Essays about: "rotor current"

Showing result 16 - 20 of 55 essays containing the words rotor current.

  1. 16. Effects of load modelling on Voltage Impasse Regions (VIR)

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Maria Angeles Antolin Linan; [2019]
    Keywords : load models; power system dynamics; quasi-dynamic approach; voltage collapse; Voltage Impasse Regions VIR ; lastmodeller; kraftsystemdynamik; kvasi-dynamisk tillvägagångssätt; spänningskollaps; Voltage Impasse Region VIR ;

    Abstract : Voltage Impasse Region (VIR) is a phenomenon in power systemswhose dynamics are describe by a set of Differential AlgebraicEquations (DAE). VIR denotes a state-space area where voltagecausality is lost, i.e. the Jacobian of the algebraic part of DAEis singular. READ MORE

  3. 17. Implementation and experimental evaluation of a parameterized PMSynRM model using Matlab and Comsol Multiphysics

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Israt Jahan; [2019]
    Keywords : Comsol Multiphysics; eddy-current losses; permanent-magnet synchronous reluctance motors; reluctance; Comsol Multiphysics; virvelströmsförluster; permanentmagnet synkrona reluktansmotorer; reluktans;

    Abstract : This thesis focuses on modelling of the permanent magnet synchronous reluctancemotor (PMSynRM), which has drawn considerable attention by researchers thanks toits high efficiency and wide range of speed operation. Comparisons with measurementsfrom a four-pole PMSynRM with four barriers and 24 stator slots have been carriedout. READ MORE

  4. 18. Thermal modeling of power electronic components in excitation systems

    University essay from

    Author : Fredrik Widberg; [2019]
    Keywords : Excitation systems; Power electronics; Thermal modeling;

    Abstract : This thesis work aims at developing a model in Visual Basic for Applications and Microsoft Excel that can be used to predict temperatures in semiconductor devices for two commercial products made by Voith Hydro AB, and via simulation of the model determine the maximum current that can be conducted through the two products. The two products are called field exciters. READ MORE

  5. 19. Integrated generator for use in aircraft engines

    University essay from Lunds universitet/Institutionen för energivetenskaper

    Author : Fredrik Andersson; [2018]
    Keywords : Integrated generator; aircraft engine; generator; aircraft generator; Technology and Engineering;

    Abstract : In this paper the use of integrated generators for airplane engines is examined. In order to accomplish this goal a combination of MatLab with FEMM and ANSYS Maxwell is used to make incrementally more and more detailed analysis of the integrated generator concept. READ MORE

  6. 20. Field Current Control for the Damping of Rotor Oscillations and for the Alternative Start of Synchronous Machines : Further Innovative Applications of Field Current Active Control besides UMP-Compensation

    University essay from Uppsala universitet/Institutionen för teknikvetenskaper

    Author : Roberto Felicetti; [2018]
    Keywords : asynchronous start; current control; damping bars; damper winding; d-axis; q-axis; hunting; natural frequency; Park s reference frame; rotor back-EMF; rotor oscillations; synchronous motor;

    Abstract : The possibility to save energy in synchronous machines operation by dismissing d-axis damping bars and surrogating them with active excitation current control in sectored field winding is proved. In particular a way to recover the energy of rotor oscillations during power regulation is shown by means of a studycase generator whereas a self-starting machine is analytically and numerically designed in view of its next construction and test. READ MORE