A Slightly Detuned Inductive Power Transfer System with High-misalignment Tolerance via Simple Modulation

Chen Chen, C. Q. Jiang, Yibo Wang, Tianlu Ma, Xiaosheng Wang, Wei Liu

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

Abstract

Physical misalignment between the transmitter coil and receiver coil is inevitable in inductive power transfer (IPT) systems, which will lower the coupling coefficient and then mutual inductance, causing a reduction in transmission power and efficiency to some extent. In this paper, a slightly detuned compensated IPT system in series-series topology is proposed to realize stable output power over a wide misalignment range by simple frequency and voltage modulation. Unlike other methods, there are no extra voltage control modules, closed-loop feedback, and complex coupler design in this detuned IPT system. The transmission performance of the system has been deduced using the fundamental harmonic approximation (FHA) method. Then the anti-misalignment ability is also obtained through theoretical analysis and numerical simulation. Meanwhile, current detection at the primary side provides a trigger for the controller to generate corresponding PWM signals with different shift angles, realizing frequency and voltage modulation. Finally, simulation and experiment results of a 100 W detuned IPT prototype are presented to validate the proposed slightly detuned IPT system, where the maximum output power fluctuation is only 3.89% when the coupling coefficient changes by 71.4% from 0.35 to 0.1.

Original languageEnglish
Title of host publication2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350337372
DOIs
Publication statusPublished - 22 Aug 2023
Externally publishedYes
Event2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023 - San Diego, United States
Duration: 4 Jun 20238 Jun 2023

Publication series

Name2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023 - Proceedings

Conference

Conference2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023
Country/TerritoryUnited States
CitySan Diego
Period4/06/238/06/23

Keywords

  • frequency modulation
  • high-misalignment tolerance
  • Inductive power transfer (IPT)
  • slightly detuned compensate
  • stable output power

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Control and Optimization
  • Instrumentation

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