Prof. Laili Wang
Xi’an Jiaotong University, Chinaa
Prof. Laili Wang is a Full Professor of Xi’an Jiaotong University. He has authored or coauthored more than 300 papers in IEEE journals and conferences, and has been issued 60 patents. His research interests include wide bandgap power semiconductors, packaging and integration, and high-density power conversion.
Dr. Wang was the recipient of the Gold Medal Award of Geneva Inventions, the First Prize Award of Science and Technology Progress of China Power Supply Society (CPSS), the First Prize of Technical Invention of China Electrotechnical Society (CES), the Second Prize Award of Natural Science of Shaanxi Province, the National Science Fund for Distinguished Young Scholars, the Shaanxi Youth Science and Technology Award, the Outstanding Youth Award of China Power Supply Society (CPSS), the Youth Science and Technology Award of China Electrotechnical Society (CES), and the China Electric Power Excellent Young Technological Talent Award of Chinese Society of Electrical Engineering (CSEE).
He is an Associate Editor for IEEE TRANSACTIONS ON POWER ELECTRONICS and IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS. He is the Co-Chair of System Integration and Application in International Technology Roadmap for Wide Band-Gap Power Semiconductor (ITRW), the Chair of IEEE PELS and CPSS Joint Chapter in Xi’an, and the Vice Chair of IEEE PELS Membership Committee-China. He is also the Vice Chair of the four committees in China Power Supply Society (CPSS).
Tutorial Topic
Coming soon
Prof. Jingxin Hu
Nanjing University of Aeronautics and Astronautics, China
Prof. Jingxin Hu received the B.S. degree from Northeastern University, Shenyang, China, in 2010, and the M.Sc. degree and the Dr.-Ing. degree (summa cum laude) from RWTH Aachen University, Aachen, Germany, in 2013 and 2019, all in electrical engineering. He was with ABB Corporate Research Center (Switzerland) in 2012 and General Electric Global Research Center (Germany) from 2013 to 2014. He was a Research Associate (2014-2019) and Senior Scientist (2019-2022) with E.ON Energy Research Center, RWTH Aachen University, Germany.
Since 2022, he has become a Full Professor at Nanjing University of Aeronautics and Astronautics, China. Dr. Hu was a recipient of the Prize Paper Award of IEEE IPEC ECCE Asia in 2018, the STAWAG Best Dissertation Prize of RWTH Aachen University in 2019, and IEEE TPEL Outstanding Reviewer Award in 2021 and 2023. He serves as Guest Editor and Guest Associate Editor of IEEE Transactions on Power Electronics, Associate Editor for the Journal of Power Supply, Technical Program Committee Co-Chair of IEEE eGrid 2020, and Secretary General of IEEE PEDG 2025. His main research interests include solid-state transformers and intelligent energy routers, for renewable power generation and transportation electrification, as well as dc transmission and distribution.
Tutorial Topic
Intelligent DC Solid State Transformers for Distribution Systems: Topology, Modulation, Dynamic and Fault Handling Control
This tutorial presents advanced solutions of DC solid-state transformers (SST) for DC distribution systems and microgrid applications, aiming for high-efficiency, high power density, high dynamics, high reliability and high fault tolerance.
The first part will identify the urgent and promising application scenarios of DC SST in the electrical energy systems, and present an overview of development advances in the state-of-the-art DC SSTs. The modular and partial modular topology architectures will be discussed for various voltage levels, and the resonant, non-resonant and even hybrid power cells are examined. Integrated DC SSTs with inherent power/voltage balancing are also presented for bipolar DC grid applications.
The second part will focus on the modulation techniques for enhancing the converter efficiency and boosting transient dynamics of dual-active-bridge (DAB) based DC SSTs. The soft-switching characteristic of both single-phase and three-phase DAB converters will be compared, and intuitive modulation methods to extend the soft-switching range of both converters are introduced, with optimized conduction loss. Instantaneous flux and current control of DAB converters are presented to demonstrate how an ultra-fast and smooth transient can be realized without compromising the device current stress or causing the transformer saturation.
The third part will provide an in-depth discussion on the control of the DC SSTs in extreme operation scenarios such as DC short circuit faults and black start-up. A fault-ride-through scheme is presented to provide a controllable fault current for the fault detection without overstressing the power semiconductor devices. This further leads to discussions of breakerless protection of DC grids based on DC SSTs. Last but not least, to enable a fast recovery, a closed-loop black start-up method is presented, which establishes the DC-link voltage following the trajectory of the maximum allowable current stress.
This tutorial is concluded with the existing challenges and research outlook of DC SSTs.
Prof. Qingbin Chen
Fuzhou University, China
Prof. Qingbin Chen received his B.E. and Ph.D. in electrical engineering from Fuzhou University, Fuzhou, China, in 2007 and 2012, respectively. He worked as a visiting scholar at the University of Florida, Gainesville, FL, USA, from 2017 to 2018. He is currently a professor and doctoral supervisor at Fuzhou University. He also serves as a member of Magnetic Components and Ferrite Materials (Magnetic Standards Committee of China), Vice Chairman and Deputy Secretary General of the Magnetic Technology Committee of the China Power Supply Society (CPSS), and Director of the Popular Science Education Base of CPSS. He has over 30 SCI/EI publications and 29 patents. His research interests include high-frequency magnetic technology, EMC diagnosis and suppression technology, and wireless power transfer.
Analysis and Optimization Design of Electromagnetic Interference Characteristics of Magnetic Components in Power Converter
With the development of technology and the improvement of requirements for power converter products, high efficiency, high power density, high reliability, low cost, and low height have become the most critical technical indicators of power converters. At the same time, the standards for conduction emission (CE) and radiation emission (RE) electromagnetic compatibility are the basic requirements that all power converters need to meet. With the increase in switching frequency and power density, the electromagnetic effect of distributed parameters of magnetic components and the near-field coupling effect between devices have become increasingly significant, making the electromagnetic compatibility problem of power converters hard to solve. EMI filters are widely used in practical applications to solve electromagnetic interference problems in power converters. The board area and weight of existing EMI filters account for as much as 30% to 40% of the entire power converter, which has become a key technical bottleneck restricting the further improvement of power density in power converters.
This report starts from the basic countermeasures of electromagnetic interference in power converters and points out the importance of optimizing the design of magnetic components to solve the problem of electromagnetic interference in power converters. Analyzed the influence of parasitic parameters of magnetic components on differential and common mode noise, revealed the mechanism of parasitic parameters of power inductors and transformers from the view side of electromagnetic fields, and proposed corresponding parasitic parameter control methods and evaluation methods. At the same time, a detailed analysis was conducted on the electrical parameter design method of EMI filters and the near-field coupling problem in power converters. Finally, the magnetic components' influence mechanism and evaluation method for the radiated EMI of long cable power converters were introduced. This report aims to provide a new perspective and technical reference for teachers, students, and engineers engaged in electromagnetic compatibility research of power converters by analyzing the mechanism of magnetic components on electromagnetic compatibility and optimizing design methods.
Prof. Haoyu Wang
ShanghaiTech University, China
Prof. Haoyu Wang received the bachelor’s degree with Distinguished Hons. from Zhejiang University, Hangzhou, China, in 2009, and the Ph.D. degree from the University of Maryland, College Park, MD, USA, in 2014, both in electrical engineering.
In 2014, he joined the School of Information Science and Technology, ShanghaiTech University, where he is currently a Full Professor with tenure. In 2023, he was a Visiting Academic Fellow with the University of Cambridge, U.K. His research interests include power electronics, electric vehicles, renewable energy systems, and power management integrated circuits.
Dr. Wang is an IET Fellow. He serves as an Associate Editor of IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION, and CPSS Transactions on Power Electronics and Applications. He was a Guest Associate Editor of IEEE TRANSACTIONS ON POWER ELECTRONICS.
Next generation AI datacenter power supply: topology, control and heterogeneous integration
This tutorial presents advanced solutions for high-performance data center power supplies targeting ultra-high step-down ratio, ultra-high current, and ultra-fast dynamics demands.
Part I addresses heterogeneous integration techniques for high-frequency transformers, which are critical for meeting stringent efficiency and power density requirements. While magnetic integration improves performance, it falls short in fully addressing load point-specific challenges. This section explores hybrid circuit integration, winding cancellation techniques for high-current applications, and strategies for integrating magnetic cores, windings, and switching networks.
Part II focuses on resonant switched capacitor circuits tailored for high power density. Capacitors, favored for their high energy density, face limitations due to charging and switching losses. By introducing inductors, hybrid or resonant topologies can significantly mitigate these losses. The session explains the principles of resonant switched capacitor circuits, analyzes a two-stage cascaded structure, and proposes a voltage gain adjustment method enabling closed-loop control.
Part III provides an in-depth review of trans-inductor voltage regulator (TLVR) converters for data center point-of-load applications. A multi-phase series-capacitor TLVR with constant on-time control is introduced. This architecture splits input voltage across Buck cells, halving voltage stress while doubling the step-down ratio and duty cycle. Its indirectly coupled output inductors and low transient inductance enable ultra-fast dynamic response. Small-signal modeling via the describing function method accurately predicts system behavior, validated through SIMPLIS simulations and experimental results, offering insights for controller optimization.
Dr. Jiayang Wu
Research Assistant Professor
City University of Hong Kong, China
Dr. Jiayang Wu received the B.Eng. degree in Electrical Information Engineering from Zhejiang University, Hangzhou, China, in 2017, and the Ph.D. degree in Electrical and Electronic Engineering from The University of Hong Kong, Hong Kong, in 2022. She has worked as a Research Fellow at the School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore in 2023. Following this role, she held the position of a Research Assistant Professor with the Department of Electrical and Electronic Engineering at The University of Hong Kong, Hong Kong in 2024.
She is currently a Research Assistant Professor in Department of Electrical Engineering, City University of Hong Kong, Hong Kong. She was a recipient of the Best Paper Award (Second Place) of the IEEE TRANSACTIONS ON POWER ELECTRONICS in 2019 and 2023, and the Best Presentation Award of the IEEE Applied Power Electronics Conference and Exposition in 2024. Her current research interests include wireless power transfer, electric vehicle charging, resonant converters, and renewable energy.
A Paradigm Shift in Control Approaches for Next-Generation Wireless Power Transfer Systems
This tutorial examines the evolution of the Qi wireless power transfer (WPT) standard, launched in 2010, which aims to maximize compatibility among manufacturers through diverse transmitter and receiver designs. The Wireless Power Consortium (WPC) is expanding WPT applications to mid- and high-power levels, reaching several kilowatts, while the Society of Automotive Engineers (SAE) has established standards for wireless charging of electric vehicles up to tens of kilowatts. A crucial paradigm shift from compatibility to optimal performance is necessary, focusing on maximizing energy efficiency and minimizing charging time.
The tutorial introduces various methods to enhance energy efficiency during the battery charging process and reduce charging duration. It critiques traditional constant-current and constant-voltage modes due to thermal limitations, advocating for temperature-regulated current control as a more effective approach. The importance of using an electro-thermal battery model for optimal control is also emphasized. Additionally, the tutorial outlines how primary-side control can achieve these performance enhancements and discusses the development of real-time battery observers as part of digital twins to support optimal performance control. The session concludes with a summary of the proposed paradigm shift in WPT applications.
