Sökning: "luftgap"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet luftgap.

  1. 1. Modelling of air-gap harmonic torques and its impact on vibrations in electric drivetrains : Modelling interaction between electromagnetics and vibration of an electrical machine

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Dhiyanesh Radhakrishnan; [2021]
    Nyckelord :Electro-Magnetics; Eigenfrequency; Electrical Machine; Multi-Body Dynamics; Displacement; machine vibrations; Elektromagnetik; Eigen frekvens; Elektrisk maskin; Flerkropps dynamik; Förskjutning; maskin vibrationer;

    Sammanfattning : In this report, the effect of external torque injection of a particular phase and frequency was analyzed using an induction motor assembly consisting of a prototype of an induction motor and a flexible mounting arrangement. The eigenfrequencies of the several components that make up the construction of the induction machine assembly are found out both by analytical and FEM methods. LÄS MER

  3. 2. Consequences of Magnetic Properties in Stainless Steel for a High-efficiency Wave Power Generator

    Kandidat-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Mohamed Sheikh Abdi; Yosef Gebresilassie; [2018]
    Nyckelord :stainless steel; wave power; permeability;

    Sammanfattning : A new kind of wave power generator is being developed at KTH Royal Institute of Technology which potentially can reach an efficiency of 98 %. However, this generator’s small air gap sets strict requirements on the stiffness of the structure to withstand the large magnetic forces. The structure, therefore, need to be both stiff and non-magnetic. LÄS MER

  4. 3. Design of Power Off Brake : Utveckling av testutrustning

    M1-uppsats, Högskolan i Jönköping/JTH, Produktutveckling

    Författare :Simon Berglund; Joel Lennartsson; [2018]
    Nyckelord :elektromagnetisk; broms; testrigg; testutrustning;

    Sammanfattning : The goal with this thesis is to find together with Saab Avionics Systems the correlation between applied current, air gap and forces that a brake with an electromagnetic release function have. This is achieved through theoretical calculations and practical tests. LÄS MER

  5. 4. Eddy Current Losses in the Vicinity of Reactor Air Gaps due to Fringing Flux

    Master-uppsats, KTH/Skolan för elektro- och systemteknik (EES)

    Författare :Valdemar Stenlund; [2016]
    Nyckelord :;

    Sammanfattning : The objective of this report is to investigate the fringing flux around the air gap of a high frequency reactor and what correlation it has with losses, air gap length and frequency. A computer model is made using a finite element analysis software and a prototype reactor is built and tested on to verify the model. LÄS MER

  7. 5. The Effect of Partial Discharge Aging on the Dielectric Response of Polymers

    Uppsats för yrkesexamina på avancerad nivå, KTH/Elektroteknisk teori och konstruktion

    Författare :David Bergman; [2014]
    Nyckelord :;

    Sammanfattning : This work investigated the effect of partial discharges (PD) on the complex permittivity of PVC, PC, PTFE, PE and PA6. The material samples were subjected to prolonged PD activity and the complex permittivity of the material was measured by dielectric spectroscopy (DS) before and after the sample was aged. LÄS MER