Exploiting a Multi-Port Transformer for Minimal DC-Link Capacitance for an Automotive Onboard Charger

Research output: Contribution to conferencePaperpeer-review


In contrast to common 3-phase topologies, DC-link capacitance can be reduced by combining input
power after the DC-link using a multi-port transformer and suitable control. Initial results of this approach
demonstrate stable 12 kW output power using only 5 μF DC-link capacitance per phase, promising
higher power density and reliability. Furthermore, a novel control scheme is proposed that allows
high frequency reactive power flow through the multi-port transformer to be manipulated via gate-signal
phase angles, in order to achieve maximum efficiency and minimum DC-link voltage ripple for any load
Original languageEnglish
Publication statusPublished - 11 Sept 2020
Event22nd European Conference on Power Electronics and Applications: EPE 2020 ECCE Europe - Lyon, France
Duration: 7 Sept 202011 Sept 2020


Conference22nd European Conference on Power Electronics and Applications
Abbreviated titleEPE'20 ECCE Europe
Internet address


  • 3 phase onboard charger
  • DC-Link capacitance
  • Multiport LLC

ASJC Scopus subject areas

  • Control and Optimization
  • Safety, Risk, Reliability and Quality
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Fields of Expertise

  • Mobility & Production

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