Exploració per tema "Rotors"

Ara es mostren els items 21-40 de 41

    • General analysis of the three-phase asynchronous motor with spiral sheet rotor: operation, parameters and characteristic values 

      Mujal-Rosas, Ramon Maria; Orrit Prat, Jordi (2010-06-10)
      Article
      Accés obert
      The objectives of this article arise through the investigation of a motor with a high starting torque although with limited intensities, weak intensity variations depending on the load, controlled losses in no-load ...

    • Improvements in direct torque control of induction motors 

      Arias Pujol, Antoni (Universitat Politècnica de Catalunya, 2001-03-01)
      Tesi
      Accés obert
      This thesis is mainly devoted to the investigation of speed control methods for three phase cage induction motors with particular emphasis being given to Direct Torque Control (DTC) improved techniques.<br/>Classical Direct ...

    • Induction motor with spiral sheet rotor 

      Mujal-Rosas, Ramon Maria; Boix Aragonès, Oriol; Colom Fajula, Xavier (2009)
      Comunicació de congrés
      Accés obert
      mprovements in torque at low currents using a rotor with spiral sheets are analyzed. Several rotors and stators have been built combining different constructive and mechanical characteristics of the related elements : ...

    • Induction motor with spiral sheet rotor 

      Mujal-Rosas, Ramon Maria; Boix Aragonès, Oriol; Colom Fajula, Xavier (2009)
      Comunicació de congrés
      Accés obert
      mprovements in torque at low currents using a rotor with spiral sheets are analyzed. Several rotors and stators have been built combining different constructive and mechanical characteristics of the related elements : ...

    • LPV Control of a Quadrotor 

      Torren Larroya, Abel (Universitat Politècnica de Catalunya, 2015-03)
      Projecte Final de Màster Oficial
      Accés obert
      This master thesis addresses the LPV control of a quadrotor system. The quadorotor model is first transformed to a LPV model respresentation starting from the nonlinear physical model. Then, using the LPV gain-scheduling ...

    • Motion intention optimization for multirotor robust video stabilization 

      Aguilar, Wilbert G.; Angulo Bahón, Cecilio; Pardo, Jorge A. (IEEE Press, 2017)
      Text en actes de congrés
      Accés obert
      In this paper we present an optimization algorithm for simultaneously detecting video freeze and obtaining the minimum number of the frame required in motion intention estimation for real time robust video stabilization ...

    • Nonlinear Model Predictive Control of a Quadrotor 

      Melgarejo Hernández, Emilio (Universitat Politècnica de Catalunya, 2016-09-05)
      Projecte Final de Màster Oficial
      Accés obert
      One of the most important features of a quadrotor in order to properly work, generally in some sort of path tracking, is to have a suitable control. This thesis will approach the problem of controlling a quadrotor applying ...

    • Nuevas aportaciones al motor eléctrico de flujo axial con rotor conductor sin material ferromagnético 

      López López, José (Universitat Politècnica de Catalunya, 2000-12-20)
      Tesi
      Accés obert
      En la tesis, se estudian máquinas eléctricas de flujo axial con rotor conductor sin elementos ferromagnéticos. Se pretende construir un motor de flujo axial, que se alimente con densidades de corriente elevadas para arrastrar ...

    • Online parameter estimation in Twin Rotor device 

      Antolinez Jimenez, Koldo (Universitat Politècnica de Catalunya, 2021-11-01)
      Projecte Final de Màster Oficial
      Accés obert
      In most control designs, it is presumed that a precise model of the system to be controlled is known; however, most of the time these parameters are an approximation of the real values. This approximation is due to di ...

    • PMSM drive position estimation: contribution to the high-frequency injection voltage selection issue 

      Medjmadj, Slimane; Diallo, Demba; Mostefai, Mohammed Amine; Delpha, Claude; Arias Pujol, Antoni (2015-03-01)
      Article
      Accés obert
      High-frequency injection (HFI) is an alternative method to estimate permanent magnet synchronous motor (PMSM) rotor position using magnetic saliency. Once the maximum fundamental electrical frequency and the power converter ...

    • Predictive control of wind farms based on lexicographic minimizers for power reserve maximization 

      Siniscalchi Minna, Sara; Bianchi, Fernando Daniel; Ocampo-Martínez, Carlos (2018)
      Text en actes de congrés
      Accés obert
      This paper presents a model predictive control (MPC) strategy aimed to regulate the total power delivered to the grid while maximizing the power reserve. Nowadays, the high participation of wind energy in the electricity ...

    • Quasi-LPV modelling and non-linear identification of a twin rotor system 

      Nejjari Akhi-Elarab, Fatiha; Rotondo, Damiano; Puig Cayuela, Vicenç; Innocenti, Mario (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper describes the experimental identifi- cation of the parameters of the Twin Rotor MIMO System (TRMS) non-linear model using data collected from the real lab set-up. From this non-linear model, ...

    • Reduced saliency PMSM V/f sensorless control with initial rotor position estimation 

      Sala Pérez, Pau; Heaxts Aragonès, Marc; Galceran Arellano, Samuel; Montesinos Miracle, Daniel (2014-03)
      Article
      Accés restringit per política de l'editorial
      An initial rotor position estimation method without any position sensor for reduced saliency PMSM is presented. The algorithm is used in combination with a stabilized scalar control. An oscillating high-frequency voltage ...

    • Response of a Discontinuously Non-linear System 

      Aguilar Mayans, Joan (Universitat Politècnica de Catalunya / University of Aberdeen, 2009)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      Rotor systems with clearances can exhibit chaotic (random-like) motion. Previous work has shown that the embedding space method and correlation dimension estimation can be used to give an indication of the clearance. However ...

    • Rotor spinning transfer channel design optimization via computational fluid dynamics 

      Huiting, Lin; Bergadà Granyó, Josep Maria; Yongchun, Zeng; Nicholus T, Akankwasa; Yuze, Zhang; Jun, Wang (2018-06-01)
      Article
      Accés obert
      The conventional rotor spinning unit generates flow vortices in the transfer channel upstream region which affect the fiber configuration and consequently yarn properties. Geometry and spinning parameters such as transfer ...

    • Study of solutions to mitigate the vibrations generated by the vertical rotors of a VTOL drone 

      Morante Torra, David (Universitat Politècnica de Catalunya, 2021-06-22)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      L’objectiu d’aquest treball de fi de grau ha estat estudiar solucions per mitigar l’impacte de les vibracions generades pels rotors verticals en un prototip de drone VTOL encara en fase de disseny. Aquest model pertany a ...

    • Study of the modelling and identification of an AscTec Hummingbird multirotor 

      Cabeza Doña, Antonio (Universitat Politècnica de Catalunya, 2014-06-12)
      Treball Final de Grau
      Accés obert
      Revisió de l'estat de l'art en models de quadrirotors. Modelat teòric de l'aeronau. Disseny d'experiments per identificar paràmetres. Realització d'experiments i identificació de paràmetres. Creació del simulador i la seva ...

    • Suborbital autorotation landing demonstrator on REXUS 29 

      Mehringer, Johanna; Werner, Lennart; Riegler, Clemens; Dunschen, Frederik (Universitat Politècnica de Catalunya, 2022-04-29)
      Comunicació de congrés
      Accés obert
      Current developments in the aerospace industry point towards more frequent interplanetary travel in the future. However, the main focus of developments is on launcher technology, yet the descent of interplanetary probes ...

    • Three-phase induction motor with spiral sheet rotor 

      Mujal-Rosas, Ramon Maria; Boix Aragonès, Oriol; Marín Genescá, Marcos (Library of Congress: 2007936380, 2008)
      Comunicació de congrés
      Accés obert
      Improvements on the torque with low currents using rotor with spiral sheets are analyzed. Several rotors and stators have been built combining different constructive and mechanical characteristics of the related elements: ...

    • Time-domain computation of rotational iron losses considering the bulk conductivity for PMSMs 

      Asef, Pedram; Bargalló Perpiñá, Ramón; Lapthorn, Andrew (2019-06-01)
      Article
      Accés restringit per política de l'editorial
      This study investigates an advanced finite-element (FE) technique for the evaluation of rotational iron losses basedon a time-domain computation, where the bulk conductivity of the core materials is considered. The iron-loss ...