| 摘要 |
<p>When a pitch between centers of two adjacent magnetic pole portions disposed on an armature is defined as Äs, the length W of permanent magnets disposed in the middle is equal to the pitch Äs (W=Äs). The length of each of the two end permanent magnets respectively disposed at either end of a permanent magnet magnetic pole row is denoted by W1. A ratio w1/W of the length W1 to the length W is defined as 0.43<W1/W<0.49. With this definition, cogging torque of a linear motor may sufficiently be reduced.</p> |
