基于临界模式Boost电路与LLC谐振电路的单级交直变换器

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摘要提出一种基于临界模式Boost电路与LLC谐振电路的单级交直变换器,由于其通过输入分压与LLC谐振电路的两个开关管各形成一个临界模式的Boost电路,实现了开关管的集成,降低了系统成本。同时Boost电路工作在临界模式,实现了功率因数校正作用,开关管的集成并没有改变LLC半桥谐振电路的软开关特性,降低了变换器中开关元件的损耗,在一定程度上提高了变换器效率。通过一100 W实验样机的实验验证可知,系统满载时功率因数高达0.975,总谐波失真(THD)为21.5%并满足IEC 63000—3—2的标准,效率为90.8%。

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关键词 ：单级, 交直变换器, 临界模式, LLC

Abstract：A single-stage AC-DC converter based on the boundary conduction mode (BCM) boost circuit and the LLC resonant circuit is proposed in the paper. The input voltage is divided into two parts, each of which forms a BCM boost circuit by sharing one switch of the LLC resonant circuit. Because of the integration, the proposed AC-DC converter is with less components and low cost. At the same time, the boost circuit works in the BCM mode so that the power factor correction function is realized. The integration of the switches does not affect the soft-switching characteristics of the half bridge LLC resonant circuit, so that the converter switching losses is decreased and the converter efficiency is increased. A 100 W prototype is built to prove the analysis, the power factor (PF) is 0.975, the total harmonic distortion (THD) is 21.5% satisfying the IEC 63000—3—2 standard, and its efficiency is 90.8%.

Key words： Single-stage AC-DC converter boundary conduction mode LLC

收稿日期: 2015-10-07 出版日期: 2016-07-12

PACS:

TM46

通讯作者: 王懿杰男,1982年生,副教授,研究方向为单级 AC-DC变换器、超高频功率变换器及无线电能传输技术。E-mail:wangyijie@hit.edu.cn

作者简介: 管乐诗男,1990年生,博士研究生,研究方向为单级AC-DC变换器及超高频功率变换器。E-mail:hitguanyueshi@163.com

引用本文:

管乐诗,王懿杰,王卫,张相军,徐殿国. 基于临界模式Boost电路与LLC谐振电路的单级交直变换器[J]. 电工技术学报, 2016, 31(11): 41-50. Guan Yueshi Wang Yijie Wang Wei Zhang Xiangjun Xu Dianguo. A Single-Stage AC-DC Converter Based on Boundary Conduction Mode Boost Circuit and LLC Resonant Converter. Transactions of China Electrotechnical Society, 2016, 31(11): 41-50.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I11/41

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