Improved Inductive WPT System Modeling with a ZVDS Class-DE Current-Driven Full-Bridge Rectifier for Accurate Conduction Loss Analysis

Authors

  • Chainarin Ekkaravarodome Department of Instrumentation and Electrical Energy Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok
  • Setthapong Feungkeaw Research and Development Division, Micro Power Electronics and Technology Co., Ltd.
  • Kamon Jirasereeamornkul Department of Electronic and Telecommunication Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi
  • Yuttana Kumsuwan Department of Electrical Engineering, Faculty of Engineering, Chiang Mai University

DOI:

https://doi.org/10.37936/ecti-eec.2026243.266205

Keywords:

Inductive wireless power transfer, inductive WPT modeling, conduction loss analysis, ZVDS Class-DE current-driven full-bridge rectifier

Abstract

This paper presents an improved inductive wireless power transfer (WPT) system model with a zero-voltage and zero-derivative-switching Class-DE current-driven full-bridge rectifier for accurate conduction loss analysis. Conventional models typically assume a near-infinite magnetizing inductance with a negligible magnetizing current, which fails in applications where a low magnetizing inductance induces a very high magnetizing current. This elevated magnetizing current causes a significant phase lag of the input current relative to the input voltage of the transmitter compensation network, leading to substantial reactive power and increased conduction losses. Accordingly, the proposed model includes the coupling coefficient and these magnetizing effects into the key equations. To validate the proposed model, the developed inductive WPT converter utilizing a phase-shift controller at an 88-kHz switching frequency has been experimentally evaluated under a 360-V input voltage and 350-V output voltage, covering an output power range from 0.2 kW to a rated power of 1.8 kW at a 50-mm transfer distance.

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Author Biographies

Chainarin Ekkaravarodome, Department of Instrumentation and Electrical Energy Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok

Chainarin Ekkaravarodome (Member, IEEE) received the B.Ind.Tech. degree in industrial electrical technology from the KMUTNB, Bangkok, Thailand, in 2003, and the M.E. and Ph.D. degrees in electrical engineering and energy technology from the KMUTT, Bangkok, in 2005 and 2009, respectively.

He is currently an Associate Professor with the Department of Instrumentation and Electrical Energy Engineering, Faculty of Engineering, KMUTNB. His current research interests include induction heating, LED drivers, soft-switching power converters, and wireless power transfer.

Kamon Jirasereeamornkul, Department of Electronic and Telecommunication Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi

Kamon Jirasereeamornkul received the B.E. and M.E. degrees in electrical engineering and the Ph.D. degree in electrical and computer engineering from the KMUTT, Bangkok, Thailand, in 1997, 2001, and 2006, respectively.

He is currently an Assistant Professor with the Department of Electronic and Telecommunication Engineering, Faculty of Engineering, KMUTT. His current research interests include induction heating, LED drivers, power-factor-correction circuits, resonant rectifiers, soft-switching power converters, and wireless power transfer.

Yuttana Kumsuwan, Department of Electrical Engineering, Faculty of Engineering, Chiang Mai University

Yuttana Kumsuwan (Senior Member, IEEE) received the Ph.D. degree in electrical engineering from CMU, Chiang Mai, Thailand, in 2007.

He is currently a Professor with the Department of Electrical Engineering, Faculty of Engineering, CMU. He is the author of more than 100 technical papers (journal articles and conference proceeding papers). His current research interests include renewable energy systems, electric vehicles, and control of power electronics.

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Published

2026-09-29

How to Cite

Ekkaravarodome, C., Feungkeaw, S., Jirasereeamornkul, K., & Kumsuwan, Y. (2026). Improved Inductive WPT System Modeling with a ZVDS Class-DE Current-Driven Full-Bridge Rectifier for Accurate Conduction Loss Analysis. ECTI Transactions on Electrical Engineering, Electronics, and Communications, 24(3). https://doi.org/10.37936/ecti-eec.2026243.266205

Issue

Vol. 24 No. 3 (2026): Articles in Press, Pre-proof - Regular Issue (October)

Section

Power Electronics

Categories

License

Copyright (c) 2026 Assoc.Prof. Chainarin Ekkaravarodome, Ph.D., Setthapong Feungkeaw, Asst.Prof. Kamon Jirasereeamornkul, Ph.D., Prof. Yuttana Kumsuwan, Ph.D.

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