Electric motor
AssigneeJohnson Electric S.A.
InventorJean P. Steiner
Life of this patent
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Abstract
A permanent magnet direct current electric motor including a stator core, a stator winding for a stator core, and a magnetic rotor rotatably mounted inside the stator, in which the stator core comprises a closely wound helical coil of ferromagnetic wire, and in which the stator winding is positioned between the stator core and the rotor.
Claims12
A permanent magnet direct current electric motor, including a stator core, a preformed cylindrical stator winding for the stator core and a magnetic rotator rotatably mounted inside the stator winding, in which the stator core comprises a preformed, flexible closely-wound helical coil of resilient ferromagnetic wire which fits snugly over the winding and having a mean inside diameter substantially equal to an outside diameter of the winding, the coil being arranged to be fitted to the winding by rotating one of its ends relative to the other to increase its inside diameter and sliding the coil over the winding.
A permanent magnet direct current electric motor, comprising:
- (a) a generally cylindrical stator winding;
- (b) a magnetic rotor mounted for rotation inside the stator winding;
- and
- (c) a preformed, flexible, cylindrical stator core disposed on a radially outward surface of the stator winding, the stator core comprising a single layer coil formed of at least one resilient ferromagnetic wire extending helically over the axial length of the coil in radial engagement with the stator winding.
Dependencies are inferred from the claim text.