| 摘要 |
<p>In a permanent magnet type three-phase stepping motor having a stator (1) having 3L pieces of stator pole and a rotor (2) having a permanent magnet (4, 9) magnetized so as to form a plurality ( Nr ) of N and S pole pairs, wherein a condition of 0.3 </= ä ( Nr / pi ) ( Ws + Wr ) / ( Ds + Dr ) ü </= 0.5 is established, where L is an integer not less than 1, Nr is L ( 3n +/- 1), n is an integer not less than 1, Ds is an inner diameter of the stator (1), Dr is an outer diameter of the rotor (2), Ws is a width of the stator pole tooth, and Wr is a width of the rotor tooth. <IMAGE></p> |
