• A New Approach to a High Efficiency Inductive Store 

      Zowarka, R. C.; Kajs, J. P.; Pratap, S. B.; Price, J. H.; Weldon, W. F.; Weldon, J.; Pappas, J.A. (IEEE, 1991-01)
      A topology has been developed for a highly efficient inductive store suitable for pulsed-power applications. The design features high L/R ratios without having to cryogenically cool the conductors. This allows for high ...
    • A New Electromagnetic Powder Deposition System 

      Bacon, J.L.; Davis, D.G.; Pollizzi, R.J.; Sledge, R.L.; Uglum, J.R.; Zowarka, R.C. (, 1997-09)
      Existing state of the art thermal spray processes (HVOF, D-Gun, Plasma Spraying) are limited to powder velocities of about 1 km/sec because they rely on the thermodynamic expansion of gases. A new thermal spray process ...
    • A New High Current Laboratory and Pulsed Homopolar Generator Power Supply at The University of Texas 

      Floyd, J.E.; Aanstoos, T.A. (IEEE, 1984-03)
      The University of Texas at Austin is constructing a spacious facility for research in pulse power technology at the Balcones Research Center, located in north Austin. The arrangement and capacity of the facility are intended ...
    • A new strategy for management and reconfiguration of self-contained power systems 

      Davey, K.R.; Hebner, R.E. (IEEE, 2006-07)
      Power systems on naval vessels and airplanes are good examples of self-contained power systems. These types of systems are useful for testing reconfiguration, particularly ones that might be implemented continuously, not ...
    • A new strategy for representation and control of self-contained power systems 

      Davey, K.R.; Hebner, R.E. (IEEE, 2006-07)
      Power systems on naval vessels and airplanes are good examples of self-contained power systems. State of the art LEM modules and voltage sensors provide real time current and voltage data. This paper shows how that information ...
    • Nine-Phase Armature Windings Design, Test, and Harmonic Analysis 

      Jordan, H.E; Zowarka, R.C.; Pratap, S.B. (IEEE, 2005-05)
      A nine-phase armature winding was developed for a large generator. Alternative methods for interconnecting the pole-phase groups were examined. An alternate-pole connection scheme was adopted and a prototype induction motor ...
    • Nonlinear Control of a Flexible Rotor Magnetic Bearing System: Robustness and the Indefinate Model 

      Smith, R.D.; Weldon, W.F. (, undated)
      Previously published control strategies for magnetic bearings primarily focus on linear optimal control techniques. While these methods afford many advantages, conspicuously absent from the literature are detailed attempts ...
    • A novel high-speed flywheel based dc voltage source with soft handover capability 

      Flynn, M.M.; Paylan, A. (IEEE, 2005-05)
      A novel high-speed flywheel-based DC voltage source (FDCS) has recently been developed as a direct and improved energy storage substitute for chemical batteries in uninterruptible power supply (UPS) applications. Like ...
    • Numerical design of synchronous generators 

      Davey, K.R.; Gamble, B. (IEEE, 2005-08)
      High power density applications require special treatment in design optimization. Among the critical questions is how the working torque angle will change through an optimization analysis. We present a new method for ...
    • Observation and Analysis of Current Carrying Plasmas In a Railgun 

      Cook, R. W.; (IEEE, 1986-11)
      Observation of current-carrying plasma arcs driving solid projectiles in round-bore and square-bore railguns have been made with magnetic induction coils. Both free-running precursor arcs as well as projectile armature ...
    • Open series fault comparison in ac & dc micro-grid architectures 

      Estes, H.B; Kwasinski, A.; Hebner, R.E.; Uriarte, F.M.; Gattozzi, A.L. (IEEE, 2011-10)
      This paper explores empirical observations of open series fault (arc fault) testing during current interruptions. Emphasis is on dc systems, but arc behavior is also compared to that of ac systems under >quasi-equivalent> ...
    • Operating Experience with the 90-mm Railgun at CEM-UT 

      Hahne, J.J.; Hayes, R.J. (IEEE, 1993-01)
      A 90 mm×10 m-long railgun has been operated at the Center for Electromechanics at the University of Texas at Austin (CEM-UT) with great success, and several improvements were recently added. The testing has involved various ...
    • Optimization and Critical Design Issues of the Air Core Compulsator for the Cannon Caliber Electromagnetic Launcher System (CCEML) 

      Kitzmiller, J.R.; Pratap, S.B.; Aanstoos, T.A.; Cook, K.G.; Kuenast, R.A.; Murphy, B.T.; Perkins, D.R. (IEEE, 1995-01)
      The Center for Electromechanics at The University of Texas at Austin (CEM-UT) is nearing completion of the manufacturing phase of a mobile platform, compulsator (CPA) driven 30 mm ground bore equivalent rapid fire railgun ...
    • Optimization of gas turbine generator-sets for improved power density 

      Pichot, M.A.; Zierer, J.J.; Ouroua, A.; Beno, J.H. (American Society of Naval Engineers, 2006-10)
      Many future U.S. Navy ships will employ all-electric propulsion systems instead of mechanical drives. To help optimize performance of these systems, studies are under way at The University of Texas at Austin Center for ...
    • An Optimized Double Ramp Integrated Launch Package Design for Railguns 

      Kitzmiller, J.R.; Driga, M.D. (IEEE, 2003-01)
      The need to evolve and make more efficient design tools for use in complex railgun system trade studies has led to an enhanced design for a fully integrated hybrid metal contact launch package for railguns. During work on ...
    • Parameter Studies for Traveling Wave Coaxial Launchers 

      Wu, A. Y.; (IEEE, 1991-01)
      The traveling wave coaxial launcher is a complex machine that requires very extensive parameter studies to optimize. Most of previous attempts to realize hypervelocity using coaxial launchers have failed partly due to ...
    • Parametric Approach to Linear Induction Accelerator Design 

      Bresie, D. A.; Andrews, J. A.; Ingram, M. W. (IEEE, 1991-01)
      A parametric approach to defining effective accelerator designs is described. This method uses a computer optimization routine to iteratively seek out effective designs. The optimization routine is forced to search within ...
    • Permanent Magnet Bias, Homopolar Magnetic Bearings for a 130 kW-hr Composite Flywheel 

      Murphy, B.T.; Ouroua, A.; Caprio, M.T.; Herbst, J.D. (, 2004-08)
      The Center for Electromechanics at the University of Texas at Austin is developing a power averaging flywheel battery for a high speed passenger locomotive as part of the Federal Railroad Administration’s Next
    • Physical Scale Modeling to Predict Current Diffusion in Solid Armatures 

      Pappas, J. A.; Driga, M. D.; Weldon, W. F. (IEEE, 1989-01)
      Scaling laws relating current diffusion in a high-conductivity material at low velocity to current diffusion in a lower conductivity material are derived. The design of an experiment to determine the validity of the scaling ...
    • Physical Scale Modeling to Verify Energy Storage Inductor Parameters 

      Zowarka, R.C.; (IEEE, 1984-03)
      In the pulse charging and discharging of energy storage inductors, the influence of I2R heating, magnetic diffusion skin depth, and eddy current losses must be evaluated. These effects are not easily treated analytically. ...