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Three-Phase LLC Resonant Converter based on Matrix Transformer

, Baoge ZHANG, Li MA, , Shaoning LI, · Electrotehnica, Electronica, Automatica · 2025

In view of the new energy vehicles on the market superfast charging system and for the subsequent automotive components to provide reliable voltage conversion function, puts forward a high stability, high density, high power based on matrix transformer three-phase LLC resonance converter, due to the parallel resonance parameters (resonance inductance, capacitor, excitation inductance), the transformation of each phase resonance cavity different, leading to the phase resonance current and rectifier current imbalance. Therefore, on the basis of the three-phase LLC resonance converter, the method of original edge series and auxiliary edge parallel to add multiple groups of transformers to each phase. On the basis of not adding any additional circuit, the automatic flow sharing capacity of the resonance converter is improved, and the anti-interference ability and stability of the resonance converter are enhanced. Compared with the traditional LLC resonant converter, the converter can effectively reduce the ripple of output voltage, reduce the damage to subsequent components, and realize the ZVS of the original primary side switch tube and the secondary side diode, reducing the loss of

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