Search for dissertations about: "weakening"

Showing result 1 - 5 of 102 swedish dissertations containing the word weakening.

  2. 1. On thaw weakening of pavement structures

    Author : Erik Simonsen; KTH; []
    Keywords : ;

    Abstract : .... READ MORE

  4. 2. On design and analysis of synchronous permanent magnet machines for field-weakening operation in hybrid electric vehicles

    Author : Freddy Magnussen; Chandur Sadarangani; Barrie Mecrow; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Applied mechanics; permanent magnet machines; field-weakening; hybrid electric vehicles; soft magnetic composites; fractional pitch concentrated windings; Teknisk mekanik; Engineering mechanics; Teknisk mekanik;

    Abstract : A regular vehicle of today is equipped with an internal combustion engine that runs on either gasoline or diesel, which are fossil fuels from oil reserves that are millions of years old. In all types of combustion processes carbon dioxide and several other emissions are produced. READ MORE

  5. 3. A permanent magnet synchronous motor for an electric vehicle - design analysis

    Author : Yung-Kang Chin; KTH; []
    Keywords : constant power speed range; electric vehicles; field-weakening; reference flux linkage;

    Abstract : This thesis presents the study and the design analysis of apermanent magnet synchronous motor (PMSM) for the tractionapplication of an electric vehicle. An existing inductiontraction motor for an electric forklift benchmarks the expectedperformances of the proposed PMSM design. READ MORE

  6. 4. Weakening of Crack-tip Singularity due to Buckling of Thin Bodies under Tension

    Author : Li Chong; Hållfasthetslära; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thin foils; Fracture; Buckling;

    Abstract : When thin sheets containing a crack is subjected to tensile loading in the direction perpendicular to the crack surface out of plane displacement will occur in areas surrounding the crack. By this the stress state in the vicinity of the crack tip is changed and leads to a weaker crack tip singularity than the r-1/2 by linear elastic fracture mechanics. READ MORE

  7. 5. Highly Dynamic Drives for Electric Hybrid Vehicles : Electric Machine Design and Dynamic Test Method

    Author : Yury Loayza Vargas; Industriell elektroteknik och automation; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electric Hybrid Vehicles; Electric Machine Design; Dynamic Testing; Dynamic loading; Synthetic Loading; FPGA; Torque Measurement; Field weakening controller FWC ; IPMSM; FEMM; LabVIEW; Dynamic Testing Technique; Dynamic Test Method; CompactRIO;

    Abstract : Electric Hybrid Vehicles (EHVs) play a crucial role in the development towardsa more environmental friendly transportation. An alternative to solve someactual challenges with hybridization of vehicles is studied at the Division ofIndustrial Electrical Engineering and Automation (IEA) at Lund Universityin cooperation with the automotive industry. READ MORE