• 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. ...
    • Plasma Armature Railgun Launcher Simulations at The University of Texas at Austin 

      Weeks, D. A.; Weldon, W. F.; Zowarka Jr, R. C. (IEEE, 1989-01)
      A velocity-dependent friction model that accurately predicts the losses associated with a plasma armature railgun is presented. Test results from a 1-m-long, 1.27-cm square-bore, plasma-armature railgun have been used to ...
    • Plasma Armature Railgun Launcher Simulations at The University of Texas at Austin 

      Weeks, D. A.; Weldon, W. F.; Zowarka, Jr, R. C. (IEEE, 1989-01)
      A velocity-dependent friction model that accurately predicts the losses associated with a plasma armature railgun is presented. Test results from a 1-m-long, 1.27-cm square-bore, plasma-armature railgun have been used to ...
    • Possible Errors in Measurement of Air-Gap Torque Pulsations of Induction Motors 

      Hsu, J.S.; Woodson, H.H.; Weldon, W.F. (IEEE, 1992-03)
      Measurements based on the accurately obtained air gap flux data using either the search-coil or the Hall-effect approach are not error proof. This is because even the unbalanced leakage effects can be reduced to a minimal ...
    • Power Converters for Railguns 

      Pappas, J.A.; Piccone, D.E. (IEEE, 2001-01)
      The University of Texas at Austin Center for Electromechanics (UT-CEM) has been developing power converters for use with DC railguns. Special design rules have been established and demonstrated in the construction of ...
    • Power Electronics and Controls for Air Core Compulsator 

      Wehrlen, D.J.; Lee, R.A.; Thelen, R.F. (IEEE, 1995-01)
      The Center for Electromechanics at the University of Texas (GEM-UT) has been engaged in a large scale effort to develop the power electronics and control systems required to demonstrate a multi-megawatt, full control, SCR ...
    • Power Grid for a Naval Electric Ship - AC versus DC 

      Davey, K.; Hebner, R.E. (, undated)
      The debate over the best electric grid topology for an all electric ship has provoked discussion on a wide range of topics, spanning interconnection issues, transmission losses, and power preferences of electronic components, ...
    • Power Supply Technology for Electric Guns 

      Gully, J. H.; (IEEE, 1991-01)
      Because there are multiple power supply options being developed to power electric guns, there is no single component which could become an obstacle that could limit the technology. Pulsed power supply technology is developing ...
    • Power Systems Study for Two Variable Specific Impulse Magnetoplasma Rocket Applications 

      Meintanis, E.; Bengtson, R.D.; Hebner, R.E. (American Society of Civil Engineers, 2002)
      In this study, we analyze the power storage systems needed for operational tests of a Variable Specific Impulse Magnetoplasma Rocket (VASIMR) on the International Space Station (ISS). Two tests are considered: a short-term ...
    • Predicted versus Actual Performance of a Model Scale Compulsator System 

      Kitzmiller, J.R.; Cook, K.G.; Hahne, J.J.; Hotz, T.J.; Manifold, S.M.; Pappas, J.A.; Penney, C.E.; Pratap, S.B.; Rech, B.; Thelen, R.F.; Walls, W.A.; Werst, M.D.; Zowarka, R.C. (IEEE, 2001-01)
      Performance testing of the model-scale CPA was completed at the University of Texas Center for Electromechanics. A major part of the project was the development of design and simulation codes that would accurately represent ...