• Balcones Homopolar Generator Power Supply 

      Gully, J. H.; Hildenbrand, D. J.; Weldon, W. F. (IEEE, 1989-01)
      A review is presented of the Balcones homopolar generator power supply (BHPGPS) project, which is intended to provide insight into the pros and cons of the design decisions and operating philosophy planned for the system. ...
    • Bearing Loads in a Vehicular Flywheel Battery 

      Murphy, B. T.; Beno, J. H.; Bresie, D. A. (Society of Automotive Engineers, Inc., 1997-02)
      Radial and axial rotor support bearings are critical elements in flywheel batteries for vehicle applications. This paper discusses the quantification of bearing loads required for the development of optimal bearing designs, ...
    • Brush/Slip Ring Current Collector Performance and Anomalies During Compulsator Commissioning 

      Hahne, J.J.; Kitzmiller, J.R.; Penney, C.E. (IEEE, 2001-01)
      During recent tests associated with a model scale compulsator development program at The University of Texas at Austin Center for Electromechanics (UT-CEM), the performance of severe duty trailing arm brush current collectors ...
    • BUS High Current Battery Model 

      Kajs, J.P.; Zowarka, R.C. (IEEE, 1993-01)
      An empirical model for voltage and equivalent series resistance (ESR) has been developed for lead acid batteries used as a pulsed power source. During the design of the battery upgraded supply (BUS) for Eglin Air Force ...
    • Calculation of Slot Losses in High Frequency Electrical Machines 

      Pratap, S.B.; (, undated)
      As new magnetic materials as well as applications emerge in electromechanical conversion systems, one finds that electrical machines are increasingly moving away from the mainstream power frequency to much higher frequencies. ...
    • Capacitor Effects on Induction Motors Fed by Quasi Rectangular Current Sources 

      Hsu, J.S.; (IEEE, 1992-09)
      Analytical and experimental studies of the capacitor effects on the steep rising and falling voltage spikes and the current harmonics in induction motors fed by quasi-rectangular current sources were conducted for the case ...
    • The CEM-UT Rapid-Fire Compulsator Railgun System-Recent Performance and Development Milestones 

      Perkins, D. E.; Pratap, S. B.; Spann, M. L.; Thelen, R. F.; Werst, M. D. (IEEE, 1991-01)
      Twenty-seven compulsator-powered railgun experiments have been performed, including a 1.0 MJ discharge at 3510 r/min. In this test, a 724 kA current pulse accelerated an 80 g, aluminum armature to 2.05 km/s, thus exceeding ...
    • Challenges in the Design of a 100 kW Induction Motor for a PHEV Application 

      Herbst, J.D.; Hahne, J.J.; Jordan, H.E.; Liu, H-P.; Gattozzi, A.L.; Wu, B. (IEEE, 2009-09)
      This paper summarizes some design challenges encountered in the development of a high speed induction motor/generator for a plug-in hybrid electric vehicle (PHEV). The traction system motor/generator was developed for ...
    • Characterization of Triggered Vacuum Switches for High Current Operation 

      Pappas, J.A.; Pish, S.P.; Salinas, M.J. (IEEE, 1999-01)
      Triggered vacuum switches show promise for use in high-power, high-current and high-frequency conversion and switching circuits. Their specific power and power density ratings are well above silicon devices. TVS are robust ...
    • Circuits for Protecting and Triggering SCRs in High-Power Converters 

      Gattozzi, A.L.; Pappas, J.A. (IEEE, 2003-01)
      The performance of high-power converters employing silicon controlled rectifiers (SCRs) operating at several kilovolts and switching several thousands of amperes is strongly dependent on the triggering circuit and the ...
    • A Coaxial Radial Opening Switch for a Distributed-Energy-Store Rail Launcher 

      Upshaw, J.L.; Zowarka, R.C. (IEEE, 1984-03)
      The current electromagnetic launch technology base suggests that a distributed-energy-store railgun may be an attractive alternative to chemical rockets for Earth-to-space launch. If homopolar generator-charged inductors ...
    • Coilgun Structures 

      Andrews, J.A.; (IEEE, 1993-01)
      Research on coilguns at the Center for Electromechanics at the University of Texas at Austin (CEM-UT) has yielded considerable insight into the optimal design of coilgun structures. This research has indicated that the ...
    • Coilgun Technology at The Center for Electromechanics, The University of Texas at Austin 

      Bresie, D.A.; Ingram, S.K. (IEEE, 1993-01)
      The engineering trade-offs performed on a coilgun design are described. The concept used was that of a collapsing field accelerator. This concept was chosen because of its passive operation, and because it lent itself to ...
    • A collaborative early-stage ship design environment 

      Chalfant, J.; Langland, B.; Abdelwahed, S.; Chryssostomidis, C.; Dougal, R.; Dubey, A.; El Mezyani, T.; Herbst, J. D.; Kiehne, T.; Ordonez, J.; Pish, S.P.; Srivastava, S.; Zivi, E. (, 2012)
      Recent advances in sensor and weapons systems are significantly increasing the electrical power that is required and the thermal loads that must be dissipated onboard US Navy ships. Thus, design tools and methods must bring ...
    • Combustion Emissions Modeling and Testing of Conventional Diesel Fuel 

      Liu, H-P.; Strank, S.M.; Werst, M.D.; Hebner, R.E.; Osara, J. (American Society of Mechanical Engineers, 2010-05)
      This paper presents emissions modeling and testing of a four-stroke single cylinder diesel engine using conventional No. 2 diesel fuel. A system level engine simulation tool developed by Gamma Technologies, GT-Power, has ...
    • Combustion Emissions Modeling and Testing of Neat Biodiesel Fuels 

      Liu, H-P.; Strank, S.M.; Werst, M.D.; Hebner, R.E.; Osara, J. (American Society of Mechanical Engineers, 2010-05)
      This paper presents emissions modeling and testing of a four-stroke single cylinder diesel engine using pure soybean, cottonseed, and algae biodiesel fuels. A system level engine simulation tool developed by Gamma Technologies, ...
    • Commissioning of a High Speed Composite Rotor with Hydrostatic Dampers and Ceramic Rolling Element Bearings 

      Headifen, R.N.; Fuller, R.L.; Kitzmiller, J.R. (American Society of Mechanical Engineers, 1993-09)
      A high speed (25,000 rpm) rotating machine with a 300 lb rotor was designed and manufactured. To accommodate the high shaft speed, 2.6 million DN, rolling element bearings were used with ceramic balls and inner races. In ...
    • Commissioning of a Metal Vapor Laser for the Illumination of High Speed Motion Pictures 

      Wehrlen, D.J.; Sarin, S. (IEEE, 1993-01)
      An effort to produce high-speed (20000 frames/s) motion pictures for the purpose of projectile analysis using a pulse-mode copper vapor laser as the sole illumination source was conducted. A single-shaft rotating prism ...
    • Compact Homopolar Generator Development at CEM-UT 

      Gully, J. H.; Estes, E. G.; Walls, W. A.; Weldon, W. F. (IEEE, 1984-03)
      For electromagnetic launchers (EMLs) to become practical devices, they must evolve from laboratory test beds to field-portable systems. Such systems require the development of compact, lightweight, high-energy, high-current ...
    • Comparison of a Single Pulsed Alternator with Two or More in Parallel for Driving a Railgun 

      Eccleshall, D.; Pratap, S. B. (IEEE, 2001-01)
      Pulsed alternators, particularly multipole, multiphase machines incorporating a flexible rectifier/inverter subsystem, can be used for powering large DC railguns. Such machines are able to store energy for several shots; ...