Title :
A zero-voltage-switching bidirectional battery charger/discharger for the NASA EOS satellite
Author :
Sable, Dan M. ; Lee, Fred C. ; Cho, Bo H.
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
The design of a pulse-width-modulated (PWM) zero-voltage-switching (ZVS) bidirectional converter is presented. The bidirectional converter employs a buck and boost topology using FET devices for both switches. ZVS is obtained by selecting the power stage inductance so that the switches always turn on when the MOSFET body diode is conducting. A four-module, multiphase topology is employed to significantly reduce the input and output ripple current. Besides obtaining high efficiency and light weight, the converter is also shown to possess excellent small-signal characteristics. It is applied to the design of the battery charger/discharger for the NASA EOS (Earth Observing System) satellite. Both theoretical and experimental results are presented
Keywords :
artificial satellites; battery chargers; insulated gate field effect transistors; power convertors; pulse width modulation; Earth Observing System satellite; FET devices; MOSFET body diode; NASA; PWM; battery discharges; bidirectional battery charger; bidirectional converter; buck and boost topology; high efficiency; multiphase topology; ripple current; small-signal characteristics; zero-voltage-switching; Batteries; Earth Observing System; FETs; Inductance; Pulse width modulation; Pulse width modulation converters; Switches; Switching converters; Topology; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1992. APEC '92. Conference Proceedings 1992., Seventh Annual
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0485-3
DOI :
10.1109/APEC.1992.228354
