DC motor apparatus with an index signal output

摘要: A dc motor apparatus with an index signal output comprises: a including: stator having driving coils; rotor plural pairs of magnetic poles; sensors provided to the for sensing flux from poles, one producing first signal; and circuit responsive signals drive energize poles magnetized exhibit different intensity density that remaining peak level detecting thereof holding it predetermined interval produce reference comparing second when has relationship n. is changed in accordance detected generate stably.