This paper presents a theoretical treatment of common-mode (CM) and differential-mode (DM) interaction that is known to exist in switch-mode converter systems. This analysis demonstrates that one important metric for evaluating this interaction (displacement currents through the module baseplate) can be quantitatively predicted through theoretical analysis of two types of asymmetry in the converter system: that arising through topological-induced current imbalances between phase legs, and that arising through parasitic imbalances within the structure of the multi-chip power module (MCPM). The latter has not been given analytical treatment in the literature to date, and represents an important degree of freedom for suppressing module baseplate current, which is a known contributor to CM behavior, and is also known to be exacerbated in the case of wide band-gap (WBG) converters due to fast signal edge rates. In this work, two studies are performed to explore the sensitivity of the baseplate current magnitude to two MCPM design parameters, namely the baseplate capacitance imbalance ratio, and the total baseplate capacitance value. These studies demonstrate that the output of the presented theoretical treatment agrees to a high degree of fidelity with time-domain simulation results. In addition, these studies reveal the unexpected prospect of eliminating the baseplate current due to the opposing influence of the two types of asymmetries considered.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Common-mode/differential-mode interactions in asymmetric converter structures


    Contributors:


    Publication date :

    2017-08-01


    Size :

    1165828 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Digital-to-analog converter having common-mode isolation and differential output

    Hellwarth, G.A. / Boinodiris, S. | Tema Archive | 1973


    SWITCHING CONVERTER COMMON MODE TRANSIENT IMMUNITY

    XI YOUHAO | European Patent Office | 2025

    Free access

    Low-common-mode differential amplifier

    Morrison, S. | NTRS | 1980



    CONVERTER MODULATION FOR REDUCTION OF COMMON-MODE LEAKAGE CURRENT

    LEHN PETER WALDEMAR / CASTRO DINIZ VIANA CANIGGIA / SEMSAR SEPEHR et al. | European Patent Office | 2021

    Free access