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专利名称：Dynamoelectric machine
发明人：Yuzuru Suzuki,Sakae Fujitani,Kenichi Makino申请号：US08/877490申请日：19970617公开号：US05801463A公开日：19980901
摘要：In a two-phase, half-wave drive brushless motor or other dynamoelectricmachine, a cogging torque reduction effect can be achieved without any reduction inmotor output by reducing the number of auxiliary slots on the main pole surface orauxiliary pole surface and the number of winding slots provided between the main polesand the auxiliary poles. A dynamoelectric machine, comprising: a permanent- magnet fieldportion having 2 n magnetic poles (where n is an even number); an armature core portionhaving 2 n main poles disposed facing each other at prescribed intervals in relation to thefield portion, and 2 n auxiliary poles disposed between the main poles; and auxiliary slotsprovided on the surfaces of the main poles or auxiliary poles that face the field portion;wherein, assuming that nk (where k is an integer of 4 or greater) is the combined numberof the winding slots provided between the main poles and auxiliary poles and of theauxiliary slots provided on the surfaces of the main poles or commutating poles, all thewinding slots and auxiliary slots are divided into two groups of nk/2 slots each; the slotsof the first group occupy positions &phgr;.sub.i that satisfy, in terms of electrical angle,the relation &phgr;.sub.i =(2&pgr;/k)i+2&pgr; p (i=0, 1, 2, . . . , (nk/2)-1; p is an integer of0≦p≦5 (n-1)); and the slots of the second group occupy positions &phgr;.sub.j that satisfythe relation &phgr;.sub.j =(2&pgr;/k)j+2&pgr;q+&pgr;/k (j=0, 1, 2, . . . , (nk/2)- 1; q is an
integer of 0≦q≦(n-1)).
申请人：MINEBEA CO., LTD.
代理机构：Howell & Haferkamp, L
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