Pub Date : 2012-11-12DOI: 10.1109/ICELMACH.2012.6349938
F. Dumas, P. Enrici, D. Matt
This paper explains a design and the comparison of two multi-disc permanent magnet motor. The actuator must provide answers to the volume constraint and torque. This application is employed in land transport for aeronautical field. The axial flux motors become interesting when obtaining large surfaces of air-gap with the traditional machines is no possible. Indeed, surfaces of air-gap are more important in comparison with a radial flux machine, and, in a given volume, they allow to obtain a higher torque. After having shown the multi-air gap structure, we describe the design method from elementary cells. That's why two types the disc-type motor were selected. This paper clearly shows the efficient topology of a disc-type multi-air gap machine.
{"title":"Design and comparison of two multi-disc permanent magnet motors for aeronautical application","authors":"F. Dumas, P. Enrici, D. Matt","doi":"10.1109/ICELMACH.2012.6349938","DOIUrl":"https://doi.org/10.1109/ICELMACH.2012.6349938","url":null,"abstract":"This paper explains a design and the comparison of two multi-disc permanent magnet motor. The actuator must provide answers to the volume constraint and torque. This application is employed in land transport for aeronautical field. The axial flux motors become interesting when obtaining large surfaces of air-gap with the traditional machines is no possible. Indeed, surfaces of air-gap are more important in comparison with a radial flux machine, and, in a given volume, they allow to obtain a higher torque. After having shown the multi-air gap structure, we describe the design method from elementary cells. That's why two types the disc-type motor were selected. This paper clearly shows the efficient topology of a disc-type multi-air gap machine.","PeriodicalId":6309,"journal":{"name":"2012 XXth International Conference on Electrical Machines","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78443752","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 : 2012-11-12DOI: 10.1109/ICELMACH.2012.6349900
B. Virlan, A. Simion, L. Livadaru, S. Benelghali, R. Outbib
This paper presents a study upon a new configuration of an outer rotor induction motor with multipole stator winding. The new design comes out as a result of a reconfiguration process of a real model by means of FEM-based analysis. The main transformation consists in replacement of the regular drum winding with a toroidal one, which allows a high flexibility in changing the number of pole pairs. The purpose is mainly to create the possibility of obtaining a superior torque capability by changing the synchronous speed. The primary study started with the laboratory experimental tests of the basic model followed by a simulation based on finite element method. Further, the drum winding has been replaced with a toroidal (ring) one designed for p = 1, p = 2 and p = 4. In this structure, new simulations have been run in order to make a proper comparison to the real model. The analysis tool used both magneto-dynamic and transient simulations.
本文研究了一种具有多极定子绕组的外转子感应电动机的新结构。新的设计方案是通过基于有限元分析的方法对一个实际模型进行重构的结果。主要的改造包括用环形绕组代替常规卷筒绕组，这使得在改变极对数量方面具有很高的灵活性。其目的主要是通过改变同步速度来创造获得优越转矩能力的可能性。初步研究从基本模型的实验室实验测试开始，然后进行基于有限元法的仿真。此外，鼓形绕组已被为p = 1, p = 2和p = 4设计的环形(环)绕组所取代。在这种结构下，进行了新的仿真，以便与实际模型进行适当的比较。分析工具使用了磁动力学和瞬态模拟。
{"title":"Analysis of a three phase induction motor with outer rotor for multi-speed applications","authors":"B. Virlan, A. Simion, L. Livadaru, S. Benelghali, R. Outbib","doi":"10.1109/ICELMACH.2012.6349900","DOIUrl":"https://doi.org/10.1109/ICELMACH.2012.6349900","url":null,"abstract":"This paper presents a study upon a new configuration of an outer rotor induction motor with multipole stator winding. The new design comes out as a result of a reconfiguration process of a real model by means of FEM-based analysis. The main transformation consists in replacement of the regular drum winding with a toroidal one, which allows a high flexibility in changing the number of pole pairs. The purpose is mainly to create the possibility of obtaining a superior torque capability by changing the synchronous speed. The primary study started with the laboratory experimental tests of the basic model followed by a simulation based on finite element method. Further, the drum winding has been replaced with a toroidal (ring) one designed for p = 1, p = 2 and p = 4. In this structure, new simulations have been run in order to make a proper comparison to the real model. The analysis tool used both magneto-dynamic and transient simulations.","PeriodicalId":6309,"journal":{"name":"2012 XXth International Conference on Electrical Machines","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75756586","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 : 2012-11-12DOI: 10.1109/ICELMACH.2012.6349926
E. Severson, R. Nilssen, T. Undeland, N. Mohan
The bearingless ac homopolar motor has numerous advantages over classical machines for applications such as flywheel energy storage and as a superconducting machine. In this paper, the bearingless ac homopolar motor is analyzed. Inductance matrices, alignment and reluctance torque calculations, suspension winding configurations, and radial suspension force calculations are presented for two rotor structures. Unlike previous literature, expressions for torque interference caused by suspension force winding configurations and effects of d-axis flux on suspension forces are developed and presented. Furthermore, it is demonstrated that each rotor structure can be analyzed as an equivalent classical machine to allow for easy comparison.
{"title":"Analysis of the bearingless AC homopolar motor","authors":"E. Severson, R. Nilssen, T. Undeland, N. Mohan","doi":"10.1109/ICELMACH.2012.6349926","DOIUrl":"https://doi.org/10.1109/ICELMACH.2012.6349926","url":null,"abstract":"The bearingless ac homopolar motor has numerous advantages over classical machines for applications such as flywheel energy storage and as a superconducting machine. In this paper, the bearingless ac homopolar motor is analyzed. Inductance matrices, alignment and reluctance torque calculations, suspension winding configurations, and radial suspension force calculations are presented for two rotor structures. Unlike previous literature, expressions for torque interference caused by suspension force winding configurations and effects of d-axis flux on suspension forces are developed and presented. Furthermore, it is demonstrated that each rotor structure can be analyzed as an equivalent classical machine to allow for easy comparison.","PeriodicalId":6309,"journal":{"name":"2012 XXth International Conference on Electrical Machines","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73038945","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 : 2012-11-12DOI: 10.1109/ICELMACH.2012.6349925
R. Holehouse, K. Atallah, Jiabin Wang
Linear magnetic gears, when coupled with a linear permanent magnet machine, are a high-efficiency, high-reliability and force-dense alternative to traditional linear actuation solutions. It is shown that the force density of a linear magnetic gear is affected by the required output stroke and gear ratio. A technique based on lumped parameter magnetic circuits is presented. It is employed for prediction of the flux density waveforms and the thrust force of the magnetic gear, which are in good agreement with those predicted by magnetostatic finite element analysis. A prototype 3.25:1 linear magnetic gear is described. It is shown that the force capability of the linear magnetic gear can be very sensitive to manufacturing tolerances, in particular those related to the spacing between the pole-piece rings.
{"title":"A linear magnetic gear","authors":"R. Holehouse, K. Atallah, Jiabin Wang","doi":"10.1109/ICELMACH.2012.6349925","DOIUrl":"https://doi.org/10.1109/ICELMACH.2012.6349925","url":null,"abstract":"Linear magnetic gears, when coupled with a linear permanent magnet machine, are a high-efficiency, high-reliability and force-dense alternative to traditional linear actuation solutions. It is shown that the force density of a linear magnetic gear is affected by the required output stroke and gear ratio. A technique based on lumped parameter magnetic circuits is presented. It is employed for prediction of the flux density waveforms and the thrust force of the magnetic gear, which are in good agreement with those predicted by magnetostatic finite element analysis. A prototype 3.25:1 linear magnetic gear is described. It is shown that the force capability of the linear magnetic gear can be very sensitive to manufacturing tolerances, in particular those related to the spacing between the pole-piece rings.","PeriodicalId":6309,"journal":{"name":"2012 XXth International Conference on Electrical Machines","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74222393","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 : 2012-11-12DOI: 10.1109/ICELMACH.2012.6349860
J. Nerg, M. Rilla, V. Ruuskanen, J. Pyrhonen, S. Ruotsalainen
A design process of a direct driven permanent magnet synchronous machine (PMSM) for a full electric sports car is presented. The rotor structure of the machine consists of two permanent magnet layers embedded inside the rotor laminations thus resulting in some inverse saliency. An integer slot stator winding was selected to clearly take advantage of the additional reluctance torque. The performance characteristics of the designed PMSM were calculated utilizing two-dimensional finite element method. Cross-saturation between d- and q-axes was taken into account in the calculation of synchronous inductances. The calculation results are validated with the measurements.
{"title":"Design of direct-driven permanent magnet synchronous motors for an electric sports car","authors":"J. Nerg, M. Rilla, V. Ruuskanen, J. Pyrhonen, S. Ruotsalainen","doi":"10.1109/ICELMACH.2012.6349860","DOIUrl":"https://doi.org/10.1109/ICELMACH.2012.6349860","url":null,"abstract":"A design process of a direct driven permanent magnet synchronous machine (PMSM) for a full electric sports car is presented. The rotor structure of the machine consists of two permanent magnet layers embedded inside the rotor laminations thus resulting in some inverse saliency. An integer slot stator winding was selected to clearly take advantage of the additional reluctance torque. The performance characteristics of the designed PMSM were calculated utilizing two-dimensional finite element method. Cross-saturation between d- and q-axes was taken into account in the calculation of synchronous inductances. The calculation results are validated with the measurements.","PeriodicalId":6309,"journal":{"name":"2012 XXth International Conference on Electrical Machines","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74297918","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 : 2012-11-12DOI: 10.1109/ICELMACH.2012.6349854
A. Takahashi, S. Kikuchi, H. Mikami, K. Ide, A. Binder
In order to boost up the calculation precision of d-q space vector analysis, new approach for estimating parameters of line-starting permanent magnet motors is developed. Introducing leakage-flux and magnetizing-flux variations dependant on not only stator excitation but also rotor one, transient characteristics and steady-state performance are calculated. Thorough the comparison with finite element analysis, the validity of the proposed method is verified. Especially, it is notable that it can provide at short times accurate quasi-steady-state average torque and precise critical load torque for self-starting.
{"title":"d-q Space vector analysis for line-starting permanent magnet synchronous motors","authors":"A. Takahashi, S. Kikuchi, H. Mikami, K. Ide, A. Binder","doi":"10.1109/ICELMACH.2012.6349854","DOIUrl":"https://doi.org/10.1109/ICELMACH.2012.6349854","url":null,"abstract":"In order to boost up the calculation precision of d-q space vector analysis, new approach for estimating parameters of line-starting permanent magnet motors is developed. Introducing leakage-flux and magnetizing-flux variations dependant on not only stator excitation but also rotor one, transient characteristics and steady-state performance are calculated. Thorough the comparison with finite element analysis, the validity of the proposed method is verified. Especially, it is notable that it can provide at short times accurate quasi-steady-state average torque and precise critical load torque for self-starting.","PeriodicalId":6309,"journal":{"name":"2012 XXth International Conference on Electrical Machines","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72742992","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 : 2012-11-12DOI: 10.1109/ICELMACH.2012.6350279
Y. Boutora, R. Ibtiouen, N. Takorabet
An analytical model of slotless PM motor with segmented magnets is presented. The Ampere's approach is adopted for the modeling of permanent magnets and separation variables method is used to calculate magnetic field in all magnetic air-gap of the motor. The model considers parallel magnetized magnet segments by the introduction of volume current densities inside the magnet regions as well as surface currents on their boundaries. A finite element package is used to validate the proposed model.
{"title":"Analytical model of parallel magnetized magnet segments of surface PM slotless machine","authors":"Y. Boutora, R. Ibtiouen, N. Takorabet","doi":"10.1109/ICELMACH.2012.6350279","DOIUrl":"https://doi.org/10.1109/ICELMACH.2012.6350279","url":null,"abstract":"An analytical model of slotless PM motor with segmented magnets is presented. The Ampere's approach is adopted for the modeling of permanent magnets and separation variables method is used to calculate magnetic field in all magnetic air-gap of the motor. The model considers parallel magnetized magnet segments by the introduction of volume current densities inside the magnet regions as well as surface currents on their boundaries. A finite element package is used to validate the proposed model.","PeriodicalId":6309,"journal":{"name":"2012 XXth International Conference on Electrical Machines","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73331073","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 : 2012-11-12DOI: 10.1109/ICELMACH.2012.6350209
S. Cabral, A. Nunes, M. Januario, G. Farina
This work presents the performance of the well-known program ATP-Alternative Transient Program applied to the simulation of continuous windings of transformer under the incidence of a voltage surge. The motivation for this analysis lies in the fact that once ATP is widely applied for circuit simulation in several conditions, it is expected that it can also be applicable to this problem that is of significant importance for transformer designer. If so, thanks to wide ATP availability designers will have available an easy and user friendly tool for helping in their designs. Basis of analysis is in new experimental data obtained by the authors as well as some other data presented in previously published paper, in which experimental data have also validated applicability of the TLM- Transmission Line Modeling Method for the same problem, known as a classical one for concerns of voltage insulation for transformer designers.
{"title":"Modeling continuous windings under transients with TLM and ATP","authors":"S. Cabral, A. Nunes, M. Januario, G. Farina","doi":"10.1109/ICELMACH.2012.6350209","DOIUrl":"https://doi.org/10.1109/ICELMACH.2012.6350209","url":null,"abstract":"This work presents the performance of the well-known program ATP-Alternative Transient Program applied to the simulation of continuous windings of transformer under the incidence of a voltage surge. The motivation for this analysis lies in the fact that once ATP is widely applied for circuit simulation in several conditions, it is expected that it can also be applicable to this problem that is of significant importance for transformer designer. If so, thanks to wide ATP availability designers will have available an easy and user friendly tool for helping in their designs. Basis of analysis is in new experimental data obtained by the authors as well as some other data presented in previously published paper, in which experimental data have also validated applicability of the TLM- Transmission Line Modeling Method for the same problem, known as a classical one for concerns of voltage insulation for transformer designers.","PeriodicalId":6309,"journal":{"name":"2012 XXth International Conference on Electrical Machines","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84460798","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 : 2012-11-12DOI: 10.1109/ICELMACH.2012.6350056
A. Tessarolo, M. Bortolozzi, M. Mezzarobba
One of the issues in the design of surface permanent magnet machines is the prediction of rotor eddy current losses due to space harmonics in the armature reaction field. In performing this calculation, it is a common practice to apply the superposition principle, i.e. the power loss due to each single armature reaction field harmonic is computed and then the single loss contributions are summed to find the total losses. Such method would be correct if all stator harmonics produced rotor eddy currents with different frequency, but this is not generally the case. This paper investigates if and under what conditions the harmonic superposition principle can be applied without causing calculation errors. The investigation is extended to different kind of permanent-magnet machines, including surface-mounted, Halback and interior permanent magnet rotor topologies.
{"title":"On the validity of the harmonic superposition principle for computing rotor eddy current losses in permanent magnet machines","authors":"A. Tessarolo, M. Bortolozzi, M. Mezzarobba","doi":"10.1109/ICELMACH.2012.6350056","DOIUrl":"https://doi.org/10.1109/ICELMACH.2012.6350056","url":null,"abstract":"One of the issues in the design of surface permanent magnet machines is the prediction of rotor eddy current losses due to space harmonics in the armature reaction field. In performing this calculation, it is a common practice to apply the superposition principle, i.e. the power loss due to each single armature reaction field harmonic is computed and then the single loss contributions are summed to find the total losses. Such method would be correct if all stator harmonics produced rotor eddy currents with different frequency, but this is not generally the case. This paper investigates if and under what conditions the harmonic superposition principle can be applied without causing calculation errors. The investigation is extended to different kind of permanent-magnet machines, including surface-mounted, Halback and interior permanent magnet rotor topologies.","PeriodicalId":6309,"journal":{"name":"2012 XXth International Conference on Electrical Machines","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84559136","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 : 2012-11-12DOI: 10.1109/ICELMACH.2012.6350248
J. Gieras
A brief review of permanent magnet (PM) synchronous generators with hybrid field excitation systems and output voltage regulation capabilities has been presented. Both series and parallel hybrid field excitation systems have been discussed. The review emphasizes the construction, advantages, drawbacks and basic characteristics of PM synchronous generators with additional field excitation winding placed either on the stator or rotor.
{"title":"PM synchronous generators with hybrid excitation systems and voltage control Capabilities: A review","authors":"J. Gieras","doi":"10.1109/ICELMACH.2012.6350248","DOIUrl":"https://doi.org/10.1109/ICELMACH.2012.6350248","url":null,"abstract":"A brief review of permanent magnet (PM) synchronous generators with hybrid field excitation systems and output voltage regulation capabilities has been presented. Both series and parallel hybrid field excitation systems have been discussed. The review emphasizes the construction, advantages, drawbacks and basic characteristics of PM synchronous generators with additional field excitation winding placed either on the stator or rotor.","PeriodicalId":6309,"journal":{"name":"2012 XXth International Conference on Electrical Machines","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84777325","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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