上海交通大学学报

上海交通大学学报 >

2025 , Vol. 59 >Issue 6: 789 - 799

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2023.389

新型电力系统与综合能源

双变压器型串联谐振变换器全范围软开关设计

  • 李翼男 ,
  • 胡松 ,
  • 李晓东 ,
  • 陈武 ,
  • 钟黎萍 ,
  • 杨晴晴
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  • 1.常熟理工学院 电气与自动化工程学院,江苏 苏州 215500
    2.澳门科技大学 创新工程学院,澳门特别行政区 999078
    3.东南大学 电气工程学院,南京 210096
李翼男(1997—),博士生,从事高频DC-DC变换器研究.
胡 松,副教授;E-mail:husong@cslg.edu.cn.

收稿日期: 2023-08-11

  录用日期: 2023-12-26

  网络出版日期: 2024-03-28

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Dual-Transformer Series Resonant Converter with Full Range ZVS Operation

  • LI Yinan ,
  • HU Song ,
  • LI Xiaodong ,
  • CHEN Wu ,
  • ZHONG Liping ,
  • YANG Qingqing
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  • 1. School of Electrical Engineering and Automation, Changshu Institute of Technology, Suzhou 215500, Jiangsu, China
    2. Faculty of Innovation Engineering, Macau University of Science and Technology, Macau 999078, China
    3. School of Electrical Engineering, Southeast University, Nanjing 210096, China

Received date: 2023-08-11

  Accepted date: 2023-12-26

  Online published: 2024-03-28

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摘要

为了解决双桥谐振变换器(DBRC)轻载条件下回流功率过大、失去零电压开关(ZVS)运行的问题,设计了一种双变压器型串联谐振变换器(DTSRC).该变换器采用双变压器结构,有效降低了变压器两端所受电压应力.通过优化高频变压器变比系数,DTSRC在轻载条件下能够保证开关管实现ZVS运行,降低变换器开关损耗.同时,采用最小电流轨迹(MCT)控制策略,使二次侧电压与电流同相位运行,实现同步整流,消除回流功率,并降低变换器导通损耗.最后,搭建200 W/100 kHz的变换器样机来验证方案的有效性.实验结果表明:DTSRC的开关管在全负载范围内均能实现ZVS运行,整体运行效率超过90%.

关键词： 串联谐振变换器; 零电压开关; 最小电流; 开关损耗; 导通损耗

本文引用格式

李翼男 , 胡松 , 李晓东 , 陈武 , 钟黎萍 , 杨晴晴 . 双变压器型串联谐振变换器全范围软开关设计[J]. 上海交通大学学报, 2025 , 59(6) : 789 -799 . DOI: 10.16183/j.cnki.jsjtu.2023.389

Abstract

A dual-transformer series resonant converter (DTSRC) is proposed to solve the problem of excessive return power and loss of zero voltage switching (ZVS) operation under light load in the dual bridge resonant converter (DBRC). A dual-transformer structure is employed on the proposed converter, which can significantly reduce voltage stress across the transformers. Additionally, the ZVS operation under light-load conditions is achieved and switching losses are minimized by optimizing the turns ratio coefficient. To eliminate backflow power and reduce conduction loss, a minimum current trajectory (MCT) control strategy is implemented for the DTSRC. Thus, synchronous rectification is realized on the secondary side, which makes the converter always operate with minimum current. Finally, a 200 W/100 kHz prototype is built to verify the effectiveness of the proposed solution. The experimental results demonstrate that the ZVS of all active switches is achieved during full power ranges, and the overall operating efficiency of DTSRC exceeds 90%.

Key words： series resonant converter; zero voltage switching (ZVS); minimum current; switching loss; conduction loss

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