双层短距绕组的磁动势 fa= 4 Nkak cos0, 2p 元2p kw=kdikpl双层短距绕组的磁动势 s w p s d q i p Nk k i p Nk f       cos cos 2 4 2 4 1 1 1 1 = = w1 d1 p1 k = k k