T26.5 - EMI Modeling of PCB-Based Three-Level Active Neutral-Point-Clamped GaN Converter

This paper highlights the importance, and challenges of the Gallium Nitride (GaN)-based three-level Active NPC (3L-ANPC) converter in addressing cross-mode coupling behavior. With their high switching frequency capability, GaN-based converter design brings compactness and enables PCB based higher power converter designs. PCB-based converter designs allow for predictability and consistency of performance as well as modular scalability in power. However, it also raises concerns on Electromagnetic Interreferences (EMI). This work investigates the EMI emission of a high frequency, high-power, PCB-based converter by introducing an analytical approach to model the Common Mode Equivalent Circuit (CMEC). A new method is introduced to efficiently model and then optimize EMI radiation in ANPC inverters. Additionally, the paper describes the calculation of parasitic capacitances, ultimately enhancing system performance and reliability. Modeling results are presented to evaluate the proposed CMEC extracted model by comparing the emission with the results from a simulated Mixed Mode (MM) model.