Central Technological Library of the University of Ljubljana (CTK)
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Računanje sil in vrtilnih momentov v magnetnem polju z metodo končnih elementov : doktorska disertacijaHamler, AntonIzračun sile in momenta na osnovi numerične rešitve magnetnega polja z metodo končnih elementov je podvržen napakam različnih izvorov. V tem delu so raziskani izvori teh napak in podani postopki za ... zmanjšanje njihovega vpliva. Prav tako so podani postopki za ovrednotenje napak, ne da bi bile pri tem potrebne meritve. Same metode za izračun sul in momentov so formulirane tako, da so vplivi napak čim manjši. Pri tem so uporabljeni trije osnovni principi določitve sile, in sicer: virtualno delo, Maxwellove napetosti in ekvivalentni magnetilni tokovi. Izkaže se, da so metode, ki temeljijo na katerem koli od omenjenih principov, enako dobre, če so pri tem izpoljneni določeni pogoji. Tem pogojem pa pri posameznih metodah ni enako lahko zadostiti. Pri izračunu magnetnega polja s trajnimi magneti je potrebno poznati dejansko namagnetenost magnetov. Za njihovo določitev je podan simulacijski model magnetenja trajnega magneta, ob zahtevi, da je razmagnetilna krivulja magneta linearna in da je poznana prednostna smer pri anizotropnem magnetu. Rezulatati izračunov so verificirani z meritvami na dveh elektromotorjih. Za oba primera je izdelan merilni model, na keterem so opravljene meritve magnetnih in mehanskih veličin. Izračuni in meritve so narejeni ločeno za stanje, ko v navitju ni električnega toka in nastopa samo preskočni moment ter za stanje s tokom v navitju.Type of material - dissertationPublication and manufacture - Maribor : [A. Hamler], 1994Language - slovenianCOBISS.SI-ID - 6150916
Author
Hamler, Anton
Topics
elektrotehnika |
električni stroji |
vrtilni moment |
metoda končnih elementov |
magnetni pojavi |
magnetno polje
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Hamler, Anton | 04530 |
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