| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor in which the magnetic flux of a permanent magnet can be utilized efficiently by a simple arrangement. SOLUTION: A DC motor 101 has an annular armature core 122, and a permanent magnet 105 bonded to a tubular yoke housing 104 and opposing the armature core 122 in the radial direction. The permanent magnet 105 has an axial length longer than the axial length of the armature core 122. A planar magnetism guide portion 106 composed of a soft magnetic body where the axial length of one end face on the permanent magnet 105 side is equal to the axial length of the permanent magnet 105 and the axial length of the other end face on the armature core 122 side is shorter than the axial length of one end face of the permanent magnet 105 is arranged between the armature core 122 and the permanent magnet 105. COPYRIGHT: (C)2008,JPO&INPIT
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