Journal of Electrical Engineering & Technology

, Volume 14, Issue 6, pp 2409–2419 | Cite as

Frequency and Phase-Shift Control of Inductive Power Transfer for EV Charger with LCCL-S Resonant Network Considering Misalignment

  • Jongeun Byun
  • Minkook Kim
  • Dongmyoung Joo
  • Woo-Young Lee
  • Gyu-Yeong Choe
  • Byoung Kuk LeeEmail author
Original Article


In inductive power transfer (IPT) systems for electric vehicle applications, the coupling coefficient k and self-inductances of the pads can vary depending on the misalignment and vertical distance due to the presence of loosely coupled pads. Furthermore, the operating frequencies of IPT systems are restricted by a Society of Automotive Engineers standard. These frequencies lead to increases in volt-ampere rating and switching losses. Therefore, this paper proposes a control method for operation in a zero voltage switching region close to the zero phase angle frequency for a low volt-ampere rating considering k and the self-inductance variation in a limited operating frequency range. A mathematical analysis is performed, and the critical coupling coefficients of the proposed control are derived. Simulation and experimental results using a 3.3 kW IPT prototype are presented so as to verify the numerical analysis.


Inductive power transfer (IPT) Frequency control Phase-shift control SAE J2954 Limited operating frequency 



This work was supported by “Human Resources Program in Energy Technology” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Korea. (No. 20184030202190). This work was supported by the Korea Institute of Energy.


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Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  • Jongeun Byun
    • 1
  • Minkook Kim
    • 2
  • Dongmyoung Joo
    • 3
  • Woo-Young Lee
    • 4
  • Gyu-Yeong Choe
    • 4
  • Byoung Kuk Lee
    • 1
    Email author
  1. 1.Department of Electrical and Computer EngineeringSungkyunkwan UniversitySuwonSouth Korea
  2. 2.Chief Technology Officer, LG ElectronicsSeoulSouth Korea
  3. 3.Intelligent Mechatronics Research CenterKorea Electronics Technology InstituteBucheonSouth Korea
  4. 4.Automotive Research and Development DivisionHyundai Motor GroupHwaseongSouth Korea

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