2005 IEEE Pulsed Power Conference最新文献_第6页

Investigation of Charge Conduction and Self-Breakdown in Transformer Oil 变压器油中电荷传导和自击穿的研究

2005 IEEE Pulsed Power Conference Pub Date : 2005-06-13 DOI: 10.1109/PPC.2005.300539

M. Butcher, M. Cevallos, Andreas A. Neuber, H. Krompholz, James C. Dickens

{"title":"Investigation of Charge Conduction and Self-Breakdown in Transformer Oil","authors":"M. Butcher, M. Cevallos, Andreas A. Neuber, H. Krompholz, James C. Dickens","doi":"10.1109/PPC.2005.300539","DOIUrl":"https://doi.org/10.1109/PPC.2005.300539","url":null,"abstract":"With a fast coaxial setup using a needle/plane geometry and a high sensitivity electrometer, conduction mechanisms in transformer oil at varying temperature and hydrostatic pressure are quantified. There are 3 stages in the conduction process prior to breakdown for highly nonuniform field geometries. Stage I is characterized by a resistive current at low fields. Stage II consists of a rapid rise in the injection current associated with increasing field due to a \"tunneling\" mechanism through the metal/dielectric interface. The transition from the resistive to tunneling stage occurs when the applied field reduces the barrier at the metal/insulator interface to a point where tunneling of charge carriers through the barrier begins. This transition point is polarity dependent. In stage III, at high fields the current reaches space charge saturation at electron mobilities >100 cm2/V*s prior to breakdown. The processes of final breakdown show distinct polarity dependence. Data for the negative needle exhibits strong pressure dependence of the breakdown voltage, which is reduced by 50% if the hydrostatic pressure is lowered from atmospheric pressure to hundreds of mtorr. Such a strong pressure dependence, at reduced hydrostatic pressure, indicates breakdown is gaseous in nature. This is supported by images of bubble/low density regions forming at the current injection point. Positive needle discharges show a reduction of only about 10% in breakdown voltage for the reduced pressure case. A weak pressure dependence indicates the breakdown mechanism does not have a strong gaseous component. We will discuss possible links between conduction current and DC breakdown.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131969716","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: 3

Present and Future Naval Applications for Pulsed Power 脉冲功率在海军中的应用

2005 IEEE Pulsed Power Conference Pub Date : 2005-06-13 DOI: 10.1109/PPC.2005.300462

F. C. Beach, I. McNab

引用次数: 29

Geometric Modeling of Flashover Configurations in Metallized Polypropylene Film 金属化聚丙烯薄膜闪络结构的几何建模

2005 IEEE Pulsed Power Conference Pub Date : 2005-06-13 DOI: 10.1109/PPC.2005.300456

E. Halstead, A. Caulcrick, J. Zirnheld, H. Singh

引用次数: 0

Integrated Measurement of Multi-Channel-Current Flowing into Single Load 单负载多通道电流集成测量

2005 IEEE Pulsed Power Conference Pub Date : 2005-06-13 DOI: 10.1109/PPC.2005.300722

R. Shukla, A. Shyam, S. Chaturvedi, R. Kumar, D. Lathi, V. Chaudhary, R. Verma, K. Debnath, S. Sharma, J. Sonara, K. Shah, B. Adhikary

{"title":"Integrated Measurement of Multi-Channel-Current Flowing into Single Load","authors":"R. Shukla, A. Shyam, S. Chaturvedi, R. Kumar, D. Lathi, V. Chaudhary, R. Verma, K. Debnath, S. Sharma, J. Sonara, K. Shah, B. Adhikary","doi":"10.1109/PPC.2005.300722","DOIUrl":"https://doi.org/10.1109/PPC.2005.300722","url":null,"abstract":"There are various plasma applications of MTF in which very high currents are delivered using modules of capacitor banks to a single load as per the load requirement. Moreover there are other applications too, in which the large number of transmission lines feed a load from a single high-energy capacitor because of their well-defined current ratings. In such type of applications, the total current measurement at load may not be a safe practice for diagnostic equipments involved, as well as there may be space constraint also to put such system. For these applications we are reporting an integrated current measurement system consisting of similar current transformers through which each channel of current is threaded and the instrument itself adds the net output directly, without any electronics involvement to avoid electromagnetic noise pick-up. These current transformers are air cored to avoid any saturation and hence any non- linearity in output thereafter. The former is made of nylon, which is nonmagnetic and serves as air core. The theoretical as well as basic experimental results are given in this paper.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125504782","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

ZR Marx Capacitor Life Test and Production Statistics ZR Marx电容器寿命试验及生产统计

2005 IEEE Pulsed Power Conference Pub Date : 2005-06-13 DOI: 10.1109/PPC.2005.300574

R. Cooper, J. Ennis, D.L. Smith

引用次数: 1

Development of Atlas Liner Cassette Power Flow Channel 阿特拉斯衬垫式功率流通道的研制

2005 IEEE Pulsed Power Conference Pub Date : 2005-06-13 DOI: 10.1109/PPC.2005.300688

M. Salazar, S. Feng, J. Griego, R. Randolph, R. Sebring, P. Reardon

引用次数: 0

Application of High-Power Electromagnetic Pulses to Desintegration of Gold-Containing Mineral Complexes 大功率电磁脉冲在含金矿物配合物分解中的应用

2005 IEEE Pulsed Power Conference Pub Date : 2005-06-13 DOI: 10.1109/PPC.2005.300650

V. Chanturiya, I. Bunin, A. Kovalev

{"title":"Application of High-Power Electromagnetic Pulses to Desintegration of Gold-Containing Mineral Complexes","authors":"V. Chanturiya, I. Bunin, A. Kovalev","doi":"10.1109/PPC.2005.300650","DOIUrl":"https://doi.org/10.1109/PPC.2005.300650","url":null,"abstract":"The application of High-Power Electromagnetic Pulses (HPEMP) irradiation in dressing of resistant gold- containing ores appears attractive as this technique provides for a significant increase in precious metal recovery (30-80% for gold and 20-50% for silver), therewith helping reduce both energy consumption and the cost of products. This study deals with plausible mechanisms of disintegration of mineral particles under the action of nanosecond HPEMP with high electric field strength ii~107 V/m. Experimental data are presented to confirm the formation of breakdown channels and selective disintegration of mineral complexes as a result of pulse irradiation, which makes for efficient access of lixiviant solutions to precious metal grains and enhanced precious metal recovery into lixivia during leaching. We studied the influence of HPEMP on the technological properties of particles of refractory gold- and silver-containing ores and beneficiation products from Russian deposits. Preliminary processing of gravity concentrate of one deposit ore with a series of HPEMP resulted in significant increase of gold and silver extraction into lixivia during the cyanidation stage, with gold recovery increased by -31% (from 51.2% in a blank test to 82.3% after irradiation) and silver recovery increased by 47% (from 21.8% to 68.8%). Gold recovery from stale gold-containing dressing tailings of the two integrated mining-and-dressing works increased after pulses-irradiation from 8-12% to 80-90%.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122976346","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

Wire Exploding in a Focus of Converging Cylindrical Shock Wave in Water - Introductory Remarks 钢丝在水中汇聚圆柱冲击波焦点处爆炸——导言

2005 IEEE Pulsed Power Conference Pub Date : 2005-06-13 DOI: 10.1109/PPC.2005.300597

K. Kolacek, J. Schmidt, V. Prukner, P. Šunka, O. Frolov, J. Straus, M. Martinkovả

引用次数: 7

Design of a 500-KJ Capacitor Bank Module for EML Materials Testing EML材料测试用500kj电容器组模块的设计

2005 IEEE Pulsed Power Conference Pub Date : 2005-06-13 DOI: 10.1109/PPC.2005.300587

J. Neri, T. Holt

{"title":"Design of a 500-KJ Capacitor Bank Module for EML Materials Testing","authors":"J. Neri, T. Holt","doi":"10.1109/PPC.2005.300587","DOIUrl":"https://doi.org/10.1109/PPC.2005.300587","url":null,"abstract":"The U.S. Navy is considering the development of an electromagnetic launcher (EML) for surface-fire support and other missions[1]. The EML system will need to have fire rates of 6-12 rounds per minute and barrel lifetimes approaching 10,000 rounds. The Naval Research Laboratory has initiated a program to develop and test materials to achieve these fire rates and lifetimes[2]. A facility is being assembled to allow testing of rail and armature materials at the high current density, pressure and sliding velocity of the Navy EML. The test system needs to operate over a large range of charging voltages and test configurations. The system also needs to deliver high reliability and reproducibility to accommodate the testing requirements. A 500-kJ module is being designed as the basic building block of the pulsed power system for the facility. Each module will supply up to 100 kA to the materials test system. The components being considered are similar to those proposed for a 200 MJ EML pulsed power system[3]. The capacitors are new, 125 kJ/can, 11-kV units from General Atomics Electronics Systems. The switching thyristors and crowbar diodes are from ABB. A series inductor of approximately 80 muH is used to limit the peak current to 100 kA and isolate modules from each other and to ensure that the current is delivered to the test system. It is expected that the solid-state components used for switching and crowbarring will provide the reliability and flexibility desired for the pulsed power system. The circuit is analyzed with the dynamic nature of the test system included. The rising inductance of the test must be included in the modeling to accurately reflect the action required from the switching and crowbar elements, and the fuses that are in series with capacitors. The physical layout of the banks is also being designed to provide highly compact modules while providing access for maintenance and repair. Results of the simulations will be presented, along with mechanical layout plans.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115858619","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: 9

A Compact High-Power Pulsed Corona Source for Treatment of Pollutants in Heterogeneous Media 用于非均质介质中污染物处理的小型大功率脉冲电晕源

2005 IEEE Pulsed Power Conference Pub Date : 2005-06-13 DOI: 10.1109/PPC.2005.300550

A. Pokryvailo, M. Wolf, Y. Yankelevich, É. Abramzon

{"title":"A Compact High-Power Pulsed Corona Source for Treatment of Pollutants in Heterogeneous Media","authors":"A. Pokryvailo, M. Wolf, Y. Yankelevich, É. Abramzon","doi":"10.1109/PPC.2005.300550","DOIUrl":"https://doi.org/10.1109/PPC.2005.300550","url":null,"abstract":"This paper reports the ongoing effort on development of efficient, compact pulsed corona sources for pollution control applications 1. The system comprises an all-solid state 2-kW average power (it can be doubled without change of size), compact (<130 kg) nanosecond pulser and a plasma reactor. The pulser makes use of magnetic compression techniques. One compression stage suffices for the forming of 60 kV, 100 ns, 3 J pulses across a reactor having an impedance of approximately 100 Omega, at a PRF of up to 500 Hz; the risetime is 15 ns. The plasma reactor implemented as a checker mesh of wire electrodes handles both gases' and liquids' streams. In the case of gas, gas stream is seeded by atomized water; polluted liquids are fed in atomized state. In both cases, the treatment is conducted in heterogeneous media. Mechanical and electrical designs are detailed. Typical voltage and current waveforms, both with equivalent and corona load, volt-ampere characteristics, corona discharge appearance, etc., are presented. At operation on a resistive and corona loads, the compressor efficiency was found to be approximately 82% and 62%, respectively.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115865779","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