Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.最新文献_第9页

Flue gas treatment by pulsed power 脉冲功率处理烟气

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189440

G. Imada, T. Sakurai, F. Edo, W. Jiang, K. Yatsui

引用次数: 0

Field analysis of TWT HVPS transformer and HV module 行波管高压ps变压器及高压模块的现场分析

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189526

S.C. Kim, S. Nam, D.T. Kim, K. Ha, S. Jeong, D. Park, H. Kwon, J. Chun

{"title":"Field analysis of TWT HVPS transformer and HV module","authors":"S.C. Kim, S. Nam, D.T. Kim, K. Ha, S. Jeong, D. Park, H. Kwon, J. Chun","doi":"10.1109/MODSYM.2002.1189526","DOIUrl":"https://doi.org/10.1109/MODSYM.2002.1189526","url":null,"abstract":"The role of a high power density DC power supply is very important in designing a compact and high efficiency TWT microwave amplifier. In order to fabricate a compact power supply, it is necessary to reduce transformer volume by increasing switching frequency of the power supply. However, a step-up ratio of the transformer in the high voltage DC power supply could not be indefinitely increased due mainly to self-resonance by stray capacitance and leakage inductance. Therefore, the pulse transformer should be carefully designed to fulfill its function in the power supply. A high frequency and high voltage pulse transformer is designed, fabricated, and tested. Switching frequency of the transformer is 100 kHz. Input and output voltages of the transformer are 250 V and 4 kV, respectively. Normal operation power of the transformer is 3 kW. Maximum allowed volume of the transformer is 400 cm/sup 3/. The transformer is installed in a metal box that has nominal operation temperature of 85 degree centigrade. The transformer and other high voltage components in the box are molded with silicon RTV that has a very low thermal conductivity. Calculated and measured results of various parameters such as transformer loss, temperature rise, leakage inductance, distributed capacitance, and hysterisis characteristics are presented. In addition, field analysis results obtained with ANSYS code for the transformer and the HV module are also presented.","PeriodicalId":339166,"journal":{"name":"Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125886566","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

Over modulated HF transmitter 过调高频发射机

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189528

J. Bare

{"title":"Over modulated HF transmitter","authors":"J. Bare","doi":"10.1109/MODSYM.2002.1189528","DOIUrl":"https://doi.org/10.1109/MODSYM.2002.1189528","url":null,"abstract":"A pulsed HF, AM transmitter, utilizing extremely high levels of over modulation has been designed and tested. Over modulation of an AM, RF signal, produces a pulse whose frequency is the same as the applied audio modulation frequency. In its final form, the transmitter had an unmodulated carrier wave of 3.5 Watts with a modulated output of 45 Watts PEP into a 50 ohm load. Rise and fall times of the pulse envelope were approximately 1 microsecond each. Pulse rate capabilities were in excess of 160 kHz. Single frequency, square wave modulation produces no distortion of the audio when demodulated. Most, but not all, of the RF power in this transmitter is shifted to the side bands. The residual carrier eliminates the additional internal oscillator and mixer circuits necessary for side band receivers. The extreme levels of over modulation produce a demodulated wave of very high intensity which is not carrier wave power dependent. High harmonic levels, in conjunction with a variable audio input frequency, produces a wide spectrum of impedances which can be used in therapeutic applications. The output signal is extremely difficult to jam and has potential military applications. The transmitter has potential for PAM digital radio transmission in a spread spectrum mode.","PeriodicalId":339166,"journal":{"name":"Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127462883","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

Compact Marx generator test system 紧凑型马克思发电机测试系统

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189500

F. Peterkin, B. Hankla, J. Stevens, J. F. Sharrow, D. Stoudt

引用次数: 0

Compact nanosecond pulse generator for cell electroperturbation experiments 用于细胞电扰动实验的紧凑型纳秒脉冲发生器

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189488

A. Kuthi, T. Vernier, X. Gu, M. Gundersen

引用次数: 16

NO/sub x/ removal from engine exhaust gas using multipoints DBD and pulse streamer discharges with SOS pulse generator 使用多点DBD和带有SOS脉冲发生器的脉冲拖缆排放从发动机废气中去除NO/sub / x

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189544

K. Takaki, T. Sasaki, S. Kato, S. Mukaigawa, T. Fujiwara

{"title":"NO/sub x/ removal from engine exhaust gas using multipoints DBD and pulse streamer discharges with SOS pulse generator","authors":"K. Takaki, T. Sasaki, S. Kato, S. Mukaigawa, T. Fujiwara","doi":"10.1109/MODSYM.2002.1189544","DOIUrl":"https://doi.org/10.1109/MODSYM.2002.1189544","url":null,"abstract":"NO/sub x/ removal from a diesel engine exhaust and simulated gases was carried out using two different nonthermal plasma reactors. One is multipoints dielectric barrier discharge (DBD) reactor, the other is pulse streamer discharge (PSD) reactor. In the former reactor, the 2 mm thickness Pyrex glass plate is used as the dielectric barrier. The DBD reactor is driven by IGBT pulse modulator which can supply the 10 kV pulse voltage to the reactor with repetition rate of 2.5 kpps. The co-axial cylinder type discharge chamber is used as the PSD reactor which is driven by the pulse power generator with semiconductor opening switches (SOS). The SOS pulse generator can supply both polarity of 30 kV pulse with 300 pps repetition rate. The DBD reactor energy cost for NO removal from simulated gas (N/sub 2/:O/sub 2/=9:1, initial NO concentration = 200 ppm) is obtained to 12 g/kWh at 65% removal in 5 l/min. gas flow rate. The energy cost of the PSD reactor is almost 12 g/kWh at 25% NO removal efficiency. The DBD reactor was applied to 20 kVA diesel engine generator exhaust gas treatment. The contained NO/sub x/ (NO+NO/sub 2/) is abated from 70 to 40 ppm at no-load to the generator, and from 340 to 300 ppm. at 50 A load. The energy cost for the NO/sub x/ removal is obtained to 32 g/kWh.","PeriodicalId":339166,"journal":{"name":"Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131515781","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: 2

Marx-stacked IGBT modulators for high voltage, high power applications 用于高电压、高功率应用的马克斯堆叠IGBT调制器

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189497

R. Richter-Sand, R. Adler, R. Finch, B. Ashcraft

引用次数: 12

The high voltage power supply system of ECRH for HT-7 HT-7型ECRH高压供电系统

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189549

T. Ding, S. Du, G. Hu, Baohua Liu

引用次数: 5

Measurements of spatial distributions of gas temperature and ozone concentration in barrier discharge type of ozonizer 阻挡式臭氧发生器气体温度和臭氧浓度空间分布的测量

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189505

S. Ihara, C. Yamabe

引用次数: 0

Three turn secondary for the prototype SLAC solid state induction modulator 三匝二次为原型SLAC固态感应调制器

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189430

R. Cassel, J. deLamare, M. Nguyen, G. Pappas, E. Cook, J. Sullivan, C. Brooksby

引用次数: 3