Ultra-Fast GaN Power Modules for High-Density Electric-Vehicle Converters: A Simulated Switching, EMI, and Thermal Reliability Assessment

This empirical-style article presents a clearly labeled simulated study in Electronics and Communication Engineering. A simulated 800-V traction-inverter leg was modeled using silicon IGBT, silicon-carbide MOSFET, and gallium-nitride power-module scenarios. Switching frequency, gate resistance, parasitic inductance, junction temperature, voltage overshoot, common-mode current, and switching-energy loss were varied. The purpose was to quantify the efficiency-reliability trade-off of ultra-fast switching rather than reproduce a specific commercial module. The GaN scenario achieved the lowest simulated switching-energy loss and highest power-density index, but its advantage narrowed when package inductance exceeded 6 nH because overshoot and EMI increased sharply. A moderated gate-slew strategy reduced the modeled EMI index by 31% with only a 7% increase in switching loss. The numerical observations, assignments, and measured outcomes are synthetic and intended for methodological illustration only. No real industrial facility, enterprise network, laboratory, construction project, or manufactured component was used. The study demonstrates a realistic research framework aligned with current 2026 research directions while clearly separating simulated evidence from verified literature.