LCL filter design and experimental response analysis for a SiC inverter
S. Martín-Arroyo(1), A. Llamazares(1), J. Herrero Ciudad(2) and M. García-Gracia(1) 1. Department of Electrical Engineering EINA, Zaragoza University, Campus Río Ebro – Zaragoza (Spain) 2. For Optimal Renewable Energy Systems, S.L. – Polígono PLA-ZA, Zaragoza (Spain) 2026-01-20

Abstract

In this paper, an LCL filter for a 20-kW SiC powerinverter with a 25 kHz switching frequency is proposed and assessed. The transfer function without neglecting the network effect is considered. The optimal value of the damping resistor is evaluated to minimize losses while maintaining power quality and device stability. Finally, the harmonic content produced by the SiC inverter is experimentally measured to verify the effectiveness of the LCL filter.

Key words: LCL filter, SiC inverter, harmonic contents, transfer function.

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