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线çµåU1=230V,è´è½½é»æZ=12+16jΩ
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ç¸çµå=230/â3=133V Z=âï¼12*12+16*16)=20
Ï=arcsin(16/20) =53.15 sinÏ=16/20=0.8 cosÏ=12/20=0.6
(1)æå½¢è¿æ¥è´è½½æ¶ç线çµæµåå¸æ¶çæ»åç:
I=Ux/Z=133/20=6.65A
S=â3UI=â3*230*6.65=2649VA
P=â3UIcosÏ=â3*230*6.65*0.6=1589.4W
Q=â3UIsinÏ=â3*230*6.65*0.8=2119VAR
(2)ä¸è§å½¢è¿æ¥è´è½½æ¶ç线çµæµ,ç¸çµæµåå¸æ¶çæ»åç:
ç¸çµæµ Ix=Ux/Z=133/20=6.65A
线çµæµ I=â3Ix=11.52
S=â3UI=â3*133*11.518=2653.7VA
P=â3UIcosÏ=â3*133*11.52*0.6=1592.2W
Q=â3UIsinÏ=â3*133*11.52*0.8=2122.9VAR