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IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium最新文献

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TRS/2: crossatron switch for thyratron replacement in line modulators TRS/2:用于替换线路调制器中的闸流管的交叉开关
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26259
T. Bekker, R. Schumacher, R. Watkins
{"title":"TRS/2: crossatron switch for thyratron replacement in line modulators","authors":"T. Bekker, R. Schumacher, R. Watkins","doi":"10.1109/MODSYM.1988.26259","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26259","url":null,"abstract":"A second-generation thyratron-replacement switch (TRS/2) based on the crossatron-switch design has demonstrated continuous full-power operation at 4.0 A of average current in a US Navy line-type radar modulator. The outstanding feature of the TRS is its ability to provide ultrastable, fast recovery and fast starting operation while maintaining the potential for long-life service. Improved performance of Navy modulators is being obtained by replacing the Model No. 7390 thyratron with the TRS device, which maintains mechanical and electrical specifications sufficiently similar to those of the 7390 that it can be regarded as a socket replacement. The specifications and construction features of the TRS/2 are described, and attention is given to the operating procedure, test results, equilibrium temperature, start-up time, turn-on delay and jitter, and range of gas pressure yielding stable operation.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123195499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A compact, repetitive, 6.5 kilojoule Marx generator 一个紧凑的，重复的，6.5千焦耳的马克思发电机
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26234
K. Lancaster, R. Clark, M. Buttram
{"title":"A compact, repetitive, 6.5 kilojoule Marx generator","authors":"K. Lancaster, R. Clark, M. Buttram","doi":"10.1109/MODSYM.1988.26234","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26234","url":null,"abstract":"A 1 Hz, 6 kJ, 440 kV field-transportable, repetitive Marx generator was constructed using commercially available hardware, an existing DC power supply, and a few machined plastic parts. The generator was designed and built in three months. The authors review the options considered before choosing the Marx design, and they discuss the use of commercially available hardware in the Marx generator's construction. Operating results are also considered.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130403250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Simulation of transmission line transients using a personal computer 用个人计算机模拟输电线路瞬变
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26275
R. Nelms, S. R. Newton, G. Sheblé, L. Grigsby
{"title":"Simulation of transmission line transients using a personal computer","authors":"R. Nelms, S. R. Newton, G. Sheblé, L. Grigsby","doi":"10.1109/MODSYM.1988.26275","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26275","url":null,"abstract":"The authors present a technique for investigating traveling-wave phenomena on transmission lines using a personal computer. The transmission line is divided into n segments, each consisting of a series resistance and inductance and a shunt conductance and capacitance. A state model is formulated using the capacitor voltage and inductor currents as the state variables. Trapezoidal integration is used to convert the state equations to a set of linear difference equations which are very sparse. The state variables are updated by solving this set of equations. The technique has been verified using the Electromagnetic Transients Program. Execution times for several test cases indicate that it is suitable for use on personal computers.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134594835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Filament considerations for high stability radar 高稳定性雷达的灯丝考虑
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26283
R.A. Gardenghi, E. Piechowiak
{"title":"Filament considerations for high stability radar","authors":"R.A. Gardenghi, E. Piechowiak","doi":"10.1109/MODSYM.1988.26283","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26283","url":null,"abstract":"A summary of filament voltage control techniques for MTI (moving target indicator) systems is presented. It is shown that the selection of the type of filament voltage control to be used depends on a number of factors that influence the stability of the transmitter, including tube type gain, RF frequency, and the PRF (pulse forming network) with its associated stagger and burst patterns. Typically, higher frequency and higher gain tubes are more susceptible to the voltage variations on the filament. For radar transmitters with MTI improvement factors of less than 35 dB, the use of AC on the filament is generally acceptable. From 40 to 45 dB, the use of some type of filament voltage control circuitry offers a 3 to 6 dB benefit in MTI improvement factor. As the requirement for MTI improvement factor is further increased, the improvements resulting from the use of DC or synchronized AC are even more pronounced.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133816340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Gentron's Smart Power High Energy Module-SPHEM series Gentron的Smart Power High Energy Module-SPHEM系列
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26284
L. Kaufman
{"title":"Gentron's Smart Power High Energy Module-SPHEM series","authors":"L. Kaufman","doi":"10.1109/MODSYM.1988.26284","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26284","url":null,"abstract":"The authors describe a novel type of power hybrid circuit incorporating high-power switching capability along with smart power features in a lightweight, hermetically sealed package. The limitations of existing power hybrids are discussed along with the advantages provided by the high-energy-module. Specifications of the SPHEM are presented along with information on how to use this device in power control applications. A design example is presented which shows how twelve SPHEMS are used to form a high-power H-bridge motor speed control. Packaging information and an interconnection diagram are included.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133258696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Solid-state 2 kV, 250 kHz grid modulator for traveling-wave tubes 固态2kv, 250khz栅格调制器，用于行波管
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26230
Walter F. J. Crewson, J. L. Matilaine
{"title":"Solid-state 2 kV, 250 kHz grid modulator for traveling-wave tubes","authors":"Walter F. J. Crewson, J. L. Matilaine","doi":"10.1109/MODSYM.1988.26230","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26230","url":null,"abstract":"A circuit has been developed utilizing high-voltage MOSFET switches in a series totem-pole configuration for driving TWT (traveling wave tube) grids. This system has been used at grid swings up to 1500 volts at 250 kHz, 2000 volts at 100 kHz and 2500 volts at 10 kHz. The pulser is entirely solid-state and is a high-efficiency design, using MOSFET-based switching power supplies to provide the pulse and bias voltages. The switching power supplies provide regulation accuracy of 0.1% for the basic pulse and bias voltages, and as a sample-and-hold circuit senses pulse current and adjusts the pulse supply upward to compensate for voltage drop in the series MOSFET switch. This allows pulse voltage regulation of not more than 3 volts over a pulse load range up to 400 mA.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130122527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Air core pulse transformer design 空芯脉冲变压器设计
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26291
J. O'Loughlin, J. Sidler, G. Rohwein
{"title":"Air core pulse transformer design","authors":"J. O'Loughlin, J. Sidler, G. Rohwein","doi":"10.1109/MODSYM.1988.26291","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26291","url":null,"abstract":"Cylindrical-air-core pulse transformers capable of passing high-voltage/high-energy pulse waveforms with high efficiency and low distortion require a much more delicate design balance of physical dimensions and electrical parameters than iron or ferrite core units. Special computer codes were written to evaluate their performance. The analysis includes calculation of the self and mutual inductances as determined by the dimensions and insulation stresses, and evaluation of the waveform distortion and energy transfer efficiency. It is concluded that air-core transformers operating at hundreds of kilovolts and tens of kilojoules in the microsecond region with energy transfer efficiencies of 70% to 85% are feasible. Effects of the high-frequency-current distribution in the windings and the use of slug-type ferrite cores are also evaluated.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124943239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
A theoretical basis for the optimization of electromagnetic pulse compressors using saturable ferromagnetic cores 为利用饱和铁磁铁芯优化电磁脉冲压缩机提供了理论依据
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26243
G. L. Bredenkamp, P. Swart
{"title":"A theoretical basis for the optimization of electromagnetic pulse compressors using saturable ferromagnetic cores","authors":"G. L. Bredenkamp, P. Swart","doi":"10.1109/MODSYM.1988.26243","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26243","url":null,"abstract":"A model of the Melville line pulse compressors, which takes into account the losses in the system, is analyzed. The ratio between consecutive capacitor values in the line, which is chosen to ensure complete energy transfer, is presented. The relationship among the total volume of core material used, overall compression ratio of the compressor, and the number of stages used is found. From this relationship it is concluded that the volume of core material will be a minimum when the compression ratio per stage is uniformly selected at value of square root e=1.6487. The latter holds for any required overall compression ratio and can be achieved simply by coupling a sufficient number of stages, each with a compression ration square root e, in cascade. This result is of great importance because the cost of magnetic materials used in pulse compressors usually dominates the overall cost.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"2003 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127695166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Connie-a general AC-DC converter and transient circuit analysis program 一个通用的交直流变换器和暂态电路分析程序
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26249
T. Mace, J. Gray, R. McLachlan, I. Dobson
{"title":"Connie-a general AC-DC converter and transient circuit analysis program","authors":"T. Mace, J. Gray, R. McLachlan, I. Dobson","doi":"10.1109/MODSYM.1988.26249","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26249","url":null,"abstract":"Connie allows easy specification of any circuit topology, with switching rules applied in a general way for all types of circuit configuration. The method used by Connie is described. An example is given which demonstrates the types of solution which Connie handles. It is envisaged that the program will be a useful development for general high-voltage switching and transient analysis.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129491202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Optimum switching time for magnetic switches 磁性开关的最佳开关时间
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26242
S.E. Ball
{"title":"Optimum switching time for magnetic switches","authors":"S.E. Ball","doi":"10.1109/MODSYM.1988.26242","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26242","url":null,"abstract":"The author discusses the optimization of magnetic switch core area and saturation time as a function of pulse compression ratio. Typical magnetic switch designs require the switch to remain unsaturated until peak charging voltage is reached. The author has found that the most efficient energy transfer occurs when the magnetic switch is allowed to saturate before peak voltage. The optimum saturation time both minimizes core area and maximizes energy. The author investigated the design of a system using one magnetic switch with a pulse compression of about 3 and discovered that maximum energy transfer occurred when the magnetic switch saturated at 84% of the discharge time. In this example, core area was reduced by 30%. Optimum switching time and core area reduction depend on the pulse compression of the magnetic switch.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123242575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
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