Tokyo Metropolitan University Engineers Develop Desktop Testing Platform to Accelerate Dynamic Wireless Charging Research for Electric Vehicles

Tokyo Metropolitan University scientists build a compact rotating device to test wireless EV charging at 40km/h, replacing the need for large test tracks.

By: AXL Media

Published: Feb 28, 2026, 8:30 AM EST

Source: The information in this article was sourced from Tokyo Metropolitan University

Overcoming the Infrastructure Barrier of Dynamic Charging

The global transition toward sustainable transportation relies heavily on the widespread adoption of electric vehicles. However, current models continue to face significant challenges regarding battery cost and limited travel range. To address these hurdles, researchers are prioritizing Dynamic Wireless Power Transfer, a technology designed to charge vehicles while they are in motion. By embedding transmitter coils beneath road surfaces, vehicles equipped with receiver units can draw power continuously, theoretically allowing for smaller, less expensive batteries. Despite the elegance of this solution, the high cost and vast space required for linear test tracks have historically limited this research to well-funded, large-scale facilities.

Engineering a Tabletop Alternative

A research team led by Assistant Professor Ryosuke Ota at Tokyo Metropolitan University has effectively brought high speed testing into the laboratory setting through a rotating mechanical device. This platform utilizes a counterbalanced arm driven by a servo motor to move a receiving unit over a bean-shaped transmitter coil. By replicating the relative motion between a car and a road-embedded coil on a benchtop scale, the team has provided a feasible pathway for academic institutions and smaller laboratories to contribute to automotive engineering. This innovation shifts the focus from massive civil engineering projects to refined laboratory experimentation.

Simulation and Safety Validation

Before constructing the physical prototype, the engineering team conducted extensive electromagnetic field simulations to ensure the validity of the desktop model. These simulations demonstrated that the magnetic fields produced by the curved, rotating path were comparable to those generated by traditional linear charging tracks. Furthermore, the team performed rigorous assessments of the mechanical stress placed on the device during high speed rotation. Finding the platform to be structurally sound and safe for operation, the researchers confirmed that their design principles could serve as a reliable foundation for evaluating the efficiency of next-generation charging systems.