1、互感及互感电压 (空芯耦合线圈)+ dt 21 21 21· 互感系数 φn=pNi 1= 21=p2N2i1→平21=2N2i1=M21i 12=M 12 M1;互感系数N2:i2一2=一平2=1N=2 M12=M21=M 中1=1N2→平12=2N22=M12i22 6-1、互感及互感电压 (空芯耦合线圈) u1 i1 u2 i2 N1: i1 11 =1N1 i1 11 =1N1 2 i1 =L1 i1 s1 21 =2N2 i1 21 =2N2 2 i1 =M21 i1 N2: i2 22 =2N2 i2 12 =1N1 i2 s1 22 =2N2 2 i2 12 =2N2 2 i2 =L2 i2 =M12 i2 dt di L dt d u 1 1 11 11 dt di M dt d u 1 21 21 21 M21: 互感系数 dt di L dt d u 2 2 22 22 dt di M dt d u 2 12 12 12 M12: 互感系数 M12 = M21 =M