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    Magnetics Modeling and Simulations

    D22.6 - Universal SPICE Modeling of Magnetic Components Applying Vector Fitting Algorithms and State-Space Modeling

    Thursday, March 26, 2026
    12:00 PM - 1:45 PM CT
    Location: Poster 11
    Accurate modeling of magnetic components is critical for the design of reliable and efficient power converters. While SPICE is widely used for simulating such systems, it often lacks component-specific models. This paper presents a methodology for generating state-space models of magnetic components using Vector Fitting and applying them to SPICE models of the components. Starting from frequencydomain impedance data—obtained from simulations or experimental measurements—the method fits system poles and residues through an iterative process to create rational approximations of the component’s behavior. The main contribution of this paper is the translation of the state-space equations into SPICE netlists through a circuit-level implementation of the differential equations. The process enables accurate behavioral modeling of custom magnetics and can be applied to multi-port components. A planar transformer is modeled, and the FEM results are compared with those obtained after the VF algorithm and the experimental measurements.