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    Single and Multi-Phase Inverters

    D12.9 - Analytical Modeling of Common-Mode and Differential-Mode Voltage Spectra for a Two-Level, Three-Phase Inverter

    Thursday, March 26, 2026
    12:00 PM - 1:45 PM CT
    Location: Poster 1
    This work presents an analytical framework for predicting CM and DM voltage spectra in two-level, three-phase WBG inverters. By combining inverter controls, PWM duty cycles, switching sequences, and measured parasitic parameters, the method accurately reconstructs LISN-observed conducted EMI without relying on hardware measurements. DM modeling accounts for complementary switching, cross-coupling, and DC-link ripple, while a refined S-shaped trapezoidal waveform captures CM voltage dv/dt effects and asymmetries. Equivalent circuit models for CM and DM paths enable high-frequency spectral prediction, supporting filter design. Validation against a Wolfspeed CRD300DA12E-XM3 inverter demonstrates strong agreement with measured spectra. The approach enables early-stage EMI filter synthesis and virtual prototyping, reducing development time and reliance on iterative hardware testing.