4-9=2AUa=1021=5A12=3AU1=10 U2=101=10∠90°A1=1+2=10∠0°A U1=1007U0=1002 4-10U,=10 TU,=10 U=10√2U=102 4-11R2=29.699=0.144H 4-12/=2∠-15.33°1=164∠-60.3°12=145∠37.8° U1=82∠-7°,Uz=4∠1468° 4-13i=442sin(3141-53.1)A 2=22√2sin(3141+369°)4 =492√2sin(314-2656°)A cosQ=cos2656°=0.9P=97416W Q=48406arS=10824A相量图略 4-14R=10gL=0.172H 4-151=5.6∠40.2°12=1.12∠-866U=58:5∠-40° 4-16U,=220∠135°U=220√2∠0° 4-17=5.2A22=275∠-652° 4-181=4∠-53.13°412=825∠2283°A U=81.42∠9°P=804.2 4-19U=17.26U=236.5P=2373.23B=119W 4-20I=22.46A 4-2111=2∠-60°12=2∠60°=2∠0°U=6020°4－9 I0 = 2A U0 =10 2V I1 = 5A I2 = 3A U1 =10V U V I A I I IR A   2 =10  1 =1090  0 =  1 +  =100 U1 =100V U0 =100 2V 4－10 10 20 10 U2 = V U3 = V U4 = V U5 =10 2V U6 =10 2V 4－11 RL = 29.69 L = 0.144H 4－12 2 15.33 1 1.64 60.3 2 1.45 37.8    I  = − I  = − I  =  8.2 7 , 4 14.68 1   U  = − U  Z =  4－13 44 2sin(314 53.1 ) i 1 t A  = − i 2 22 2sin(314t 36.9 )A  = + i 49.2 2sin(314t 26.56 )A  = − cos = cos 26.56 = 0.9 P = 9741.6W   Q = 4840.6Var S =10824VA 相量图略 4－14 R =10 L = 0.172H 4－15 1 5.6 40.2 2 1.12 86.6 58.5 40    I  =  I  = − U  = − 4－16 220 135 , 220 2 0   U  L =  U  C =  4－17  I = 5.2A Z2 = 275− 65.2 4－18 4 53.13 8.25 22.83 I 1 A I 2 A    = −  =  U = 81.429 V P = 804.2W   4－19 U1 =17.26V U = 236.5V P2 = 2373.23W P1 =119W 4－20 I = 22.46A 4－21 2 60 2 60 2 0 60 0 1 2     I  = − I  =  I  =  U  a b = 