Soft-Switching in Capacitive-Coupled Wireless Power Transfer with LCLC Compensation Networks

Eli Abramov, Mor Mordechai Peretz, Ilya Zeltser

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This study details the conditions for soft-switching in capacitively-coupled resonant converters that are compensated with LCLC compensation networks. The comprehensive analysis revealed that by design of the compensation networks' parameters according to the highest expected coupling capacitance, zero voltage switching (ZVS) conditions are achieved over the entire operation range. The results of the analysis further outline the way to control the current at switching events, so the soft-switching is obtained for all the operating conditions while the load is resistive on the receiving side. This provides a significant potential enhancement of the power transfer and processing efficiency, in particular for applications of wireless energy where the operating frequency is very high. Prior to experimental validation, the theoretical analysis has been verified by simulations. The simulation platform incorporates a simple and flexible cross-coupled model of the capacitive medium, as well as simulation-compatible variable inductor model, which have been developed and used to evaluate the results under various conditions. To validate the theoretical framework, a custom-designed variable inductor has been realized and experiments have been carried out on a LCLC capacitive-based wireless power transfer (WPT) prototype operated in the MHz range, and examined at 120 mm air-gap.

Original languageEnglish
Title of host publicationAPEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3151-3158
Number of pages8
ISBN (Electronic)9781728148298
DOIs
StatePublished - 1 Mar 2020
Event35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020 - New Orleans, United States
Duration: 15 Mar 202019 Mar 2020

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume2020-March

Conference

Conference35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020
Country/TerritoryUnited States
CityNew Orleans
Period15/03/2019/03/20

Keywords

  • LCLC compensation
  • capacitive coupler model
  • capacitive coupling
  • capacitive power transfer
  • soft-switching
  • tuned compensation network
  • zero-voltage switching

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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