2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC)最新文献_第5页

Dielectric properties of natural ester, synthetic ester Midel 7131 and mineral oil Diala D 天然酯、合成酯middel 7131和矿物油Diala D的介电性能

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Pub Date : 2012-06-03 DOI: 10.1109/IPMHVC.2012.6518680

Yi Jing, I. Timoshkin, M. Given, Mark P. Wilson, S. Macgregor, Tao Wang, Jane M. Lehr

引用次数: 12

Concrete surface scraping with high voltage pulsed power generator EG-350 混凝土表面刮擦用高压脉冲发电机EG-350

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Pub Date : 2012-06-03 DOI: 10.1109/IPMHVC.2012.6518799

I. Egorov, G. G. Kanaev, V. R. Kukhta, V. Lopatin, A. V. Nashilevskiy, G. Remnev, K. Uemura

引用次数: 0

Investigations on the dielectric strength of carbon dioxide and carbon dioxide mixtures for the application in gas insulated switchgear 气体绝缘开关柜用二氧化碳和二氧化碳混合物介电强度的研究

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Pub Date : 2012-06-03 DOI: 10.1109/IPMHVC.2012.6518681

P. Nikolic, A. Kurz, M. Hoffacker, A. Schnettler

{"title":"Investigations on the dielectric strength of carbon dioxide and carbon dioxide mixtures for the application in gas insulated switchgear","authors":"P. Nikolic, A. Kurz, M. Hoffacker, A. Schnettler","doi":"10.1109/IPMHVC.2012.6518681","DOIUrl":"https://doi.org/10.1109/IPMHVC.2012.6518681","url":null,"abstract":"The ongoing debate on climate change and emission restrictions for greenhouse gases also forces the search for SF6 alternatives (sulphur hexafluoride) in the energy transmission and distribution sector. Hence several challenges for the asset manufactures result as changing the insulating medium implies a redesign of the switchgear and its components. Here one effect in gas insulated switchgear is the reduction of the dielectric strength in case of contamination of the gas compartments with metal particles. In this paper the dielectric strength of the promising SF6 substitute CO2 (carbon dioxide) and its mixtures with non-toxic gases under particle contamination is investigated. For this purpose an arrangement designed according to a real gas insulated switchgear is used. From the comparison of the experimental investigations results a statement on the dielectric strength of CO2 under non-uniform field conditions and on the enhancement of this dielectric strength by the admixture of additional gaseous components. These results can serve as a means for the dielectric design of a SF6-free gas insulated switchgear.","PeriodicalId":228441,"journal":{"name":"2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC)","volume":"117 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129149709","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

Investigation of non-heating sterilization method of packed fresh foods by pulsed electric field 脉冲电场对包装新鲜食品非加热灭菌方法的研究

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Pub Date : 2012-06-03 DOI: 10.1109/IPMHVC.2012.6518789

T. Higuchi, Y. Kuramochi, T. Saito, Y. Minamitani

{"title":"Investigation of non-heating sterilization method of packed fresh foods by pulsed electric field","authors":"T. Higuchi, Y. Kuramochi, T. Saito, Y. Minamitani","doi":"10.1109/IPMHVC.2012.6518789","DOIUrl":"https://doi.org/10.1109/IPMHVC.2012.6518789","url":null,"abstract":"Currently, foods have been mainly sterilized using chemicals, heating and ultraviolet rays. However, these methods have some problems, for example, the change of the taste and constituent of fresh foods, the risk of the residual chemicals and low efficiency. To solve these problems, the sterilization by the pulsed electric field has been proposed. When the pulsed electric field is applied to a bacterium or fungus, the voltage concentrates to the membrane of it. If the membrane has over 1V of the voltage, breakdown occurs in the membrane. As a result, a pore is made on the membrane and it is sterilized. However, in the case of packed food, since a packing plastic bag is an insulator, the electric field didn't be applied to the bacteria and fungi. In the sterilization by the pulsed electric field, a cell can be written as equivalent circuits by capacitors and resistors. The membrane is the capacitor and the cytoplasm is the resistor. Also the foods can be written as equivalent circuits by capacitors and resistors and a packing plastic bag is written as the capacitor. Therefore, the intensities of the electric field applying to the cell and the bag are changed by the frequency of applying pulsed electric field. This work focuses on sterilization of the packed fresh foods by the pulsed electric field. In this study, we have investigated the sterilization ratios of E. coli packed by a plastic film for the voltage pulses of several frequencies.","PeriodicalId":228441,"journal":{"name":"2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129015047","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

Surface flashover development on transformer oil-pressboard interface 变压器油压板界面表面闪络的发展

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Pub Date : 2012-06-03 DOI: 10.1109/IPMHVC.2012.6518674

J. Jadidian, M. Zahn, N. Lavesson, O. Widlund, K. Borg

引用次数: 6

The lightning tests for the radome in Z11 helicopter of China 中国Z11直升机雷达罩雷电试验

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Pub Date : 2012-06-03 DOI: 10.1109/IPMHVC.2012.6518820

Zemin Duan, Xiaoliang Si, Jie Feng, Jing-bo Duan, Youyuan Ni, Xin Li, Rongbao Chen, Anhong Sun

引用次数: 0

Evolution of plasma density generated by high power microwaves 高功率微波产生等离子体密度的演化

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Pub Date : 2012-06-03 DOI: 10.1109/IPMHVC.2012.6518710

S. Beeson, A. Neuber

{"title":"Evolution of plasma density generated by high power microwaves","authors":"S. Beeson, A. Neuber","doi":"10.1109/IPMHVC.2012.6518710","DOIUrl":"https://doi.org/10.1109/IPMHVC.2012.6518710","url":null,"abstract":"The relaxation time of pulsed rf-generated plasma is investigated. A 3 MW, 3 μs width, 50 ns risetime HPM pulse is transmitted through a dielectric window that terminates a WR-284 waveguide filled with insulating gas. The investigated plasma is formed across the dielectric window on the atmospheric side. This produces electron densities on the order of 1013 to 1012 cm-3 for 60 to 145 torr in air, respectively. In the same pressure range, initial attenuation (~ 0.5 dB) of the microwaves is observed after tens to hundreds of nanoseconds with final attenuation values approaching -40 to -10 dB, respectively. To determine plasma relaxation times after the HPM pulse terminates a multi-standard waveguide coupler (X/S-band) was designed to inject a low power 10 GHz signal used for probing the surface plasma. The coupler was designed to have high coupling coefficients (> -5 dB) for the specific narrowband around 10 GHz (BW ~ 10 MHz) along with negligible insertion loss of the HPM propagation. From the measured attenuation and reflection of the 10 GHz probe signal, the evolution of the electron density is inferred. Furthermore, in an air environment, the density falls exponentially implying attachment as the dominate electron loss mechanism.","PeriodicalId":228441,"journal":{"name":"2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC)","volume":"517 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116702616","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

Operational results of pulse shaping techniques for the High Voltage Convertor Modulator 高压变换器调制器脉冲整形技术的运行结果

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Pub Date : 2012-06-03 DOI: 10.1109/IPMHVC.2012.6518829

G. Patel, D. E. Anderson, D. Solley, M. Wezensky

引用次数: 1

Simulation of high-voltage DC breakdown for angled dielectric insulators including space-charge and gas-collision effects 含空间电荷和气体碰撞效应的倾斜介质绝缘子高压直流击穿仿真

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Pub Date : 2012-06-03 DOI: 10.1109/IPMHVC.2012.6518679

M. Aldan, J. Verboncoeur

引用次数: 1

Design and test of a modular trigger generator for over-voltage triggering of Marx generators 马克思发电机过电压触发模块的设计与测试

2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC) Pub Date : 2012-06-03 DOI: 10.1109/IPMHVC.2012.6518744

M. Sack, G. Muller

引用次数: 3