| 摘要 |
PURPOSE:To reduce an overcurrent loss generated in a stator yoke and to contrive to improve a motor efficiency by fitting an apparatus with two stator yokes obtained by forming pole pieces through bending a soft magnetic metal plate and with an annular coil to be arranged between both stator yokes. CONSTITUTION:The cylinder part 31 of one of stator yokes 22, 24 is fitted into the cylinder part 30 of the other stator yoke in such manner that the outside surfaces of pole pieces 28, 29 of said stator yokes 22, 24 face the inner surface of a rotor magnet 14. In the pole pieces 28, 29, moreover, the spaces formed by both stator yokes 22, 24 are unperpendicularly combined with each other so that a magnetic imbalance is generated over the cylinder where an air gap is formed. Further, an apparatus is positioned and fixed by fitting of resin protrusions 35 respectively provided on both outside surfaces of a coil bobbin 32 into holes 36, 37 made in both stator yokes 22, 24 and by heat caulking of said resin protrusions 35. |
