Essays about: "arcs"

Showing result 21 - 25 of 36 essays containing the word arcs.

  1. 21. Vibration Analysis on AC Electric Arc Furnace

    University essay from KTH/Materialvetenskap

    Author : Edwin Bergstedt; Johan Földhazy; Alexander Lundstjälk; [2015]
    Keywords : electric arc furnace; vibrations; Fast Fourier Transform system; measurements;

    Abstract : A computerized Fast Fourier Transform system has been used to analyse vibration measurements sampled from a 100-ton electric arc furnace. It has been the hypothesis that patterns in the vibration data would correlate to specific events in the electric arc furnace during the melting process. READ MORE

  3. 22. Modelling of breaking arcs when they are extinguished by current zero-crossings

    University essay from Uppsala universitet/Elektricitetslära

    Author : Ericsson Oscar; [2014]
    Keywords : ;

    Abstract : When breaking large currents in switching devices, arcs are created, which continue to carry the current. It is desirable to extinguish these in order to break the current. In this master thesis a model of the arcs behavior during current zero-crossings was made and put into a module, which is to be used when simulating electrical AC arcs. READ MORE

  4. 23. The Birimian event in the Baoulé Mossi domain (West African Craton) : regional and global context

    University essay from Lunds universitet/Geologiska institutionen

    Author : Mikael Grenholm; [2014]
    Keywords : accretionary orogen; Atlantica; Birimian event; supercontinent cycle; Lomagundi-Jatuli event; Earth and Environmental Sciences;

    Abstract : The crystalline basement of the West African Craton (WAC) was established during the Siderian to Orosirian (circa 2.35-1.95 Ga) Birimian event through accretion of extensive tracts of juvenile crust that was tectonically juxtaposed with Archean cratons. READ MORE

  5. 24. Height Determination of the Acceleration Region for Dayside Occurring Auroral Arcs

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Gustav Sandström; [2014]
    Keywords : ;

    Abstract : The aim for this bachelor thesis is to determine the altitude of the auroral acceleration region occuring on the dayside. Substantial work has already been done on this topic, but for occurrence at the nightside. In this paper only negative quasi-static potential structures were considered, as they are the main contributor for producing aurora. READ MORE

  6. 25. Height determination of the acceleration region for dayside occuring auroral arcs

    University essay from KTH/Skolan för elektro- och systemteknik (EES)

    Author : Gustav Sandström; [2014]
    Keywords : ;

    Abstract : .... READ MORE