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US 5,834,872 AGranted
Adjustable magnetic coupler
AssigneeMagna Force, Inc.
InventorKarl J. Lamb
Life of this patent
Estimating the term…
Abstract
An adjustable coupler has a group of magnet rotors separated by air gaps from a group of conductor rotors. The air gaps are adjusted by axial movement of one of the groups relative to the other to vary the slip of the coupler and achieve a constant load speed at various load torques.
Claims10
An adjustable magnetic coupler comprising:
- first and second rotary shafts having a rotary axis;
- a group of two axially-spaced magnet rotors each containing a respective set of magnets;
- a group of two axially-spaced conductor rotors each having a nonferrous electroconductive ring spaced by an air gap from a respective one of said sets of magnets;
- the distance between the rotors of a first one of said groups being fixed, and such group being mounted on said first shaft to rotate in unison therewith;
- the rotors of the second one of the said groups being in concentric relation to said second shaft to be moveable axially relative to one another along said second shaft and to rotate together in unison therewith;
- a fifth rotor fixed to said second shaft at a location between the rotors of said second group of rotors;
- and
- a push-pull mechanism associated with said fifth rotor for axially moving a first rotor in said second group of rotors a selected distance in a selected axial direction and for axially moving the second rotor in said second group of rotors an amount equal to said selected distance, but in an axial direction opposite to said selected axial direction, whereby said air gaps are varied equally.
5 more elements
An adjustable magnetic coupler comprising:
- first and second shafts having coaxial rotary axes;
- a group of two axially-spaced magnet rotors each containing a respective set of permanent magnets;
- a group of two axially-spaced conductor rotors each having a nonferrous electroconductive ring spaced by an air gap from a respective one of said sets of magnets;
- the distance between the rotors of one of said groups being fixed, and such group having a first of its rotors mounted on said first shaft to rotate in unison therewith, and having the second of its rotors surrounding said second shaft and radially spaced therefrom by a clearance space;
- a support rotor fixed on said second shaft;
- the rotors of the second of said groups being slidably carried by said support rotor at opposite sides thereof to be moveable axially relative to one another along the rotary axis of said second shaft and to rotate together in unison with said support rotor and second shaft;
- and air gap adjustment means connected to the rotors of the second said group for selectively axially moving them relative to one another a selected distance, in opposite axial directions whereby said air gaps may be varied equally.
4 more elements
Dependencies are inferred from the claim text.