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 have developed a range of spatial wireless charging container designs based on inductive-resonant wireless power transfer technologies. These designs have undergone multiple iterations of improvement, with the latest version filed for patent (Y. Yang and K. Wang, “A Cubic Wireless Charging Container”, Patent Application Number: PCT/SG2025/050115, 19/02/2025). Our objectives are 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 complying with electromagnetic compatibility and safety regulations. We are recognized as one of the leading research groups in this field.

The video (https://youtu.be/SQTl0rvCTSQ) demonstrates an ultra-uniform wireless charging container that we have developed.

Electromagnetic Metasurface

We are developing enhanced and shielded metasurfaces operating across the kilohertz and megahertz frequency ranges. The latest iteration of the enhanced design has been filed for a patent (Y. Yang and K. Wang, “Transmitter Arrangement, Wireless Power Transfer System and Methods of Forming the Same,” Patent Application Number: PCT/SG2025/050250, 10/04/2025).

Video link: https://youtu.be/w6VtAAXrhbo

High-Frequency PCB-Based Hybrid Power Resonators

We have developed several versions of PCB-based hybrid WPT coils operating at megahertz frequencies. The parameters of these coils have been optimized using AI and advanced algorithms to achieve high efficiency and low cost, tailored to specific requirements such as resonant frequency, size, and materials.

Underwater Wireless Power Transfer

We are developing advanced WPT systems designed for operation in underwater environments.

Dynamic Wireless Power Transfer

We have developed a medium-power dynamic WPT system (https://youtu.be/IfWyw-Facpg).

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. One monograph is scheduled for publication in October 2025.