Pub Date : 2014-11-20DOI: 10.1109/ICELMACH.2014.6960549
T. H. Santos, A. Goedtel, S. A. O. Silva, M. Suetake
This work proposes an artificial neural network approach to estimate the induction motor speed applied in a closed-loop scalar control. The induction motor speed is the important quantity in an industrial process. Thus, when the load coupled to the axis needs speed control, some of the drive and control strategies are based on the estimated axis speed of the motor. This paper proposes an alternative methodology for estimating the speed of a three phase induction motor driven by a voltage source inverter, using space vector modulation under the scalar control strategy and based on artificial neural networks. Experimental results are presented to validate the performance of the proposed method under motor load torque and speed reference set point variations.
{"title":"Speed estimator in closed-loop scalar control using neural networks","authors":"T. H. Santos, A. Goedtel, S. A. O. Silva, M. Suetake","doi":"10.1109/ICELMACH.2014.6960549","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960549","url":null,"abstract":"This work proposes an artificial neural network approach to estimate the induction motor speed applied in a closed-loop scalar control. The induction motor speed is the important quantity in an industrial process. Thus, when the load coupled to the axis needs speed control, some of the drive and control strategies are based on the estimated axis speed of the motor. This paper proposes an alternative methodology for estimating the speed of a three phase induction motor driven by a voltage source inverter, using space vector modulation under the scalar control strategy and based on artificial neural networks. Experimental results are presented to validate the performance of the proposed method under motor load torque and speed reference set point variations.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"2 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":"134060400","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.2014.6960185
M. Harke
This paper deals with the analytical description of an interior permanent magnet synchronous motor running in six-step conduction mode. It assumes a non-sinusoidal back emf, but inductances vary sinusoidally with the rotor position. The proposed model renounces Park's transformation and delivers a set of equations which allow the numerical simulation of phase currents and torque in the abc reference frame. This model reveals the influence of the phase advance angle on the characteristics of current flow. By means of the simulation model two control strategies are shown - maximum torque per amp control and flux weakening.
{"title":"Modeling of interior permanent magnet synchronous motors in the six-step conduction mode","authors":"M. Harke","doi":"10.1109/ICELMACH.2014.6960185","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960185","url":null,"abstract":"This paper deals with the analytical description of an interior permanent magnet synchronous motor running in six-step conduction mode. It assumes a non-sinusoidal back emf, but inductances vary sinusoidally with the rotor position. The proposed model renounces Park's transformation and delivers a set of equations which allow the numerical simulation of phase currents and torque in the abc reference frame. This model reveals the influence of the phase advance angle on the characteristics of current flow. By means of the simulation model two control strategies are shown - maximum torque per amp control and flux weakening.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"9 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":"134320368","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.2014.6960446
I. M. Y. Negara, P. Sakti, D. Fahmi, D. A. Asfani
Turn fault caused by winding insulation deterioration is the most frequently fault occurring in induction motor. In several cases, induction motor that gets inter-turn fault with a small value has same current waveform as a nomal condition. Therefore, the inter-turn fault in induction motor can't be only identified by monitoring the motor current. In this paper, a new method to overcome that issue is proposed. The idea utilizes an oscillating wave to detect small number of inter-turn fault. The oscillating wave is produced using the Cockcroft-Walton Multiplier circuit and some additonal circuits that is more economical. This paper presents experimental test on several inter-turn fault conditions to confirm the effectiveness of this method. Moreover, Error Area Ratio (EAR) is also used to further emphasize the advantage of the method. The results show that the proposed method is more sensitive and has better precision to identify small number of inter-turn fault.
{"title":"Oscillating circuit design for inter-turn fault diagnostic in low-voltage induction motor","authors":"I. M. Y. Negara, P. Sakti, D. Fahmi, D. A. Asfani","doi":"10.1109/ICELMACH.2014.6960446","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960446","url":null,"abstract":"Turn fault caused by winding insulation deterioration is the most frequently fault occurring in induction motor. In several cases, induction motor that gets inter-turn fault with a small value has same current waveform as a nomal condition. Therefore, the inter-turn fault in induction motor can't be only identified by monitoring the motor current. In this paper, a new method to overcome that issue is proposed. The idea utilizes an oscillating wave to detect small number of inter-turn fault. The oscillating wave is produced using the Cockcroft-Walton Multiplier circuit and some additonal circuits that is more economical. This paper presents experimental test on several inter-turn fault conditions to confirm the effectiveness of this method. Moreover, Error Area Ratio (EAR) is also used to further emphasize the advantage of the method. The results show that the proposed method is more sensitive and has better precision to identify small number of inter-turn fault.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"20 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":"131760574","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.2014.6960540
J. B. Bartolo, C. Gerada
The work done in designing a high speed starter-generator for an aircraft engine will be presented in this paper. The electrical machine is of the variable reluctance type, which was chosen due to its inherent robustness, ease of manufacture and reliability. The Starter-Generator function requires the machine to initially act as a motor, spinning the aero-engine through the starting sequence, till light-off speed, (maximum torque condition). It then continues to assist the engine till idle speed is reached, following which the machine acts as a generator. The machine described was designed to deliver its maximum torque of 54Nm at 8000rpm, and will be required to supply a 45kW load at shaft speeds up to 32000rpm. The design envelope is the same as that used in sizing starter-generators for use in the latest models of regional jets. This paper details the challenges in designing such a machine to meet the wide constant power speed range required, and proposes a novel rotor structure as a possible solution.
{"title":"The electromagnetic design of a high speed, 45kW, switched reluctance machine having a novel rotor geometry for aerospace application","authors":"J. B. Bartolo, C. Gerada","doi":"10.1109/ICELMACH.2014.6960540","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960540","url":null,"abstract":"The work done in designing a high speed starter-generator for an aircraft engine will be presented in this paper. The electrical machine is of the variable reluctance type, which was chosen due to its inherent robustness, ease of manufacture and reliability. The Starter-Generator function requires the machine to initially act as a motor, spinning the aero-engine through the starting sequence, till light-off speed, (maximum torque condition). It then continues to assist the engine till idle speed is reached, following which the machine acts as a generator. The machine described was designed to deliver its maximum torque of 54Nm at 8000rpm, and will be required to supply a 45kW load at shaft speeds up to 32000rpm. The design envelope is the same as that used in sizing starter-generators for use in the latest models of regional jets. This paper details the challenges in designing such a machine to meet the wide constant power speed range required, and proposes a novel rotor structure as a possible solution.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"91 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":"130891537","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.2014.6960381
S. Sahoo, P. Rodríguez, M. Sułowicz
Ideal condition of a synchronous machine and subsequent fault models representing rotor eccentricity of different types as well as inter-turn short circuits in stator and rotor are created with finite element method simulation for a specially designed SM. This machine has provisions of recreating the same faults made in the simulations by suitable changeover of customized end-shields and sleeves in the shaft assembly for various eccentricity faults or introducing short circuits through accessible terminals of the stator and rotor windings. The fault indicators for characterizing such failures are identified and are measured through experiments. Clear difference obtained between separate fault signatures help identifying and discriminating rotor and stator related failures. With fair understanding of geometry, physical dimensions and the ability to model the complex portions of healthy as well faulty conditions, such a concept helps to create a know-how to detect different failures, well before a catastrophic event takes place.
{"title":"Comparative investigation of fault indicators for synchronous machine failures","authors":"S. Sahoo, P. Rodríguez, M. Sułowicz","doi":"10.1109/ICELMACH.2014.6960381","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960381","url":null,"abstract":"Ideal condition of a synchronous machine and subsequent fault models representing rotor eccentricity of different types as well as inter-turn short circuits in stator and rotor are created with finite element method simulation for a specially designed SM. This machine has provisions of recreating the same faults made in the simulations by suitable changeover of customized end-shields and sleeves in the shaft assembly for various eccentricity faults or introducing short circuits through accessible terminals of the stator and rotor windings. The fault indicators for characterizing such failures are identified and are measured through experiments. Clear difference obtained between separate fault signatures help identifying and discriminating rotor and stator related failures. With fair understanding of geometry, physical dimensions and the ability to model the complex portions of healthy as well faulty conditions, such a concept helps to create a know-how to detect different failures, well before a catastrophic event takes place.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"16 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":"130980018","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.2014.6960518
A. Kock, M. Groninger, A. Mertens
In this paper, fault tolerant topologies based on permanent magnet synchronous machines (PMSM) are presented. A numerical model for the simulation of the operational behaviour under normal and fault conditions is developed and validated by test bench measurements. For different fault tolerant topologies, control strategies for normal and post-fault operation are presented and validated by measurements and simulations. In post-fault operation, the presented control-strategies allow the compensation of braking torques and to avoid overvoltages at the machine terminals. In normal operation, the additional degrees of freedom are utilized to improve operational behaviour in various aspects.
{"title":"Modeling and control of fault tolerant drive topologies for electric vehicle applications","authors":"A. Kock, M. Groninger, A. Mertens","doi":"10.1109/ICELMACH.2014.6960518","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960518","url":null,"abstract":"In this paper, fault tolerant topologies based on permanent magnet synchronous machines (PMSM) are presented. A numerical model for the simulation of the operational behaviour under normal and fault conditions is developed and validated by test bench measurements. For different fault tolerant topologies, control strategies for normal and post-fault operation are presented and validated by measurements and simulations. In post-fault operation, the presented control-strategies allow the compensation of braking torques and to avoid overvoltages at the machine terminals. In normal operation, the additional degrees of freedom are utilized to improve operational behaviour in various aspects.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"24 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":"124292479","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.2014.6960536
A. P. Moschoudis, G. Tsekouras, F. Kanellos
Design and operation analysis of electrical machines can be performed by using either full-size or different scale models. This paper deals with the development of electromagnetic field analysis and electrical circuit models of geometrically similar electrical machines based on similarity theory and scale factors. The proposed methodology can be exploited for the design of micro and nano scale electrical machines used in medical and other applications, as it allows the construction of up-scale models more suitable for laboratory measurements.
{"title":"Design of particular electrical machines by using similarity theory and scale factors","authors":"A. P. Moschoudis, G. Tsekouras, F. Kanellos","doi":"10.1109/ICELMACH.2014.6960536","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960536","url":null,"abstract":"Design and operation analysis of electrical machines can be performed by using either full-size or different scale models. This paper deals with the development of electromagnetic field analysis and electrical circuit models of geometrically similar electrical machines based on similarity theory and scale factors. The proposed methodology can be exploited for the design of micro and nano scale electrical machines used in medical and other applications, as it allows the construction of up-scale models more suitable for laboratory measurements.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"10 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":"114575979","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.2014.6960406
W. Rams, M. Rad
A new method of detecting insulation faults in cores of AC machines is outlined. The method involves the measurements of the magnetic field near the surface of the core, using a number of parallel electronic field meters. It is demonstrated that the new method does not share the disadvantages of other methods as it does not require a high current source and long operation time compared with the thermal method. Besides, it offers a better resolution than the ELCID method. A dedicated computer program is used to measure and visualize results, which can be displayed in the form similar to those obtained from a thermal camera. The method is applicable both to synchronous generators and induction machines.
{"title":"System for core fault detection of AC electric machines, based on magnetic field scanning","authors":"W. Rams, M. Rad","doi":"10.1109/ICELMACH.2014.6960406","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960406","url":null,"abstract":"A new method of detecting insulation faults in cores of AC machines is outlined. The method involves the measurements of the magnetic field near the surface of the core, using a number of parallel electronic field meters. It is demonstrated that the new method does not share the disadvantages of other methods as it does not require a high current source and long operation time compared with the thermal method. Besides, it offers a better resolution than the ELCID method. A dedicated computer program is used to measure and visualize results, which can be displayed in the form similar to those obtained from a thermal camera. The method is applicable both to synchronous generators and induction machines.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"22 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":"114792666","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.2014.6960534
M. Beniakar, P. Kakosimos, C. Krasopoulos, A. Sarigiannidis, A. Kladas
This paper undertakes a comparative study between two different in-wheel Surface Mounted Permanent Magnet motors with Fractional Slot Concentrated Winding configurations designed for a light electric vehicle application. For the design of both motors two different approaches are followed, regarding the winding configuration and the relative dimensions of the motor, i.e. axial length and air-gap diameter, and additionally two alternative strategies are adopted concerning the selection of the reference operational point. The first motor comprises a double layer concentrated winding with all teeth wound while is slightly over-dimensioned increasing efficiency during overload operation. A single layer concentrated winding with alternate teeth wound and unequal teeth distribution is adopted for the second motor dimensioned in terms of weight minimization considering the nominal load operation. For the optimization of the first alternative, Taguchi's method is utilized, while for the latter one a Strength Pareto Evolutionary Algorithm variant is developed. Both performances are validated by examining manufactured prototypes under real conditions.
{"title":"Comparison of in-wheel permanent magnet motors for electric traction","authors":"M. Beniakar, P. Kakosimos, C. Krasopoulos, A. Sarigiannidis, A. Kladas","doi":"10.1109/ICELMACH.2014.6960534","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960534","url":null,"abstract":"This paper undertakes a comparative study between two different in-wheel Surface Mounted Permanent Magnet motors with Fractional Slot Concentrated Winding configurations designed for a light electric vehicle application. For the design of both motors two different approaches are followed, regarding the winding configuration and the relative dimensions of the motor, i.e. axial length and air-gap diameter, and additionally two alternative strategies are adopted concerning the selection of the reference operational point. The first motor comprises a double layer concentrated winding with all teeth wound while is slightly over-dimensioned increasing efficiency during overload operation. A single layer concentrated winding with alternate teeth wound and unequal teeth distribution is adopted for the second motor dimensioned in terms of weight minimization considering the nominal load operation. For the optimization of the first alternative, Taguchi's method is utilized, while for the latter one a Strength Pareto Evolutionary Algorithm variant is developed. Both performances are validated by examining manufactured prototypes under real conditions.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"530 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":"123935228","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.2014.6960208
G. Dajaku, D. Gerling
The new stator structure with magnetic flux-barriers in the stator yoke or tooth region represents an efficient method for reducing the sub-harmonics of electric machines with fractional slots, tooth-concentrated windings. In this paper the both flux-barriers techniques are considered during the analysis of different PM machines. The 12-teeth single-layer and double-layer concentrated winding in combination with a 10-poles and 14-poles PM rotor are investigated. For the all machine topologies the new stator design is used to improve their performances and characteristics. The flux-barrier effects on the main machine parameters, such as in the air-gap flux density harmonics, dq-machine parameters, characteristic currents, electromagnetic torque, and so on, are studied carefully. Comparisons performed with the analogous conventional machines (with conventional stator) show that, the new stator design offers significant advantages.
{"title":"Analysis of different PM machines with concentrated windings and flux barriers in stator core","authors":"G. Dajaku, D. Gerling","doi":"10.1109/ICELMACH.2014.6960208","DOIUrl":"https://doi.org/10.1109/ICELMACH.2014.6960208","url":null,"abstract":"The new stator structure with magnetic flux-barriers in the stator yoke or tooth region represents an efficient method for reducing the sub-harmonics of electric machines with fractional slots, tooth-concentrated windings. In this paper the both flux-barriers techniques are considered during the analysis of different PM machines. The 12-teeth single-layer and double-layer concentrated winding in combination with a 10-poles and 14-poles PM rotor are investigated. For the all machine topologies the new stator design is used to improve their performances and characteristics. The flux-barrier effects on the main machine parameters, such as in the air-gap flux density harmonics, dq-machine parameters, characteristic currents, electromagnetic torque, and so on, are studied carefully. Comparisons performed with the analogous conventional machines (with conventional stator) show that, the new stator design offers significant advantages.","PeriodicalId":288960,"journal":{"name":"2014 International Conference on Electrical Machines (ICEM)","volume":"4 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":"126122728","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：