An Improved IPOS LLC Resonant Converter With Sub-Module Output Voltage Sharing in Low Ripple High-Voltage Applications
This paper proposed an input-parallel and output-series (IPOS) LLC resonant converter for applications with high voltage gain and low ripple, which considers the sharing of submodule output voltages. The resonant converter proposed has an integrated magnetics, which improves the utilization of the c...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2023-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10273998/ |
| _version_ | 1827308185127485440 |
|---|---|
| author | Zhijian Liu Wenguang Chen Li Peng Liang Zheng Shuang Wen |
| author_facet | Zhijian Liu Wenguang Chen Li Peng Liang Zheng Shuang Wen |
| author_sort | Zhijian Liu |
| collection | DOAJ |
| description | This paper proposed an input-parallel and output-series (IPOS) LLC resonant converter for applications with high voltage gain and low ripple, which considers the sharing of submodule output voltages. The resonant converter proposed has an integrated magnetics, which improves the utilization of the core. The reason is because magnetic fluxes can be superimposed or cancelled each other when the resonant currents are interleaved. Moreover, the influence of parameter mismatch in the resonant tank on voltage and current sharing in IPOS-LLC was analyzed based on the passive impedance theory. The results show that, by selecting smaller quality factors and using N-connections in high-voltage applications, the sharing of output voltage among modules can be well reflected, despite tolerances of the resonance parameters. Meanwhile, the voltage stress distribution of the rectifier diodes in each submodule is optimized, which improves the reliability of the circuit. By using the aforementioned conclusions, a prototype with 90 kHz, 40 V/4.8 kV, and 1.15 kW is established. The measured output voltage mismatch of 3.1% and voltage ripple rate of 0.16% at 3.7 nF output capacitance proves the effectiveness and correctness of the proposed resonant converter design. |
| first_indexed | 2024-03-11T15:51:07Z |
| format | Article |
| id | doaj.art-92d877296d4a4186b87d48998b445bbd |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-24T18:53:00Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-92d877296d4a4186b87d48998b445bbd2024-03-26T17:47:42ZengIEEEIEEE Access2169-35362023-01-011111531611532910.1109/ACCESS.2023.332293710273998An Improved IPOS LLC Resonant Converter With Sub-Module Output Voltage Sharing in Low Ripple High-Voltage ApplicationsZhijian Liu0https://orcid.org/0000-0001-5732-8689Wenguang Chen1https://orcid.org/0000-0003-2128-640XLi Peng2https://orcid.org/0009-0009-7928-116XLiang Zheng3https://orcid.org/0009-0008-8399-4173Shuang Wen4https://orcid.org/0009-0004-5684-2087School of Electrical Engineering, University of South China, Hengyang, ChinaSchool of Electrical Engineering, University of South China, Hengyang, ChinaSchool of Electrical Engineering, University of South China, Hengyang, ChinaSchool of Electrical Engineering, University of South China, Hengyang, ChinaSchool of Electrical Engineering, University of South China, Hengyang, ChinaThis paper proposed an input-parallel and output-series (IPOS) LLC resonant converter for applications with high voltage gain and low ripple, which considers the sharing of submodule output voltages. The resonant converter proposed has an integrated magnetics, which improves the utilization of the core. The reason is because magnetic fluxes can be superimposed or cancelled each other when the resonant currents are interleaved. Moreover, the influence of parameter mismatch in the resonant tank on voltage and current sharing in IPOS-LLC was analyzed based on the passive impedance theory. The results show that, by selecting smaller quality factors and using N-connections in high-voltage applications, the sharing of output voltage among modules can be well reflected, despite tolerances of the resonance parameters. Meanwhile, the voltage stress distribution of the rectifier diodes in each submodule is optimized, which improves the reliability of the circuit. By using the aforementioned conclusions, a prototype with 90 kHz, 40 V/4.8 kV, and 1.15 kW is established. The measured output voltage mismatch of 3.1% and voltage ripple rate of 0.16% at 3.7 nF output capacitance proves the effectiveness and correctness of the proposed resonant converter design.https://ieeexplore.ieee.org/document/10273998/High-voltagevoltage sharingmagnetic integrationresonant converter |
| spellingShingle | Zhijian Liu Wenguang Chen Li Peng Liang Zheng Shuang Wen An Improved IPOS LLC Resonant Converter With Sub-Module Output Voltage Sharing in Low Ripple High-Voltage Applications IEEE Access High-voltage voltage sharing magnetic integration resonant converter |
| title | An Improved IPOS LLC Resonant Converter With Sub-Module Output Voltage Sharing in Low Ripple High-Voltage Applications |
| title_full | An Improved IPOS LLC Resonant Converter With Sub-Module Output Voltage Sharing in Low Ripple High-Voltage Applications |
| title_fullStr | An Improved IPOS LLC Resonant Converter With Sub-Module Output Voltage Sharing in Low Ripple High-Voltage Applications |
| title_full_unstemmed | An Improved IPOS LLC Resonant Converter With Sub-Module Output Voltage Sharing in Low Ripple High-Voltage Applications |
| title_short | An Improved IPOS LLC Resonant Converter With Sub-Module Output Voltage Sharing in Low Ripple High-Voltage Applications |
| title_sort | improved ipos llc resonant converter with sub module output voltage sharing in low ripple high voltage applications |
| topic | High-voltage voltage sharing magnetic integration resonant converter |
| url | https://ieeexplore.ieee.org/document/10273998/ |
| work_keys_str_mv | AT zhijianliu animprovediposllcresonantconverterwithsubmoduleoutputvoltagesharinginlowripplehighvoltageapplications AT wenguangchen animprovediposllcresonantconverterwithsubmoduleoutputvoltagesharinginlowripplehighvoltageapplications AT lipeng animprovediposllcresonantconverterwithsubmoduleoutputvoltagesharinginlowripplehighvoltageapplications AT liangzheng animprovediposllcresonantconverterwithsubmoduleoutputvoltagesharinginlowripplehighvoltageapplications AT shuangwen animprovediposllcresonantconverterwithsubmoduleoutputvoltagesharinginlowripplehighvoltageapplications AT zhijianliu improvediposllcresonantconverterwithsubmoduleoutputvoltagesharinginlowripplehighvoltageapplications AT wenguangchen improvediposllcresonantconverterwithsubmoduleoutputvoltagesharinginlowripplehighvoltageapplications AT lipeng improvediposllcresonantconverterwithsubmoduleoutputvoltagesharinginlowripplehighvoltageapplications AT liangzheng improvediposllcresonantconverterwithsubmoduleoutputvoltagesharinginlowripplehighvoltageapplications AT shuangwen improvediposllcresonantconverterwithsubmoduleoutputvoltagesharinginlowripplehighvoltageapplications |