Sökning: "permanent magnet"

Visar resultat 1 - 5 av 125 avhandlingar innehållade orden permanent magnet.

  1. 1. Wave Energy Conversion : Linear Synchronous Permanent Magnet Generator

    Författare :Oskar Danielsson; Mats Leijon; Göran Engdahl; Uppsala universitet; []
    Nyckelord :Engineering physics; Finite element method; linear synchronous generator; longitudinal end effect; permanent magnet; point absorber; offshore testing; wave power; Teknisk fysik;

    Sammanfattning : This thesis studies the electric aspects of a linear synchronous permanent magnet generator. The generator is designed for use in a wave energy converter, which determines the fundamental requirements of the generator. The electromagnetic properties of the generator are investigated with a finite element based simulation tool. LÄS MER

  3. 2. Design of Rare Earth Free Permanent Magnet Generators

    Författare :Petter Eklund; Sandra Eriksson; Leijon Mats; Marcus Berg; Oskar Wallmark; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; permanent magnet generators; electrical machine design; ferrite permanent magnet; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Low speed permanent magnet (PM) synchronous generators (SGs) are commonly used in renewable energy. Rare earth (RE) PMs such as neodymium-iron-boron are a popular choice due to their high performance. LÄS MER

  4. 3. Design of a Permanent-Magnet Assisted Synchronous Reluctance Machine for a Plug-In Hybrid Electric Vehicle

    Författare :Kashif Saeed Khan; Chandur Sadarangani; Yujing Liu; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electric vehicle; hybrid electric vehicle; integrated charger; interior permanent-magnet machine; magnet placement; permanent-magnet assisted synchronous reluctance machine; surface mounted permanent-magnet machine; syncronous reluctance machine;

    Sammanfattning : .... LÄS MER

  5. 4. Demagnetization and Fault Simulations of Permanent Magnet Generators

    Författare :Stefan Sjökvist; Sandra Eriksson; Sami Ruoho; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Demagnetization; Permanent magnet; Finite Element Method; Synchronous generators; Wind power; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

    Sammanfattning : Permanent magnets are today widely used in electrical machines of all sorts. With their increase in popularity, the amount of research has increased as well. In the wind power project at Uppsala University permanent magnet synchronous generators have been studied for over a decade. LÄS MER

  7. 5. Theoretical Magnet Design : From the electronic structure of solid matter to new permanent magnets

    Författare :Alexander Edström; Jan Rusz; Olle Eriksson; Ingo Opahle; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : A good permanent magnet should possess a large saturation magnetisation (Ms), large mag- netocrystalline anisotropy energy (MAE) and a high Curie temperature (TC). A difficult but important challenge to overcome for a sustainable permanent magnet industry is to find novel magnetic materials, exhibiting a large MAE, without the use of scarcely available elements such as rare-earth metals. LÄS MER