A Bi-Lateral Energy Resonant Conversion (BERC) Technique for Improved Passive Utilization in Hybrid Switched-Capacitor Converters
Hybrid or resonant switched-capacitor (ReSC) based converters are enticing with their high performance in high- and fixed-ratio applications, due to their efficient utilization of both active semiconductors and passive components. In particular, the cascaded or two-stage topologies have shown promis...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Open Journal of Power Electronics |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9924617/ |
| _version_ | 1828335965635084288 |
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| author | Wen Chuen Liu Ting Ge Robert C. N. Pilawa-Podgurski |
| author_facet | Wen Chuen Liu Ting Ge Robert C. N. Pilawa-Podgurski |
| author_sort | Wen Chuen Liu |
| collection | DOAJ |
| description | Hybrid or resonant switched-capacitor (ReSC) based converters are enticing with their high performance in high- and fixed-ratio applications, due to their efficient utilization of both active semiconductors and passive components. In particular, the cascaded or two-stage topologies have shown promising device utilization with least components required for high conversion ratios. This paper presents a novel bi-lateral energy resonant conversion (BERC) technique, that further improves the passive utilization in two-stage topologies by merging voltage- and current-type hybrid SC converters, beneficial in achieving smaller form factor while maintaining high efficiency. The current-type hybrid SC topology, which relocates the output inductor to its input and enables energy process simplification between adjacent cascaded stages, is first introduced in this paper. A 48-to-12 V converter prototype employing the BERC technique is implemented, validated and demonstrated with a very compact size of 0.18 in<inline-formula><tex-math notation="LaTeX">$^{3}$</tex-math></inline-formula>, along with an excellent overall peak efficiency of 98.8% (including all gate driver losses) using a zero voltage switching scheme designed for BERC. The prototype is tested up to 60 A, thus achieving a power density of 3900 W/in<inline-formula><tex-math notation="LaTeX">$^{3}$</tex-math></inline-formula> with a full-load efficiency more than 98%. |
| first_indexed | 2024-04-13T21:54:12Z |
| format | Article |
| id | doaj.art-ef82d605212a41bb952c1775c65e47f1 |
| institution | Directory Open Access Journal |
| issn | 2644-1314 |
| language | English |
| last_indexed | 2024-04-13T21:54:12Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Power Electronics |
| spelling | doaj.art-ef82d605212a41bb952c1775c65e47f12022-12-22T02:28:20ZengIEEEIEEE Open Journal of Power Electronics2644-13142022-01-01377278610.1109/OJPEL.2022.32155399924617A Bi-Lateral Energy Resonant Conversion (BERC) Technique for Improved Passive Utilization in Hybrid Switched-Capacitor ConvertersWen Chuen Liu0https://orcid.org/0000-0003-3256-417XTing Ge1https://orcid.org/0000-0003-0044-8166Robert C. N. Pilawa-Podgurski2https://orcid.org/0000-0002-5360-5906Department of Electrical Engineering and Computer Science, University of California, Berkeley, CA, USADepartment of Electrical Engineering and Computer Science, University of California, Berkeley, CA, USADepartment of Electrical Engineering and Computer Science, University of California, Berkeley, CA, USAHybrid or resonant switched-capacitor (ReSC) based converters are enticing with their high performance in high- and fixed-ratio applications, due to their efficient utilization of both active semiconductors and passive components. In particular, the cascaded or two-stage topologies have shown promising device utilization with least components required for high conversion ratios. This paper presents a novel bi-lateral energy resonant conversion (BERC) technique, that further improves the passive utilization in two-stage topologies by merging voltage- and current-type hybrid SC converters, beneficial in achieving smaller form factor while maintaining high efficiency. The current-type hybrid SC topology, which relocates the output inductor to its input and enables energy process simplification between adjacent cascaded stages, is first introduced in this paper. A 48-to-12 V converter prototype employing the BERC technique is implemented, validated and demonstrated with a very compact size of 0.18 in<inline-formula><tex-math notation="LaTeX">$^{3}$</tex-math></inline-formula>, along with an excellent overall peak efficiency of 98.8% (including all gate driver losses) using a zero voltage switching scheme designed for BERC. The prototype is tested up to 60 A, thus achieving a power density of 3900 W/in<inline-formula><tex-math notation="LaTeX">$^{3}$</tex-math></inline-formula> with a full-load efficiency more than 98%.https://ieeexplore.ieee.org/document/9924617/Switched-capacitor (SC)hybridresonantinterleavingmerged inductorcascaded |
| spellingShingle | Wen Chuen Liu Ting Ge Robert C. N. Pilawa-Podgurski A Bi-Lateral Energy Resonant Conversion (BERC) Technique for Improved Passive Utilization in Hybrid Switched-Capacitor Converters IEEE Open Journal of Power Electronics Switched-capacitor (SC) hybrid resonant interleaving merged inductor cascaded |
| title | A Bi-Lateral Energy Resonant Conversion (BERC) Technique for Improved Passive Utilization in Hybrid Switched-Capacitor Converters |
| title_full | A Bi-Lateral Energy Resonant Conversion (BERC) Technique for Improved Passive Utilization in Hybrid Switched-Capacitor Converters |
| title_fullStr | A Bi-Lateral Energy Resonant Conversion (BERC) Technique for Improved Passive Utilization in Hybrid Switched-Capacitor Converters |
| title_full_unstemmed | A Bi-Lateral Energy Resonant Conversion (BERC) Technique for Improved Passive Utilization in Hybrid Switched-Capacitor Converters |
| title_short | A Bi-Lateral Energy Resonant Conversion (BERC) Technique for Improved Passive Utilization in Hybrid Switched-Capacitor Converters |
| title_sort | bi lateral energy resonant conversion berc technique for improved passive utilization in hybrid switched capacitor converters |
| topic | Switched-capacitor (SC) hybrid resonant interleaving merged inductor cascaded |
| url | https://ieeexplore.ieee.org/document/9924617/ |
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