MHz Wireless Power: Topologies, Magnetics, Safety and Synchronisation
Pr. Paul D. Mitcheson
Professor at Electrical and Electronic Engineering Department, Imperial College London, U.K.
Abstract: MHz wireless power can provide an alternative to kHz solutions and in some applications can lead to lighter weight solutions and greater misalignment tolerances. In this talk I will cover the basics of MHz wireless power, including circuit topologies, and then move on to look at some of the prerequisites for making it work in a real world environment, including safety and synchronisation for active rectification. I will also cover some applications that the Imperial spinout, Bumblebee Power, is targeting.
Speaker's Bio: Paul D. Mitcheson (Senior Member, IEEE) received the M.Eng. degree in electrical and electronic engineering and the Ph.D. degree in micropower motion-based energy harvesting for wireless sensor networks from Imperial College London, London, U.K., in 2001 and 2005, respectively.,He is currently a Professor of electrical energy conversion with Control and Power Research Group, Electrical and Electronic Engineering Department, Imperial College London. His research interests include energy harvesting, power electronics, and wireless power transfer to provide power to applications in circumstances where batteries and cables are not suitable. His research has been supported by the European Commission, Engineering and Physical Sciences Research Council, and several companies.,Prof. Mitcheson is a Fellow of the Higher Education Academy and was on the Executive Committee of the U.K. Power Electronics Centre. He was the General Co-Chair of IEEE Wireless Power Week in 2019 in London, U.K.
DYNAMIC CAPACITIVE WIRELESS CHARGING OF ELECTRIC VEHICLES
Dr. Khurram Khan Afridi
Associate Professor of Electrical and Computer Engineering at Cornell University
Abstract: Currently dynamic wireless charging systems for electric vehicles are inductive, which use magnetic field coupling between conducting coils to transfer energy to moving vehicles. An alternative approach is capacitive wireless charging, which uses electric field coupling between conducting plates to transfer energy. Capacitive wireless charging systems have potential advantages over inductive systems because of the relatively directed nature of electric fields, which reduces the need for electromagnetic field shielding. Furthermore, because capacitive systems do not use ferrites, they can be operated at higher frequencies, allowing them to be smaller and lighter. However, there are also challenges associated with capacitive wireless charging. Using examples from my group’s research on dynamic capacitive wireless charging, this talk will highlight the opportunities and challenges in this area.
Speaker's Bio: Khurram Afridi is an Associate Professor of Electrical and Computer Engineering at Cornell University. He received the BS degree in electrical engineering from Caltech (1989), and SM (1992) and PhD (1998) degrees in electrical engineering and computer science from MIT. His research interests are in power electronics and energy systems incorporating power electronic controls, with a focus on high frequency power electronics and wireless power transfer. Prior to joining Cornell, he was an Assistant Professor and the Goh Faculty Fellow at the University of Colorado (CU) Boulder (2014-2018), a visiting faculty at MIT's EECS Department (2009-2014), and the Chief Operating Officer (2000-2010) and Chief Technology Officer (1997-2000) of Techlogix. From 2004 to 2008 he led the development of LUMS School of Science and Engineering (SSE) as Project Director. He has also worked for JPL, Lutron, Philips, and Schlumberger. He is an associate editor of the IEEE Journal of Emerging and Selected Topics in Power Electronics, was the Technical Program Committee (TPC) chair for the IEEE Wireless Power Transfer Conference (WPTC) 2015, and was the co-TPC chair for the IEEE Wireless Power Week (WPW) 2021. He received the Carnation Merit Award from Caltech (1988), the BMW Scientific Award from BMW AG (1999), the Werner-von-Siemens Chair for Power Electronics from LUMS SSE (2008), the Dean’s Professional Progress Award from CU Boulder (2015), the ECEE Department Outstanding Overall Performance Award from CU Boulder (2016), the National Science Foundation CAREER Award from NSF (2016), and the College of Engineering Research Excellence Award from Cornell (2021). He holds nineteen U.S. patents and is co-author of five IEEE prize papers.
Introduction to Electromagnetic Compatibility and Electromagnetic Field Safety Aspects in Near Field Wireless Power Transfer Systems
Pr. Mauro Feliziani
Professor or Electrical Engineering, University of L’Aquila, Italy
Abstract: The aim of the talk is to present the main aspects of electromagnetic compatibility (EMC) and electromagnetic field (EMF) safety of near-field wireless power transfer systems. The basic principles of EMC and EMF safety will be briefly explained. WPT systems used for wireless battery charging are intentional sources of time-varying magnetic fields that can be very large for high-power WPT applications. A major concern is therefore the compliance of magnetic fields with EMC and EMF safety standards and regulations. Traditional mitigation techniques such as shielding cannot be applied without degrading the performance of the WPT. The characterization of the magnetic field in critical applications such as automotive is presented. Innovative mitigation techniques are then illustrated. Some examples of typical EMC and EMF safety problems are provided in terms of conducted and radiated emissions and dosimetric analysis, respectively.
Speaker's Bio: Mauro Feliziani (M’91-SM’00) received the Laurea Degree in Electrical Engineering from Sapienza University of Rome, Rome, Italy, in 1983. From 1987 to 1994 he was with Sapienza University as a Researcher (1987-1992), and Associate Professor (1992-1994). In 1994 he joined the University of L’Aquila, Italy, as Full Professor of Electrical Engineering. He is the author or co-author of more than 200 peer reviewed papers published in the fields of Electromagnetic Compatibility (EMC) and in electromagnetic field numerical computation. His current research interests include Wireless Power Transfer and Electromagnetic Field Safety. Prof. Feliziani received the Best Paper Award from the IEEE Transactions on Industry Applications - Electrostatics Process Committee 1995, from the EMC Europe Symposium 2000, Bruges, Belgium, and from Wireless Power Week conference, London, UK, 2019. He was also co-author of: Best Student Paper at the IEEE International Symposium on EMC, Honolulu, USA, 2007; Second Best Student Paper at the BEMS Annual Meeting, Cancun, Mexico, 2006; Best Poster Presentation at the IEEE CEFC 2014, Annecy, France. He received the 2020 Kanda Award for the paper with highest citations among all the IEEE Transactions on Electromagnetic Compatibility papers published in the last 5 years (2015-2019), and the 2020 IEEE EMC Society Technical Achievement Award. From 1995 to 2000, he was Associate Editor of the IEEE Transactions on Electromagnetic Compatibility. He was the Guest Editor of a Special Issues of the IEEE Transactions on Magnetics, May 2003; COMPEL, 2008; Energies, 2018; Energies, 2020. Currently he is an Associate Editor of “Electrical Vehicles” in Energies and an Academic Editor for Wireless Power Transfer (Cambridge-Hindawi) journal. In 1994 he was co-founder of EMC Europe Symposium. He was the General Chair of the EMC Europe Symposium, Sorrento, Italy, in 2002, and of the EMC Europe Workshop, Rome, in 2005. He was the Technical Program Committee Chair of EMC Europe 2012, Rome, Italy. He was the President of the International Steering Committee of the EMC Europe organization in 2012-2015. He was the General Chair of the EMC Europe Symposium 2020, Virtual Conference. He was professor of the pioneering University course “Electromagnetic Compatibility” at Sapienza University of Rome, 1991 – 1997. Currently he teaches “Fundamentals of Electrical Engineering” and “Electromagnetic Field (EMF) Safety” at the University of L’Aquila.
Novel Rectifier Design for far field WPT
Pr. Naoki Shinohara
Professor at Research Institute for Sustainable Humanosphere (RISH) , Kyoto University
Abstract: Under preparation.
Speaker's Bio: Naoki Shinohara received the B.E. degree in electronic engineering, the M.E. and Ph.D (Eng.) degrees in electrical engineering from Kyoto University, Japan, in 1991, 1993 and 1996, respectively. He was a research associate in Kyoto University from 1996. From 2010, he has been a professor in Kyoto University. He has been engaged in research on Solar Power Station/Satellite and Microwave Power Transmission system. He was IEEE MTT-S Distinguish Microwave Lecturer (2016-18), and is IEEE AdCom member (2022-2024), IEEE MTT-S Technical Committee 25 (Wireless Power Transfer and Conversion) former chair and member, IEEE MTT-S MGA (Member Geographic Activities) Region 10 regional coordinator, IEEE WPT Initiative Member, IEEE MTT-S Kansai Chapter TPC member, IEEE Wireless Power Transfer Conference founder and Steering committee member, URSI commission D chair, international journal of Wireless Power Transfer (Hindawi) executive editor, the first chair and technical committee member on IEICE Wireless Power Transfer, Japan Society of Electromagnetic Wave Energy Applications adviser, Space Solar Power Systems Society vice chair, Wireless Power Transfer Consortium for Practical Applications (WiPoT) chair, and Wireless Power Management Consortium (WPMc) chair. His books are “Wireless Power Transfer via Radiowaves” (ISTE Ltd. and John Wiley & Sons, Inc., “Recent Wireless Power Transfer Technologies Via Radio Waves (ed.)” (River Publishers), and “Wireless Power Transfer: Theory, Technology, and Applications (ed.)” (IET), and some Japanese text books of WPT.
Smart radiating architectures for energy-aware wireless power transfer
Dr. Diego Masotti
Associate Professor University of Bologna, Italy
Abstract: In wireless power transfer (WPT) applications the weakest contribution to the overall link efficiency is the effective selection of the zone to be powered. Hence, the need for smart transmitting architectures is strong. In this talk, two promising families of highly-reconfigurable arrays are presented: first, time-modulated arrays (TMAs) are considered as a powerful tool for selective WPT, through their peculiar sideband radiation phenomenon; frequency-diverse arrays (FDAs) are, then, proposed as a smarter solution, able to focus the beam in range, too, thus avoiding the illumination of unwanted targets.
Speaker's Bio: Diego Masotti (M’00, SM’16) received the Ph.D. degree in electric engineering from the University of Bologna, Italy, in 1997. In 1998 he joined the University of Bologna where he now serves as an Associate Professor of electromagnetic fields. From 2021 he has the role of coordinator of the Telecommunications Engineering Master Degree course. His research interests are in the areas of nonlinear microwave circuit simulation and design, with emphasis on nonlinear/electromagnetic co-design of integrated radiating subsystems/systems for wireless power transfer and energy harvesting applications. He authored more than 70 scientific publications on peer reviewed international journals and more than 140 scientific publications on proceedings of international conferences. Dr. Masotti serves in the Editorial Board of Electronic Letters, of the Hindawi journal of Wireless Power Transfer, of IEEE Access, and is a member of the Paper Review Board of the main Journals of the microwave sector
An overview of the wireless power market. Where we are and where we are heading.
Dinesh Kithany
Founder & Chief Analyst, Wireless Power & Power Supplies Wired & Wireless Technologies (WAWT)
Abstract: Wireless power technology is on the brink of getting mainstream status, as set to be offered as a standard feature, but with much-needed technological advancement. The reach of the wireless power technology is expanding beyond smartphones, to wider application markets covering other mobile devices, wearables, appliances, computing, smart home, medical, industrial, robotics, automotive, e-mobility, telecom, and retail sectors. While low frequency induction-based technology has already gained adoption across billions of devices, next-generation wireless power solutions that include low-frequency induction and resonance; high-frequency resonance and NFC Charging; ultra-high frequency ‘distance’ wireless charging based on radio frequency (RF), infrared (IR), or ultrasonic (US) technology are being developed to cater to wider needs and use-cases.
Speaker's Bio: Dinesh Kithany, a well-established technology expert, is a Founder and Chief Analyst at Wired & Wireless Technologies (WAWT), a strategic technology analyst and consultancy firm, specializing in wireless power and power supplies industry. Prior to founding WAWT, Dinesh was the lead industry analyst on wireless power and the power supply industry with IHS Markit/Informa. He is one of the most sought-after analysts in the industry today. Dinesh has 26+ years of experience, of which past 11 years have been in technology sectors, including smart home, smart appliances, connectivity, robotics and drones, interface battleground, wireless power, power supplies and EV charging infrastructure. It’s safe to say, he is passionate about research and delivering insights. Dinesh has helped wide profile of businesses grow at an extraordinary pace with his expertise and strategic advice. He is widely recognized as a key industry thought-leader. He is a regular invitee to speak at key industry conferences, trade shows and events worldwide, including CES, IFA, CABA, ITRI, PCIM, Electronica, APEC and at industry conferences held by Wireless Power Consortium (WPC), NFC Forum, Wireless Communications Alliance (WCA), AirFuel Alliance (AFA) and Wireless Power Week (WPW). Be free to reach him out by email at dinesh.kithany@wawt.tech or on LinkedIn/Twitter at dineshkithany.
Wireless Charging: Coming to an EV Near You
Dr Morris Kesler
Chief Technology Officer Witricity Corporation
Abstract: The shift to electrification in the transportation sector is real and accelerating. Sales of EVs are increasing in numbers and as a percentage of vehicles sold, especially in China and Europe. This trend is predicted to accelerate with 5x growth in just the next 3 years. A key question is how all of these vehicles will be charged. While much effort is being put into building out networks of fast DC charging (>50 kW) along highway corridors, over 90 percent of charging occurs at home or work at more practical Level 2 charge rates. Wireless charging is now a real option for keeping the growing number of EVs charged and ready to drive. In fact, the first automakers are now offering wireless charging as a factory installed option, and in a recent survey, EV buyers overwhelmingly said they would prefer wireless charging over popular upgrades such as premium audio systems, park assist, and acceleration performance. In this talk we will discuss the requirements and challenges for EV wireless charging systems, look at some current systems, and explore where the technology is headed.
Speaker's Bio: Dr. Morris Kesler is the Chief Technology Officer at WiTricity Corporation where he leads research and development activities in wireless power technology. He joined WiTricity in 2007 and has served as Chief Engineer and vice president of research and development. Prior to joining WiTricity, he worked at start-up companies developing unique optical communication and sensing systems and high-speed, long haul optical transport systems. Dr. Kesler also worked at the Georgia Tech Research Institute where he led research programs in electromagnetic scattering, antenna arrays, novel antenna structures and photonic band-gap materials. He holds over 100 patents and has published over 40 technical journal and conference papers. He holds B.S., M.S., and Ph.D. degrees from the Massachusetts Institute of Technology in Electrical Engineering and Computer Science.
