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Research on Interleaved Three-switch Buck-Boost Circuit with Co-directional Coupling Inductor on Boost Side
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Xianjin ZHANG1, Xiaoqian ZHANG1, Di WU2
Journal of Power Supply | 2024, 22(2) : 47 - 54
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Journal of Power Supply | 2024, 22(2): 47-54
• DC-DC Converters •
Research on Interleaved Three-switch Buck-Boost Circuit with Co-directional Coupling Inductor on Boost Side
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Xianjin ZHANG1, Xiaoqian ZHANG1, Di WU2
Affiliations
  • 1 School of Energy and Power Engineering Nantong Institute of Technology Nantong 226002 China
  • 2 School of Electronic Engineering Jiangsu Ocean University Lianyungang 222005 China
Published: 2024-03-30 doi: 10.13234/j.issn.2095-2805.2024.2.47
Outline
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The two-switch Buck-Boost converter has been widely applied in step-up and step-down scenarios. However, it usually operates under hard switching conditions in the existing various control and modulation modes. In addition, its interleaved control circuit is usually complicated. A three-switch interleaved Buck-Boost circuit with co-directional coupling inductor and its control method are given based on the characteristics of co-directional coupling inductor. First, the coupling process of the coupling inductor during the switching process is analyzed under a large coupling coefficient, based on which the circuit's fundamental operating principle is given in detail. Then, it is concluded that the extended duty cycle and soft switching of Boost-side power switches can be achieved in the discontinuous self-induction current mode, so as to avoid the synchronous and current-sharing circuits in the two-phase interleaved control circuit, thus obviously simplifying the control circuit. Finally, simulation and experimental results verified the analysis results.

Buck-Boost  /  co-directional coupling inductor  /  soft switching  /  extended duty cycle
Xianjin ZHANG, Xiaoqian ZHANG, Di WU. Research on Interleaved Three-switch Buck-Boost Circuit with Co-directional Coupling Inductor on Boost Side[J]. Journal of Power Supply, 2024 , 22 (2) : 47 -54 . DOI: 10.13234/j.issn.2095-2805.2024.2.47
Funding
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  • National Natural Science Foundation of China(51707078)
  • Science and Technology Foundation of Nantong Institute of Technology(ZX202110)
Appendix
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Year 2024 volume 22 Issue 2
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.2.47
  • Receive Date：2021-10-12
  • Online Date：2025-07-21
  • Published：2024-03-30
Article Data
Affiliations
History
  • Received：2021-10-12
  • Revised：2021-12-09
  • Accepted：2021-12-20
Funding
National Natural Science Foundation of China(51707078)
Science and Technology Foundation of Nantong Institute of Technology(ZX202110)
Affiliations
    1 School of Energy and Power Engineering Nantong Institute of Technology Nantong 226002 China
    2 School of Electronic Engineering Jiangsu Ocean University Lianyungang 222005 China
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