IEEE Electrification Magazine - December 2017 - 24

Figure 18. The eTaxi technology was demonstrated at the PAS (2013) using a nonengine-powered A320 airplane.

protection algorithms are applied to the entire EDS,
not only to the WACU. Both the control and the protection are embedded in the software on the DSP
platform. For future applications, a multilevel inverter can be considered for reduced losses, easier EMI,
and power quality handling. This could result in
reliability reduction.
xx
The installation of the TM on the landing gear presents
substantial challenges from an environmental perspective, including mechanical stress, thermal stress,
and potential contamination. Therefore, a complete
encapsulation of all of the electrical components is
required. The available installation volume is limited,
which required a solution with a radially mounted
cooling fan. A broad parametric study of different
machines has been performed to support various
installation options. A higher-speed TM results in
lower weight and volume, which should be considered
for future implementations.
xx
The interfacing cables with the EMI shield present a
lighter design than unshielded cables and increased
filtering in the components.
xx
Self-cooling with dedicated fans for large components
such as the ATRU, the WACU, and the TM is probably
the most efficient method because the distance
between the components is large and an active liquid
cooling system is not justifiable.
The work reflected in this article, including the PAS
demonstration of the eTaxi, is a significant step toward
the implementation of the system in service.

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

For Further Reading
A. Teo, K. Rajashekara, J. Hill, and B. Simmers, "Examination
of aircraft electric wheel drive taxiing concept," presented at
the Soc. Automotive Engineers Power Syst. Conf., Seattle,
WA, 2008.
F. Re, "Assessing environmental benefits of electric aircraft
taxiing through object-oriented simulation," Soc. Automotive
Engineers Int. J. Aerosp., vol. 5, no. 2, pp. 503-512, 2012.
H. Oyori and N. Morioka, "Power management system
for the electric taxiing system incorporating the more electric architecture," presented at the SAE AeroTech Congr.
Exhibition, Montréal, Canada, 2013.
C. Kjelgaard, "Runway taxiing goes green," Aerosp. Amer.,
Feb. 2014.
T. M. Jahns, "Flux-weakening regime operation of an interior permanent-magnet synchronous motor drive," IEEE Trans.
Ind. Appl., vol. IA-23, no. 4, pp. 681-689, July 1987.
A. Emadi, B. Fahimi, and M. Ehsani, "On the concept of
negative impedance instability in the more electric aircraft
power systems with constant power loads," Soc. Automotive
Eng. J., pp. 689-699, 1999.
A. B. Jusoh, "The instability effect of constant power loads,"
in Proc. IEEE Nat. Power Energy Conf., Kuala Lumpur, Malaysia,
2004, pp. 175-179.
E. Ganev, W. Warr, and K. Chen, "Composite ac-to-dc power
converters for more electric architectures," presented at the
Soc. Automotive Engineers Aerosp. Syst. Technol. Conf.,
Cincinnati, Ohio, 2014.

Biography
Evgeni D. Ganev (evgeni.ganev@honeywell.com) is with
Honeywell Aerospace, Torrance, California.

Table of Contents for the Digital Edition of IEEE Electrification Magazine - December 2017