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Current-sharing Control Strategy for Input-series Output-parallel Combined System
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Lu QU, He LIU, Qiang TONG
Journal of Power Supply | 2025, 23(6) : 95 - 104
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Journal of Power Supply | 2025, 23(6): 95-104
• DC-DC Converters •
Current-sharing Control Strategy for Input-series Output-parallel Combined System
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Lu QU, He LIU, Qiang TONG
Affiliations
  • School of Intelligent Manufacturing and Equipment, Shenzhen Institute of Information Technology, Shenzhen 518000, China
Published: 2025-10-30 doi: 10.13234/j.issn.2095-2805.2025.6.95
Outline
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The input-series output-parallel combination technology for DC-DC converters is widely applied in high-power and high-voltage fields. To realize an average operation after the expansion and connection of modules, the characteristics of input voltage-sharing and output current-sharing after the series-parallel combination of module power supplies are studied, and a control strategy for module current-sharing on the output side is proposed, which consists of an output voltage loop and an output current-sharing loop. The common output voltage loop of all the modules samples the output voltage from the combined system for feedback regulation, while the output current-sharing loop of each module samples the output current from the module for average control. All the sampling and control chips under the proposed control strategy are on the low-voltage output side, which can eliminate an isolation unit and improve the system reliability. A half-bridge LLC resonant topology was selected as a sub-module to build a prototype, and results verified the effectiveness of the proposed output current-sharing control method.

Half-bridge LLC resonance converter  /  current-sharing control  /  input-series output-parallel  /  combined system
曲璐, 刘贺, 佟强. 输入串联输出并联组合系统的均流控制策略. 电源学报, 2025 , 23 (6) : 95 -104 . DOI: 10.13234/j.issn.2095-2805.2025.6.95
Lu QU, He LIU, Qiang TONG. Current-sharing Control Strategy for Input-series Output-parallel Combined System[J]. Journal of Power Supply, 2025 , 23 (6) : 95 -104 . DOI: 10.13234/j.issn.2095-2805.2025.6.95
Funding
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  • Guangdong Province Regional Joint Fund(2020A1515111136)
  • Basic Research Project of Shenzhen Science and Technology Plan(20200828191356001)
  • Shenzhen Institute of Information Technology School Project(SZIIT2021KJ002)
Appendix
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Year 2025 volume 23 Issue 6
72
12
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.6.95
  • Receive Date：2023-03-09
  • Online Date：2026-10-26
  • Published：2025-10-30
Article Data
Affiliations
History
  • Received：2023-03-09
  • Revised：2023-07-14
  • Accepted：2023-07-29
Funding
Guangdong Province Regional Joint Fund(2020A1515111136)
Basic Research Project of Shenzhen Science and Technology Plan(20200828191356001)
Shenzhen Institute of Information Technology School Project(SZIIT2021KJ002)
Affiliations
    School of Intelligent Manufacturing and Equipment, Shenzhen Institute of Information Technology, Shenzhen 518000, China
References
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小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
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