CEM Publications
Recent Submissions
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Higher frequency performance of stress-grading systems for HV large rotating machines
(Conference on Electrical Insulation and Dielectric Phenomena, 2006) -
Design and Testing of Integrated Metal Armature Sabots for Launch of Armor Penetrating Projectiles from Electric Guns
(IEEE, 1995-01)Electromagnetic railguns have now demonstrated their potential as an efficient vehicle for the launching of long rod armor penetrating projectiles capable of defeating heavily armored mobile targets. Mid-body-drive, ... -
Discarding Armature and Barrel Optimization for a Cannon Caliber Electromagnetic Launcher System
(IEEE, 1995-01)The authors detail the optimization and baseline design of the discarding metal armature and electromagnetic railgun developed for the US Army Armament Research Development and Engineering Center and US Marine Corps sponsored ... -
Electromagnetic and Structural Analyses of Electric Gun and Integrated Launch Package Systems
(IEEE, 1995-01)The authors describe electromagnetic and structural analyses of electric gun and integrated launch packages. Models presented were developed for the Sabot Launched Electric Gun Kinetic Energy projectile (SLEKE) program and ... -
Status of the 9 MJ Range Gun System
(IEEE, 1995-01)The 9 MJ Range Gun system under construction at the Center for Electromechanics at The University of Texas at Austin is designed as a self-contained, field portable electromagnetic launch system to accelerate a salvo of ... -
Fabrication and Testing of a 30 mm and 90 mm Laminated, High L’ Railgun Designed and Built at CEM-UT
(IEEE, 1995-01)With the emphasis on moving railgun technology from a laboratory based setting out into the field, a new lighter weight and stiff railgun structure was designed at the Center for Electromechanics at The University of Texas ... -
Railgun Instrumentation
(IEEE, 1995-01)In recent years, the railgun focus has switched to developing tactical weapons with launch velocities of 2 to 3 km/s. The projectile focus for tactical weapons has switched from plasma to solid armatures because of their ... -
Fabrication of a Compact Storage Inductor for Railguns
(IEEE, 1984-03)A liquid nitrogen-cooled, coaxial, energy storage inductor has been designed and built to be used in conjunction with a compact homopolar generator to form a high-energy-density power supply for use with electro-magnetic ... -
Power Electronics and Controls for Air Core Compulsator
(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 ... -
Shaft Signals of salient-Pole Synchronous Machines for Eccentricity and Shorted Field Coil Detections
(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 ... -
Comparison of the Nature of Torque Production in Reluctance and Induction Motors
(IEEE, 1990-06)The nature of torque production is different in reluctance and inductance motors. One significant difference occurs in a reluctance motor that has nonsalient stator punching and a salient motor. When the flux per pole is ... -
Design and Testing of a Rapid Fire, Lightweight, Ultra Stiff Railgun for a Cannon Caliber Electromagnetic Launcher System
(IEEE, 1995-01)The goal of the Cannon Caliber Program is to drive 185 g integrated launch packages to 1850 m/s. Three, five-round salvos with a firing rate of 5 Hz are intended to defeat specified targets at a range of up to 3 km. After ... -
Monitoring of Defects in Induction Motors Through Air-Gap Torque Observation
(IEEE, 1995-09)This paper suggests a method to monitor defects such as cracked rotor bars and the shorted stator coils in induction motors. Air-gap torque can be calculated while the motor is running. No special down time for measurement ... -
Effects of Eccentricities on Shaft Signals Studied Through Windingless Rotors
(IEEE, 1994-09)Shaft signals of electric rotating machines offer potentials for defect detection. The signals are affected by many factors. This study specifically focuses on how eccentricities affect shaft signals through theoretical ... -
Shaft Signals Corresponding to Cracked Rotor Bars of Induction Machines
(, 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 ... -
Commissioning of a High Speed Composite Rotor with Hydrostatic Dampers and Ceramic Rolling Element Bearings
(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 ... -
High Magnetic Field Generation Using Single Turn Coils
(IEEE, 1994-07)This study presents a new observation that links shaft signals to cracked rotor bars. Theoretical foundation for this observation is derived. Experimental results clearly confirm the theory that under loaded conditions, ... -
Preliminary Design of a 1 Gigajoule Homopolar Generator
(IEEE, 1993-01)A high-energy, high-voltage homopolar generator (HPG) has been designed. The HPG will have composite flywheels to maximize energy storage density and a multipass armature to achieve high output voltage. The HPG is designed ... -
Experimental Testing of Thick Wall Graphite Composite Rings
(, undated)Test results are presented from pressurizing thick walled graphite hoop wound composite rings to very high internal radial pressure. Hydraulic pressures exceeding 40,000 psi were obtained. The testing was performed on rings ... -
A New High Current Laboratory and Pulsed Homopolar Generator Power Supply at The University of Texas
(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 ...
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