本章要点: 相量法 u(t=Um cos(at+ou>Um=UmLo i(t)=Im cos(at +o<>m=ImLo KCL、KVL的相量表示: ∑m=0或∑k=0 =1 ∑Umn=0或∑Uk=0 k=1本章要点: 一 .相量法 m i m m i m u m m u ( ) cos( ) ( ) cos( ) = + ⎯→ = = + ⎯→ = i t I t I I u t U t U U = = = = n k k n k k I I 1 1 m 0 0 或 = = = = n k k n k Uk U 1 1 m 0 0 或 KCL、KVL的相量表示: