20.500.12556/RUL-164437 Ugotavljanje stanja ležajev malih vetrnih turbin z merjenjem električne napetosti generatorja Determining the state of bearings in small wind turbines by measuring generator voltage V tem zaključnem delu obravnavamo osnove delovanja električnih generatorjev in iz tega naredimo predpostavke, ki jih potrebujemo za iskanje napak v ležajih malih vetrnih turbin. Ta metoda iskanja napak ne posega v obravnavani stroj, kar je bistveno za male vetrne turbine. Glede na razpoložljivo opremo zasnujemo tri različne merilne postaje, izdelamo vetrnico ter izvedemo meritve z nepoškodovanimi in okvarjenimi ležaji. Vetrnica obratuje v majhnem vetrovniku, pri čemer lahko spreminjamo pogoje obratovanja. Ob tem merimo tudi vibracije ležajnega ohišja za primerjavo. Dobljene meritve obdelamo s programskimi orodji ter jih prikažemo v časovni in frekvenčni domeni in jih med seboj primerjamo. In this final thesis we look at the working fundementals of electrical generators and use those as a guide on how to look for bearing faults in small wind turbines. This method of bearing fault detection does not require additional modification of the considered machine making it very suitable for small wind turbines. Considering the measuring equipment that we have at our disposal, we design three different test rigs, build the turbine and take the measurements with undamaged and faulty bearings. The wind turbine operates in a small wind tunnel where the working conditions can be adjusted. For reference, we also take vibration measurements of the bearing housing. The results are then further processed in a program environment. The results are displayed in time and frequency domains and comparative analysis is made. vetrnice ležaji generatorji električna napetost merjenje vibracij spektralna analiza filtriranje signalov spektrogram wind turbine bearings generator voltage vibration measuring spectral analysis signal filtering spectrogram true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2024-10-25 08:31:37 2024-10-25 08:31:40 2024-12-17 13:54:03 0000-00-00 00:00:00 2024 0 0 XXII, 83 str. 2024 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.9:621.37:621.82(043.2) 267013 219520259 38290.pdf 38290.pdf 1 46110AA9CD253DE560BA1B871E8873D0 dfb44af2dee8388acadfa85590d63edb303b3f38ebdc0d0bcd1b34724d91f3cf 7dc431e4-929a-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=194808 Fakulteta za strojništvo 0 0 0