Pub Date : 2006-05-14DOI: 10.1109/MODSYM.2006.365203
C.-J. Huang, R. O’Connell
Recent power amplifiers for transmit/receive (TR) modules have been configured in the Class AB or push-pull mode with a theoretical efficiency of 78.5% and an operational efficiency of only 20% at X-band (8-12.5 GHz) frequencies. In this paper, we present results of a simulation study of a new scheme of power amplifier, in particular, an optoelectronic (OE) Class AB push-pull microwave power amplifier (MPA). With this amplifier, high circuit efficiency and reasonable output power can be achieved at X-band by utilizing a pair of novel photoconductive semiconductor switches (PCSSs) based on intrinsic GaAs instead of the traditional microwave transistors
{"title":"Optoelectronic Class AB Microwave Power Amplifier","authors":"C.-J. Huang, R. O’Connell","doi":"10.1109/MODSYM.2006.365203","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365203","url":null,"abstract":"Recent power amplifiers for transmit/receive (TR) modules have been configured in the Class AB or push-pull mode with a theoretical efficiency of 78.5% and an operational efficiency of only 20% at X-band (8-12.5 GHz) frequencies. In this paper, we present results of a simulation study of a new scheme of power amplifier, in particular, an optoelectronic (OE) Class AB push-pull microwave power amplifier (MPA). With this amplifier, high circuit efficiency and reasonable output power can be achieved at X-band by utilizing a pair of novel photoconductive semiconductor switches (PCSSs) based on intrinsic GaAs instead of the traditional microwave transistors","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114686890","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}
Pub Date : 2006-05-14DOI: 10.1109/MODSYM.2006.365207
A. Andreev, M. Fuks, E. Schamiloglu
The simplest cross-field ubitron is a magnetically insulated coaxial diode with a cold cathode comprising a number of longitudinally oriented single emitters periodically arranged in the azimuthal plane of the diode (a "transparent cathode"). This type of cathode is essentially a wiggler with azimuthally periodic magnetic and electric fields exciting radially oscillating electron currents within the electron flow rotating around the cathode in crossed magnetic and electric fields. The cathode inside the waveguide is also a periodic electro-dynamical system characterized by a set of azimuthal eigenmodes capable of synchronously interacting with the excited radially oscillating currents. Computer simulations of the cross-field ubitron demonstrate controlling microwave generation by changing the external magnetic field with efficiency of >10%. Results of initial experiments are presented
{"title":"First Demonstration of the Simplest Cross-field Ubitron","authors":"A. Andreev, M. Fuks, E. Schamiloglu","doi":"10.1109/MODSYM.2006.365207","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365207","url":null,"abstract":"The simplest cross-field ubitron is a magnetically insulated coaxial diode with a cold cathode comprising a number of longitudinally oriented single emitters periodically arranged in the azimuthal plane of the diode (a \"transparent cathode\"). This type of cathode is essentially a wiggler with azimuthally periodic magnetic and electric fields exciting radially oscillating electron currents within the electron flow rotating around the cathode in crossed magnetic and electric fields. The cathode inside the waveguide is also a periodic electro-dynamical system characterized by a set of azimuthal eigenmodes capable of synchronously interacting with the excited radially oscillating currents. Computer simulations of the cross-field ubitron demonstrate controlling microwave generation by changing the external magnetic field with efficiency of >10%. Results of initial experiments are presented","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132750696","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}
Pub Date : 2006-05-14DOI: 10.1109/MODSYM.2006.365174
C. Vicente, M. Mattes, D. Wolk, H. Hartnagel, J. Mosig, D. Raboso
In this paper, the RF breakdown power threshold in arbitrary complex components based on rectangular waveguide technology is investigated. In particular, multipactor (in vacuum) and corona discharge (close to the Paschen curve minimum) are analyzed. The objective has been to predict the RF breakdown threshold for space applications. The simulation results have been validated with many experimental tests also performed within the frame of this work. The good agreement achieved shows the validity of the approach followed
{"title":"Contribution to the RF Breakdown in Microwave Devices and its Prediction","authors":"C. Vicente, M. Mattes, D. Wolk, H. Hartnagel, J. Mosig, D. Raboso","doi":"10.1109/MODSYM.2006.365174","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365174","url":null,"abstract":"In this paper, the RF breakdown power threshold in arbitrary complex components based on rectangular waveguide technology is investigated. In particular, multipactor (in vacuum) and corona discharge (close to the Paschen curve minimum) are analyzed. The objective has been to predict the RF breakdown threshold for space applications. The simulation results have been validated with many experimental tests also performed within the frame of this work. The good agreement achieved shows the validity of the approach followed","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122204141","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}
Pub Date : 2006-05-14DOI: 10.1109/MODSYM.2006.365233
P. Khilar, A. Makwana, J. Soni, K. Parmar, K. Sathyanarayana, Y. Srinivas, M. Kushwah, D. Bora
A 1.5 MW RF (ap40 MHz) amplifier using Eima tetrode 4CM2500KG is in the testing phase, here at Institute for Plasma Research (IPR). This amplifier is being developed for the ion cyclotron resonance heating (ICRH) system of Super Conducting Steady State Tokamak, SST1. This RF amplifier amplifies an input power of 200 kW to about 1.5 MW. Few DC power supplies are needed for the operation of this amplifier such as plate supply, screen supply, filament supply, and grid supply. We have a conventional HVDC power supply rated for 60 Kv@10 A for the preliminary testing of this RF amplifier. The required RHVPS (25 Kv@120 A) for this amplifier is under development, hence it is beyond the scope of this paper. This amplifier needs about 10 kW (15 V@650 A) of DC power for heating its filament. We have developed a DC power supply of 12kW (15 V@800 A) to feed the heater. Also, the amplifier needs about 4 kW (500 V@8 ADC) and 6 kW (1500 V@4 A) of DC power to feed its control grid and the screen grid, respectively. So, we have developed another two DC power supplies capable of delivering 6 kW (600 V@10 A) and 7.5 kW (1500 V@5 A) to bias the control grid and screen grid of this amplifier, respectively. These power supplies are to be remotely operated from a PC located at a distance of about 20 to 50 meters. Also, there are some interlocks needed among these power supplies and with the plate HVDC power supply, for the stable and safe operation of the amplifier. In this paper, the test results of all these power supplies on a dummy load will be presented
{"title":"Design and Development of DC Power Supply System for 1.5MW, 40MHz, RF Amplifier","authors":"P. Khilar, A. Makwana, J. Soni, K. Parmar, K. Sathyanarayana, Y. Srinivas, M. Kushwah, D. Bora","doi":"10.1109/MODSYM.2006.365233","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365233","url":null,"abstract":"A 1.5 MW RF (ap40 MHz) amplifier using Eima tetrode 4CM2500KG is in the testing phase, here at Institute for Plasma Research (IPR). This amplifier is being developed for the ion cyclotron resonance heating (ICRH) system of Super Conducting Steady State Tokamak, SST1. This RF amplifier amplifies an input power of 200 kW to about 1.5 MW. Few DC power supplies are needed for the operation of this amplifier such as plate supply, screen supply, filament supply, and grid supply. We have a conventional HVDC power supply rated for 60 Kv@10 A for the preliminary testing of this RF amplifier. The required RHVPS (25 Kv@120 A) for this amplifier is under development, hence it is beyond the scope of this paper. This amplifier needs about 10 kW (15 V@650 A) of DC power for heating its filament. We have developed a DC power supply of 12kW (15 V@800 A) to feed the heater. Also, the amplifier needs about 4 kW (500 V@8 ADC) and 6 kW (1500 V@4 A) of DC power to feed its control grid and the screen grid, respectively. So, we have developed another two DC power supplies capable of delivering 6 kW (600 V@10 A) and 7.5 kW (1500 V@5 A) to bias the control grid and screen grid of this amplifier, respectively. These power supplies are to be remotely operated from a PC located at a distance of about 20 to 50 meters. Also, there are some interlocks needed among these power supplies and with the plate HVDC power supply, for the stable and safe operation of the amplifier. In this paper, the test results of all these power supplies on a dummy load will be presented","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129922332","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}
Pub Date : 2006-05-14DOI: 10.1109/MODSYM.2006.365261
M. McQuage, V. McDowell, F. Peterkin, J. Pasour
Power modulators for compact, repetitive systems are continually faced with new requirements as the corresponding system objectives increase. Changes in pulse rate frequency or number of pulses significantly impact the design of the power conditioning system. In order to meet future power supply requirements, we have developed several high voltage (HV) capacitor charging power supplies (CCPS). This effort focuses on a volume of 6" x 6" x 14" and a weight of 25 lbs. The primary focus was to increase the effective capacitor charge rate, or power output, for the given size and weight. Although increased power output was the principal objective, efficiency and repeatability were also considered. A number of DC-DC converter topologies were compared to determine the optimal design. In order to push the limits of output power, numerous resonant converter parameters were examined. Comparisons of numerous topologies, HV transformers and rectifiers, and switching frequency ranges are presented. The impacts of the control system and integration requirements are also considered.
{"title":"High Power Density Capacitor Charging Power Supply Development for Repetitive Pulsed Power","authors":"M. McQuage, V. McDowell, F. Peterkin, J. Pasour","doi":"10.1109/MODSYM.2006.365261","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365261","url":null,"abstract":"Power modulators for compact, repetitive systems are continually faced with new requirements as the corresponding system objectives increase. Changes in pulse rate frequency or number of pulses significantly impact the design of the power conditioning system. In order to meet future power supply requirements, we have developed several high voltage (HV) capacitor charging power supplies (CCPS). This effort focuses on a volume of 6\" x 6\" x 14\" and a weight of 25 lbs. The primary focus was to increase the effective capacitor charge rate, or power output, for the given size and weight. Although increased power output was the principal objective, efficiency and repeatability were also considered. A number of DC-DC converter topologies were compared to determine the optimal design. In order to push the limits of output power, numerous resonant converter parameters were examined. Comparisons of numerous topologies, HV transformers and rectifiers, and switching frequency ranges are presented. The impacts of the control system and integration requirements are also considered.","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129742158","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}
Pub Date : 2006-05-14DOI: 10.1109/MODSYM.2006.365171
J. Krile, A. Neuber, G. Edmiston, H. Krompholz
Flashover along insulators or insulating support structures has to be carefully addressed in the design of any DC, AC, or pulsed high voltage device. Although there is a large body of data on unipolar surface flashover in the atmosphere, which has led to empirical design rules primarily for the power distribution industry, the physics of the involved processes is widely unknown. The major limiting factor in the transmission of high power microwaves (HPM) into the atmosphere has been the vacuum-air interface. Both the unipolar and HPM surface flashover cases have been studied under vacuum conditions and have been found to have the same dominant mechanisms. Similarities between HPM window flashover on the air side and unipolar flashover are observed in an atmospheric environment as well
{"title":"Surface Flashover under RF and Unipolar Excitation at Atmospheric Conditions","authors":"J. Krile, A. Neuber, G. Edmiston, H. Krompholz","doi":"10.1109/MODSYM.2006.365171","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365171","url":null,"abstract":"Flashover along insulators or insulating support structures has to be carefully addressed in the design of any DC, AC, or pulsed high voltage device. Although there is a large body of data on unipolar surface flashover in the atmosphere, which has led to empirical design rules primarily for the power distribution industry, the physics of the involved processes is widely unknown. The major limiting factor in the transmission of high power microwaves (HPM) into the atmosphere has been the vacuum-air interface. Both the unipolar and HPM surface flashover cases have been studied under vacuum conditions and have been found to have the same dominant mechanisms. Similarities between HPM window flashover on the air side and unipolar flashover are observed in an atmospheric environment as well","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115475498","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}
Pub Date : 2006-05-14DOI: 10.1109/MODSYM.2006.365322
P. Sarkar, B. Novac, I. Smith, R.A. Miller, R. M. Craven, S. Braidwood
High power electromagnetic pulses are of importance in a variety of applications such as transient radar, when investigating the effect of strong radio-frequency impulses on electronic systems and modern bio-medical technology. The paper presents details for a compact, battery powered, repetitive pulser, which is capable of producing nanosecond rise-time pulses at voltages exceeding 0.5 MV. The system is based on a Tesla transformer operating in a dual-resonance mode, with a high energy transfer efficiency between the primary and secondary circuits. To obtain a high pulse repetition frequency of at least 1 kHz, the key component is a closing switch in the primary circuit working on the principle of corona stabilization
{"title":"A High Repetition Rate Battery-Powered 0.5 MV Pulser for Ultrawideband Radiation","authors":"P. Sarkar, B. Novac, I. Smith, R.A. Miller, R. M. Craven, S. Braidwood","doi":"10.1109/MODSYM.2006.365322","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365322","url":null,"abstract":"High power electromagnetic pulses are of importance in a variety of applications such as transient radar, when investigating the effect of strong radio-frequency impulses on electronic systems and modern bio-medical technology. The paper presents details for a compact, battery powered, repetitive pulser, which is capable of producing nanosecond rise-time pulses at voltages exceeding 0.5 MV. The system is based on a Tesla transformer operating in a dual-resonance mode, with a high energy transfer efficiency between the primary and secondary circuits. To obtain a high pulse repetition frequency of at least 1 kHz, the key component is a closing switch in the primary circuit working on the principle of corona stabilization","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115436797","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}
Pub Date : 2006-05-14DOI: 10.1109/MODSYM.2006.365306
W. J. Sarjeant, A. Halstead, K. Burke, R. Lange, J. Marian, H. Moore
Exploding films have a variety of potential applications including current interrupters, ignition of energetic materials, and sources of intense light. However, characterization of these events remains a challenge as the average duration of an event is only on the order of 100 mus in our studies. An effort to obtain a complete understanding of the exploding film and plasma generation phenomena is underway. This paper investigates the spectral and electrical output of exploding film events on metallized polypropylene film samples. Assuming the plasma generated from the exploding film is a blackbody radiator, peak temperature can be estimated using trends of wavelength versus intensity. This data allows for a more accurate characterization of the plasma that results from the exploding films. A holistic understanding of the deterministic mechanisms of the plasma enables future controllability and tunability in exploding film applications.
{"title":"Characterization of Exploding Film Plasmas Using Emission Spectroscopy","authors":"W. J. Sarjeant, A. Halstead, K. Burke, R. Lange, J. Marian, H. Moore","doi":"10.1109/MODSYM.2006.365306","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365306","url":null,"abstract":"Exploding films have a variety of potential applications including current interrupters, ignition of energetic materials, and sources of intense light. However, characterization of these events remains a challenge as the average duration of an event is only on the order of 100 mus in our studies. An effort to obtain a complete understanding of the exploding film and plasma generation phenomena is underway. This paper investigates the spectral and electrical output of exploding film events on metallized polypropylene film samples. Assuming the plasma generated from the exploding film is a blackbody radiator, peak temperature can be estimated using trends of wavelength versus intensity. This data allows for a more accurate characterization of the plasma that results from the exploding films. A holistic understanding of the deterministic mechanisms of the plasma enables future controllability and tunability in exploding film applications.","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126842241","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}
Pub Date : 2006-05-14DOI: 10.1109/MODSYM.2006.365188
M. Serkan, H. Kirkici, K. Koppisetty
Surface flashover is a major issue in electrical insulation in power systems, both in space or atmospheric environments. In general, random emission of a small number of electrons at the cathode results in positive charging of the dielectric surface at the triple junction, thus initiating surface flashover across the dielectric. Developments in nano-particulate and nano-dielectric materials and effects of nano-scale fillers on electrical, thermal and mechanical properties of polymeric materials have been observed. In this paper, we present experimental results of surface flashover characteristics of epoxy resin and epoxy resin cast with powdered Al2O3 in partial vacuum. The flashover experiments are conducted with DC, AC and repetitive pulsed signals separately. Surface flashover voltage and current waveforms and light emission data with PMT were recorded. The samples used in the experiments were produced by using either epoxy resin of known properties, or by mixing known quantities of Al2O3 with epoxy. The electrode material placed over the dielectric samples was copper
{"title":"Surface Flashover Characteristics of Nano-Composite Dielectric Materials Under DC and Pulsed Signals in Partial Vacuum","authors":"M. Serkan, H. Kirkici, K. Koppisetty","doi":"10.1109/MODSYM.2006.365188","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365188","url":null,"abstract":"Surface flashover is a major issue in electrical insulation in power systems, both in space or atmospheric environments. In general, random emission of a small number of electrons at the cathode results in positive charging of the dielectric surface at the triple junction, thus initiating surface flashover across the dielectric. Developments in nano-particulate and nano-dielectric materials and effects of nano-scale fillers on electrical, thermal and mechanical properties of polymeric materials have been observed. In this paper, we present experimental results of surface flashover characteristics of epoxy resin and epoxy resin cast with powdered Al2O3 in partial vacuum. The flashover experiments are conducted with DC, AC and repetitive pulsed signals separately. Surface flashover voltage and current waveforms and light emission data with PMT were recorded. The samples used in the experiments were produced by using either epoxy resin of known properties, or by mixing known quantities of Al2O3 with epoxy. The electrode material placed over the dielectric samples was copper","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"374 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114879249","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}
Pub Date : 2006-05-14DOI: 10.1109/MODSYM.2006.365184
J.L. Rush
The ability to eliminate or minimize defects in high voltage wire can help in extending system reliability by eliminating or minimizing sources of partial discharge. Partial discharge testing of single conductor wire is traditionally performed on discrete lengths of wire or wires terminated to connectors. However, when excessive partial discharge is detected in completed assemblies, expensive rework is the result. Eliminating defects, prior to connector termination and testing, would be beneficial. Existing partial discharge detection methods of wire require the termination of fixed lengths to temporary test connectors. The wire must have a braided shield or similar ground conductor placed around its outer diameter and fixed to the connector. These test connector terminations must be constructed carefully, since discharges resulting from poor terminations cannot easily be differentiated from discharges produced within the wire. Additionally, discharges found within the wire cannot always be localized for removal. A method is presented for partial discharge pulse detection in continuous length wires. Detection of partial discharges may indicate the presence of electrical insulation defects which may result in overstressing by an electric field and/or the occurrence of transient gas ionization, which will erode the insulation and ultimately lead to a reduction in wire reliability and life. This test method offers the advantage of locating wire insulation defects in process, such as small voids, fractures, and separations prior to termination which then can be cut from the spool of wire or otherwise identified. Electrostatic models of the system are analyzed and testing results are discussed related to fluoropolymer insulated wires. A conductor cleaning process and optical detection apparatus, intended to minimize or identify insulation defects caused by contamination, is also presented
{"title":"Partial Discharge Detection of Continuous Length Wire","authors":"J.L. Rush","doi":"10.1109/MODSYM.2006.365184","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365184","url":null,"abstract":"The ability to eliminate or minimize defects in high voltage wire can help in extending system reliability by eliminating or minimizing sources of partial discharge. Partial discharge testing of single conductor wire is traditionally performed on discrete lengths of wire or wires terminated to connectors. However, when excessive partial discharge is detected in completed assemblies, expensive rework is the result. Eliminating defects, prior to connector termination and testing, would be beneficial. Existing partial discharge detection methods of wire require the termination of fixed lengths to temporary test connectors. The wire must have a braided shield or similar ground conductor placed around its outer diameter and fixed to the connector. These test connector terminations must be constructed carefully, since discharges resulting from poor terminations cannot easily be differentiated from discharges produced within the wire. Additionally, discharges found within the wire cannot always be localized for removal. A method is presented for partial discharge pulse detection in continuous length wires. Detection of partial discharges may indicate the presence of electrical insulation defects which may result in overstressing by an electric field and/or the occurrence of transient gas ionization, which will erode the insulation and ultimately lead to a reduction in wire reliability and life. This test method offers the advantage of locating wire insulation defects in process, such as small voids, fractures, and separations prior to termination which then can be cut from the spool of wire or otherwise identified. Electrostatic models of the system are analyzed and testing results are discussed related to fluoropolymer insulated wires. A conductor cleaning process and optical detection apparatus, intended to minimize or identify insulation defects caused by contamination, is also presented","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127585867","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}
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