Title :
A new DC-DC converter structure for power flow management in fuel-cell electric vehicles with energy storage systems
Author :
Marchesoni, M. ; Vacca, C.
Author_Institution :
Dipt. di Ingegneria Elettrica, Univ. degli Studi di Genova, Italy
Abstract :
Modern fuel cell based electric vehicles should use energy storage devices such as batteries or supercapacitors to guarantee load leveling, assuring braking energy recovery and good performances in transient operations. To this end, converters with bidirectional power flows are needed to connect the accumulators to the DC-link of the motor drive system. In this paper, a new conversion structure for the bidirectional interfacing of two DC voltage sources with a higher voltage DC-link is presented, where only three controllable power electronic switches are needed and where the only limit is that the sum of the two DC voltages must be lower or equal than the motor drive DC-link voltage. The analysis of the converter structure, the control and modulation systems that have been developed and the obtained results are reported.
Keywords :
DC-DC power convertors; fuel cell vehicles; load flow control; load management; motor drives; supercapacitors; switching convertors; DC-DC converter; DC-link motor drive system; accumulators; batteries; braking energy recovery; converter control; converter modulation systems; energy storage systems; fuel-cell electric vehicles; load leveling; power electronic switches; power flow management; supercapacitors; transient operations; Batteries; DC-DC power converters; Electric vehicles; Energy management; Energy storage; Fuel cells; Load flow; Motor drives; Power system management; Supercapacitors;
Conference_Titel :
Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual
Print_ISBN :
0-7803-8399-0
DOI :
10.1109/PESC.2004.1355831