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Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting最新文献

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A pulsed corona-Townsend method for measurement of electron/ion number ratios and drift velocities 测量电子/离子数比和漂移速度的脉冲电晕-汤森德方法
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting Pub Date : 1992-10-04 DOI: 10.1109/IAS.1992.244395
J. S. Clements, R.E. Williams
{"title":"A pulsed corona-Townsend method for measurement of electron/ion number ratios and drift velocities","authors":"J. S. Clements, R.E. Williams","doi":"10.1109/IAS.1992.244395","DOIUrl":"https://doi.org/10.1109/IAS.1992.244395","url":null,"abstract":"An easily implemented method based on the pulsed-corona-Townsend technique has been developed to measure drift velocities of charge carriers in a corona discharge at atmospheric pressure. The method also yields the electron/ion number ratio and an upper limit on the value of the electron attachment coefficient. Approximate electron drift velocities measured in nitrogen are in agreement with known values. In addition, the negative ion mobility obtained in nitrogen containing small amounts of oxygen agrees with known data. Therefore, the technique can be used to obtain data for gas mixture of practical interest. The method can also be used to distinguish the charge carriers in a corona discharge.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114786284","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: 8
Contrast potential, an assessment technique using large solid angle illuminance measurements 对比电位，一种使用大立体角照度测量的评估技术
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting Pub Date : 1992-10-04 DOI: 10.1109/IAS.1992.244536
M. Siminovitch, M. Navvab, H. Kowalewski
{"title":"Contrast potential, an assessment technique using large solid angle illuminance measurements","authors":"M. Siminovitch, M. Navvab, H. Kowalewski","doi":"10.1109/IAS.1992.244536","DOIUrl":"https://doi.org/10.1109/IAS.1992.244536","url":null,"abstract":"The authors describe a technique for assessing the luminous contrast within lighting environments. This technique uses large solid angle measurements of both vertical and horizontal illuminance on the work plane, and is based on combining the horizontal and vertical illuminance measurements with a simple expression. This illuminance function was compared with the luminance contrast measurements obtained with a luminance contrast meter. Analysis of the experimental data indicates a strong correlation between the illuminance-based procedure and data obtained with the meter. The assessment of contrast based on large solid angle measurements of illuminance is also described.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115265204","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
High speed electrostatic surface discharge between a charged thin film and a sphere electrode with or without a thin dielectric film on that 带电薄膜和球面电极之间的高速静电表面放电，球面电极上有或没有薄介电膜
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting Pub Date : 1992-10-04 DOI: 10.1109/IAS.1992.244246
T. Oda, Y. Sakai
{"title":"High speed electrostatic surface discharge between a charged thin film and a sphere electrode with or without a thin dielectric film on that","authors":"T. Oda, Y. Sakai","doi":"10.1109/IAS.1992.244246","DOIUrl":"https://doi.org/10.1109/IAS.1992.244246","url":null,"abstract":"The electrostatic surface discharge (ESD) between a charged thin dielectric film on a conductive flat plate electrode and a sphere electrode that is connected to the plate, and is either covered with an uncharged thin dielectric film or fare, was observed. Discharge current waveform, discharge gap length, current risetime, discharge photographs, current peak value, etc. were recorded. The initial charge generation by irradiation with beta-rays or ultraviolet light was not readily apparent, so that the reproducibility of ESD experiments was not much improved. The charging polarity dependence of such a surface ESD between two dielectric films becomes small with increasing film thickness. The discharge gap length of an ESD with an 12.5 mu m uncharged film on the electrode reduces to 50 or 70% of that between a charged film and a sphere metal electrode. Peak current and transferred charge value of such an ESD also decreases to roughly one-third of that between the film and the electrode.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115191844","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
Fuzzy controller for inverter fed induction machines 变频感应电机模糊控制器
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting Pub Date : 1992-10-04 DOI: 10.1109/IAS.1992.244359
S. Mir, D. Zinger, M. Elbuluk
{"title":"Fuzzy controller for inverter fed induction machines","authors":"S. Mir, D. Zinger, M. Elbuluk","doi":"10.1109/IAS.1992.244359","DOIUrl":"https://doi.org/10.1109/IAS.1992.244359","url":null,"abstract":"A fuzzy logic controller for direct self-control of an induction machine is presented. A response faster than that of the conventional direct self-controller during startup and during a step change in torque is achieved. To improve the system performance at low speeds a fuzzy resistance estimator is proposed to eliminate the error due to the change in stator resistance. At constant flux and torque commands any change in stator resistance of the induction machines causes an error in stator current. This error is utilized by the fuzzy resistance estimator to correct the stato resistance used by the controller to match the machine resistance. Both fuzzy controller and fuzzy resistance estimator are simulated for a 3 hp induction motor. The simulation results demonstrate good performance.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115171424","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: 176
Joint ventures in energetic plants 合资经营能源工厂
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting Pub Date : 1992-10-04 DOI: 10.1109/IAS.1992.244404
W. Malewicz
{"title":"Joint ventures in energetic plants","authors":"W. Malewicz","doi":"10.1109/IAS.1992.244404","DOIUrl":"https://doi.org/10.1109/IAS.1992.244404","url":null,"abstract":"Industrial power plants located in one area are frequently equipped with their own boiler installations when one common boiler installation serving several industrial customers, i.e. a joint venture could be more advantageous. The author carries out an economic analysis of such an installation, comparing it with separate plants. Differences in construction costs, fixed costs, and variable costs are considered, and the economic advantages of a common boiler installation are discussed. A simplified scheme for a combined plant for generating electric and thermal power is presented as an example.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115293267","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
Vector control of delta inverter 增量逆变器的矢量控制
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting Pub Date : 1992-10-04 DOI: 10.1109/IAS.1992.244431
A. Trzynadlowski, S. Legowski
{"title":"Vector control of delta inverter","authors":"A. Trzynadlowski, S. Legowski","doi":"10.1109/IAS.1992.244431","DOIUrl":"https://doi.org/10.1109/IAS.1992.244431","url":null,"abstract":"The principle of vector control was investigated for a three-switch delta inverter. The vector pulse width modulation (PWM) techniques, both in the deterministic and random versions, were compared with the traditional sinusoidal PWM strategy. The achieved enhancement of the operation of the delta inverter has been documented by results of computer simulations and an experimental investigation of a laboratory model. The study confirmed the superiority of the vector PWM techniques over the sinusoidal PWM strategy for a delta inverter. However, the improvement in the operating characteristics of the inverter is not as significant as that witnessed in bridge inverters. The random version of the vector PWM technique results in radically better harmonic profiles of the output voltage and current than those with the deterministic version.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121548176","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
Faraday pail with self regulating ion repulsion 具有自调节离子斥力的法拉第桶
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting Pub Date : 1992-10-04 DOI: 10.1109/IAS.1992.244388
I. Inculet, G. Castle
{"title":"Faraday pail with self regulating ion repulsion","authors":"I. Inculet, G. Castle","doi":"10.1109/IAS.1992.244388","DOIUrl":"https://doi.org/10.1109/IAS.1992.244388","url":null,"abstract":"Measurements of charge-to-mass ratios of paint powders applied electrostatically with corona guns are often subject to error because ions are collected at the same time as the charged powder. The authors present the results of tests with a Faraday pail with self-regulating ion repulsion, using a Teflon shield with holes mounted between the corona painting gun and the pail. The shield acquires a high surface charge from the ionic bombardment. When the charge reaches a saturation level, it repels the ionic bombardment almost completely and only powder is entrained in the Faraday pail in the flow. The calculated charge-to-mass ratios of silica dust powder with and without the Teflon shield are shown. Without the Teflon shield and without taking into consideration the free ionic current which reaches the Faraday pail, the charge-to-mass ratios are shown to be one order of magnitude higher than the true charge-to-mass ratio values.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123390555","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
Mill building grounding system retrofit 厂房接地系统改造
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting Pub Date : 1992-10-04 DOI: 10.1109/IAS.1992.244210
D.R. Blair
{"title":"Mill building grounding system retrofit","authors":"D.R. Blair","doi":"10.1109/IAS.1992.244210","DOIUrl":"https://doi.org/10.1109/IAS.1992.244210","url":null,"abstract":"The author discusses an approach to retrofitting a new electrical grounding system to an existing industrial building when confidence has been lost in the integrity of the original system. He points out the near impossibility of measuring the resistance of a large grounding grid. The solution to this problem is described.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124404523","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
Synchronous machine parameter identification by a multi-time scale technique 基于多时间尺度技术的同步电机参数辨识
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting Pub Date : 1992-10-04 DOI: 10.1109/IAS.1992.244297
O. Touhami, H. Guesbaoui, C. Iung
{"title":"Synchronous machine parameter identification by a multi-time scale technique","authors":"O. Touhami, H. Guesbaoui, C. Iung","doi":"10.1109/IAS.1992.244297","DOIUrl":"https://doi.org/10.1109/IAS.1992.244297","url":null,"abstract":"The authors propose a novel method for synchronous machine parameter identification. They use the multi-time-scale decompositions to reduce the operational reactances. The identification method is based on the frequency responses. The synchronous machine is at standstill and supplied by pseudorandom binary sequence voltages. The output data are the currents in the windings. All the Park's model parameters of an alternator of 13.5 kVA/19.5 A/50 Hz are estimated by an autoregressive external input model structure.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124779124","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: 22
Kinetics of charging of drops formed from a stimulated jet of conducting liquid 受刺激的导电液体射流形成的液滴的充电动力学
Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting Pub Date : 1992-10-04 DOI: 10.1109/IAS.1992.244258
S. Oliveri, P. Atten
{"title":"Kinetics of charging of drops formed from a stimulated jet of conducting liquid","authors":"S. Oliveri, P. Atten","doi":"10.1109/IAS.1992.244258","DOIUrl":"https://doi.org/10.1109/IAS.1992.244258","url":null,"abstract":"The capillary instability of a circular liquid jet leads to the formation of liquid drops. By imposing a suitable initial perturbation it is possible obtain identical drops. In the case of an electrically conducting liquid, these drops can be individually and differently charged and subsequently separated by a constant electric field. For charging, one electrode is the conducting jet itself, connected to ground by the tank, and the other one is assumed here to be a coaxial metallic cylinder. The authors focus mainly on the kinetics of charging when a step voltage is applied to the external cylindrical electrode. A model that predicts the potential of the drop versus time after application of a voltage step, for a given shape of the jet is proposed. The time required for fully charging a drop is evaluated, and the influence of a delay in the application of charging voltage is examined.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125187259","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
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