EMI Filter Design for High-Speed Inverter Drives in All-Electric Aircraft

This paper presents an integrated approach to EMI filter design for high-speed inverter drives in All Electric Aircraft (AEA) applications. Where traditional Electromagnetic Interference (EMI) filter design methodologies primarily focus on Conducted Emission (CE), this study incorporates lightning and inrush current requirements from DO-160G/ED-14G standards. Thus the performance is evaluated in time and frequency domain. This impacts the overall EMI filter design. Two filters were designed and analyzed: one following only CE design, the other incorporating lightning and inrush. Both were evaluated through simulation, showing comparable Insertion Loss (IL). However, the proposed design demonstrated a better transient mitigation due to a higher impedance input stage. Integrating lightning and inrush current effects early in the filter design process can lead to more compact solutions for aerospace applications, compared to traditional methods that consider those on the system level.