Maximizing Efficiency in Smart Adjustable DC Link Powertrains with IGBTs and SiC MOSFETs via Optimized DC-Link Voltage Control
Journal article, 2023

In recent years, the push towards electrifying transportation has gained significant traction, with battery-electric vehicles (BEVs) emerging as a viable alternative. However, the widespread adoption of BEVs faces multiple challenges, such as limited driving range, making powertrain efficiency improvements crucial. One approach to improve powertrain energy efficiency is to adjust the DC-link voltage using a DC-DC converter between the battery and inverter. Here, it is necessary to address the losses introduced by the DC-DC converter. This paper presents a dynamic programming approach to optimize the DC-link voltage, taking into account the battery terminal voltage variation and its impact on the overall powertrain losses. We also examine the energy efficiency gains of IGBT-based and silicon carbide (SiC) MOSFET-based adjustable DC-link voltage powertrains during WLTC driving cycles through PLECS and Matlab/Simulink simulations. The findings indicate that both IGBT and MOSFET-based adjustable DC-link voltage powertrains can enhance the WLTC drive-cycle efficiency up to 2.51%2.51% and 3.25%3.25% compared to conventional IGBT and MOSFET-based powertrains, respectively.

dynamic programming

silicon carbide (SiC) MOSFET

energy efficiency

DC-DC converter

battery-electric vehicle (BEV)


Yu Xu

Energy Conversion and Propulsion Systems

China-Euro Vehicle Technology (CEVT) AB

Anton Kersten

China-Euro Vehicle Technology (CEVT) AB

Bundeswehr University Munich

Simon Klacar

InfiMotion Technology Europe AB

David Sedarsky

Energy Conversion and Propulsion Systems


23130105 (eISSN)

Vol. 9 6 302

HEFE - Highly efficient electric vehicles

Swedish Energy Agency (51459-1), 2020-11-01 -- 2023-10-31.

Subject Categories

Vehicle Engineering

Control Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering



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