Common-Mode EMI Reduction Control Strategy for Interleaved Converters

Abstract

Isolated dc/dc converters have been adopted in numerous applications because of their advantages in efficiency, reliability, total cost, and electrical isolation. Interleaving converters can achieve the aforementioned criteria while lowering differential-mode (DM) noise and therefore filter weight and volume, which are limiting factors in all-electric aircraft (AEA). The switching of the converters, on the other hand, produces common-mode (CM) noise. As a result, the emphasis of this letter is on the impact of interleaving forward converters on possible CM noise reduction via pulse alignment. This letter discusses theory as well as potential practical limits. The data revealed that the rise and fall duration and the number of interleaved converters have an influence on CM noise reduction. To demonstrate the concept of this interleaving method, simulation results and experimental setups are used.