| 摘要 |
PROBLEM TO BE SOLVED: To suppress shaft vibration of a motor by canceling a radial electromagnetic force. SOLUTION: A motor device includes: a substantially cylindrical stator 20 wherein a plurality of small coils 23a having, at the fitting part 22 for fitting a coil, the coil length corresponding to the section area of the coil and/or the number of coil windings and a plurality of large coils 23b longer in the coil length than the small coils 23a, each provided on the inner circumferential surface; a housing 1 for accommodating the stator 20; a rotor 10 rotatably supported inside the coil 23; and a power supplying means 5 for rotating the rotor 10 by flowing current into the coil 23 to generate a rotating magnetic field. The small coils 23a are respectively provided to the fitting part 22 formed on the circumferential first region A1 of the stator 20 and to the fitting part formed on the circumferential third region A3 opposed to the first region. The large coils 23b are respectively provided to the fitting part 22 formed on the circumferential second region of the stator 20 and to the fitting part 22 formed on the circumferential fourth region A4 opposed to the second region. COPYRIGHT: (C)2009,JPO&INPIT
|
