5th IEEE International Future Energy Electronics Conference (IFEEC 2021)

Advances in Wireless Power Transfer Technology

Prof. Udaya K Madawala
The University of Auckland, New Zealand

Short Biography of Prof. Madawala:

Udaya K. Madawala graduated with a B.Sc. (Electrical Engineering) (Hons) degree from The University of Moratuwa, Sri Lanka in 1987, and received his PhD (Power Electronics) from The University of Auckland, New Zealand in 1993 as a Commonwealth Doctoral Scholar. At the completion of his PhD, he was employed by Fisher & Paykel Ltd, New Zealand, as a Research and Development Engineer to develop new technologies for motor drives. In 1997 he joined the Department of Electrical and Computer Engineering at The University of Auckland and, at present as a Full Professor, he focuses on a number of power electronics projects related to energy and wireless power transfer systems for EVs and V2X applications.

Udaya is a Fellow of the IEEE and a Distinguished Lecturer of the IEEE Power Electronic Society (PELS), and has over 30 years of both industry and research experience in the fields of power electronics and energy. He has served both the IEEE Power Electronics and Industrial Electronics Societies in numerous roles, relating to editorial, advisory, conference, technical committees and chapter activities. Currently, Udaya is an Associate Editor for IEEE Transactions on Power Electronics, and a member of both the Administrative Committee and Membership Development Committee of the IEEE Power Electronics Society. He was the General Chair of the 2nd IEEE Southern Power Electronics Conference (SPEC)- 2016, held in New Zealand, and is also the Chair of SPEC Steering Committee. Udaya, who has over 300 journal and conference publications, holds several patents related to wireless power transfer (WPT) and power converters, and is a consultant to industry.

Dr. Yeran Liu,
The University of Auckland, New Zealand

Short Biography of Dr. Liu:

Yeran Liu (S’17, M’20) received B.Sc. and Ph.D. degree in electrical engineering from Southwest Jiaotong University, Chengdu, China, in 2015 and 2020, respectively, where he is currently working as a Postdoctoral Researcher. From 2018-2019, he was a visiting Ph.D. student at the Department of Electrical and Computer Engineering, The University of Auckland, Auckland, New Zealand. His research interests include modeling and optimal control for bi-directional and dynamic wireless power transfer systems.

Abstract:
Wireless power transfer (WPT) systems, based on inductive power transfer (IPT) technology, that enable electrical power transfer from a supply to a load without the need for physical contacts are now used in many applications. Such WPT applications range from transcutaneous power transfer in mW for the supply of energy to implanted medical devices to ship to shore power transfer in MW for electric ferry battery charging. This tutorial covers the advances in IPT based WPT technology, and it is expected to be appealing to those who have interests in WPT technology as well as those who are already working in this area. Theory, modelling and control concepts of both uni- and bi-directional WPT systems are presented using design examples and analyses as appropriate. The tutorial focuses particularly on the bi-directional wireless power transfer (BD-WPT) technology that is developed for V2X applications, and presents its advances in relation to both stationary and dynamic wireless EV charging. The solutions that are proposed to mitigate the problems associated with grid-interfacing, pad-misalignment, efficiency, synchronization, power quality and optimal control are discussed with design examples. The modelling and control approach of each concept is demonstrated through real-time simulations.

High Power Density Electric Machine Drive Designs with Wide Bandgap Devices

Prof. Jin Wang
The Ohio State University, United States

Short Biography of Prof. Wang:

Jin Wang (IEEE Fellow) received his Ph.D. degree from Michigan State University, East Lansing, in 2005. From Sept., 2005 to Aug. 2007, he worked at the Ford Motor Company as a Core Power Electronics Engineer. He joined the Ohio State University in 2007 and currently serves at a full professor. His research interests include wide bandgap power devices and their applications, high-voltage and high-power converter/inverters, integration of renewable energy sources, and electrification of transportation.

Dr. Wang received multiple teaching and research awards including the Nagamori Award for his work on Wide Bandgap Power Electronics based motor drives in 2020, IEEE Power Electronics Society Richard M. Bass Young Engineer Award in 2011 and the National Science Foundation’s CAREER Award in 2011. Dr. Wang has over 200 peer-reviewed journal and conference publications and 9 patents.

Dr. Yousef Abdullah,
Kuwait University, Kuwait

Short Biography of Dr. Abdullah:

Yousef Abdullah (IEEE Member) received the B.S degree in electrical engineering from Kuwait University in 2013. He received the M.S. and PhD degrees in 2016 and 2020 respectively from the Ohio State University. In 2020, he joined Kuwait University as an assistant Professor at Kuwait University. His main research interests include power electronics applications of WBG devices, electro-magnetic interference, motor drives and dc arcs.

Abstract:
The demands being place upon high performance high power density electric machine drive systems continues to grow as multiple industry sectors look to cut costs and improve power density and efficiency. For this reason, researchers and engineers have been working on wide bandgap (WBG) based power electronics circuits to meet the immediate needs of industry and satisfy future requirements.
The following tutorial provides an in-depth look of challenges and status or WBG motor drives, covering topics on both circuit level and system level, which include gate drive design, circuit layout, reflective wave, thermal design, EMI, leakage current, and insulation stress to motor windings with high dv/dt PWM. Two case studies, one on a 1.8 kVA integrated GaN based motor drive and the other on 7 kV 1 MVA SiC based motor drive, will be used as examples during the discussion.
The tutorial caters to professionals at the intermediate level. Audience members should be aware of basic power electronics devices and circuits and be interested in more recent developments. The following is the outline of the tutorial.

Power Semiconductor Filtering Technology

Prof. Henry Shu-hung Chung
City University of Hong Kong, Hong Kong

Short Biography of Prof. Chung:

Professor Henry Shu-hung Chung received the B.Eng. and Ph.D. degrees in electrical engineering from the Hong Kong Polytechnic University, Kowloon, Hong Kong, in 1991 and 1994, respectively. He is currently Dean of Students, Chair Professor of the Department of Electrical Engineering, and Director of the Centre for Smart Energy Conversion and Utilization Research, City University of Hong Kong. He is a Fellow of the Institute of Electrical and Electronics Engineers (IEEE). His current research interests include renewable energy conversion technologies, lighting technologies, smart grid technologies, and computational intelligence for power electronics systems. He has edited one book, authored eight research book chapters, and over 460 technical papers including 220 refereed journal papers in his research areas, and holds 80 patents. He is currently Associate Editor of the IEEE Transactions on Power Electronics and the IEEE Journal of Emerging and Selected Topics in Power Electronics. He was Editor-in-Chief of the Letters section of the IEEE Transactions on Power Electronics in 2014-2018. He has received numerous industrial awards for his invented energy saving technologies. He is recipient of IEEE PELS R. David Middlebrook Achievement Award 2021. He was Chair of the Technical Committee of the High-Performance and Emerging Technologies, IEEE Power Electronics Society in 2010-2014.

Dr. Chung-Pui Tung,
City University of Hong Kong, Hong Kong

Short Biography of Dr. Tung:

Chung-Pui Tung (Member, IEEE) received the B.Eng. degree in computer engineering and the Ph.D. degree in power electronics from the City University of Hong Kong, in 2014 and 2020, respectively. He is currently a Postdoctoral Researcher of CSCR with the City University of Hong Kong. His current research interests include the design of power converter topology, power factor correction, stability analysis of power converters, active filtering techniques, motor control, WBG device applications, and LED driving topology. Dr. Tung was the recipient of the HKIE Outstanding paper award for young engineers/researchers 2015, Hong Kong Institution of Engineers, for his research outputs on active filtering techniques for switching mode power supply.

Abstract:

Power electronics has become so pervasive and embedded in our daily lives. By 2030, more than 80% of electrical energy will be processed by some forms of power electronic systems. Main aims of power electronic systems are to control, convert, and condition electrical power flow from one form to another through the use of solid-state electronics. Regardless of application, a power electronic system or subsystem comprises three key sections: input filter, high-frequency switching network, and output filter. The switching network is the main power processing unit that manipulates power from the input to the output with low power dissipations in the switching devices. The input filter is used to prevent unwanted noise generated by the switching network from getting into the source, and assure compliance with regulatory electromagnetic compatibility standards, while the output filter is used to pass wanted electrical output form and attenuate unwanted noise to the load. Both filters are made up of passive components.

As practical switching devices and passive components are non-ideal, major amount of power losses in the system is in the conduction and switching losses of the switching network, and the ohmic and magnetic core losses of the filters. Although recent advances in new and emerging materials, device technologies, and network topologies have resulted in reducing the losses of switching devices and increasing the operating frequency for reducing the filter size, the filter sections still occupy considerable space and constitute a major part of the total power loss.

The ever-increasing density of power electronic systems is straining designers’ abilities to squeeze space for the filters without sacrificing performance. However, there have been no significant enhancements in the filter structure and design in today’s power electronic systems, as compared to the conventional approach. The filter section will become a key limiting factor in advancing the power density and performance of the future power electronic systems. The speaker will share a filtering technology, named “Power Semiconductor Filter (PSF)”, as a substitute for passive input filters. Performances of different types of converters with the PSF will be presented.