Type of Document Master's Thesis Author Qu, Dayu Author's Email Address firstname.lastname@example.org URN etd-093099-111035 Title Emi Characterization and Improvement of Bi-Directional Dc/Dc Converters Degree Master of Science Department Electrical Engineering Advisory Committee
Advisor Name Title Lai, Jason Committee Chair Chen, Dan Y. Committee Member Huang, Alex Q. Committee Member Keywords
- electric vehicle
- bi-directional DC/DC converter
- L-type converter
- full-bridge converter
Date of Defense 1999-09-14 Availability unrestricted AbstractA worldwide awareness of the environment is accelerating fuel cell vehicle development. With respect to power electronics, special requirement is on the development of high efficiency, high voltage ratio bi-directional DC/DC converter for fuel cell energy system management.
In this paper, two bi-directional DC/DC converters, which are developed for Ford Motor Company's fuel cell vehicle, are compared from different aspects. Comparison is concentrated on the circuit topology and EMI performance. Emphasis is placed on soft-switch, hard-switch, synchronized rectification, auxiliary start-up winding and their effect on EMI performance in this kind of isolated bi-directional converter.
Comparison includes circuits analysis and test result. The EMI test setup is described. EMI measurements are given and explained. EMI solutions for bi-directional DC/DC converter are discussed. An EMI filter is designed and final test result is given.
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