Pub Date : 2003-06-09DOI: 10.1109/ISIE.2003.1267253
R. Ganesh, J. Quaicoe, R. Venkatesan
A new robust torque control algorithm for induction motors is suggested to obtain high performance as well as high efficiency, under direct torque control scheme. This algorithm has two stages. In the first stage maximum torque is achieved with optimal currents and voltages for any given speed, resulting in high efficiency. In the second stage, in the steady state, the controller corrects itself for stator resistance variations, thereby achieving robustness in the control scheme. The direct torque control implementation eliminates the need for vector transformations and results in a quick response making it suitable for a wide variety of applications such as electric vehicles (EYs). Simulation results show the performance of the proposed robust torque control scheme in response to high-speed demands and stator resistance variations.
{"title":"Robust scheme for maximum torque control of induction motors","authors":"R. Ganesh, J. Quaicoe, R. Venkatesan","doi":"10.1109/ISIE.2003.1267253","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267253","url":null,"abstract":"A new robust torque control algorithm for induction motors is suggested to obtain high performance as well as high efficiency, under direct torque control scheme. This algorithm has two stages. In the first stage maximum torque is achieved with optimal currents and voltages for any given speed, resulting in high efficiency. In the second stage, in the steady state, the controller corrects itself for stator resistance variations, thereby achieving robustness in the control scheme. The direct torque control implementation eliminates the need for vector transformations and results in a quick response making it suitable for a wide variety of applications such as electric vehicles (EYs). Simulation results show the performance of the proposed robust torque control scheme in response to high-speed demands and stator resistance variations.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124509091","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 : 2003-06-09DOI: 10.1109/ISIE.2003.1267284
R. Gules, L. Pfitscher, L. C. Franco
A new PWM dc-dc converter is introduced in which large voltage step-up ratios can be achieved without high duty-cycle, with low voltage and current stress and without transformer. The proposed circuit is an extension of the boost interleaved converter, incorporating a multistage capacitor multiplier. A simple nondissipative snubber can be used reducing the reverse recovery current of the diodes and also obtaining low turn-on and turn-off losses. The modularity of the structure allows the increment of the current, voltage and power levels, using the same range of components and maintaining high efficiency, only increasing the number of series and parallel stages. The paper gives a theoretical analysis, and experimental data on a 400 W example that was built and tested: 24 Vdc input, 200 Vdc output, and 40 kHz switching frequency. The measured performance agreed well with the theoretical predictions and the measured efficiency obtained is equal to 95% at full load.
{"title":"An interleaved boost DC-DC converter with large conversion ratio","authors":"R. Gules, L. Pfitscher, L. C. Franco","doi":"10.1109/ISIE.2003.1267284","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267284","url":null,"abstract":"A new PWM dc-dc converter is introduced in which large voltage step-up ratios can be achieved without high duty-cycle, with low voltage and current stress and without transformer. The proposed circuit is an extension of the boost interleaved converter, incorporating a multistage capacitor multiplier. A simple nondissipative snubber can be used reducing the reverse recovery current of the diodes and also obtaining low turn-on and turn-off losses. The modularity of the structure allows the increment of the current, voltage and power levels, using the same range of components and maintaining high efficiency, only increasing the number of series and parallel stages. The paper gives a theoretical analysis, and experimental data on a 400 W example that was built and tested: 24 Vdc input, 200 Vdc output, and 40 kHz switching frequency. The measured performance agreed well with the theoretical predictions and the measured efficiency obtained is equal to 95% at full load.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121306589","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 : 2003-06-09DOI: 10.1109/ISIE.2003.1267262
M. F. Quélhas, A. Petraglia, A.P. Baruqui
Circuits with lower power consumption are suitable to system miniaturization, because small-size and long-lasting batteries can be employed. On the other hand, switched-capacitor filters are commonly used in interfacing analog and digital circuitry. This paper presents a methodology for estimating the power consumption of those filters, to allow evaluation of design alternatives for a given application. A computer aided algorithm has also been developed. Illustrative examples are shown, as well, to verify the usefulness of the technique.
{"title":"Power consumption estimation in SC filters","authors":"M. F. Quélhas, A. Petraglia, A.P. Baruqui","doi":"10.1109/ISIE.2003.1267262","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267262","url":null,"abstract":"Circuits with lower power consumption are suitable to system miniaturization, because small-size and long-lasting batteries can be employed. On the other hand, switched-capacitor filters are commonly used in interfacing analog and digital circuitry. This paper presents a methodology for estimating the power consumption of those filters, to allow evaluation of design alternatives for a given application. A computer aided algorithm has also been developed. Illustrative examples are shown, as well, to verify the usefulness of the technique.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122026921","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 : 2003-06-09DOI: 10.1109/ISIE.2003.1267913
C. Canesin, F. Gonçalves
This paper presents a new single-phase interleaved high power factor boost pre-regulator operating in critical conduction mode, where the switches and boost diode performing zero current commutations during its turn-off, eliminating the disadvantages related to the reverse recovery losses and electromagnetic interference problems of the boost diode, when operating in the continuous conduction mode. The interleaving technique is applied in the power cell, providing a significant input current ripple reduction in comparison to discontinuous conduction operation. This paper presents a complete modeling for the converter operating in the critical conduction mode, resulting in an improved design procedure for interleaved techniques with high input power factor, a complete design procedure, and main simulation results from a design example with two interleaved cells rated at 1 kW, 400 V output voltage and 220 V rms input voltage.
{"title":"Single-phase high power-factor boost ZCS pre-regulator operating in critical conduction mode","authors":"C. Canesin, F. Gonçalves","doi":"10.1109/ISIE.2003.1267913","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267913","url":null,"abstract":"This paper presents a new single-phase interleaved high power factor boost pre-regulator operating in critical conduction mode, where the switches and boost diode performing zero current commutations during its turn-off, eliminating the disadvantages related to the reverse recovery losses and electromagnetic interference problems of the boost diode, when operating in the continuous conduction mode. The interleaving technique is applied in the power cell, providing a significant input current ripple reduction in comparison to discontinuous conduction operation. This paper presents a complete modeling for the converter operating in the critical conduction mode, resulting in an improved design procedure for interleaved techniques with high input power factor, a complete design procedure, and main simulation results from a design example with two interleaved cells rated at 1 kW, 400 V output voltage and 220 V rms input voltage.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"19 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125851653","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 : 2003-06-09DOI: 10.1109/ISIE.2003.1267311
J. Basilio, J.A. Silva, L. Rolim
In this paper the design of a control system for rotor flux oriented controlled induction motor drives using H/sub /spl infin// optimal control theory is carried out. The variable to be controlled is the shaft velocity. Two H/sub /spl infin// problems are formulated and solved: (i) a 1-block problem with the view to maximizing the system performance; (ii) a 2-block problem with the weights initially chosen for maximizing both the system performance (transient response) and the system tolerance to uncertainty in the plant model (robust performance), and in the sequel the weights are modified to account for transient performance and noise attenuation. All the designed controllers have been implemented in a real system, and the results are shown in the paper.
{"title":"H/sub /spl infin// optimal design of rotor flux oriented controlled induction motor drives","authors":"J. Basilio, J.A. Silva, L. Rolim","doi":"10.1109/ISIE.2003.1267311","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267311","url":null,"abstract":"In this paper the design of a control system for rotor flux oriented controlled induction motor drives using H/sub /spl infin// optimal control theory is carried out. The variable to be controlled is the shaft velocity. Two H/sub /spl infin// problems are formulated and solved: (i) a 1-block problem with the view to maximizing the system performance; (ii) a 2-block problem with the weights initially chosen for maximizing both the system performance (transient response) and the system tolerance to uncertainty in the plant model (robust performance), and in the sequel the weights are modified to account for transient performance and noise attenuation. All the designed controllers have been implemented in a real system, and the results are shown in the paper.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127464878","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 : 2003-06-09DOI: 10.1109/ISIE.2003.1267985
R.R. Gomes, D.C.B.V. da Silva, J.L. da Silva Neto
This paper describes an electromagnetic levitation experience developed at UFRJ using the real-time control toolbox available with MATLAB. This work shows the model used in the position control of a steel ball, the control design procedure and the prototype. The main application of this experience was focused in the vertical position control of a Maglev train system, also researched at LIFRJ.
{"title":"Electromagnetic levitation using MATLAB/sub /spl copy// real time control toolbox","authors":"R.R. Gomes, D.C.B.V. da Silva, J.L. da Silva Neto","doi":"10.1109/ISIE.2003.1267985","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267985","url":null,"abstract":"This paper describes an electromagnetic levitation experience developed at UFRJ using the real-time control toolbox available with MATLAB. This work shows the model used in the position control of a steel ball, the control design procedure and the prototype. The main application of this experience was focused in the vertical position control of a Maglev train system, also researched at LIFRJ.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125467543","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 : 2003-06-09DOI: 10.1109/ISIE.2003.1267286
N. Vázquez, C. Hernández, J. Alvarez, J. Arau
In this paper a controller based on the variable structure theory is analyzed: the sliding mode control. The sliding mode control was proposed to control dc/dc converters, due to the good characteristics introduced to the complete system. In order to regulate the output voltage, the sliding mode control require a current loop in order to assure the stability of the system, the inclusion of this extra loop increases the cost. This paper presents an alternative method to obtain the good characteristics of the control strategy without the use of current sensors.
{"title":"Sliding mode control for DC/DC converters: a new sliding surface","authors":"N. Vázquez, C. Hernández, J. Alvarez, J. Arau","doi":"10.1109/ISIE.2003.1267286","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267286","url":null,"abstract":"In this paper a controller based on the variable structure theory is analyzed: the sliding mode control. The sliding mode control was proposed to control dc/dc converters, due to the good characteristics introduced to the complete system. In order to regulate the output voltage, the sliding mode control require a current loop in order to assure the stability of the system, the inclusion of this extra loop increases the cost. This paper presents an alternative method to obtain the good characteristics of the control strategy without the use of current sensors.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116128244","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 : 2003-06-09DOI: 10.1109/ISIE.2003.1267911
M. Orabi, T. Ninomiya
Designers trying to optimize the performance of boost PFC converter circuit faces many difficult circuit design issues. Most of prior researches chose the storage capacitor depending on the selected hold-up time or the output ripple percentage. Recently, the contribution of the output capacitor to the PFC system stability is highlighted. Therefore, in this issue the design steps are discussed depending on the three choices, output ripple, hold-up time and stability. It is clear that any design must take the minimum required storage capacitor as step-1 in the design and then apply for any other specification like hold-up time or ripple percentage.
{"title":"An optimum design of boost power-factor-correction converter","authors":"M. Orabi, T. Ninomiya","doi":"10.1109/ISIE.2003.1267911","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267911","url":null,"abstract":"Designers trying to optimize the performance of boost PFC converter circuit faces many difficult circuit design issues. Most of prior researches chose the storage capacitor depending on the selected hold-up time or the output ripple percentage. Recently, the contribution of the output capacitor to the PFC system stability is highlighted. Therefore, in this issue the design steps are discussed depending on the three choices, output ripple, hold-up time and stability. It is clear that any design must take the minimum required storage capacitor as step-1 in the design and then apply for any other specification like hold-up time or ripple percentage.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131935759","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 : 2003-06-09DOI: 10.1109/ISIE.2003.1267949
T. York, Q. Smit, J. L. Davidson, B. Grieve
In recent years industrial tomography has emerged as a valuable tool for interrogating the internals of a variety of process vessels. A popular approach is to inject electrical current and then from measurements of the resulting boundary voltages to reconstruct a cross-sectional image representing the distribution of materials in the vessel. In many cases the process takes place in a hazardous environment and consequently there is a need for certified safe equipment. This paper reports on the design, construction and testing of the worlds first intrinsically safe electrical tomography system. To achieve certification zener barrier diodes and intrinsically safe relay- modules provide electrical isolation from the hazardous environment. The instrument is certified for operation in a zone O environment and has been operating successfully on a production pressure filter for 2 years.
{"title":"An intrinsically safe electrical tomography system","authors":"T. York, Q. Smit, J. L. Davidson, B. Grieve","doi":"10.1109/ISIE.2003.1267949","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267949","url":null,"abstract":"In recent years industrial tomography has emerged as a valuable tool for interrogating the internals of a variety of process vessels. A popular approach is to inject electrical current and then from measurements of the resulting boundary voltages to reconstruct a cross-sectional image representing the distribution of materials in the vessel. In many cases the process takes place in a hazardous environment and consequently there is a need for certified safe equipment. This paper reports on the design, construction and testing of the worlds first intrinsically safe electrical tomography system. To achieve certification zener barrier diodes and intrinsically safe relay- modules provide electrical isolation from the hazardous environment. The instrument is certified for operation in a zone O environment and has been operating successfully on a production pressure filter for 2 years.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133535847","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 : 2003-06-09DOI: 10.1109/ISIE.2003.1267313
Tom Yamamoto, Jun Aoyama, Koutaro Nakano
Model predictive controllers have been widely used in process industries as an advanced control technology. Among them, generalized predictive controller (GPC) has been proposed by Clarke, el al. Especially, since the GPC is designed based on multi-step prediction, it is well known that the GPC is effective for systems with ambiguous time-delays and/or time-variant time-delays. On the other hand, most real systems have uncertainty, and self-tuning controllers and robust controllers are proposed to cope with such uncertainties. According to the self-tuning control scheme, the stability is not necessarily guaranteed in connection with the convergence of estimated parameters. Moreover, in robust control, the control system becomes quite conservative, and tracking properties are not good. In this paper, a new design scheme of robust self-tuning 2-degree-of-freedom GPC. That is, the closed-loop controller is designed so that the robust stability is satisfied, and the pre-filter is designed to improve the transient response in an on-line manner. According to the newly proposed control scheme, the transient property for the set point response can be improved keeping the robust stability. Finally, the proposed scheme is numerically evaluate on two simulation examples.
{"title":"A design of 2DOF robust self-tuning GPC","authors":"Tom Yamamoto, Jun Aoyama, Koutaro Nakano","doi":"10.1109/ISIE.2003.1267313","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267313","url":null,"abstract":"Model predictive controllers have been widely used in process industries as an advanced control technology. Among them, generalized predictive controller (GPC) has been proposed by Clarke, el al. Especially, since the GPC is designed based on multi-step prediction, it is well known that the GPC is effective for systems with ambiguous time-delays and/or time-variant time-delays. On the other hand, most real systems have uncertainty, and self-tuning controllers and robust controllers are proposed to cope with such uncertainties. According to the self-tuning control scheme, the stability is not necessarily guaranteed in connection with the convergence of estimated parameters. Moreover, in robust control, the control system becomes quite conservative, and tracking properties are not good. In this paper, a new design scheme of robust self-tuning 2-degree-of-freedom GPC. That is, the closed-loop controller is designed so that the robust stability is satisfied, and the pre-filter is designed to improve the transient response in an on-line manner. According to the newly proposed control scheme, the transient property for the set point response can be improved keeping the robust stability. Finally, the proposed scheme is numerically evaluate on two simulation examples.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133539480","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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