The concept of more electric aircraft (MEA) is based on the increasing use of electric power to replace the non-electric subsystems in the traditional aircraft. It provides significant improvements in reliability, maintenance cost, fuel consumption and overall weight for the aircraft. The LCL fi lter is widely used in the grid -connected inverter due to its harmonic attenuation performance and system stability. Compact and efficient magnetic components design in the power inverter results in its total size and weight minimization. Winding technology, switching frequency and core selection are three important issues in the size reduction of magnetic components in the LCL fi lter. Furthermore, besides power quality of the power grid, another important issue is the conducted EMI which is mainly generated due to the high frequency transistor switching and parasitic components in the noise conduction path. The differential mode (DM) EMI is dominant compared with the common mode (CM) EMI in the inverter side, thus the LCL fi lter can be treated as an EMI filter if the self -resonant frequency in the filtering inductor is high enough.
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