Inductance and Parasitic Capacitance Modeling of Spiral Air-core Inductor in MHz Inductive Power Transfer System

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Air-core inductors are widely applied in high-frequency inductive power transfer (IPT) systems. However, its behavior at high frequencies is very different from that at low frequencies due to parasitic capacitance. In order to estimate the parasitic parameters of the air-core inductors at the design phase and avoid the designed inductors working at the capacitive range, this paper investigates the model of a spiral air-core inductor, including inductance and parasitic capacitance. Compared with previous models, which neglected the capacitance between non-adjacent turns, the proposed one considers all the turn-to-turn capacitance to obtain a more accurate result. The proposed model was verified by simulation and experimental measurement. The calculation, simulation, and measurement results are in good agreement. Compared to the measured results, the errors of the calculated inductance, capacitance, and self-resonant frequency are 2.0%, 7.4 %, and 4.1 %, respectively. Therefore, the proposed model is applicable to estimate inductance and parasitic capacitance for designing a better high-frequency air-core inductor.
Original languageEnglish
Title of host publicationProceedings of 2023 IEEE Applied Power Electronics Conference and Exposition
PublisherIEEE
Publication date23 Mar 2023
Pages75-81
Article number10131527
ISBN (Print)978-1-6654-7540-2
DOIs
Publication statusPublished - 23 Mar 2023
Event38th Annual IEEE Applied Power Electronics Conference and Exposition - Orange County Convention Center, Orlando, United States
Duration: 19 Mar 202323 Mar 2023

Conference

Conference38th Annual IEEE Applied Power Electronics Conference and Exposition
LocationOrange County Convention Center
Country/TerritoryUnited States
CityOrlando
Period19/03/202323/03/2023

Keywords

  • Inductance
  • Analytical models
  • Spirals
  • Atmospheric modeling
  • Measurement uncertainty
  • Frequency measurement
  • Capacitance measurement

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