A CLLC-compensated high power and large air-gap capacitive power transfer system for electric vehicle charging applications

Fei Lu, Hua Zhang, Heath Hofmann, Chris Mi

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

104 Scopus citations

Abstract

This paper proposes a CLLC-compensated capacitive power transfer system for electric vehicle charging applications. Four metal plates are utilized to form two capacitors to transfer power through an air-gap distance of 150 mm. The CLLC compensation circuit topology is used on both the primary and secondary sides to resonate with the power transmitting capacitors. The resonance provides high voltage on the plates to increase the system power level. A comparison to the previously proposed LCLC circuit topology is also presented, which shows that the resonance inductance can be reduced. The circuit model of the coupling plates is provided and the capacitance variation with differing misalignments and air-gap distances is also analyzed. A 2.9kW input power CPT system with a CLLC compensation circuit is designed and implemented. The experimental prototype operates at 1MHz, and its dc to dc efficiency is 89.3% at 2.57 kW output power and a 150 mm air gap distance, which validates the effectiveness of the proposed CLLC compensation circuit. In the future, the system will be optimized to increase its efficiency.

Original languageEnglish (US)
Title of host publication2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1721-1725
Number of pages5
ISBN (Electronic)9781467383936
DOIs
StatePublished - May 10 2016
Externally publishedYes
Event31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016 - Long Beach, United States
Duration: Mar 20 2016Mar 24 2016

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume2016-May

Conference

Conference31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016
Country/TerritoryUnited States
CityLong Beach
Period3/20/163/24/16

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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