Investigation on the optimal operation and control strategy of a wide‐range switched‐capacitor/switched‐inductor DC/DC converter
Abstract Wide‐range DC/DC converters are widely used in telecommunications, electric vehicles, and e‐bikes. In this paper, the operation characteristics of the wide‐range cascaded buck converter with two duty cycles are investigated. The operation principle of switched‐capacitor and switched‐inducto...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-02-01
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| Series: | IET Power Electronics |
| Online Access: | https://doi.org/10.1049/pel2.12378 |
| _version_ | 1797943661474873344 |
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| author | Jingjing Qi Xuezhi Wu Shan He Wenzheng Xu Jingdou Liu |
| author_facet | Jingjing Qi Xuezhi Wu Shan He Wenzheng Xu Jingdou Liu |
| author_sort | Jingjing Qi |
| collection | DOAJ |
| description | Abstract Wide‐range DC/DC converters are widely used in telecommunications, electric vehicles, and e‐bikes. In this paper, the operation characteristics of the wide‐range cascaded buck converter with two duty cycles are investigated. The operation principle of switched‐capacitor and switched‐inductor is analyzed to ensure that there are no current or voltage spikes in the system and no additional control is required for them. Based on the volume and efficiency performance indexes, the optimal operating region of the converter should be selected to the left side of the minimum sum point of the two duty cycles. The small signal model of the converter is established, then a control strategy is proposed that the first‐stage duty cycle is directly given based on the optimal operating region, and the second‐stage duty cycle is determined by double closed‐loop control, which has good control performance, economy, and simplicity. The prototype achieved the conversion of 32 to80 V to 5 V/6 A with peak efficiencies of 92.4%/80 V, 93.8%/48 V, 94.5%/32 V. The results proved that the control strategy enables the converter to realize high efficiency and rapid dynamic regulation even in the condition of high voltage gain and wide input range. |
| first_indexed | 2024-04-10T20:26:38Z |
| format | Article |
| id | doaj.art-a43353048a2545d4a523b36669836861 |
| institution | Directory Open Access Journal |
| issn | 1755-4535 1755-4543 |
| language | English |
| last_indexed | 2024-04-10T20:26:38Z |
| publishDate | 2023-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Power Electronics |
| spelling | doaj.art-a43353048a2545d4a523b366698368612023-01-25T08:53:52ZengWileyIET Power Electronics1755-45351755-45432023-02-0116222724210.1049/pel2.12378Investigation on the optimal operation and control strategy of a wide‐range switched‐capacitor/switched‐inductor DC/DC converterJingjing Qi0Xuezhi Wu1Shan He2Wenzheng Xu3Jingdou Liu4National Research Center for Active Distribution Network Technology Beijing Jiaotong University Beijing ChinaNational Research Center for Active Distribution Network Technology Beijing Jiaotong University Beijing ChinaShenzhen Power Supply Bureau Co., Ltd Shenzhen ChinaNational Research Center for Active Distribution Network Technology Beijing Jiaotong University Beijing ChinaNational Research Center for Active Distribution Network Technology Beijing Jiaotong University Beijing ChinaAbstract Wide‐range DC/DC converters are widely used in telecommunications, electric vehicles, and e‐bikes. In this paper, the operation characteristics of the wide‐range cascaded buck converter with two duty cycles are investigated. The operation principle of switched‐capacitor and switched‐inductor is analyzed to ensure that there are no current or voltage spikes in the system and no additional control is required for them. Based on the volume and efficiency performance indexes, the optimal operating region of the converter should be selected to the left side of the minimum sum point of the two duty cycles. The small signal model of the converter is established, then a control strategy is proposed that the first‐stage duty cycle is directly given based on the optimal operating region, and the second‐stage duty cycle is determined by double closed‐loop control, which has good control performance, economy, and simplicity. The prototype achieved the conversion of 32 to80 V to 5 V/6 A with peak efficiencies of 92.4%/80 V, 93.8%/48 V, 94.5%/32 V. The results proved that the control strategy enables the converter to realize high efficiency and rapid dynamic regulation even in the condition of high voltage gain and wide input range.https://doi.org/10.1049/pel2.12378 |
| spellingShingle | Jingjing Qi Xuezhi Wu Shan He Wenzheng Xu Jingdou Liu Investigation on the optimal operation and control strategy of a wide‐range switched‐capacitor/switched‐inductor DC/DC converter IET Power Electronics |
| title | Investigation on the optimal operation and control strategy of a wide‐range switched‐capacitor/switched‐inductor DC/DC converter |
| title_full | Investigation on the optimal operation and control strategy of a wide‐range switched‐capacitor/switched‐inductor DC/DC converter |
| title_fullStr | Investigation on the optimal operation and control strategy of a wide‐range switched‐capacitor/switched‐inductor DC/DC converter |
| title_full_unstemmed | Investigation on the optimal operation and control strategy of a wide‐range switched‐capacitor/switched‐inductor DC/DC converter |
| title_short | Investigation on the optimal operation and control strategy of a wide‐range switched‐capacitor/switched‐inductor DC/DC converter |
| title_sort | investigation on the optimal operation and control strategy of a wide range switched capacitor switched inductor dc dc converter |
| url | https://doi.org/10.1049/pel2.12378 |
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