A receiver (6) is disclosed for wirelessly receiving power from a transmitter. The receiver comprises a resonant receiver circuit having a plurality of coils (200a)-(200d) operatively coupled to a combining circuit (202). Each coil, with the combining circuit, is arranged to receive power via resonant inductive coupling. The combining circuit is arranged to combine power received from the plurality of coils for provision to an electric load. Other embodiments provide a capsule for ingestion by a patient, the capsule comprising the receiver.

Systems, methods and apparatus for wireless charging are disclosed. A method for operating a wireless charging device includes determining that a chargeable device is positioned proximate to a plurality of charging coils provided at a charging surface of the wireless charging device, identifying two or more charging configurations for the chargeable device, determining power loss while wirelessly transmitting power to the chargeable device for each charging configuration in the two or more charging configurations, and initiating charging of the chargeable device using a charging configuration associated with a lowest power loss to configure the wireless charging device. Each charge configuration includes at least one of the plurality of charging coils.

A wireless connector includes: a first unit attached detachably from the outside of a first object; and a second unit attached detachably from the outside of a second object. The first unit includes a first housing to which a first transmission/reception part and a first connector part are secured, the first connector part being attached to the first object and transmitting a to-be-transmitted target between the first connector part and the first object. The second unit includes a second housing to which a second transmission/reception part and a second connector part are secured, the second connector part being attached to the second object and transmitting a to-be-transmitted target between the second connector part and the second object. The first transmission/reception part and the second transmission/reception part are arranged so as to be separated from each other and opposed to each other to wirelessly transmit the to-be-transmitted target.

A wiring device includes a line input terminal configured to couple to a source of alternating current (AC) power and a charging circuit having an induction coil to propagate a magnetic charging field to emanate from the wiring device. The wiring device can be provided individually or in a kit with a wall plate configured for covering the wiring device. Magnet(s) can be provided proximate a front face of a housing of the wiring device, and/or included in/on a wall plate, to magnetically attract an electronic device when the electronic device is positioned proximate the front face. Such wall plates can be provided individually without a wiring device. Additionally or alternatively, a wall plate with or without magnets can include a shelf protruding from a bottom portion thereof, the shelf configured to support an electronic device in position of a front face of a housing of a wiring device.

An annular resonator and a wireless power transmitter are provided. The annular resonator includes upper and lower surfaces, outer and inner surfaces arranged along an annular shape, a plurality of conductors, and a plurality of capacitors connected to the plurality of conductors, respectively. Each conductor includes a first section arranged on the upper surface, a second section extending from the first section and arranged on the outer surface, a third section extending from the second section and arranged on the lower surface, and a fourth section extending from the third section and arranged on the inner surface. A first section of each of a first conductor, a second conductor, a third conductor, and a fourth conductor are sequentially arranged along the upper surface. A second section of each of the second conductor, the third conductor, the fourth conductor, and the first conductor are sequentially arranged along the outer surface.

Systems, methods and apparatus for wireless charging are disclosed. A wireless charging device has a resonant circuit including one or more power transmitting coils in a charging surface of the charging device, a driver circuit configured to provide a charging current to the resonant circuit, and a controller. The controller is configured to determine an average transmitted power using samples of current and voltage captured from the resonant circuit, and determine that a foreign object is located on or near the charging surface when the average transmitted power exceeds a measurement of received power provided by a receiving device and parasitic losses associated with the wireless charging device. In one example, each sample of current is obtained by measuring a current flowing in the resonant circuit, and each of sample of voltage is obtained by measuring a voltage across the one or more power transmitting coils.

A metasurface for wireless power transfer includes an insulated support structure. A plurality of magnetically coupled resonators are insulated and supported by the insulated support structure. The plurality of coupled resonators are configured and arranged to couple within and shape a magnetic near field distribution from a transmitter into a target distribution toward a target receiver. The plurality of coupled resonators form a non-uniform impedance distribution pattern to provide the shape of the target distribution. The insulated support structure can be thin and flexible, allowing it to be worn by a person, for example to transfer power to an implanted device.

Condition monitoring device including a condition monitoring sensor configured to acquire vibration signals produced by the system and an integrated power supply having an energy harvester for providing power energy to the condition monitoring sensor and having an electromagnetic coil and a permanent magnet. The integrated power supply includes a system power switch between the energy harvester and the condition monitoring sensor and configured to be switched between at least a first high impedance position providing power energy of the energy harvester to the sensor and a second low impedance position where no power is transmitted to the sensor. Also, a system for restricting movement of the energy harvester configured to be connected across the electromagnetic coil in the low impedance passive position of the system power switch.

The present invention provides a multi-coil inductive power transfer primary comprising a plurality of coil. A power transfer regime is selected based on a determined load on each of the plurality of coils.

A hearing instrument charger device for charging an individually shaped hearing instrument, includes: a charger casing; a charger power supply within the charger casing; a first charger coil connected to the charger power supply; charger electronics for controlling charging of the hearing instrument; and a holder configured for receiving the hearing instrument, the holder located within the charger casing; wherein the holder for the hearing instrument has a shape that is specific for the individually shaped hearing instrument, such that when the individually shaped hearing instrument is received in the holder, a second charger coil of the individually shaped hearing instrument is in an operative position for receiving charging power from the first charger coil of the hearing instrument charger device.