第5章三相正猴交流电路 若以l=l,为参考正弦量, uu=uu =Um sin at UpnS(ot-120°) WIN? =UnSn(Ot+120°) Uu=Un/0°,Ur=Un/-120°,Um=U120° UU+Ur+Uw=Un/0°+Un120°+n120° U(1--j 0 2°22 +v4+ 03人第5章 三相正弦交流电路 若以 为参考正弦量, U U1 U2 u = u sin( 120 ) sin( 120 ) sin 1 2 1 2 1 2 = = +  = = −  = = u u U t u u U t u u U t W W W p m V VV Pm U U U p m    =  = −  =  • • • UU UP 0 , UV Up 120 , U w Up 120 0 ) 0 2 3 2 1 2 3 2 1 (1 0 120 120 + + = = − − − + = + + =  + −  +  • • • U V W p W p p p U V u u u U j j U U U U U U