A Modulation Map for a Family of Phase-Shift-Modulated Resonant Switched-Capacitor Converters

Inthis article, amodulationmap for a family of phaseshift-modulated resonant switched-capacitor converters (RSCs) which reflects the relationship between the control variables and converter characteristics is proposed to guide the converter operation and design in the expected voltage gain range, low component stress region, and zero-voltage-switching (ZVS) operation region. A hybrid modulation strategy combing phase-shift and variable frequency is applied to extend the voltage gain range and ZVS region. On the basis, the modulation map with the favorable operation region is obtained to assist the converter operation and design in the expected conversion ratio range, lowcomponent stress region, and ZVS operation region. Similar analyzing methods and modulation maps can be extended to N-mode RSCs and other phase-shift-modulated RSCs, providing operation and design reference for such converter families. A 43-60 to 150 V prototype of a triple-mode RSC with power level 225 W and peak efficiency 96.2% was designed and tested to verify the converter operation and validity of the proposed modulation map.

Automated summary

In this article, a modulation map is proposed for a family of phase-shift-modulated resonant switched-capacitor converters (RSCs) to guide the converter operation and design within the desired voltage gain range, low component stress region, and zero-voltage-switching (ZVS) operation region. The modulation map incorporates a hybrid modulation strategy combining phase-shift and variable frequency to expand the voltage gain range and ZVS region. Similar analysis methods and modulation maps can be applied to other RSCs, providing valuable operation and design references. A prototype of a triple-mode RSC with a power level of 225W and peak efficiency of 96.2% was designed and tested to validate the proposed modulation map.