Sökning: "Induction bearing"

Visar resultat 1 - 5 av 29 avhandlingar innehållade orden Induction bearing.

  1. 1. Induction bearings

    Författare :Torbjörn A. Lembke; KTH; []
    Nyckelord :;

    Sammanfattning : A self stabilizing homopolar induction bearing withintegrated touch down bearings has been developed forhigh-speed applications like flywheels, small gas turbines andcompact vacuum cleaners.Stability is achieved without any control electronics thanksto stabilizing eddy currents induced by permanent magnets. LÄS MER

  3. 2. Design and analysis of a novel low loss homopolar electrodynamic bearing

    Författare :Torbjörn A. Lembke; Chandur Sadarangani; Hannes Bleuler; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; Homopolar bearing; Electrodynamic bearing; Induction bearing; Elektroteknik; Electrical engineering; Elektroteknik;

    Sammanfattning : A novel homopolar electrodynamic bearing, together with a suitable permanent magnet drive, have been developed for high-speed applications where low losses and high reliability are essential and exclude the use of ball bearings, and yet where active magnetic bearings offer a too complex system solution. Considered applications are small turbomolecular vacuum pumps, and maintenance free flywheels for energy storage in remote telecom and satellite systems. LÄS MER

  4. 3. Faults detection and diagnosis for three phase induction machines

    Författare :Mohammed Obaid Mustafa; George Georgoulas; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reglerteknik; Control Engineering;

    Sammanfattning : Three phase induction motors have been intensively utilized in industrial applications, mainly due to their efficiency and reliability. These motors have good properties such as: increased stability and robustness, durability, large power to weight ratio, low production costs and controllability easiness. LÄS MER

  5. 4. On the induction of inflammatory reactions by Streptococcus pyogenes

    Författare :Lisa Påhlman; Infektionsmedicin; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; mycology; Mikrobiologi; bakteriologi; virologi; mykologi; virology; bacteriology; Microbiology; Streptococcal collagen-like surface protein; M protein; Inflammation; Streptococcus pyogenes;

    Sammanfattning : Streptococcus pyogenes is an important human pathogen that causes significant morbidity and mortality worldwide. In order to successfully infect the human host, S. pyogenes is equipped with tools that modulate the human immune defence. LÄS MER

  7. 5. Investigation of Issues Related to Electrical Efficiency Improvements of Pump and Fan Drives in Buildings

    Författare :Johan Åström; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; permanent magnet motor; efficiency measurement; frequency converter; HVAC load profiles and saving potential; loss model; Induction motor;

    Sammanfattning : This thesis deals with issues related to efficiency of building related pump and fan drive systems. Different motor technologies are analyzed and a more detailed study oninverter fed Induction Machines (IM) is presented. LÄS MER