Motor
AssigneeSony Corporation
InventorsTakashi Mochida, Sachiko Kaneko
Life of this patent
Estimating the term…
Abstract
A motor includes a shaft that serves as a rotation center when a rotor is rotated with respect to a stator, a bearing that supports the shaft in a circumferential direction of the shaft, a thrust bearing that supports one end of the shaft in a thrust direction of the shaft, a magnet that is fixed to the rotor and alternately magnetized to different poles in a rotational direction of the shaft, a core that is fixed to the stator and disposed to face the magnet in a radial direction of the shaft, a coil that are wound around the core, and a magnetic shield that shields leakage flux leaking from the magnet to the coil. A magnetic center of the core is offset from a magnetic center of the magnet in the thrust direction, so that the shaft is attracted to the thrust bearing.
Claims10
A motor comprising:
- a shaft that serves as a rotation center when a rotor is rotated with respect to a stator;
- a bearing that supports the shaft in a circumferential direction of the shaft,
- a thrust bearing that supports one end of the shaft in a thrust direction of the shaft;
- a magnet that is fixed to the rotor and alternately magnetized to different poles in a rotational direction of the shaft;
- a core that is fixed to the stator and disposed to face the magnet in a radial direction of the shaft;
- a coil that is wound around the core and
- a magnetic shield that shields leakage flux leaking from the magnet to the coil,
- wherein a magnetic center of the core is offset from a magnetic center of the magnet in the thrust direction, so that the shaft is attracted to the thrust bearing.
Dependencies are inferred from the claim text.