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Advanced Mobile Generator Set
Team
Dr. Leon M. Tolbert
Description
The U.S. Department of Defense has initiated a program to upgrade and develop
enhanced tactical power systems to provide reliable electrical power in the
battlefield. One aspect of this program is for the development of advanced
mobile generator sets in the medium power (5-60kW) range. These future
generator sets are to be portable, lightweight systems that are electronically
controlled, signature suppressed, and capable of operating on DF-2/JP-8 fuels
in extreme environmental conditions.
This generator set uses an internal combustion diesel engine to drive a radial-gap
permanent magnet alternator at variable speed. The speed of the engine
is determined from a user selectable interface that for a given load and
ambient thermal conditions controls the engine to run at its most efficient
operating point. It is also possible to control the engine to run where
it is most audibly quiet, at its least-polluting operating point, or at its
most reliable, stiffest point such that it is less sensitive to load transients.
The variable frequency, variable voltage produced by the permanent magnet
alternator is diode-rectified to dc voltage, and an inverter is used to produce
selectable frequency, controllable ac voltage. The power conversion
system also incorporates a bi-directional dc-dc converter that can charge
24V batteries that are used to start the IC engine and to power auxiliary
loads. The bi-directional converter can also draw power from the batteries
to help maintain the dc link during severe load transients. The design
of this new generator set offers additional flexibility by being lighter,
smaller, and more fuel efficient than a conventional fixed-speed gen-set.
Fig 1. PM alternator mounted to gen-set engine.
Fig 2. Proof of concept 7.5kW-rated gen-set.
Related publications and presentations
L. M. Tolbert, W. A. Peterson, T. J. Theiss, M. B. Scudiere,
"Gen-Sets," IEEE Industry Applications Magazine, March/April 2003, pp.
48-54.
L. M. Tolbert, W. A. Peterson, M. B. Scudiere,
C. P. White, T. J. Theiss, J. B. Andriulli, C. W. Ayers,
G. Farquharson, G. W. Ott, L. E. Seiber, "A
Bi-Directional DC-DC Converter with Minimum Energy Storage
Elements," IEEE Industry Applications Society Annual Meeting,
October 13-17, 2002, Pittsburgh, PA, pp. 1572-1577.
L. M. Tolbert, W. A. Peterson, M. B. Scudiere,
C. P. White, T. J. Theiss, J. B. Andriulli, C. W. Ayers,
G. Farquharson, G. W. Ott, L. E. Seiber, "Electronic Power
Conversion System for an Advanced Mobile Generator Set," IEEE
Industry Applications Society Annual Meeting, September 30 - October
4, 2001, Chicago, Illinois, pp. 1763-1768.
Contact Informations
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