大学电路题目,大神给个过程 200
I1支路Z1=41.23∠76°
I2支路Z2=11.18∠-63.4°
Z1+Z1=(15+j30)=33.54∠63.43°
I1和I2的并联电路
Z`=Z1//Z2=(10+j40)//(5-j10)
=(10+j40)(5-j10)/[(10+j40)+(5-j10)]
=(50-j100+j200+400)/(15+j30)=(450+j100)/(15+j30)
=461∠12.53°/33.54∠63.43°=13.74∠-50.9°=8.67-j10.66
总Z=10+Z`=18.67-j10.66=21.5∠-29.7°
U10=10∠0°xZ=215∠-29.7°V
I1=10∠0°xZ2/(Z1+Z2)=10∠0°x11.18∠-63.4°/33.54∠63.43°=3.33∠-126.8°
I2=10∠0°xZ1/(Z1+Z2)=10∠0°x41.23∠76°/33.54∠63.43°=12.3∠12.57°
电流源串联10Ω电阻功率PR=10^2x10=1000W
支路1复功率S1=I1^2(10+j40)=111.1+j444.4
支路1复功率S2=I2^2(5-j10)=756.5-j1513
P=1000+111.1+756.5=1867.6≈1868W
Q=-j1513+j444.4=1068.6≈1065Var
基本符合电源总复功率S=U10xI=215∠-29.7°Vx10∠0°=1868-j1065
2024-10-28 广告