IEEE Electrification Magazine - December 2017 - 72

©ISTOCKPHOTO.COM/RAMON PORTELLI

By Christophe Turpin, Benoît Morin, Eric Bru,
Olivier Rallières, Xavier Roboam, Bruno Sareni,
Marcos Garcia Arregui, and Nicolas Roux

Power for Aircraft
Emergencies
A hybrid proton-exchange membrane
H2/O2 fuel cell and ultracapacitor system.
N THE CONTEXT OF AVIATION, THIS
article looks at replacing a ram air turbine
(RAT) with a hybrid proton-exchange
membrane (PEM) hydrogen/oxygen (H2/O2)
fuel cell and ultracapacitor system, starting from a theoretical perspective. The structure we propose

I

Digital Object Identifier 10.1109/MELE.2017.2758879
Date of publication: 26 December 2017

72

I E E E E l e c t r i f i cati o n M a gaz ine / DECEMBER 2017

has two static power converters: one associated with
fuel cells and the other with ultracapacitors. The energy
management principle presented (frequency sharing)
enables two types of control. First, the converter associated with the fuel cell manages the voltage of the dc
bus, and then the converter associated with the ultracapacitors controls the high-frequency currents. Second,
the voltage of the dc bus is oppositely controlled by the
ultracapacitor converter.
2325-5987/17©2017IEEE


http://www.ISTOCKPHOTO.COM/RAMON

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