Involute lamination armature for a linear reciprocating motor
AssigneeExxon Enterprises, Inc.
InventorRalph Hurst
Life of this patent
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Abstract
A generally cylindrical armature for a linear motor includes an outer diameter region of involute laminate construction. Restricting the laminate assembly to an outer diameter region of the armature, which region constitutes a high magnetic flux density region, minimizes an arc of involute .alpha.. Minimizing the arc of involute .alpha. approximates more closely a true radial disposition of the involute laminations, thereby increasing the ability of the laminations to reduce eddy current losses, therein providing the basis for a more efficient linear motor.
Claims16
An improved armature for a linear motor comprising a generally cylindrical core of homogeneous nonlaminate ferromagnetic material and at least one annular ring of involute laminations surrounding said core and secured thereto each said lamination being in the form of an involute and extending radially from and axially along said core to provide an essentially solid cylindrical armature having an outer region of laminate construction.
An efficient linear motor of hybrid AC/DC configuration comprising:
- an outer stator member containing a plurality of axially spaced AC electromagnetic coils and at least one DC electromagnetic coil, a generally cylindrical armature situated within said stator which armature includes at least one annular ring of involute laminations extending radially from and axially along a monlaminate core to which core said involute laminations are secured.
The armature of claims 8 or 15 wherein the dynamic mass of the core plunger is reduced by means of hollowing said plunger.
Dependencies are inferred from the claim text.