Synchronous rectification of LLC resonant converters based on resonant inductor voltage
Synchronous rectification (SR) technology has been a critical technology for LLC converters to achieve high efficiency and power density. However, conventional SR driving methods face challenges in terms of light-load condition, module size, switching accuracy, and circuit complexity. This paper pro...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-06-01
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| Series: | Frontiers in Energy Research |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1199397/full |
| _version_ | 1797792304900079616 |
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| author | Zuohao Luo Zuohao Luo Zaijun Wu Xiangjun Quan Xingfeng Xie Xingfeng Xie Xiaobo Dou Qinran Hu |
| author_facet | Zuohao Luo Zuohao Luo Zaijun Wu Xiangjun Quan Xingfeng Xie Xingfeng Xie Xiaobo Dou Qinran Hu |
| author_sort | Zuohao Luo |
| collection | DOAJ |
| description | Synchronous rectification (SR) technology has been a critical technology for LLC converters to achieve high efficiency and power density. However, conventional SR driving methods face challenges in terms of light-load condition, module size, switching accuracy, and circuit complexity. This paper proposes an SR driving strategy based on resonant inductor voltage (RLV) to address those issues. This RLV-SR driving strategy does not require current sensors and is insensitive to rectifier parasitic parameters. In addition, the RLV-SR driving strategy can be applied in a relatively wide operating frequency range and load conditions. Experimental results based on a 100-W/24-V LLC converter are presented to verify the effectiveness of the proposed RLV-SR driving strategy. Furthermore, the error of turn-on time caused by stray inductance is significantly reduced compared with the conventional VDS-ON sensing method, which improves the power converter’s efficiency. |
| first_indexed | 2024-03-13T02:31:15Z |
| format | Article |
| id | doaj.art-8e1f0b7a22e74071a6712aa57202d851 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-03-13T02:31:15Z |
| publishDate | 2023-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-8e1f0b7a22e74071a6712aa57202d8512023-06-29T17:11:34ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-06-011110.3389/fenrg.2023.11993971199397Synchronous rectification of LLC resonant converters based on resonant inductor voltageZuohao Luo0Zuohao Luo1Zaijun Wu2Xiangjun Quan3Xingfeng Xie4Xingfeng Xie5Xiaobo Dou6Qinran Hu7School of Electrical Engineering, Southeast University, Nanjing, ChinaCollege of Electrical Engineering and Information Engineering, Lanzhou University of Technology, Lanzhou, ChinaSchool of Electrical Engineering, Southeast University, Nanjing, ChinaSchool of Electrical Engineering, Southeast University, Nanjing, ChinaSchool of Electrical Engineering, Southeast University, Nanjing, ChinaCollege of Electrical Engineering and Information Engineering, Lanzhou University of Technology, Lanzhou, ChinaSchool of Electrical Engineering, Southeast University, Nanjing, ChinaSchool of Electrical Engineering, Southeast University, Nanjing, ChinaSynchronous rectification (SR) technology has been a critical technology for LLC converters to achieve high efficiency and power density. However, conventional SR driving methods face challenges in terms of light-load condition, module size, switching accuracy, and circuit complexity. This paper proposes an SR driving strategy based on resonant inductor voltage (RLV) to address those issues. This RLV-SR driving strategy does not require current sensors and is insensitive to rectifier parasitic parameters. In addition, the RLV-SR driving strategy can be applied in a relatively wide operating frequency range and load conditions. Experimental results based on a 100-W/24-V LLC converter are presented to verify the effectiveness of the proposed RLV-SR driving strategy. Furthermore, the error of turn-on time caused by stray inductance is significantly reduced compared with the conventional VDS-ON sensing method, which improves the power converter’s efficiency.https://www.frontiersin.org/articles/10.3389/fenrg.2023.1199397/fullLLC resonant converterresonant inductor voltagedriving strategysynchronous rectificationDC–DC converters |
| spellingShingle | Zuohao Luo Zuohao Luo Zaijun Wu Xiangjun Quan Xingfeng Xie Xingfeng Xie Xiaobo Dou Qinran Hu Synchronous rectification of LLC resonant converters based on resonant inductor voltage Frontiers in Energy Research LLC resonant converter resonant inductor voltage driving strategy synchronous rectification DC–DC converters |
| title | Synchronous rectification of LLC resonant converters based on resonant inductor voltage |
| title_full | Synchronous rectification of LLC resonant converters based on resonant inductor voltage |
| title_fullStr | Synchronous rectification of LLC resonant converters based on resonant inductor voltage |
| title_full_unstemmed | Synchronous rectification of LLC resonant converters based on resonant inductor voltage |
| title_short | Synchronous rectification of LLC resonant converters based on resonant inductor voltage |
| title_sort | synchronous rectification of llc resonant converters based on resonant inductor voltage |
| topic | LLC resonant converter resonant inductor voltage driving strategy synchronous rectification DC–DC converters |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1199397/full |
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