Linear electric machine
OwnerShinichi Yatsuzuka, Yasumasa Hagiwarainventors
Life of this patent
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Abstract
A linear electric machine includes a plurality of teeth spaced apart from each other, a yoke magnetically connected to the teeth, a plurality of coils mounted on the teeth and a movable core disposed opposite the teeth to reciprocate relative to the teeth along an axis of the movable core. The movable core has a plurality of permanent magnets at axially opposite ends thereof for supplying magnetic flux to the teeth, and a member for suppressing generation of a magnetic field disposed at an axial center of the movable core to magnetically separate the permanent magnets.
Claims11
A linear electric machine comprising:
- a plurality of teeth circumferentially disposed to surround a space;
- a yoke disposed around the teeth and magnetically connected to the teeth;
- a plurality of coils mounted on the teeth;
- and
- a movable core disposed in the space opposite the teeth to reciprocate transversely to the teeth, said movable core having a plurality of first permanent magnets at axially opposite ends for supplying magnetic flux to the teeth;
- wherein said movable core comprises means for suppressing generation of a magnetic field disposed to magnetically separate the permanent magnets.
A linear electric machine comprising:
- a movable core disposed to be able to reciprocate along an axial direction;
- a plurality of magnetic teeth disposed to face the movable core;
- and
- a plurality of coils mounted on the teeth;
- wherein said movable core comprises magnetically shielding means for suppressing generation of a magnetic field and a pair of permanent magnets respectively disposed on the opposite sides of the shielding means in the axial direction.
Dependencies are inferred from the claim text.