Pub Date : 2006-10-01DOI: 10.1109/CEIDP.2006.312044
A. Hashem, M. Abdel-Salam, A. Turky, A. Abdel-Aziz
This paper is aimed at investigating how the DC corona performance of conductor-to-plane gaps as influenced by a floating grid of metallic parallel wires underneath and parallel to the stressed conductor. The corona current-voltage and corona current density distribution at ground level are studied experimentally with and without floating grids. The wire-to-wire spacing, number, lateral distribution and height of grid wires are varied. It is found that the number and distribution of grid wires are the major factors that influence the corona onset voltage.
{"title":"Corona Characteristics in Conductor-to-Plane Gaps as Influenced by Nearby Floating Metallic Grids","authors":"A. Hashem, M. Abdel-Salam, A. Turky, A. Abdel-Aziz","doi":"10.1109/CEIDP.2006.312044","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312044","url":null,"abstract":"This paper is aimed at investigating how the DC corona performance of conductor-to-plane gaps as influenced by a floating grid of metallic parallel wires underneath and parallel to the stressed conductor. The corona current-voltage and corona current density distribution at ground level are studied experimentally with and without floating grids. The wire-to-wire spacing, number, lateral distribution and height of grid wires are varied. It is found that the number and distribution of grid wires are the major factors that influence the corona onset voltage.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122333137","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 : 2006-10-01DOI: 10.1109/CEIDP.2006.311980
H. Ding, Z. Wang
This paper describes briefly various different degradation kinetic models of cellulose and paper insulation in the literature and presents a new cumulative degradation kinetic model for loss of tensile strength of cellulose and paper insulation. Applying this model, the predicted loss of tensile strength has been compared with accelerated ageing data of Kraft paper obtained from the publications of McShane et al. of Cooper Power System. McShane et al. conducted the ageing of Kraft paper in both mineral oil and natural ester in sealed tube at elevated temperatures. It is shown that the cumulative degradation kinetic model for loss of tensile strength of paper insulation can give an excellent description of the ageing process of Kraft paper insulation in both natural ester dielectric fluid and mineral transformer oil.
本文简要介绍了文献中纤维素和纸绝缘材料的各种降解动力学模型，提出了一种新的纤维素和纸绝缘材料抗拉强度损失的累积降解动力学模型。应用该模型，将预测的抗拉强度损失与从Cooper Power System的McShane等人的出版物中获得的卡夫纸加速老化数据进行了比较。McShane等人在密封管中对牛皮纸进行了矿物油和天然酯的高温老化。结果表明，纸绝缘抗拉强度损失的累积降解动力学模型可以很好地描述牛皮纸绝缘在天然酯介质和矿物变压器油中的老化过程。
{"title":"Kinetic analysis and modelling of the ageing process for Kraft paper aged in natural ester dielectric fluid","authors":"H. Ding, Z. Wang","doi":"10.1109/CEIDP.2006.311980","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.311980","url":null,"abstract":"This paper describes briefly various different degradation kinetic models of cellulose and paper insulation in the literature and presents a new cumulative degradation kinetic model for loss of tensile strength of cellulose and paper insulation. Applying this model, the predicted loss of tensile strength has been compared with accelerated ageing data of Kraft paper obtained from the publications of McShane et al. of Cooper Power System. McShane et al. conducted the ageing of Kraft paper in both mineral oil and natural ester in sealed tube at elevated temperatures. It is shown that the cumulative degradation kinetic model for loss of tensile strength of paper insulation can give an excellent description of the ageing process of Kraft paper insulation in both natural ester dielectric fluid and mineral transformer oil.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124757418","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 : 2006-10-01DOI: 10.1109/CEIDP.2006.312023
Caixin Sun, Jian Li, Xiaohu Li, S. Grzybowski
This paper presents the electric properties of a type of refined rapeseed oil, which can be used as transformer oil. The lifetime of the rapeseed oil-immersed paper is estimated by performing the step-stress test. Two Weibull parameters are used for statistical analysis of mean lifetime of oil-paper specimen. The mathematic models, the inverse power model, and the exponential model are used to fit test data and to calculate voltage endurance coefficients. As a contrast sample, the step-stress test is also performed on the mineral oil-immersed paper specimen. Analysis results show that the rapeseed oil-immersed paper has longer lifetime than mineral oil-immersed paper.
{"title":"Electric Properties of Vegetable Oil-Based Dielectric Liquid and Lifetime Estimation of the Oil-Paper Insulation","authors":"Caixin Sun, Jian Li, Xiaohu Li, S. Grzybowski","doi":"10.1109/CEIDP.2006.312023","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312023","url":null,"abstract":"This paper presents the electric properties of a type of refined rapeseed oil, which can be used as transformer oil. The lifetime of the rapeseed oil-immersed paper is estimated by performing the step-stress test. Two Weibull parameters are used for statistical analysis of mean lifetime of oil-paper specimen. The mathematic models, the inverse power model, and the exponential model are used to fit test data and to calculate voltage endurance coefficients. As a contrast sample, the step-stress test is also performed on the mineral oil-immersed paper specimen. Analysis results show that the rapeseed oil-immersed paper has longer lifetime than mineral oil-immersed paper.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"31 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130376795","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 : 2006-10-01DOI: 10.1109/CEIDP.2006.312103
G. Gurumurthy, M. Ansari, J. Amarnath, N. Kishore
Voltage distribution across power transformer winding sections to fast front time surge voltages such as lightning overvoltages can be controlled by providing suitable metal oxide surge absorber (MOA) blocks across these sections. The voltage V, relating to current I through a surge absorber block is given by the equation V = KIbeta (K and beta are constants for the MOA blocks). Computer simulations have been carried out to analyze effect of providing MOA blocks on different sections of power transformer winding. High voltage windings having 'alpha' (Square root of ratio of total ground capacitance to total series capacitance) values 6, 12 and 18 have been analyzed. Initially, several variations were carried out in the computer simulations to investigate whether MOA blocks could be provided across first few sections of windings only. All these investigations indicated that such an arrangement transfers high electrical stresses to sections across which the surge absorber blocks are not provided. In addition these investigations have shown that by providing MOA blocks on each of the sections of the entire winding can only result in considerable reduction of stresses for fast transient voltages. The results have also shown that, for a values 6, 12 and 18 the maximum voltage stress across a section of winding without MOA blocks can be 35%, 51% and 68% respectively and these values with MOA blocks across sections is limited to between 23% to 24%.
{"title":"Surge voltage stresses across power transformer winding sections provided with metal oxide surge absorber blocks","authors":"G. Gurumurthy, M. Ansari, J. Amarnath, N. Kishore","doi":"10.1109/CEIDP.2006.312103","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312103","url":null,"abstract":"Voltage distribution across power transformer winding sections to fast front time surge voltages such as lightning overvoltages can be controlled by providing suitable metal oxide surge absorber (MOA) blocks across these sections. The voltage V, relating to current I through a surge absorber block is given by the equation V = KIbeta (K and beta are constants for the MOA blocks). Computer simulations have been carried out to analyze effect of providing MOA blocks on different sections of power transformer winding. High voltage windings having 'alpha' (Square root of ratio of total ground capacitance to total series capacitance) values 6, 12 and 18 have been analyzed. Initially, several variations were carried out in the computer simulations to investigate whether MOA blocks could be provided across first few sections of windings only. All these investigations indicated that such an arrangement transfers high electrical stresses to sections across which the surge absorber blocks are not provided. In addition these investigations have shown that by providing MOA blocks on each of the sections of the entire winding can only result in considerable reduction of stresses for fast transient voltages. The results have also shown that, for a values 6, 12 and 18 the maximum voltage stress across a section of winding without MOA blocks can be 35%, 51% and 68% respectively and these values with MOA blocks across sections is limited to between 23% to 24%.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":" 47","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120831668","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 : 2006-10-01DOI: 10.1109/CEIDP.2006.312094
R. Chicón, A.T. Perez
The electrohydrodynamic (EHD) instability of an insulating liquid subjected to unipolar injection of ions has been the object of many different studies. It is due to the existence of a potentially unstable distribution of charge in the liquid bulk. Besides that classical instability, it has also been found experimentally that insulating liquids exhibit another kind of EHD instability when subjected to corona discharge from air. This instability, referred to as rose-window instability, is characterized by a pattern of large cells. Both instabilities arise above quite different voltage thresholds. In this paper we write down and numerically solve the linearized equations of motion of the liquid when the air above is considered. Our first aim is to discuss the effect of the air layer on the linear stability threshold for the classical EHD volume instability.
{"title":"Linear stability of an interface between a non-ohmic liquid and air subjected to an electric field and charge injection","authors":"R. Chicón, A.T. Perez","doi":"10.1109/CEIDP.2006.312094","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312094","url":null,"abstract":"The electrohydrodynamic (EHD) instability of an insulating liquid subjected to unipolar injection of ions has been the object of many different studies. It is due to the existence of a potentially unstable distribution of charge in the liquid bulk. Besides that classical instability, it has also been found experimentally that insulating liquids exhibit another kind of EHD instability when subjected to corona discharge from air. This instability, referred to as rose-window instability, is characterized by a pattern of large cells. Both instabilities arise above quite different voltage thresholds. In this paper we write down and numerically solve the linearized equations of motion of the liquid when the air above is considered. Our first aim is to discuss the effect of the air layer on the linear stability threshold for the classical EHD volume instability.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121353050","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 : 2006-10-01DOI: 10.1541/IEEJIAS.127.1141
K. Wada, K. Tsuji, H. Muto, O. Yashiro
In inverter-fed motor systems, output voltage of the inverter has a rectangular waveform with rise time of a few tens of nanoseconds, and consequently the motor suffers from repetitive surge pulses which may have adverse effect on motor insulation. The behavior of surge pulses should be clarified to devise the optimum insulation design of a motor. We have investigated how the cable structure and grounding wire connecting the inverter and motor, affects the surge behavior with particular regard to peak voltage between phase terminal to the ground and the peak voltage across the first coil in serially connected multi coils consisting one phase. As a result, we discovered phenomena whereby, when the cross sectional structure of the cable is asymmetrical, the surge voltage of one specific phase can become higher than that of the other phases resulting from the asymmetry among the capacitances between the feeder line and ground line. We have confirmed these phenomena can be prevented by the following three methods: using cables that have symmetrical capacitance to ground among three phases (e.g., a three-phase shielded cable), providing the grounding wire as a separate cable to reduce capacitance between the feeder line and grounding wire, inserting capacitors at motor terminals or inverter terminals to cancel out capacitive asymmetry.
{"title":"Effect of cabling and grounding configuration on surge voltages in inverter-fed motors","authors":"K. Wada, K. Tsuji, H. Muto, O. Yashiro","doi":"10.1541/IEEJIAS.127.1141","DOIUrl":"https://doi.org/10.1541/IEEJIAS.127.1141","url":null,"abstract":"In inverter-fed motor systems, output voltage of the inverter has a rectangular waveform with rise time of a few tens of nanoseconds, and consequently the motor suffers from repetitive surge pulses which may have adverse effect on motor insulation. The behavior of surge pulses should be clarified to devise the optimum insulation design of a motor. We have investigated how the cable structure and grounding wire connecting the inverter and motor, affects the surge behavior with particular regard to peak voltage between phase terminal to the ground and the peak voltage across the first coil in serially connected multi coils consisting one phase. As a result, we discovered phenomena whereby, when the cross sectional structure of the cable is asymmetrical, the surge voltage of one specific phase can become higher than that of the other phases resulting from the asymmetry among the capacitances between the feeder line and ground line. We have confirmed these phenomena can be prevented by the following three methods: using cables that have symmetrical capacitance to ground among three phases (e.g., a three-phase shielded cable), providing the grounding wire as a separate cable to reduce capacitance between the feeder line and grounding wire, inserting capacitors at motor terminals or inverter terminals to cancel out capacitive asymmetry.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115122196","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 : 2006-10-01DOI: 10.1109/CEIDP.2006.312038
F. Aymonino, T. Lebey, D. Malec, C. Petit, J. Saint Michel, A. Anton
Due to a power density increase, the thermal stresses endured by the electrical insulation of rotating machines are also increasing. However, up to now, most of the characterization (breakdown voltage, permittivity, loss tangent) are carried out in a temperature range which rarely exceeds the thermal class. Consequently, there is a lack of knowledge on the behavior of these materials when they are submitted to temperatures which may reach 50 degC above their thermal class. In this paper, experimental results regarding the electrical behavior of enamels (varnished or not) are presented and discussed. Hence, permittivity and loss tangent are measured from room temperature to 350 degC in the frequency range of 50 Hz-100 kHz. The samples consist in 50 mum films of various polymers (polyester-imide, polyamide-imide) deposited on different conductive plates (copper, stainless steel). To find the impact of the interfaces, some samples are composed of two insulating layers (same or different varnishes). The differences observed between the different polymers are correlated to their chemical structures
{"title":"Dielectrics measurements of rotating machines insulation at high temperature (200-400°C)","authors":"F. Aymonino, T. Lebey, D. Malec, C. Petit, J. Saint Michel, A. Anton","doi":"10.1109/CEIDP.2006.312038","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312038","url":null,"abstract":"Due to a power density increase, the thermal stresses endured by the electrical insulation of rotating machines are also increasing. However, up to now, most of the characterization (breakdown voltage, permittivity, loss tangent) are carried out in a temperature range which rarely exceeds the thermal class. Consequently, there is a lack of knowledge on the behavior of these materials when they are submitted to temperatures which may reach 50 degC above their thermal class. In this paper, experimental results regarding the electrical behavior of enamels (varnished or not) are presented and discussed. Hence, permittivity and loss tangent are measured from room temperature to 350 degC in the frequency range of 50 Hz-100 kHz. The samples consist in 50 mum films of various polymers (polyester-imide, polyamide-imide) deposited on different conductive plates (copper, stainless steel). To find the impact of the interfaces, some samples are composed of two insulating layers (same or different varnishes). The differences observed between the different polymers are correlated to their chemical structures","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123084477","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 : 2006-10-01DOI: 10.1109/CEIDP.2006.312081
V. Griseri, C. Perrin, K. Fukunaga, T. Maeno, B. Dirassen, D. Payan, C. Laurent
Various types of polymeric films can be found in satellites and especially in the main body. Among them, the polyimide type Upilexreg is often selected as it is offering high temperature resistance. However, due to its nature it can get charged and store polarized particles on the surface or in bulk up to a critical level. During the irradiation the built up of charges is followed by the pulsed electro-acoustic (PEA) method. The aim of this work is to get a better understanding on charge storage, conduction processes and extraction means in dielectric films submitted to a controlled electron irradiation, to prevent catastrophic damage during flight.
{"title":"Electron irradiation effects on polymeric films studied by the pulsed electro-acoustic method","authors":"V. Griseri, C. Perrin, K. Fukunaga, T. Maeno, B. Dirassen, D. Payan, C. Laurent","doi":"10.1109/CEIDP.2006.312081","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312081","url":null,"abstract":"Various types of polymeric films can be found in satellites and especially in the main body. Among them, the polyimide type Upilexreg is often selected as it is offering high temperature resistance. However, due to its nature it can get charged and store polarized particles on the surface or in bulk up to a critical level. During the irradiation the built up of charges is followed by the pulsed electro-acoustic (PEA) method. The aim of this work is to get a better understanding on charge storage, conduction processes and extraction means in dielectric films submitted to a controlled electron irradiation, to prevent catastrophic damage during flight.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115301998","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 : 2006-10-01DOI: 10.1109/CEIDP.2006.312021
D. J. Currie, M.H. Lee, R. Todd
This work concerns the modelling of the dielectric properties of biological cell suspensions. The relative permittivity of a suspension is proportional to the volume fraction of suspended cells but it would be more useful to know the average cell radius and number density separately. A non-linear least squares algorithm, based on the Levenberg-Marquardt technique, has been developed to predict these industrially important cell features using a simple spherical shell model along with the Cole-Cole equation. A new RC circuit model of a typical cell has also been developed to try to explain the electrical properties of a cell suspension.
{"title":"Prediction of physical properties of yeast cell suspensions using dielectric spectroscopy","authors":"D. J. Currie, M.H. Lee, R. Todd","doi":"10.1109/CEIDP.2006.312021","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312021","url":null,"abstract":"This work concerns the modelling of the dielectric properties of biological cell suspensions. The relative permittivity of a suspension is proportional to the volume fraction of suspended cells but it would be more useful to know the average cell radius and number density separately. A non-linear least squares algorithm, based on the Levenberg-Marquardt technique, has been developed to predict these industrially important cell features using a simple spherical shell model along with the Cole-Cole equation. A new RC circuit model of a typical cell has also been developed to try to explain the electrical properties of a cell suspension.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"31 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131027881","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 : 2006-10-01DOI: 10.1109/CEIDP.2006.312080
W. Dang, M. Tahara, J. Taima, Y. Tanaka, R. Watanabe, T. Takada
Charge distributions in electron beam irradiated polymers are observed using the pulsed electro-acoustic (PEA) method. In space environment, bulk charge accumulation in insulating materials of a spacecraft, which is exposed in the radiation of cosmic rays, is one of remarkable problems because the accumulation may sometimes cause of the unexpected accidents followed by the static discharge. Therefore, the interaction between the irradiation of the electron beam (e-beam) and the charge accumulation in bulk of polymers is tried to investigate. To understand the characteristic of the charge accumulation and the incident e-beam, the electrical properties such as the conductivity or the mobility of the carrier in polymers should be studied. Using the simultaneous measurements of the external current and time dependent charge distribution, such properties can be evaluated. To make the simultaneous measurement system, a PEA apparatus for the measurement of the charge distribution in polymers under e-beam irradiation in vacuum condition was carried out. In this paper, the charge profile in e-beam irradiated polytetrafluoroethylene film is presented as a typical example.
{"title":"Observation of Charge Distribution in Electron Beam Irradiated Polymers using Pulsed Electro-acoustic Method","authors":"W. Dang, M. Tahara, J. Taima, Y. Tanaka, R. Watanabe, T. Takada","doi":"10.1109/CEIDP.2006.312080","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312080","url":null,"abstract":"Charge distributions in electron beam irradiated polymers are observed using the pulsed electro-acoustic (PEA) method. In space environment, bulk charge accumulation in insulating materials of a spacecraft, which is exposed in the radiation of cosmic rays, is one of remarkable problems because the accumulation may sometimes cause of the unexpected accidents followed by the static discharge. Therefore, the interaction between the irradiation of the electron beam (e-beam) and the charge accumulation in bulk of polymers is tried to investigate. To understand the characteristic of the charge accumulation and the incident e-beam, the electrical properties such as the conductivity or the mobility of the carrier in polymers should be studied. Using the simultaneous measurements of the external current and time dependent charge distribution, such properties can be evaluated. To make the simultaneous measurement system, a PEA apparatus for the measurement of the charge distribution in polymers under e-beam irradiation in vacuum condition was carried out. In this paper, the charge profile in e-beam irradiated polytetrafluoroethylene film is presented as a typical example.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130650931","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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