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Research on the Frequency Jitter Control Method Applied to Bidirectional LLC Converter in Single-phase Hybrid Inverter
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Jingwen CHEN1, Hengheng ZHANG  Student Member, CPSS1, Qi ZHANG  Member, CPSS2
Journal of Power Supply | 2026, 24(9) : 53 - 64
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Journal of Power Supply | 2026, 24(9): 53-64
• Power Converter Modeling and Control •
Research on the Frequency Jitter Control Method Applied to Bidirectional LLC Converter in Single-phase Hybrid Inverter
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Jingwen CHEN1, Hengheng ZHANG  Student Member, CPSS1, Qi ZHANG  Member, CPSS2
Affiliations
  • 1.School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
  • 2.School of Electrical Engineering, Xi’an University of Technology, Xi’an 710048, China
Published: 2026-09-30 doi: 10.13234/j.issn.2095-2805.2026.9.53
Outline
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Frequency jitter technology is commonly used to mitigate electromagnetic compatibility issues in LLC converters. However, the traditional frequency jitter technology has certain limitations in the processing of load characteristics when adapting to frequency changes, which leads to the reduction of the working efficiency of LLC converters, especially in single-phase hybrid inverters, where the fixed frequency disturbance makes the above problems more significant. In view of this situation, a frequency jitter control method based on the load power characteristics is proposed, which aims to improve the efficiency of LLC converters, and the key is to achieve the matching of “source impedance” and “load impedance”. First, the characteristics of “source” and “load” in single-phase hybrid inverter are analyzed, and the characteristics of “source impedance” and “load impedance” are deeply explored. Then, combining with the impedance characteristics of LLC converter at different frequencies, this frequency jitter control method based on load power characteristics is proposed. Finally, the effectiveness of the proposed method is verified by experiments. Experimental results show that the proposed method can effectively improve the working efficiency of LLC converter.

Single-phase hybrid inverter  /  bidirectional LLC converter  /  impedance matching  /  frequency jitter
陈景文, 张横横中国电源学会学生会员, 张琦中国电源学会会员. 应用于单相混合逆变器中双向LLC变换器的抖频控制方法研究. 电源学报, 2026 , 24 (9) : 53 -64 . DOI: 10.13234/j.issn.2095-2805.2026.9.53
Jingwen CHEN, Hengheng ZHANG, Qi ZHANG. Research on the Frequency Jitter Control Method Applied to Bidirectional LLC Converter in Single-phase Hybrid Inverter[J]. Journal of Power Supply, 2026 , 24 (9) : 53 -64 . DOI: 10.13234/j.issn.2095-2805.2026.9.53
Funding
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  • Shaanxi Provincial Department of Education Planned Project(22JC023)
  • Xi’an Science and Technology Plan Project(2024JH-GXFW-0180)
Appendix
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Year 2026 volume 24 Issue 9
46
6
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.9.53
  • Receive Date：2024-12-05
  • Online Date：2026-10-29
  • Published：2026-09-30
Article Data
Affiliations
History
  • Received：2024-12-05
  • Revised：2025-02-13
  • Accepted：2025-02-17
Funding
Shaanxi Provincial Department of Education Planned Project(22JC023)
Xi’an Science and Technology Plan Project(2024JH-GXFW-0180)
Affiliations
    1.School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
    2.School of Electrical Engineering, Xi’an University of Technology, Xi’an 710048, China
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