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US 4,760,294 AGranted
Linear motor with independently controlled coils
OwnerThomas C. Hanseninventor
Life of this patent
Estimating the term…
Abstract
Linear motor having a plurality of individually energizable coils along an axis. An armature member moves along the axis, and the coils are selectively energized to position the armature member along the axis. The motor is constructed in modular form and can be extended to any desired length by adding coil units and switching elements.
Claims15
In a linear motor:
- a plurality of independently energizible windings having openings aligned along an axis, an armature member movable along said axis and through the openings in said windings, and positioning means including independently controlled elements connected to said windings for selectively energizing said windings to produce a magnetic field which interacts with said armature member to position said armature member along said axis, said positioning means further including means for activating any selected one or combination of said independently controlled elements so that said armature member can be statically positioned at any selected position along said axis.
In a linear motor:
- an armature member movable along a longitudinal axis, a plurality of independently energizable coils spaced along the axis, each of said coils comprising an electrical conductor around a coil axis which is generally perpendicular to the longitudinal axis, and positioning means including independently controlled elements connected to the coils for selectively energizing the coils to produce a magnetic field which interacts with the armature member to position the armature member along the longitudinal axis, said positioning means further including means for activating any selected one or combination of said independently controlled elements so that said armature member can be statically positioned at any selected position along said axis.
In a linear motor:
- an armature member movable along a longitudinal axis, a plurality of independently energizable coils spaced along the axis, each of said coils comprising an elongated electrical conductor wound about a coil axis which is generally perpendicular to the longitudinal axis and folded to a U-shaped configuration with said portions generally parallel to the coil axis, and positioning means including independently controlled elements connected to the coils for selectively energizing the coils to produce a magnetic field which interacts with the armature member to position the armature member along the longitudinal axis, said positioning means further including means for activating any selected one or combination of said independently controlled elements so that said armature member can be statically positioned at any selected position along said axis.
In a linear motor:
- a plurality of generally planar substrates stacked face to face along an axis and having central openings therein, elongated electrical conductors carried by the substrates and wound about the openings to form a plurality of independently energizable windings, an armature member movable along the axis and through the openings in the substrates, and positioning means including independently controlled elements connected to the conductors for selectively energizing the conductors to produce a magnetic field which interacts with the armature member to position the armature member along the axis, said positioning means further including means for activating any selected one or combination of said independently controlled elements so that said armature member can be statically positioned at any selected position along said axis.
Dependencies are inferred from the claim text.