Soft Start-up of Three Phase CLLC Converter Based on State Trajectory Control

2021 IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2021-06-14 DOI:10.1109/APEC42165.2021.9487467

Ahmed Nabih, Feng Jin, Qiang Li, F. Lee

{"title":"Soft Start-up of Three Phase CLLC Converter Based on State Trajectory Control","authors":"Ahmed Nabih, Feng Jin, Qiang Li, F. Lee","doi":"10.1109/APEC42165.2021.9487467","DOIUrl":null,"url":null,"abstract":"The bi-directional five-element CLLC resonant converter is attracting great attention for battery charger applications. The three-phase interleaved CLLC converter can deliver more power with lower conduction losses as compared to the single-phase CLLC. Resonant converters, including the three-phase interleaved CLLC, suffer from high levels of inrush current during startup as well as short circuiting. A proper soft startup needs to be implemented to limit the resonant current during startup. This paper discusses the soft start-up of single-phase and three-phase interleaved CLLC converters based on state trajectory control. The state trajectory of the CLLC primary resonant tank is simplified and treated like an LLC. Optimal trajectory analysis during startup is implemented to limit the resonant tank and to achieve a fast startup. The three-phase interleaved CLLC is reduced to the full-bridge CLLC for easier analysis and control, then is switched back to three-phase interleaved operation after a successful soft startup. Experimental results are provided for a 12kW 500kHz 850V CLLC converter using digital MCU F28379D.","PeriodicalId":7050,"journal":{"name":"2021 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE Applied Power Electronics Conference and Exposition (APEC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APEC42165.2021.9487467","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 5

Abstract

The bi-directional five-element CLLC resonant converter is attracting great attention for battery charger applications. The three-phase interleaved CLLC converter can deliver more power with lower conduction losses as compared to the single-phase CLLC. Resonant converters, including the three-phase interleaved CLLC, suffer from high levels of inrush current during startup as well as short circuiting. A proper soft startup needs to be implemented to limit the resonant current during startup. This paper discusses the soft start-up of single-phase and three-phase interleaved CLLC converters based on state trajectory control. The state trajectory of the CLLC primary resonant tank is simplified and treated like an LLC. Optimal trajectory analysis during startup is implemented to limit the resonant tank and to achieve a fast startup. The three-phase interleaved CLLC is reduced to the full-bridge CLLC for easier analysis and control, then is switched back to three-phase interleaved operation after a successful soft startup. Experimental results are provided for a 12kW 500kHz 850V CLLC converter using digital MCU F28379D.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

基于状态轨迹控制的三相CLLC变换器软启动

双向五元CLLC谐振变换器在电池充电器中的应用备受关注。与单相CLLC相比，三相交错CLLC变换器可以提供更大的功率和更低的传导损耗。谐振变换器，包括三相交错CLLC，在启动和短路期间遭受高水平的浪涌电流。需要适当的软启动来限制启动时的谐振电流。本文讨论了基于状态轨迹控制的单相和三相交错CLLC变换器的软启动问题。对CLLC主谐振槽的状态轨迹进行了简化，并将其视为LLC，在启动过程中进行了最优轨迹分析，以限制谐振槽，实现快速启动。三相交错CLLC被简化为全桥CLLC，以便于分析和控制，然后在成功的软启动后切换回三相交错操作。给出了采用数字单片机F28379D设计的12kW 500kHz 850V CLLC变换器的实验结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

2021 IEEE Applied Power Electronics Conference and Exposition (APEC)

自引率

0.00%

发文量

期刊最新文献

Challenges and Solutions for Non-Inverting Buck-Boost Converters Parameter Estimator-based Power Control Strategy of Microgrid Considering Nonlinear Inductor Analysis and Evaluation of Air-core Two-coil Wireless Power Transfer System Configurations Selective Coordination of GaN-Based Solid State Circuit Breakers 3300-V SiC MOSFET Short-Circuit Reliability and Protection