{"title":"Field orientation control of a doubly excited brushless reluctance machine","authors":"Longya Xu, L. Zhen, Eel-Hwan Kim","doi":"10.1109/IAS.1996.557039","DOIUrl":"https://doi.org/10.1109/IAS.1996.557039","url":null,"abstract":"In this paper, the concept and implementation of field orientation control of a doubly excited brushless reluctance machine (DEBRM) for variable speed drive and generating system are presented. A stator flux orientation scheme is employed to achieve decoupled control of torque and reactive power. A 5-hp DEBRM prototype system, with a DSP based controller and a bi-directional power converter, is built to verify the theoretical analysis. Computer simulation and laboratory experimental results are shown in excellent agreement.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"727 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":"116063711","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 integrated design approach of hybrid compensation systems","authors":"P. Mattavelli, P. Tenti","doi":"10.1109/IAS.1996.563900","DOIUrl":"https://doi.org/10.1109/IAS.1996.563900","url":null,"abstract":"This paper describes an integrated design approach of hybrid compensation systems, including passive filters and thyristor-switched capacitors and inductors. The approach, which is valid even for nonlinear and unbalanced loads fed by unsymmetrical and distorted supply voltages, relies on a load identification method by means of parallel passive impedances. Applying the same method also to passive resonant filters, design criteria of such filters can be enveloped in the comprehensive load compensator design, which takes into account the supply characteristics too. In order to show the potentialities of the method, the case of an AC arc furnace compensator is considered.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"195 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":"122514799","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":"A guidance sensor for continuous mine haulage","authors":"J. Sammarco","doi":"10.1109/IAS.1996.563916","DOIUrl":"https://doi.org/10.1109/IAS.1996.563916","url":null,"abstract":"A major research program to reduce hazard exposure of miners with computer-assisted mining equipment was initiated by the US Bureau of Mines. One application involves the manual process of extracting and hauling coal where operators, in the tight confines of a mine, can be struck or caught by mobile machinery. The approach to remedy this problem uses a guidance system on the haulage equipment so that it follows the machine that extracts coal. This, in essence, involves sensor-based docking of the machines. Sensors that can survive the hostile mine environment of dust, methane gas, and water, play the key role. Computer analysis of the mining machine's movements and empirical machine characterizations were conducted to establish operating requirements and spatial limitations to ensure proper loading of coal into the haulage equipment. These data served in the selection of a sensing system. A near infrared (IR) sensor employing active targets met the requirements. The sensor has a nominal 75/spl deg/ conical field-of-view and a range from 0.1 to 18.0 m. For the single target mode, nominal range accuracy was 4.3% at a distance of 3.56 m. Correction algorithms were generated reducing the error to 0.6%. Airborne dust testing showed less than 0.8% accuracy (worst case) degradation at levels exceeding (by a factor of 7.5) concentrations permitted by Federal law. The sensor can track multiple active targets providing five degrees-of-freedom (DOF) measurements. Using four targets, the nominal range accuracy was 0.4% without correction algorithms. A guidance system for the haulage system to follow the mining machine does not exist commercially. Such a system can reduce fatalities and injuries by current haulage mining equipment, and is a viable alternative to current haulage control.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"67 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":"121904213","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":"A switched reluctance motor drive operating at unity power factor","authors":"L. Caruso, A. Consoli, G. Scarcella, A. Testa","doi":"10.1109/IAS.1996.557057","DOIUrl":"https://doi.org/10.1109/IAS.1996.557057","url":null,"abstract":"The present paper describes a low power (750 W) switched reluctance motor drive for home appliances featuring close to unity power factor and low cost. The key features of the proposed drive are a simple speed control, minimum switch number inverter topology, and a compact high quality rectifier (HQR) input stage based on a quasi-resonant boost topology. The obtained structure is suitable for integration and allows to develop an inexpensive chip implementing all the main functions required by the proposed drive. The paper starts by pointing out recently introduced constraints on line current pollution of home appliances. The proposed drive is then presented emphasizing the design of the high quality rectifier input stage. Experimental results on a prototype are finally presented to evaluate the efficiency of the proposed drive.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"496 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":"122196612","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":"About channel independence for multi channel switched reluctance generating systems","authors":"C. Ferreira, E. Richter","doi":"10.1109/IAS.1996.560178","DOIUrl":"https://doi.org/10.1109/IAS.1996.560178","url":null,"abstract":"A dual channel generating system has exhibited remarkable channel independence from a control point of view. Initially it had been expected that the two channels would have significant control interactions since the magnetic circuits for both channels share most of the magnetic real estate in the switched reluctance machine (SRM). Thus both controllers would be attempting to regulate the same main flux especially in a 12/8 or 4 pole configuration. This expectation has also raised the question whether an 18/12 or 6 pole type SRM, which is presently under development, would show a similar channel interaction. The paper takes a closer look at the machine using simplified magnetic permeance analysis to get a better definition of the amount of channel interaction and to establish any difference in magnetic 4 pole and 6 pole SRM. The analysis is verified against the test results for the magnetics of a four pole SRM which have shown remarkable channel independence under steady state operating conditions.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"12 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":"116869274","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":"Evaluation and implementation of a system to eliminate arbitrary load effects in current-based monitoring of induction machines","authors":"R. R. Schoen, T. Habetler","doi":"10.1109/IAS.1996.557108","DOIUrl":"https://doi.org/10.1109/IAS.1996.557108","url":null,"abstract":"This paper presents a method for removing the load effects from the monitored quantity of the machine. Fault conditions in induction machines cause the magnetic field in the air gap of the machine to be nonuniform. This results in harmonics in the stator current of the motor which can be measured in order to determine the health of the motor. However, variations in the load torque which are not related to the health of the machine typically have exactly the same effect on the load current. Previously presented schemes for current-based condition monitoring ignore the load effect or assume it is known. Therefore, a scheme for determining machine health in the presence of a varying load torque requires some method for separating the two effects. This is accomplished by comparing the actual stator current to a model reference value which includes the load effects. The difference between these two signals provides a filtered quantity, independent of variations of the load, that allows continuous on-line condition monitoring to be conducted without concern for the load condition. Simulation and test results illustrate the effects on the spectrum of the monitored quantity for both constant and eccentric air gaps when in the presence of an oscillating load.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"47 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":"126682659","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}
J. Motto, W. H. Karstaedt, J.M. Sherbondy, S. Leslie
{"title":"Thyristor(diode) on-state voltage, the ABCD modeling parameters revisited including isothermal overload and surge current modeling","authors":"J. Motto, W. H. Karstaedt, J.M. Sherbondy, S. Leslie","doi":"10.1109/IAS.1996.559264","DOIUrl":"https://doi.org/10.1109/IAS.1996.559264","url":null,"abstract":"Circuit modeling is an essential tool in the design of power electronic applications. The widespread use of these models, however, depends upon the availability of parametric data for devices and the proper trade-off of the accuracy and simplicity of the model. This paper addresses these two areas with regard to the forward on-state voltage of thyristors and diodes. As has been described in previous papers, forward on-state forward voltage drop can be modeled by the now classical ABCD parameters. This paper discusses the problems and strengths of the ABCD model and describes how the ABCD parameters can be quickly and efficiently calculated by a 3rd order, multiple, nonlinear regression in a new STARS Visual module. This paper proposes an alternate mathematical model to the ABCD model, labeled the MNOP model, and describes the advantages of this model. This paper also describes one of the main limitations of the ABCD model, which is the fact that it is typically used to describe the maximum forward voltage drop on the data sheet, which is NOT an isothermal curve. This, in turn, does not permit the change in the on-state forward voltage drop as a function of junction temperature to be modeled. Isothermal models of diodes and thyristors will be discussed and a new simplified model proposed for surge and overload conditions.","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":"124218388","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":"A combined artificial neural network and DSP approach to the implementation of space vector modulation techniques","authors":"A. Bakhshai, J. Espinoza, G. Joós, H. Jin","doi":"10.1109/IAS.1996.560195","DOIUrl":"https://doi.org/10.1109/IAS.1996.560195","url":null,"abstract":"Space vector modulation (SVM) in three-phase voltage source and current source converters has become the preferred PWM method for digital implementations. This paper presents an alternative SVM implementation that is based on a neural network structure. The technique reduces hardware and software complexity, and computation time, and increases the accuracy of the positioning of the switching instants. The technique exhibits the following features: (a) possibility of higher switching frequencies, (b) higher bandwidth of the control loops, (c) reduced hardware and software, and (d) reduction of parasitic harmonics in all PWM waveforms. The proposed method is compared to conventional implementations of SVM techniques in terms of hardware/software requirements, switching frequencies, harmonic spectra, and computation times. The method is applied to a 2 kVA unit and experimental results confirm theoretical and simulation results.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"101 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":"123646046","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 the versatile electronic ballast for metal halide lamps with phase-shift soft-switching control","authors":"C.L. Tsay, H. Chun, L. Wu, K. Kwan","doi":"10.1109/IAS.1996.563867","DOIUrl":"https://doi.org/10.1109/IAS.1996.563867","url":null,"abstract":"High-intensity-discharge (HID) lamps have received great attention in residential as well as commercial lighting applications. This paper presents an electronic ballast design with high-frequency soft-switching suitable for various types and wattages of metal halide lamps. By use of the phase-shift charge-mode control technology, the output lumen can be steadily adjusted, which can therefore be used as a dimming control. Moreover, overvoltage and overcurrent protection are included in the circuit which guarantees a safe operation of the circuit.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"99 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":"123667294","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}
D. Piccone, R. D. De Doncker, J. Barrow, W. H. Tobin
{"title":"The MTO thyristor-a new high power bipolar MOS thyristor","authors":"D. Piccone, R. D. De Doncker, J. Barrow, W. H. Tobin","doi":"10.1109/IAS.1996.559262","DOIUrl":"https://doi.org/10.1109/IAS.1996.559262","url":null,"abstract":"A new high power bipolar MOS thyristor, the MTO/sup TM/ thyristor, is a latching device which extends the limited capabilities of the MCT and IGBT to higher power and blocking voltage. The MTO thyristor plan fits well, beginning at a blocking voltage level where the other bipolar MOS devices are believed to have a ceiling of diminishing returns, that is above 3000 V. The MTO thyristor is easily accommodated to the conventional disk-type package for double sided cooling and permits design voltage opportunity to that achieved for thyristors, e.g., 9000 V. Feasibility of concept has been established and development for specific designs is well underway.","PeriodicalId":177291,"journal":{"name":"IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting","volume":"79 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":"124492239","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}