• Session No.59 Cutting-Edge Technologies of ERS and DWPT (OS)
  • May 28 Pacifico Yokohama North G416+G417 9:30-11:35
  • Chair: Yukio Yokoi (Takushoku University)
Contents
As vehicle electrification continues to advance, growing attention is being paid to technologies that enable not only stationary but also in-motion charging—so-called “electrified roads.” Among them, Dynamic Wireless Power Transfer (DWPT) is expected to become a breakthrough solution that can significantly extend the driving range of electric vehicles while reducing the need for large onboard batteries. This session will highlight the latest developments in DWPT technologies, including innovations in ground-side infrastructure, vehicle-side circuit design, and progress in deployment strategies. It will also showcase a broad range of research and implementation efforts aimed at making this technology viable for real-world applications. Furthermore, special attention will be given to the interdisciplinary nature of DWPT, where collaboration across electrical engineering, civil infrastructure, and information and communication technology is essential. By providing a platform for discussion and knowledge exchange, this session aims to foster integrated technical approaches and accelerate the realization of electrified road systems.
Committee
Wireless Power Transfer System Technology Committee
Organizer
Takehiro Imura (Tokyo University of Science), Jun-ichi Itoh (Nagaoka University of Technology), Yoichi Hori (Tokyo University of Science), Katsuhiro Hata (Shibaura Institute of Technology), Yukio Yokoi (Takushoku University), Keisuke Kusaka (Nagaoka University of Technology)
For presentations that will not be available video streaming after congress, a “✕” is displayed in the “Video” column, so please check.
No. Video Title･Author (Affiliation)
1 ◯

On the Usefulness of Calculating Leakage Magnetic Fields Using a Magnetic Dipole Model in Dynamic Wireless Power Transfer

Takehiro Imura (Tokyo University of Science)

In this paper, we validate the magnetic dipole model for evaluating leakage magnetic fields in dynamic wireless power transfer systems. After identifying the wireless power transfer region with respect to the boundary between the near and far fields, we clarify the range of applicability of the magnetic dipole model from the viewpoint of wavelength by comparing it with electromagnetic field analysis results, thereby demonstrating that analysis based on the magnetic dipole model is an effective and simple evaluation method.
2 ◯

Electric road at the Osaka-Kansai Expo

Koichi Tanaka･Asako Mizobuchi･Yasuhiro Tomita (OBAYASHI CORPORATION)

An experiment on dynamic wireless power transfer was conducted using EV buses at the 2025 Osaka-Kansai Expo. The transmission coil was embedded in precast concrete to protect the coil against bus wheel loads. This paper describes the development of the materials for the precast concrete and the concepts of the precast concrete design.
3 ◯

Demonstration test of power supply control for electrified roads at the Osaka-Kansai Expo

Yoshinori Tsuruda (DAIHEN)

At the 2025 Osaka-Kansai Expo, a demonstration test of in-motion power supply was conducted using an EV bus. Using the bus stop and part of the straight track of the venue's circular bus, power was supplied to the EV bus while it was stopped and in motion. This session explains the power supply mechanism and how power is continuously transmitted from multiple coils to the EV.
4 ◯

Optimal Location of DWPT in the National Expressway Network

Yudai Honma･Hiroyuki Hasada･Junya Maruyama (The University of Tokyo)

This presentation examines the optimal location of DWPT in the national expressway network.
5 ◯

Technical Challenges and Practical Development for Social Implementation of In-motion Wireless Power Transfer

Katsuhiro Hata (Shibaura Institute of Technology)

In-motion wireless charging technology is expected to have technical challenges that do not exist in stationary wireless charging. While the details are wide-ranging, this presentation will focus on the technical challenges when looking toward social implementation, and introduce research and development aimed at resolving these challenges and their practical applications.
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