{"title":"On the switching performance of semiconductor devices in a cascode switch","authors":"T. Chan, M. Morcos","doi":"10.1109/IAS.1996.559269","DOIUrl":"https://doi.org/10.1109/IAS.1996.559269","url":null,"abstract":"The gate turn-off (GTO) thyristor has the highest voltage and current rating among the semiconductor power switches used extensively today. The insulated-gate bipolar transistor (IGBT) is used to improve switching performance of a GTO in a cascode switch. This paper documents the switching performance of the different power semiconductor devices used in an IGBT-gated GTO-cascode switch. The cascode switch was tested and simulated using SPICE. Experimental waveforms are presented and show good agreement with simulation results.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115120316","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":"Survey of harmonics measurements in electrical distribution systems","authors":"L. Tolbert, H. D. Hollis, P. S. Hale","doi":"10.1109/IAS.1996.563898","DOIUrl":"https://doi.org/10.1109/IAS.1996.563898","url":null,"abstract":"An assessment of the harmonics found in the electrical distribution system of several buildings in the three Department of Energy (DOE) Oak Ridge plants in Tennessee has yielded several conclusions useful in the design of electrical distribution systems. A preliminary survey to determine where significant amounts of harmonic currents or voltages existed in the distribution system was performed at several buildings by comparing readings taken with true root-mean-square (RMS) multimeters and averaging multimeters (nontrue RMS meters). From these measurements and subsequent calculations, facilities that appeared to have significant levels of harmonics present were analyzed with a power analyzer that could record waveforms and give the spectrum and magnitude of harmonics. Among the nonlinear loads for which sample waveforms are illustrated are fluorescent lighting (both magnetic and electronic ballasts), variable frequency drives, switch mode power supplies, and uninterruptible power supplies. A discussion as to how various harmonic waveforms come about as a result of these nonlinear loads is also outlined in this paper.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"380 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115477603","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":"Development of a dynamic model of electric arc for power electronics simulations","authors":"K. Tseng, Y. Wang, D. Vilathgamuwa","doi":"10.1109/IAS.1996.563876","DOIUrl":"https://doi.org/10.1109/IAS.1996.563876","url":null,"abstract":"This paper presents a physics-based electric arc model which can realistically simulate both static and dynamic characteristics of an arc load controlled by a power electronic circuit. The proposed model was developed from modifications of the classical Cassie and Mayr equations. The model equations have been expressed in a form suitable for incorporation into circuit simulators employing the nodal analysis method of equation solving. The model has been test implemented in the Saber circuit simulator. There has been a considerable degree of correspondence between the simulated and experimental results.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115608616","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":"Changing role of SCADA in manufacturing plant","authors":"S.K. Ghosh","doi":"10.1109/IAS.1996.559275","DOIUrl":"https://doi.org/10.1109/IAS.1996.559275","url":null,"abstract":"Supervisory control and data acquisition (SCADA) was meant primarily for remote monitoring and/or control function of a number of widely distributed sites. However, the expectations from a SCADA system in manufacturing industry is not as well-defined as that in the power/utility industry. SCADA in a manufacturing environment is caught between control system and management functions. The intelligent human-machine interface (HMI) is often visualized as SCADA central station due to task overlaps. Physical difficulties and vision problems in implementation of a successful SCADA in manufacturing environment is discussed. The importance of having a SCADA central computer is stressed. The efforts like 'Cooperative Automation' where users, suppliers and integrators would work as partners to develop the anticipated solution are already under way.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121052488","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":"Analytical simulation of current effect on radiation energy emitted from high current wall-stabilized arcs","authors":"T. Inaba, S. Kusunoki, Y. Endo","doi":"10.1109/IAS.1996.563875","DOIUrl":"https://doi.org/10.1109/IAS.1996.563875","url":null,"abstract":"In order to know the effect of the arc current on the radiation power, an analytical simulation of the radiation or the lighting energy emitted from stabilized arcs has been made using an analytical relation between voltage gradient E and arc current I. Under the condition that the continuous spectrums are stronger than line ones, the radiation power is proportional to the square of electron density. When E-I curves are denoted as E=f(I)/spl prop/I/sup m/, the radiation power /spl Phi/ can be expressed as /spl Phi//spl prop/I/sup 2(1-m)/, where 2(1-m) is 2.7 for I<10 A, 2 for I=10/spl sim/100 A and 1.2 for I>1000 A. These simulated exponents fairly agreed with the experimental ones in Ar and SF/sub 6/ high current stabilized arcs at 1 atm.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124937373","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":"Optimized space vector modulation and regular-sampled PWM: a reexamination","authors":"Jian Sun, H. Grotstollen","doi":"10.1109/IAS.1996.560198","DOIUrl":"https://doi.org/10.1109/IAS.1996.560198","url":null,"abstract":"The relationship between space vector modulation and regular-sampled PWM techniques for hard-switching PWM inverters and rectifiers are reexamined in this paper. Space vector modulation with optimized apportioning of null vector time that results in minimum current THD is investigated and is compared with previously known methods. The conventional optimal regular-sampled PWM method and its relation to the optimized space vector modulation are discussed. Optimal discontinuous modulation for minimizing both the switching losses and the current THD is also studied.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126171011","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":"Harmonic reduction techniques for single-switch three-phase boost rectifiers","authors":"J. Sun, N. Frohleke, H. Grotstollen","doi":"10.1109/IAS.1996.560234","DOIUrl":"https://doi.org/10.1109/IAS.1996.560234","url":null,"abstract":"Techniques for reducing harmonic distortion in single-switch three-phase boost rectifiers are presented. Optimal pulse-width modulation methods for the main switch to minimize input harmonic current distortion or to maximize the converter power range are described first. Effects of the voltage control loop on the input current waveform are then investigated by using the harmonic balance method. It is found that through proper design of the voltage controller, the input current harmonics in the closed-loop controlled system can be reduced to almost the same level as when the optimized PWM is applied. Simulation and experimental results are included to validate the analysis.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125264130","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}
T. Umeno, K. Asano, H. Ohashi, H. Kawai, T. Naito, T. Taguchi
{"title":"Pneumatic monitor for a vehicle based on the disturbance observer","authors":"T. Umeno, K. Asano, H. Ohashi, H. Kawai, T. Naito, T. Taguchi","doi":"10.1109/IAS.1996.559296","DOIUrl":"https://doi.org/10.1109/IAS.1996.559296","url":null,"abstract":"In this paper, a new method for detecting underinflated tires of a vehicle and a pneumatic monitor based on this method are proposed. Most of the monitors available are of the air pressure switch type and of the loaded radius type. However, the former is higher in manufacturing cost, and the latter has difficulty in detecting natural leaks causing all tires to be underinflated. In the new method, the variation of the tire stiffness which depends on the pressure is estimated by using a disturbance observer. This method is realized in lower cost because it needs only wheel speed sensors already provided for anti-lock brake system (ABS), and also can detect underinflated tires in every situation such as a puncture and natural leaks. The monitor is installed on a vehicle and its performance is confirmed by experiments.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125565631","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":"Low-cost compact PM machine for adjustable-speed pump application","authors":"F. Caricchi, F. Crescimbini, O. Honorati","doi":"10.1109/IAS.1996.557067","DOIUrl":"https://doi.org/10.1109/IAS.1996.557067","url":null,"abstract":"A variable-speed driven pump can result in significant energy conservation where reduced flow rates are required for long periods of time. Concerning adjustable-speed pump drives, one major contribution of this paper is to show that a permanent magnet motor based on the slotless axial-flux PM machine (AFPM) topology can be a suitable candidate to advantageously compete with the induction motor for such a low-cost drive application. To the purpose of a cost comparison, the paper discusses the design and construction of a prototype machine which has been conceived to replace a 1.2 hp induction motor being used in a standard adjustable-speed pump drive. Results taken from laboratory tests of the prototype machine are reported together with an assessment of the machine manufacturing cost.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115025916","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":"Design and test of a variable topology converter for electric motor drive applications","authors":"D. Essah, Ryan M. O'Connell, R. S. Wallace","doi":"10.1109/IAS.1996.556997","DOIUrl":"https://doi.org/10.1109/IAS.1996.556997","url":null,"abstract":"The design considerations for a high power variable topology converter, which has been built and tested as part of an electric drive test bed project are presented. The main features of the power converter is its ready re-configurability to drive a wide variety of electric machines with minimum hardware changes. The switch topology, power electronic device selection, gate drive design, and details of the switch control and protection circuit are explained. An experimental setup used to evaluate the new topology is also described.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115337244","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}