反串联L=L1+L2-2VL L1=L2,顺串联L=4L1,反串联L=0 松耦合k=0,L=L+L2 (3)螺绕环自感系数L 半个螺绕环自感系数L L=L'+L'+2M=2(L'+M) r-2M< (4)用磁通量计算 (i)顺串联: M ④=Φ1+Φ12+Φ21+Φ22 =LI+MI+MI+L,I =(L+L2+2M1, L=Φ/I=L,+L,+2M (ii)反串联: Φ=D11+D12+Φ21+Φ2 =LI-MI-MI+LI =(L+L2-2M1, L=Φ/1=L+L2-2M 例:线圈并联(L,L2,M=0) 1=11+12, dldid dt dtdt 8n=-山d’ 5ua=-1 di dl2 6L2 d 8L=-L 1 dt =4+62,6L=6=62,i=,+,L=, -L-L1-L2 L1+L2 33 反串联 L = L1 L2 2 L1L2 L1 L2 ,顺串联 L = 4L1 ,反串联 L =0 松耦合k 0 , L = L1 L2 (3)螺绕环自感系数 L L 半个螺绕环自感系数 L , , 2 L L 2 L L 2 L L L L L 2M 2(L M ) 2 2 L M L L (4)用磁通量计算 (i)顺串联: L1 M L2 11 12 21 22 = L I MI MI L I 1 2 =(L L 2M )I , 1 2 I L / I L1 L2 2M 1 2 3 4 (ii)反串联: L1 M L2 11 12 21 22 = L I MI MI L I 1 2 =(L L 2M )I , 1 2 I L / I L1 L2 2M 1 2 3 4 例:线圈并联( L1 , L2 , M =0) , 1 2 I I I dt dI dt dI dt dI 1 2 1 I L1 , dt dI L L 1 1 1 dt dI L L 2 2 2 dt dI L L 2 I L2 , , , 2 2 1 1 L L L L L L L L1 L2 1 2 1 1 1 L L L 1 2 1 2 L L L L L L1 L2 B2 B1 B2 B1B1 2 n n1 2 n n1 I