Sökning: "Jörgen Engström"

Hittade 4 avhandlingar innehållade orden Jörgen Engström.

  1. 1. On design of slotless permanent magnet machines

    Författare :Jörgen Engström; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  3. 2. 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

  4. 3. On linear graph invariants related to Ramsey and edge numbers : or how I learned to stop worrying and love the alien invasion

    Författare :Oliver Krüger; Jörgen Backelin; Alexander Engström; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ramsey number; edge number; minimal Ramsey graph; independence number; clique number; Turán s theorem; crochet pattern; H13-pattern; linear graph invariant; triangle-free graph; Mathematics; matematik;

    Sammanfattning : In this thesis we study the Ramsey numbers, R(l,k), the edge numbers, e(l,k;n) and graphs that are related to these. The edge number e(l,k;n) may be defined as the least natural number m for which all graphs on n vertices and less than m edges either contains a complete subgraph of size l or an independent set of size k. LÄS MER

  5. 4. Modeling and testing of line start permanent magnet motors

    Författare :Tomas Modeer; Chandur Sadarangani; Jörgen Engström; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; line start permanent magnet; flux integration; step response; Electrical engineering; Elektroteknik;

    Sammanfattning : This licentiate thesis describes the modeling and measurements performed with the aim of developing design guidelines for Line Start Permanent Magnet Synchronous Motors, LSPMSMs. LSPMSMs can offer higher efficiency than standard induction motors used in the industry today, especially for small motor sizes. LÄS MER