Sökning: "magnetostriction"

Hittade 3 uppsatser innehållade ordet magnetostriction.

  1. 1. HVDC transformer core resonance calculation

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Axel Thorstrand; [2021]
    Nyckelord :HVDC; High Voltage Direct Current; Transformer core; Natural frequencies; Energy method-based equation; HVDC; Högspänning likström; Transformatorkärna; Naturliga frekvenser; Energimetod;

    Sammanfattning : Transformers emit a characteristic humming noise due to magnetostriction which is the continuous change in dimensions during magnetization. The noise is amplified if the induced frequencies match the core’s natural frequencies, consequently avoiding geometries that create resonance is critical in order to fulfill customer sound level requirements. LÄS MER

  3. 2. Investigation of Inverse Magnetostriction inCobalt Films and Nanowires

    Master-uppsats, Uppsala universitet/Molekyl- och kondenserade materiens fysik

    Författare :Ahmad Montaser Lababidi; [2020]
    Nyckelord :;

    Sammanfattning : In this thesis, a study of the inverse magnetostriction (the Villari effect) of Co nanowires and films is presented. The main objective was to investigate the stability of the Co nanowires’ magnetic properties, i.e. LÄS MER

  4. 3. Tailoring the magnetic anisotropy in amorphous FeZr-based thin films on flexible and solid substrates

    Master-uppsats,

    Författare :Matteo Menniti; [2018]
    Nyckelord :amorphous; magnetic; materials; anisotropy; material characterization; iron; cobalt; zirconium; boron; moke; magneto optical; tailoring; material design; flexible; magnetostriction; functional materials; sensor;

    Sammanfattning : In this thesis the magnetic properties of novel amorphous magnetic materials grown on a flexible substrate of polyethylene naphthalate and a silicon wafer have been analyzed and characterized. The analyzed films are two films of amorphous Cobalt-Iron-Zirconium(Co36Fe53Zr11 & Co37Fe55Zr8) grown on the flexible substrate and two films of amorphous (Fe89Zr11) doped with boron (B). LÄS MER