Pub Date : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960178
G. Verez, G. Barakat, Y. Amara, O. Bennouna, G. Hoblos
Flux-Switching machines (FSM) have been gaining attention during the last decade. Their electromagnetic behavior has been extensively studied for various topologies, i.e. U-core and E-core, simple (wound field or PM) and hybrid excitations FSM machines. Even though noise and vibrations of electromagnetic origins can be important drawbacks, depending on the application, only few studies are analyzing these aspects. As a result, this paper aims at understanding the sound power level of U-core flux-switching permanent magnet (FSPM) machines whose rotors have different number of poles. The stator of the extensively studied 12/10 stator/rotor pole FSPM machine (12s10rp) serves as a basis for investigating 12s11rp, 12s13rp and 12s14rp configurations. Electromagnetic pressure is calculated from the Maxwell stress tensor where the magnetic flux density is obtained with 2-D finite element analysis (FEA). It then serves as input of a mechanical and acoustical 3-D FEA model of the stator with carter.
{"title":"Impact of pole and slot combination on noise and vibrations of flux-switching PM machines","authors":"G. Verez, G. Barakat, Y. Amara, O. Bennouna, G. Hoblos","doi":"10.1109/ICELMACH.2014.6960178","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960178","url":null,"abstract":"Flux-Switching machines (FSM) have been gaining attention during the last decade. Their electromagnetic behavior has been extensively studied for various topologies, i.e. U-core and E-core, simple (wound field or PM) and hybrid excitations FSM machines. Even though noise and vibrations of electromagnetic origins can be important drawbacks, depending on the application, only few studies are analyzing these aspects. As a result, this paper aims at understanding the sound power level of U-core flux-switching permanent magnet (FSPM) machines whose rotors have different number of poles. The stator of the extensively studied 12/10 stator/rotor pole FSPM machine (12s10rp) serves as a basis for investigating 12s11rp, 12s13rp and 12s14rp configurations. Electromagnetic pressure is calculated from the Maxwell stress tensor where the magnetic flux density is obtained with 2-D finite element analysis (FEA). It then serves as input of a mechanical and acoustical 3-D FEA model of the stator with carter.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127541779","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 : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960246
F. Schuller, N. Parspour, Lei Chen
This paper outlines a position control system for a two phase linear permanent magnet excited transverse flux machine. A force ripple minimization technique is implemented by an inverse force-current look-up table and a subordinate current controller. The superordinate speed and position control enables positioning tasks. The control system is implemented on a rapid prototyping system and is tested on a prototype of a linear transverse flux machine. The aim is implementing a simple control structure, respecting the machine's electro-magnetic-mechanical behavior at the same time.
{"title":"Position control of a linear transverse flux machine with subordinate current control","authors":"F. Schuller, N. Parspour, Lei Chen","doi":"10.1109/ICELMACH.2014.6960246","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960246","url":null,"abstract":"This paper outlines a position control system for a two phase linear permanent magnet excited transverse flux machine. A force ripple minimization technique is implemented by an inverse force-current look-up table and a subordinate current controller. The superordinate speed and position control enables positioning tasks. The control system is implemented on a rapid prototyping system and is tested on a prototype of a linear transverse flux machine. The aim is implementing a simple control structure, respecting the machine's electro-magnetic-mechanical behavior at the same time.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122193367","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 : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960458
S. Spas, G. Dajaku, D. Gerling
This paper presents a comparison of two inlet permanent magnet synchronous machines with concentrated windings. A novel 24-teeth/28-poles machine design with flux barriers in the stator teeth is compared to a common 30-teeth/20-poles design, which is widely used for hybrid electric vehicle (HEV) applications. Detailed comparison of important machine characteristics such as torque ripple, iron losses, eddy current losses in the magnets, axial length and machine weight is presented. According to the study, the novel 24-teeth/28-poles machine design offers a high saving potential concerning the space requirement and production costs. At the same time this machine topology generates a smoother torque compared to the 30-teeth/20-poles topology.
{"title":"Comparison of PM machines with concentrated windings for automotive application","authors":"S. Spas, G. Dajaku, D. Gerling","doi":"10.1109/ICELMACH.2014.6960458","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960458","url":null,"abstract":"This paper presents a comparison of two inlet permanent magnet synchronous machines with concentrated windings. A novel 24-teeth/28-poles machine design with flux barriers in the stator teeth is compared to a common 30-teeth/20-poles design, which is widely used for hybrid electric vehicle (HEV) applications. Detailed comparison of important machine characteristics such as torque ripple, iron losses, eddy current losses in the magnets, axial length and machine weight is presented. According to the study, the novel 24-teeth/28-poles machine design offers a high saving potential concerning the space requirement and production costs. At the same time this machine topology generates a smoother torque compared to the 30-teeth/20-poles topology.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116561661","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 : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960543
M. Novak, J. Novak, M. Schmirler
This paper presents the theoretical background and experimental results obtained during the development of a small combined heat and power unit. The unit's final output power when the development is finished should be 3kW of electrical power. The unit was built with an automotive turbocharger acting as a turbine and a high-speed permanent magnet synchronous machine. The achieved parameters so far are 550 W of DC power for 11 000 RPM. The power was converted to AC with a commercial active-front end unit into the 3×400 V, 50 Hz AC power network. Due to mechanical constrains the generator was running only with about ¼ of the final RPM (42000 RPM) and with about ½ of the nominal current (11 A); the 3 kW goal is achievable.
{"title":"Combined-heat and power generator with high-speed permanent magnet synchronous machine","authors":"M. Novak, J. Novak, M. Schmirler","doi":"10.1109/ICELMACH.2014.6960543","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960543","url":null,"abstract":"This paper presents the theoretical background and experimental results obtained during the development of a small combined heat and power unit. The unit's final output power when the development is finished should be 3kW of electrical power. The unit was built with an automotive turbocharger acting as a turbine and a high-speed permanent magnet synchronous machine. The achieved parameters so far are 550 W of DC power for 11 000 RPM. The power was converted to AC with a commercial active-front end unit into the 3×400 V, 50 Hz AC power network. Due to mechanical constrains the generator was running only with about ¼ of the final RPM (42000 RPM) and with about ½ of the nominal current (11 A); the 3 kW goal is achievable.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117218647","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 : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960291
A. Hodder, T. Maendly, B. Kawkabani
The present paper addresses the speed control of a DC machine in the context of an advanced teaching lab consisting in setting up an islanded production unit. The different steps followed by the student to design and implement the speed control of the DC machine used in this islanded production unit are explained. A hardware specifically designed for this teaching and consisting of a DSP and an Analog to Digital (A/D) converter is presented. The major steps for the design of the PI (Proportional-Integral) regulator are recalled, whereas different improvement techniques such as the Anti-Reset Windup (ARW) or the set value corrector are presented in details. The corresponding code implemented in a DSP is given and detailed. Different tests performed on the test bench are then discussed mainly in terms of response time and overshoot.
{"title":"Teaching lab on the DSP implementation of the speed control of a DC machine","authors":"A. Hodder, T. Maendly, B. Kawkabani","doi":"10.1109/ICELMACH.2014.6960291","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960291","url":null,"abstract":"The present paper addresses the speed control of a DC machine in the context of an advanced teaching lab consisting in setting up an islanded production unit. The different steps followed by the student to design and implement the speed control of the DC machine used in this islanded production unit are explained. A hardware specifically designed for this teaching and consisting of a DSP and an Analog to Digital (A/D) converter is presented. The major steps for the design of the PI (Proportional-Integral) regulator are recalled, whereas different improvement techniques such as the Anti-Reset Windup (ARW) or the set value corrector are presented in details. The corresponding code implemented in a DSP is given and detailed. Different tests performed on the test bench are then discussed mainly in terms of response time and overshoot.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131037316","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 : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960359
P. Sergeant, H. Vansompel, L. Dupré
For yokeless and segmented armature (YASA) axial flux permanent-magnet machines, several lamination stacking methods are discussed. For the same global machine geometry, it is shown that some are easier and cheaper to produce, while others have a higher output torque, lower cogging torque, better efficiency or higher power density. Apart from the different lamination stack geometries, also different magnet geometries are studied. By evaluating the different combinations of lamination stacking methods and magnet shapes, it is shown that some combinations suffer from local saturation, lower output torque and higher losses. The simulations are performed by a multilayer 2D and a simplified 3D finite element model. To prove the validity of the proposed model, simulated results are verified with measurements on a prototype machine.
{"title":"Performance and implementation issues considering the use of thin laminated steel sheets in segmented armature axial-flux PM machines","authors":"P. Sergeant, H. Vansompel, L. Dupré","doi":"10.1109/ICELMACH.2014.6960359","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960359","url":null,"abstract":"For yokeless and segmented armature (YASA) axial flux permanent-magnet machines, several lamination stacking methods are discussed. For the same global machine geometry, it is shown that some are easier and cheaper to produce, while others have a higher output torque, lower cogging torque, better efficiency or higher power density. Apart from the different lamination stack geometries, also different magnet geometries are studied. By evaluating the different combinations of lamination stacking methods and magnet shapes, it is shown that some combinations suffer from local saturation, lower output torque and higher losses. The simulations are performed by a multilayer 2D and a simplified 3D finite element model. To prove the validity of the proposed model, simulated results are verified with measurements on a prototype machine.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131069708","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 : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960435
R. Romero-Troncoso, D. Morinigo-Sotelo, Ó. Duque-Pérez, R. Osornio-Rios, M. Ibarra-Manzano, A. García-Perez
The fault detection in an induction motor (IM) operated by a variable speed drive (VSD) is an actual industrial need as most of the line-fed machines are replaced by a VSD, due to their improved speed regulation and fast dynamic response. However, undesired harmonics are always present when the IM is fed through a VSD. Under this operating condition, most developed techniques are unable to detect faults in the IM. This paper presents a technique based on the multiple signal classification (MUSIC) method, and it is applied to a VSD-fed IM during the startup transient; in order to verify the capability of the method to identify one broken rotor bar. From the experimental results, the proposed method is proven to be sensitive enough to detect one broken rotor bar, enabling a reliable diagnosis under different fundamental supply frequencies and load conditions.
{"title":"Broken rotor bar detection in VSD-fed induction motors at startup by high-resolution spectral analysis","authors":"R. Romero-Troncoso, D. Morinigo-Sotelo, Ó. Duque-Pérez, R. Osornio-Rios, M. Ibarra-Manzano, A. García-Perez","doi":"10.1109/ICELMACH.2014.6960435","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960435","url":null,"abstract":"The fault detection in an induction motor (IM) operated by a variable speed drive (VSD) is an actual industrial need as most of the line-fed machines are replaced by a VSD, due to their improved speed regulation and fast dynamic response. However, undesired harmonics are always present when the IM is fed through a VSD. Under this operating condition, most developed techniques are unable to detect faults in the IM. This paper presents a technique based on the multiple signal classification (MUSIC) method, and it is applied to a VSD-fed IM during the startup transient; in order to verify the capability of the method to identify one broken rotor bar. From the experimental results, the proposed method is proven to be sensitive enough to detect one broken rotor bar, enabling a reliable diagnosis under different fundamental supply frequencies and load conditions.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128180337","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 : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960384
M. Mohr, O. Bíró, F. Diwoky
This paper presents a finite element based circuit model approach for a permanent magnet synchronous machine considering rotor eccentricity effects. The presented model is well suited for multi body dynamics simulations, because it combines the coverage of saturation, slotting and eccentricity effects that is typically known from finite element models with a very low simulation cost. The focus of this work is on the validation of the proposed model. For this purpose several comparisons between the proposed model and transient finite element simulations with motion have been carried out.
{"title":"Consideration of rotor eccentricity effects in a multi body dynamics simulation using a finite element based circuit model approach","authors":"M. Mohr, O. Bíró, F. Diwoky","doi":"10.1109/ICELMACH.2014.6960384","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960384","url":null,"abstract":"This paper presents a finite element based circuit model approach for a permanent magnet synchronous machine considering rotor eccentricity effects. The presented model is well suited for multi body dynamics simulations, because it combines the coverage of saturation, slotting and eccentricity effects that is typically known from finite element models with a very low simulation cost. The focus of this work is on the validation of the proposed model. For this purpose several comparisons between the proposed model and transient finite element simulations with motion have been carried out.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134640186","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 : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960436
Andrew S. Babel, E. Strangas
A comprehensive diagnostic and prognostic method is introduced for assessing the condition of stator winding insulation and predicting its failure time. A diagnostic method is developed by building an analytical model of the stator winding. Degradation is simulated by altering the permittivity and conductivity of the insulation in a finite element model simulation and changing the analytical model accordingly. The diagnostic method is performed with an oscilloscope and other common hardware. A prognostic method is introduced which is used to predict the remaining useful life of the insulation based on fitting insulation current measurements to an exponential decay model. The diagnostic method is verified with the analytical model for multiple levels of degradation and experimentally for the healthy case. The prognostic method is verified with simulated degradation data.
{"title":"Condition-based monitoring and prognostic health management of electric machine stator winding insulation","authors":"Andrew S. Babel, E. Strangas","doi":"10.1109/ICELMACH.2014.6960436","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960436","url":null,"abstract":"A comprehensive diagnostic and prognostic method is introduced for assessing the condition of stator winding insulation and predicting its failure time. A diagnostic method is developed by building an analytical model of the stator winding. Degradation is simulated by altering the permittivity and conductivity of the insulation in a finite element model simulation and changing the analytical model accordingly. The diagnostic method is performed with an oscilloscope and other common hardware. A prognostic method is introduced which is used to predict the remaining useful life of the insulation based on fitting insulation current measurements to an exponential decay model. The diagnostic method is verified with the analytical model for multiple levels of degradation and experimentally for the healthy case. The prognostic method is verified with simulated degradation data.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132091528","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 : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960438
D. A. Asfani, H. Z. Mubarok, Arif Musthofa, I. M. Yulistya Negara
On-line monitoring system is one of the solutions to avoid catastrophic failure in machine, including induction motor. The most common fault in induction motor is stator winding failures that initiated by inter-turn short circuit. In this paper, induction motor monitoring and fault detection system is proposed based on microcontroller which is displayed on computer monitor. Several measurement variables are displayed in on-line monitoring interface such as voltage, current, speed, and stator temperature. Moreover, the diagnostic system is developed to detect inter-turn short circuit. Based on the testing result, the proposed system is successfully to detect one-turn short circuit fault or less than one percent of stator winding.
{"title":"Design on-line monitoring and sensitive fault detection for three phase induction motor","authors":"D. A. Asfani, H. Z. Mubarok, Arif Musthofa, I. M. Yulistya Negara","doi":"10.1109/ICELMACH.2014.6960438","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960438","url":null,"abstract":"On-line monitoring system is one of the solutions to avoid catastrophic failure in machine, including induction motor. The most common fault in induction motor is stator winding failures that initiated by inter-turn short circuit. In this paper, induction motor monitoring and fault detection system is proposed based on microcontroller which is displayed on computer monitor. Several measurement variables are displayed in on-line monitoring interface such as voltage, current, speed, and stator temperature. Moreover, the diagnostic system is developed to detect inter-turn short circuit. Based on the testing result, the proposed system is successfully to detect one-turn short circuit fault or less than one percent of stator winding.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"38 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114045082","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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