1、感应电动势与主磁通 空载运行时,忽略R和e1≈e1设:中=功 , sinat 0N①nSin(0t-90°)=E1nSin(Ot-/2) do 0N2nsin(ot-90°)=E2mSin(0t-兀/2 感应电动势e1和e2均滞后于φ的电角度90°,其有效值为 E1mONΦn21 2 2=44 E,,ON,④,2nNV④ E m=444N2④, 2√2 2 E和E2的相量表达式 E1=-444NNΦ E2=-444N2①10 1、感应电动势与主磁通 空载运行时,忽略i1R1和e1σ 1 1 u e sin m 设: = t 1 1 1 1 d sin( 90 ) sin( π / 2) d m m e N N t E t t = − = − − = − 2 2 2 2 d sin( 90 ) sin( π / 2) d m m e N N t E t t = − = − − = − 感应电动势e1 和e2 均滞后于φ 的电角度90° ,其有效值为 m m m m f N E N f N E 1 1 1 1 1 4.44 2 2π 2 2 = = = = m m m m f N E N f N E 2 2 2 2 2 4.44 2 2π 2 2 = = = = E1和E2的相量表达式 m E fN 1 44 1 = −j4. m E fN 2 44 2 = −j4