Sökning: "Permittivitet"

Visar resultat 11 - 13 av 13 uppsatser innehållade ordet Permittivitet.

  1. 11. 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

  3. 12. Effect of Heat Treatment on Morphology and Dielectric Properties of Polyethylene

    Master-uppsats, KTH/Elektroteknisk teori och konstruktion

    Författare :Md Tanbhir Hoq; [2014]
    Nyckelord :Polyethylene; Morphology; Annealing; Sample Swelling; Dielectric Spectroscopy; Differential Scanning Calorimetry; Crystallinity; heat Treatment; Power Cable; High Voltage; Permittivity; Polyeten; Morfologi; Anlöpning; Svällning; Dielektrisk spektroskopi; Differentiell svepkalorimetri; Kristallinitet; Värmebehandling; Kraftkabel; Högspänning; Permittivitet;

    Sammanfattning : Polyethylene is used extensively as an insulating material in high voltage power cables, it is therefore important to understand the behaviour of polyethylene under different conditions. This is a study regarding the relation of heat treatment and the effect of morphological changes on the dielectric properties of polyethylene samples. LÄS MER

  4. 13. On long-range and high frequency propagation alongparallel strip conductors in layered media : A simplified yet accurate method using the mode matching technique in the spectral domain

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

    Författare :Benjamin Oakes; [2013]
    Nyckelord :;

    Sammanfattning : Electrical arcing in the railway environment radiates wideband noise that can disturb nearbysensitive electronics e.g. signaling systems. High frequency disturbances follow conducting wiresand rails. LÄS MER