SUSTAINABLE POWER CONVERSION LAB
Laboratory
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.
Wireless Power Transfer for Robots
We are highly active in the development and deployment of wireless power transfer technologies as alternative power supply solutions for various robotic platforms, with the goal of delivering world-leading wireless charging solutions.
One-to-One Charging
One-to-Multiple Charging
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.
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).
High-Frequency PCB-Based Hybrid Power Resonators
We have developed several versions of PCB-based WPT coils operating at megahertz frequencies. These coils have been optimized using AI-assisted and advanced optimization algorithms to achieve high efficiency and low cost while meeting specific design requirements such as resonant frequency, geometry, and material constraints. Key technical details can be found in [paper-1], [paper-2].
Underwater Wireless Power Transfer
We have developed some WPT systems for underwater devices (such as underwater drones).
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Dynamic Wireless Power Transfer
We have developed a DWPT system for AGVs and AMRs, and drones.
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 was publication in November 2025.
