• Salvo Fire Experiments Using a 0.60 Caliber Electromagnetic Launcher 

      Fuller, R.L.; Kitzmiller, J.R.; Pratap, S.B.; Thelen, R.F. (IEEE, 1993-01)
      A laboratory-based, small caliber electromagnetic launcher and compulsator power supply is being developed. The goal is to accelerate three 32 g masses to 2 km/s at a 10 Hz firing rate. A 0.60-caliber, series augmented, ...
    • Scaling Analysis of the Electromagnetic Powder Deposition Gun 

      Uglum, J.R.; Bacon, J. L.; Davis, D.G.; Polizzi, R.J.; Sledge, R.L.; Zowarka, R.C. (, 1997-09)
      The electromagnetic powder deposition (EPD) system employs high velocity gas flow to accelerate powder material to conditions required for high strength plating. The gas flow, however, is not continuous; rather it consists ...
    • Self Excitation of Iron Core Homopolar Generators 

      Perkins, D.E.; Nalty, K.E.; Walls, W.A. (IEEE, 1986-11)
      In the interest of reducing homopolar generator (HPG) auxiliary requirements, a self-excited field coil for pulsed duty, iron-core HPG has been developed and tested at the Center for Electromechanics at The University of ...
    • The Self-Excitation Process in Electrical Rotating Machines Operating in Pulsed Power Regime 

      Driga, M.D.; Pratap, S.B.; Walls, W.A.; Kitzmiller, J.R. (IEEE, 2001-01)
      The self-excitation process in pulsed air-core rotating generators is fundamental in assuring record values of power density and compactness. This paper analyzes the conditions for the self-excitation process in pulsed ...
    • Sensor Developments for Compulsator-Driven Railgun Systems 

      Penney, C.E.; Hotz, T.J.; Hahne, J.J. (IEEE, 2003-01)
      As the technologies of rotating power supplies and thyristor switches advance, new methods of measuring various signals must be developed. The University of Texas at Austin Center for Electromechanics (UT-CEM) has developed ...
    • Shaft Signals Corresponding to Cracked Rotor Bars of Induction Machines 

      Hsu, J.S.; Gully, J.H. (, undated)
      Ratings of induction machines range from tens of thousands horsepowers to fractional horsepowers. Unexpected downtime of large Induction motors, such as those used in power plants, can be very costly. Cracked rotor bars ...
    • Shaft Signals of salient-Pole Synchronous Machines for Eccentricity and Shorted Field Coil Detections 

      Hsu, J.S.; Stein, J. (IEEE, 1994-01)
      Relationships between shaft signal and eccentricities of salient-pole synchronous machine are Studied. The magnitude and the thickness of shaft-signal loci Reflect steady and dynamic eccentricities. Harmonic components of ...
    • Ship component optimization 

      Davey, K.R.; (, 2004-08)
      This document outlines an optimization to define the size of the components in the power train of an electric ship, specifically one appropriate for an 80 MW Destroyer. The objective is to minimize the volume of the system, ...
    • Shock and vibration testing of an AMB supported energy storage flywheel 

      Hawkins, L.A.; Murphy, B.T.; Zierer, J.; Hayes, R. (The Japan Society of Mechanical Engineers, 2003)
      Shock and vibration testing of an Active Magnetic Bearing (AMB) supported energy storage flywheel is presented. The flywheel is under development at the University of Texas-Center for Electromechanics (UT-CEM) for application ...
    • Simplified Morton Effect Analysis for Synchronous Spiral Instability 

      Murphy, B.T.; Lorenz, J.A. (American Society of Mechanical Engineers, 2010-08)
      A simplified analytical approach for modeling the synchronous instability phenomenon known as the Morton effect is presented. The analysis is straightforward and easily applied to any rotor supported on fluid film bearings. ...
    • Simulating mode transitions during breakdown in liquids 

      Murphy, B.T.; Hebner, R.E.; Kelley, E.F. (IEEE, 2011-06)
      The primary new information from this investigation is the simulation of a transition from one streamer mode to another during propagation. The transition is characteristic of experimental data, but has not heretofore been ...
    • Simulation and Field Verification of Vehicle-Loop Interactions 

      Petit, V.; Hebner, R.E.; Grady, M.; Datta, S.; Carroll, J.; Sathyamangalam, B. (, undated)
      Inductive sensors are used worldwide for traffic control. These sensors consist of a loop or loops of wire embedded in the pavement. The loops are connected to electronic control circuits that convert changes in loop ...
    • Simulation and Predicted Performance of the Balcones GEDI Experiment 

      Wu, A. Y.; Driga, M. D.; Woodson, H. H.; Zowarka, Jr, R. C. (IEEE, 1986-11)
      The guided electromagnetic defense interceptor (GEDI) railgun launcher system is powered by six Balcones homopolar generators (BHPG), each of which stores 10 MJ in kinetic energy. Each BHPG is connected to a coaxial inductor ...
    • A Simulation-Based Design Study for a Locomotive Electric Power System 

      Zhang, F.; Longoria, R.G.; Thelen, R.; Wardell, D. (ELECTRIMACS-2002, 2002)
      This paper presents a model and simulation for a conceptual locomotive power system consisting of a gas turbine driven synchronous alternator coupled to a rectifier – dc link – variable frequency inverter configuration. ...
    • Single and Multiphase Compulsator System Architectures: A Practical Comparison 

      Kitzmiller, J.R.; Pappas, J.A.; Pratap, S.B.; Driga, M.D. (IEEE, 2001-01)
      The Center for Electromechanics at the University of Texas at Austin (UT-CEM) has designed, built, and tested three generations of iron-core and air-core compensated pulsed alternators (CPA). These include the iron core, ...
    • Single Shot Switch Performance on the Cannon Caliber Electromagnetic Gun Program 

      Hotz, T.J.; Penney, C.E.; Kitzmiller, J.R.; Werst, M.D. (IEEE, 1999-01)
      Analyzer (DMA) tests. Also documented in this paper will be the results from specialized viscoelasticity tests performed on representative composite windings to determine preload loss versus time, temperature, and stress. ...
    • Small Caliber Mobile EML 

      Wehrlen, D. J.; Gully, J. H. (IEEE, 1986-11)
      The Center for Electromechanics at the University of Texas at Austin (CEM-UT) is conducting a feasibility and conceptual design study of a vehicle mounted small bore railgun. The study is funded by the U.S. Army Armament ...
    • Solid-State Switch Development for High Power Pulse Discharge Control 

      Thelen, R. F.; Perkins, D. E.; Price, J. H. (IEEE, 1990-06)
      High-power electronics are being applied at the Center for Electromechanics at the University of Texas at Austin to control the launching of compulsator-driven railgun loads. The design, fabrication, and testing of a 200 ...
    • Some Benefits of Pulsed Alternators as Electromagnetic Gun Power Supplies on Power Systems for Future Electric Ships 

      Hebner, R.E.; Pappas, J.A.; Kitzmiller, J.R.; Davey, K.R.; Herbst, J.D.; Ouroua, A.; Beno, J.H. (, 2006-12)
      An electromagnetic gun provides a new component to be integrated into the power system of an electric ship. Electromagnetic guns have been fired successfully using either capacitors, inductors, or rotating machines to store ...
    • SPEAR Coilgun 

      Bresie, D.A.; Bacon, J.L.; Kennington, K.S.; Ingram, S.K.; Weeks, D.A. (IEEE, 1995-01)
      The SPEAR, a development in coilgun technology, passively launches a projectile with a solenoidally wound armature. This paper describes the SPEAR, its electromagnetic operation, its construction, and the tests performed ...