知识点回顾 4.理想变压器VAR 1 NI:N2 VAR为 u(t)=nu2(t) 1 11 1U2 i()）= -i2(t) n (a 11 NI:N2 n= VAR为 u1(t)=-nu2(t) N2 1 i1(t)=i2(t) (b) n知识点回顾 4. 理想变压器VAR u u2 1 i1 i2 (a) N1:N2 VAR为     = − = ( ) 1 ( ) ( ) ( ) 1 2 1 2 i t n i t u t nu t u u2 1 i1 i2 (b) N1:N2 VAR为     = = − ( ) 1 ( ) ( ) ( ) 1 2 1 2 i t n i t u t nu t 2 1 N N n =