Tradeoffs of Centralized Versus Localized Filtering Solutions for AEA

All-electric aircraft (AEA) require an increased number of power converters, making it potentially more susceptible to electromagnetic interference (EMI). As aircraft rely on strict volume and weight limits, mitigation methods must be developed to minimize their impact on the overall bulkiness. The operation of a multi-converter distribution system supplied by a single dc power source is investigated in this paper. Filtering methods are typically implemented at each converter independently, however, a centralized approach is here investigated. Common and differential mode EMI levels are evaluated, resulting in the design of gamma-pi type EMI filters. The solutions are compared for centralized against localized filters, evaluating performance, variables influencing design decisions, and overall size optimization.