Elektromotorni pogoni pdf

Pa sledi:. Ip Struju izraziti u procentima u odnosu na nominalnu vrednost. M 0 Mstac Mn Mmax. Mm M2 M3 M4. Prema tome motor ima klasu izolacije F kojoj pri maksimalnoj temperaturi ambijenta od 40 [ C], maksimalna dozvoljena temperatura iznosi [oC], odnosno maksimalno dozvoljeni porast o. CT Iz tog proizlazi da je vrednost ukupne rotorske omske otpornosti:. Iz uslova zadatka proizlazi proporcija, iz koje nalazimo brzinu obrtanja motora:.

Ianom Iamin Iamax Ia. Broj stepeni n svakako mora biti ceo broj. Mt' Mnom Mm Mmax Mm. Ukupni ekvivalentna struja motora za ciklus mora biti manja od nominalne vrednosti struje:. M Mnom. Nominalni moment motora iznosi:. Potrebno je oceniti: a Koliki je srednji moment tokom pokretanja?

Strujnu granicu treba podesiti na vrednost nominalne vrednosti struje motora, jer regulacija brzine obrtanja pri polasku potpada u opseg regulacije brzine sa konstantnim momentom, odnosnu u opseg regulacije rotorskog napona. Momenat se pri tome menja saglasno dijagramu na prethodnoj slici.

Iz izraza za vremensku konstantu zagrevanja, nalazimo toplotnu provodnost motora:. Iz uslova da je odnos prevalnog i polaznog momenta 3.

Mm Mnom. Treba sniziti efektivnu vrednost napona napajanja motora. M nom ASM b D. Za pogon iz prethodnog zadatka: a Odrediti broj obrtaja u intervalu zaleta. Ugaona brzina bubnja je prema tome:. Otpor trenja i vetra zanemariti. Motor je sa prinudnom ventilacijom. Momentni zahtevi elektromotornog pogona prikazani su na slici. Open navigation menu.

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