An educational tool to assist the design process of switched reluctance machines

The design of electric machines is a hot topic in the syllabuses of several undergraduate and graduate courses. With the development of hybrid and electrical vehicles, this subject is gaining more popularity, especially in electrical engineering courses. This paper presents a computeraided educational tool to guide engineering students in the design process of a switched reluctance machine (SRM). A step-by-step design procedure is detailed and a user guide interface (GUI) programmed in the Matlab® environment developed for this purpose is shown. This GUI has been proved a useful tool to help the students to validate the results obtained in their lecture assignments, while aiding to achieve a better understanding of the design process of electric machines. A validation of the educational tool is done by means of finite element method (FEM) simulations.Postprint (author's final draft

Optimization of modular wiring harnesses by means of regression models for temperature prediction of wire bundles

Automotive wiring harnesses have become heavier and more complex due to their increasing number of electrical components. It is now desired to reduce their mass of copper. For this purpose, experimentation can be partially replaced by simulation, but it is still impossible to exhaustively simulate all of the combinations of modular wiring harness. This proposed approach consists of carrying out simulations using the FEM method and using their results to create regression models. Polynomial formulae can give the same information as simulations within a clearly reduced time and satisfying accuracy. An optimization algorithm introduced in this study will use them to assign new cable cross-sections of harnesses considering their currents and the ambient temperature.Postprint (author's final draft

Custom integer optimization method for wire bundle dimensioning

Automotive wiring harnesses have gained weight and complexity through the last decades due to the increasing number of electrical components, which has raised the interest on its weight optimization. For this purpose, it is essential to know at least the maximum amount of steady current that either single wires or bundles can carry. However, the large amount of combinations of the customer-speci¿c wire harnesses makes it impossible to exhaustively simulate all of the combinations that would allow for a reliable analysis and optimization of the network. The proposed approach consists of achieving accurate predictions of the wire thermal behaviour using fast on-line polynomial functions, which have been created as regression models using data from off-line worst-case ¿nite element sim- ulations. These regression models provide good accuracy for the critical dimensions of wire bundles in a much shorter time than simulations, so that they can be used on-line in optimiza- tion algorithms. Two different approaches of optimization are presented here in order to assign discrete values of available wire cross-section to the wire bundles: The ¿rst one uses integer linear programming, and the second one consists of a recently created custom algorithm whose objective is to reduce the computation time of the integer linear programming approach. This latter objective is satisfactorily accomplished. Results of both optimization approaches are validated by means of ¿nal ¿nite element simulations, and they promisingly ful¿ll the objectives of this study.Peer ReviewedPostprint (author's final draft

Water-pumping permanent magnet synchronous motor optimization based on customized torque-speed operating area and performance characteristics

© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other worksThis paper presents a novel methodology for optimizing Permanent Magnet Synchronous Motors for Water-Pumping applications. The algorithm is designed to start the optimization process from a predefined torque-speed area, its desired envelope, and the performance characteristics of the motor to be obtained after the optimization process, providing the information in an efficiency map, according to a predefined control strategy (MTPA, MTPV, etc.). This work also implements an image comparison technique based on the structural similarity index to evaluate the objective function.Peer ReviewedPostprint (author's final draft

A new auto-provisioned squat-based traffic management strategy for multiclass networks

In search of being able to offer better quality of service (QoS) in multiclass networks, a strategy that aims to allow resources between different classes of service (CoS) to be shared according to the class’s needs and priority is proposed. The goal is to achieve an optimal use of the total bandwidth in a link. This paper presents shortly the proposed strategy and explains the “squatting” and “kicking” mechanisms. A model and simple results for performance to prove their utility are shown.Postprint (published version

“ANESTESIA CON BLOQUEO SUBARACNOIDEO EN CIRUGIA GENERAL, EN EL HOSPITAL GENERAL DE ACAMBAY, I.S.E.M., 2012”

La técnica anestésica de bloqueo subaracnoideo con anestésicos locales hoy en día es un procedimiento fiable con singular eficacia y eficiencia en anestesia y analgesia para aquellos pacientes que serán sometidos a una intervención quirúrgica, con múltiples ventajas en los pacientes que tienen como primera de elección dicho procedimiento y si de alguna manera no se tiene la respuesta esperada tenemos como alternativa el poder cambiar de técnica de anestesia o analgesia

Detection of inter-turn faults in multi-phase ferrite-PM assisted synchronous reluctance machine

Inter-turn winding faults in five-phase ferrite-permanent magnet-assisted synchronous reluctance motors (fPMa-SynRMs) can lead to catastrophic consequences if not detected in a timely manner, since they can quickly progress into more severe short-circuit faults, such as coil-to-coil, phase-to-ground or phase-to-phase faults. This paper analyzes the feasibility of detecting such harmful faults in their early stage, with only one short-circuited turn, since there is a lack of works related to this topic in multi-phase fPMa-SynRMs. Two methods are tested for this purpose, the analysis of the spectral content of the zero-sequence voltage component (ZSVC) and the analysis of the stator current spectra, also known as motor current signature analysis (MCSA), which is a well-known fault diagnosis method. This paper compares the performance and sensitivity of both methods under different operating conditions. It is proven that inter-turn faults can be detected in the early stage, with the ZSVC providing more sensitivity than the MCSA method. It is also proven that the working conditions have little effect on the sensitivity of both methods. To conclude, this paper proposes two inter-turn fault indicators and the threshold values to detect such faults in the early stage, which are calculated from the spectral information of the ZSVC and the line currentsPeer ReviewedPostprint (published version

Multiple Hashing Integration for Real-Time Large Scale Part-to-Part Video Matching

A real-time large scale part-to-part video matching algorithm, based on the cross correlation of the intensity of motion curves, is proposed with a view to originality recognition, video database cleansing, copyright enforcement, video tagging or video result re-ranking. Moreover, it is suggested how the most representative hashes and distance functions - strada, discrete cosine transformation, Marr-Hildreth and radial - should be integrated in order for the matching algorithm to be invariant against blur, compression and rotation distortions: (R; _) 2 [1; 20]_[1; 8], from 512_512 to 32_32pixels2 and from 10 to 180_. The DCT hash is invariant against blur and compression up to 64x64 pixels2. Nevertheless, although its performance against rotation is the best, with a success up to 70%, it should be combined with the Marr-Hildreth distance function. With the latter, the image selected by the DCT hash should be at a distance lower than 1.15 times the Marr-Hildreth minimum distance

Implantación del sistema de calidad según norma UNEEN ISO/IEC 17025:2005 en un laboratorio de calibración de fuerza “in-situ” según las normas UNE-EN ISO 7500-1 y UNE-EN 12390-4 anexo B

El objeto principal de este proyecto es implantar un Sistema de Calidad basado en la norma UNEEN ISO/IEC 17025:2005 en la empresa PÁCAM ELECTRÓNICA, S.L. para poder obtener la acreditación que otorga la Entidad Nacional de Acreditaciones (ENAC) como laboratorio de calibración “In situ” en máquinas de ensayos de fuerza uniaxiales en sentido de compresión según los requisitos de las normas UNE-EN ISO 7500-1 y UNE-EN 12390-4 Anexo B. Este proyecto es valido para cualquier titulación de ingeniería ya que actualmente en todos los enfoques industriales son necesarias las implantaciones de sistemas de calidad tanto generales a nivel de gestión (UNE-EN ISO 9001) como cualquier sistema técnico de control, ya sea de sistemas de fuerza en este proyecto, como eléctricos, químicos, electrónicos, informáticos, telecomunicaciones, etc. Las máquinas de fuerza uniaxiales a inspeccionar son laboratorios de calidad acreditados por los diferentes organismos provinciales o regionales, así como laboratorios de calidad interna de las empresas de fabricación de los productos. El Sistema de Calidad constará de la siguiente documentación en base a las normas anteriormente mencionadas: • Manual de Calidad en los que se establecerán y definirán políticas, enfoques y responsabilidades. • Manuales de Procedimientos Generales que complementan al Manual de Calidad e instrucciones técnicas en las que se detallarán claramente todas las operaciones necesarias para cada tipo de inspección. • Documentos e Informes

Implantación del sistema de calidad según norma UNEEN ISO/IEC 17025:2005 en un laboratorio de calibración de fuerza “in-situ” según las normas UNE-EN ISO 7500-1 y UNE-EN 12390-4 anexo B

El objeto principal de este proyecto es implantar un Sistema de Calidad basado en la norma UNEEN ISO/IEC 17025:2005 en la empresa PÁCAM ELECTRÓNICA, S.L. para poder obtener la acreditación que otorga la Entidad Nacional de Acreditaciones (ENAC) como laboratorio de calibración “In situ” en máquinas de ensayos de fuerza uniaxiales en sentido de compresión según los requisitos de las normas UNE-EN ISO 7500-1 y UNE-EN 12390-4 Anexo B. Este proyecto es valido para cualquier titulación de ingeniería ya que actualmente en todos los enfoques industriales son necesarias las implantaciones de sistemas de calidad tanto generales a nivel de gestión (UNE-EN ISO 9001) como cualquier sistema técnico de control, ya sea de sistemas de fuerza en este proyecto, como eléctricos, químicos, electrónicos, informáticos, telecomunicaciones, etc. Las máquinas de fuerza uniaxiales a inspeccionar son laboratorios de calidad acreditados por los diferentes organismos provinciales o regionales, así como laboratorios de calidad interna de las empresas de fabricación de los productos. El Sistema de Calidad constará de la siguiente documentación en base a las normas anteriormente mencionadas: • Manual de Calidad en los que se establecerán y definirán políticas, enfoques y responsabilidades. • Manuales de Procedimientos Generales que complementan al Manual de Calidad e instrucciones técnicas en las que se detallarán claramente todas las operaciones necesarias para cada tipo de inspección. • Documentos e Informes