Multi-Channel Time Domain Measurement Setup for Multi-Output EMI Filter for All Electric Aircraft

The proper characterization of Electromagnetic Interference (EMI) filters is crucial for ensuring their effectiveness and suitability. Measurement procedures are described in several standards, allowing the assessment of Common Mode (CM) and Differential Mode (DM) insertion losses. Typically, as described in CISPR 17, three distinct setups are implemented. This leads to increased complexity, and time, especially with multi-output devices. This paper presents an optimized setup as an alternative to CISPR 17, in which both CM and DM ILs are measured for a multi-output EMI filter. The measurements present the interaction amongst all input- to-output combinations, as well as the effect of each parallel port. Finally, the load-to-Ioad combinations were also assessed and compared.