Concentric electric motor additive speed drive
OwnerGerald R. Herreninventor
Life of this patent
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Abstract
An electric motor additive speed drive assembly comprising at least two incrementally increasing diameter electric motors mounted in an integrated concentric manner along a common axis such that the speed and horsepower of the assembly output shaft is the sum of the speed and horsepower of the energized electric motors in the assembly. At least one set of electrically conductive end bearings spans the annular space between the casings of each motor in the assembly allowing the stators of each internal motor to rotate. Electricity is conducted to each inner motor through the electrically conductive end bearings.
Claims8
An electric motor drive assembly comprising:
- a) at least two electric motors, having incrementally increasing diameters, mounted in an integrated concentric manner along a common rotational axis, wherein the rotating stator of each internally mounted motor is removably coupled to the rotor of the incrementally larger motor in said assembly;
- and
- b) at least one set of electrically conductive end bearings spanning the annular space between each consecutive motor casing in said assembly.
A method for varying the output speed of a concentric multiple electric motor drive comprising:
- a) energizing the innermost motor through a set of electrically conductive end bearings to rotate the output shaft at a first nominal speed,
- b) energizing the second innermost motor through a set of electrically conductive end bearings to rotate the stator of said innermost motor at the speed of the second innermost motor thereby rotating said output shaft at the sum of both motor speeds,
- c) energizing each incrementally larger motor in said motor drive through a set of electrically conductive end bearings thereby incrementally adding speed and horsepower to said output shaft.
Dependencies are inferred from the claim text.