Optimization of <italic>LLC</italic> Resonant Converter With Two Degrees of Freedom Based on Operation Stage Trajectory Analysis
<italic>LLC</italic> resonant DC-DC converter has been widely used in high power density and high efficiency applications. Pulse frequency modulation (PFM) is commonly applied due to its wide soft-switching range. In some special cases, phase shift modulation (PSM) is applied to widen vo...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2021-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9439536/ |
| _version_ | 1818643206585188352 |
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| author | Ziheng Xiao Zhixing He Yong Ning Hongliang Wang An Luo Yandong Chen Junling Chen |
| author_facet | Ziheng Xiao Zhixing He Yong Ning Hongliang Wang An Luo Yandong Chen Junling Chen |
| author_sort | Ziheng Xiao |
| collection | DOAJ |
| description | <italic>LLC</italic> resonant DC-DC converter has been widely used in high power density and high efficiency applications. Pulse frequency modulation (PFM) is commonly applied due to its wide soft-switching range. In some special cases, phase shift modulation (PSM) is applied to widen voltage regulation range, improve light-load efficiency, or implement a soft start-up process. Because <italic>LLC</italic> is with 2 control degrees of freedom (2DOFs), switching frequency and duty ratio, a unified analysis and optimization for <italic>LLC</italic> with 2DOFs is desired. This paper makes an effort to present a unified time domain operation stage trajectories (OSTs) analysis of <italic>LLC</italic>. On this basis, a unified numerical optimization method is proposed with arbitrarily designed optimization objectives. With the proposed optimization method, the optimized <italic>LLC</italic> with 2DOFs is with better performance compared to conventional PFM and PSM, which is verified by the experimental results. |
| first_indexed | 2024-12-16T23:55:16Z |
| format | Article |
| id | doaj.art-132e765a6d21408884151242fee17312 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-16T23:55:16Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-132e765a6d21408884151242fee173122022-12-21T22:11:13ZengIEEEIEEE Access2169-35362021-01-019796297964210.1109/ACCESS.2021.30831009439536Optimization of <italic>LLC</italic> Resonant Converter With Two Degrees of Freedom Based on Operation Stage Trajectory AnalysisZiheng Xiao0https://orcid.org/0000-0002-4144-3532Zhixing He1https://orcid.org/0000-0003-4354-2611Yong Ning2Hongliang Wang3https://orcid.org/0000-0001-6698-6923An Luo4Yandong Chen5https://orcid.org/0000-0001-7604-7516Junling Chen6Guangdong Zhicheng Champion Group Company Ltd., Dongguan, ChinaGuangdong Zhicheng Champion Group Company Ltd., Dongguan, ChinaCollege of Electrical and Information Engineering, Hunan University, Changsha, ChinaGuangdong Zhicheng Champion Group Company Ltd., Dongguan, ChinaGuangdong Zhicheng Champion Group Company Ltd., Dongguan, ChinaGuangdong Zhicheng Champion Group Company Ltd., Dongguan, ChinaCollege of Electrical and Information Engineering, Hunan University, Changsha, China<italic>LLC</italic> resonant DC-DC converter has been widely used in high power density and high efficiency applications. Pulse frequency modulation (PFM) is commonly applied due to its wide soft-switching range. In some special cases, phase shift modulation (PSM) is applied to widen voltage regulation range, improve light-load efficiency, or implement a soft start-up process. Because <italic>LLC</italic> is with 2 control degrees of freedom (2DOFs), switching frequency and duty ratio, a unified analysis and optimization for <italic>LLC</italic> with 2DOFs is desired. This paper makes an effort to present a unified time domain operation stage trajectories (OSTs) analysis of <italic>LLC</italic>. On this basis, a unified numerical optimization method is proposed with arbitrarily designed optimization objectives. With the proposed optimization method, the optimized <italic>LLC</italic> with 2DOFs is with better performance compared to conventional PFM and PSM, which is verified by the experimental results.https://ieeexplore.ieee.org/document/9439536/LLC resonant convertersoft-switchingoperation stage trajectory analysisoptimization |
| spellingShingle | Ziheng Xiao Zhixing He Yong Ning Hongliang Wang An Luo Yandong Chen Junling Chen Optimization of <italic>LLC</italic> Resonant Converter With Two Degrees of Freedom Based on Operation Stage Trajectory Analysis IEEE Access LLC resonant converter soft-switching operation stage trajectory analysis optimization |
| title | Optimization of <italic>LLC</italic> Resonant Converter With Two Degrees of Freedom Based on Operation Stage Trajectory Analysis |
| title_full | Optimization of <italic>LLC</italic> Resonant Converter With Two Degrees of Freedom Based on Operation Stage Trajectory Analysis |
| title_fullStr | Optimization of <italic>LLC</italic> Resonant Converter With Two Degrees of Freedom Based on Operation Stage Trajectory Analysis |
| title_full_unstemmed | Optimization of <italic>LLC</italic> Resonant Converter With Two Degrees of Freedom Based on Operation Stage Trajectory Analysis |
| title_short | Optimization of <italic>LLC</italic> Resonant Converter With Two Degrees of Freedom Based on Operation Stage Trajectory Analysis |
| title_sort | optimization of italic llc italic resonant converter with two degrees of freedom based on operation stage trajectory analysis |
| topic | LLC resonant converter soft-switching operation stage trajectory analysis optimization |
| url | https://ieeexplore.ieee.org/document/9439536/ |
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