Title page for ETD etd-09092002-112817

Type of Document Master's Thesis
Author Cornwell, William Lincoln
URN etd-09092002-112817
Title Switching Frequency Effects on Traction Drive System Efficiency
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Lai, Jason Committee Chair
Konrad, Charles Committee Member
Nelson, Douglas J. Committee Member
  • Voltage Source Inverter
  • Induction Motor
  • Traction Drive
  • Hybrid Electric Vehicle
Date of Defense 2002-09-06
Availability unrestricted
Energy demands are steadily increasing as the world's population continues to grow. Automobiles are primary transportation means in a large portion of the world. The combination of fuel consumption by automobiles along with the shrinking fossil fuel reserves makes the development of new more energy efficient technologies crucial. Electric vehicle technologies have been studied and are still being studied today as a means of improving fuel efficiency. To that end, this work studies the effect of switching frequency on the efficiency of a hybrid electric vehicle traction drive, which contains both an internal combustion engine as well as electric motor. Therefore improving the efficiency of the electric motor and its drive will help improve the viability of alternative vehicle technologies. Automobiles spend the majority of their operational time in the lower speed, lower torque region. This work focuses on efficiency improvements in that region. To estimate the efficiency trend, the system is modeled and then tested both electrically and thermally. The efficiency is shown to increase at lower switching frequencies. The experimental results show that there are some exceptions, but the basic trend is the same.
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  Thesis.pdf 2.47 Mb 00:11:26 00:05:52 00:05:08 00:02:34 00:00:13

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.