Pub Date : 2015-05-10DOI: 10.1109/IEMDC.2015.7409286
M. Cosovic, S. Smaka
The design method of initial topology of interior permanent magnet synchronous machine (IPMSM) for hybrid electric vehicle (HEV) propulsion is described in this paper. Design constraints are selected on the basis of limitations imposed by machine's manufacturer and application (e.g. maximum copper slot fill factor, air gap length, permanent magnet material, limited space available in drive trains, etc.). Design variables are rotor radius, stator slot width and number of turns per phase winding. Parametric analysis is performed for various machine topologies. The cost function, which connects the distribution of operating points of HEV and the efficiency maps of various topologies of an electrical machine, is defined. Obtained parametric results are compared to find the result leading to the extreme value of the cost function. The initial design of IPMSM that corresponds to this result is considered as the best initial design.
{"title":"Design of initial topology of interior permanent magnet synchronous machine for hybrid electric vehicle","authors":"M. Cosovic, S. Smaka","doi":"10.1109/IEMDC.2015.7409286","DOIUrl":"https://doi.org/10.1109/IEMDC.2015.7409286","url":null,"abstract":"The design method of initial topology of interior permanent magnet synchronous machine (IPMSM) for hybrid electric vehicle (HEV) propulsion is described in this paper. Design constraints are selected on the basis of limitations imposed by machine's manufacturer and application (e.g. maximum copper slot fill factor, air gap length, permanent magnet material, limited space available in drive trains, etc.). Design variables are rotor radius, stator slot width and number of turns per phase winding. Parametric analysis is performed for various machine topologies. The cost function, which connects the distribution of operating points of HEV and the efficiency maps of various topologies of an electrical machine, is defined. Obtained parametric results are compared to find the result leading to the extreme value of the cost function. The initial design of IPMSM that corresponds to this result is considered as the best initial design.","PeriodicalId":6477,"journal":{"name":"2015 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"60 4","pages":"1658-1664"},"PeriodicalIF":0.0,"publicationDate":"2015-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91431633","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 : 2015-05-10DOI: 10.1109/IEMDC.2015.7409037
A. Oteafy, J. Chiasson, S. Ahmed-Zaid
This work presents an offline standstill identification technique, where the synchronous machine is locked at an arbitrary (but known) angle, and a test is conducted over a short period of time. In contrast to the well-known standard Standstill Frequency Response (SSFR) technique, which could take more than 6 hours to conduct, the method proposed here collects all the required data in few seconds. This technique is based on nonlinear least squares estimation and algebraic elimination theory. The resulting algorithm is non-iterative where the data is used to construct polynomials that are solved for a finite number of roots which determine the electrical parameter values. Experimental results are presented showing the efficacy of the technique in furnishing the parameters of a salient pole synchronous machine.
{"title":"A standstill parameter identification technique for the synchronous generator","authors":"A. Oteafy, J. Chiasson, S. Ahmed-Zaid","doi":"10.1109/IEMDC.2015.7409037","DOIUrl":"https://doi.org/10.1109/IEMDC.2015.7409037","url":null,"abstract":"This work presents an offline standstill identification technique, where the synchronous machine is locked at an arbitrary (but known) angle, and a test is conducted over a short period of time. In contrast to the well-known standard Standstill Frequency Response (SSFR) technique, which could take more than 6 hours to conduct, the method proposed here collects all the required data in few seconds. This technique is based on nonlinear least squares estimation and algebraic elimination theory. The resulting algorithm is non-iterative where the data is used to construct polynomials that are solved for a finite number of roots which determine the electrical parameter values. Experimental results are presented showing the efficacy of the technique in furnishing the parameters of a salient pole synchronous machine.","PeriodicalId":6477,"journal":{"name":"2015 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"36 1","pages":"60-65"},"PeriodicalIF":0.0,"publicationDate":"2015-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85058423","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 : 2015-05-10DOI: 10.1109/IEMDC.2015.7409081
E. Dlala, M. Solveson, S. Stanton, A. Arkkio
This paper presents an improved model for the prediction of core loss in numerical analysis of electromechanical devices. The model allows the coefficients of hysteresis and eddy current losses to vary with peak flux density and frequency based on physical observation of the loss dissipation. The coefficients are derived from the energy loss equation and extracted from specific power loss data typically provided by standard Epstein frame or single-sheet tests. The model was implemented in a 2-D finite-element code for the prediction of core losses in an induction motor where a close correlation between predicted and measured results was found.
{"title":"Improved model for the prediction of core loss in finite element analysis of electric machines","authors":"E. Dlala, M. Solveson, S. Stanton, A. Arkkio","doi":"10.1109/IEMDC.2015.7409081","DOIUrl":"https://doi.org/10.1109/IEMDC.2015.7409081","url":null,"abstract":"This paper presents an improved model for the prediction of core loss in numerical analysis of electromechanical devices. The model allows the coefficients of hysteresis and eddy current losses to vary with peak flux density and frequency based on physical observation of the loss dissipation. The coefficients are derived from the energy loss equation and extracted from specific power loss data typically provided by standard Epstein frame or single-sheet tests. The model was implemented in a 2-D finite-element code for the prediction of core losses in an induction motor where a close correlation between predicted and measured results was found.","PeriodicalId":6477,"journal":{"name":"2015 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"34 1","pages":"340-344"},"PeriodicalIF":0.0,"publicationDate":"2015-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82684722","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 : 2015-05-10DOI: 10.1109/IEMDC.2015.7409195
Tobias Huber, W. Peters, J. Bocker
In electric automotive traction drives an optimal utilization of the DC-bus voltage in the wide flux weakening range is crucial. At the same time a voltage margin is required to ensure the stability of the inner current control loop. An adequate trade-off between these conflicting objectives is obtained by employing a superimposed voltage controller that is activated during flux weakening operation. In this paper, the design of such a voltage controller is presented. A simplified voltage controller plant model is identified from step response measurements. Due to variations of the plant parameters, the voltage controller is designed as a gain-scheduling controller with sufficient robustness towards plant model inaccuracies. The performance of the voltage controller is demonstrated by test-bench measurements based on an electric traction motor typically employed in sub-compact electric vehicles.
{"title":"Voltage controller for flux weakening operation of interior permanent magnet synchronous motor in automotive traction applications","authors":"Tobias Huber, W. Peters, J. Bocker","doi":"10.1109/IEMDC.2015.7409195","DOIUrl":"https://doi.org/10.1109/IEMDC.2015.7409195","url":null,"abstract":"In electric automotive traction drives an optimal utilization of the DC-bus voltage in the wide flux weakening range is crucial. At the same time a voltage margin is required to ensure the stability of the inner current control loop. An adequate trade-off between these conflicting objectives is obtained by employing a superimposed voltage controller that is activated during flux weakening operation. In this paper, the design of such a voltage controller is presented. A simplified voltage controller plant model is identified from step response measurements. Due to variations of the plant parameters, the voltage controller is designed as a gain-scheduling controller with sufficient robustness towards plant model inaccuracies. The performance of the voltage controller is demonstrated by test-bench measurements based on an electric traction motor typically employed in sub-compact electric vehicles.","PeriodicalId":6477,"journal":{"name":"2015 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"8 1","pages":"1078-1083"},"PeriodicalIF":0.0,"publicationDate":"2015-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82133754","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 : 2015-05-10DOI: 10.1109/IEMDC.2015.7409074
M. Magill, P. Krein, K. Haran
Equivalent circuit parameter expressions have been derived to account for electronic pole changing in pole-phase modulation (PPM) induction machines. Conventional expressions require a fixed number of electrical phases, and winding pole count to be equal to magnetic pole count, both of which are not always satisfied in PPM machines. The proposed model can describe machines with an arbitrary number of electrical inputs and pole count configurations. Generalized parameter expressions allow for the examination of high-level design trade-offs associated with machine geometry, winding design, inverter leg count, and electronic pole count selection in variable speed applications. Finite element models and experiments are used to validate the analytical framework and verify parameter variation during electronic pole adjustment.
{"title":"Equivalent circuit model for pole-phase modulation induction machines","authors":"M. Magill, P. Krein, K. Haran","doi":"10.1109/IEMDC.2015.7409074","DOIUrl":"https://doi.org/10.1109/IEMDC.2015.7409074","url":null,"abstract":"Equivalent circuit parameter expressions have been derived to account for electronic pole changing in pole-phase modulation (PPM) induction machines. Conventional expressions require a fixed number of electrical phases, and winding pole count to be equal to magnetic pole count, both of which are not always satisfied in PPM machines. The proposed model can describe machines with an arbitrary number of electrical inputs and pole count configurations. Generalized parameter expressions allow for the examination of high-level design trade-offs associated with machine geometry, winding design, inverter leg count, and electronic pole count selection in variable speed applications. Finite element models and experiments are used to validate the analytical framework and verify parameter variation during electronic pole adjustment.","PeriodicalId":6477,"journal":{"name":"2015 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"52 1","pages":"293-299"},"PeriodicalIF":0.0,"publicationDate":"2015-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79858142","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 : 2015-05-10DOI: 10.1109/IEMDC.2015.7409178
Yichao Zhang, Wanjun Zhang, T. Jahns
This paper investigates the single-switch short-circuit fault response of a permanent magnet (PM) machine drive using a current source inverter (CSI). The CSI offers some appealing advantages over conventional voltage-source inverters (VSIs) during short-circuit fault conditions originating inside the inverter. Two post-fault strategies are investigated in this paper, consisting of either: 1) turning off all of the switches; or 2) turning on all of the switches in a controlled manner. Key features associated with the machine response to both of these post-fault strategies are presented and compared, leading to the conclusion that both make it possible to protect the machine. A combination of analysis, simulation, and experimental tests has been adopted for carrying out this investigation.
{"title":"Investigation of single-switch short-circuit fault characteristics of a PM machine drive with a current source inverter","authors":"Yichao Zhang, Wanjun Zhang, T. Jahns","doi":"10.1109/IEMDC.2015.7409178","DOIUrl":"https://doi.org/10.1109/IEMDC.2015.7409178","url":null,"abstract":"This paper investigates the single-switch short-circuit fault response of a permanent magnet (PM) machine drive using a current source inverter (CSI). The CSI offers some appealing advantages over conventional voltage-source inverters (VSIs) during short-circuit fault conditions originating inside the inverter. Two post-fault strategies are investigated in this paper, consisting of either: 1) turning off all of the switches; or 2) turning on all of the switches in a controlled manner. Key features associated with the machine response to both of these post-fault strategies are presented and compared, leading to the conclusion that both make it possible to protect the machine. A combination of analysis, simulation, and experimental tests has been adopted for carrying out this investigation.","PeriodicalId":6477,"journal":{"name":"2015 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"177 1","pages":"967-973"},"PeriodicalIF":0.0,"publicationDate":"2015-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79942953","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 : 2015-05-10DOI: 10.1109/IEMDC.2015.7409253
T. Goktas, M. Arkan, M. Zafarani, B. Akin
This paper presents separation harmonics to discriminate rotor failure from low frequency load torque oscillations in three phase induction motors. The most common method for detecting broken rotor bar faults is to analyze the corresponding sidebands through motor current signature analysis (MCSA). If a motor is subjected to load fluctuation, then the oscillation related sidebands exhibit similar behaviors as well. Particularly, when the load fluctuation frequency is close or equal to that of broken bars, the stator current spectrum analysis can be misleading. In this study, torque and motor phase voltage waveforms are exhaustively analyzed to discriminate broken rotor bar fault from low frequency load torque oscillation in three phase induction motors. In order to extract and justify the separation patterns, 2-D Time Stepping Finite Element Method (TSFEM) is used. The simulation and experimental results show that the proposed approach can successfully be applied to fault separation process in star connected motors.
{"title":"Separation harmonics for detecting broken bar fault in case of load torque oscillation","authors":"T. Goktas, M. Arkan, M. Zafarani, B. Akin","doi":"10.1109/IEMDC.2015.7409253","DOIUrl":"https://doi.org/10.1109/IEMDC.2015.7409253","url":null,"abstract":"This paper presents separation harmonics to discriminate rotor failure from low frequency load torque oscillations in three phase induction motors. The most common method for detecting broken rotor bar faults is to analyze the corresponding sidebands through motor current signature analysis (MCSA). If a motor is subjected to load fluctuation, then the oscillation related sidebands exhibit similar behaviors as well. Particularly, when the load fluctuation frequency is close or equal to that of broken bars, the stator current spectrum analysis can be misleading. In this study, torque and motor phase voltage waveforms are exhaustively analyzed to discriminate broken rotor bar fault from low frequency load torque oscillation in three phase induction motors. In order to extract and justify the separation patterns, 2-D Time Stepping Finite Element Method (TSFEM) is used. The simulation and experimental results show that the proposed approach can successfully be applied to fault separation process in star connected motors.","PeriodicalId":6477,"journal":{"name":"2015 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"140 1","pages":"1452-1458"},"PeriodicalIF":0.0,"publicationDate":"2015-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80051606","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 : 2015-05-10DOI: 10.1109/IEMDC.2015.7409098
S. Rakotovololona, M. Bergeron, J. Cros, P. Viarouge
This paper introduces a fast parameter identification technique for a two-order d-q model of a synchronous generator from Standstill Frequency Response (SSFR) tests. This identification method is based on a modified SSFR test and the curves of the no-load and sustained short-circuit tests. This allows the lowest SSFR frequency to be 0.01Hz instead of 0.001Hz. The phase and field resistances are measured from fast and precise DC tests during the SSFR test. In this work, the value of the unsaturated synchronous inductance is defined from the no-load air gap linearization and the short-circuit saturation curve. This definition fits better when the saturation is considered and we present how to implement this approach with the Matlab-Simulink SimPowerSystem standard d-q models. Validations are made using sudden short-circuit tests at nominal field current to evaluate d-q model performances with magnetic saturation.
{"title":"Parameter identification from SSFR tests and d-q model validation of synchronous generator","authors":"S. Rakotovololona, M. Bergeron, J. Cros, P. Viarouge","doi":"10.1109/IEMDC.2015.7409098","DOIUrl":"https://doi.org/10.1109/IEMDC.2015.7409098","url":null,"abstract":"This paper introduces a fast parameter identification technique for a two-order d-q model of a synchronous generator from Standstill Frequency Response (SSFR) tests. This identification method is based on a modified SSFR test and the curves of the no-load and sustained short-circuit tests. This allows the lowest SSFR frequency to be 0.01Hz instead of 0.001Hz. The phase and field resistances are measured from fast and precise DC tests during the SSFR test. In this work, the value of the unsaturated synchronous inductance is defined from the no-load air gap linearization and the short-circuit saturation curve. This definition fits better when the saturation is considered and we present how to implement this approach with the Matlab-Simulink SimPowerSystem standard d-q models. Validations are made using sudden short-circuit tests at nominal field current to evaluate d-q model performances with magnetic saturation.","PeriodicalId":6477,"journal":{"name":"2015 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"98 1","pages":"454-460"},"PeriodicalIF":0.0,"publicationDate":"2015-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89113833","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 : 2015-05-10DOI: 10.1109/IEMDC.2015.7409269
S. Schmuelling, Christoph Schmuelling, Stefan Habel
Today, there are two major influences on the life-cycle of turbine generators. The integration of volatile energy generation and the impact of liquid natural gas (LNG) lead to new operation conditions. Gas turbine systems increasing in importance. To modify synchronous generators and motors to fit new requirements, a closer look onto the excitation system is inevitable. The exciter has a major influence on the dynamics of the system. Therefore, a new excitation concept for turbine generators is discussed in the paper at hand.
{"title":"New excitation concepts for turbine generators","authors":"S. Schmuelling, Christoph Schmuelling, Stefan Habel","doi":"10.1109/IEMDC.2015.7409269","DOIUrl":"https://doi.org/10.1109/IEMDC.2015.7409269","url":null,"abstract":"Today, there are two major influences on the life-cycle of turbine generators. The integration of volatile energy generation and the impact of liquid natural gas (LNG) lead to new operation conditions. Gas turbine systems increasing in importance. To modify synchronous generators and motors to fit new requirements, a closer look onto the excitation system is inevitable. The exciter has a major influence on the dynamics of the system. Therefore, a new excitation concept for turbine generators is discussed in the paper at hand.","PeriodicalId":6477,"journal":{"name":"2015 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"38 1","pages":"1550-1555"},"PeriodicalIF":0.0,"publicationDate":"2015-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88394013","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 : 2015-05-10DOI: 10.1109/IEMDC.2015.7409139
J. Jansen, B. Gysen
This paper concerns a transfer system which is capable of moving products on conductive rollers which are driven by linear induction motors. The system is placed in between transport belts and minimizes dead spots when products are transferred from one belt to the other. The operation principle of the transfer is analyzed by 2-D finite element analyses. A design with a triple-layer, short-pitch winding is presented that minimizes manufacturing costs. The performance has been verified by measurements on a prototype.
{"title":"Induction motor driven active roller transfer for belt conveyor systems","authors":"J. Jansen, B. Gysen","doi":"10.1109/IEMDC.2015.7409139","DOIUrl":"https://doi.org/10.1109/IEMDC.2015.7409139","url":null,"abstract":"This paper concerns a transfer system which is capable of moving products on conductive rollers which are driven by linear induction motors. The system is placed in between transport belts and minimizes dead spots when products are transferred from one belt to the other. The operation principle of the transfer is analyzed by 2-D finite element analyses. A design with a triple-layer, short-pitch winding is presented that minimizes manufacturing costs. The performance has been verified by measurements on a prototype.","PeriodicalId":6477,"journal":{"name":"2015 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"13 1","pages":"721-727"},"PeriodicalIF":0.0,"publicationDate":"2015-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88568984","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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