Electromagnetic actuator
AssigneeSeiko Precision Inc.
InventorsHisashi Kawamoto, Takashi Nakano, Toshiaki Mikuriya, Akinori Kobayashi
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Abstract
An electromagnetic actuator with a smaller size and an increased strength is provided. In the electromagnetic actuator, a first arm portion and a second arm portion that connect the magnetic poles of a stator extend to the outside of a rotor housing. A first coil and a second coil are wound around the extending portions. In other words, the first coil and the second coil are exposed to the outside of the rotor housing. Accordingly, compared with a case where the rotor housing also houses the first coil and the second coil, the width of the electromagnetic actuator can be reduced by the thickness of the rotor housing. Thus, the electromagnetic actuator can be made compact.
Claims10
An electromagnetic actuator comprising:
- a permanent-magnet rotor;
- a stator that is magnetically bonded to the permanent-magnet rotor;
- coils that excite the stator;
- and
- a rotor housing that rotatably supports and houses the permanent-magnet rotor,
- the rotor housing supporting the stator so that magnetic poles of the stator face an outer peripheral face of the permanent-magnet rotor,
- the coils being wound around portions of the stator extending to the outside of the rotor housing.
Dependencies are inferred from the claim text.