Three phase LLC resonant converter with D-DLL control technique for EV battery chargers

Erdem Asa, Kerim Colak, Mariusz Bojarski, Dariusz Czarkowski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, Digital Delayed Locked Loop (D-DLL) control technique is applied to the three phase LLC resonant converter for Electric Vehicle (EV) battery charger applications. In order to improve charging efficiency, switching losses must be reduced to have a maximum energy transfer among the variable converter components. Also, fast and secure battery charging requires controlling the voltage and current values at the battery terminals. The presented control technique is implemented under soft switching conditions with variable load and variable input voltages. The three phase dc/dc resonant converter, fed by a power-factor-corrector (PFC) with 380-400 V output, provides 360 V / 22.5 A at 8 kW maximum power. At the same time, the output regulation is realized from PFC with a variable dc link. The application results show that soft switching are maintained under different input voltage and output load conditions.

Original languageEnglish (US)
Title of host publication2014 IEEE International Electric Vehicle Conference, IEVC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479960750
DOIs
StatePublished - Mar 6 2015
Event2014 IEEE International Electric Vehicle Conference, IEVC 2014 - Florence, Italy
Duration: Dec 17 2014Dec 19 2014

Publication series

Name2014 IEEE International Electric Vehicle Conference, IEVC 2014

Other

Other2014 IEEE International Electric Vehicle Conference, IEVC 2014
CountryItaly
CityFlorence
Period12/17/1412/19/14

Keywords

  • EV battery charger
  • digital delayed locked loop (D-DLL)
  • resonant LLC converter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Automotive Engineering

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