Pub Date : 2014-06-18DOI: 10.1109/SPEEDAM.2014.6872020
G. Palmieri, F. Vasca, R. Frasca, P. Marino
In this paper a state feedback control strategy for supercapacitors used in energy storage systems of railway vehicles is proposed. The control goal consists of guaranteing good performance in transient and steady state operating conditions, also in the presence of line voltage and motor current variations. Numerical results on a realistic example show the effectiveness of the proposed control strategy, also for missing line contact scenarios.
{"title":"Control of supercapacitor storage system in energy efficient railway vehicles","authors":"G. Palmieri, F. Vasca, R. Frasca, P. Marino","doi":"10.1109/SPEEDAM.2014.6872020","DOIUrl":"https://doi.org/10.1109/SPEEDAM.2014.6872020","url":null,"abstract":"In this paper a state feedback control strategy for supercapacitors used in energy storage systems of railway vehicles is proposed. The control goal consists of guaranteing good performance in transient and steady state operating conditions, also in the presence of line voltage and motor current variations. Numerical results on a realistic example show the effectiveness of the proposed control strategy, also for missing line contact scenarios.","PeriodicalId":344918,"journal":{"name":"2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"357 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132872622","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 : 2014-06-18DOI: 10.1109/SPEEDAM.2014.6871974
L. Castellini, M. D'Andrea, N. Borgarelli
This paper describes the analysis and design of an Electromechanical Actuator (EMA) that have been developed to open and close a gate valve for oil and gas applications. The rotating permanent magnet (PM) synchronous motor is integrated with the mechanical components in a rotating-ball nut architecture to minimize the total length and envelope of the actuator. The motion trajectory fits the classical profile, with high-torque at low-speed which is typical for gate valve operation. A comprehensive design methodology, which embraces both the electromagnetic and mechanical design, is described. Nonlinear electromagnetic and structural finite-element analysis methods are employed to aid in the final design process. A prototype has been manufactured utilizing the design data of the optimization procedure. Test results confirm our hypothesis and calculations for the performance of the system.
{"title":"Analysis and design of electro-mechanical actuator for gate valve in oil&gas applications","authors":"L. Castellini, M. D'Andrea, N. Borgarelli","doi":"10.1109/SPEEDAM.2014.6871974","DOIUrl":"https://doi.org/10.1109/SPEEDAM.2014.6871974","url":null,"abstract":"This paper describes the analysis and design of an Electromechanical Actuator (EMA) that have been developed to open and close a gate valve for oil and gas applications. The rotating permanent magnet (PM) synchronous motor is integrated with the mechanical components in a rotating-ball nut architecture to minimize the total length and envelope of the actuator. The motion trajectory fits the classical profile, with high-torque at low-speed which is typical for gate valve operation. A comprehensive design methodology, which embraces both the electromagnetic and mechanical design, is described. Nonlinear electromagnetic and structural finite-element analysis methods are employed to aid in the final design process. A prototype has been manufactured utilizing the design data of the optimization procedure. Test results confirm our hypothesis and calculations for the performance of the system.","PeriodicalId":344918,"journal":{"name":"2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129434882","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 : 2014-06-18DOI: 10.1109/SPEEDAM.2014.6872065
O. Cornea, E. Guran, N. Muntean, D. Hulea
This paper proposes a bi-directional DC-DC converter used as interface between the battery stack and the DC bus in a microgrid application, highlighting its main feature that permits a large conversion rate, with a low number of semiconductors and without using transformers. Analytical descriptions, design aspects, digital simulation and preliminary experimental results are presented, in order to check its operation in both power flow modes, emphasizing the transition between step-up and step-down regimes. It is proved that a simple hysteresis controller is able to assure the stability and a smooth transition between battery charging and discharging modes. The transistors driving signals are complementary which gives the advantage of using a single PWM control.
{"title":"Bi-directional hybrid DC-DC converter with large conversion ratio for microgrid DC busses interface","authors":"O. Cornea, E. Guran, N. Muntean, D. Hulea","doi":"10.1109/SPEEDAM.2014.6872065","DOIUrl":"https://doi.org/10.1109/SPEEDAM.2014.6872065","url":null,"abstract":"This paper proposes a bi-directional DC-DC converter used as interface between the battery stack and the DC bus in a microgrid application, highlighting its main feature that permits a large conversion rate, with a low number of semiconductors and without using transformers. Analytical descriptions, design aspects, digital simulation and preliminary experimental results are presented, in order to check its operation in both power flow modes, emphasizing the transition between step-up and step-down regimes. It is proved that a simple hysteresis controller is able to assure the stability and a smooth transition between battery charging and discharging modes. The transistors driving signals are complementary which gives the advantage of using a single PWM control.","PeriodicalId":344918,"journal":{"name":"2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133151251","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 : 2014-06-18DOI: 10.1109/SPEEDAM.2014.6871982
B. de Vivo, P. Lamberti, R. Raimo, V. Tucci, C. Petrarca
In Adjustable Speed Drives (ASDs) for industrial and traction applications the pulse width modulation (PWM) inverters may produce a shaft voltage due to the capacitive couplings between the windings and the rotor and between the rotor and the stator. Such shaft voltage may be so intense to generate breakdown of the lubricating film in the motor bearings and the associated impulsive currents damage the bearing elements thus affecting the overall ASD reliability. In order to analyze these phenomena and carry out appropriate system design, suitable numerical models are needed which accurately take into account the effects of electromagnetic wave propagation and reflection and the frequency-dependent distributed losses in the system. For this purpose, by means of a model based on a lossy multiconductor transmission lines (MTLs) approach previously developed, the prediction of the voltages and currents at critical sections of a full stator winding (of the wound type) of a three phase high power traction motor is carried out. The MTL model is studied in the time-domain by using the telegraphers' equation system with suitable boundary conditions. The phase voltage at the input terminals of the motor and the voltage across the two bearings are calculated. Moreover, the simulated input voltages are shown to be in good agreement with those obtained by measurements on a real traction drive.
{"title":"Evaluation of the bearing voltage and the overshoot phase voltage in PWM inverter-fed by means of a multiconductor transmission line model","authors":"B. de Vivo, P. Lamberti, R. Raimo, V. Tucci, C. Petrarca","doi":"10.1109/SPEEDAM.2014.6871982","DOIUrl":"https://doi.org/10.1109/SPEEDAM.2014.6871982","url":null,"abstract":"In Adjustable Speed Drives (ASDs) for industrial and traction applications the pulse width modulation (PWM) inverters may produce a shaft voltage due to the capacitive couplings between the windings and the rotor and between the rotor and the stator. Such shaft voltage may be so intense to generate breakdown of the lubricating film in the motor bearings and the associated impulsive currents damage the bearing elements thus affecting the overall ASD reliability. In order to analyze these phenomena and carry out appropriate system design, suitable numerical models are needed which accurately take into account the effects of electromagnetic wave propagation and reflection and the frequency-dependent distributed losses in the system. For this purpose, by means of a model based on a lossy multiconductor transmission lines (MTLs) approach previously developed, the prediction of the voltages and currents at critical sections of a full stator winding (of the wound type) of a three phase high power traction motor is carried out. The MTL model is studied in the time-domain by using the telegraphers' equation system with suitable boundary conditions. The phase voltage at the input terminals of the motor and the voltage across the two bearings are calculated. Moreover, the simulated input voltages are shown to be in good agreement with those obtained by measurements on a real traction drive.","PeriodicalId":344918,"journal":{"name":"2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116272253","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 : 2014-06-18DOI: 10.1109/SPEEDAM.2014.6871931
S. Sadeghi, A. Mohammadpour, L. Parsa
Multi-phase slotless permanent magnet synchronous motors (PMSMs) are cogging torque-free motors with fault tolerant capability developed for high speed applications such as aerospace and marine. Slotless PMSMs can offer a higher torque density when they have a trapezoidal back EMF and supplied with nonsinusoidal current. In this paper, a five-phase slotless PMSM with an external rotor is designed for high torque density. For this purpose, the optimal portions of the time and space harmonic components for producing the highest torque in five-phase PMSMs are calculated mathematically. A closed form analytical model for this motor is then introduced. Based on the analytical model, a multi-objective optimization using genetic algorithm (GA) technique is performed to optimize the motor back EMF waveform and achieve the highest torque density. The detailed finite element analyses are executed to validate the analytical results.
{"title":"Design optimization of a high performance five-phase slotless PMSM","authors":"S. Sadeghi, A. Mohammadpour, L. Parsa","doi":"10.1109/SPEEDAM.2014.6871931","DOIUrl":"https://doi.org/10.1109/SPEEDAM.2014.6871931","url":null,"abstract":"Multi-phase slotless permanent magnet synchronous motors (PMSMs) are cogging torque-free motors with fault tolerant capability developed for high speed applications such as aerospace and marine. Slotless PMSMs can offer a higher torque density when they have a trapezoidal back EMF and supplied with nonsinusoidal current. In this paper, a five-phase slotless PMSM with an external rotor is designed for high torque density. For this purpose, the optimal portions of the time and space harmonic components for producing the highest torque in five-phase PMSMs are calculated mathematically. A closed form analytical model for this motor is then introduced. Based on the analytical model, a multi-objective optimization using genetic algorithm (GA) technique is performed to optimize the motor back EMF waveform and achieve the highest torque density. The detailed finite element analyses are executed to validate the analytical results.","PeriodicalId":344918,"journal":{"name":"2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114771228","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 : 2014-06-18DOI: 10.1109/SPEEDAM.2014.6872032
C. M. Verrelli, S. Pirozzi, P. Tomei, C. Natale
We present the use of [m, m]-Padé approximants in the implementation of repetitive learning controls for the asymptotic link position tracking in robotic manipulators with uncertain dynamics and periodic position reference signals (with known period). The resulting linear learning controllers are described by transfer functions exhibiting all their poles with negative real part. Analyses from both theoretical and experimental points of view are carried out.
{"title":"Padé approximants in linear repetitive learning controls for robotic manipulators","authors":"C. M. Verrelli, S. Pirozzi, P. Tomei, C. Natale","doi":"10.1109/SPEEDAM.2014.6872032","DOIUrl":"https://doi.org/10.1109/SPEEDAM.2014.6872032","url":null,"abstract":"We present the use of [m, m]-Padé approximants in the implementation of repetitive learning controls for the asymptotic link position tracking in robotic manipulators with uncertain dynamics and periodic position reference signals (with known period). The resulting linear learning controllers are described by transfer functions exhibiting all their poles with negative real part. Analyses from both theoretical and experimental points of view are carried out.","PeriodicalId":344918,"journal":{"name":"2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132362488","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 : 2014-06-18DOI: 10.1109/SPEEDAM.2014.6871968
Ž. Ferková, A. Richter
The article deals with modelling of tram DC series motors. The finite element method in 3D and 2D ANSYS / Maxwell program is used. The main objective is to focus on the effects of the electromagnetic imbalances or imperfections that they arise in the maintenance and repair of DC series motors.
{"title":"3D EM modelling of DC traction motors for pairing of motors in tram undercarriages","authors":"Ž. Ferková, A. Richter","doi":"10.1109/SPEEDAM.2014.6871968","DOIUrl":"https://doi.org/10.1109/SPEEDAM.2014.6871968","url":null,"abstract":"The article deals with modelling of tram DC series motors. The finite element method in 3D and 2D ANSYS / Maxwell program is used. The main objective is to focus on the effects of the electromagnetic imbalances or imperfections that they arise in the maintenance and repair of DC series motors.","PeriodicalId":344918,"journal":{"name":"2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134409201","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 : 2014-06-18DOI: 10.1109/SPEEDAM.2014.6872093
A. Monteiro, E. Ribeiro, A. M. Marques Cardoso, C. Boccaletti
This paper proposes a small-scale standalone wind power system for rural and remote areas electrification. The presented system is composed of a wind turbine, a permanent magnet synchronous generator (PMSG), a diode bridge rectifier, two buck converters (one for optimizing the wind power system generation and the other to satisfy load electrical requirements), a battery bank, and a variable load. The analysis is focused on low-cost and effective maximum power point tracking (MPPT) of the wind power system while satisfying the load requirements and ensuring battery protection. Dynamic simulation results of the proposed system validate its suitability for providing reliable power supply under load and wind speed variations in isolated locations.
{"title":"Power control of a small-scale standalone wind turbine for rural and remote areas electrification","authors":"A. Monteiro, E. Ribeiro, A. M. Marques Cardoso, C. Boccaletti","doi":"10.1109/SPEEDAM.2014.6872093","DOIUrl":"https://doi.org/10.1109/SPEEDAM.2014.6872093","url":null,"abstract":"This paper proposes a small-scale standalone wind power system for rural and remote areas electrification. The presented system is composed of a wind turbine, a permanent magnet synchronous generator (PMSG), a diode bridge rectifier, two buck converters (one for optimizing the wind power system generation and the other to satisfy load electrical requirements), a battery bank, and a variable load. The analysis is focused on low-cost and effective maximum power point tracking (MPPT) of the wind power system while satisfying the load requirements and ensuring battery protection. Dynamic simulation results of the proposed system validate its suitability for providing reliable power supply under load and wind speed variations in isolated locations.","PeriodicalId":344918,"journal":{"name":"2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126822318","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 : 2014-06-18DOI: 10.1109/SPEEDAM.2014.6872131
A. Maqsood, K. Corzine
The z-source breaker is a new kind of breaker which is designed specifically for dc power systems. Without a zero crossing, interrupted dc currents produce arcing and hence ac breakers would not be applicable. The z-source breaker resolves this problem because it is designed to turn off as soon as it experiences a sharp transient in current. In this paper a new design for the z-source breaker is considered so that load transients are not identified as faults. The design is also modified to accommodate bi-directionality which is required in mediumvoltage dc ship power systems. A higher-level coordinated control scheme is discussed which enables multiple breakers to coordinate and isolate the fault in a simple medium-voltage dc ship power system architecture with a central control unit.
{"title":"The Z-source breaker for fault protection in ship power systems","authors":"A. Maqsood, K. Corzine","doi":"10.1109/SPEEDAM.2014.6872131","DOIUrl":"https://doi.org/10.1109/SPEEDAM.2014.6872131","url":null,"abstract":"The z-source breaker is a new kind of breaker which is designed specifically for dc power systems. Without a zero crossing, interrupted dc currents produce arcing and hence ac breakers would not be applicable. The z-source breaker resolves this problem because it is designed to turn off as soon as it experiences a sharp transient in current. In this paper a new design for the z-source breaker is considered so that load transients are not identified as faults. The design is also modified to accommodate bi-directionality which is required in mediumvoltage dc ship power systems. A higher-level coordinated control scheme is discussed which enables multiple breakers to coordinate and isolate the fault in a simple medium-voltage dc ship power system architecture with a central control unit.","PeriodicalId":344918,"journal":{"name":"2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116092259","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 : 2014-06-18DOI: 10.1109/SPEEDAM.2014.6872098
M. Pellegrino, G. Graditi, G. Flaminio, V. Giglio, W. Ferrara, A. D. Di Stefano, F. Aleo, P. Pugliatti, G. Gigliucci
The purpose of the test “Performance at low irradiance” is to determine how the electrical performance of the module varies with load at 25°C and at irradiance of 200Wm-2, using natural sunlight or a simulator class BBB or better conforming to the requirements of IEC 60904-9, instead of 1000 Wm-2 standard conditions. A device to change the irradiance to 200Wm-2 is required; its implementation shan't affect the relative spectral irradiance distribution and the spatial uniformity in accordance with IEC 60904-10. To this purpose the IEC 60904-10 recommends the use of mesh filters or neutral density filters. Mesh filters are believed to be the best method for large surfaces. It would be important to compare results and uncertainties related to the different solutions and discuss about pros and cons. This paper matches the results of two laboratories that adopt two different approaches. The low irradiance performance test has gained importance due to the always extensive use of PV as integration elements on buildings.
{"title":"A comparison between two different techniques to estimate the uncertainty of the low irradiance test","authors":"M. Pellegrino, G. Graditi, G. Flaminio, V. Giglio, W. Ferrara, A. D. Di Stefano, F. Aleo, P. Pugliatti, G. Gigliucci","doi":"10.1109/SPEEDAM.2014.6872098","DOIUrl":"https://doi.org/10.1109/SPEEDAM.2014.6872098","url":null,"abstract":"The purpose of the test “Performance at low irradiance” is to determine how the electrical performance of the module varies with load at 25°C and at irradiance of 200Wm-2, using natural sunlight or a simulator class BBB or better conforming to the requirements of IEC 60904-9, instead of 1000 Wm-2 standard conditions. A device to change the irradiance to 200Wm-2 is required; its implementation shan't affect the relative spectral irradiance distribution and the spatial uniformity in accordance with IEC 60904-10. To this purpose the IEC 60904-10 recommends the use of mesh filters or neutral density filters. Mesh filters are believed to be the best method for large surfaces. It would be important to compare results and uncertainties related to the different solutions and discuss about pros and cons. This paper matches the results of two laboratories that adopt two different approaches. The low irradiance performance test has gained importance due to the always extensive use of PV as integration elements on buildings.","PeriodicalId":344918,"journal":{"name":"2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"207 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116425988","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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