| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotor capable of reducing variations in a magnetic flux density. <P>SOLUTION: First to fourth rotor cores 21 to 24 of a rotor 11 are disposed along an axial direction of a rotary shaft 12. The first to the fourth rotor cores 21 to 24 have claw-shaped magnetic poles 21b to 24b alternately arranged along a circumferential direction. Respective claw-shaped magnetic poles 21b to 24b are formed so as to extend toward mutually opposite directions along the axial direction. At tips of the respective claw-shaped magnetic poles 21b to 24b, two auxiliary grooves 21c to 24c are formed, respectively. A main magnetic flux directed from an annular magnet toward a stator concentrates in a part where the auxiliary groove 21c is not formed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
