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Meritev dodatnih izgub pri obremenitvi trifaznih asinhronskih motorjev
Zagradišnik, Ivan ...
V članku je podan splošen opis dodatnih izgub v asinhronskih motorjih, ki neposredno vplivajo na izkoristek motorjev. Sledi teoretičen opis vzbujanja statorskega in rotorskega navitja v zračni reži, ...ki je vzrok nastanka tokovno odvisnih dodatnih izgub. Opisana je metoda nasprotnega vrtenja, s katero določimo tokovno odvisne dodatne izgube. Predstavljena je energijska bilanca motorja. Iz nje je razvidno, kako izračunamo dodatne izgube. Prikazani so rezultati meritev vodno in zračno hlajenih motorjev za glavni oz. direktni pogon vreten CNC strojev. Iz analize rezultatov je razvidno, da so vrednosti dodatnih izgub pri vodno hlajenih visoko nasičenih motorjih večje kot pri zračno hlajenih.
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