例3-5图示电路中R1=R2=R=R6=192,R3= R4=R7=Rg=0.59, $4 costa, S13 =4A, us3=4cosV,us7=3V。列出电路的结点电压 方程
例3-5 图示电路中R1=R2=R5 =R6=1Ω, R3= R4=R7 =R8=0.5Ω,iS4=2costA, iS13=4A, uS3=4costV, uS7 =3V。列出电路的结点电压 方程
s13 ② R R 8 R 6 R 53 RA u Si R + 1
解:指定参考结点,并对其他结点编号,设结 点电压un1、un2、un3、un4 (G,+G4+GS)unl-Gun2-G4un4=is13+is4 G,unI+(G+G2+g5un2-g2un3=0 G2 Un2+G2+G3+G)un3-G3un4=1s13-G3us3 G4unl-G3un3+(G3+G4+Gun4==is4+G3us3+G,us7 5unl-un2-2un4==4+ 2 cos t un1+3un2 -un3=0 u +4u 2 n 3 2un4 4-8cos t -2un1-2un3+ 6un4=cos t+6
解:指定参考结点,并对其他结点编号,设结 点电压un1、un2、un3、un4 4 n1 3 n3 3 4 7 n4 S4 3 S3 7 S7 2 n2 2 3 6 n3 3 n4 S13 3 S3 1 n1 1 2 5 n2 2 n3 1 4 8 n1 1 n2 4 n4 S13 S4 G u G u (G G G )u i G u G u G u (G G G )u G u i G u G u (G G G )u G u 0 (G G G )u G u G u i i 2u 2u 6u 6cost 6 u 4u 2u 4 8cost u 3u u 0 5u u 2u 4 2cost n1 n3 n4 n2 n3 n4 n1 n2 n3 n1 n2 n4