678 KB22 KB198520252007Hadžiselimović, MiralemHederić, ŽeljkoŠtefanko, StjepanZagradišnik, Ivanštevilka:3letnik:37str. 152-157ISSN:0352-9045COBISSID:12171798URN:URN:NBN:SI:doc-7ZJ115DXenStrokovno društvo za mikroelektroniko, elektronske sestavne dele in materialeInformacije MIDEMasinhronski motorjiElectronikaelektronikaviličarjiAnalyses of shaft currents in low-voltage induction motor for forklift drive with electronic equipment|At the power supply of the low-voltage asynchronous motors (with homogeneous yokes) from the network, shaft currents resulting in damage of bearings, can emerge. The main cause of these currents is the eccentric position of rotor in the stator bore (static and dynamic eccentricity). The required condition for the emergence of these currents is nonlinearity of magnetizing curve of electrical steel of the motor stack lamination. The article describes performed measurements on the four-pole motor. First, the measuring equipment: Rogowski coil and his mounting, AD converter NI-DAOPad- 6015 and power analyzers NORMA-D6000 have been described. Then, ways of measurements and processing of measurements have been explained. Data obtained by measurements have been presented at the nominal load, for the star- and delta-connected stator winding, measured with AD converter NI-DAOPad-6015 and power analyzer NORMA-D6000. Differences in measured results of shaft currents measured by the power analyzer NORMA- D6000 related to measurements with the AD converter NI-DAOPad-6015 are explainedPri napajanju nizkonapetostnih asinhronskih motorjev (s homogenimi jarmi) iz omrežja lahko nastanejo tokovi v gredi, ki imajo za posledico okvaro ležajev. Glavni vzrok teh tokov je ekscentrični položaj rotorja in statorja (statična in dinamična ekscentričnost). Potrebni pogoj za nastanek teh tokov je nelinearnost magnetilne krivulje materiala - lamel paketa, tj. dinamo pločevine motorja. V članku so opisane izvedene meritve na štiripolnem motorju za pogon viličarja. Najprej je opisana merilna oprema: tuljava Rogowskega in njena vgradnja, AD kartica NI-DAOPad-6015 in digitalni analizator NORMA-D6000. Nato so pojasnjeni načini meritev in predvsem obdelavameritev. Za izvedene meritve so prikazani rezultati meritev v nazivnitočki, za vezavo zvezda in trikot statorskega navitja z AD kartico NI-DAOPad-6015 in inštrumen- tom NORMA-D6000. Pojasnjene so razlike merilnih rezultatov za vrednosti tokov gredi pri merjenju z AD kartico NI-DAOPad-6015 glede na meritve z analizatorjem moči NORMA-D6000TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaStrokovno društvo za mikroelektroniko, elektronske sestavne dele in materiale