Pub Date : 1993-06-01DOI: 10.1109/ISIE.1993.268753
E. Bogalecka
Three proposals of a control system for a double-fed induction machine working as a generator are presented. Possibilities of the parallel operation of induction and synchronous generators are also investigated. A simplified model of synchronous machine dynamics have been assumed. Computer simulation results are presented.<>
{"title":"Dynamics of the power control of a double fed induction generator connected to the soft power grid","authors":"E. Bogalecka","doi":"10.1109/ISIE.1993.268753","DOIUrl":"https://doi.org/10.1109/ISIE.1993.268753","url":null,"abstract":"Three proposals of a control system for a double-fed induction machine working as a generator are presented. Possibilities of the parallel operation of induction and synchronous generators are also investigated. A simplified model of synchronous machine dynamics have been assumed. Computer simulation results are presented.<<ETX>>","PeriodicalId":267349,"journal":{"name":"ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123938737","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 : 1993-06-01DOI: 10.1109/ISIE.1993.268758
V. Katić, D. Dapcevic, V. Vučković
The paper analyses voltage and current harmonics generated by two types of AC/DC power converters-standard or line-commutated, and novel PWM controlled. Special consideration is given to the analysis of harmonics in transient states, which are usually neglected. Results show a significant increase of both current and voltage harmonics during transient-states. Their values are compared with harmonic limiting standard VDE 106 (Germany)-both short and long term limits are exceeded during transient-states. This phenomenon may be a source of unwanted negative effects, especially for DC motor drives with long transient-states, so it must be taken into account when harmonic minimization equipment is designed.<>
{"title":"AC/DC converter line side harmonics in transient and steady state","authors":"V. Katić, D. Dapcevic, V. Vučković","doi":"10.1109/ISIE.1993.268758","DOIUrl":"https://doi.org/10.1109/ISIE.1993.268758","url":null,"abstract":"The paper analyses voltage and current harmonics generated by two types of AC/DC power converters-standard or line-commutated, and novel PWM controlled. Special consideration is given to the analysis of harmonics in transient states, which are usually neglected. Results show a significant increase of both current and voltage harmonics during transient-states. Their values are compared with harmonic limiting standard VDE 106 (Germany)-both short and long term limits are exceeded during transient-states. This phenomenon may be a source of unwanted negative effects, especially for DC motor drives with long transient-states, so it must be taken into account when harmonic minimization equipment is designed.<<ETX>>","PeriodicalId":267349,"journal":{"name":"ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128792006","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 : 1993-06-01DOI: 10.1109/ISIE.1993.268808
M. Sumner, G. Asher, I. Aksu
The dynamic performance of an indirect vector controlled induction motor drive requires a good knowledge of the motor parameters. For the scheme based on rotor position measurement and inner current loops, the rotor time constant (T/sub r/) is the most influential time varying parameter. In this study an extension of the reactive identification scheme is presented and it is shown that the scheme can track the motor time constant during both dynamic torque and dynamic flux conditions. The scheme is used in conjunction with a rotor flux orientated controller. Problems such as the variation of mutual inductance with flux level and digital conversion and calculation inaccuracy when noise is present on the measurement values are discussed. Simulation studies show that the method follows T/sub r/ correctly under all operating conditions with a good accuracy.<>
{"title":"Rotor time constant identification for vector controlled induction motor drives under dynamic operating conditions","authors":"M. Sumner, G. Asher, I. Aksu","doi":"10.1109/ISIE.1993.268808","DOIUrl":"https://doi.org/10.1109/ISIE.1993.268808","url":null,"abstract":"The dynamic performance of an indirect vector controlled induction motor drive requires a good knowledge of the motor parameters. For the scheme based on rotor position measurement and inner current loops, the rotor time constant (T/sub r/) is the most influential time varying parameter. In this study an extension of the reactive identification scheme is presented and it is shown that the scheme can track the motor time constant during both dynamic torque and dynamic flux conditions. The scheme is used in conjunction with a rotor flux orientated controller. Problems such as the variation of mutual inductance with flux level and digital conversion and calculation inaccuracy when noise is present on the measurement values are discussed. Simulation studies show that the method follows T/sub r/ correctly under all operating conditions with a good accuracy.<<ETX>>","PeriodicalId":267349,"journal":{"name":"ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127761144","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 : 1993-06-01DOI: 10.1109/ISIE.1993.268721
K. E. Addoweesh, M. Al-Khalidi
AC voltage chopping techniques used in AC voltage controllers represent an attractive alternative to phase angle controlled techniques. Moreover, using microprocessors to determine switching instances makes it possible to generate an output voltage with better characteristics. This paper describes a novel chopping technique in which both the amplitude and the phase angle of the fundamental component of the output voltage can be controlled. Detailed analysis of the proposed technique is presented. Experimental results verifying the theoretical results are also given.<>
{"title":"AC chopping technique with phase and voltage control","authors":"K. E. Addoweesh, M. Al-Khalidi","doi":"10.1109/ISIE.1993.268721","DOIUrl":"https://doi.org/10.1109/ISIE.1993.268721","url":null,"abstract":"AC voltage chopping techniques used in AC voltage controllers represent an attractive alternative to phase angle controlled techniques. Moreover, using microprocessors to determine switching instances makes it possible to generate an output voltage with better characteristics. This paper describes a novel chopping technique in which both the amplitude and the phase angle of the fundamental component of the output voltage can be controlled. Detailed analysis of the proposed technique is presented. Experimental results verifying the theoretical results are also given.<<ETX>>","PeriodicalId":267349,"journal":{"name":"ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121374548","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 : 1993-06-01DOI: 10.1109/ISIE.1993.268828
H. de Azevedo, H. Hey, R. Paschoareli, R. C. Rende
The authors propose a fuzzy controller applied for controlling a half-bridge DC-DC PWM zero-voltage zero-current switching converter'. The circuit operation follows the concept of lossless commutation. The authors present the analysis and simulation results for this converter, operating in closed-loop with fuzzy controller. The aim of the fuzzy logic controller is to control the output voltage of the converter so that this voltage remains constant despite the load or the supply voltage variations. The plant performance is analyzed by simulation for different operating conditions in terms of change in load and supply voltage. The control system presented good results in terms of response time and robustness.<>
{"title":"A fuzzy logic controller for half-bridge DC-DC PWM ZVZCS converter to high power applications","authors":"H. de Azevedo, H. Hey, R. Paschoareli, R. C. Rende","doi":"10.1109/ISIE.1993.268828","DOIUrl":"https://doi.org/10.1109/ISIE.1993.268828","url":null,"abstract":"The authors propose a fuzzy controller applied for controlling a half-bridge DC-DC PWM zero-voltage zero-current switching converter'. The circuit operation follows the concept of lossless commutation. The authors present the analysis and simulation results for this converter, operating in closed-loop with fuzzy controller. The aim of the fuzzy logic controller is to control the output voltage of the converter so that this voltage remains constant despite the load or the supply voltage variations. The plant performance is analyzed by simulation for different operating conditions in terms of change in load and supply voltage. The control system presented good results in terms of response time and robustness.<<ETX>>","PeriodicalId":267349,"journal":{"name":"ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123894796","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 : 1993-06-01DOI: 10.1109/ISIE.1993.268771
P. Esteban, C. Briand, M. Courvoisier
The authors present a conception approach for distributed control of flexible manufacturing system (FMS). This control is based on five levels, with specific attributes: the long term planning level; the forecast scheduling level; the supervision level; the sub-sets coordination level; and the local control level. By nature, the two first ones are nonreal-time control levels. Conversely, the other levels are heavily constrained by manufacturing real time events. The specific competences of each level are defined, but the integration method to obtain the best cooperation between these specialities has to be described: this last point composes the main aim of this paper.<>
{"title":"Integration of the real time levels of a multilevel hierarchical control; application to a flexible assembly cell","authors":"P. Esteban, C. Briand, M. Courvoisier","doi":"10.1109/ISIE.1993.268771","DOIUrl":"https://doi.org/10.1109/ISIE.1993.268771","url":null,"abstract":"The authors present a conception approach for distributed control of flexible manufacturing system (FMS). This control is based on five levels, with specific attributes: the long term planning level; the forecast scheduling level; the supervision level; the sub-sets coordination level; and the local control level. By nature, the two first ones are nonreal-time control levels. Conversely, the other levels are heavily constrained by manufacturing real time events. The specific competences of each level are defined, but the integration method to obtain the best cooperation between these specialities has to be described: this last point composes the main aim of this paper.<<ETX>>","PeriodicalId":267349,"journal":{"name":"ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130767677","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 : 1993-06-01DOI: 10.1109/ISIE.1993.268832
M. Terashima, T. Ashikaga, Y. Kataoka, Y. Nakano
An inertia-lowering control system that uses a disturbance observer to apparently reduce inertia was developed. In order to realize this control with induction motors, vector-controlled induction motors and DC motors are compared, then equations and machine constants needed for designing systems were clarified. A digital signal processor and a microprocessor were adopted for induction motor control, and good results are obtained for the inertia-lowering experiment.<>
{"title":"Inertia-lowering control of motors","authors":"M. Terashima, T. Ashikaga, Y. Kataoka, Y. Nakano","doi":"10.1109/ISIE.1993.268832","DOIUrl":"https://doi.org/10.1109/ISIE.1993.268832","url":null,"abstract":"An inertia-lowering control system that uses a disturbance observer to apparently reduce inertia was developed. In order to realize this control with induction motors, vector-controlled induction motors and DC motors are compared, then equations and machine constants needed for designing systems were clarified. A digital signal processor and a microprocessor were adopted for induction motor control, and good results are obtained for the inertia-lowering experiment.<<ETX>>","PeriodicalId":267349,"journal":{"name":"ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings","volume":"413 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131726098","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 : 1993-06-01DOI: 10.1109/ISIE.1993.268798
A. Gilg, G. Schmidt
The authors describe a method of landmark based vehicle guidance used for navigation in corridors and similar indoor environments. Motion tasks are specified by a symbolic course description without providing explicit geometric information. A video sensor system is used for environmental perception and landmark detection. Aspects of sensor data processing and vehicle guidance are discussed. Experimental results are reported.<>
{"title":"Landmark-oriented visual navigation of a mobile robot","authors":"A. Gilg, G. Schmidt","doi":"10.1109/ISIE.1993.268798","DOIUrl":"https://doi.org/10.1109/ISIE.1993.268798","url":null,"abstract":"The authors describe a method of landmark based vehicle guidance used for navigation in corridors and similar indoor environments. Motion tasks are specified by a symbolic course description without providing explicit geometric information. A video sensor system is used for environmental perception and landmark detection. Aspects of sensor data processing and vehicle guidance are discussed. Experimental results are reported.<<ETX>>","PeriodicalId":267349,"journal":{"name":"ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123482869","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 : 1993-06-01DOI: 10.1109/ISIE.1993.268725
J. Espinoza, G. Joós, P. Ziogas
PWM current source inverters (CSI's) are usually operated with a fixed pattern and fed from a thyristor rectifier controlled current source. Transient response of the output current is slow and input power factor is low. This paper proposes a symmetrical PWM CSI topology with a two loop control structure. A voltage regulated current source inverter ensures instantaneous output voltage control through on-line PWM current generation. The PWM rectifier maintains unity displacement power factor, thus improving the power factor. Furthermore, it maintains the DC link current to a value such that the inverter modulation index remains high at all times; this results in reduced voltage harmonic distortion at the output. The topology is particularly well suited for fast fluctuating loads. It also has regenerative capabilities, inherent short circuit protection and increased reliability. The paper describes the power circuit topology and the two control loop structure and presents controller design considerations and procedures. The complete topology is implemented on a 2 kVA unit and experimental results confirm theoretical and simulation results.<>
{"title":"An integrated three-phase voltage regulated current source inverter topology","authors":"J. Espinoza, G. Joós, P. Ziogas","doi":"10.1109/ISIE.1993.268725","DOIUrl":"https://doi.org/10.1109/ISIE.1993.268725","url":null,"abstract":"PWM current source inverters (CSI's) are usually operated with a fixed pattern and fed from a thyristor rectifier controlled current source. Transient response of the output current is slow and input power factor is low. This paper proposes a symmetrical PWM CSI topology with a two loop control structure. A voltage regulated current source inverter ensures instantaneous output voltage control through on-line PWM current generation. The PWM rectifier maintains unity displacement power factor, thus improving the power factor. Furthermore, it maintains the DC link current to a value such that the inverter modulation index remains high at all times; this results in reduced voltage harmonic distortion at the output. The topology is particularly well suited for fast fluctuating loads. It also has regenerative capabilities, inherent short circuit protection and increased reliability. The paper describes the power circuit topology and the two control loop structure and presents controller design considerations and procedures. The complete topology is implemented on a 2 kVA unit and experimental results confirm theoretical and simulation results.<<ETX>>","PeriodicalId":267349,"journal":{"name":"ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114566572","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 : 1993-06-01DOI: 10.1109/ISIE.1993.268766
C. Pan, T. Chen, Chen-Ming Hung
A three-active-switches voltage-fed current controlled inverter is proposed for three-phase induction motor drives. Each phase of the induction motor can be controlled by only one active switch. It is seen that application of the proposed inverter will result in a constant rotating field with purely sinusoidal waveform. Hence the motor can run smoothly in wide speed range without incurring torque oscillation. In addition to the fewer switches used, implementation of the inverter is also very simple. Hence, the cost of the proposed inverter can be reduced.<>
{"title":"A low cost voltage-fed current controlled inverter for induction motor drives","authors":"C. Pan, T. Chen, Chen-Ming Hung","doi":"10.1109/ISIE.1993.268766","DOIUrl":"https://doi.org/10.1109/ISIE.1993.268766","url":null,"abstract":"A three-active-switches voltage-fed current controlled inverter is proposed for three-phase induction motor drives. Each phase of the induction motor can be controlled by only one active switch. It is seen that application of the proposed inverter will result in a constant rotating field with purely sinusoidal waveform. Hence the motor can run smoothly in wide speed range without incurring torque oscillation. In addition to the fewer switches used, implementation of the inverter is also very simple. Hence, the cost of the proposed inverter can be reduced.<<ETX>>","PeriodicalId":267349,"journal":{"name":"ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115887526","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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