S.M. Islam, C. B. Somuah, M. Ahmed, Y. Abdel-Magid
Speed regulation of a voltage decoupled induction motor which provides optimal efficiency and quick response is discussed. A robust first-order model reference adaptive control (MRAC)-based speed controller whose stability has been proved via Lyapunov's second method is proposed. Computer simulation results for a 100-hp squirrel-cage motor show that the proposed MRAC controller has remarkably good tracking and regulation characteristics.<>
{"title":"MRAC based speed regulation of an excitation controlled quick response induction motor","authors":"S.M. Islam, C. B. Somuah, M. Ahmed, Y. Abdel-Magid","doi":"10.1109/IAS.1990.152168","DOIUrl":"https://doi.org/10.1109/IAS.1990.152168","url":null,"abstract":"Speed regulation of a voltage decoupled induction motor which provides optimal efficiency and quick response is discussed. A robust first-order model reference adaptive control (MRAC)-based speed controller whose stability has been proved via Lyapunov's second method is proposed. Computer simulation results for a 100-hp squirrel-cage motor show that the proposed MRAC controller has remarkably good tracking and regulation characteristics.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115393710","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}
The modeling services and specific physical and mathematical models of the glass melting process that have been developed by the glass industry and related organizations are reviewed. Specific models and modeling capabilities of organizations in the US are described in terms of methods employed, model uses, availability and costs. The extent of modeling use, reasons for using or not using modeling, and perceived benefits and misgivings are also examined. Areas for potential improvement and further development of glass furnace modeling tools are identified.<>
{"title":"Modeling of the glass melting process","authors":"S. Venkateswaran, J.L. Conrad, G.A. Walzer","doi":"10.1109/IAS.1990.152360","DOIUrl":"https://doi.org/10.1109/IAS.1990.152360","url":null,"abstract":"The modeling services and specific physical and mathematical models of the glass melting process that have been developed by the glass industry and related organizations are reviewed. Specific models and modeling capabilities of organizations in the US are described in terms of methods employed, model uses, availability and costs. The extent of modeling use, reasons for using or not using modeling, and perceived benefits and misgivings are also examined. Areas for potential improvement and further development of glass furnace modeling tools are identified.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123218843","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}
A new design method for the optimum speed regulator system for a permanent-magnet-type brushless motor is proposed. The driving method developed through examining the armature reaction consists of vector control, field weakening, and field strengthening, control. Since the PM motor has the property of nonlinearity, it is necessary to linearize the motor system at the arbitrary equilibrium point when the optimal feedback gains of the state feedback control are determined in the usual system design method. Therefore, a quick transient response can be obtained only near the equilibrium point. By introducing the dynamic compensation signal in order to linearize the controlled object, the decoupled subsystem can be constructed. Hence, the d-axis current and the q-axis current can be controlled independently. In order to obtain the quick speed response, a microprocessor-based controller including a digital signal processor (DSP) is used in the implementation of this control system.<>
{"title":"The advanced speed regulator system for brushless motor","authors":"Y. Itoh, Y. Naitoh, T. Tsuchiya","doi":"10.1109/IAS.1990.152226","DOIUrl":"https://doi.org/10.1109/IAS.1990.152226","url":null,"abstract":"A new design method for the optimum speed regulator system for a permanent-magnet-type brushless motor is proposed. The driving method developed through examining the armature reaction consists of vector control, field weakening, and field strengthening, control. Since the PM motor has the property of nonlinearity, it is necessary to linearize the motor system at the arbitrary equilibrium point when the optimal feedback gains of the state feedback control are determined in the usual system design method. Therefore, a quick transient response can be obtained only near the equilibrium point. By introducing the dynamic compensation signal in order to linearize the controlled object, the decoupled subsystem can be constructed. Hence, the d-axis current and the q-axis current can be controlled independently. In order to obtain the quick speed response, a microprocessor-based controller including a digital signal processor (DSP) is used in the implementation of this control system.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122175518","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}
Harmonic distortion and its effects on current waveforms are reviewed. The problems produced by higher order harmonics, hysteresis losses in the transformers' cores, and the currents' high crest factors are discussed. Several solutions to the effects of harmonic distortion on overcurrent devices such as circuit breakers, fuses, and relays are presented, including derating the transformers, and motors to avoid overheating and sizing the overcurrent devices by measuring load currents using only true RMS sensing meters.<>
{"title":"The effects of harmonics on overcurrent protection devices","authors":"J. Brożek","doi":"10.1109/IAS.1990.152455","DOIUrl":"https://doi.org/10.1109/IAS.1990.152455","url":null,"abstract":"Harmonic distortion and its effects on current waveforms are reviewed. The problems produced by higher order harmonics, hysteresis losses in the transformers' cores, and the currents' high crest factors are discussed. Several solutions to the effects of harmonic distortion on overcurrent devices such as circuit breakers, fuses, and relays are presented, including derating the transformers, and motors to avoid overheating and sizing the overcurrent devices by measuring load currents using only true RMS sensing meters.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125436454","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}
A power factor analysis and a harmonic analysis of a modern glass fiber manufacturing plant are presented. Problems caused by low power factor and poor voltage regulation include utility billing penalties, low voltages, poor motor performance, reduced system capacity, and increased system losses. Possible solutions involve installing capacitors, relocating present capacitors, and using proper taps on the transformers. The measurement of harmonics and the effects of adding power factor correction capacitors are discussed. Possible solutions to the problem, such as the design of harmonic filters, are also discussed.<>
{"title":"Power factor and harmonic analysis of a modern glass fiber manufacturing plant","authors":"S. Mendis, C. Gilker, C. Casarez","doi":"10.1109/IAS.1990.152454","DOIUrl":"https://doi.org/10.1109/IAS.1990.152454","url":null,"abstract":"A power factor analysis and a harmonic analysis of a modern glass fiber manufacturing plant are presented. Problems caused by low power factor and poor voltage regulation include utility billing penalties, low voltages, poor motor performance, reduced system capacity, and increased system losses. Possible solutions involve installing capacitors, relocating present capacitors, and using proper taps on the transformers. The measurement of harmonics and the effects of adding power factor correction capacitors are discussed. Possible solutions to the problem, such as the design of harmonic filters, are also discussed.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130029012","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}
Computer-aided analysis and design of both load- and forced-commutation circuits and di/dt and dv/dt protection circuits for thyristors are presented. The thyristor model used features five programmable parameters, including di/dt and dv/dt ratings. The simulation and theoretically predicted results are compared.<>
{"title":"Computer-aided analysis and design of commutating, di/dt, and dv/dt circuits for thyristors","authors":"N. A. Losic","doi":"10.1109/IAS.1990.152336","DOIUrl":"https://doi.org/10.1109/IAS.1990.152336","url":null,"abstract":"Computer-aided analysis and design of both load- and forced-commutation circuits and di/dt and dv/dt protection circuits for thyristors are presented. The thyristor model used features five programmable parameters, including di/dt and dv/dt ratings. The simulation and theoretically predicted results are compared.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130142065","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}
Two methods that use advanced control technology in order to improve the performance of AC servomotor systems are described. The first method is the detection of instantaneous speed using an observer. This method provides good response in speed control because it is possible to detect exactly the speed without detection dead time over a wide range of speeds. The second method is the identification of the mechanical inertia time corresponding to motor and load based on the model reference adaptive control; system (MRACS). This method enables instantaneous speed detection to be applied to systems in which the mechanical inertia time is unknown. Moreover, it can realize the automatic adjustment of a speed controller using the result of identification. The effectiveness of these methods has been confirmed by experimentation. The experimental system is composed of a digital controller with a digital signal processor (DSP), a pulse-width-modulation (PWM) inverter, and a permanent magnetic motor.<>
{"title":"Instantaneous speed detection with parameter identification for AC servo systems","authors":"K. Fujita, K. Sado","doi":"10.1109/IAS.1990.152252","DOIUrl":"https://doi.org/10.1109/IAS.1990.152252","url":null,"abstract":"Two methods that use advanced control technology in order to improve the performance of AC servomotor systems are described. The first method is the detection of instantaneous speed using an observer. This method provides good response in speed control because it is possible to detect exactly the speed without detection dead time over a wide range of speeds. The second method is the identification of the mechanical inertia time corresponding to motor and load based on the model reference adaptive control; system (MRACS). This method enables instantaneous speed detection to be applied to systems in which the mechanical inertia time is unknown. Moreover, it can realize the automatic adjustment of a speed controller using the result of identification. The effectiveness of these methods has been confirmed by experimentation. The experimental system is composed of a digital controller with a digital signal processor (DSP), a pulse-width-modulation (PWM) inverter, and a permanent magnetic motor.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129926195","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}
Periodically switching power converters can be described by an averaged equation and ripple correction functions. An algorithm for the analytical computation of the averaged system and the ripple correction functions, the Krylov-Bogoliubov-Miltropolsky algorithm is implemented using a symbolic computer program. A ripple correction series, which estimates the actual waveforms given the averaged waveforms, is derived. Correction terms for the averaged model are also derived. The approximations require numerical calculations of averaged models which are normally not stiff. The correction terms are continuous functions which can be computed symbolically. The approximate system can be integrated on time scales slower than those used for conventional time-domain techniques. A resonant inverter and a boost converter are presented as examples.<>
{"title":"A new approach to fast simulation of periodically switching power converters","authors":"P. Krein, R. Bass","doi":"10.1109/IAS.1990.152334","DOIUrl":"https://doi.org/10.1109/IAS.1990.152334","url":null,"abstract":"Periodically switching power converters can be described by an averaged equation and ripple correction functions. An algorithm for the analytical computation of the averaged system and the ripple correction functions, the Krylov-Bogoliubov-Miltropolsky algorithm is implemented using a symbolic computer program. A ripple correction series, which estimates the actual waveforms given the averaged waveforms, is derived. Correction terms for the averaged model are also derived. The approximations require numerical calculations of averaged models which are normally not stiff. The correction terms are continuous functions which can be computed symbolically. The approximate system can be integrated on time scales slower than those used for conventional time-domain techniques. A resonant inverter and a boost converter are presented as examples.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"515 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116208918","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}
The most common method of graphing a two-dimensional electric or magnetic field is by drawing the lines of force. Such vector diagrams may become confusing if the field has nonzero divergence, many fine details, or discontinuities. The alternative presented in this work is to indicate the direction of the vector field at a point by a color, and its intensity by brightness. The advantages of this are that field intensities are readily apparent and can be compared easily, discontinuities present no special problems, and the algorithm can be implemented much more easily than the traditional approach of drawing force lines. An ordinary PS/2 model 80 with coprocessor is found to be a suitable hardware platform for this method. This method is immediately applicable to any two-dimensional vector field over a bounded rectangular region.<>
{"title":"An algorithm for the visual representation of a two-dimensional vector field","authors":"D. Kučerovský","doi":"10.1109/IAS.1990.152292","DOIUrl":"https://doi.org/10.1109/IAS.1990.152292","url":null,"abstract":"The most common method of graphing a two-dimensional electric or magnetic field is by drawing the lines of force. Such vector diagrams may become confusing if the field has nonzero divergence, many fine details, or discontinuities. The alternative presented in this work is to indicate the direction of the vector field at a point by a color, and its intensity by brightness. The advantages of this are that field intensities are readily apparent and can be compared easily, discontinuities present no special problems, and the algorithm can be implemented much more easily than the traditional approach of drawing force lines. An ordinary PS/2 model 80 with coprocessor is found to be a suitable hardware platform for this method. This method is immediately applicable to any two-dimensional vector field over a bounded rectangular region.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126805769","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}
G. A. Franz, J. Walden, R. S. Scott, W. Bicknell, R. Steigerwald
AC and DC power MOSFET models for the design of resonant power converters are described. The influence of device parameters on the circuit performance is investigated in detail. A 1 MHz resonant converter circuit is simulated, and circuit waveforms are shown to agree with breadboard measurements with a high level of accuracy. Thus, design optimization can be performed through simulations without the need of breadboard iterations.<>
{"title":"Use of accurate MOS models for optimizing resonant converter designs","authors":"G. A. Franz, J. Walden, R. S. Scott, W. Bicknell, R. Steigerwald","doi":"10.1109/IAS.1990.152394","DOIUrl":"https://doi.org/10.1109/IAS.1990.152394","url":null,"abstract":"AC and DC power MOSFET models for the design of resonant power converters are described. The influence of device parameters on the circuit performance is investigated in detail. A 1 MHz resonant converter circuit is simulated, and circuit waveforms are shown to agree with breadboard measurements with a high level of accuracy. Thus, design optimization can be performed through simulations without the need of breadboard iterations.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127609330","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：