Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.801747
M. Milanovič, B. Sedmak, F. Mihalič, A. Hren
This paper considers the connection between switching matrix function and pulse width modulation algorithm with emphasis on the unity power factor correction requirements for three-phase three-level AC to DC converter. Based on the switching matrix converter theory, the switching sequences for PWM of the three-phase three-level AC to DC converter (rectifier) have been developed. Such an approach enables the input displacement factor correction without an input current sensor. The necessary control variable is only the measured displacement angle between the input voltage and the input current.
{"title":"PWM algorithm for three-phase three-level AC to DC boost rectifier","authors":"M. Milanovič, B. Sedmak, F. Mihalič, A. Hren","doi":"10.1109/ISIE.1999.801747","DOIUrl":"https://doi.org/10.1109/ISIE.1999.801747","url":null,"abstract":"This paper considers the connection between switching matrix function and pulse width modulation algorithm with emphasis on the unity power factor correction requirements for three-phase three-level AC to DC converter. Based on the switching matrix converter theory, the switching sequences for PWM of the three-phase three-level AC to DC converter (rectifier) have been developed. Such an approach enables the input displacement factor correction without an input current sensor. The necessary control variable is only the measured displacement angle between the input voltage and the input current.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128133723","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}
Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.798667
D. Neacşu
A review of the vectorial control methods for three-phase AC/DC boost converters is first presented. All blocks of the control scheme such as PWM, PI controllers are optimized. The problems associated with fast current dynamics at a step-down current reference due to the limited voltage available are explained both with solutions based on regular PI or novel synchronous reference frame hysteresis control.
{"title":"Vectorial current control techniques for three-phase AC/DC boost converters","authors":"D. Neacşu","doi":"10.1109/ISIE.1999.798667","DOIUrl":"https://doi.org/10.1109/ISIE.1999.798667","url":null,"abstract":"A review of the vectorial control methods for three-phase AC/DC boost converters is first presented. All blocks of the control scheme such as PWM, PI controllers are optimized. The problems associated with fast current dynamics at a step-down current reference due to the limited voltage available are explained both with solutions based on regular PI or novel synchronous reference frame hysteresis control.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132593321","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}
Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.798730
Doo-Jin shin, Uk-Youl Hah, Je-Hie Lee
In this paper, the authors propose a servo control system with an observer which can predict one step ahead states as well as disturbances. And also, they utilized two inertia modeling in order to deal with coupled system accurately. The overall control system consists of two parts-a servo controller and an observer. The state observer is designed with the Kalman filter algorithm to estimate the unknown states optimally. It is well known that the Kalman filter is an effective way to estimate the state of a dynamic system with a random noisy environment. A measurement error may occur due to a low resolution encoder in observer design. There are a number of disturbances in servo control systems due the observer which can estimate the disturbances using an inverse matrix of system dynamic equations to unexpected loads, parameter changes and other reasons. Simulation results are carried out to show that the proposed algorithm is able to estimate the speed and position stable and accurately. Also, the performance of the proposed algorithm is shown to be better than the average speed algorithm by some simulation results.
{"title":"An observer design for 2 inertia servo control system","authors":"Doo-Jin shin, Uk-Youl Hah, Je-Hie Lee","doi":"10.1109/ISIE.1999.798730","DOIUrl":"https://doi.org/10.1109/ISIE.1999.798730","url":null,"abstract":"In this paper, the authors propose a servo control system with an observer which can predict one step ahead states as well as disturbances. And also, they utilized two inertia modeling in order to deal with coupled system accurately. The overall control system consists of two parts-a servo controller and an observer. The state observer is designed with the Kalman filter algorithm to estimate the unknown states optimally. It is well known that the Kalman filter is an effective way to estimate the state of a dynamic system with a random noisy environment. A measurement error may occur due to a low resolution encoder in observer design. There are a number of disturbances in servo control systems due the observer which can estimate the disturbances using an inverse matrix of system dynamic equations to unexpected loads, parameter changes and other reasons. Simulation results are carried out to show that the proposed algorithm is able to estimate the speed and position stable and accurately. Also, the performance of the proposed algorithm is shown to be better than the average speed algorithm by some simulation results.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133311459","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}
Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.798719
L. Ben‐Brahim
This paper describes the application of the vector control technique to a three level or NPC (neutral point clamped) inverter using a DSP (digital signal processor) TMS320C25. A newly developed PWM technique for this kind of inverter is applied. As a result the switching losses as well as the current distortions are reduced. A smaller fluctuation of the neutral point voltage was also obtained. The proposed method was applied to a 20 kW motor using an NPC converter and inverter. Theoretical and practical aspects as well as the experimental results are presented in this report.
{"title":"Improvement of a PWM controlled NPC GTO inverter for AC motor drives","authors":"L. Ben‐Brahim","doi":"10.1109/ISIE.1999.798719","DOIUrl":"https://doi.org/10.1109/ISIE.1999.798719","url":null,"abstract":"This paper describes the application of the vector control technique to a three level or NPC (neutral point clamped) inverter using a DSP (digital signal processor) TMS320C25. A newly developed PWM technique for this kind of inverter is applied. As a result the switching losses as well as the current distortions are reduced. A smaller fluctuation of the neutral point voltage was also obtained. The proposed method was applied to a 20 kW motor using an NPC converter and inverter. Theoretical and practical aspects as well as the experimental results are presented in this report.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"247 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133486279","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}
Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.796788
Y. Suh, M. Lee
Stability of state delay systems is discussed by investigating properties of a Lyapunov functional. Firstly finite characterization of a Lyapunov functional equation for state delay systems is proposed. The finite characterization can be computed using a matrix exponential function, while conventional computation has been relied on numerical approximations. Secondly based on the finite characterization, a stability condition for state delay systems with unknown but bounded constant delay is proposed.
{"title":"Stability of state delay systems based on a Lyapunov functional","authors":"Y. Suh, M. Lee","doi":"10.1109/ISIE.1999.796788","DOIUrl":"https://doi.org/10.1109/ISIE.1999.796788","url":null,"abstract":"Stability of state delay systems is discussed by investigating properties of a Lyapunov functional. Firstly finite characterization of a Lyapunov functional equation for state delay systems is proposed. The finite characterization can be computed using a matrix exponential function, while conventional computation has been relied on numerical approximations. Secondly based on the finite characterization, a stability condition for state delay systems with unknown but bounded constant delay is proposed.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133015452","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}
Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.796857
Ming-Sheng Yang, Pin-Lin Liu, Hung-Ching Lu
This paper presents a design method of output feedback sliding mode control for stabilizing the uncertain systems with multiple state delays, when the system states are not available. The control scheme consists of two portions including the design of an approximating continuous control law and the determination of a special switching hyperplane. A special switching hyperplane is determined by employing the Bellman-Gronwall theorem, so that the system outputs are initially on the sliding hyperplane and sliding motion has a desired stable response. Furthermore, by means of the Lyapunov stability theorem, the authors derive an approximating continuous control law, which can not only guarantee the existence of the sliding mode but also avoid the chattering phenomenon. Then, the design procedure does not include solving the Lyapunov equation or Riccati equation. Finally, simulation results show the effectiveness of the proposed method.
{"title":"Output feedback stabilization of uncertain dynamic systems with multiple state delays via sliding mode control strategy","authors":"Ming-Sheng Yang, Pin-Lin Liu, Hung-Ching Lu","doi":"10.1109/ISIE.1999.796857","DOIUrl":"https://doi.org/10.1109/ISIE.1999.796857","url":null,"abstract":"This paper presents a design method of output feedback sliding mode control for stabilizing the uncertain systems with multiple state delays, when the system states are not available. The control scheme consists of two portions including the design of an approximating continuous control law and the determination of a special switching hyperplane. A special switching hyperplane is determined by employing the Bellman-Gronwall theorem, so that the system outputs are initially on the sliding hyperplane and sliding motion has a desired stable response. Furthermore, by means of the Lyapunov stability theorem, the authors derive an approximating continuous control law, which can not only guarantee the existence of the sliding mode but also avoid the chattering phenomenon. Then, the design procedure does not include solving the Lyapunov equation or Riccati equation. Finally, simulation results show the effectiveness of the proposed method.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115628626","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}
Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.796885
J. M. Moreno-Eguilaz, J. Peracaula
A didactic explanation of AC power using the generalized instantaneous power theory is presented in this paper. After a review of this theory, its relationship with the classical AC power definitions is described. In order to understand the presented concepts, two different computer simulations are shown. First, a three-phase balanced circuit is analyzed which contains no harmonics. Second, a three-phase power rectifier is studied with this theory. Fundamental and harmonic power concepts are commented upon in detail. The obtained results are used to understand AC power in electronic equipment for instrumentation and diagnosis purposes of three-phase systems. The final objective of this work is focused on the monitoring and efficiency optimization of three-phase electric drives.
{"title":"Understanding AC power using the generalized instantaneous reactive power theory: considerations for instrumentation of three-phase electronic converters","authors":"J. M. Moreno-Eguilaz, J. Peracaula","doi":"10.1109/ISIE.1999.796885","DOIUrl":"https://doi.org/10.1109/ISIE.1999.796885","url":null,"abstract":"A didactic explanation of AC power using the generalized instantaneous power theory is presented in this paper. After a review of this theory, its relationship with the classical AC power definitions is described. In order to understand the presented concepts, two different computer simulations are shown. First, a three-phase balanced circuit is analyzed which contains no harmonics. Second, a three-phase power rectifier is studied with this theory. Fundamental and harmonic power concepts are commented upon in detail. The obtained results are used to understand AC power in electronic equipment for instrumentation and diagnosis purposes of three-phase systems. The final objective of this work is focused on the monitoring and efficiency optimization of three-phase electric drives.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117054791","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}
Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.798715
B. Lin, Hsin-Hung Lu
An AC/DC/AC power converter with three-level pulse width modulation is proposed in this paper. A single-phase power factor correction circuit to improve the power quality in the rectifier and a three-level PWM inverter to reduce the harmonic contents of the inverter output voltages are presented. In the rectifier side, the hysteresis current control (HCC) technique for a bridge diode with two power switches is adopted. A control scheme is presented that the line current is driven to follow the reference sinusoidal current which is derived from the DC link voltage regulator, DC capacitor voltage balance compensator and the output power estimator. A three-level PWM technique for a three-phase voltage source inverter is used to reduce the voltage harmonics. The major advantage for using such strategy is that the blocking voltage of each power device is clamping to half of the DC link voltage. The high power factor at the input of the rectifier and the low total harmonic distortion at the output of the inverter are verified by software simulations.
{"title":"A novel multilevel PWM control scheme of the AC/DC/AC converter for AC drives","authors":"B. Lin, Hsin-Hung Lu","doi":"10.1109/ISIE.1999.798715","DOIUrl":"https://doi.org/10.1109/ISIE.1999.798715","url":null,"abstract":"An AC/DC/AC power converter with three-level pulse width modulation is proposed in this paper. A single-phase power factor correction circuit to improve the power quality in the rectifier and a three-level PWM inverter to reduce the harmonic contents of the inverter output voltages are presented. In the rectifier side, the hysteresis current control (HCC) technique for a bridge diode with two power switches is adopted. A control scheme is presented that the line current is driven to follow the reference sinusoidal current which is derived from the DC link voltage regulator, DC capacitor voltage balance compensator and the output power estimator. A three-level PWM technique for a three-phase voltage source inverter is used to reduce the voltage harmonics. The major advantage for using such strategy is that the blocking voltage of each power device is clamping to half of the DC link voltage. The high power factor at the input of the rectifier and the low total harmonic distortion at the output of the inverter are verified by software simulations.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115156592","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}
Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.801825
D. Kukolj, F. Kulić, E. Levi
The paper analyses applicability of different artificial intelligence based gain scheduling techniques for a conventional PI controller. Three different methods are elaborated. These are the artificial neural network based gain scheduling, gain scheduling by means of an adaptive neuro-fuzzy inference system, and gain scheduling using a self-constructing Takagi-Sugeno fuzzy rule-based system. All the three methods are applied to gain scheduling of a PI speed controller in a DC motor drive. A comparative analysis of the drive performance with PI speed controller without gain scheduling and with PI speed controller with gain scheduling, using the three described gain schedulers, is performed. Good quality of performance is achieved over a wide range of operating conditions with all the three methods of gain scheduling.
{"title":"Artificial intelligence based gain scheduling of PI speed controller in DC motor drives","authors":"D. Kukolj, F. Kulić, E. Levi","doi":"10.1109/ISIE.1999.801825","DOIUrl":"https://doi.org/10.1109/ISIE.1999.801825","url":null,"abstract":"The paper analyses applicability of different artificial intelligence based gain scheduling techniques for a conventional PI controller. Three different methods are elaborated. These are the artificial neural network based gain scheduling, gain scheduling by means of an adaptive neuro-fuzzy inference system, and gain scheduling using a self-constructing Takagi-Sugeno fuzzy rule-based system. All the three methods are applied to gain scheduling of a PI speed controller in a DC motor drive. A comparative analysis of the drive performance with PI speed controller without gain scheduling and with PI speed controller with gain scheduling, using the three described gain schedulers, is performed. Good quality of performance is achieved over a wide range of operating conditions with all the three methods of gain scheduling.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130251933","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}
Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.798741
T. Sano, H. Yamamoto
A yukata is the same shape regardless of the wearer's height or weight. An arrangement of its texture pattern becomes an important factor for designing the yukata. It is desirable to draw the cutting pattern so that the yukata is set up for the wearer. Because drawing the cutting pattern requires great skill, it causes difficulties for beginners. In this paper, the authors propose a CAD system that support designers for drawing cutting patterns: (1) by using this CAD system, beginners can draw cutting patterns of yukatas which are in harmony with the wearer's personality; (2) by the texture analysis of the striped pattern and the stencil pattern, the cutting pattern is drawn semi-automatically.
{"title":"CAD system for Japanese kimono","authors":"T. Sano, H. Yamamoto","doi":"10.1109/ISIE.1999.798741","DOIUrl":"https://doi.org/10.1109/ISIE.1999.798741","url":null,"abstract":"A yukata is the same shape regardless of the wearer's height or weight. An arrangement of its texture pattern becomes an important factor for designing the yukata. It is desirable to draw the cutting pattern so that the yukata is set up for the wearer. Because drawing the cutting pattern requires great skill, it causes difficulties for beginners. In this paper, the authors propose a CAD system that support designers for drawing cutting patterns: (1) by using this CAD system, beginners can draw cutting patterns of yukatas which are in harmony with the wearer's personality; (2) by the texture analysis of the striped pattern and the stencil pattern, the cutting pattern is drawn semi-automatically.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131368637","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}
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