Wireless power receive coil for metal backed device
AssigneeQUALCOMM Incorporated
InventorSeong Heon Jeong
Life of this patent
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Abstract
An apparatus for wirelessly coupling power via a first magnetic field may include an electrically conductive casing portion configured to generate a second magnetic field in response to eddy currents induced in the electrically conductive casing portion by the first magnetic field. The electrically conductive casing portion may include a non-conductive area and a first slot. A power receiving element wound around the non-conductive area and crossing over the first slots can couple to the second magnetic field to output electrical current to wirelessly power or charge a load.
Claims28
An apparatus for wirelessly coupling power via a first magnetic field generated by a transmitter, comprising:
- an electrically conductive casing portion configured to generate a second magnetic field in response to eddy currents induced in the electrically conductive casing portion in response to the first magnetic field, the electrically conductive casing portion having a shape that defines a non-conductive area, a first slot and a second slot extending in different directions from the non-conductive area, and a third slot extending from the non-conductive area in a different direction than the first and second slots;
- and
- a power receiving element comprising a plurality of conductive windings arranged on the electrically conductive casing portion and wound around the non-conductive area and crossing over the first and second slots, the power receiving element configured to couple to the second magnetic field to output electrical current to wirelessly power or charge a load.
An apparatus for wirelessly coupling power via a first magnetic field generated by a transmitter, comprising:
- an electrically conductive casing portion configured to generate a second magnetic field in response to eddy currents induced in the electrically conductive casing portion in response to the first magnetic field, the electrically conductive casing portion including a first piece of electrically conductive material having a shape that defines a first portion of a non-conductive area and a second piece of electrically conductive material having a shape that defines a second portion of the non-conductive area, the first and second pieces of electrically conductive material spaced apart by a first slot, the second piece of electrically conductive material defining a second slot that extends from the second portion of the non-conductive area;
- and
- a power receiving element comprising a plurality of conductive windings disposed on the first and second pieces of electrically conductive material and wound about a periphery of the non-conductive area, the plurality of conductive windings crossing the first slot at first and second locations thereof, the power receiving element configured to couple to the second magnetic field to output electrical current to wirelessly power or charge a load.
An apparatus for wirelessly coupling power via a first magnetic field generated by a transmitter, comprising:
- an electrically conductive casing portion configured to generate a second magnetic field in response to eddy currents induced in the electrically conductive casing portion in response to the first magnetic field, the electrically conductive casing portion having a shape that defines at least a portion of a first non-conductive area, a second non-conductive area, and a first slot extending from the first non-conductive area to the second non-conductive area;
- and
- a power receiving element comprising a plurality of conductive windings arranged on the electrically conductive casing portion and wound around a periphery of the first and second non-conductive areas and the first slot, the power receiving element configured to couple to the second magnetic field to output electrical current to wirelessly power or charge a load.
Dependencies are inferred from the claim text.