Browsing by Subject "shipboard power systems"

Now showing 1 - 7 of 7

Application of Electromagnetic Guns to Future Naval Platforms
(IEEE, 1999-01) Walls, W.A.; Weldon, W.F.; Pratap, S.B.; Palmer, M.; Adams, D.
Designs for future naval vessels are strongly considering electric drive systems. Already employed in commercial cruise ships, electric drive offers the advantages of increased ship design flexibility, improved efficiency, reduced maintenance and allows ship prime power to be easily diverted to other electrical loads as needed. The ability to use ship prime power generation, which ranges between 40 and 150 MW depending on vessel class, for other electric loads provides the opportunity to electrify many existing functions as well as add new performance enhancing systems. The recent and ongoing emergence of electric gun and guided projectile technologies now allows very long range naval fire support functions to be evaluated for viability. In this paper, conceptual system designs for surface fire support of forces in littoral campaigns are considered. Key advantages of an EM fire support weapon over conventional technologies include reduced logistics burden and cost per round, greater lethality, shorter time of flight, improved survivability and the ability to stow more rounds. Notional mission requirements, projectile, power supply issues and ship integration issues are discussed. Also, other shipboard uses for the pulse power system required for these notional electric gun systems are also reviewed
Design and analysis of a 20 MW propulsion power train
(2004-03) Beno, J.H.; Flynn, M.M.; Hayes, R.J.; Hebner, R.E.; Jackson, J.R.; Ouroua, A.; Pichot, M.A.; Schroeder, E.; Zierer, J.J.; Weeks, D.A.
The electric ship research program at the University of Texas at Austin focuses on the development of power system technology for future electric ships. The main goal of the on-going research activity is to identify critical, high pay-off technology development needed to enable major improvement, in size and functionality, of navy ships power systems. Initial efforts were directed towards the establishment of a baseline power train which highlights various constraints and provides a basis for later optimization efforts. A 20 MW power train system was chosen for such a baseline, and all components, from fuel to propulsion motor, were considered and their impact on the whole power system assessed. The baseline design consists of a 25 MVA/3600 rpm radial flux permanent magnet generator, a 22 MVA PWM converter, and a 20 MW/150 rpm radial flux permanent magnet motor, along with the amount of fuel sized for an assumed mission profile, and the widely used LM2500 gas turbine. The analysis shows that fuel is by far the dominant component contributing to weight and volume and, consequently, overall efficiency of power train components is the most relevant parameter to reduce weight and volume. The 3600 rpm generator is the smallest component. The 150 rpm motor is the heaviest component, other than fuel, weighing close to 100 tonnes.
Effects of EM weapons requirements on the electric ship power system
(2004-06) Beno, J.H.; Ouroua, A; Flynn, M.
The electric ship research effort at the University of Texas, Center for Electromechanics, is presently focusing on the development of a comprehensive model of ship power system. The model will allow the study of various architectures and power system configurations. The power system performance is assessed under prescribed scenarios that include representative mission profiles, advanced technologies in various system components, and fault mitigation. Particular attention will be given to the interaction of EM weapons with the whole power system and their effects on system stability. The potential benefits of an auxiliary energy storage system for EM weapons will be investigated. Initial analyses results will be presented.
Electric power system concepts for integration of advanced sensor and pulsed loads in the DDG-51 class ships
(0000-00-00) Herbst, J.D.; Pish, S.P.; Jackson, J.R.; Gully, B.; Gattozzi, A.L.
Advanced weapons and sensors increase demand on the electric power systems of Navy surface combatants, driving the need for fully Integrated Power Systems (IPS) such as those found in the DDG-1000 Zumwalt class of ships. The goal of this paper is to introduce novel power system configurations that could potentially be integrated into future flights of the DDG-51 class to support expanded electric power system capability at reasonable cost. Two concepts are presented: the first addresses the need for additional power for advanced sensor systems and the second addresses the need for a more significant increase in capacity to support higher power electric loads.
An electromagnetic gun power supply as a component of an electric ship power system
(2004-12) Hebner, R.E.; Pappas, J.A; Kitzmiller, J.R; Davey, K.R; Herbst, J.D; Ouroua, A; Beno, J.H.
An electromagnetic gun provides a new component that must be integrated into the power system of an electric ship. An interesting topology for the power supply is a set of pulsed alternators with sufficient energy stored in the kinetic energy of the rotors to power the shot. In this configuration, when no shot is required, the machine topology is analogous to that of a flywheel battery used to provide ride-through capability and improve power quality in land-based power systems. This paper expands upon earlier published work showing worst case perturbation to the power system, in this approach, and the use of the pulsed alternators as high-energy active filters to improve power system performance.
Notional System Report
(Electric Ship Research and Development Consortium, 2014-06-30) Andrus, Mike; Bosworth, Matthew; Crider, Jonathan; Ouroua, Hamid; Santi, Enrico; Sudhoff, Scott; Ouroua, Hamid
The U.S. ESRDC advances power system research for shipboard systems
(IEEE, 2008-09) Schulz, N.N.; Hebner, R.E.; Dale, S.; Dougal, R.; Sudhoff, S.; Zivi, E.; Chryssostomidis, C.
In an effort to advance the research and development capabilities related to shipboard power systems, the U.S. Office of Naval Research created the Electric Ship Research and Development Consortium. This group of seven U.S. universities is working to develop near term and far term research solutions for ship power systems on the all-electric ship. This paper provides an overview of the ESRDC, its successes, resources, and activities related to education and research efforts.