| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor in which rotation performance can be enhanced while reducing vibration. <P>SOLUTION: In a magnet pole 24, a first opposing part 24a including auxiliary grooves 31 and 32 in a part of the outer peripheral surface in the circumferential direction, and a second opposing part 24b not including the auxiliary grooves 31 and 32 over the entire outer peripheral surface in the circumferential direction are juxtaposed in the axial direction. The auxiliary grooves 31 and 32 are provided so that the positional angle D1 thereof satisfies a relation "D=M/2+G-a×360(°)/L" (a is a natural number), where the open angle of the magnet pole 24 is "M(°)", the open angle of an air gap 27 is "G(°)", and the number of teeth 12 is "L". <P>COPYRIGHT: (C)2012,JPO&INPIT |
