Development of Soft-Switched AC/DC Converter

我们研究的最终目的是开发一种结构简单、效率高、成本低的软开关交流[直流]变换器。在这项研究中，我们一直计划澄清以下问题：1。一种结构简单、效率高、无电污染的软开关AC/DC变换器的研制及其实验。建立了软开关AC/DC变换器的设计方法。第一学期（1997）：首先，为了不产生电污染，我们开发了一种新型的软开关AC/DC转换器，只使用一个电容器。其次，通过实验得到了基本的工作原理和特性，如功率和失真系数、输出电压及其纹波比等。此外，我们还开发了一种电感换向软开关桥式DC/DC变换器，该变换器具有噪声小、效率高的特点。Final term(1998)：通过对软开关升压型AC/DC变换器的分析，得出了软开关升压型AC/DC变换器的设计方法指南。通过导波方程可以得到功率、畸变系数、输出电压及其纹波比。然后用实验验证了这些结果。上述工作已在IEEJ召开的会议上发表，并被IEEJ期刊接受（将于5月出版）。此外，这项工作将在6月举行的美国IEEE电力电子专家会议上发表。我们将运用我们的方法研究其他软开关AC/DC变换器的分析方法，并尝试将电感换流桥式DC/DC变换器应用到AC/DC变换器中。

The final purpose of our research is a development of a soft-switched AC[DC converter which has a simple construction, high efficiency and low cost. In this research, we have been planning to clear up the following problems :1. Development of a development of soft-switched AC/DC converters which has a simple construction, high efficiency without electric pollution, and its experiment.2. Establishment of the design method of the soft-switched AC/DC converters. First term (1997) : First, not to generate the electric pollution, we developed a novel soft-switched AC/DC converter by using only one capacitor. Next, we have obtained the basic operating principle and characteristics such as the power and distortion factor, output voltage and its ripple ratio by the experiment. urthermore, we have developed a inductor commutation soft-switched bridge type DC/DC converter This converter has the functions of smaller noise and higher efficiency.Final term (1998) : We have obtained the design method guide for the soft-switched boost type AC/DC converter by performing the analysis for that. By the guide equation we can get the power and distortion factor, output voltage and its ripple ratio. Next these results are verified by the experiments. Above work has been presented at the meeting hold by IEEJ and accepted by the journal of IEEJ (will be appeared in May). Furthermore, this work will be presented at the IEEE Power Electronics Specialist Conference of USA hold on June. We will investigate the analysis method for other type soft-switched AC/DC converter applied our method and try to the application of the inductor commutation bridge type DC/DC converter into the AC/DC converter.