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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Five-Phase LLC Resonant DC#x002F;DC Converter Utilizing CLC Filter for Current Sharing
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Five-Phase LLC Resonant DC#x002F;DC Converter Utilizing CLC Filter for Current Sharing

机译：Five-Phase LLC Resonant DC#x002F;DC Converter Utilizing CLC Filter for Current Sharing

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摘要

Multiphase LLC resonant converters are extensively used in the high-power scenarios. Compared with the common three-phase LLC resonant converters, a five-phase LLC (FPLLC) resonant converter can operate at higher power density with reduced current ripple, yet the current imbalance issue induced by the passive component tolerance is aggregated. In this article, the FPLLC converter topology is introduced. Via the current phasor diagram and time-domain analysis of resonant current with large component tolerance, an analytical model for unbalanced currents of the worst case is deduced. In addition, a current sharing method utilizing CLC output filter is proposed. The high-impedance commutation path introduced by the LC parallel resonance tank of CLC filter can suppress the unbalanced current. Combining with the derived unbalanced current in the worst case, the design process of the CLC filter is presented in details. Both the analytical model of resonant current in the worst case and the current sharing functionality of the proposed CLC filter are validated with simulation and experimental study.

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