Special Session

Keynote Speakers


Keynote Speaker 01——Wei-Jen Lee, PhD, PE


IEEE Industry Applications Society For Research Enhancement and Career Development
Wei-Jen Lee, PhD, PE
Professor and Director
Energy Systems Research Center
The University of Texas at Arlington

Professor Lee received the B.S. and M.S. degrees from National Taiwan University, Taipei, Taiwan., and the Ph.D. degree from the University of Texas, Arlington, in 1978, 1980, and 1985, respectively, all in Electrical Engineering.
In 1986, he joined the University of Texas at Arlington, where he is currently a professor of the Electrical Engineering Department and the director of the Energy Systems Research Center. 
He has been involved in the revision of IEEE Std. 141, 339, 551, 739, 1584, and 3002.8 development. He is the President Elect of the IEEE Industry Application Society (IAS) and an editor of IEEE Transactions on Industry Applications and IAS Magazine. He is a member of IEEE Fellow Committee. He is the project manager of IEEE/NFPA Collaboration on Arc Flash Phenomena Research Project.
Prof. Lee has been involved in research on Utility Deregulation, Renewable Energy, Arc Flash Hazards and Electrical Safety, Smart Grid, MicroGrid, Industrial Internet of Things (IIoT) and Virtual Power Plants (VPP), AI for Load, Price, and Wind Capacity Forecasting, Power Quality, Distribution Automation, Demand Response, Power Systems Analysis, Short Circuit Analysis and Relay Coordination, Distributed Energy Resources, Energy Storage System, PEV Charging Infrastructure Design, AMI and Big Data, On Line Real Time Equipment Diagnostic and Prognostic System, and Microcomputer Based Instrument for Power Systems Monitoring, Measurement, Control, and Protection. He has served as the primary investigator (PI) or Co-PI of over one hundred funded research projects with the total amount exceed US$17 million dollars. He has published more than one hundred and seventy-five journal papers and two hundred ninety conference proceedings. He has provided on-site training courses for power engineers in Panama, China, Taiwan, Korea, Saudi Arabia, Thailand, and Singapore. He has refereed numerous technical papers for IEEE, IET, and other professional organizations.
Prof. Lee is a Fellow of IEEE and registered Professional Engineer in the State of Texas.


Abstract: The Industry Applications Society (IAS) is the sixth largest society within the IEEE. There are more than 10000 members within the IAS. As a transnational organization, IAS is interested in advancement of the theory and practice of electrical and electronic engineering in the development, design, manufacture and application of electrical systems, apparatus, devices and controls to the processes and equipment of industry and commerce; promotion of safe, reliable and economic installations; industry leadership in energy conservation and environmental, health, and safety issues; creation of voluntary engineering standards and recommended practices; and the professional development of its membership. For sustainable development, IAS has devoted significant amount of resources and efforts for its members, especially to young professional and students. The Chapters and Membership Department (CMD) of IAS has launched many programs to stimulus the participation of young professional and students.
This presentation discusses the available resources and opportunities within the IAS to enhance your research and career development. 


Keynote Speaker 02——Liuchen Chang


Introduction to IEEE Power Electronics Society

 Dr. Liuchen Chang

University of New Brunswick, Fredericton, Canada

Liuchen Chang received B.S.E.E. from Northern Jiaotong University in 1982, M.Sc. from China Academy of Railway Sciences in 1984, and Ph.D. from Queen’ University in 1991. He joined the University of New Brunswick in 1992 and is a professor in Electrical and Computer Engineering. He was the NSERC Chair in Environmental Design Engineering during 2001-2007, and was the Principal Investigator of Canadian Wind Energy Strategic Network (WESNet) during 2008-2014. He is the Vice President for Conferences and President-Elect of the IEEE Power Electronics Society. He has been a committed volunteer for IEEE since early 1990’s.

Dr. Chang was a recipient of CanWEA R.J. Templin Award in 2010, Innovation Award for Excellence in Applied Research in New Brunswick in 2016, and PELS Sustainable Energy Systems Technical Achievement Award in 2018. He is a fellow of Canadian Academy of Engineering (FCAE). He has published more than 370 refereed papers in journals and conference proceedings. Dr. Chang has focused on research, development, demonstration and deployment of renewable energy based distributed generation systems and direct load control systems.


Abstract :The Power Electronics Society (PELS) remains one of the fastest growing societies of the Institute of Electrical and Electronics Engineers (IEEE). For over thirty years, PELS has facilitated and guided the development and innovation in power electronics technologies. These technologies encompass the effective use of electronic components, the application of circuit theory and design techniques, and the development of analytical tools toward efficient conversion, control, and condition of electric power.

Dr. Liuchen Chang, the VP for Conferences (2017-2020) and President-Elect (serving 2021-2022) of PELS, will present an introduction to the Power Electronics Society. IEEE PELS's core purpose is to foster technological innovation and excellence in power electronics for the benefit of humanity. Liuchen will present the organizational structure and operation of PELS, its membership and activities across wide regions, conference portfolios, PELS publications and other products, and its technical committees. Liuchen will provide an insight into the young professional and student activities and their significance to PELS. Liuchen will also provide an overview of a few PELS initiatives including Empower a Billion Lives (a global competition in Energy Access) and PELS international technology roadmaps.


Keynote Speaker 03——Jian-Xin SHEN


Applications and Multi-Physics Design of High Speed Permanent Magnet Synchronous Motor

Prof. Jian-Xin SHEN
Zhejiang University, China

Jian-Xin Shen received the B.Eng. and M.Sc. degrees from Xi'an Jiaotong University, Xi'an, China in 1991 and 1994, respectively, and the Ph.D. degree from Zhejiang University, Hangzhou, China in 1997, all in electrical engineering. 
He was with Nanyang Technological University, Singapore (1997-1999), the University of Sheffield, Sheffield, U.K. (1999-2002), and IMRA Europe SAS, U.K. Research Centre, Brighton, U.K. (2002-2004). Since 2004, he has been a full professor with Zhejiang University. 
Prof. Shen has authored more than 270 technical papers, and is the inventor of more than 40 patents. He received 8 paper awards from IEEE and international conferences. He was granted the Nagamori Award with recognition of his contribution to permanent magnet electrical machines and high speed electrical machines. He was the general chair of the ICEMS'2014, IEEE VPPC'2016 and IEEE SCEMS'2018 conferences. 
His main research interests include topologies, control and applications of permanent magnet machines and drives, and renewable energies. 
More information about Prof. J. X. Shen can be seen on https://person.zju.edu.cn/en/jxs.


Abstract: In this speech, some typical applications of high speed permanent magnet synchronous motors (PMSM) are introduced. Optimal design of high speed large PMSM is then presented, taking a 350kW and 13.5krpm non-salient PMSM as an example.
Firstly, it is critical to determine a proper level of PM-excited flux linkage in the armature windings, so that for a given high speed motor the supply voltage can be fully utilized, the motor armature current can be minimized, and the power factor can be enhanced. Of course all of these are associated with proper control strategies, whilst the motor must have sufficient potential capability to cooperate with the control strategies. In other words, the motor itself and the control method should be systematically designed.
Specific considerations on electromagnetic design will presented. For example, PM rotor structure need be designed to provide sufficient strength against centrifugal force and meanwhile to generate the required level of PM flux, whilst stator winding structure should be designed with appropriate inductance, since high operation frequency could cause high armature impedance. Clearly, high armature impedance may deteriorate the motor power factor, but may also enhance the field modulation capability by armature currents, hence, compromise is essential. On the other hand, during electromagnetic design some special losses such as extra winding ohmic loss and rotor eddy current loss due to high speed operation should be particularly suppressed, as these losses may cause high temperature rise and may even damage the motor.
Rotor stress due to high speed operation need be considered critically. Examples of reducing local over-stress in the rotor will be given, whilst such techniques often harm the motor electromagnetic performance. Therefore, compromise is required again. 
Also, design of rotor dynamics is important, in that rotor resonance must be avoided. Basically it is preferable to make a short rotor with a thick shaft to increase the critical resonant frequency. But this will usually enlarge the rotor diameter and consequently increase the rotor stress. 
On the other hand, high speed machines enjoy the merit of high power density, but also suffer from the problem of high loss density. Hence, thermal design is particularly required. Winding impregnation or encapsulation can be employed, whilst liquid cooling or forced air cooling can be rather effective, hence, single- or even double-phase fluid dynamics computation is required, coupling with thermal analysis. Furthermore, some measures to enhance the fluid dynamics such as introducing extra air channels in the stator core will affect the motor electromagnetic performance.
Clearly, various physical fields are deeply coupled in the high speed large power motors, thus, compromises must be made. Multi-physics analysis and design are not only essential, but also usually need be iterated, so as to achieve an overall satisfactory performance.


Keynote Speaker 04——Tobias Geyer

High Power Electronics: Control Challenges and Opportunities

Tobias Geyer
ABB Medium-Voltage Drives, Switzerland

Tobias Geyer (M’08 - SM’10) received the Dipl.-Ing. and Ph.D. degrees in electrical engineering from ETH Zurich, Zurich, Switzerland, in 2000 and 2005, respectively, and the Habilitation degree in power electronics from ETH Zurich, Zurich, Switzerland, in 2017.

After his Ph.D., he spent three years at GE Global Research, Munich, Germany, three years at the University of Auckland, Auckland, New Zealand, and eight years at ABB’s Corporate Research Centre, Baden-Dättwil, Switzerland. There, in 2016, he became a Senior Principal Scientist for power conversion control. He was appointed as an extraordinary Professor at Stellenbosch University, Stellenbosch, South Africa, from 2017 to 2020. In 2020, he joined ABB’s medium-voltage drives business as R&D platform manager of the ACS6000/6080. 

He is the author of 35 patent families and the book “Model predictive control of high power converters and industrial drives” (Wiley, 2016). He teaches a regular course on model predictive control at ETH Zurich. His research interests include medium-voltage and low-voltage drives, utility-scale power converters, optimized pulse patterns and model predictive control. 
Dr. Geyer is the recipient of the 2017 First Place Prize Paper Award in the Transactions on Power Electronics, the 2014 Third Place Prize Paper Award in the Transactions on Industry Applications, and of two Prize Paper Awards at conferences. He is a former Associate Editor for the Transactions on Industry Applications (from 2011 until 2014) and the Transactions on Power Electronics (from 2013 until 2019). He was an international program committee vice chair of the IFAC conference on Nonlinear Model Predictive Control in Madison, WI, USA, in 2018. Dr. Geyer is a Distinguished Lecturer of the Power Electronics Society in the years 2020 and 2021.


Abstract: Power converters in the Megawatt range are becoming an integral part of the modern power system. Examples include HVDC transmission systems, renewable energy generation, large variable-speed drives, STATCOMs, rail grid interties and pumped hydro storage systems. These high power converters are operated at very low switching frequencies, require fast control loops and must often adhere to tight limits on their harmonic distortions. The typically used linear control methodology with pulse width modulation often impairs the achievable performance. This talk provides an industrial perspective on high power electronics, summarizes their challenges and proposes novel control techniques to address some of them.  Two pilot installations are discussed in detail including a 45 MW variable speed drive compressor system. 



Special sessions


Special Speaker 01: 

Non-intrusive load monitoring and residential electricity plan recommendations
Dr. Ke Meng
Senior Lecturer,
School of Electrical Engineering and 
Telecommunications, The University of New 
South Wales
Email address: ke.meng@unsw.edu.au

Dr Meng received his Ph.D. degree from the University of Queensland, followed by post-doctoral appointments at the Department of Electrical Engineering, the Hong Kong Polytechnic University. In 2012, he transferred to the Centre for Intelligent Electricity Networks at the University of Newcastle as an associate lecturer and was promoted to the research academic in late 2012. In 2015, he joined the University of Sydney as a lecturer in the School of Electrical and Information Engineering. And then he joined the School of Electrical Engineering and Telecommunications in the University of New South Wales as a senior lecturer in energy system in 2018.

Dr Ke Meng has 10 years’ experience in the design and development of 3GW renewable energy and battery projects in Australia, including system modelling and analysis, renewable generation connection studies and compliance testing. He is a senior member of IEEE, serves as editor of International Transactions on Electrical Energy Systems, member of Journal of Modern Power Systems and Clean Energy editorial board, and member of Electric Power Components & Systems editorial board.


Abstract: This seminar will introduce a data analytics platform developed based years’ research. With the non-intrusive load monitoring, a key smart grid services enabling technique, the platform provides estimated break down of electricity usage by appliance category. It also allows customers to compare all generally available electricity plans, considering details such as solar feed-in tariffs, discounts and incentives, key terms and conditions.


Special Speaker 02:

The Future for Plasma Discharges: Mechanisms and Novel Applications
Dr. Qing Xiong
Tenured Associate Professor
College of Electrical Engineering, Chongqing University
Email address: qingxiong@cqu.edu.cn 

Dr. Xiong received his Bachelor degree from the College of Electrical Engineering at Southwest Jiaotong University (China) at 2007. Afterwards, he started joint doctoral study and received PhD degrees from both the Department of Applied Physics in Ghent University (Belgium) at 2012, and the College of Electrical & Electronic Engineering in Huazhong University of Science & Technology (China) at 2013, in the field of plasma discharges. 
In 2013 he joined the Chongqing University (China) as a researcher supported by the Hundred Talents Program. He is also a research member in the State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University. From November 2013 to July 2014, he was a visiting scholar in the Cold Plasma Diagnostics and Application Lab. at the Department of Mechanical Engineering, University of Minnesota (Twin Cities Campus), USA. His research interests include atmospheric pressure plasma discharges, advanced optical diagnostics, plasma interactions with liquids and solids, and novel applications of plasma discharges in energy and material science. He has been co-authored more than 60 publications, and since 2015 the total citations of his work have achieved to 1596 with h-idex 22 and i10-idex 36 by GoogleScholar. 


Abstract: The application of plasma discharge has assumed a critical, although often hidden, place in many manufacturing processes. Many products that depend on plasma treatments are ubiquitous in modern societies. Integrated Circuits for computers and cells phones are only possible by plasma processing. Surface treatments and modifications of plastics and textiles improve printing, dyeing, adhesion, and biocompatibility properties, as well as either increase or decrease wettability. Other properties such as antimicrobial, self-cleaning, scratch-resistant, and even self-repairing properties are possible by plasma treatments. Plasma-assisted combustion, higher energy efficiencies for cars and for aircraft engines. Plasma thrusters and actuators provide completely new approaches for propulsion and maneuverability of planes and spacecraft. Plasmas provide a highly efficient cleaning way of exhaust pollutant gases, etc. Plasma technology has contributed significantly to the economic prosperity of industrialized societies. In this talk a broad review of the success of plasma technologies in various fields will be presented. The behind important mechanisms will be discussed together with several potential novel plasma applications in biomedicine and energy field. 


Special Speaker 03:

Recent development of Novel DC-biased Current Flux modulated machines
Shaofeng Jia
Post-doctor, Associate Professor, 
School of Electrical Engineering,
Xi 'an Jiaotong University, China
IEEE Member

Shaofeng Jia (S’14–M’17) was born in Shaanxi Province, China. He received the Bachelor Engineering degree from Xi’an Jiaotong University, Xi’an, China, in 2012, and the Ph.D. degree from the Huazhong University of Science and Technology, Wuhan, China, in 2017, both in electrical engineering. He was a visiting scholar at the University of Sheffield, UK. He is currently an Associate Professor with the School of Electrical Engineering, Xi’an Jiaotong University. He was named one of the top ten young scholars of Xi 'an Jiaotong University in 2019 and was included in the 2019 Forbes Young Talent Under 30 List. He has so far published more than 65 IEEE technical papers. His research interests include design and control of novel electrical machines and magnetic gear.


Abstract: With the rapid development of rail transit, ship electrification, multi-electric/all-electric aircraft, robots, new energy vehicles, and drones, electric machines play a more and more important role nowadays. Flux-modulated machines (FMMs) have been gaining more and more research attention thanks to their extremely super-high torque density. The most remarkable feature of FMMs is that the number of the stator pole pairs and the rotor pole pairs are not equal. With the permeance modulation effect of the iron poles, the mechanical speed of the machine is reduced, and the output torque is increased. The majority of the existing FMMs adopt the traditional pure sinusoidal current. In this presentation, the recent academic research on novel DC-biased current PM and reluctance FMMs is presented. Topology evolution and comparison, operation principle, slot/pole combination relationship, electromagnetic performance, and experimental validation are described.  


Special Speaker 04:


Development of Electromagnetic Forming Technology at Wuhan National High Magnetic Field Center
Dr. Quanliang Cao

Associate Professor
Wuhan National High Magnetic Field Center & School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
Email address: quanliangcao@hust.edu.cn

Dr. Cao received his Bachelor degree in 2008 and Ph.D degree in 2013, both from School of Electrical and Electronic Engineering, Huazhong University of Science and Technology. Currently, he is an associate professor and doctoral supervisor in the Wuhan National High Magnetic Field Center & School of Electrical and Electronic Engineering, Huazhong University of Science and Technology. His research interests focus on the object manipulation using magnetic fields, including electromagnetic forming, magnetic soft robot, and magnetic separation. He has published more than 20 SCI-indexed papers as the first author or corresponding author, and applied for more than 30 national invention patents.


Abstract: Electromagnetic forming is a high-speed forming technology that uses Lorentz forces to achieve plastic forming of metallic workpieces, showing great potential in the manufacture of lightweight tubes and sheet metals. However, its industrial application is still quite limited due to bottlenecks such as the mechanical stability and thermal stability of tool coils during high-energy or high-cycle discharges, and the poor controllability of Lorentz forces in the existing forming process. To solve these issues, our team has previously developed a new electromagnetic forming technology at Wuhan National High Magnetic Field Center, that is, space-time-controlled multi-stage pulsed magnetic field forming and manufacturing technology. In the past five years, we have focused on the development of multi-coil electromagnetic systems and forming process of light alloy components related to this forming technology, which will be summarized in this talk based on the recently reported work.


Special Speaker 05:

Utilization of Increased Degrees of Freedom in Multiphase Drive

Zicheng Liu

Associate professor

 Huazhong University of Science and Technology (HUST)

Zicheng Liu (M’18) was born in Shandong, China, in 1989. He received the B.S. degree in Hydropower Engineering from Huazhong University of Science and Technology (HUST), Wuhan, China, in 2011, and the Ph.D. degree in Electrical Engineering from Tsinghua University, Beijing, China, in 2016. During Otc. 2014 to Mar. 2015, he was a Visiting Student at Purdue University, West Lafayette, IN, USA. During Jun. 2016 to Sep. 2018, he was a postdoc researcher at Beijing Jiaotong University, Beijing, China. He is currently an associate professor at HUST. His research interests include multiphase motor control systems and transportation electrification.


Abstract: With the high penetration of power electronic converters in the motor drive applications, the stator phase number of electric machines can break the three-phase constraint set by the power grid. Actually, with the phase number grows, the degrees of freedom for the motor drive will increase. As a result, many advantages will emerge, such as reduced per phase power rating, improved reliability and increased modulation degrees of Pulse Width Modulation (PWM). This talk shows different types of multiphase machines and drive systems, and discusses the utilization of increased degrees of freedom in the coordination of multiple stator phases, fault-tolerant control strategy, optimized PWM techniques in the multiphase drive applications.


Special Speaker 06:

Introduction of the Auxiliary Functions of an Inductive Power Transmission System
Qianhong Chen

College of Automation Engineering, Nanjing University of Aeronautics and Astronautics
Email address: chenqh@nuaa.edu.cn 

Dr. Chen received the B.S., M.S., and Ph.D. degrees in electrical engineering from Nanjing University of Aeronautics and Astronautics, Nanjing, China, in 1995, 1998 and 2001, respectively. In 2001, she joined the Teaching and Research Division of the Faculty of Electrical Engineering at Nanjing University of Aeronautics and Astronautics, China, and is currently a professor with the Aero-Power Sci-Tech Center in the College of Automation Engineering. From April 2007 to January 2008, she was a Research Associate in the Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Hong Kong, China. She has published more than 100 papers in international journals and conferences. Her research interests include soft-switching dc/dc converters, application of integrated-magnetics, and contactless resonant converters.


Abstract: Inductive power transmission technology (IPT), which transfers power through magnetic coupling, is safer, more flexible and more convenient, compared to plug-in power transfer solutions. It has fund more and more applications, such as personal electronic devices, wearable/implantable electronics, electric vehicles, and so on. A lot of effort has been put to improve the performance of the power transmission, including efficiency, controllability and misalignment tolerance. In addition to the power transmission issues, how to solve the safety and the positioning problems in practical applications is also an urge problem for an IPT system. Without positioning system, it is very different to satisfy the allowable misalignment range for a wireless coupler. The existence of foreign objects may cause overheating and safety problems. To solve abovementioned problems, auxiliary functions including coil positioning, foreign and living object detections have been specified as an essential part for some IPT applications, for example, a commercialized wireless EV charging system.
In this presentation, the auxiliary function requirements of an inductive power transmission system as well as the related technologies will be given. Firstly, a brief introduction of the introducing reason and the requirements of the auxiliary functions, will be presented. Secondly, we will discuss the feasible solutions and the main issues of the position technologies for IPT systems. And then, several foreign object and living object detection methods will be introduced as well as their limitations. Lastly, the information security issues will be mentioned. 


Special Speaker 07:

A Real-Time Non-invasive Neuromodulation Modality with Transcranial Magneto-Acousto-Electric Stimulation

Zhang Shuai


Vice Dean of the College of Electrical Engineering, Hebei University of Technology

Email address: zs@hebut.edu.cn

Zhang Shuai is a professor in the State Key Lab of Reliability and Intelligence of Electrical Equipment, and vice dean of the College of Electrical Engineering, and vice director of the Institute of Biomedical & Health Engineering at Hebei University of Technology. He is the deputy chairman of the Bioelectrical Professional Committee in China Electrotechnical Society. He has managed almost 10 national and provincial research projects. And He has also organized and hosted international and national conferences as the Session Chair or Track Chair. He has been an Editorial Committee member of Journal of Life Science Instrumentation in China.

Dr. Zhang received his Ph. D. degree from the College of Electrical Engineering at Hebei University of Technology (China) at 2009. He acted as a visiting associate in the Department of Biomedical Engineering at University of Minnesota (Twin Cities) from 2013 to 2014. His research interests include bioelectromagnetic technology, neural engineering, bioelectromagnetic Imaging, Electrical Impedance Tomography, magnetoacoustic tomography with magnetic induction, etc. 


Abstract: Non-invasive brain neuromodulation is indispensable to the study of brain function. It has also been proven effective for treating some neurological disorders. As a novel method for brain neuromodulation, Transcranial Magneto-Acousto-Electric Stimulation (TMAES) does not needs urgery and genetic alteration, it also owns higher spatial resolution and deeper penetration than other non-invasive methods such as transcranial direct current stimulation and transcranial magnetic stimulation. It has not been explored before although the intramembrane mechanoelectrical effect plays an important role in the firing activity of neuron. Membrane capacitance of neuronchanges under the function of ultrasonic radiation force. In this talk, we will show a multiscale model, and the neuron firing behaviors based on this model under the Magneto-Acousto-Electric effect are studied. How TMAES modulates neural firing activity will also be shown. The numerical experiment shows that parameter values of TMAES determine the current density, resulting in different firing behaviors and different neuron firing patterns. The results further highlight the role of Magneto-Acousto-Electric effect in neural excitation. They help illuminate sub-threshold and novel physical cellular effects, and may be useful in finding better methods for  real-time non-invasive neural control.


Special Speaker 08:

Overview of High-frequency Wireless Power Transfer and Its Design Aspects

Dr. Chengbin Ma

Associate Professor (Tenured)

The University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University

Email address: chbma@sjtu.edu.cn

Lab: http://umji.sjtu.edu.cn/lab/dsc/ 

Dr. Chenggbin Ma received the B.S. degree in industrial automation from East China University of Science and Technology, Shanghai, China, in 1997, and the M.S. and Ph.D. degrees in electrical engineering from The University of Tokyo, Tokyo, Japan, in 2001 and 2004, respectively. From 2004 to 2006, he was an R&D Researcher with the Servo Motor Laboratory, FANUC Limited, Japan. Between 2006 and 2008, he was a Postdoctoral Researcher with the Department of Mechanical and Aeronautical Engineering, University of California, Davis, USA. In 2008, he joined the University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, China, where he is currently an Associate Professor of Electrical and Computer Engineering. His research interests include battery and energy management, wireless power transfer, dynamics and motion control, and wide applications in electronic devices, electric vehicles, microgrids, smart grids, etc.

Dr. Ma was the recipient of many teaching and research awards at Shanghai Jiao Tong University, such as Teaching and Education Award in 2020 and Koguan Top Ten Research Group Award in 2014. He also received Research Excellence Award from AirFuel Alliance, USA, in 2019. He is an Associated Editor for the IEEE Transactions on Industrial Informatics and IEEE Journal of Emerging and Selected Topics in Industrial Electronics. He serves as Delegate of Energy Cluster, and Chair of Shanghai Chapter, IEEE Industrial Electronics Society.


Abstract: Wireless charging or wireless power transfer (WPT) provides a convenient and viable solution without the need for major breakthrough in today's battery technology, especially in terms of energy density. At present, WPT operating in the high-frequency band, such as at 6.78 MHz, is widely regarded as a promising candidate technology for the mid-range transfer of a medium amount of power. Physically, a higher operating frequency improves the spatial freedom of power transfer and also makes it possible to develop a more compact and lighter WPT system. At the same time, due to the high-frequency operation, circuit-level complexity and multiple objectives in the actual MHz WPT systems, system-level analysis and design are particularly important for achieving high performance (e.g., high efficiency, low noise, and robustness) of a final system. In this speech, the main power conversion topologies are first briefly reviewed and compared; then, taking the Class E^2 topology as an example, a systematic methodology is explained to model and design a complete MHz WPT system; finally, the methodology is further extended to multiple-receiver MHz WPT systems, where the robustness of operation is particularly emphasized. The developed modeling and design methods are based on the impedance analysis of each component from the final load, rectifier, coupling coils, to power amplifier. Therefore, this methodology itself, i.e., the design concept, is universal for MHz WPT systems using other representative circuit topologies.


Special Speaker 09:

Development and Challenges in Very High Frequency Power Conversion

Yueshi Guan

Associate Professor

Harbin Institute of Technology

Email address: guanyueshi@hit.edu.cn

Dr. Guan received the B.S., M.S. and PH.D. degrees in electrical engineering from Harbin Institute of Technology, China, in 2013, 2015 and 2019, respectively. Since 2019, he has been an associate professor with the Department of Electrical and Electronics Engineering, Harbin Institute of Technology. His research interests are in the areas of high frequency and very high frequency converters, single-stage AC/DC converter, and LED lighting systems. 

He has authored more than 50 conference and journal papers. He received Nomination Award of Young Engineer Award of PCIM Asia Conference in 2019, the Second Prize Paper Award from IEEE Transactions on Power Electronics, as well as Best Paper awards of ICEMS 2019, SPEED 2019, ITEC Asia-Pacific 2017. He is also the correponding guest editor of JESTIE and served as the special session chair of IEEE ICEMS 2019, IEEE ECCE-Asia 2020.


AbstractWith the fast development of power electronics, there is an increasing need for small volume, high power density and fast response power conversion equipment in the fields of lighting, data center power system, wireless power transfer, industrial robot and other applications. Improving the operating frequency is the fundamental strategy to reduce the value, volume of passive components, which can effectively reduce the system volume. With the development of wide bandgap (WBG) devices, the operating frequency can be pushed up to tens of MHz, where the power electronic conversion technology comes into the era of very high frequency (VHF). However, many challenges come with the tremendous increment of operating frequency, such as large switching loss, large driving loss and large magnetic component loss, which investigate and overcome in recent years. In this talk, the development and challenges of VHF power converters will be presented, including the components, topologies, and driving methods. 


Special Speaker 10:

Radiated Emission Prediction of SMPS Based on Field-Circuit Co-Simulation

Yan Wei

Associate Professor

School of Electrical and Automation Engineering, Nanjing Normal University

Email address: 61197@njnu.edu.cn 

Dr. Yan received his Bachelor degree from the School of Math and Physics at Nanjing University of Information, Science & Technology at 2008. And he received his Master degree from the School of Electrical and Automation Engineering at Nanjing Normal University at 2011. Afterwards, he started doctoral study and received PhD degree from the School of Physics and Technology at Nanjing Normal University at 2014. 

In 2014, he joined Nanjing Normal University as a lecturer. From November 2016 to October 2020, he was a postdoctor in the Key Laboratory of Advanced Technology for Small and Medium-sized UAVs, Nanjing University of Aeronautics and Astronautics. From July 2017, he is an associated professor and the Deputy Director of Jiangsu Engineering Key Lab of Electrical Equipment and Electromagnetic Compatibility, Nanjing Normal University. He is also the communication committee member of National Radio Interference Standardization Technology A Subcommittee, member of National Integrated Circuit Electromagnetic Compatibility Standard Working Group, member of Electromagnetic Compatibility Committee of China Power Supply Society and obtain the Jiangsu Innovation & Entrepreneurship Talent Technology Program. His research interests include electromagnetic interference generated by devices and ICs, electrostatic discharge (ESD) immunity, electrical fast transient burst (EFT) immunity, Surge immunity, very fast transient overvoltage (VFTO) mechanism, electromagnetic environment effects (E3) and nanothermal ablation of tumor. He has been co-authored more than 100 publications and obtains 13 national invention patents. 


AbstractSwitching model power supplies (SMPS) are widely used in applications ranging from small consumer electronics to large industrial equipment. Most SMPS employ switching devices that rapidly and repeatedly change states producing high-frequency electromagnetic interference (EMI) due to the large di/dt and dv/dt in the circuit waveforms. The prediction of far-field EMI for SMPS can not only shorten the production cycle and reduce the measurement cost, but also can provide a very valuable reference for the EMC design of SMPS. In this talk a radiation prediction method of SMPS is proposed to predict the noise level of SMPS in the standard measurement of the 3m semi-anechoic chamber, and divides the SMPS into power cables, PCB and shell. The power cable serves as a radiation antenna, the PCB circuit containing the switching device and the digital chip serves as the radiation source, and the shell serves as a measure to eliminate the radiation of the PCB. First, the shell of the SMPS is used to eliminate the influence of the radiation caused by the PCB on the estimation accuracy. Then, the excitation signal of the radiation is obtained through full-circuit simulation. In circuit simulation, intelligent algorithms and other technologies will be employed to establish high-frequency equivalent circuit models of related devices. Finally, the improved antenna model is employed to achieve the final radiation prediction.







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