Search for dissertations about: "charge"

Showing result 1 - 5 of 1321 swedish dissertations containing the word charge.

  1. 1. Charge transport in polymer-based insulating materials for high voltage applications: effect of single- and multi-layered structures

    University dissertation from Chalmers University of Technology

    Author : Anh Hoang; Chalmers tekniska högskola.; Chalmers University of Technology.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; charge injection; nanocomposite; charge trapping and de-trapping; polyethylene; DC conductivity; charge transport; charge mobility; enamel insulation; charging current; surface potential decay;

    Abstract : Polymer composites have been widely employed as electrical insulating materials for high voltage components and devices such as power cables, gas-insulated systems, rotating machines, line and post insulators, etc. Such materials are usually made by introducing inorganic oxides (SiO2, TiO2, Al2O3, MgO) into polymeric matrices e.g. READ MORE

  2. 2. Charge Accumulation in Hybrid High Voltage Insulation

    University dissertation from Chalmers University of Technology

    Author : Mats Sjöberg; Chalmers tekniska högskola.; Chalmers University of Technology.; [2003]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; high voltage; hybrid insulation; charge conditioning; charge accumulation; dielectric coating; dielectric barrier; electric field distribution; breakdown strength; dielectric barrier discharge; discharge modelling;

    Abstract : This thesis deals with the novel idea of controlling the electric stress or field distribution in a hybrid air - solid-dielectric high voltage insulation by promoting accumulation of surface charges on the internal interfacial layers in the combined (hybrid) dielectric structure. Primarily, applications are expected to be found in high voltage dc systems and as a method to improve the resistance against insulation failure by overvoltages, e. READ MORE

  3. 3. Theoretical studies of chemical dynamics on excited states, driven by non-adiabatic effects Charge recombination reactions

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Sifiso Musa Nkambule; Stockholms universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mutual neutralization; Dissociative recombination; electronic structure; non-adiabatic; Theoretical Physics; teoretisk fysik;

    Abstract : This thesis is based on theoretical studies of molecular collisions occurring at relatively low to intermediate collision energies. The collisions are called dissociative recombination (DR) and mutual neutralization (MN). READ MORE

  4. 4. Extending Photoinduced Charge Separation. Molecular-semiconductor assemblies for solar energy conversion

    University dissertation from Chalmers University of Technology

    Author : Valeria Saavedra Becerril; Chalmers tekniska högskola.; Chalmers University of Technology.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Charge recombination; Back-electron transfer; Charge separation; Ruthenium complexes.; Dye-sensitized; Conduction band mediated; Artificial photosynthesis;

    Abstract : The conversion of solar energy into chemical energy by harvesting visible-light with synthetic molecules presents several scientific and technological challenges. This thesis is dedicated to the investigation of approaches to long-lived charge separation, one of the crucial aspects for the photochemical generation of solar fuels. READ MORE

  5. 5. Active insulation : possibilities of utilizing free charges in air

    University dissertation from Chalmers University of Technology

    Author : Mats Sjöberg; Chalmers tekniska högskola.; Chalmers University of Technology.; [2000]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; active insulation; dielectric covered structures; air gaps; charge accumulation; surface charge; space charge; dynamic charging; electric field reduction; electric field homogenization; dielectric barrier discharge; microdischarge; capacitively coupled discharge; dielectric breakdown strength; breakdown mechanism;

    Abstract : .... READ MORE