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The CCCN-CityU-PolyU Joint Seminar Series began in 2001, and has since become regular weekly meetings for visitors, faculty, researchers and students to discuss latest progresses in their research.

The next seminar is:

Date & Time: April 17, 2026, Friday, 4:30pm-5:30pm
Title: Study on the Application of Nanocrystalline Magnetic Materials in Wireless Power Transfer Systems

Speaker: Dr Chen Chen, City University of Hong Kong

Venue: FYW-3316 CityU
Zoom ID 270 294 7238
Password 123456

Abstract:
Magnetic materials such as ferrite are commonly used in wireless power transfer (WPT) systems to shield flux leakage and enhance coupling between the primary and secondary coils. However, their low saturation flux density often results in large volumes, while their brittle mechanical properties lead to reduced mechanical strength. This work innovatively explores the application of nanocrystalline magnetic materials in WPT systems. Their configurable permeability and flexible structure enable customized designs, particularly for non-planar installation scenarios. The crushed nanocrystalline core exhibits lower core loss than its non-crushed counterpart, with more severe crushing resulting in reduced permeability and loss. Moreover, the square crushing pattern produces more regular flakes and better insulation compared to dot crushing, thereby achieving lower core loss. Furthermore, a novel terrace-shaped nanocrystalline flake ribbon core (T-NFR) is investigated to mitigate non-uniform magnetic flux distribution, which helps achieve relative temperature balance and enhance system stability.

Speaker's Bio:
Chen Chen received the B.Eng. and M.Eng. degrees in Mechanical Engineering from Wuhan University of Technology, Wuhan, China, in 2019 and 2022, respectively, and the Ph.D. degree in Electrical Engineering from City University of Hong Kong, Hong Kong SAR, China, in 2026. He is a Postdoctoral Fellow in the Department of Electrical Engineering at the City University of Hong Kong, as well as a member of the State Key Laboratory of Terahertz and Millimeter Waves. His current research interests include wireless power transfer, and applications of nanocrystalline magnetic material in power electronics.

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WHAT'S NEWS

Congratulations to Prof. Michael Tse on his being inducted to the Hong Kong Academy of Engineering as its Fellow.

The Hong Kong Academy of Engineering announced on November 26, 2025, the induction of twelve exceptional professionals as Fellows, who were elected at its 32nd annual general meeting on September 8, 2025 and were formally inducted at a ceremony held on November 24, 2025 at HOPEWELL Hotel. The citation for Prof. Tse's election is "For pioneering contributions in power electronics, including ultra-fast-transient voltage regulation, sliding-mode control for converters, robust EV charging, and wireless power transfer."

Congratulations to Prof. Ron Chen on being awarded The Ichtiaroglou Award
The Ichtiaroglou Award recognizes Prof. Chen's lifetime achievement in Nonlinear Systems Theory. The award ceremony will be held at the Second DANOC Days of Applied Nonlinearity and Complexity in January 2026.

Our Centre and The Applied Mathematical Science Research Centre of Jiangsu Province have recently signed an MoU to promote academic research, exchange, and sharing of results and resource, aiming to promote high-quality research and knowledge transfer in areas of complex systems, networks, applied mathematics. This agreement will strengthen the collaborative relationship between the two centres, and foster talent exchange and development between Hong Kong and Jiangsu Province.

Congratulations!

Prof Ron Chen was elected as NetSci Fellow 2025! The NetSci Fellowship recognizes researchers who have made outstanding and significant contributions to network science research and to the community of network scientists. Elected nominees are named Fellows of the Network Science Society. The Fellowship will be awarded each year to up to 7 members of the community on the basis of their exceptional life-long individual contributions to any area of network science research and to the community of network scientists (locally and globally). All members of the community are eligible for nomination and election to the Fellowship. Selection from the pool of nominees will be conducted by the Fellowship Committee, to be appointed by the Network Science Society board and composed of a minimum of 4 prominent researchers active in the area of network science.

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Date & Time:	April 17, 2026, Friday, 4:30pm-5:30pm
Title:	Study on the Application of Nanocrystalline Magnetic Materials in Wireless Power Transfer Systems
Speaker:	Dr Chen Chen, City University of Hong Kong
Venue:	FYW-3316 CityU Zoom ID 270 294 7238 Password 123456
Abstract:	Magnetic materials such as ferrite are commonly used in wireless power transfer (WPT) systems to shield flux leakage and enhance coupling between the primary and secondary coils. However, their low saturation flux density often results in large volumes, while their brittle mechanical properties lead to reduced mechanical strength. This work innovatively explores the application of nanocrystalline magnetic materials in WPT systems. Their configurable permeability and flexible structure enable customized designs, particularly for non-planar installation scenarios. The crushed nanocrystalline core exhibits lower core loss than its non-crushed counterpart, with more severe crushing resulting in reduced permeability and loss. Moreover, the square crushing pattern produces more regular flakes and better insulation compared to dot crushing, thereby achieving lower core loss. Furthermore, a novel terrace-shaped nanocrystalline flake ribbon core (T-NFR) is investigated to mitigate non-uniform magnetic flux distribution, which helps achieve relative temperature balance and enhance system stability.
Speaker's Bio:	Chen Chen received the B.Eng. and M.Eng. degrees in Mechanical Engineering from Wuhan University of Technology, Wuhan, China, in 2019 and 2022, respectively, and the Ph.D. degree in Electrical Engineering from City University of Hong Kong, Hong Kong SAR, China, in 2026. He is a Postdoctoral Fellow in the Department of Electrical Engineering at the City University of Hong Kong, as well as a member of the State Key Laboratory of Terahertz and Millimeter Waves. His current research interests include wireless power transfer, and applications of nanocrystalline magnetic material in power electronics.