比）来调节输出电压。;三相高频变压器隔离提出了一种采用固定频率控制的电容输出滤波器的交错（LC）（L）型dc-dc串联谐振变换器。使用不同时间间隔内的工作波形和等效电路图介绍了不同模式下的转换器操作。对该转换器建模，然后使用近似复杂的交流电路分析方法进行分析。在分析的基础上，获得了设计曲线，并给出了设计实例。使用PSIM软件对设计的转换器进行仿真，以预测电源电压和负载条件变化时转换器的性能。对于具有最小输入电压的逆变器开关，转换器以ZVS工作，而对于更高输入电压，每个电桥中的两个开关都失去ZVS。

著录项

  • 作者

    Almardy, Mohamed S. M.;

  • 作者单位

    University of Victoria (Canada).;

  • 授予单位 University of Victoria (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 215 p.
  • 总页数 215
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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