{"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}
{"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}
{"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}
{"title":"Considering lighting system performance and HVAC interactions in lighting retrofit analyses","authors":"E. Franconi, F. Rubinstein","doi":"10.1109/IAS.1992.244544","DOIUrl":"https://doi.org/10.1109/IAS.1992.244544","url":null,"abstract":"The performance of several typical fluorescent lighting retrofits are examined, using analysis methods of varying sophistication. It is seen that estimates of energy and lighting performance based on the simple nonapplication-specific data generally available tend to overestimate the energy savings obtained with the various retrofits by 10-30%. Adding a simple correction to account for cooling benefits exacerbates the error unless heating penalties are also considered. An analysis that takes into account the thermal application factor of the lighting system shows that the error is typically due to systematically overestimating the energy usage of the original lighting system. If the thermal application factor is considered, then detailed HVAC calculations do not significantly improve the energy savings estimate.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"36 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":"124819584","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}
{"title":"AC current regulator for asynchronous drives with PRM modulator","authors":"R. D. Di Stefano, P. Marino, M. Scarano, F. Vasca","doi":"10.1109/IAS.1992.244348","DOIUrl":"https://doi.org/10.1109/IAS.1992.244348","url":null,"abstract":"A pulse ratio modulated current regulator for AC motor drives is proposed. The control scheme is realized by employing a pulse ratio modulator (PRM) and a linear time-varying proportional plus derivative (PD) regulator. The proposed scheme is equivalent to a hysteresis current regulator but does not need a large bandwidth current transducer. The mathematical model and the commutation features of the PRM, in static and dynamic conditions, are presented. Simulation results of 3 kW AC drive are reported.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"24 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":"123606609","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}
{"title":"Exact voltage drop calculations","authors":"R. J. Titus","doi":"10.1109/IAS.1992.244399","DOIUrl":"https://doi.org/10.1109/IAS.1992.244399","url":null,"abstract":"The derivation of the IEEE STD 141-1986 exact voltage drop formula is presented to correct an existing error in the standard. A updated and more accurate formula for calculating a voltage drop is then presented as a proposed replacement to the current standard's formula. The two methods are contrasted with an example from an industrial application.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"2016 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":"121611835","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}
{"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}
{"title":"Comparison of multiresonant half-bridge DC-DC converters for high voltage and high output power","authors":"U. Kirchenberger, D. Schroder","doi":"10.1109/IAS.1992.244301","DOIUrl":"https://doi.org/10.1109/IAS.1992.244301","url":null,"abstract":"Two multiresonant zero voltage switching (ZVS) half-bridge converters for high input and output voltages are compared: the multiresonant, series-loaded, half-bridge converter and the series-parallel-loaded, multiresonant, half-bridge converter. Both converters use capacitive output filters, solving the problem of high reverse recovery losses associated with hard turn-off transients of the rectifier diodes. The comparison is based on a state space analysis of the converters. The effects of the parasitic switch capacitances are considered. Optimum design criteria for minimum component stress of both converters are derived. Thus, the ratings of all components are minimized and the efficiency of the converters is enhanced considerable. The advantages of the converters are compared using voltage gain characteristics and stress characteristics. Practical applications of both converters are presented and verified in experimental prototypes.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"3 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":"125543492","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}
P. Theron, P. H. Swanepoel, J. Schoeman, J. V. van Wyk, J. Ferreira
{"title":"Soft switching self-oscillating IGBT-based DC-DC converters","authors":"P. Theron, P. H. Swanepoel, J. Schoeman, J. V. van Wyk, J. Ferreira","doi":"10.1109/IAS.1992.244447","DOIUrl":"https://doi.org/10.1109/IAS.1992.244447","url":null,"abstract":"The characteristics and advantages of soft switching self-oscillating insulated-gate bipolar transistor (IGBT)-based DC-DC converters are described. The main features offered by this family of self-oscillating inverters include: a full-bridge self-oscillating inverter having a minimum component count; extremely high efficiency, even at ultrasonic switching frequencies; low electromagnetic interference due to zero voltage switching; automatic protection against short-circuit output; automatic protection to all other switches during failure of one switch due to overheating; automatic protection against spurious simultaneous turn-on of two switches in the same inverter leg; negligible overrating of the switches for current and voltage; and negligible VA rating of the saturating transformer compared to the power transformer.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"253 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":"126048109","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}
{"title":"An analysis of active power line conditioners using the Electromagnetic Transients Program","authors":"J. Balda, S.C. Low, K. Olejniczak","doi":"10.1109/IAS.1992.244264","DOIUrl":"https://doi.org/10.1109/IAS.1992.244264","url":null,"abstract":"The authors describe how the Electromagnetic Transients Program (EMTP) can be used as a tool to evaluate the effectiveness of active power line conditioners (APLC) in reducing harmonic distortion in distribution systems. The system under study consists of a three-phase diode bridge rectifier served by three single-phase distribution transformers. A shunt APLC and/or shunt passive power filters (PPFs) are used to reduce harmonic distortion. Special attention is given to the shunt APLC rating when it is used with shunt PPFs for harmonic distortion reduction.<<ETX>>","PeriodicalId":110710,"journal":{"name":"Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting","volume":"15 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":"124972003","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}