Browsing by Subject "TEXT"

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Applying a Homopolar Power Supply to a Tokamak
(1976-11) Wildi, P.; Hutchins, S; Driga, M.D.
The new Texas Experimental Tokamak (TEXT) will use homopolar generators as a pulsed power source. The high current, low voltage output of such a source calls for unusual solutions to achieve a proper match to toroidal toil system and ohmic heating system. The paper discusses several possible alternatives. The solutions chosen for both the toroidal and the heating coil system are described including some of the salient components such as switches and power electronics.
Preliminary Engineering Design of a Pulsed Homopolar Generator Power Supply
(IEEE, 1976-11) Bird, W.L.; Dase, W.G; Grant, G.B; Rylander, H.G; Tolk, K.M; Weldon, W.F; Woodson, H.H.
A 200 megajoule 500 volt homopolar generator system is proposed as the inertial storage-conversion device for the Texas Experimental Tokamak (TEXT). The initial engineering design of a 50 megajoule 125 volt homopolar generator module is presented and major components: yoke/field coil; rotor/shaft/bearings; brushes and armature conductors are described in detail. The support for this work was provided by the Energy Research and Development Administration (ERDA) and the Texas Atomic Energy Research Foundation (TAERF).
The Proposed CEM-UT 50-MJ Pulsed Homopolar Generator Power Supply
(IEEE, 1982-01) Weldon, W.F.; Aanstoos, T.A.
The Center for Electromechanics at the University of Texas at Austin (CEM-UT) has been involved since 1972 both in the development of homopolar generators (HPGs) as pulsed power supplies and in the application of these power supplies to a variety of loads. We have proposed that a 50-MJ HPG system be built as an experimental power supply for future CEM-UT research and development. This system will be part of a new research facility UT plans to build for CEM-UT at the UT Balcones Research Center. Originally the machine was to be a modified version of the 50-MJ HPG designed to power the UT Texas Experimental Tokamak (TEXT). However, recent developments by CEM-UT indicate that a modular approach offers greater performance flexibility. The attractiveness of modular construction is particularly en- hanced by the concurrent develop
System Engineering and Design of a Pulsed Homopolar Generator Power Supply for the Texas Experimental Tokamak
(1977-10) Bird, W.L.; Grant, G.B; Weldon, W.F; Rylander, H.G; Woodson, H.H.
The design of a homopolar generator power supply for the Texas Experimental Tokamak (TEXT) is presented. Four series-connected disk type homopolar machines serve as inertial energy storage and conversion devices to supply 50-70 MW peak power to the toroidal field coil and ohmic heating coil circuits. The system is nominally operated at 150 MJ, 430 V to provide a 0.5 sec flat top, 160kA TF current pulse and a 0.3 sec, kA OH current pulse every 2.0 min on a continuous basis. The system has a maximum capacity of 200 MJ at a maximum open circuit voltage of 500 V. The homopolar machine design is described. The vertical shaft generators are excited by water-cooled, copper field coils and have ferromagnetic rotors. The magnetic reluctance torque tends to tilt the rotor between the cast steel pole pieces and hydrostatic journal bearings have been designed to maintain the angular position of the rotor. The rotor is suspended by a Kingsbury type hydrodynamic thrust bearing. The main ac powered oil supply system is backed by a completely redundant dc drive oil supply which is powered by station batteries. Control power is provided by a non-interruptible battery-inverter supply. The generators are driven by SCR controlled, variable speed de motor drives which are equipped with contactors and resistors for dynamic braking. Internal generators losses are removed by a combination of forced air ventilation and water cooling. The forced air system has provisions for the collection of brush wear debris. The overall generator configuration is designed to require minimum down time for brush maintenance. The TEXT homopolar generator system was designed under funding support provided by the O.S. Energy Research and Development Administration (ERDA) .
The TEXT Energy Storage System
(1977-11) Weldon, W.F.; Rylander, H.G; Woodson, H.H.