电源学报2025，Vol.23Issue(1)：1-10,10.DOI:10.13234/j.issn.2095-2805.2025.1.1
三电平双向全桥多谐振DC-DC变换器研究
Research on Three-level Bidirectional Full-bridge Multi-resonant DC-DC Converter
摘要
Abstract
In an energy storage system,the voltage level on the DC bus side is usually higher,while the voltage level on the battery side is lower with a wide variation range.Under this background,a three-level bidirectional full-bridge multi-resonant DC-DC converter topology is proposed,in which a three-level structure is adopted on the high-voltage side to reduce the voltage stress of the switch.The resonant cavity is designed as an LLCLC multi-resonant structure with auxiliary inductance,so that the left and right sides of the equivalent circuit is symmetrical,thus realizing the peer-to-peer driving control of forward and reverse operations and the bidirectional transmission of power.An improved synchronous pulse-frequency-modulation control strategy is adopted,so that the full-range zero-voltage-switch can be realized for switches on the high-and low-voltage side regardless of the forward or reverse operation.Compared with the traditional LLC resonant topologies,the proposed topology can achieve a wider range of voltage gain in a narrower frequency range.Through the optimization design of resonant cavity parameters,the converter can transmit the current fundamental wave and third harmonic power at the same time,thereby improving the energy transmission efficiency.Finally,a 2 kW experimental prototype was built,and experimental results verified the theoretical analysis.关键词
三电平/双向直流变换器/多谐振/软开关/高增益Key words
Three-level/bidirectional DC converter/multi-resonance/soft switch/high gain分类
动力与电气工程引用本文复制引用
张纯江,李旭明,刘明,郭忠南,阚志忠..三电平双向全桥多谐振DC-DC变换器研究[J].电源学报,2025,23(1):1-10,10.基金项目
国家自然科学基金资助项目(52277203)This work is supported by National Natural Science Foundation of China under the grant 52277203 （52277203）
