发布时间 : 星期五 文章机电传动控制复习题更新完毕开始阅读c6303afa3d1ec5da50e2524de518964bcf84d2b7
一般nN=(0.94-0.98)n0 n0=nN/0.96=1000 r/min SN= (n0-nN)/ n0=(1000-960)/1000=0.04 P=60f/ n0=60*50/1000=3 ③ η=PN/P输入 P输入=3/0.83=3.61 5：解： PN=UNINηN
7500W=220V*IN*0.885 IN=38.5A
TN=9.55PN/nN=47.75Nm
6：① n0=UNnN/(UN-INRa)
=220*1500/220-34.4*0.242 = 1559r/min TN=9.55PN/nN =9.55*6500/1500 =41.38Nm
1559
41.38 ② n=U/Keφ-(Ra+Rad)T/KeKtφ2
= U/Keφ-(Ra+Rad)T/9.55Ke2φ2 当3Ω n=854r/min 当5Ω n=311 r/min
③ n= U/Keφ-RaT/9.55Ke2φ2 当UN=0.5UN时 n=732 r/min n0=UNnN/2(UN-INRa) =780 r/min
④ n= U/0.8Keφ-RaT/9.55Ke2φ20.82 当φ=0.8φ时n=1517 r/min
n0=UNnN/0.8Keφ =1964 r/min
n0
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