DM EMI Noise Prediction for BCM based Single-Phase Grid-Connected Inverter

Boundary conduction mode (BCM) current control is an emerging soft-switching technique in single-phase grid-connected inverters. However, the significant ripple in inductor current leads to heightened electromagnetic interference (EMI) noise in form of differential mode (DM) noise. This paper proposes an analytical model to predict the differential mode EMI noise for BCM based single-phase grid-connected inverter, which can facilitate the design of the EMI filter without repetitive measurements. Experimental validation is conducted on a 500 W hardware prototype to affirm the feasibility and efficacy of the proposed model.