Pub Date : 2013-03-11DOI: 10.1109/WEMDCD.2013.6525173
Wei Wang, B. Fahimi
Existing position sensorless methods rely on (1) one-one correspondence between magnetic characteristics of SRM and rotor position and (2) access to terminal quantities (i.e. voltage and current) for all phases. The occurrence of a fault in one or more phases will prohibit the necessary access to the phase/s and as such introduces a challenge to successful implementation of existing position sensing technique. This paper introduces a generalized strategy for sensorless operation of SRM under single and multi-phase faults using existing sensorless method. Experimental results of a four phase SRM drive with different numbers of faulty phases are presented to validate the proposed methods.
{"title":"Fault tolerant control of adjustable speed switched reluctance motor drives","authors":"Wei Wang, B. Fahimi","doi":"10.1109/WEMDCD.2013.6525173","DOIUrl":"https://doi.org/10.1109/WEMDCD.2013.6525173","url":null,"abstract":"Existing position sensorless methods rely on (1) one-one correspondence between magnetic characteristics of SRM and rotor position and (2) access to terminal quantities (i.e. voltage and current) for all phases. The occurrence of a fault in one or more phases will prohibit the necessary access to the phase/s and as such introduces a challenge to successful implementation of existing position sensing technique. This paper introduces a generalized strategy for sensorless operation of SRM under single and multi-phase faults using existing sensorless method. Experimental results of a four phase SRM drive with different numbers of faulty phases are presented to validate the proposed methods.","PeriodicalId":133392,"journal":{"name":"2013 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126968371","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 : 2013-03-11DOI: 10.1109/WEMDCD.2013.6525163
E. Agamloh, A. Cavagnino
This paper presents a high-level overview of the issues and challenges relating to high efficiency induction machine design for industrial applications. First, a brief overview of the classical approach to machine design is presented, followed by a commentary on contemporary design using finite element method and design optimization techniques. The issues, challenges and opportunities of improving the efficiency of induction motors are discussed and some interesting results of stack lengthening investigations are presented.
{"title":"High efficiency design of induction machines for industrial applications","authors":"E. Agamloh, A. Cavagnino","doi":"10.1109/WEMDCD.2013.6525163","DOIUrl":"https://doi.org/10.1109/WEMDCD.2013.6525163","url":null,"abstract":"This paper presents a high-level overview of the issues and challenges relating to high efficiency induction machine design for industrial applications. First, a brief overview of the classical approach to machine design is presented, followed by a commentary on contemporary design using finite element method and design optimization techniques. The issues, challenges and opportunities of improving the efficiency of induction motors are discussed and some interesting results of stack lengthening investigations are presented.","PeriodicalId":133392,"journal":{"name":"2013 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126976389","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 : 2013-03-11DOI: 10.1109/WEMDCD.2013.6525172
D. Casadei, G. Serra, A. Tani, L. Zarri
Among all control methods for induction motor drives, Direct Torque Control (DTC) is considered particularly interesting being independent of machine rotor parameters and requiring no speed or position sensors. The basic DTC scheme is characterized by the absence of coordinate transformations, current regulators and PWM signals generators. In spite of its simplicity, DTC allows a good torque control in steady state and transient operating conditions to be obtained. However, the presence of hysteresis controllers for flux and torque lead to torque and current ripple and variable switching frequency operation for the voltage source inverter. This paper is aimed to briefly recall DTC principles and their intrinsic problems, and to discuss possible control strategies to improve the operating characteristics. Due to its basic principle, DTC technique is well suited for exploiting the improved number of voltage vectors available with multilevel and multiphase converters. A discussion is also carried out in order to emphasize the potentiality of induction motor drives based on these new power converter topologies.
{"title":"Direct Torque Control for induction machines: A technology status review","authors":"D. Casadei, G. Serra, A. Tani, L. Zarri","doi":"10.1109/WEMDCD.2013.6525172","DOIUrl":"https://doi.org/10.1109/WEMDCD.2013.6525172","url":null,"abstract":"Among all control methods for induction motor drives, Direct Torque Control (DTC) is considered particularly interesting being independent of machine rotor parameters and requiring no speed or position sensors. The basic DTC scheme is characterized by the absence of coordinate transformations, current regulators and PWM signals generators. In spite of its simplicity, DTC allows a good torque control in steady state and transient operating conditions to be obtained. However, the presence of hysteresis controllers for flux and torque lead to torque and current ripple and variable switching frequency operation for the voltage source inverter. This paper is aimed to briefly recall DTC principles and their intrinsic problems, and to discuss possible control strategies to improve the operating characteristics. Due to its basic principle, DTC technique is well suited for exploiting the improved number of voltage vectors available with multilevel and multiphase converters. A discussion is also carried out in order to emphasize the potentiality of induction motor drives based on these new power converter topologies.","PeriodicalId":133392,"journal":{"name":"2013 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133704950","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 : 2013-03-11DOI: 10.1109/WEMDCD.2013.6525161
O. Drubel
Large Synchronous Generators are the fundamental machines in nuclear, fossil and alternative energy generation. Large 4-pole turbo-generators reach 2191 MVA with torques of 12.6 MNm. This torque-level is even small in comparison with the Three Georges hydro generators, which have less speed and reach up to 96MNm. The market of both kinds of machines is a very limited one. The backbone of the energy market is given by gas-turbine-and wind-turbine driven generators. Beside smaller asynchronous and synchronous generators up to 6 MW, which are driven by the wind-turbine over a gearbox, direct drives are used with large synchronous generators either with permanent magnets or a field winding in the rotor. Generators with large numbers of machines per year as well as extreme large generators are based upon highly sophisticated design and calculation methods. Salient 4-pole synchronous generators for instance must be very reliable and optimized in design due to the number of machines, which are going into application each year. The development process is based for all large synchronous generators on analytical and numerical calculation methods. Numerical field calculation is a powerful tool for the design in these electrical machines. Developed methods and programs enable the skilled engineer to solve challenging field problems, which occur in reality. Analytical methods are nevertheless the backbone to calculate synchronous generators as a whole or to evaluate design modifications close to a verified design point.
{"title":"Challenges in calculation and design of large synchronous generators","authors":"O. Drubel","doi":"10.1109/WEMDCD.2013.6525161","DOIUrl":"https://doi.org/10.1109/WEMDCD.2013.6525161","url":null,"abstract":"Large Synchronous Generators are the fundamental machines in nuclear, fossil and alternative energy generation. Large 4-pole turbo-generators reach 2191 MVA with torques of 12.6 MNm. This torque-level is even small in comparison with the Three Georges hydro generators, which have less speed and reach up to 96MNm. The market of both kinds of machines is a very limited one. The backbone of the energy market is given by gas-turbine-and wind-turbine driven generators. Beside smaller asynchronous and synchronous generators up to 6 MW, which are driven by the wind-turbine over a gearbox, direct drives are used with large synchronous generators either with permanent magnets or a field winding in the rotor. Generators with large numbers of machines per year as well as extreme large generators are based upon highly sophisticated design and calculation methods. Salient 4-pole synchronous generators for instance must be very reliable and optimized in design due to the number of machines, which are going into application each year. The development process is based for all large synchronous generators on analytical and numerical calculation methods. Numerical field calculation is a powerful tool for the design in these electrical machines. Developed methods and programs enable the skilled engineer to solve challenging field problems, which occur in reality. Analytical methods are nevertheless the backbone to calculate synchronous generators as a whole or to evaluate design modifications close to a verified design point.","PeriodicalId":133392,"journal":{"name":"2013 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD)","volume":"246 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114374395","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 : 2013-03-11DOI: 10.1109/WEMDCD.2013.6525177
R. Bojoi, M. Pastorelli, J. Bottomley, P. Giangrande, C. Gerada
The control of Brushless Permanent Magnet Motors require rotor position information that can be measured by means of a position sensor. The motion sensorless control aims at eliminating the motor position sensor and its corresponding electronic conditioning circuits, cabling and connectors. Besides a clear cost reduction, the motion sensorless drives have better reliability when compared with their position sensor-based counterparts. The research conducted in the last two decades has provided many different solutions that are used in many applications. Nevertheless, the literature reports just a few survey papers dealing with this important topic. This paper intends providing a comprehensive review of the sensorless control solutions, including the machine influence on the sensorless drive performance.
{"title":"Sensorless control of PM motor drives — A technology status review","authors":"R. Bojoi, M. Pastorelli, J. Bottomley, P. Giangrande, C. Gerada","doi":"10.1109/WEMDCD.2013.6525177","DOIUrl":"https://doi.org/10.1109/WEMDCD.2013.6525177","url":null,"abstract":"The control of Brushless Permanent Magnet Motors require rotor position information that can be measured by means of a position sensor. The motion sensorless control aims at eliminating the motor position sensor and its corresponding electronic conditioning circuits, cabling and connectors. Besides a clear cost reduction, the motion sensorless drives have better reliability when compared with their position sensor-based counterparts. The research conducted in the last two decades has provided many different solutions that are used in many applications. Nevertheless, the literature reports just a few survey papers dealing with this important topic. This paper intends providing a comprehensive review of the sensorless control solutions, including the machine influence on the sensorless drive performance.","PeriodicalId":133392,"journal":{"name":"2013 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125061780","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 : 2013-03-11DOI: 10.1109/WEMDCD.2013.6525174
F. Betin, M. Moghadasian, V. Lanfranchi, G. Capolino
In this paper, an advanced control technique using fuzzy logic tuned by a genetic algorithm is proposed in order to obtain a high accuracy positioning of a six-phase induction machine. The proposed control scheme is fully insensitive to mechanical configuration changes as well to loss of one up to three phases. The effectiveness of the method has been validated experimentally using a dedicated set-up based on a 90W-2 pole squirrel-cage induction machine and a 42V dc bus.
{"title":"Fault-tolerant control of six-phase induction machines using combined fuzzy logic and genetic algorithms","authors":"F. Betin, M. Moghadasian, V. Lanfranchi, G. Capolino","doi":"10.1109/WEMDCD.2013.6525174","DOIUrl":"https://doi.org/10.1109/WEMDCD.2013.6525174","url":null,"abstract":"In this paper, an advanced control technique using fuzzy logic tuned by a genetic algorithm is proposed in order to obtain a high accuracy positioning of a six-phase induction machine. The proposed control scheme is fully insensitive to mechanical configuration changes as well to loss of one up to three phases. The effectiveness of the method has been validated experimentally using a dedicated set-up based on a 90W-2 pole squirrel-cage induction machine and a 42V dc bus.","PeriodicalId":133392,"journal":{"name":"2013 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133054556","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 : 2013-03-11DOI: 10.1109/WEMDCD.2013.6525183
S. H. Kia, H. Henao, G. Capolino
This paper investigates recent advances on modern digital signal processing techniques for induction machines fault diagnosis. An intensive research has been performed in order to improve performances of fault diagnosis techniques by applying enhanced signal processing methods during past few years. Since non-invasive sensors offer relatively simple and cost effective fault diagnosis capabilities, more emphasis is given to stator current analysis rather than vibration or acoustic analysis for electrical machines. Here, further interests have been paid on modern signal processing techniques with a special attention to their performances in time domain, frequency domain and time-frequency domain. A comprehensive review is done on recently developed methods which are applied to the stator current collected from induction machine based test-rigs with electrical and/or mechanical faults. It will be demonstrated that numerous techniques have been adapted to induction machines diagnosis. They have been developed primarily based upon basic digital signal processing techniques in order to achieve a more reliable identification and quantification of fault indexes.
{"title":"Efficient digital signal processing techniques for induction machines fault diagnosis","authors":"S. H. Kia, H. Henao, G. Capolino","doi":"10.1109/WEMDCD.2013.6525183","DOIUrl":"https://doi.org/10.1109/WEMDCD.2013.6525183","url":null,"abstract":"This paper investigates recent advances on modern digital signal processing techniques for induction machines fault diagnosis. An intensive research has been performed in order to improve performances of fault diagnosis techniques by applying enhanced signal processing methods during past few years. Since non-invasive sensors offer relatively simple and cost effective fault diagnosis capabilities, more emphasis is given to stator current analysis rather than vibration or acoustic analysis for electrical machines. Here, further interests have been paid on modern signal processing techniques with a special attention to their performances in time domain, frequency domain and time-frequency domain. A comprehensive review is done on recently developed methods which are applied to the stator current collected from induction machine based test-rigs with electrical and/or mechanical faults. It will be demonstrated that numerous techniques have been adapted to induction machines diagnosis. They have been developed primarily based upon basic digital signal processing techniques in order to achieve a more reliable identification and quantification of fault indexes.","PeriodicalId":133392,"journal":{"name":"2013 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133146376","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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