Laboratory

Wireless Power Transfer

Wireless power transfer is one of the key research areas in our group. Our key technologies in spatial wireless power transfer, electromagnetic metasurface, high and ultrahigh frequency inductive and capacitive power transfer, underwater wireless power transfer, and dynamic wireless power transfer are at the forefront of this field globally.

Spatial Wireless Power Transfer

We currently have a variety of spatial wireless charging container designs based on inductive-resonant wireless power transfer technologies. Our designs have undergone several iterations of enhancement, with the latest version filed for a patent (Y. Yang and K. Wang, “A Cubic Wireless Charging Container”, Patent Application Number: 10202400647V, 08/03/2024) by NTUitive. Our goal is to achieve a uniform magnetic field distribution within the container, maximize power transfer efficiency, minimize charging time, and enable rapid detection of foreign objects, all while adhering to electromagnetic compatibility safety regulations. We are one of the leading research groups in this field.

This video showcases an ultra-uniform wireless charging container we have developed.

Electromagnetic Metasurface

We are developing both enhanced and shielded metasurfaces that operate within the kilohertz and megahertz frequency spectrum. The figure shows a 13.56 MHz shielded metasurface. We have also developed an enhanced relay coil operating in the kilohertz frequency spectrum for impressive power amplification. This technology has been applied for a patent (Y. Yang and K. Wang, “New Wireless Power Transmitters for Significant Transmission Distance and Output Power Enhancement”, Patent Application Number: 10202401411Y, 20/05/2024) via NTUitive.

High-Frequency PCB Based Inductive and Capacitive Power Resonators

We have developed multiple versions of PCB-based IPT and CPT coils for megahertz-frequency WPT. The parameters of these coils have been optimized using advanced algorithms to ensure high efficiency and low costs, tailored to specific requirements regarding resonant frequency, size, and materials.

Underwater Wireless Power Transfer

We are developing advanced planar and spatial WPT systems for operation in underwater environments.

Dynamic Wireless Power Transfer

We have developed a medium-power dynamic WPT system.

Control Paradigm Shift

We have developed a series of innovative control schemes based on a new paradigm that shifts 99% of the regulation to the transmitter side of wireless power transfer (WPT) systems, significantly minimizing components on the receiver side. This approach simplifies power conversion at the receiver while eliminating the need for communication devices. The new control paradigm is particularly well-suited for the recently launched "Qi2" standard by the Wireless Power Consortium, as well as for emerging applications in medical equipment and underwater vehicles. To date, we have published 15 articles in top-tier journals on this topic, including one Best Paper (0.5%) in the IEEE Journal of Emerging and Selected Topics in Power Electronics.