9.7.7 計(jì)算實(shí)例

已知數(shù)據(jù):PN＝400kW,nc＝750r/min,GD2＝1.177×105N·m2,Is＝f(s)、Tem＝f(s)見(jiàn)表9-10,TL＝0.3,jN＝3.21A/mm2。1.起動(dòng)時(shí)間計(jì)算起動(dòng)時(shí)間按表9-10計(jì)算,ts＝37.9s2.定子繞組起動(dòng)溫升計(jì)算∑Isn2△tn按表9-10計(jì)算。js＝IsejN＝4.61×3.21=14.8A/mm2取θ0＝15℃θ=(235+θ0)( ......（本文共 1568 字 ）     [閱讀本文] >>