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Browsing by Subject "komutacja"

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  • thumbnail.journal.alt
    Item type:Doctoral Dissertation, Access status: Open Access ,
    Diagnostyka maszyny komutatorowej prądu stałego bazująca na analizie spektralnej pomiarowo dostępnych sygnałów
    (2004-12-16) (Data obrony: 2008-06-04) Zdrojewski, Antoni
    Wydział Elektrotechniki, Automatyki, Informatyki i Elektroniki
    Simulation and measurement investigations as well as spectral analysis of readily accessible measurement signals have been carried out for commutator dc motor with internal rotor asymmetries. Construction of considered motor enables to realize the breaking of one rotor coil and shorting of two groups of rotor coils. Each group contained three rotor coils. The basis of study were transients: current and voltage of field winding, current and voltage of armature winding and velocity of the rotor. Measurements have been carried out for supplying of field circuit from dc generator. Armature circuit was supplied from dc generator and thyristor converter. In each case the dc machine was operating as a motor in open and closed regulation system. Amplitudes of diagnostic harmonic of voltages and currents are strongly depending on rotor velocity. These amplitudes are also depending on intensity of shorting of rotor coils. Amplitudes of harmonies of field and armature voltages as well as field and armature currents in conditions of three coils shorting through resistance 7.7 m$\Omega$ are several dozen greater than those in faultless state. Such relation is sufficient for detection of fault (coils shorting). Amplitudes of harmonies of field and rotor currents in case of breaking of one rotor coil are weakly depending on rotor velocity. Results of spectral analysis indicate that field and armature currents as well as field and armature voltages contain information about the motor state and can be used as diagnostic signals.
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Model symulacyjny i badania trójfazowego mostka tyrystorowego
    (Data obrony: 2019-06-04) Wojciechowska, Monika
    Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Właściwości trójfazowych przekształtników tyrystorowych
    (Data obrony: 2020-12-10) Gawlik, Wiktoria
    Wydział Energetyki i Paliw