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- W4360584295 abstract "<italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>CLLC</i> resonant converters are an attractive option for battery charging applications due to their bidirectional power flow and high efficiency. Pulse frequency modulation (PFM) is the simple method to drive <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>CLLC</i> converters. However, PFM cannot regulate the output voltage under the light-load condition properly, which leads to high switching and core losses. Phase-shift modulation techniques, such as dual-phase-shift (DPS) modulation, can overcome this challenge. However, more improvements are demanded due to high circulating currents in phase-shift modulations. In this article, an improved modulation technique based on triple phase shift (TPS) has been applied in <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>CLLC</i> converters to improve the light-load efficiency. TPS modulation like any other phase-shift modulation keeps the switching frequency of <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>CLLC</i> converters fixed at the resonant frequency under the light-load condition and regulates the output voltage by its three phase-shift parameters. The improved TPS modulation has lower circulating current at the same average output current compared to DPS modulation. Therefore, higher efficiency, smaller peak, and RMS current values can be achieved under the light-load condition. In addition, the proposed TPS modulation has a better flexibility in regulating the output voltage under the light-load condition due to an extra phase-shift parameter compared to DPS modulation. The proposed TPS modulation has been analyzed thoroughly in this article, and a proper selection of phase-shift values has been explained to improve the efficiency of the converter. Finally, advantages of the improved TPS modulation have been validated by simulation and a 1-kW experimental setup." @default.
- W4360584295 created "2023-03-24" @default.
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- W4360584295 date "2023-06-01" @default.
- W4360584295 modified "2023-10-13" @default.
- W4360584295 title "Improved Triple-Phase-Shift Modulation for Bidirectional <i>CLLC</i> Converters" @default.
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- W4360584295 doi "https://doi.org/10.1109/tpel.2023.3256968" @default.
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