Adjustable inductor and method of using the same
AssigneeHubbell Incorporated
InventorKenneth Edward Pagenkopf
Life of this patent
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Abstract
An adjustable inductor including a toroidal core defining a plurality of gaps, a compressible gap material positioned in the gaps, at least one winding wound on the core, a force-applying structure, and a film substantially covering the adjustable inductor. The force-applying structure is operable to apply a force to the core to adjust the gaps and thereby an inductance of the adjustable inductor. The film is configured to prevent movement of force-applying structure when above a predetermined temperature threshold, and allow movement of the force-applying structure when below the predetermined threshold.
Claims12
An adjustable inductor comprising:
- a toroidal core defining a plurality of gaps;
- a compressible gap material positioned in the gaps;
- at least one winding wound on the core;
- a force-applying structure operable to apply a force to the core to adjust the gaps and thereby an inductance of the adjustable inductor;
- and
- a film substantially covering the adjustable inductor, the film configured to
- prevent movement of the force-applying structure when above a predetermined temperature threshold, and
- allow movement of the force-applying structure when below the predetermined threshold.
A tunable trap filter inductor comprising:
- an adjustable inductor including
- a toroidal core defining a plurality of gaps;
- a compressible gap material positioned in the gaps;
- at least one winding wound on the core;
- a force-applying structure operable to apply a force to the core to adjust the gaps and thereby an inductance of the adjustable inductor;
- and
- a capacitor in a series-type electrical connection with the adjustable inductor;
- wherein the adjustable inductor further includes a film substantially covering the adjustable inductor.
A three-phase matched filter inductor comprising:
- a first adjustable inductor having a first variable inductance;
- a second adjustable inductor having a second variable inductance;
- and
- a third adjustable inductor having a third variable inductance;
- wherein the first, second, and third variable inductances are matched after production of the first, second, and third adjustable inductors;
- wherein the first adjustable inductor includes
- a toroidal core defining a plurality of gaps;
- a compressible gap material positioned in the gaps;
- at least one winding wound on the core;
- and
- a force-applying structure operable to apply a force to the core to adjust the gaps and thereby the first variable inductance;
- and
- wherein the first adjustable inductor further includes a film substantially covering the first adjustable inductor.
Dependencies are inferred from the claim text.