| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamo-electric machine which has a rotor of built-in magnet structure without abnormal vibration, being operating with high efficiency even in a high revolution range, by reducing the magnetic flux of a field without increase of the axial size of the rotor. SOLUTION: The dynamo-electric machine is provided with a third rotor 3 which can relatively rotate adjacently between the first rotor core 1 and the second rotor core 2 fixed to the load side and the anti-load side in the axial direction of a rotating shaft 4, via air gaps from a plurality of stator magnetic poles 17. Furthermore, it is provided with a mechanism which has guide grooves 6a, 7a, and 8a inclined in its circumferential direction, centrifugal plumbs 5 which are inserted in each guide groove and shift within the guide grooves, receiving centrifugal force by the rotation of the rotor, and torsion springs 9 whose one end each is set in each guide groove 8a provided in the retaining member of the third rotor core 3 and whose other end each is set in the groove provided in the rotating shaft 4 and also energizes it in a direction opposite to the rotational direction, witin a plurality of retaining members 6, 7 and 8 which are fixed to the internal perimeters of the rotor cores 1, 2 and 3. The guide grooves and the centrifugal plumbs are as many as the magnetic poles of the rotor cores. COPYRIGHT: (C)2008,JPO&INPIT
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