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)( (共 1568 字) [閱讀本文] >>