Portable electronic device
AssigneeApple Inc.
InventorsChristopher S. Graham, Karl Ruben F. Larsson
Life of this patent
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Abstract
An inductive coil capable of providing power to the battery is described. The inductive coil is formed of a length of a wire having a conductive core capable of carrying an electrical current. The conductive core is surrounded by an insulating layer that electrically isolates the conductive core. Portions of the length of wire include a magnetically permeable material that is plated on an exposed surface of the conductive core.
Claims20
An electronic device, comprising:
- a battery;
- and
- an inductive coil capable of providing power to the battery, the inductive coil comprising:
- a wire having a conductive core capable of carrying an electrical current;
- an insulating layer that surrounds and electrically isolates the conductive core;
- a first magnetically permeable material disposed on the conductive core;
- and
- a second magnetically permeable material disposed on the conductive core, the second magnetically permeable material electrically isolated from the first magnetically permeable material by the insulating layer.
A portable electronic device, comprising;
- a battery;
- and
- an inductive charging unit capable of providing power to the battery, wherein the inductive charging unit comprising:
- an inductive coil that is formed of a wire arranged in a spiral pattern having a first end electrically coupled to a ground and a second end electrically coupled to the battery, wherein the wire includes a conductive core;
- an insulating layer that electrically isolates the conductive core;
- and
- a magnetically permeable material that is plated on the conductive core at an exposed surface of the conductive core, the exposed surface defined by the insulating layer, wherein an interaction with an external magnetic field generates a first eddy current in the conductive core at the insulation layer and a second eddy current in the conductive core at the magnetically permeable material, the second eddy current having a magnitude less than that of the first eddy current.
A method of forming an inductive charging unit having a wire having a conductive core capable of carrying an electrical current, the method comprising:
- surrounding the conductive core by an insulating layer that electrically isolates the conductive core;
- exposing at least a portion of an exterior surface of the conductive core, the exterior surfacing defining an exposed portion that lacks the insulating layer;
- and
- plating a magnetically permeably material on the exposed portion of the conductive core.
Dependencies are inferred from the claim text.