{"title":"An Improved Synchronous Rectification LLC Resonant Converter for Hold-Up Time Operation","authors":"Zuohao Luo;Zaijun Wu;Xiangjun Quan;Qinran Hu","doi":"10.1109/TPEL.2025.3535746","DOIUrl":null,"url":null,"abstract":"An innovative improved synchronous rectification <italic>LLC</i> (ISR <italic>LLC</i>) resonant converter is proposed for applications that demand extended hold-up time, such as data center power supplies. The design greatly simplifies the hold up operation circuit by integrating only one switch into the conventional synchronous rectification <italic>LLC</i> converter. Utilizing a fixed-frequency phase shift control strategy, the converter achieves an enhanced voltage gain, which in turn, substantially prolongs the hold-up time. Compared with the traditional pulse frequency modulation <italic>LLC</i> resonant converter, a larger magnetizing inductance can be employed, effectively diminishing the system's conduction losses and elevating conversion efficiency. The topology, operation principle, voltage gain characteristics, and design considerations of the converter will be elaborately introduced. The prototype converter with 200–400 V input and 48 V/500 W output is presented to validate its effectiveness.","PeriodicalId":13267,"journal":{"name":"IEEE Transactions on Power Electronics","volume":"40 6","pages":"8305-8314"},"PeriodicalIF":6.5000,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Power Electronics","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10856370/","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
An innovative improved synchronous rectification LLC (ISR LLC) resonant converter is proposed for applications that demand extended hold-up time, such as data center power supplies. The design greatly simplifies the hold up operation circuit by integrating only one switch into the conventional synchronous rectification LLC converter. Utilizing a fixed-frequency phase shift control strategy, the converter achieves an enhanced voltage gain, which in turn, substantially prolongs the hold-up time. Compared with the traditional pulse frequency modulation LLC resonant converter, a larger magnetizing inductance can be employed, effectively diminishing the system's conduction losses and elevating conversion efficiency. The topology, operation principle, voltage gain characteristics, and design considerations of the converter will be elaborately introduced. The prototype converter with 200–400 V input and 48 V/500 W output is presented to validate its effectiveness.
期刊介绍：
The IEEE Transactions on Power Electronics journal covers all issues of widespread or generic interest to engineers who work in the field of power electronics. The Journal editors will enforce standards and a review policy equivalent to the IEEE Transactions, and only papers of high technical quality will be accepted. Papers which treat new and novel device, circuit or system issues which are of generic interest to power electronics engineers are published. Papers which are not within the scope of this Journal will be forwarded to the appropriate IEEE Journal or Transactions editors. Examples of papers which would be more appropriately published in other Journals or Transactions include: 1) Papers describing semiconductor or electron device physics. These papers would be more appropriate for the IEEE Transactions on Electron Devices. 2) Papers describing applications in specific areas: e.g., industry, instrumentation, utility power systems, aerospace, industrial electronics, etc. These papers would be more appropriate for the Transactions of the Society which is concerned with these applications. 3) Papers describing magnetic materials and magnetic device physics. These papers would be more appropriate for the IEEE Transactions on Magnetics. 4) Papers on machine theory. These papers would be more appropriate for the IEEE Transactions on Power Systems. While original papers of significant technical content will comprise the major portion of the Journal, tutorial papers and papers of historical value are also reviewed for publication.
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