Method and apparatus for forming an electric motor having stacked laminations
AssigneeGeneral Electric Company
InventorsRobert K. Hollenbeck, Dennis P. Bobay, David M. Erdman
Life of this patent
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Abstract
An electric motor including a stator, a rotor, and a housing adapted to support the stator and the rotor is provided. The stator includes a stator core, a first and second lamination stack, a flux tube extending therethrough, and windings on the stator core. The rotor includes a hub having an inner surface, a magnet coupled to the hub inner surface, and a shaft received in the stator core for rotation of the rotor relative to the stator about the longitudinal axis of the shaft.
Claims33
An electric motor comprising:
- a stator including a stator core, a first and second lamination stack, a flux tube extending therethrough, and windings on said stator core;
- a rotor including a hub having an inner surface, a magnet coupled to said hub inner surface, and a shaft received in said stator core for rotation of said rotor relative to said stator about a longitudinal axis of said shaft;
- and
- a housing adapted to support said stator and said rotor.
An electric motor comprising:
- a stator including a stator core, a first and second lamination stack, a flux tube extending through said first and second lamination stack, and a winding on said stator core;
- each said lamination stack comprising a plurality of laminations configured to be stacked together, each said lamination comprising a body having an outer edge, a central opening aligned with said stator core central opening and configured to receive said flux tube, a plurality of pole pieces extending axially from said lamination outer edge, and a notch extending through said lamination body from said lamination body central opening to said lamination body out edge;
- a rotor comprising a hub, an inner surface, a magnet coupled to said hub inner surface, and a shaft received in said stator core for rotation of said rotor relative to said stator about a longitudinal axis of said shaft;
- and
- a housing adapted to support said stator and said rotor.
A method of assembling an electric motor comprising the steps of:
- inserting a stator at least partially within a housing, the stator including a stator core, a first and second lamination stack, a flux tube extending therethrough, and a winding wound on the stator core;
- inserting a rotor at least partially within the stator core to form a stator/rotor subassembly, the rotor including a shaft and a hub having a magnet therein, the rotor being mounted for rotation relative to the stator about a longitudinal axis of the rotor shaft;
- and
- snap connecting the stator/rotor subassembly to the housing.
A control circuit for an electric motor comprising:
- a power supply circuit comprising a diode bridge and a capacitor connected to a resistor and a zener diode;
- and
- a power switching circuit for commutating a stator of the motor, the power switching circuit comprising power switches for selectively connecting the dc power source through the power supply circuit to a winding of the stator.
Dependencies are inferred from the claim text.