Pub Date : 2008-09-01DOI: 10.1109/ICELMACH.2008.4799904
C. A. Cezario, A.A.M. Oliveira
This work presents the development of a CFD methodology to evaluate the distribution of the airflow around the end winding of an asynchronous motor. This process was assisted by an experimental device that was designed and developed in order to consider a number of geometric simplifications aiming at the validation of the CFD model. The problems of numerical convergence in both steady-state and transient regimes are discussed in this work.
{"title":"Electric motor internal fan system CFD validation","authors":"C. A. Cezario, A.A.M. Oliveira","doi":"10.1109/ICELMACH.2008.4799904","DOIUrl":"https://doi.org/10.1109/ICELMACH.2008.4799904","url":null,"abstract":"This work presents the development of a CFD methodology to evaluate the distribution of the airflow around the end winding of an asynchronous motor. This process was assisted by an experimental device that was designed and developed in order to consider a number of geometric simplifications aiming at the validation of the CFD model. The problems of numerical convergence in both steady-state and transient regimes are discussed in this work.","PeriodicalId":416125,"journal":{"name":"2008 18th International Conference on Electrical Machines","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131203167","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 : 2008-09-01DOI: 10.1109/ICELMACH.2008.4799987
I. Tsoumas, G. Georgoulas, A. Safacas, G. Vachtsevanos
This paper investigates a novel approach for rotor fault diagnosis in asynchronous machines. Empirical mode decomposition (EMD) is applied to the measured start-up current. More specifically, the space vector of the stator start-up current is decomposed into complex intrinsic mode functions (IMFs) in order to analyze the asynchronous machine's transient. It is shown that in the case of rotor fault a particular IMF arises which characterizes the presence of the fault. The instantaneous frequency and the amplitude of the IMF can be used for an efficient fault diagnosis.
{"title":"Empirical Mode Decomposition of the stator start-up current for rotor fault diagnosis in asynchronous machines","authors":"I. Tsoumas, G. Georgoulas, A. Safacas, G. Vachtsevanos","doi":"10.1109/ICELMACH.2008.4799987","DOIUrl":"https://doi.org/10.1109/ICELMACH.2008.4799987","url":null,"abstract":"This paper investigates a novel approach for rotor fault diagnosis in asynchronous machines. Empirical mode decomposition (EMD) is applied to the measured start-up current. More specifically, the space vector of the stator start-up current is decomposed into complex intrinsic mode functions (IMFs) in order to analyze the asynchronous machine's transient. It is shown that in the case of rotor fault a particular IMF arises which characterizes the presence of the fault. The instantaneous frequency and the amplitude of the IMF can be used for an efficient fault diagnosis.","PeriodicalId":416125,"journal":{"name":"2008 18th International Conference on Electrical Machines","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127616737","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 : 2008-09-01DOI: 10.1109/ICELMACH.2008.4800130
B. Vaseghi, N. Takorabet, F. Meibody-Tabar
In this paper a simple dynamic model for induction machines (IM) with inter-turn winding fault is established. Finite element method is used for parameter identification of the machine under fault condition. The proposed dynamic model is validated by time stepping finite element (FE) analysis. The dynamic model results exhibit the same trend as predicted by FE analysis for different fault insulation resistances. This model is well adapted for IM health monitoring and inter-turn fault diagnosis.
{"title":"Modeling of IM with stator winding inter-turn fault validated by FEM","authors":"B. Vaseghi, N. Takorabet, F. Meibody-Tabar","doi":"10.1109/ICELMACH.2008.4800130","DOIUrl":"https://doi.org/10.1109/ICELMACH.2008.4800130","url":null,"abstract":"In this paper a simple dynamic model for induction machines (IM) with inter-turn winding fault is established. Finite element method is used for parameter identification of the machine under fault condition. The proposed dynamic model is validated by time stepping finite element (FE) analysis. The dynamic model results exhibit the same trend as predicted by FE analysis for different fault insulation resistances. This model is well adapted for IM health monitoring and inter-turn fault diagnosis.","PeriodicalId":416125,"journal":{"name":"2008 18th International Conference on Electrical Machines","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127655143","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 : 2008-09-01DOI: 10.1109/ICELMACH.2008.4800241
A. Reinap, M. Alakula, G. Lindstedt, B. Thuresson, T. Cedell, M. Andersson, P. Jeppsson
This paper focuses on the design and the evaluation of a single-phase claw-pole machine that is integrated into a fan drive. The inner stator of the machine is manufactured by using a rotational moulding technology, which allows a high integrability when using plastic matrix Soft Magnetic Mouldable Composite - SM2C. The goal of the design is to develop a fan integrated drive where the major advantage is the inexpensive production method. The development of a control strategy and the respective control circuitry is part of the design process.
{"title":"An integrated design of a machine with soft magnetic mouldable composite","authors":"A. Reinap, M. Alakula, G. Lindstedt, B. Thuresson, T. Cedell, M. Andersson, P. Jeppsson","doi":"10.1109/ICELMACH.2008.4800241","DOIUrl":"https://doi.org/10.1109/ICELMACH.2008.4800241","url":null,"abstract":"This paper focuses on the design and the evaluation of a single-phase claw-pole machine that is integrated into a fan drive. The inner stator of the machine is manufactured by using a rotational moulding technology, which allows a high integrability when using plastic matrix Soft Magnetic Mouldable Composite - SM2C. The goal of the design is to develop a fan integrated drive where the major advantage is the inexpensive production method. The development of a control strategy and the respective control circuitry is part of the design process.","PeriodicalId":416125,"journal":{"name":"2008 18th International Conference on Electrical Machines","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127416914","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 : 2008-09-01DOI: 10.1109/ICELMACH.2008.4800226
K. Okuda, K. Saneyoshi
In this paper, the simulation result concerning the relation between the electrode thickness and the spring characteristic of a new stacked-type electrostatic actuator has been described. This actuator is constructed by alternately folding two insulated thin metal films, and the electrode parts are thickened to make easily not to expand when the load is applied to this actuator. In a numerical simulation, three-dimensional nonlinear structural analysis including the contact problem has been studied using the finite element method. In the result, it has been understood that the expansion of the actuator is in inverse proportion to about the second power of the electrode thickness. However, when the lengths of the hinge parts are long, the actuator becomes to expand easily even if the electrode parts are thick.
{"title":"Simulation of relation between electrode thickness and spring characteristic of a new stacked-type electrostatic actuator","authors":"K. Okuda, K. Saneyoshi","doi":"10.1109/ICELMACH.2008.4800226","DOIUrl":"https://doi.org/10.1109/ICELMACH.2008.4800226","url":null,"abstract":"In this paper, the simulation result concerning the relation between the electrode thickness and the spring characteristic of a new stacked-type electrostatic actuator has been described. This actuator is constructed by alternately folding two insulated thin metal films, and the electrode parts are thickened to make easily not to expand when the load is applied to this actuator. In a numerical simulation, three-dimensional nonlinear structural analysis including the contact problem has been studied using the finite element method. In the result, it has been understood that the expansion of the actuator is in inverse proportion to about the second power of the electrode thickness. However, when the lengths of the hinge parts are long, the actuator becomes to expand easily even if the electrode parts are thick.","PeriodicalId":416125,"journal":{"name":"2008 18th International Conference on Electrical Machines","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115474718","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 : 2008-09-01DOI: 10.1109/ICELMACH.2008.4800231
V. Fireteanu, P. Taras
This paper refers to the teaching of electromagnetic structure of induction machine, of steady state characteristics and of dynamic and transient machine behaviors based on finite element models and analysis of simulation results. Magnetoharmonic and transient models are used to solve field-circuit, respectively field-circuit-rotating motion problems.
{"title":"Teaching induction machine through finite element models","authors":"V. Fireteanu, P. Taras","doi":"10.1109/ICELMACH.2008.4800231","DOIUrl":"https://doi.org/10.1109/ICELMACH.2008.4800231","url":null,"abstract":"This paper refers to the teaching of electromagnetic structure of induction machine, of steady state characteristics and of dynamic and transient machine behaviors based on finite element models and analysis of simulation results. Magnetoharmonic and transient models are used to solve field-circuit, respectively field-circuit-rotating motion problems.","PeriodicalId":416125,"journal":{"name":"2008 18th International Conference on Electrical Machines","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124267231","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 : 2008-09-01DOI: 10.1109/ICELMACH.2008.4800239
N. Dehlinger, M. Dubois
The use of an hybrid stator, made of a combination of Fe-Si laminations and soft magnetic materials (SMC), has been recently proposed to reduce the iron losses occurring in a clawpole transverse flux machine (CTFM). In this paper, we show that a very low-loss magnetic material, the amorphous material, can be easily used as a substitution to the Fe-Si laminations to reduce the losses further. The stator iron losses in a CTFM with amorphous cores are compared to those occurring in a CTFM with Fe-Si cores by experimental tests and finite element simulations. It is found that the use of amorphous cores could increase the machine efficiency and speed range.
{"title":"Clawpole Transverse Flux Machines with amorphous stator cores","authors":"N. Dehlinger, M. Dubois","doi":"10.1109/ICELMACH.2008.4800239","DOIUrl":"https://doi.org/10.1109/ICELMACH.2008.4800239","url":null,"abstract":"The use of an hybrid stator, made of a combination of Fe-Si laminations and soft magnetic materials (SMC), has been recently proposed to reduce the iron losses occurring in a clawpole transverse flux machine (CTFM). In this paper, we show that a very low-loss magnetic material, the amorphous material, can be easily used as a substitution to the Fe-Si laminations to reduce the losses further. The stator iron losses in a CTFM with amorphous cores are compared to those occurring in a CTFM with Fe-Si cores by experimental tests and finite element simulations. It is found that the use of amorphous cores could increase the machine efficiency and speed range.","PeriodicalId":416125,"journal":{"name":"2008 18th International Conference on Electrical Machines","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114863854","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 : 2008-09-01DOI: 10.1109/ICELMACH.2008.4800033
Elie Al-Ahmar, Mohamed Benbouzid, Yassine Amirat, S. Benelghali
This paper deals with the investigation of a specific transient technique suitable for electrical and mechanical fault diagnosis in a DFIG-based wind turbine. The investigated technique is a combination of the discrete wavelet transform, statistics and the energy. Experimental investigations carried out on a 1.1-kW induction generator based test bench show that the proposed technique can unambiguously diagnose faults under transient conditions.
{"title":"DFIG-based wind turbine fault diagnosis using a specific discrete wavelet transform","authors":"Elie Al-Ahmar, Mohamed Benbouzid, Yassine Amirat, S. Benelghali","doi":"10.1109/ICELMACH.2008.4800033","DOIUrl":"https://doi.org/10.1109/ICELMACH.2008.4800033","url":null,"abstract":"This paper deals with the investigation of a specific transient technique suitable for electrical and mechanical fault diagnosis in a DFIG-based wind turbine. The investigated technique is a combination of the discrete wavelet transform, statistics and the energy. Experimental investigations carried out on a 1.1-kW induction generator based test bench show that the proposed technique can unambiguously diagnose faults under transient conditions.","PeriodicalId":416125,"journal":{"name":"2008 18th International Conference on Electrical Machines","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114522452","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 : 2008-09-01DOI: 10.1109/ICELMACH.2008.4800003
J. Amorós, P. Andrada, L. Massagués, P. Iñiguez
This paper studies the sensitivity of several geometrical parameters on the performance of a linear switched reluctance motor (LSRM). The analysis is made in two dimensions using the finite element method. The study shows the strong influence of the width of the stator pole (bp) and the width of the moving pole or translator pole (bs) on inductance and force profiles. The results of this study could be a useful tool for optimizing the geometry of a LSRM.
{"title":"Sensitivity analysis of several geometrical parameters on linear switched reluctance motor performance","authors":"J. Amorós, P. Andrada, L. Massagués, P. Iñiguez","doi":"10.1109/ICELMACH.2008.4800003","DOIUrl":"https://doi.org/10.1109/ICELMACH.2008.4800003","url":null,"abstract":"This paper studies the sensitivity of several geometrical parameters on the performance of a linear switched reluctance motor (LSRM). The analysis is made in two dimensions using the finite element method. The study shows the strong influence of the width of the stator pole (bp) and the width of the moving pole or translator pole (bs) on inductance and force profiles. The results of this study could be a useful tool for optimizing the geometry of a LSRM.","PeriodicalId":416125,"journal":{"name":"2008 18th International Conference on Electrical Machines","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114557164","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 : 2008-09-01DOI: 10.1109/ICELMACH.2008.4799848
E. Mukai, A. Tada
A magnetic shielding type superconducting fault current limiter (MSFCL) has undesirable leakage impedance and thus the voltage drop relating to the leakage impedance occurs in the steady-state operation (the standby condition of a fault). Therefore, this paper proposes a divided MSFCL model to reduce the value of the leakage impedance in the steady-state operation. The four-divided model of MSFCL was actually constructed. Then experiments were carried out to demonstrate the advantage of the divided model. Moreover, the divided model was compared with a non-divided model with the same turns of the coils. We confirmed the advantage of the divided model through these experiments.
{"title":"Study on reduction of steady-state impedance in magnetic shielding type superconducting fault current limiter","authors":"E. Mukai, A. Tada","doi":"10.1109/ICELMACH.2008.4799848","DOIUrl":"https://doi.org/10.1109/ICELMACH.2008.4799848","url":null,"abstract":"A magnetic shielding type superconducting fault current limiter (MSFCL) has undesirable leakage impedance and thus the voltage drop relating to the leakage impedance occurs in the steady-state operation (the standby condition of a fault). Therefore, this paper proposes a divided MSFCL model to reduce the value of the leakage impedance in the steady-state operation. The four-divided model of MSFCL was actually constructed. Then experiments were carried out to demonstrate the advantage of the divided model. Moreover, the divided model was compared with a non-divided model with the same turns of the coils. We confirmed the advantage of the divided model through these experiments.","PeriodicalId":416125,"journal":{"name":"2008 18th International Conference on Electrical Machines","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114706965","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：