Design Considerations and Performance Investigation of a Five-Level Cascaded Multilevel LLC Boost DC–DC Converter
This work proposes a cascaded five-level resonant boost “DC-DC converter with variable frequency control that is aimed at achieving a wide load and input voltage variation, remarkable efficiency, and zero voltage switching (ZVS) to meet the strict demands of industry applications. The des...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10054031/ |
| _version_ | 1797838060772130816 |
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| author | Ali Bughneda Mohamed Salem Eklas Hossain Dahaman Ishak Natarajan Prabaharan |
| author_facet | Ali Bughneda Mohamed Salem Eklas Hossain Dahaman Ishak Natarajan Prabaharan |
| author_sort | Ali Bughneda |
| collection | DOAJ |
| description | This work proposes a cascaded five-level resonant boost “DC-DC converter with variable frequency control that is aimed at achieving a wide load and input voltage variation, remarkable efficiency, and zero voltage switching (ZVS) to meet the strict demands of industry applications. The design consideration of this converter was also discussed in detail to confirm the achievement of each feature of the multilevel and LLC resonant converter (RC) combination. The selection of the voltage gain was set to achieve an output voltage that is 5 times the input voltage; the operation frequency range” was selected within the range of <inline-formula> <tex-math notation="LaTeX">$67kHz135kHz$ </tex-math></inline-formula> to ensure achievement of ZVS and the ability to work close to resonant frequency to achieve the estimated efficiency. Furthermore, a full-bridge LLC resonant frequency with the same assumptions and parameters was simulated using MATLAB/Simulink features to provide clear comparison and vision of the resonant behavior with the proposed topology. It was noticed that the LLC circuit with a five-level inverter differs from its typical behavior with full-bridge inverters; the switching frequency is always lower than the resonance frequency regardless of the input and load conditions. Also, the adopted variable frequency control proved its fast dynamic response to any changes in the input and load conditions to maintain <inline-formula> <tex-math notation="LaTeX">$1000V$ </tex-math></inline-formula> output, and <inline-formula> <tex-math notation="LaTeX">$5kW$ </tex-math></inline-formula> with 96.7% efficiency at full load conditions. Experiments were performed to validate the theoretical and simulation results using a laboratory prototype of the proposed converter; selected results were presented in this article to demonstrate the efficiency and viability of the proposed converter. |
| first_indexed | 2024-04-09T15:34:46Z |
| format | Article |
| id | doaj.art-b5c78af740b74b508b281b7174249b92 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-09T15:34:46Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-b5c78af740b74b508b281b7174249b922023-04-27T23:00:49ZengIEEEIEEE Access2169-35362023-01-0111404414045610.1109/ACCESS.2023.324922910054031Design Considerations and Performance Investigation of a Five-Level Cascaded Multilevel LLC Boost DC–DC ConverterAli Bughneda0Mohamed Salem1https://orcid.org/0000-0003-2290-998XEklas Hossain2https://orcid.org/0000-0003-2332-8095Dahaman Ishak3https://orcid.org/0000-0001-9363-6339Natarajan Prabaharan4https://orcid.org/0000-0003-0686-5825School of Electrical and Electronic Engineering, Universiti Sains Malaysia (USM), Nibong Tebal, Penang, MalaysiaSchool of Electrical and Electronic Engineering, Universiti Sains Malaysia (USM), Nibong Tebal, Penang, MalaysiaDepartment of Electrical and Computer Engineering, Boise State University, Boise, ID, USASchool of Electrical and Electronic Engineering, Universiti Sains Malaysia (USM), Nibong Tebal, Penang, MalaysiaDepartment of EEE, SASTRA Deemed University, Thanjavur, Tamil Nadu, IndiaThis work proposes a cascaded five-level resonant boost “DC-DC converter with variable frequency control that is aimed at achieving a wide load and input voltage variation, remarkable efficiency, and zero voltage switching (ZVS) to meet the strict demands of industry applications. The design consideration of this converter was also discussed in detail to confirm the achievement of each feature of the multilevel and LLC resonant converter (RC) combination. The selection of the voltage gain was set to achieve an output voltage that is 5 times the input voltage; the operation frequency range” was selected within the range of <inline-formula> <tex-math notation="LaTeX">$67kHz135kHz$ </tex-math></inline-formula> to ensure achievement of ZVS and the ability to work close to resonant frequency to achieve the estimated efficiency. Furthermore, a full-bridge LLC resonant frequency with the same assumptions and parameters was simulated using MATLAB/Simulink features to provide clear comparison and vision of the resonant behavior with the proposed topology. It was noticed that the LLC circuit with a five-level inverter differs from its typical behavior with full-bridge inverters; the switching frequency is always lower than the resonance frequency regardless of the input and load conditions. Also, the adopted variable frequency control proved its fast dynamic response to any changes in the input and load conditions to maintain <inline-formula> <tex-math notation="LaTeX">$1000V$ </tex-math></inline-formula> output, and <inline-formula> <tex-math notation="LaTeX">$5kW$ </tex-math></inline-formula> with 96.7% efficiency at full load conditions. Experiments were performed to validate the theoretical and simulation results using a laboratory prototype of the proposed converter; selected results were presented in this article to demonstrate the efficiency and viability of the proposed converter.https://ieeexplore.ieee.org/document/10054031/DC-DC resonant convertersmultilevel invertersvoltage stresszero current switching (ZCS)LLC resonant converterzero voltage switching (ZVS) |
| spellingShingle | Ali Bughneda Mohamed Salem Eklas Hossain Dahaman Ishak Natarajan Prabaharan Design Considerations and Performance Investigation of a Five-Level Cascaded Multilevel LLC Boost DC–DC Converter IEEE Access DC-DC resonant converters multilevel inverters voltage stress zero current switching (ZCS) LLC resonant converter zero voltage switching (ZVS) |
| title | Design Considerations and Performance Investigation of a Five-Level Cascaded Multilevel LLC Boost DC–DC Converter |
| title_full | Design Considerations and Performance Investigation of a Five-Level Cascaded Multilevel LLC Boost DC–DC Converter |
| title_fullStr | Design Considerations and Performance Investigation of a Five-Level Cascaded Multilevel LLC Boost DC–DC Converter |
| title_full_unstemmed | Design Considerations and Performance Investigation of a Five-Level Cascaded Multilevel LLC Boost DC–DC Converter |
| title_short | Design Considerations and Performance Investigation of a Five-Level Cascaded Multilevel LLC Boost DC–DC Converter |
| title_sort | design considerations and performance investigation of a five level cascaded multilevel llc boost dc x2013 dc converter |
| topic | DC-DC resonant converters multilevel inverters voltage stress zero current switching (ZCS) LLC resonant converter zero voltage switching (ZVS) |
| url | https://ieeexplore.ieee.org/document/10054031/ |
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