A master programme thesis from Aalborg University
Paralleling of SiC Modules (upto 3) for Mega-Watt application ensuring equal current sharing operation: SiC MOSFET solution for PtX Applications - Industrial Internship at KK Wind Solutions
Author(s)
Term
3. term
Education
Publication year
2025
Submitted on
2025-01-09
Pages
72 pages
Abstract
This project focuses on implementing Green Hydrogen technology to reduce fossil fuel dependency. It explores using wide-bandgap (WBG) SiC MOSFETs instead of Si-IGBTs for electrolysers, leveraging their higher power density and switching speeds. The project involves paralleling SiC MOSFET modules and conducting Double Pulse Testing (DPT) on half-bridge configurations to observe current deviations. The problem is divided into three phases: current ramp-up, current jumps, and freewheeling phases. This project primarily addresses the current ramp-up phase. A FastHenry model simulates the impedance parameters of the switch-node busbar to equalize current sharing among power modules by impedance matching of the conduction paths. Using a new switch-node busbar and load inductor cables, a solution is proposed to ensure current sharing of two modules within tolerance limits during the first pulse. Further investigations will focus on understanding the turn-on/off characteristics, internal capacitances, and gate driver circuits of the power modules for a potential solution of the other two phases.
This project focuses on implementing Green Hydrogen technology to reduce fossil fuel dependency. It explores using wide-bandgap (WBG) SiC MOSFETs instead of Si-IGBTs for electrolysers, leveraging their higher power density and switching speeds. The project involves paralleling SiC MOSFET modules and conducting Double Pulse Testing (DPT) on half-bridge configurations to observe current deviations. The problem is divided into three phases: current ramp-up, current jumps, and freewheeling phases. This project primarily addresses the current ramp-up phase. A FastHenry model simulates the impedance parameters of the switch-node busbar to equalize current sharing among power modules by impedance matching of the conduction paths. Using a new switch-node busbar and load inductor cables, a solution is proposed to ensure current sharing of two modules within tolerance limits during the first pulse. Further investigations will focus on understanding the turn-on/off characteristics, internal capacitances, and gate driver circuits of the power modules for a potential solution of the other two phases.
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