Motor with external rotor
AssigneeGeneral Electric Company
InventorsDennis P. Bobay, Glen C. Young
Life of this patent
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Abstract
An inside out electric motor includes a rotor having an interior surface defining an interior space and a magnetic element mounted on the rotor. The motor also includes a stator having a bobbin. The bobbin has a bearing positioned at a central axis of the bobbin. The bearing rotatably engages the rotor to permit the rotor to freely rotate with respect to the stator. The bobbin also has a pole member molded into the bobbin so that an end of the pole member is spaced radially inward from and at least partially aligned with the magnetic element, and a winding wound around the bobbin so that the winding passes adjacent the pole member.
Claims12
An inside out electric motor comprising:
- a rotor having an interior surface defining an interior space and a magnetic element mounted on the rotor;
- and
- a stator including a bobbin and a bearing positioned at a central axis of the stator rotatably engaging the rotor thereby to permit the rotor to freely rotate with respect to the stator, a pole member molded into the stator for mounting the pole member on the stator so that an end of the pole member is spaced radially inward from and at least partially aligned with the magnetic element, and a winding wound around the bobbin so that the winding passes adjacent the pole member, the pole member including at least two legs joined by a cross-piece.
An inside out electric motor comprising:
- a rotor having an interior surface defining an interior space and a magnetic element mounted on the rotor;
- and
- a stator including a generally cylindrical bobbin having a channel extending circumferentially about the bobbin, a bearing positioned at a central axis of the bobbin rotatably engaging the rotor thereby to permit the rotor to freely rotate with respect to the stator, pole members located in angularly spaced positions around the central axis, each pole member having at least two spaced-apart legs extending from an axially extending cross-piece mounted on the bobbin so that the legs extend radially outward from the cross-piece with respect to the bobbin, so that at least one of said legs is positioned on each side of the channel, and so that each of said legs is spaced radially inward from and at least partially aligned with the magnetic element, and a winding circumferentially wound around the bobbin so that the winding is positioned in the channel and passes between the legs of the pole member.
Dependencies are inferred from the claim text.