Communication-Free Control Scheme for Qi-Compliant Wireless Power Transfer Systems

Yun Yang, Siew Chong Tan, Shu Yuen Ron Hui

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

5 Citations (Scopus)

Abstract

A conventional Qi-compliant wireless power transfer (WPT) system comprises an amplitude-shift keying (ASK) modulator and a DC regulator at the receiver side. The ASK modulator sends power demand signals back to the transmitter by means of backscatter to adjust the input power, such that the DC regulator has sufficient headroom to maintain well-regulated output voltage. Alternatively, in this paper, a communication-free control scheme is proposed for Qicompliant WPT systems without a DC regulator. The output voltage is controlled by the ASK modulator without any communication between the transmitter and the receiver. Therefore, the switched transistor bridge of the transmitter can be controlled to track the maximum energy efficiency (MEE) of the WPT system. The proposed control scheme is simple and intuitive, which can be easily implemented in low-price digital controllers.

Original languageEnglish
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4955-4960
Number of pages6
ISBN (Electronic)9781728103952
DOIs
Publication statusPublished - Sep 2019
Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
Duration: 29 Sep 20193 Oct 2019

Publication series

Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
Country/TerritoryUnited States
CityBaltimore
Period29/09/193/10/19

Keywords

  • Amplitude-shift keying (ASK) modulator
  • Communication-free
  • DC regulator
  • Maximum energy efficiency (MEE)
  • Qi-compliant wireless power transfer (WPT) system

ASJC Scopus subject areas

  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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