Variable reluctance transducers
AssigneeHalliburton Energy Services, Inc.
InventorGeorge David Goodman
Life of this patent
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Abstract
An example variable reluctance device includes a load structure connected to an armature through a connecting arm. The armature is positioned between two oppositely oriented core structures. A structural frame secures the core structures in a fixed position, forming gap regions between the core structures and the armature, forming a magnetic circuit. The armature is resiliently centered between the core structures by a spring, such that the gaps and are approximately equal in width when the armature is at rest. The device further includes a magnetic substance within the gaps that is compressed or stretched to allow movement of the armature.
Claims29
A device comprising:
- a first magnetic structure;
- a second magnetic structure configured to move relative to the first magnetic structure upon application of an electrical current across the second magnetic structure;
- and
- a gap of a variable width between the first magnetic structure and the second magnetic structure;
- and
- a magnetic polymer disposed within the gap to conform to the variable width of the gap as the second magnetic structure moves relative to the first magnetic structure and to mechanically damp a motion of the second magnetic structure relative to the first magnetic structure.
A method of manufacturing a variable reluctance device comprising:
- forming a dynamic magnetic gap by positioning a moveable magnetic structure in proximity with a static magnetic structure;
- and
- applying a magnetic polymer within the magnetic gap such that the magnetic polymer conforms to the gap and substantially eliminates air between the moveable magnetic structure and the static magnetic structure.
A method, comprising:
- providing a first magnetic structure and a second magnetic structure separated by a gap having a variable width, there being a magnetic polymer within the gap;
- and
- applying an electrical current across the second magnetic structure to cause a relative motion between the first and second magnetic structures and the gap width to vary, wherein the magnetic polymer conforms to the varying gap width and mechanically damps the relative motion between the first and second magnetic structures.
Dependencies are inferred from the claim text.