Pub Date : 2018-09-01DOI: 10.1109/ICELMACH.2018.8506947
C. Bals, D. Gerling
This paper proposes a method to link currents and flux linkages of induction machines by combining trigonometric and scattered data interpolation. The currents and flux linkages of the stator and rotor are gained from transient electromagnetic finite-element-simulations. The relation between currents and flux linkages is a superposition of rotating angle dependency and nonlinear material properties. Both dependencies can be described with the developped hybrid interpolation approach. The validation results show a good agreement between the interpolated signals and comparative signals from finite-element-analysis. The benefit of the proposed method is that it can be coupled with the differential equations to obtain an induction machine model with high accuracy.
{"title":"Hybrid Interpolation Approach to Link Currents and Flux Linkages of Induction Machines","authors":"C. Bals, D. Gerling","doi":"10.1109/ICELMACH.2018.8506947","DOIUrl":"https://doi.org/10.1109/ICELMACH.2018.8506947","url":null,"abstract":"This paper proposes a method to link currents and flux linkages of induction machines by combining trigonometric and scattered data interpolation. The currents and flux linkages of the stator and rotor are gained from transient electromagnetic finite-element-simulations. The relation between currents and flux linkages is a superposition of rotating angle dependency and nonlinear material properties. Both dependencies can be described with the developped hybrid interpolation approach. The validation results show a good agreement between the interpolated signals and comparative signals from finite-element-analysis. The benefit of the proposed method is that it can be coupled with the differential equations to obtain an induction machine model with high accuracy.","PeriodicalId":292261,"journal":{"name":"2018 XIII International Conference on Electrical Machines (ICEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114689718","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 : 2018-09-01DOI: 10.1109/ICELMACH.2018.8507038
P. Florin, R. Mircea, Pop Adrian-Cornel, R. Martis, C. Martis
This paper presents a comparative analysis of three different motor structures designed for an electric power steering system (EPS) used in automotive industry. For automotive applications, high torque and power density, low torque ripple and wide speed range are needed. In order to make the comparison as transparent as possible, at first, the existing Interior Permanent Magnet Synchronous Motor (IPMSM) has been modeled by means of Finite Element Method (FEM) so as to check the electromagnetic behavior, (i.e. flux density, cogging and electromagnetic torque) weight and costs of active materials. In fact, the specifications for the new designed motors coincide with the characteristics of the IPMSM mentioned above (mounted on an actual EPS unit). Next step was the design, optimization and modelling of the two new machines i.e. one PMSM with a different rotor structure regarding the magnets shape (V-shape design) and finally a synchronous reluctance machine (SynRM). Moreover, real-time model in the loop (RTMiL) programs are created to simulate transient behavior of the machines.
{"title":"Comparative Analysis for an Electric Power Steering System","authors":"P. Florin, R. Mircea, Pop Adrian-Cornel, R. Martis, C. Martis","doi":"10.1109/ICELMACH.2018.8507038","DOIUrl":"https://doi.org/10.1109/ICELMACH.2018.8507038","url":null,"abstract":"This paper presents a comparative analysis of three different motor structures designed for an electric power steering system (EPS) used in automotive industry. For automotive applications, high torque and power density, low torque ripple and wide speed range are needed. In order to make the comparison as transparent as possible, at first, the existing Interior Permanent Magnet Synchronous Motor (IPMSM) has been modeled by means of Finite Element Method (FEM) so as to check the electromagnetic behavior, (i.e. flux density, cogging and electromagnetic torque) weight and costs of active materials. In fact, the specifications for the new designed motors coincide with the characteristics of the IPMSM mentioned above (mounted on an actual EPS unit). Next step was the design, optimization and modelling of the two new machines i.e. one PMSM with a different rotor structure regarding the magnets shape (V-shape design) and finally a synchronous reluctance machine (SynRM). Moreover, real-time model in the loop (RTMiL) programs are created to simulate transient behavior of the machines.","PeriodicalId":292261,"journal":{"name":"2018 XIII International Conference on Electrical Machines (ICEM)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124339070","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 : 2018-09-01DOI: 10.1109/ICELMACH.2018.8506854
A. Di Gerlando, K. EIShawarby, G. Foglia, R. Perini
The paper concerns the study of multi-winding transformers (MWT), with inverter fed LV primary windings and one MV secondary winding connected to the mains. Typical application fields are medium power WECSs, consisting of modular components (multi-module generator and transformer). The transformer design and modeling aspects are considered, and its performances are estimated, considering inverter command parameters, current waveforms, copper and core losses, accounting for the effects due to harmonics.
{"title":"Design and Modeling of Multi-Winding Transformers Interfacing Inverters and Mains","authors":"A. Di Gerlando, K. EIShawarby, G. Foglia, R. Perini","doi":"10.1109/ICELMACH.2018.8506854","DOIUrl":"https://doi.org/10.1109/ICELMACH.2018.8506854","url":null,"abstract":"The paper concerns the study of multi-winding transformers (MWT), with inverter fed LV primary windings and one MV secondary winding connected to the mains. Typical application fields are medium power WECSs, consisting of modular components (multi-module generator and transformer). The transformer design and modeling aspects are considered, and its performances are estimated, considering inverter command parameters, current waveforms, copper and core losses, accounting for the effects due to harmonics.","PeriodicalId":292261,"journal":{"name":"2018 XIII International Conference on Electrical Machines (ICEM)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124035144","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 : 2018-09-01DOI: 10.1109/ICELMACH.2018.8506741
Mingjin Hu, W. Hua, Jianjian Meng, G. Zhao
In this paper, the mathematical model of a dual three-phase flux-switching permanent magnet (FSPM) machine is established and investigated by both methods, namely, the double-dq-frame approach and the vector space decomposition (VSD) theory. Firstly, the dual three-phase PM flux-linkages and stator winding inductances are analyzed via finite element analysis and the major harmonics are considered. Then, an improved transformation based on VSD is proposed to transform the major harmonics into DC components, and shows better decoupled harmonics mapping relationship compared to the double-dq approach. It can also convert the $theta$ · functional inductance matrix to constant form in six dimensions. Finally, the voltage equation and torque equation are derived and compared for both methods. The double-dq approach may be good at interpreting current unbalance, while the VSD approach is more efficient to handle harmonics and results a simple machine model. The work in this paper lays a foundation for the control strategies of the dual three-phase FSPM machine.
{"title":"Modeling of a Dual Three-Phase Flux-Switching Permanent Magnet Machine Using Two Methods","authors":"Mingjin Hu, W. Hua, Jianjian Meng, G. Zhao","doi":"10.1109/ICELMACH.2018.8506741","DOIUrl":"https://doi.org/10.1109/ICELMACH.2018.8506741","url":null,"abstract":"In this paper, the mathematical model of a dual three-phase flux-switching permanent magnet (FSPM) machine is established and investigated by both methods, namely, the double-dq-frame approach and the vector space decomposition (VSD) theory. Firstly, the dual three-phase PM flux-linkages and stator winding inductances are analyzed via finite element analysis and the major harmonics are considered. Then, an improved transformation based on VSD is proposed to transform the major harmonics into DC components, and shows better decoupled harmonics mapping relationship compared to the double-dq approach. It can also convert the $theta$ · functional inductance matrix to constant form in six dimensions. Finally, the voltage equation and torque equation are derived and compared for both methods. The double-dq approach may be good at interpreting current unbalance, while the VSD approach is more efficient to handle harmonics and results a simple machine model. The work in this paper lays a foundation for the control strategies of the dual three-phase FSPM machine.","PeriodicalId":292261,"journal":{"name":"2018 XIII International Conference on Electrical Machines (ICEM)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126570713","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 : 2018-09-01DOI: 10.1109/ICELMACH.2018.8506882
P. Tlali, R.-J. Wang, S. Gerber
This paper presents the 2D finite element analysis (FEA) based design optimization of a surface-mounted permanent magnet vernier machine (PMVM), and its comparison against the permanent magnet synchronous machine (PMSM) in a 15kW wind generator application. The PMVM's operating principle is briefly discussed, and attention is given to the selection of the number of stator slots, armature poles and rotor poles in order to achieve low active mass and good torque quality. The designed PMVM is also compared to a benchmark PMSM in terms of, amongst others, torque per mass, torque density, torque quality and power factor, by utilizing 2D FEA. It is concluded that the PMVM can be a competitive alternative to the PMSM in this application.
{"title":"Comparison of PM Vernier and Conventional Synchronous 15 kW Wind Generators","authors":"P. Tlali, R.-J. Wang, S. Gerber","doi":"10.1109/ICELMACH.2018.8506882","DOIUrl":"https://doi.org/10.1109/ICELMACH.2018.8506882","url":null,"abstract":"This paper presents the 2D finite element analysis (FEA) based design optimization of a surface-mounted permanent magnet vernier machine (PMVM), and its comparison against the permanent magnet synchronous machine (PMSM) in a 15kW wind generator application. The PMVM's operating principle is briefly discussed, and attention is given to the selection of the number of stator slots, armature poles and rotor poles in order to achieve low active mass and good torque quality. The designed PMVM is also compared to a benchmark PMSM in terms of, amongst others, torque per mass, torque density, torque quality and power factor, by utilizing 2D FEA. It is concluded that the PMVM can be a competitive alternative to the PMSM in this application.","PeriodicalId":292261,"journal":{"name":"2018 XIII International Conference on Electrical Machines (ICEM)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127911711","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 : 2018-09-01DOI: 10.1109/ICELMACH.2018.8506707
P. Panagiotou, I. Arvanitakis, N. Lophitis, K. Gyftakis
The wide range of applications using induction machines has been enhanced with the rapid evolution of condition monitoring and variable speed drives. The latter two, along with their constantly growing demands, have raised the necessity of new approaches and techniques in fault diagnostics. A reliable solution to this matter, has proven to be the monitoring of stray magnetic flux. Accounted for in different locations on the machine's peripheral area and with different measurement techniques, the stray flux provides valuable information for fault detection and identification. This paper aims to apply one of these diagnostic strategies and the related measurement of stray flux using FEM, to evaluate its performance and diagnostic capability on two machines of different size and power rating and conclude on the quantitative effectiveness of such strategies.
{"title":"FEM Study of Induction Machines Suffering from Rotor Electrical Faults Using Stray Flux Signature Analysis","authors":"P. Panagiotou, I. Arvanitakis, N. Lophitis, K. Gyftakis","doi":"10.1109/ICELMACH.2018.8506707","DOIUrl":"https://doi.org/10.1109/ICELMACH.2018.8506707","url":null,"abstract":"The wide range of applications using induction machines has been enhanced with the rapid evolution of condition monitoring and variable speed drives. The latter two, along with their constantly growing demands, have raised the necessity of new approaches and techniques in fault diagnostics. A reliable solution to this matter, has proven to be the monitoring of stray magnetic flux. Accounted for in different locations on the machine's peripheral area and with different measurement techniques, the stray flux provides valuable information for fault detection and identification. This paper aims to apply one of these diagnostic strategies and the related measurement of stray flux using FEM, to evaluate its performance and diagnostic capability on two machines of different size and power rating and conclude on the quantitative effectiveness of such strategies.","PeriodicalId":292261,"journal":{"name":"2018 XIII International Conference on Electrical Machines (ICEM)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121739674","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 : 2018-09-01DOI: 10.1109/ICELMACH.2018.8506928
E. Devillers, M. Hecquet, X. Cimetiere, Jean-Philippe Lecointe, J. L. Besnerais, T. Lubin
This article presents an experimental setup dedicated to the analysis of magnetic noise and vibrations in radial flux electrical machines. Both electromagnetic excitation and structural response of the electrical machine are simplified to provide the first benchmark of the phenomenon of electromagnetically -excited noise and vibrations. The test bench properties as well as the magnetic, vibration and acoustic upcoming extensive measurements are shared to the scientific community, providing a clear reference case to compare different modeling and simulation approaches.
{"title":"Experimental Benchmark for Magnetic Noise and Vibrations Analysis in Electrical Machines","authors":"E. Devillers, M. Hecquet, X. Cimetiere, Jean-Philippe Lecointe, J. L. Besnerais, T. Lubin","doi":"10.1109/ICELMACH.2018.8506928","DOIUrl":"https://doi.org/10.1109/ICELMACH.2018.8506928","url":null,"abstract":"This article presents an experimental setup dedicated to the analysis of magnetic noise and vibrations in radial flux electrical machines. Both electromagnetic excitation and structural response of the electrical machine are simplified to provide the first benchmark of the phenomenon of electromagnetically -excited noise and vibrations. The test bench properties as well as the magnetic, vibration and acoustic upcoming extensive measurements are shared to the scientific community, providing a clear reference case to compare different modeling and simulation approaches.","PeriodicalId":292261,"journal":{"name":"2018 XIII International Conference on Electrical Machines (ICEM)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129988606","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 : 2018-09-01DOI: 10.1109/ICELMACH.2018.8507049
G. Rezazadeh, S. Vaschetto, F. Tahami, G. Capolino, H. Henao, Z. Nasiri-Gheidari
Multi-phase induction motors feature a high fault-tolerance capability that makes them suitable for safety critical applications. On the other hand, concentrated winding is more fault-tolerant than conventional distributed winding. Therefore, the general idea is to use concentrated winding on the six-phase induction motor to gain more fault-tolerance capacity. Using concentrated winding has several advantages over distributed one, but it has the disadvantage of higher distortion of air gap flux density, which affects the motor performance significantly. In this paper, some concentrated windings are studied analytically by using the winding function analysis, and the layout with better performance is chosen to be compared with the conventional 2-pole distributed winding. With reference to the lamination of a 90W symmetrical six-phase induction motor, both calculation and simulation results show that the performance of the selected concentrated winding is not comparable with the distributed winding. Performance measurements from pervious works, are used for evaluation.
{"title":"Analysis of Six-Phase Induction Motor with Distributed and Concentrated Windings by Using the Winding Function Method","authors":"G. Rezazadeh, S. Vaschetto, F. Tahami, G. Capolino, H. Henao, Z. Nasiri-Gheidari","doi":"10.1109/ICELMACH.2018.8507049","DOIUrl":"https://doi.org/10.1109/ICELMACH.2018.8507049","url":null,"abstract":"Multi-phase induction motors feature a high fault-tolerance capability that makes them suitable for safety critical applications. On the other hand, concentrated winding is more fault-tolerant than conventional distributed winding. Therefore, the general idea is to use concentrated winding on the six-phase induction motor to gain more fault-tolerance capacity. Using concentrated winding has several advantages over distributed one, but it has the disadvantage of higher distortion of air gap flux density, which affects the motor performance significantly. In this paper, some concentrated windings are studied analytically by using the winding function analysis, and the layout with better performance is chosen to be compared with the conventional 2-pole distributed winding. With reference to the lamination of a 90W symmetrical six-phase induction motor, both calculation and simulation results show that the performance of the selected concentrated winding is not comparable with the distributed winding. Performance measurements from pervious works, are used for evaluation.","PeriodicalId":292261,"journal":{"name":"2018 XIII International Conference on Electrical Machines (ICEM)","volume":"111 3S 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130190988","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 : 2018-09-01DOI: 10.1109/ICELMACH.2018.8506813
G. Narjes, B. Ponick
This paper reviews several methods to identify the eddy current losses in the permanent magnets of a high-speed high power density synchronous machine for an aircraft application. The rotor losses of such a machine are of particular importance, as the cooling of the rotor is poor. They originate from higher time harmonics in the voltage supply of the machine from inverters and from the spatial harmonics due to the slot openings of the stator. Because a preliminary loss calculation should be possible without time-consuming finite-element simulations, especially during the design phase, a novel combined analytical-numerical method is shown and paired with another analytical method in order to consider the different loss sources and to save calculation time. The result is compared to a finite-element simulation.
{"title":"Novel Method for the Determination of Eddy Current Losses in the Permanent Magnets of a High-Speed Synchronous Machine","authors":"G. Narjes, B. Ponick","doi":"10.1109/ICELMACH.2018.8506813","DOIUrl":"https://doi.org/10.1109/ICELMACH.2018.8506813","url":null,"abstract":"This paper reviews several methods to identify the eddy current losses in the permanent magnets of a high-speed high power density synchronous machine for an aircraft application. The rotor losses of such a machine are of particular importance, as the cooling of the rotor is poor. They originate from higher time harmonics in the voltage supply of the machine from inverters and from the spatial harmonics due to the slot openings of the stator. Because a preliminary loss calculation should be possible without time-consuming finite-element simulations, especially during the design phase, a novel combined analytical-numerical method is shown and paired with another analytical method in order to consider the different loss sources and to save calculation time. The result is compared to a finite-element simulation.","PeriodicalId":292261,"journal":{"name":"2018 XIII International Conference on Electrical Machines (ICEM)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134043149","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 : 2018-09-01DOI: 10.1109/ICELMACH.2018.8506729
P. Mertikas, S. Dallas, D. Spathis, T. Kourmpelis, I. Georgakopoulos, J. Prousalidis, D. Lyridis, L. Nakos, P. Mitrou, V. Georgiou
This paper summarizes the main results of the European project ELEMED namely the introduction of cold-ironing as an appealing alternative towards greener ports in the East Mediterranean corridor and second the establishment of the concept of applying hybrid-electric vessels to short-sea shipping cases. Moreover, the opportunities of turning the ports as smart energy hubs, where among others Renewable Energy Sources are deployed, is also discussed.
{"title":"Furthering the Electricity to Ships and Ports: the ELEMED Project","authors":"P. Mertikas, S. Dallas, D. Spathis, T. Kourmpelis, I. Georgakopoulos, J. Prousalidis, D. Lyridis, L. Nakos, P. Mitrou, V. Georgiou","doi":"10.1109/ICELMACH.2018.8506729","DOIUrl":"https://doi.org/10.1109/ICELMACH.2018.8506729","url":null,"abstract":"This paper summarizes the main results of the European project ELEMED namely the introduction of cold-ironing as an appealing alternative towards greener ports in the East Mediterranean corridor and second the establishment of the concept of applying hybrid-electric vessels to short-sea shipping cases. Moreover, the opportunities of turning the ports as smart energy hubs, where among others Renewable Energy Sources are deployed, is also discussed.","PeriodicalId":292261,"journal":{"name":"2018 XIII International Conference on Electrical Machines (ICEM)","volume":"308 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133951658","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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