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A Novel Two Degrees of Freedom Control Strategy for Multi-load Magnetically Coupled Resonance System

  • Harbin Institute of Technology Shenzhen

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

Abstract

The application scenarios of multi-load magnetically coupled resonance (MCR) wireless power transfer (WPT) are becoming more and more extensive, and the independent control of the voltage of multiple loads is imminent. A two-degree-of-freedom control strategy for a dual-frequency dual-receiving coil system is proposed in this paper. Based on low-frequency SPWM, the frequency of the carrier wave is only three times the frequency of the modulating wave. Fundamental voltage and harmonic voltage at switching frequency are obtained on the primary side. A buck converter is cascaded in front of the inverter. By controlling the two degrees of freedom, the duty cycle α of the buck converter and the modulation degree M of the SPWM, the amplitude of the voltage of the two frequencies at the output of the inverter can be independently controlled. The theoretical results are verified by experiments. The experimental results show that the dual-frequency dual-receiving coil system based on dual-degree-of-freedom control can achieve independent control of the output voltage under different loads.

Original languageEnglish
Title of host publicationIECON 2022 - 48th Annual Conference of the IEEE Industrial Electronics Society
PublisherIEEE Computer Society
ISBN (Electronic)9781665480253
DOIs
StatePublished - 2022
Externally publishedYes
Event48th Annual Conference of the IEEE Industrial Electronics Society, IECON 2022 - Brussels, Belgium
Duration: 17 Oct 202220 Oct 2022

Publication series

NameIECON Proceedings (Industrial Electronics Conference)
Volume2022-October
ISSN (Print)2162-4704
ISSN (Electronic)2577-1647

Conference

Conference48th Annual Conference of the IEEE Industrial Electronics Society, IECON 2022
Country/TerritoryBelgium
CityBrussels
Period17/10/2220/10/22

Keywords

  • Dual-frequency
  • dual-receiving
  • wireless power transfer

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