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Wireless Power Transfer Systems: Current Issues and Future Opportunities

Monday, September 26, 2016 @ 11:00 AM - 12:00 PM

Monday September 26, 2016 at 11:00 a.m. Sheldon S. Williamson, Senior Member at IEEE, will be presenting “Wireless Power Transfer Systems: Current Issues and Future Opportunities”.

Speaker: Sheldon S. Williamson
Associate Professor and Canada Research Chair in Electric Energy Storage Systems for Transportation Electrification
Director, Smart Transportation Electrification and Energy Research (STEER) Group Advanced Storage Systems and Electric Transportation (ASSET) Laboratory
UOIT – Automotive Center of Excellence (UOIT-ACE)
Department of Electrical, Computer, and Software Engineering
Faculty of Engineering and Applied Science
University of Ontario – Institute of Technology

Day & Time: Monday, September 26, 2016
11:00 a.m. – 12:00 p.m.

Location: Ryerson, KHE 225

Contact: Maryam Davoudpour

Organizer: WIE, Magnetics, Measurement/Instrumentation-Robotics, Computer Science Department Ryerson University

Abstract: More recently, with the automotive market getting introduced to several EV models (Tesla, Leaf, Mitsubishi – for example), the need for charging them within cities, suburbs, and highways, has driven power electronics engineers towards innovative ideas to solve the future charging infrastructure problem. Plugged charging topologies have been investigated thoroughly in recent years, based on existing SAE J1772 standards for AC and DC charging, ranging from 1.5 kW to 50 kW. On the other hand, in the last five years or so, power supply and charger manufacturing companies have been seriously started looking at wireless charging as an attractive solution, to avoid physical drawbacks of wired or plugged versions of charging EVs. The high-level goals of this seminar is to focus on introducing advanced power electronics solutions for charging traction batteries and ultracapacitors using wireless technologies. Both inductive power transfer (IPT) as well as capacitive power transfer (CPT, electrostatic) techniques of wireless charging will be introduced. The major market for IPT-based wireless charging is the mass transit industry, such as electric trains, buses, and trams, in the range of 10-50 kW, while both IPT and CPT could be used for charging small utility- grade EVs (golf carts/security vehicles), in smaller sizes of 1.0 kW.

Critical issues, such as IPT transfer coil design, CPT capacitor dielectric medium/transfer plate designs, and converter topologies, will be discussed. Detailed results of finite element analysis (FEA) designs for energizer and pick-up coils will be presented. Specific emphasis is placed on reducing the effect of skin effect and proximity effect for both in-motion and static charging (for varied switching frequencies and air-gap lengths). An important aspect that will also be covered is the design of charger topologies on the secondary side of the IPT or CPT system. The challenge is to come up with 1-stage power conversion techniques, including high-frequency (HF) AC/DC rectification and DC/DC charger functionalities, with conversion efficiencies of 95% or larger.

This seminar will be particularly useful for engineers with entry-level and medium-level knowledge of power electronics and energy storage systems for electric transportation.

Biography: Sheldon S. Williamson (S’01–M’06–SM’13) received his Bachelors of Engineering (B.E.) degree in Electrical Engineering with high distinction from University of Mumbai, India, in 1999. He received the Masters of Science (M.S.) degree in 2002, and the Doctor of Philosophy (Ph.D.) degree (with Honors) in 2006, both in Electrical Engineering, from the Illinois Institute of Technology, Chicago, IL. From June 2006 to June 2014, Dr. Williamson held a tenure-track Assistant Professor position, followed by a tenured Associate Professor position in the Department of Electrical and Computer Engineering, at Concordia University, in Montreal, Canada. Dr. Williamson currently holds an Associate Professor position in the Department of Electrical, Computer, and Software Engineering, at the University of Ontario-Institute of Technology (UOIT), in Oshawa, Ontario, Canada. Since July 2015, Dr. Williamson also holds the prestigious title of NSERC Canada Research Chair in Electric Energy Storage Systems for Transportation Electrification. Dr. Williamson’s research interests include transportation electrification, electric energy storage systems, automotive power electronics, and motor drives. Dr. Williamson is a Senior Member of the IEEE and a Distinguished Lecturer of the IEEE Vehicular Technology Society.


Monday, September 26, 2016
11:00 AM - 12:00 PM
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