Pub Date : 2003-06-09DOI: 10.1109/ISIE.2003.1267296
H. Rodrigues, T. Gáspár, J. Metrôlho, E. Lopes
This paper describes the fist stage of a prototype that is being developed using a personal digital assistant (PDA) device in surveillance tasks as part of a monitoring system. The work is being developed and tested using the features of these more and more diffused devices. In the system design, an interface board was used with an embedded controller area network (CAN) to act as a link between the PDA device and the neighbour environment. This application intends to be used in the monitoring and control of environmental factors. The system's architecture and some already developed software blocks are presented in the following paper sections.
{"title":"PDA as surveillance device in monitoring system","authors":"H. Rodrigues, T. Gáspár, J. Metrôlho, E. Lopes","doi":"10.1109/ISIE.2003.1267296","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267296","url":null,"abstract":"This paper describes the fist stage of a prototype that is being developed using a personal digital assistant (PDA) device in surveillance tasks as part of a monitoring system. The work is being developed and tested using the features of these more and more diffused devices. In the system design, an interface board was used with an embedded controller area network (CAN) to act as a link between the PDA device and the neighbour environment. This application intends to be used in the monitoring and control of environmental factors. The system's architecture and some already developed software blocks are presented in the following paper sections.","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":"115387707","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.2003.1267299
F. T. Wakabayashi, C. Canesin
This paper presents a new static model for tubular fluorescent lamps (T12 bulb) operated at high frequencies. The main goal of this paper is to investigate the effects of ambient temperature and nominal switching frequency of operation in the static characteristics of tubular fluorescent lamps. The methodology for obtaining the model is based on several two-dimensional mathematical regressions, used to provide the behavior of the fluorescent lamp according to different independent variables, namely: power processed through the lamp and ambient temperature. In addition, the proposed model can be easily converted to a lamp equivalent resistance model, which can be useful for ballast designers. Finally, the curves obtained using the new model are compared to the correspondent experimental data, in order to verify the accuracy of the proposed methodology.
{"title":"A new model for tubular fluorescent lamps operated at high frequencies for dimmable applications","authors":"F. T. Wakabayashi, C. Canesin","doi":"10.1109/ISIE.2003.1267299","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267299","url":null,"abstract":"This paper presents a new static model for tubular fluorescent lamps (T12 bulb) operated at high frequencies. The main goal of this paper is to investigate the effects of ambient temperature and nominal switching frequency of operation in the static characteristics of tubular fluorescent lamps. The methodology for obtaining the model is based on several two-dimensional mathematical regressions, used to provide the behavior of the fluorescent lamp according to different independent variables, namely: power processed through the lamp and ambient temperature. In addition, the proposed model can be easily converted to a lamp equivalent resistance model, which can be useful for ballast designers. Finally, the curves obtained using the new model are compared to the correspondent experimental data, in order to verify the accuracy of the proposed methodology.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"106 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":"115568385","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.2003.1267907
G. Bastidas, E. Villani, F. Junqueira, P. E. Miyagi
The design of supervisory system for automated environments can be seen as a task involving techniques and methods of two main areas: software and control engineering. In this context, the purpose of this work is to introduce a new approach for open distributed supervisory system design based on the merging of traditional techniques of software engineering (such as object-oriented concepts) with formal models of discrete events dynamic systems- (such as Petri nets). In this first level of abstraction, the reference model of open distributed processing (RM-ODP) is used as a standard architectural framework for the construction of open distributed system. Based on the RM-ODP, the unified modeling language (UML) diagrams are built as a second level of abstraction. Finally, the Petri nets (the third level of abstraction) are used throughout the process in order to guarantee the coherence among the UML models from requirement analysis to implementation, and to provide formal models of the system.
{"title":"Open distributed supervisory system design using Petri nets","authors":"G. Bastidas, E. Villani, F. Junqueira, P. E. Miyagi","doi":"10.1109/ISIE.2003.1267907","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267907","url":null,"abstract":"The design of supervisory system for automated environments can be seen as a task involving techniques and methods of two main areas: software and control engineering. In this context, the purpose of this work is to introduce a new approach for open distributed supervisory system design based on the merging of traditional techniques of software engineering (such as object-oriented concepts) with formal models of discrete events dynamic systems- (such as Petri nets). In this first level of abstraction, the reference model of open distributed processing (RM-ODP) is used as a standard architectural framework for the construction of open distributed system. Based on the RM-ODP, the unified modeling language (UML) diagrams are built as a second level of abstraction. Finally, the Petri nets (the third level of abstraction) are used throughout the process in order to guarantee the coherence among the UML models from requirement analysis to implementation, and to provide formal models of the system.","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":"121126165","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.2003.1267915
C. Sánchez, F. Ibáñez, F. Gonzalez
To increase power density in power converters we can increase the switching frequency as this enables the use of smaller capacitors and inductors. However, this technique has the disadvantage of increasing power loss in the switches. We can solve this problem by using a quasi-resonant circuit in the inverter DC link (RDCL). This circuit reduces its output voltage when the inverter switches switch. This is therefore performed at zero voltage and the switching power losses are zero. RDCL is used before a DC/AC converter, and so its behaviour must be characterised for reference in the control design. This characterisation is also used for adopting the RDCL output impedance and the inverter input in order to improve the system dynamic response. In this work, we present the results of the behavioural analysis of a resonant DC-link structure. It is based on the structure described in [S.Y.R. Hui et el., January 1996]. The resonance frequency was increased to 1.5 MHz and this enabled the use of RDCL in combination with inverters switching at 200 kHz. As a result the magnetic component requirement was strict. Different simulations were made and a 1 kW prototype was built to monitor the behaviour under different conditions.
{"title":"Analysis of a voltage clamp quasi-resonant DC-link used in high frequency DC-AC converters","authors":"C. Sánchez, F. Ibáñez, F. Gonzalez","doi":"10.1109/ISIE.2003.1267915","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267915","url":null,"abstract":"To increase power density in power converters we can increase the switching frequency as this enables the use of smaller capacitors and inductors. However, this technique has the disadvantage of increasing power loss in the switches. We can solve this problem by using a quasi-resonant circuit in the inverter DC link (RDCL). This circuit reduces its output voltage when the inverter switches switch. This is therefore performed at zero voltage and the switching power losses are zero. RDCL is used before a DC/AC converter, and so its behaviour must be characterised for reference in the control design. This characterisation is also used for adopting the RDCL output impedance and the inverter input in order to improve the system dynamic response. In this work, we present the results of the behavioural analysis of a resonant DC-link structure. It is based on the structure described in [S.Y.R. Hui et el., January 1996]. The resonance frequency was increased to 1.5 MHz and this enabled the use of RDCL in combination with inverters switching at 200 kHz. As a result the magnetic component requirement was strict. Different simulations were made and a 1 kW prototype was built to monitor the behaviour under different conditions.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"14 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":"123367766","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.2003.1267974
J. D. da Costa, H. T. Camara, E. Carati
This paper presents a prototype for electrical machines control using a microcomputer PC compatible using pulse width modulation (PWM). This prototype can be used to implement real-time digital control techniques for electrical machines in realistic situations. A PMCP16-200 board is used to interface the microcomputer with the proposed setup. Moreover, the use of a microcomputer simplifies control law and PWM techniques implementation since the supervisory software can be developed using the standard C language. Experimental results are presented to demonstrate the versatility of the proposed scheme when used to closed loop control of induction motors.
{"title":"A microprocessor based prototype for electrical machines control using PWM modulation","authors":"J. D. da Costa, H. T. Camara, E. Carati","doi":"10.1109/ISIE.2003.1267974","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267974","url":null,"abstract":"This paper presents a prototype for electrical machines control using a microcomputer PC compatible using pulse width modulation (PWM). This prototype can be used to implement real-time digital control techniques for electrical machines in realistic situations. A PMCP16-200 board is used to interface the microcomputer with the proposed setup. Moreover, the use of a microcomputer simplifies control law and PWM techniques implementation since the supervisory software can be developed using the standard C language. Experimental results are presented to demonstrate the versatility of the proposed scheme when used to closed loop control of induction motors.","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":"121363517","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.2003.1267329
K. D. Coelho, I. Barbi
A new four-switch converter topology is presented. This topology is intended for use in high input voltages and low power applications, especially auxiliary supplies. It's mainly advantage is the clamping voltage on the switches: half of the input voltage. It works like the flyback converter, with one direction power flow. The four switches can be set on with the same pulse, with a small delay time in the off signal of the internal switches after the external ones. The reliability of the converter is increased with the series position of the switches with load. This reliability combined with simplicity of the way it is commanded, makes this converter very well suited for small power applications. This paper presents the principle of operation of the proposed converter. Each stage with the main characteristics, and the main equations are also presented. Experimental data prove the suitability of the proposed converter.
{"title":"A three level double-ended flyback converter","authors":"K. D. Coelho, I. Barbi","doi":"10.1109/ISIE.2003.1267329","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267329","url":null,"abstract":"A new four-switch converter topology is presented. This topology is intended for use in high input voltages and low power applications, especially auxiliary supplies. It's mainly advantage is the clamping voltage on the switches: half of the input voltage. It works like the flyback converter, with one direction power flow. The four switches can be set on with the same pulse, with a small delay time in the off signal of the internal switches after the external ones. The reliability of the converter is increased with the series position of the switches with load. This reliability combined with simplicity of the way it is commanded, makes this converter very well suited for small power applications. This paper presents the principle of operation of the proposed converter. Each stage with the main characteristics, and the main equations are also presented. Experimental data prove the suitability of the proposed converter.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"174 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":"115695040","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.2003.1267247
J. L. Domingos, D. Andrade, M. Freitas, H. de Paula
This work presents a drive strategy for a linear motion switched reluctance motor that attempts to speed control with four-quadrant operation. The magnetization curves and phase inductance profiles are obtained experimentally. These are mathematically represented using Fourier series approach. A mathematical model to represent the machine dynamics is then developed and presented. A drive structure is proposed that covers the converter, the speed and current controllers, and the phase switching mode. Computational simulations are achieved by use of the mathematic model and the control strategy and include motions in both directions, comprising the start, speed control, and braking until total stop of the machine. From the results, the proposed drive strategy indicates a desirable operational versatility.
{"title":"Four-quadrant operation drive strategy for a linear switched reluctance motor","authors":"J. L. Domingos, D. Andrade, M. Freitas, H. de Paula","doi":"10.1109/ISIE.2003.1267247","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267247","url":null,"abstract":"This work presents a drive strategy for a linear motion switched reluctance motor that attempts to speed control with four-quadrant operation. The magnetization curves and phase inductance profiles are obtained experimentally. These are mathematically represented using Fourier series approach. A mathematical model to represent the machine dynamics is then developed and presented. A drive structure is proposed that covers the converter, the speed and current controllers, and the phase switching mode. Computational simulations are achieved by use of the mathematic model and the control strategy and include motions in both directions, comprising the start, speed control, and braking until total stop of the machine. From the results, the proposed drive strategy indicates a desirable operational versatility.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"3 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":"123928016","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.2003.1267323
C. D. de Angelo, Guillermo R. Bossio, J. Solsona, G. García, M. Valla
A sensorless strategy for speed control of permanent motors driving an unknown load torque is presented. The proposed strategy uses an extended non-linear reduced-order observer that includes information about the waveform of the EMF generated by the motor, which is neither sinusoidal nor trapezoidal. In order to improve the drive performance, the unknown disturbance torque is estimated by means of an adaptive law, and is incorporated as feedforward signal into the control loop. It allows the realization of torque control avoiding position sensor and with minimum torque ripple. Simulation results that validate the proposal are shown.
{"title":"Sensorless speed control of permanent magnet motors driving an unknown load","authors":"C. D. de Angelo, Guillermo R. Bossio, J. Solsona, G. García, M. Valla","doi":"10.1109/ISIE.2003.1267323","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267323","url":null,"abstract":"A sensorless strategy for speed control of permanent motors driving an unknown load torque is presented. The proposed strategy uses an extended non-linear reduced-order observer that includes information about the waveform of the EMF generated by the motor, which is neither sinusoidal nor trapezoidal. In order to improve the drive performance, the unknown disturbance torque is estimated by means of an adaptive law, and is incorporated as feedforward signal into the control loop. It allows the realization of torque control avoiding position sensor and with minimum torque ripple. Simulation results that validate the proposal are shown.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"51 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":"124068700","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.2003.1267285
S. Abe, J. Yamamoto, T. Zaitsu, T. Ninomiya
This paper presents the fast transient response improvement of two-stage DC-DC converter by using the current feedback control. The two-stage converter consists of a buck converter used as the first-stage and a half-bridge converter used as the second-stage. The proposed control system using the first-stage inductor current and the conventional voltage-feedback control system are analyzed and compared. As a result, it is analytically clarified that the crossover frequency becomes higher by adding the first-stage inductor current in the feedback control loop. The experimental confirmation was obtained with a good agreement, and the effectiveness of the proposed control strategy was verified.
{"title":"Fast transient response of two-stage DC-DC converter with low-voltage/high-current output","authors":"S. Abe, J. Yamamoto, T. Zaitsu, T. Ninomiya","doi":"10.1109/ISIE.2003.1267285","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267285","url":null,"abstract":"This paper presents the fast transient response improvement of two-stage DC-DC converter by using the current feedback control. The two-stage converter consists of a buck converter used as the first-stage and a half-bridge converter used as the second-stage. The proposed control system using the first-stage inductor current and the conventional voltage-feedback control system are analyzed and compared. As a result, it is analytically clarified that the crossover frequency becomes higher by adding the first-stage inductor current in the feedback control loop. The experimental confirmation was obtained with a good agreement, and the effectiveness of the proposed control strategy was verified.","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":"130817331","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.2003.1267265
Jossana Ferreira, J. de Paiva, A. Salazar, F.E.F. Castro, S.N.D. Lisboa
This work presents the radial positioning control of a bearingless machine rotor that was supported by DSP (digital signal processor). The studied bearingless machine is a three-phase induction machine that presents divided stator windings, coiled rotor and it is in the vertical position. The radial positioning control needs precision and appropriated answer time what is obtained with the DSP easily. To the machine position control is used a proportional derivative each one for each direction that indicate the rotor displacement. To the machine position control is used a proportional derivative controller (PD) that is based on two sensor measurement, each one for each direction that indicate the rotor displacement. To the current control is used a proportional integrative controller (PI) that is also implemented in DSP which acts by measured information in the windings. The machine is supplied from six inverters, which works guided, by PWM (pulse width modulation) sign from the DSP. The control machine was accomplished in a common PC initially and this work contributes with the transition to the system controlled by a DSP showing a comparison between the two implementations.
{"title":"DSP utilization in radial positioning control of bearingless machine","authors":"Jossana Ferreira, J. de Paiva, A. Salazar, F.E.F. Castro, S.N.D. Lisboa","doi":"10.1109/ISIE.2003.1267265","DOIUrl":"https://doi.org/10.1109/ISIE.2003.1267265","url":null,"abstract":"This work presents the radial positioning control of a bearingless machine rotor that was supported by DSP (digital signal processor). The studied bearingless machine is a three-phase induction machine that presents divided stator windings, coiled rotor and it is in the vertical position. The radial positioning control needs precision and appropriated answer time what is obtained with the DSP easily. To the machine position control is used a proportional derivative each one for each direction that indicate the rotor displacement. To the machine position control is used a proportional derivative controller (PD) that is based on two sensor measurement, each one for each direction that indicate the rotor displacement. To the current control is used a proportional integrative controller (PI) that is also implemented in DSP which acts by measured information in the windings. The machine is supplied from six inverters, which works guided, by PWM (pulse width modulation) sign from the DSP. The control machine was accomplished in a common PC initially and this work contributes with the transition to the system controlled by a DSP showing a comparison between the two implementations.","PeriodicalId":166431,"journal":{"name":"2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692)","volume":"15 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":"127403994","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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