Pub Date : 2012-12-24DOI: 10.1109/ESARS.2012.6387444
C. Bruzzese, T. Mazzuca
The Italian Navy committed in 2006 to the Department of Astronautics, Electrical, and Energy Engineering-University of Rome “Sapienza” a Research Program aimed to define an automated procedure for air-gap monitoring of onboard generators. An effective solution was needed to overcome the heavy shortcomings of usual manual measurement practices. This paper describes the research work which led to very reliable rotor eccentricity indicators, based on measurement of internal currents in armature windings with parallel connections. The new approach permits absolute on-line estimations of both static and dynamic rotor shaft misalignments. A fully operative demonstrative system has been developed in the Department's laboratory. A four pole 17kVA generator was used for experiments, with artificial eccentricities produced by an apposite mechanical flange. A virtual instrument was used for data acquisition and processing, so obtaining a real-time estimation of the actual shaft misalignment. Comparison of data obtained from simulations and tests prove the reliability of the proposed methodology.
{"title":"DIEM project's outcomes: An automated air-gap monitoring approach for Italian Navy's on-board low-voltage generators","authors":"C. Bruzzese, T. Mazzuca","doi":"10.1109/ESARS.2012.6387444","DOIUrl":"https://doi.org/10.1109/ESARS.2012.6387444","url":null,"abstract":"The Italian Navy committed in 2006 to the Department of Astronautics, Electrical, and Energy Engineering-University of Rome “Sapienza” a Research Program aimed to define an automated procedure for air-gap monitoring of onboard generators. An effective solution was needed to overcome the heavy shortcomings of usual manual measurement practices. This paper describes the research work which led to very reliable rotor eccentricity indicators, based on measurement of internal currents in armature windings with parallel connections. The new approach permits absolute on-line estimations of both static and dynamic rotor shaft misalignments. A fully operative demonstrative system has been developed in the Department's laboratory. A four pole 17kVA generator was used for experiments, with artificial eccentricities produced by an apposite mechanical flange. A virtual instrument was used for data acquisition and processing, so obtaining a real-time estimation of the actual shaft misalignment. Comparison of data obtained from simulations and tests prove the reliability of the proposed methodology.","PeriodicalId":243822,"journal":{"name":"2012 Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126240780","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 : 2012-12-24DOI: 10.1109/ESARS.2012.6387377
X. Giraud, H. Piquet, M. Budinger, X. Roboam, M. Sartor, S. Vial
Aircraft electrical power system (EPS), in charge of supplying power to aircraft electric systems, needs a reconfiguration capability in order to overcome cases of EPS component failures. During the design phase, EPS reconfiguration elicitation is a complex task due to the high number of failure combinations and to the aeronautical operational constraints, which are to be taken into account. Therefore a knowledge-based system is developed in order to help designers for such a task. It is based on the implementation of two different types of rules: mandatory and know-how rules. EPS connectivity is managed by graph-theory algorithms. The knowledge-based system is capable of producing several reconfiguration solutions. The knowledge-based system functioning is illustrated in detail on a simplified EPS. Results on an actual and modern EPS are also presented.
{"title":"Knowledge-based system for aircraft electrical power system reconfiguration","authors":"X. Giraud, H. Piquet, M. Budinger, X. Roboam, M. Sartor, S. Vial","doi":"10.1109/ESARS.2012.6387377","DOIUrl":"https://doi.org/10.1109/ESARS.2012.6387377","url":null,"abstract":"Aircraft electrical power system (EPS), in charge of supplying power to aircraft electric systems, needs a reconfiguration capability in order to overcome cases of EPS component failures. During the design phase, EPS reconfiguration elicitation is a complex task due to the high number of failure combinations and to the aeronautical operational constraints, which are to be taken into account. Therefore a knowledge-based system is developed in order to help designers for such a task. It is based on the implementation of two different types of rules: mandatory and know-how rules. EPS connectivity is managed by graph-theory algorithms. The knowledge-based system is capable of producing several reconfiguration solutions. The knowledge-based system functioning is illustrated in detail on a simplified EPS. Results on an actual and modern EPS are also presented.","PeriodicalId":243822,"journal":{"name":"2012 Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126570756","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 : 2012-12-24DOI: 10.1109/ESARS.2012.6387500
H. Witzenhausen, S. Kabitz, D. Sauer
In this work a three dimensional impedance-based electric battery model is coupled with a thermal model. Both parts are verified by comparing measurement and simulation. Subsequently the model is used to simulate a locally limited internal short-circuit inside a cell and inside a battery pack. Based on the simulations, suggestions for improvements of passive safety are made.
{"title":"Coupled thermal and impedance based spatially resolved electric model for fault analysis of lithium ion battery modules","authors":"H. Witzenhausen, S. Kabitz, D. Sauer","doi":"10.1109/ESARS.2012.6387500","DOIUrl":"https://doi.org/10.1109/ESARS.2012.6387500","url":null,"abstract":"In this work a three dimensional impedance-based electric battery model is coupled with a thermal model. Both parts are verified by comparing measurement and simulation. Subsequently the model is used to simulate a locally limited internal short-circuit inside a cell and inside a battery pack. Based on the simulations, suggestions for improvements of passive safety are made.","PeriodicalId":243822,"journal":{"name":"2012 Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128115712","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 : 2012-12-24DOI: 10.1109/ESARS.2012.6387396
Seokhwan Lee, Guho Jung, Seungyong Shin, Yangsu Kim, Boyune Song, Jaegue Shin, D. Cho
In this paper, the wireless power transfer technology is applied to the high-powered train system. Through applying wireless power transfer technology, many defects of original train system (wired power transfer) can be overcome. The optimal design of power supply module for wireless power transfer system is required to make a 100kW power supply. Three approaches for deciding optimal design of power supply module are discussed. Three approaches are on about induced voltage of pick-up modules in various size of power supply, heat generation due to the magnetic flux from primary coil and types of the power supplying cables. Coupled simulations about magnetic-heat transfer and electrical experiments are conducted.
{"title":"The optimal design of high-powered power supply modules for wireless power transferred train","authors":"Seokhwan Lee, Guho Jung, Seungyong Shin, Yangsu Kim, Boyune Song, Jaegue Shin, D. Cho","doi":"10.1109/ESARS.2012.6387396","DOIUrl":"https://doi.org/10.1109/ESARS.2012.6387396","url":null,"abstract":"In this paper, the wireless power transfer technology is applied to the high-powered train system. Through applying wireless power transfer technology, many defects of original train system (wired power transfer) can be overcome. The optimal design of power supply module for wireless power transfer system is required to make a 100kW power supply. Three approaches for deciding optimal design of power supply module are discussed. Three approaches are on about induced voltage of pick-up modules in various size of power supply, heat generation due to the magnetic flux from primary coil and types of the power supplying cables. Coupled simulations about magnetic-heat transfer and electrical experiments are conducted.","PeriodicalId":243822,"journal":{"name":"2012 Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127944664","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 : 2012-12-24DOI: 10.1109/ESARS.2012.6387465
V. Musolino, L. Piegari, E. Tironi
A confluence of industry, social, environmental and economical drivers is creating new interest in electric energy storage systems. The limitation in the energy resources availability, the continuing increasing of the fossil fuels cost and the more attention to the earth ecosystem, is making storage systems a suitable solution in many applications ranging from grid application toward the industrial and transportation ones. In this paper a review of actual electrical storage technologies suitable for transportation and naval applications is provided with particular attention to the functionalities that is possible to introduce according to the selected technology. Moreover, the applications of storage systems in land and naval handling will be analyzed in details underlining the advantages deriving by the introduction of opportunely chosen storage units.
{"title":"Storage systems for transportation, land handling and naval applications","authors":"V. Musolino, L. Piegari, E. Tironi","doi":"10.1109/ESARS.2012.6387465","DOIUrl":"https://doi.org/10.1109/ESARS.2012.6387465","url":null,"abstract":"A confluence of industry, social, environmental and economical drivers is creating new interest in electric energy storage systems. The limitation in the energy resources availability, the continuing increasing of the fossil fuels cost and the more attention to the earth ecosystem, is making storage systems a suitable solution in many applications ranging from grid application toward the industrial and transportation ones. In this paper a review of actual electrical storage technologies suitable for transportation and naval applications is provided with particular attention to the functionalities that is possible to introduce according to the selected technology. Moreover, the applications of storage systems in land and naval handling will be analyzed in details underlining the advantages deriving by the introduction of opportunely chosen storage units.","PeriodicalId":243822,"journal":{"name":"2012 Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115839772","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 : 2012-12-24DOI: 10.1109/ESARS.2012.6387442
M. Miroševic, Z. Maljkovic
The aim of this paper is to analyze the dynamics of diesel generator units with different proportional-integral voltage controller parameters. Effect of changes of gain and time constant of voltage controller, during direct-on-line starting loaded induction motors connected to a synchronous generator in autonomous operation, is considered.
{"title":"The dynamics of diesel generator units with different voltage controller parameters","authors":"M. Miroševic, Z. Maljkovic","doi":"10.1109/ESARS.2012.6387442","DOIUrl":"https://doi.org/10.1109/ESARS.2012.6387442","url":null,"abstract":"The aim of this paper is to analyze the dynamics of diesel generator units with different proportional-integral voltage controller parameters. Effect of changes of gain and time constant of voltage controller, during direct-on-line starting loaded induction motors connected to a synchronous generator in autonomous operation, is considered.","PeriodicalId":243822,"journal":{"name":"2012 Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132551669","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 : 2012-12-24DOI: 10.1109/ESARS.2012.6387392
R. Narayanswamy, D. P. Mahajan, S. Bavisetti
Solenoid is an electromagnetically operated actuator. One of the typical applications of solenoid is to operate valves in aircraft engine under harsh environmental conditions and high endurance requirements. Solenoid coil is wound around an insulator (e.g. PTFE / Polyimide/ Nomex etc) which is generally called as bobbin. Classical bobbin construction reduces the available window area for the coil winding. This successively reduces the number of turns that can be accommodated in the reduced window area. MMF (Magneto Motive Force) is the product of the number of turns and the magnitude of the coil current. Due to reduction in the MMF, the magnetic field strength of the solenoid reduces and the force generated by the solenoid gets decreased. The proposed topology of the solenoid eliminates the bobbin for reducing the size of solenoid coils or in other words more window area is available against the classical bobbin designs. The proposed method aims at generating higher force for the constrained size or generating the same force with less size and weight of the solenoid.
{"title":"Unified coil solenoid actuator for aerospace application","authors":"R. Narayanswamy, D. P. Mahajan, S. Bavisetti","doi":"10.1109/ESARS.2012.6387392","DOIUrl":"https://doi.org/10.1109/ESARS.2012.6387392","url":null,"abstract":"Solenoid is an electromagnetically operated actuator. One of the typical applications of solenoid is to operate valves in aircraft engine under harsh environmental conditions and high endurance requirements. Solenoid coil is wound around an insulator (e.g. PTFE / Polyimide/ Nomex etc) which is generally called as bobbin. Classical bobbin construction reduces the available window area for the coil winding. This successively reduces the number of turns that can be accommodated in the reduced window area. MMF (Magneto Motive Force) is the product of the number of turns and the magnitude of the coil current. Due to reduction in the MMF, the magnetic field strength of the solenoid reduces and the force generated by the solenoid gets decreased. The proposed topology of the solenoid eliminates the bobbin for reducing the size of solenoid coils or in other words more window area is available against the classical bobbin designs. The proposed method aims at generating higher force for the constrained size or generating the same force with less size and weight of the solenoid.","PeriodicalId":243822,"journal":{"name":"2012 Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133855084","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 : 2012-12-24DOI: 10.1109/ESARS.2012.6387403
A. Ogunsola, A. Mariscotti, L. Sandrolini
The measured harmonic content (voltage and current) of the AC side of a rectifier substation of a DC electrified railway, Dubai Metro, is presented. The measured harmonic content is assessed for compliance against the permissible limits specified in IEEE Std 519. Some results are also given for the amplitude of characteristic and noncharacteristic harmonics with respect to the output current and delivered power.
{"title":"Measurement of AC side harmonics of a DC metro railway","authors":"A. Ogunsola, A. Mariscotti, L. Sandrolini","doi":"10.1109/ESARS.2012.6387403","DOIUrl":"https://doi.org/10.1109/ESARS.2012.6387403","url":null,"abstract":"The measured harmonic content (voltage and current) of the AC side of a rectifier substation of a DC electrified railway, Dubai Metro, is presented. The measured harmonic content is assessed for compliance against the permissible limits specified in IEEE Std 519. Some results are also given for the amplitude of characteristic and noncharacteristic harmonics with respect to the output current and delivered power.","PeriodicalId":243822,"journal":{"name":"2012 Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123632893","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 : 2012-12-24DOI: 10.1109/ESARS.2012.6387438
T. Konishi, Masahiro Tobita
The fixed energy storage system solves the problem of rising energy costs by reducing primary energy consumption. Without a fixed energy storage system, the energy generated by a breaking vehicle would be simply converted into waste heat by its breaking resistors if no other vehicles are powered simultaneously. Because, as a rule, such synchronization of breaking and powering cannot be coordinated, the energy storage system stores the energy generated during braking and discharges it again when a vehicle is powered. This greatly reduces primary energy demand in traction power substation. However, in addition to this energy saving, the energy storage system contributes to the reduction of CO2 emissions. The energy storage system also stabilizes the system voltage. This study introduces technologies of fixed energy storage system applicable for DC electrified railway in Japan, and describes new control method for energy storage system.
{"title":"Fixed energy storage technology applied for DC electrified railway (traction power substation)","authors":"T. Konishi, Masahiro Tobita","doi":"10.1109/ESARS.2012.6387438","DOIUrl":"https://doi.org/10.1109/ESARS.2012.6387438","url":null,"abstract":"The fixed energy storage system solves the problem of rising energy costs by reducing primary energy consumption. Without a fixed energy storage system, the energy generated by a breaking vehicle would be simply converted into waste heat by its breaking resistors if no other vehicles are powered simultaneously. Because, as a rule, such synchronization of breaking and powering cannot be coordinated, the energy storage system stores the energy generated during braking and discharges it again when a vehicle is powered. This greatly reduces primary energy demand in traction power substation. However, in addition to this energy saving, the energy storage system contributes to the reduction of CO2 emissions. The energy storage system also stabilizes the system voltage. This study introduces technologies of fixed energy storage system applicable for DC electrified railway in Japan, and describes new control method for energy storage system.","PeriodicalId":243822,"journal":{"name":"2012 Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124060592","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 : 2012-12-24DOI: 10.1109/ESARS.2012.6387461
H. Mosskull, J. Galic, M. Jansson
A control scheme is presented for the robust performance of permanent magnet synchronous motor drives in the presence of voltage and current constraints. Strategies like Maximum Torque per Ampere (MTPA) are straightforward to implement and the approach is well suited for field-weakening and full voltage utilization of the inverter. In combination with fast torque control, these properties make the scheme ideal for traction applications, where weight and size constraints require a minimal inverter. The approach has been evaluated on trains in passenger service. These tests have shown that stability and performance are maintained over the entire range of operating conditions.
{"title":"Robust and efficient torque control of permanent magnet synchronous motors in traction applications","authors":"H. Mosskull, J. Galic, M. Jansson","doi":"10.1109/ESARS.2012.6387461","DOIUrl":"https://doi.org/10.1109/ESARS.2012.6387461","url":null,"abstract":"A control scheme is presented for the robust performance of permanent magnet synchronous motor drives in the presence of voltage and current constraints. Strategies like Maximum Torque per Ampere (MTPA) are straightforward to implement and the approach is well suited for field-weakening and full voltage utilization of the inverter. In combination with fast torque control, these properties make the scheme ideal for traction applications, where weight and size constraints require a minimal inverter. The approach has been evaluated on trains in passenger service. These tests have shown that stability and performance are maintained over the entire range of operating conditions.","PeriodicalId":243822,"journal":{"name":"2012 Electrical Systems for Aircraft, Railway and Ship Propulsion","volume":"1958 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129420261","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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