Sökning: "Permanent"

Visar resultat 16 - 20 av 926 avhandlingar innehållade ordet Permanent.

  1. 16. Permanent Magnet Machines with Air Gap Windings and Integrated Teeth Windings

    Författare :Mikael C D Alatalo; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; permanent magnets; NdFeB; special windings; iron powder; synchronous machines;

    Sammanfattning : The thesis deals with axial and radial flux permanent magnet machines with air gap windings and an integrated teeth winding. The aim is to develop a machine that produces a high torque per unit volume with as low losses as possible. LÄS MER

  3. 17. New and old materials for permanent magnets based on earth-abundant elements

    Författare :Daniel Hedlund; Peter Svedlindh; Martin Sahlberg; Mogens Christensen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; permanent magnets; material development; sustainability; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

    Sammanfattning : Electrical motors, which find use in e.g. electrical vehicles, require per-manent magnets to function. Comparing ferrite magnets and Nd-based magnets reveals a large difference in their price and performance. LÄS MER

  4. 18. 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. 19. Analysis and Verification of a Slotless Permanent Magnet Motor for High Speed Applications

    Författare :Jörgen Engström; KTH; []
    Nyckelord :slotless motor; airgap winding; permanent magnets; high speed; axial leakage; rotor sleeve losses; harmonic inductance; bearing loss; windage loss; end shield loss;

    Sammanfattning : .... LÄS MER

  7. 20. Prediction of permanent deformations in asphalt concrete using the mechanistic-empirical pavement design guide

    Författare :Erik Oscarsson; Trafik och väg; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; permanent deformation; design guide; asphalt concrete; mechanistic empirical;

    Sammanfattning : Permanent deformations, or rutting, are internationally considered to be one of the most serious distress mechanisms in asphalt pavements. Deterioration modeling is an important tool for performance prediction and diagnostics of pavements. LÄS MER