DC-AC Isolated Power Converter Array. Focus on Differential Mode Conducted EMI

Abstract

This paper introduces the implementation of a DC–AC step up isolated converter from associations of bidirectional Conversion Standard Cells (CSCs). The designed multi-cell converter is an array of standardized converter cells. It is described and then compared to a reference converter with respect to differential mode conducted electro-magnetic interference (EMI). The paper outlines the motivation for developing a generic multi-cell approach before underlining the benefits from the point of view of conducted EMI when implementing power converter arrays (PCAs). In particular, it is shown that in PCAs, the differential mode (DM) EMI filter can advantageously utilize distributed CSCs, making it possible to use very low value AC inductors to filter the AC current ripple. Experimental results are provided to validate the analysis carried out in the paper.

Modeling of a DAB under phase-shift modulation for design and DM input current filter optimization

“…A DAB converter, designed for low voltage and power applications [20], [21], [22] (10 V to 20 V and 100 W) presented in Fig. 8 (a), was used to conduct practical results with respect to power factor.…”

“…On it, it will be placed a rectangular region formed by the intervals [M o M f ] (y axe) and [γ o γ f ] (x axe) as presented in Fig 3 (a). The domain in which the output parametrized current will operate is directly related to the percentage of minimum output current allowed, as presented in (20). Therefore, from (16), the maximum value of γ o as a function of I o% is presented in (21).…”