求大神帮忙做个题。。

求大神帮忙做个题。。谢谢
2024-12-27 08:20:27
推荐回答(1个)
回答1:

ω=5,U=120√2
u=U∠0
电阻:电流与电压同相位,i1=120√2/15∠0
=8√2∠0
电感:L=4H,阻抗=ωL=20Ω,电流滞后90°
i2=120√2/20∠-π/2
=6√2∠-π/2
电容:C=0.02F,容抗=1/ωC
=1/(5×0.02)=10Ω,
i3=120√2/10∠π/2
=12√2∠π/2
i2十i3=6√2∠π/2(反向)
i1十i2十i3
=√2√(8²十6²)∠arctan(6/8)
=10√2∠arctan(3/4)