Abstract
In LLC resonant converters, synchronous rectification (SR), which replaces the secondary side diodes with metal-oxide-semiconductor field-effect transistors, is mainly mentioned to improve further efficiency. Among SR methods, the sensorless method has gained significant attention because it does not require additional circuits, which can maintain the cost and power density of system. However, conventional sensorless methods cannot achieve high efficiency in wide output voltage range due to their model inaccuracy. Also, these methods might cause an early turn-ON of SR in the step-down area, resulting in the circulating current that reduces efficiency and stability. To solve these problems, the proposed SR method is newly proposed by using the time-domain analysis method, which obtains high SR accuracy in wide output voltage range. Moreover, it can prevent the circulating current by introducing the accurate turn-ON timing of SR. First, the overall process descriptions and SR strategies of LLC resonant converter are described. After that, the proposed SR method is mathematically expressed by the time-domain analysis method. Finally, its effectiveness is evaluated by the simulation test.
Original language | English |
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Title of host publication | 2024 IEEE Applied Power Electronics Conference and Exposition, APEC 2024 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 2691-2696 |
Number of pages | 6 |
ISBN (Electronic) | 9798350316643 |
DOIs | |
Publication status | Published - 2024 |
Event | 39th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2024 - Long Beach, United States Duration: 2024 Feb 25 → 2024 Feb 29 |
Publication series
Name | Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC |
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ISSN (Print) | 1048-2334 |
Conference
Conference | 39th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2024 |
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Country/Territory | United States |
City | Long Beach |
Period | 24/2/25 → 24/2/29 |
Bibliographical note
Publisher Copyright:© 2024 IEEE.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering