Design and development of a three-phase off-board electric vehicle charger prototype for power grid voltage regulation

Jia Ying Yong*, Seyed Mahdi Fazeli, Vigna K. Ramachandaramurthy, Kang Miao Tan

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Citations (Scopus)


This paper discussed the design and development of a 2 kVA three-phase off-board electric vehicle charger prototype with a practical voltage control, where the procedures of the experimental construction were comprehensively presented. For the experimental setup, the effectiveness of the interface circuits and auxiliary power supply units were individually validated. Moreover, the electric vehicle charger utilized a Digital Signal Processor to employ the control strategies of vehicle charging and power grid voltage regulation. The proposed control can simultaneously charge the battery of electric vehicle, maintain a constant DC-link voltage and also provide the appropriate reactive power compensation to regulate the grid voltage to the desired level. While complying with the power quality standards, the experimental results had validated the practicality of the integrated electric vehicle charger and the control performance. The charger prototype had effectively regulated the grid voltage to the pre-charge voltage of 0.96 per unit while maintaining the DC-link voltage at 150 V during various charging currents of up to 5 A.

Original languageEnglish
Pages (from-to)128-141
Number of pages14
Publication statusPublished - 15 Aug 2017


  • Batteries
  • Battery chargers
  • Electric vehicles
  • Experimental prototype
  • Power conversion
  • Voltage control

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Energy(all)
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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