9-1阻抗和导纳 5∠600 Z33.54∠63400.149∠-3.4°A UR=RI=15×0.149∠-34°=2235∠-3.4°V UL=joLI=56.52900×0.149∠-3.4=8.42∠86.4V UC=-iI=26.5∠-900×0.149∠-3.40=395∠-934°V C 则:i=0.1492cos(ot-3.4°)A l=22352cos(ot-349)V l=8:2√2c0s(ot+86.69)V c=3.952cos(ot-9349)V§9-1 阻抗和导纳 0.149 3.4 A 33.54 63.4 5 60 o o o =  −   = = Z U I   1 5 0.149 3.4 2.235 3.4 V o o U R = RI  =   − =  − j 5 6.5 9 0 0.149 3.4 8.4 2 8 6.4 V o o o U L = LI  =    − =  2 6.5 9 0 0.149 3.4 3.9 5 9 3.4 V C 1 j o o o U C = − I  =  −   − =  −  则: 0.149 2cos( 3.4 ) A o i = ωt − 2.235 2cos( 3.4 ) V o uR = ω t − 8.42 2cos( 86.6 ) V o uL = ω t + 3.95 2cos( 93.4 ) V o uC = ω t −