Opportunities in Plug-In Charging of Electric Vehicles

Date: 11:00am, September 2, 2016
Location: EE Conference Room  (MUDD 1306)
Speaker:   Prof.  Alireza Khaligh, University of Maryland at College Park

Abstract: Power electronics has emerged as an enabling technology in deployment of next generation of electrified transportation systems. There are many power electronic converters in a plug-in electric car, including an onboard charger, propulsion machine inverter, energy storage bidirectional converter, and auxiliary load converter. The demand for higher efficiency, higher power density, specific power and better thermal management poses additional challenges for these power electronic converters to accommodate. This presentation will put forward some of the current research areas, which are being pursued in the Maryland Power Electronics Laboratory (MPEL) with the emphasis on integrated power electronic converters for plug-in electric vehicles.

In particular, this presentation will focus on developing highly efficient isolated onboard chargers for plug-in electric vehicles. In this presentation a new technique to track the maximum efficiency point of a LLC converter over a wide range of the battery State-of-Charge (SoC) will be introduced. Using this technique, efficiency improvement of 2.1% at the full load condition and 9.1% at the lightest load condition is demonstrated. This corresponds to overall charger efficiency improvement of 1.6% at full load and 6.7% at light load. Furthermore, this presentation will outline an integrated and bidirectional converter, which combines the functionalities of an onboard charger and auxiliary load converter. This integration increases the gravimetric and volumetric power densities of such converters by 50%, while significantly enhancing the operation efficiency in light and medium loads.

Biography: Alireza Khaligh is an Associate Professor at the Electrical and Computer Engineering (ECE) Department and the Institute for Systems Research (ISR) in the University of Maryland at College Park (UMD).

Prof. Khaligh is also currently an Expert at the Energy, Power, Control and Networks (EPCN) Program at the Electrical, Communications and Cyber Systems (ECCS) Division at the U.S. National Science Foundation.

Prof. Khaligh is a recipient of various awards and recognitions including the 2016 Junior Faculty Outstanding Research Award from Clark School of Engineering at UMD, 2015 Inaugural ISR Junior Faculty Fellowship from the Institute for Systems Research at UMD, 2013 George Corcoran Memorial Award from the ECE Department at UMD, (2015, 2013 & 2009) Best Vehicular Electronics Award from IEEE Vehicular Electronics Society, and 2010 Ralph R. Teetor Educational Award from Society of Automotive Engineers. He is a Distinguished Lecturer of the IEEE Vehicular Technology Society (VTS) and IEEE Industry Applications Society (IAS).

Prof. Khaligh was the General Chair of the 2013 IEEE Transportation Electrification Conference and Expo (ITEC), the Flagship Conference of IEEE in Transportation Electrification. He was also the General Chair of the 2016 IEEE Applied Power Electronic Conference and Expo (APEC), the Premier Event in Applied Power Electronics. 

Hosted by Professor Matthias Preindl 

500 W. 120th St., Mudd 1310, New York, NY 10027    212-854-3105               
©2014 Columbia University