Search for dissertations about: "high voltage measurement"

Showing result 1 - 5 of 124 swedish dissertations containing the words high voltage measurement.

  2. 1. Development and application of high voltage dielectric spectroscopy for diagnosis of medium voltage XLPE cables

    Author : Peter Werelius; KTH; []
    Keywords : dielectric spectroscopy; high voltage; variable frequency; diagnostics; non-disgnostics;

    Abstract : When polymer power cables were introduced into mediumvoltage applications in the late 1960s, the degradationphenomenon later referred to aswater treeingwas still unknown. However, this changedwithin a relatively short space of time. READ MORE

  4. 2. Inductive measurement of narrow gaps for high precision welding of square butt joints

    Author : Edvard Svenman; Anna-Karin Christiansson; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Eddy current; Seam tracking; Measurement; Laser beam welding; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : A recent method in aero engine production is to fabricate components from smaller pieces, rather than machining them from large castings. This has made laser beam welding popular, offering high precision with low heat input and distortion, but also high productivity. READ MORE

  5. 3. Immunoassays using high-Tc SQUIDs

    Author : Fredrik Öisjöen; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; YBCO; antigen.; magnetic nanoparticles; immunoassays; antibody; SQUID; High-Tc;

    Abstract : The development of a system for immunoassays using highly sensitive high-Tc superconducting quantum interference devices (SQUIDs) and magnetic nanoparticles (MNPs) is described in this thesis.High-Tc SQUIDs were fabricated using pulsed laser deposition and photolithography. READ MORE

  6. 4. Low-Frequency Noise in Si-Based High-Speed Bipolar Transistors

    Author : Martin Sandén; KTH; []
    Keywords : bipolar junction transistor BJT ; heterojunction bipolar transistor HBT ; silicon-germanium SiGe ; polysilicon emitter; high-frequency measurement; low-frequency noise; noise modeling; hydrogen passivation; voltage controlled oscillator VCO ; pha;

    Abstract : .... READ MORE

  7. 5. Processing and characterization of GaN/SiC heterojunctions and SiC bipolar transistors

    Author : Erik Danielsson; KTH; []
    Keywords : silicon carbide; gallium nitride; device simulation; bipolar junction transistor; heterojunction; heterojunction bipolar transistor; current-voltage measurement; capacitance-voltage measurement; self-heating;

    Abstract : Silicon Carbide (SiC) and Gallium Nitride (GaN) are bothwide bandgap semiconductors that have been suggested for highpower, high voltage, and high temperature applications. Themost investigated SiC devices so far are the Schottky diode,PiN diode and the field effect transistor. READ MORE