Pub Date : 2013-10-24DOI: 10.1109/DEMPED.2013.6645748
D. Matic, Ž. Kanović, D. Reljic, F. Kulić, D. Oros, V. Vasic
This paper covers a case study of broken bar detection for 3.15 MW motor in a thermal power plant application. The motor current is measured in one phase. Feature extraction is based on transient and steady state analysis. Hilbert and Wavelet transforms are used to extract broken bar features. To discuss rotor condition in time domain skewness and kurtosis of current envelope are also considered. Low shaft-load conditions are present. In case of high-voltage, high-power induction motor reliable broken bar detection is possible when contemporary digital signal processing techniques are used.
{"title":"Broken bar detection using current analysis — A case study","authors":"D. Matic, Ž. Kanović, D. Reljic, F. Kulić, D. Oros, V. Vasic","doi":"10.1109/DEMPED.2013.6645748","DOIUrl":"https://doi.org/10.1109/DEMPED.2013.6645748","url":null,"abstract":"This paper covers a case study of broken bar detection for 3.15 MW motor in a thermal power plant application. The motor current is measured in one phase. Feature extraction is based on transient and steady state analysis. Hilbert and Wavelet transforms are used to extract broken bar features. To discuss rotor condition in time domain skewness and kurtosis of current envelope are also considered. Low shaft-load conditions are present. In case of high-voltage, high-power induction motor reliable broken bar detection is possible when contemporary digital signal processing techniques are used.","PeriodicalId":425644,"journal":{"name":"2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115133941","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 : 2013-10-24DOI: 10.1109/DEMPED.2013.6645713
D. Zurita, M. Delgado, J. Ortega, L. Romeral
The development of intelligent and autonomous monitoring systems applied to rotating machinery, represents the evolution towards the automatic industrial plants supervision. In this regard, an acoustic emission based intelligent sensor is presented in this work. The proposed sensor records regularly the acoustic emission signal generated by gearboxes. A time domain statistical analysis is applied in order to characterize the acquired data. Afterwards, a neural network based algorithm is applied to detect gear fault patterns. Finally, the diagnosis result is sent through a wireless transceiver to the central control unit. Moreover, in order to reach a real autonomous operation, the sensor power is approached by different energy harvesting solutions.
{"title":"Intelligent sensor based on acoustic emission analysis applied to gear fault diagnosis","authors":"D. Zurita, M. Delgado, J. Ortega, L. Romeral","doi":"10.1109/DEMPED.2013.6645713","DOIUrl":"https://doi.org/10.1109/DEMPED.2013.6645713","url":null,"abstract":"The development of intelligent and autonomous monitoring systems applied to rotating machinery, represents the evolution towards the automatic industrial plants supervision. In this regard, an acoustic emission based intelligent sensor is presented in this work. The proposed sensor records regularly the acoustic emission signal generated by gearboxes. A time domain statistical analysis is applied in order to characterize the acquired data. Afterwards, a neural network based algorithm is applied to detect gear fault patterns. Finally, the diagnosis result is sent through a wireless transceiver to the central control unit. Moreover, in order to reach a real autonomous operation, the sensor power is approached by different energy harvesting solutions.","PeriodicalId":425644,"journal":{"name":"2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121960118","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 : 2013-10-24DOI: 10.1109/DEMPED.2013.6645705
J. Pons-Llinares, J. Antonino-Daviu, M. Riera-Guasp, S. Lee, Tae-June Kang, C. Yang
Transient-based diagnosis of electromechanical failures in induction motors has gained an increasing attention over recent years. The diagnostic in some specific situations (presence of load toque oscillations, light loading conditions) or of specific failures may be difficult when using the classical MCSA approach. In this context, the transient-based methodologies have been proven to become valuable informational sources for the diagnosis, either confirming the MCSA results or avoiding its possible false positives. The application of these transient methodologies requires the use of modern signal processing tools that are in continuous evolution. This work proposes the application of an advanced tool; the recently developed Adaptive Slope Transform. The paper compares the performance of this continuous transform and that of a discrete counterpart, the Discrete Wavelet Transform, when applied to different controversial fault cases in which the classical MCSA may not lead to correct results: outer bar breakages in double cage motors and motors with rotor axial duct influence. The results show the potential of the continuous transforms for the transient tracking of high-order fault-related components as well as for the improved discrimination between fault components.
{"title":"Use of discrete and optimized continuous TFD tools for transient-based diagnosis in controversial fault cases","authors":"J. Pons-Llinares, J. Antonino-Daviu, M. Riera-Guasp, S. Lee, Tae-June Kang, C. Yang","doi":"10.1109/DEMPED.2013.6645705","DOIUrl":"https://doi.org/10.1109/DEMPED.2013.6645705","url":null,"abstract":"Transient-based diagnosis of electromechanical failures in induction motors has gained an increasing attention over recent years. The diagnostic in some specific situations (presence of load toque oscillations, light loading conditions) or of specific failures may be difficult when using the classical MCSA approach. In this context, the transient-based methodologies have been proven to become valuable informational sources for the diagnosis, either confirming the MCSA results or avoiding its possible false positives. The application of these transient methodologies requires the use of modern signal processing tools that are in continuous evolution. This work proposes the application of an advanced tool; the recently developed Adaptive Slope Transform. The paper compares the performance of this continuous transform and that of a discrete counterpart, the Discrete Wavelet Transform, when applied to different controversial fault cases in which the classical MCSA may not lead to correct results: outer bar breakages in double cage motors and motors with rotor axial duct influence. The results show the potential of the continuous transforms for the transient tracking of high-order fault-related components as well as for the improved discrimination between fault components.","PeriodicalId":425644,"journal":{"name":"2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116969428","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 : 2013-10-24DOI: 10.1109/DEMPED.2013.6645721
G. Stojcic, T. Wolbank
The wiring system between inverter and the machine consists of different parts connected by metal-to-metal joints. High load currents lead to an increase temperature of the connections and higher material degradation. Basically, these effects result in an increased resistance in one phase. If such faults are not identified timely an unexpected outage of the whole system can be a consequence. However, the degree of reliability of the wiring system should not be less than that of the machine or inverter. Detecting such small resistance incensement provide the possibility to react timely on the occurred fault. In this paper a method is presented to detect open-circuit faults in the stator windings of an inverter fed drive. The method gets along with the hardware already present and doesn't need additional sensors etc. By applying voltage phasor steps to the machine terminals and measuring the resulting current the phase resistance can be estimated. By combination of the current direction with the phase resistance value resistance phasors can introduced. With these phasors a high sensitive fault indicator is generated able to detect connection fault severity and position. Measurements on a laboratory test stand for different fault configurations prove the applicability and accuracy of the proposed method.
{"title":"Detecting high-resistance connection asymmetries in inverter fed AC drive systems","authors":"G. Stojcic, T. Wolbank","doi":"10.1109/DEMPED.2013.6645721","DOIUrl":"https://doi.org/10.1109/DEMPED.2013.6645721","url":null,"abstract":"The wiring system between inverter and the machine consists of different parts connected by metal-to-metal joints. High load currents lead to an increase temperature of the connections and higher material degradation. Basically, these effects result in an increased resistance in one phase. If such faults are not identified timely an unexpected outage of the whole system can be a consequence. However, the degree of reliability of the wiring system should not be less than that of the machine or inverter. Detecting such small resistance incensement provide the possibility to react timely on the occurred fault. In this paper a method is presented to detect open-circuit faults in the stator windings of an inverter fed drive. The method gets along with the hardware already present and doesn't need additional sensors etc. By applying voltage phasor steps to the machine terminals and measuring the resulting current the phase resistance can be estimated. By combination of the current direction with the phase resistance value resistance phasors can introduced. With these phasors a high sensitive fault indicator is generated able to detect connection fault severity and position. Measurements on a laboratory test stand for different fault configurations prove the applicability and accuracy of the proposed method.","PeriodicalId":425644,"journal":{"name":"2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125025472","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 : 2013-10-24DOI: 10.1109/DEMPED.2013.6645757
M. Moghadasian, A. Sivert, A. Yazidi, F. Betin, G. Capolino
This paper introduces a new technique for efficiency optimization of 6-phase induction motor (6PIM) drive, based on fuzzy online search control (SC) method. The modified SC algorithm does not require extra hardware and is insensitive to motor parameters. The results are compared to classic loss model control (LMC) efficiency optimization algorithm in healthy and faulted operational mode due to up to three stator open phases. The experimental results obtained on a dedicated test-bed validate the efficiency of the proposed method.
{"title":"Efficiency optimization on vector controlled six-phase induction motor in healthy and faulted mode","authors":"M. Moghadasian, A. Sivert, A. Yazidi, F. Betin, G. Capolino","doi":"10.1109/DEMPED.2013.6645757","DOIUrl":"https://doi.org/10.1109/DEMPED.2013.6645757","url":null,"abstract":"This paper introduces a new technique for efficiency optimization of 6-phase induction motor (6PIM) drive, based on fuzzy online search control (SC) method. The modified SC algorithm does not require extra hardware and is insensitive to motor parameters. The results are compared to classic loss model control (LMC) efficiency optimization algorithm in healthy and faulted operational mode due to up to three stator open phases. The experimental results obtained on a dedicated test-bed validate the efficiency of the proposed method.","PeriodicalId":425644,"journal":{"name":"2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116520084","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 : 2013-10-24DOI: 10.1109/DEMPED.2013.6645724
N. Freire, A. Cardoso
This paper presents a fault-tolerant converter intended for AC regenerative drives requiring improved reliability and availability. The standard six-switch three-phase converter is rearranged in order to obtain a four-switch tree-phase converter (FSTPC) during post-fault operation. Thus, its performance relies heavily on the fault diagnostic technique to trigger the remedial procedures, and on the control strategy to guarantee proper post-fault operation of the drive. With the aim to achieve these two goals effectively without increasing significantly the control system complexity, it is proposed to integrate, into the drive controller, a new and simple voltage-based approach for open-circuit fault diagnosis (without additional sensors), and vector-based hysteresis current control of the FSTPC. The performance of proposed fault-tolerant converter is evaluated by means of experimental results with a permanent magnet synchronous machine (PMSM) drive.
{"title":"Fault-tolerant converter for AC drives using vector-based hysteresis current control","authors":"N. Freire, A. Cardoso","doi":"10.1109/DEMPED.2013.6645724","DOIUrl":"https://doi.org/10.1109/DEMPED.2013.6645724","url":null,"abstract":"This paper presents a fault-tolerant converter intended for AC regenerative drives requiring improved reliability and availability. The standard six-switch three-phase converter is rearranged in order to obtain a four-switch tree-phase converter (FSTPC) during post-fault operation. Thus, its performance relies heavily on the fault diagnostic technique to trigger the remedial procedures, and on the control strategy to guarantee proper post-fault operation of the drive. With the aim to achieve these two goals effectively without increasing significantly the control system complexity, it is proposed to integrate, into the drive controller, a new and simple voltage-based approach for open-circuit fault diagnosis (without additional sensors), and vector-based hysteresis current control of the FSTPC. The performance of proposed fault-tolerant converter is evaluated by means of experimental results with a permanent magnet synchronous machine (PMSM) drive.","PeriodicalId":425644,"journal":{"name":"2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134021255","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 : 2013-10-24DOI: 10.1109/DEMPED.2013.6645751
A. Majid, J. Saleem, F. Alam, K. Bertilsson
The higher switching frequency in combination with di/dt loops and dv/dt nodes in the power stages of high frequency power converters generates higher order harmonics which cause Electro Magnetic Interference (EMI). It is commonly perceived that high frequency converters are more vulnerable to radiated EMI, thus, it is very important to analyze the radiated emission of these converters. According to the author's knowledge, the analysis of the radiated emission of power converters switching in the MHz frequency region has not been presented until now. Therefore, in this paper, the measurements, and analysis of the near field radiated emissions of these emerging power converters is presented. These measurements are beneficial in the early design stage of power converters. Both E-field and H-field and captured and analyzed for a half bridge converter switching at 3 MHz and at the output power level of 25 W. The effects of the magnetic and electric field emissions with the addition of a Y-capacitor and secondary side common mode choke are analyzed.
{"title":"Analysis of radiated EMI for power converters switching in MHz frequency range","authors":"A. Majid, J. Saleem, F. Alam, K. Bertilsson","doi":"10.1109/DEMPED.2013.6645751","DOIUrl":"https://doi.org/10.1109/DEMPED.2013.6645751","url":null,"abstract":"The higher switching frequency in combination with di/dt loops and dv/dt nodes in the power stages of high frequency power converters generates higher order harmonics which cause Electro Magnetic Interference (EMI). It is commonly perceived that high frequency converters are more vulnerable to radiated EMI, thus, it is very important to analyze the radiated emission of these converters. According to the author's knowledge, the analysis of the radiated emission of power converters switching in the MHz frequency region has not been presented until now. Therefore, in this paper, the measurements, and analysis of the near field radiated emissions of these emerging power converters is presented. These measurements are beneficial in the early design stage of power converters. Both E-field and H-field and captured and analyzed for a half bridge converter switching at 3 MHz and at the output power level of 25 W. The effects of the magnetic and electric field emissions with the addition of a Y-capacitor and secondary side common mode choke are analyzed.","PeriodicalId":425644,"journal":{"name":"2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131574900","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 : 2013-10-24DOI: 10.1109/DEMPED.2013.6645709
V. Ambrožič, R. Fišer, M. Nemec, K. Drobnič
This paper presents a control model of squirrel cage induction machine with broken rotor bars. The basis for model's equations is the fact that this type of faults inevitably alters the rotor parameters. Both the resistance and inductance take a sinusoidal shape, being a function of rotor angle, almost regardless of the configuration of fault. Differing from previous work, in this paper a model has been developed in rotor field coordinates, being this the preferable reference frame for machine control and thus easier for control engineers to grasp, especially in closed-looped systems. The approach has been tested on laboratory models of two different induction machines connected to the grid with completely different severities of faults. The results show a very good agreement between measurements and simulations.
{"title":"Dynamic model of induction machine with faulty rotor in field reference frame","authors":"V. Ambrožič, R. Fišer, M. Nemec, K. Drobnič","doi":"10.1109/DEMPED.2013.6645709","DOIUrl":"https://doi.org/10.1109/DEMPED.2013.6645709","url":null,"abstract":"This paper presents a control model of squirrel cage induction machine with broken rotor bars. The basis for model's equations is the fact that this type of faults inevitably alters the rotor parameters. Both the resistance and inductance take a sinusoidal shape, being a function of rotor angle, almost regardless of the configuration of fault. Differing from previous work, in this paper a model has been developed in rotor field coordinates, being this the preferable reference frame for machine control and thus easier for control engineers to grasp, especially in closed-looped systems. The approach has been tested on laboratory models of two different induction machines connected to the grid with completely different severities of faults. The results show a very good agreement between measurements and simulations.","PeriodicalId":425644,"journal":{"name":"2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134629063","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 : 2013-10-24DOI: 10.1109/DEMPED.2013.6645750
S. Hamdani, O. Touhami, R. Ibtiouen, M. Hasni
An analytical procedure for computing the inductances of an induction machine in presence of dynamic eccentricity fault is presented. The proposed method is based on the modified winding function approach and takes into consideration harmonics in the winding and the inverse air-gap functions. Results obtained by the analytical method are compared to these calculated by finite elements (FE) method and satisfactory match was found between them. Also, the developed equations allow a considerable saving of computing time compared to the finite element method, in particular when they are considered in the dynamic simulation of the induction machine.
{"title":"Analytical evaluation of inductances for induction machine with dynamic eccentricity using MWFA and FE methods","authors":"S. Hamdani, O. Touhami, R. Ibtiouen, M. Hasni","doi":"10.1109/DEMPED.2013.6645750","DOIUrl":"https://doi.org/10.1109/DEMPED.2013.6645750","url":null,"abstract":"An analytical procedure for computing the inductances of an induction machine in presence of dynamic eccentricity fault is presented. The proposed method is based on the modified winding function approach and takes into consideration harmonics in the winding and the inverse air-gap functions. Results obtained by the analytical method are compared to these calculated by finite elements (FE) method and satisfactory match was found between them. Also, the developed equations allow a considerable saving of computing time compared to the finite element method, in particular when they are considered in the dynamic simulation of the induction machine.","PeriodicalId":425644,"journal":{"name":"2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132529061","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 : 2013-10-24DOI: 10.1109/DEMPED.2013.6645727
Zheng Liu, W. Cao, Z. Tan, Xueguan Song, B. Ji, G. Tian
The doubly fed induction generator (DFIG) plays an important role in the wind power generation. With the ever-increasing demand for improving the reliability and energy efficiency whilst reducing the maintenance and operational costs, there is a trend to develop the state-of-the-art condition monitoring technologies in wind applications especially for offshore applications. Winding short-circuits faults are among major electrical failures in DFIGs and can be caused by many reasons and can lead to undesirable heating to impact on the performance of the machine. They have not been fully understood due to the complexity of the problem which requires 3D electromagnetic and thermal fields to understand the fault mechanisms. This paper presents coupled electromagnetic and thermal field analyses of DFIGs with a focus on winding faults. Finite element tools are used for analyzing the characteristics of magnetic field, temperature distribution and heat flow during the healthy and faulty operations. This work can provide an insight into the DFIG's stator and rotor winding faults and suggestions for improvement in thermal design of the DFIG machines.
{"title":"Electromagnetic and temperature field analyses of winding short-circuits in DFIGs","authors":"Zheng Liu, W. Cao, Z. Tan, Xueguan Song, B. Ji, G. Tian","doi":"10.1109/DEMPED.2013.6645727","DOIUrl":"https://doi.org/10.1109/DEMPED.2013.6645727","url":null,"abstract":"The doubly fed induction generator (DFIG) plays an important role in the wind power generation. With the ever-increasing demand for improving the reliability and energy efficiency whilst reducing the maintenance and operational costs, there is a trend to develop the state-of-the-art condition monitoring technologies in wind applications especially for offshore applications. Winding short-circuits faults are among major electrical failures in DFIGs and can be caused by many reasons and can lead to undesirable heating to impact on the performance of the machine. They have not been fully understood due to the complexity of the problem which requires 3D electromagnetic and thermal fields to understand the fault mechanisms. This paper presents coupled electromagnetic and thermal field analyses of DFIGs with a focus on winding faults. Finite element tools are used for analyzing the characteristics of magnetic field, temperature distribution and heat flow during the healthy and faulty operations. This work can provide an insight into the DFIG's stator and rotor winding faults and suggestions for improvement in thermal design of the DFIG machines.","PeriodicalId":425644,"journal":{"name":"2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121481749","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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