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Six phase rectifier digital computer simulation

Description: A digital computer program has been developed for the simulation of a six-pulse converter with a resistance-inductance load. The program calculates the time histories of the voltages and currents on both the ac and dc sides of the rectifier bridges. The grid delay angle is calculated in terms of the load current, supply voltage, and commutating reactance. The program is written in FORTRAN and is executable on the CDC7600 Plotted output of ten variables can be requested. This program is a prelim… more
Date: October 1, 1975
Creator: Miller, R. W. & Nichols, J. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

TFTR generator load assessment

Description: Typical experimental load demands on the TFTR generators are illustrated based on the electrical characteristics of the field coils, the coil leads, the main bus work, the various auxiliary bus work, the rectifiers, and transformers. The generator MW capacities are shown to be adequate for the proposed experimental operations with allowances made for variations in the final designs. The generator MVA capacities are shown to be adequate provided portions of the TF and EF rectifiers are freewheel… more
Date: October 1, 1975
Creator: Heck, F. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Energy storage and transfer with homopolar machine for a linear theta-pinch hybrid reactor

Description: This report describes the energy storage and transfer system for the compression coil system of a linear theta-pinch hybrid reactor (LTPHR). High efficiency and low cost are the principal requirements for the energy storage and transfer of 25 MJ/m or 25 GJ for a 1-km LTPHR. The circuit efficiency must be approximately 90 percent, and the cost for the circuit 5 to 6 cents/J. Scaling laws and simple relationships between circuit efficiency and cost per unit energy as a function of the half cycle … more
Date: December 1, 1975
Creator: Vogel, H. F.; Brennan, M.; Dase, W. G.; Tolk, K. M. & Weldon, W. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High power semiconductor switching in the nanosecond regime

Description: Light activated multilayered silicon semiconductor devices have been used to switch at megawatt power levels with nanosecond turnon time. Current rate of rise of 700 kA/..mu..s at 10 kA, with 1 kV across the load have been achieved. Recovery time of 1 millisec has been obtained. Applicability to fusion research needs is discussed.
Date: December 1, 1975
Creator: Zucker, O. S.; Long, J. R.; Smith, V. L.; Page, D. J. & Roberts, J. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Energy storage and power conditioning aspects of photovoltaic solar power systems. Volume I. First quarterly report

Description: Solar energy may be utilized as thermal energy or converted into electricity by solar cells. ERDA's National Photovoltaic Conversion Program is concerned with this latter approach and is currently sponsoring industrial programs for photovoltaic systems and devices. In one such program, Spectrolab, Inc., is charged with performing conceptual design and analysis of three photovoltaic solar power systems. The sizes of these three systems will cover the requirements of residential, commercial and e… more
Date: October 1, 1975
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Control system for solar heating and cooling

Description: A control system is being developed that will be capable of operating solar heating and cooling systems covering a wide range of configurations, and using different operating strategies that may be optimal for different climatic regions. To insure widespread applicability of the control system, it is being designed to allow for modification for operating with essentially all practical heating and cooling system configurations and control algorithms simply by interchange of replaceable modules i… more
Date: August 1, 1975
Creator: Wahlig, M.; Binnall, E.; Dols, C.; Graven, R.; Selph, F.; Shaw, R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Low temperature lithium/sulfur secondary battery. Semiannual progress report, December 1, 1974--June 1, 1975. [Development of dissolved sulfur cathode operable at ambient temperatures]

Description: The objective of this program is to develop a dissolved sulfur cathode which can be repeatably charged and discharged with minimal degradation and which is compatible with a Li anode. The redox behavior of dilute S/sub 8/, 0.1--1M LiClO/sub 4/ solutions in dimethyl sulfoxide (DMSO), dimethyl formamide (DMF), tetrahydrofuran (THF), propylene carbonate (PC), ..gamma..-butyrolactone (BL), sulfolane (SL), methyl acetate (MA) and pyridine was investigated. S/sub 8/ and S/sub 8//sup - -/ reductions o… more
Date: July 1, 1975
Creator: Brummer, S. B.; Rauh, R. D.; Marston, J. M. & Shuker, F. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Basic research on ceramic materials for energy storage and conversion systems. Progress report, April 1, 1975--November 30, 1975

Description: The present research program involves utilizing appropriate probes for movement of ionic and electronic charge carriers in ceramic materials suitable for solid electrolyte and electrode applications in high-performance, secondary battery and fuel cell systems. Special emphasis is placed on developing a better understanding of the effects of structure, impurities, and composition on transport mechanisms and on developing detailed knowledge of the kinetics and mechanisms of reactions occurring (o… more
Date: December 1, 1975
Creator: Whitmore, D.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

120 kA pulsed dc power system with computerized thyristor triggering

Description: A pulsed dc power system provides 120 kA excitation current for the ORMAK toroidal field coils. A drive potential of 1000 volts brings the coils up to full current in about 0.5 seconds. Constant current is maintained for 0.25 seconds, then approximately 20 x 10$sup 6$ joules of stored energy is dumped in a free-wheeling diode and resistance network. The power system contains 8 each, 30 kA, 500 V thyristor controlled dc power modules in a series/parallel combination. A control computer generates… more
Date: January 1, 1975
Creator: Mosko, S. W.; Bates, D. D.; Bigelow, R. R.; Cottongim, E. K.; Pipes, E. W. & Sueker, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

High Power Modulator/regulators for neutral beam sources

Description: PPPL has recently completed two new Modulator/Regulators for neutral injection sources used on the ATC machine and is constructing four new ones for use with sources on the PLT machine. The ATC modulator uses the well proven 4CX35,000C tetrode as the main switch tube, while the PLT modulators will be using the new but significantly higher powered X-2170 tetrodes. Some interesting circuit and manufacturing techniques are discussed. (MOW)
Date: January 1, 1975
Creator: Lawson, J.Q. & Deitz, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fault protection for neutral-beam injection systems

Description: This paper discusses the accelerating, or main supply for the Neutral Injection System on PLT and, in particular, provides evaluation of a system for protection against the possibility of an arc developing in the accel portion of the ion source gun. The design of a protection scheme utilizing a fast turn-on and turn-off ignitron crowbar is described and evaluated. This crowbar is used to provide backup protection for the ion source high power vacuum tube used as a voltage regulator and series s… more
Date: December 1, 1975
Creator: Knauer, R. C.; Ashcroft, D. L.; Murray, J. G. & Newman, R. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

PLT neutral injection ignitron accelerating supply

Description: A phase-controlled rectifier was designed for the accelerating supply on the PLT Neutral Beam Injection system at PPPL. The rectifier must furnish 70 amperes at up to 50 KV for 300 milliseconds, with a duty cycle of up to 10 percent. Protection of the injectors requires the supply to withstand repeated crowbarring. The rectifying element selected to satisfy these requirements was a commercially-available ignitron, installed in a supporting frame and using firing circuits and controls designed b… more
Date: November 1, 1975
Creator: Ashcroft, D. L.; Murray, J. G.; Newman, R. A. & Peterson, F. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design considerations and data for gas-insulated high voltage structures

Description: This paper is intended to benefit the person faced with the occasional task of designing gas insulated high-voltage structures or spark gaps and who must decide upon the proper geometry, spacings, gas type, and pressure for reliable voltage-holding. An approach is presented along with a summary of how various factors affect voltage breakdown. The design procedures described apply to situations where the influence of nearby insulators is negligible. The accuracy of the data is estimated to be wi… more
Date: November 1, 1975
Creator: Hopkins, D. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Conceptual design of a neutral-beam injection system for the TFTR

Description: The neutral-beam injection requirements for heating and fueling the next generation of fusion reactor experiments far exceed those of present devices; the neutral-beam systems needed to meet these requirements will be large and complex. A conceptual design of a TFTR tokamak injection system to produce 120 keV deuterium-ion beams with a total power of about 80 MW is given. (auth)
Date: November 1, 1975
Creator: Ehlers, K. W.; Berkner, K. H.; Cooper, W. S.; Hooper, E. B.; Pyle, R. V. & Stearns, J. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Saturable reactor-controlled power supply system for TCT/TFTR neutral beam sources

Description: Each neutral beam source requires one major power supply, the acceleration supply, and four auxiliary power supplies. The power supplies are designed to permit independent interruption of current to any source and crowbarring within 20 $mu$sec, in the event of a source spark, while not disturbing the normal pulsing of all other adjacent sources. The sources are described. (MOW)
Date: November 1, 1975
Creator: Baker, W. R.; Hopkins, D. B.; Dexter, W. L.; Kuenning, R. W. & Smith, B. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Pulsed power liner for PLT energy systems

Description: PLT is Princeton University's latest Tokamak machine in the controlled thermonuclear fusion research effort. The OH (ohmic heating) and SF (shaping field) systems for the machine place a very high energy pulsed current load on the AC line feeding them. This paper describes the two systems and the steps taken to insure minimum effect on line regulation during the pulsed operation. (auth)
Date: January 1, 1975
Creator: Armellino, C. A.; Bronner, G. & Murray, J. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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