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    High-Frequency Magnetics

    T07.4 - Asymmetric Magnetic Integration for Three-phase LLC with Improved Efficiency, Thermal, and Current Balancing

    Tuesday, March 24, 2026
    9:30 AM - 9:50 AM CT
    Location: 217C
    An asymmetric magnetic integration method is proposed for 3-phase LLC inductors and transformers, leveraging the decoupled electric and magnetic paths inherent to symmetric multiphase systems to optimize flux distribution. Compared with traditional symmetric integration, the proposed approach achieves 40% and 15% reductions in core loss for planar and volumetric magnetics, respectively, as validated by ANSYS, and exhibits improved current sharing according to SIMPLIS simulations. An 8-kW 3-phase LLC prototype with volumetric magnetics confirms consistently higher efficiency across all loads, with the peak efficiency improved by 0.1% to 98.5%, along with markedly reduced core thermal stress.