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US 10,312,716 B2Granted
EMI filtering and wireless power transfer in an electronic device using a tuned metallic body
AssigneeQUALCOMM Incorporated
InventorsSeong Heon Jeong, Francesco Carobolante, Charles Edward Wheatley, Mark White, II
Life of this patent
Estimating the term…
Abstract
An apparatus may include an electrically conductive body to magnetically couple to a first magnetic field. A first tuning element may be connected to the electrically conductive body. An electrically conductive coil may be wound about an opening in the electrically conductive body, and configured to magnetically couple to a second magnetic field.
Claims25
An apparatus for wireless power transfer, the apparatus comprising:
- an electrically conductive body forming a portion of a cover or housing of the apparatus, the electrically conductive body configured to magnetically couple to a first magnetic field generated by a wireless power transmitter;
- a first tuning element comprising a capacitor and electrically connected to the electrically conductive body;
- and
- an electrically conductive coil wound about an opening defined by the electrically conductive body, the electrically conductive coil configured to magnetically couple to a second magnetic field generated by the electrically conductive body, the first tuning element and the electrically conductive body defining a filter circuit configured to filter harmonics generated by electronic components of the apparatus.
1 more element
An apparatus for wirelessly receiving power, the apparatus comprising:
- a housing configured to enclose electronic components of the apparatus, the housing comprising a metallic sheet having a shape that defines an opening therethrough and a slot extending from the opening to a periphery of the metallic sheet;
- a first tuning element electrically connected between a first node on the metallic sheet positioned on a first side of the slot and a second node on the metallic sheet on a second side of the slot, the metallic sheet having a shape that allows a first flow of current to be induced therein in response to being magnetically coupled to a first magnetic field;
- an electrically conductive coil wound about the opening and configured such that a second flow of current will be induced in the electrically conductive coil in response to being magnetically coupled to a second magnetic field, generated by the first flow of current in the metallic sheet, to produce the second flow of current in the electrically conductive coil;
- power conversion circuitry configured to produce power from the second flow of current induced in the electrically conductive coil;
- and
- a filter circuit comprising the metallic sheet and the first tuning element, the filter circuit configured to filter harmonics generated by the power conversion circuitry.
3 more elements
Dependencies are inferred from the claim text.