Sökning: "Dielektrisk spektroskopi"

Hittade 3 uppsatser innehållade orden Dielektrisk spektroskopi.

  1. 1. 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. 2. 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. 3. Conductivity measurement on thick insulating plaque samples

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

    Författare :Pierre Huldén; [2014]
    Nyckelord :Conductivity; XLPE; leakage current; polarisation; high-voltage; ICE 60093; ASTM;

    Sammanfattning :   The conductivity is one of the main properties of HVDC cable insulation materials and needs to be evaluated carefully. Since measurement on cables is time consuming, often thin specimens and normal conductivity measurement cells are used to compare the materials. LÄS MER