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Improved LLC Topology with High Fault Tolerance Capability and Its Control Strategy
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Qinghua CHEN, Ke WU, Ronglu QIU, Hanyu WANG, Mingyao MA
Journal of Power Supply | 2024, 22(3) : 165 - 171
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Journal of Power Supply | 2024, 22(3): 165-171
Gate Driving and Application
Improved LLC Topology with High Fault Tolerance Capability and Its Control Strategy
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Qinghua CHEN, Ke WU, Ronglu QIU, Hanyu WANG, Mingyao MA
Affiliations
  • School of Electrical Engineering and Automation Hefei University of Technology Hefei 230009 China
Published: 2024-05-30 doi: 10.13234/j.issn.2095-2805.2024.3.165
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LLC resonant converters are widely applied in on-board power supplies owing to their high power density, high efficiency and small size, and their reliability is critical to the driving safety and passenger experiences. However, the complicated working conditions and harsh environment under which vehicles operate have become a huge challenge to power devices. When a switch failure occurs, the resonant converter cannot maintain a stable output voltage while operating at a resonant point, and both efficiency and output capability of the system will decrease substantially. To make the converter more compatible with fault occasions, an improved LLC topology and its control strategy are proposed in this paper, which can ensure that the output voltage remains unaffected when a switch failure occurs and the converter operates near the resonant frequency. Additionally, an optimized Burst control strategy is designed to suppress the overvoltage of the resonant capacitor during the fault tolerance transition and guarantee a smooth fault tolerance process. Finally, simulation and experimental results verified the effectiveness of the proposed method.

On-board converter  /  LLC resonant converter  /  fault tolerance  /  reliability
Qinghua CHEN, Ke WU, Ronglu QIU, Hanyu WANG, Mingyao MA. Improved LLC Topology with High Fault Tolerance Capability and Its Control Strategy[J]. Journal of Power Supply, 2024 , 22 (3) : 165 -171 . DOI: 10.13234/j.issn.2095-2805.2024.3.165
Year 2024 volume 22 Issue 3
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.3.165
  • Receive Date:2024-01-31
  • Online Date:2025-07-21
  • Published:2024-05-30
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  • Received:2024-01-31
  • Revised:2024-02-25
  • Accepted:2024-02-28
Affiliations
    School of Electrical Engineering and Automation Hefei University of Technology Hefei 230009 China
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表12种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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