二极管箝位LCC谐振变流器特性的理论分析

作者：盛立丞，刘军，邓焰，何湘宁 日期：2010-06-21/span> 浏览：3258 查看PDF文档

二极管箝位LCC谐振变流器特性的理论分析
盛立丞，刘军，邓焰，何湘宁
（浙江大学 电力电子技术研究所，浙江 杭州 310027）

摘要：针对目前缺少二极管箝位LCC谐振变流器电流断续模式的精确理论分析，尤其是在高频高压应用场合引入高频高压变压器寄生参数时的特性分析，进行深入的研究。通过对电路工作原理的详细分析、数学推导得到了能够全面描述电路工作过程并且只含有电压转换比以及并联与串联电容比两个变量的数学表达式，并以此为基础给出了电路的特性表达式，主要包括以上两参数对峰值电流、开关频率、负载情况等的影响。研究结果表明，所得到的理论分析结果对工作于电流断续模式的二极管箝位LCC谐振式变流器在高频、高压领域的应用提供了理论依据和指导。
关键词：变压器寄生参数；二极管箝位；谐振；电流断续模式；软开关
中图分类号：TM46；TM910.1文献标识码：A文章编号：1001-4551(2010)03-0075-05

Analysis of diode clamp LCC resonant converter

SHENG Licheng, LIU Jun, DENG Yan, HE Xiangning
(Institute of Power Electronics, Zhejiang University, Hangzhou 310027, China)

Abstract: Aiming at the lack of theoretical analysis in this field, especially the characteristic analysis in high frequency high voltage application where the parasitic parameter of high frequency high voltage transformer must be taken into consideration, the diode clamp LCC resonant converter operating under discontinuous current mode(DCM) was analyzed carefully. Mathematical expressions which describe commutation details of the circuit were given, which includes only two variables, the voltage transfer ratio and the ratio of parallel capacitor and series capacitor. The results show that the theoretical basis and guidance are provided by the theoretical analytic result of the DCM diode clamp LCC resonant in high frequency high voltage applications.
Key words: parasitic parameter of transformer; diode clamp; resonant; discontinuous current mode(DCM); soft switch