Seminar: ECE Faculty Candidate
Thursday
March 16
4:00 - 4:50pm
Kelley 1007
Hamid Toliyat
Professor
Advanced Electric Machines & Power Electronics
Laboratory
Department of Electrical Engineering
Texas A&M University
Flywheels Energy Storage Systems for
Land/Sea/Space Applications
This seminar covers various energy
storage systems mainly flywheels for land/sea/space applications. The flywheel
is the system component responsible for storing energy in kinetic form when spinning
at high speed. When selecting the appropriate design configuration for the
flywheel, hub performance metrics such as stored energy vs. flywheel weight,
stored energy vs. volume, or weight vs. cost can influence the overall
performance of the system. For each application a different set of performance
criteria are critical. For example, for space applications energy-vs.-weight
ratio often has the highest importance, while for the Earth-based applications
energy-vs.-volume and energy-vs.-cost ratios tend to be more significant.
Flywheels are now being designed with new advancements in rotating machinery
including non-contact magnetic bearings and permanent magnet motors/generators.
New powerful magnet materials and power electronics enable flywheels to
effectively fill the niche of short duration, high cycle life applications
where batteries and ultra capacitors are not usable. High-speed operation and
high reliability requirements limit selection of motors/generators used in
modern flywheels to brushless and windingless-rotor types. Among these,
permanent magnet (PM) machines have the most advantages, including higher
efficiency and smaller size when compared with other types of motors/generators
of the same power rating. They also exhibit lower rotor losses and lower
winding inductances, which make them more suitable for a vacuum operating
environment and the rapid energy transfer in flywheel applications. Very low
cogging torque and robust rotor construction with very low part count are
additional arguments for using PM motor/generators in flywheel applications.
Biography:
Prof. Hamid Toliyat received the B.S,
degree from Sharif University of Technology, Tehran,
Iran in 1982, the M.S.
degree from West Virginia University, Morgantown,
WV in 1986, and the Ph.D. degree from
University of Wisconsin-Madison, Madison,
WI in 1991, all in electrical
engineering. Following receipt of the Ph.D. degree, he joined the faculty of
Ferdowsi University of Mashhad, Mashhad,
Iran as an
Assistant Professor of Electrical Engineering. In March 1994 he joined the
Department of Electrical Engineering, Texas A&M
University where he is
currently E.D. Brockett professor of electrical engineering. Dr. Toliyat has
received the prestigious Cyrill Veinott Award in Electromechanical Energy
Conversion from the IEEE Power Engineering Society in 2004, Outstanding
Professor Award in 2005 from Texas A&M, TEES Fellow Award in 2004,
Distinguished Teaching Award in 2003, E.D. Brockett Professorship Award in
2002, Eugene Webb Faculty Fellow Award in 2000, and Texas A&M Select Young
Investigator Award in 1999 from Texas A&M University. He has also received
the Space Act Award from NASA in 1999, and the Schlumberger Foundation
Technical Awards in 2001 and 2000. Dr. Toliyat is an Editor of IEEE Transactions
on Energy Conversion, and was an associate editor of IEEE Transactions on Power
Electronics. He is also Chairman of IEEE-IAS Electric Machines Committee, and
is a member of Sigma Xi. He is a senior member of the Power Engineering,
Industrial Applications, Industrial Electronics, Power Electronics Societies of
the IEEE, and the recipient of the 1996 IEEE Power Engineering Society Prize
Paper Award for his paper on the Analysis of Concentrated Winding Induction
Machines for Adjustable Speed Drive Applications-Experimental Results. His main
research interests and experience include analysis and design of electrical
machines, variable speed drives for traction and propulsion applications, fault
diagnosis of electric machinery, and sensorless variable speed drives. Prof.
Toliyat has supervised more than 35 graduate students, published over 265
technical papers, raised over $3.4M in research funding, presented more than 35
invited lectures all over the world, and has 10 issued and pending US
patents in these fields. He is the author of DSP-Based Electromechanical Motion
Control, CRC Press, 2003, and the Co-Editor of Handbook of Electric Motors -
2nd Edition, Marcel Dekker, 2004. He was the General Chair of the 2005 IEEE
International Electric Machines and Drives Conference in San Antonio, Texas.
