(2)磁路的基尔霍夫电压定律 Ni-2H4k =H 4+H242+Hos=d RmI+d2Rne+pRm k=18 （2）磁路的基尔霍夫电压定律 1 1 2 2   1 m1  2 m2  m 3 k 1 N i =  Hk l k =H l + H l + H = R + R + R =