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6 results on '"Alstom Transport SA"'

1. Power Transformer Model in Railway Applications Based on Bond Graph and Parameter Identification

Author

Saba Amirdehi, Paul-Etienne Vidal, Johana Vally, Baptiste Trajin, Didier Colin, Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), ALSTOM Transport (FRANCE), Laboratoire Génie de Production - LGP (Tarbes, France), Alstom Transport SA, ALSTOM, Laboratoire Génie de Production (LGP), and Ecole Nationale d'Ingénieurs de Tarbes

Subjects
Test bench, Computer science, Energy Engineering and Power Technology, Transportation, 01 natural sciences, Power transformer simulation, law.invention, System model, law, Control theory, 0103 physical sciences, Electronique, Electrical and Electronic Engineering, Transformer, Parameters identification, Hysteresis cycle, 010302 applied physics, Estimation theory, 010401 analytical chemistry, Traction chain, Experimental data, Modélisation et simulation, [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation, Magnetic flux, [SPI.TRON]Engineering Sciences [physics]/Electronics, 0104 chemical sciences, Nonlinear system, Automotive Engineering, Bond graph
Abstract

International audience; Validation and verification are the most important issues in railway applications due to cost and security reasons. Therefore, having a model of the system would be necessary in this case. Due to non-ideal test conditions in industrial applications, an accurate parameter identification process has to be defined. In this paper, bond graph method is used to model energy exchanges within components of a traction chain. More precisely, the non-linear transformer model and its parameter identification is studied. In the case of non-ideal test conditions, the usual Jiles-Atherton parameter identification procedure can not be performed. Regarding state of the art, the Jiles-Atherton parameter identification is discussed. It is highlighted that an uncomplete hysteresis cycle, including extremum point and coercive field are mandatory for an accurate parameter identification. The proposed identification process is applied to a real application case. The obtained parameters are then inserted into the overall system model. The consecutive simulations are compared to experimental data obtained through traction chain test bench.

Published
2020

2. CaCu3Ti4O12 ceramics from co-precipitation method: Dielectric properties of pellets and thick films

Author

Fabrice Rossignol, Céline Combettes, Emmanuel Dutarde, Sophie Guillemet-Fritsch, Axel Rumeau, Bertrand Barbier, Thierry Chartier, Thierry Lebey, Université de Limoges - UNILIM (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), ALSTOM Transport (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Ecole Nationale Supérieure de Céramique Industrielle - ENSCI (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Alstom Transport SA, ALSTOM, Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC), Axe 1 : procédés céramiques, Science des Procédés Céramiques et de Traitements de Surface (SPCTS), Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Matériaux Diélectriques dans la Conversion d’Energie (LAPLACE-MDCE), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)

Subjects
Materials science, Matériaux, Pellets, CaCu3Ti4O12, Relative permittivity, 02 engineering and technology, Dielectric, Tape casting, 01 natural sciences, law.invention, Barrier layer, [SPI]Engineering Sciences [physics], law, 0103 physical sciences, Materials Chemistry, Ceramic, Composite material, Films, 010302 applied physics, Powders-chemical preparation, 021001 nanoscience & nanotechnology, Grain size, Capacitor, visual_art, Dielectric properties, Ceramics and Composites, visual_art.visual_art_medium, Dielectric loss, 0210 nano-technology
Abstract

International audience; Dielectric properties of CaCu3Ti4O12 (CCTO)-based ceramics and thick films (e ∼50m) prepared from powders synthesized by a soft chemistry method (co-precipitation) are presented and discussed. The characteristics of pellets and thick films are compared. The pellets exhibit high values of the dielectric permittivity (εr ∼1.4×105) and relatively small dielectric losses (tan δ ∼0.16) at 1 kHz and room temperature. These properties are independent of the nature of the metallization of the electrodes. In addition, the dielectric permittivity decreases when the diameter of the electrodes of the pellets increases, while the losses remain constant. This result, which is strongly related to the nature of the dielectric material in between the electrodes, constitutes a strong indication that the high dielectric permittivity values observed in this material are not related to an interfacial (electrode material) related mechanism but is an internal barrier layer capacitor (IBLC) type. Very high values of the dielectric permittivity of CCTO thick films are measured (εr ∼5×104). The differences in dielectric permittivity between thick films and dense pellets may be attributed to the difference in grain size due to different CuO contents, and to the different reactivity of the materials.

Published
2009

3. Elaboration and Characterization of Multilayer Ceramic Capacitors Based on High Permittivity CaCu3Ti4O12

Author

Barbier, B., Combettes, Céline, Guillemet-Fritsch, S., Chartier, T., Rossignol, F., Rumeau, Axel, Lebey, Thierry, Dutarde, E., Gestion de l'Eau, Acteurs, Usages (UMR G-EAU), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-AgroParisTech-Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF)-Institut de Recherche pour le Développement (IRD [France-Sud])-Centre International de Hautes Etudes Agronomiques Méditerranéennes - Institut Agronomique Méditerranéen de Montpellier (CIHEAM-IAMM), Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM)-Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM), Département Environnements et Sociétés (Cirad-ES), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Laboratoire d'Electrodynamique des Matériaux Avancés (LEMA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS), Clinique Vétérinaire de Grosbois, Matériaux Diélectriques dans la Conversion d’Energie (LAPLACE-MDCE), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Alstom Transport SA, and ALSTOM

Subjects
[SPI.NRJ]Engineering Sciences [physics]/Electric power
Abstract

International audience

Published
2008

4. Contribution to the stress grading in integrated power modules

Author

E. Dutarde, Thierry Lebey, S. Dagdag, Cyrille Duchesne, Michel Mermet-Guyennet, CIRTEM (CIRTEM), LAboratoire PLasma et Conversion d'Energie (LAPLACE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Laboratoire de génie électrique de Toulouse (LGET), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Matériaux Diélectriques dans la Conversion d’Energie (LAPLACE-MDCE), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Alstom Transport SA, and ALSTOM

Subjects
Engineering, business.industry, [SPI.NRJ]Engineering Sciences [physics]/Electric power, Electronic packaging, Automotive engineering, Power (physics), Reliability (semiconductor), Power module, Power electronics, Electronic engineering, Gradation, Electronics packaging, business, Voltage, Power density
Abstract

International audience; Power electronics packaging, like integrated power modules, constitute an advanced technology leading to power density increase, weight and volume decrease and enhancing the reliability level. However, the continuous increase of the voltage lead to questions regarding power device environment. We discuss in the following different solutions able to achieve the electric stress gradation.

Published
2007

5. A few discussion on expert system development for electrical power systems-optimization of an inverter-motor of a railway traction chain

Author

Hubert Piquet, Djamel Fezzani, Henri Foch, Philippe Nogaret, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), ALSTOM Transport (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Laboratoire électrotechnique et électronique industrielle (LEEI), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Alstom Transport SA, and ALSTOM

Subjects
Energie électrique, business.product_category, Design, Workstation, Computer science, Process (engineering), Machine, computer.software_genre, law.invention, Electric power system, law, Computer Aided Design, Instrumentation, Expert system, Electric machine, Power converters, [SPI.NRJ]Engineering Sciences [physics]/Electric power, Control engineering, Converters, Condensed Matter Physics, Knowledge acquisition, Electronic, Optical and Magnetic Materials, Railways, business, computer
Abstract

International audience; This paper deals with the automatic design of static converters and electrical machines. Facing the multitude of such devices (converters-machines), the choice of the appropriate converter or machine is a delicate problem. A high level of expertise is required to determine the best structure for the considered application. This choice could be rapidly made if one had a system which incorporates a great knowledge of converters, machines and control methods. Firstly, the authors review the realized studies, then they propose this methodology for a concrete case in order to optimize an inverter-motor of a railway traction chain. Constraints are described in terms of input and output performances (losses, current, ...). These data are analyzed by using design rules and methods which allow the decrease of the manufacture cost of the inverter-motor. Rules and methods are implemented on a workstation by means of an "expert system shell" Smeci . The article proposes several tracks which involve organization, methodology, confirmation and implementation of a tool supporting a method. This process of implementation is the most efficient to fit into a constant process of improvement which is supported by the return on experience and by the evolution of the state of the art.

Published
1998

6. Characterization of particulate matter emissions in urban train braking - An investigation of braking conditions influence on a reduced-scale device.

Author

Octau C, Meresse D, Watremez M, Schiffler J, Lippert M, Keirsbulck L, and Dubar L

Subjects
Environmental Monitoring, Particle Size, Temperature, Vehicle Emissions analysis, Air Pollutants analysis, Particulate Matter analysis
Abstract

The particulate matter emissions related to the braking of railway rolling stock are investigated using a reduced scale braking device. Samples of organic materials and cast iron discs are tested for different nominal contact pressures and disc surface temperatures, representative of real conditions. The aim of this work is to investigate the influence of braking conditions on the global amount of particles emitted, their distribution in number and size, and their morphological and chemical characteristics. To be representative, the tested conditions are designed to dissipate the same amount of energy for all the braking events by adjusting the pad application duration. The results show that for the same dissipated energy, a temperature increase above a transition value in the range of 230-280 ∘ C depending on the braking conditions modifies the size and number distributions of the generated particles. The results obtained are of interest to better represent their propagation through CFD modelling according to the characteristic of the particle emission.

Published
2020
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