The present disclosure describes techniques for detecting foreign objects. In some aspects, an apparatus for detecting objects is provided. The apparatus includes a plurality of sense circuits, each of the plurality of sense circuits including a primary sense coil having a first terminal and a second terminal, a secondary sense coil having a first terminal and a second terminal, and a capacitor having a first terminal and a second terminal. The first terminal of the capacitor is electrically connected to the second terminals of each of the primary sense coil and the secondary sense coil. The apparatus further includes a driver circuit electrically connected to the first terminal of the primary sense coil of each of the plurality of sense circuits. The apparatus further includes a measurement circuit electrically connected to the first terminal of the secondary sense coil of each of the plurality of sense circuits.

The present disclosure describes a system that includes: an unmanned aerial vehicle (UAV) comprising one or more on-board batteries, and a self-powering payload coupled to the UAV, wherein the self-powering payload comprises: one or more transformable devices configured to alter an orientation of the one or more transformable devices with respect to a transmission line in proximity to the UAV when the UAV is air-borne; one or more coil devices mounted on the one or more transformable devices and configured to capture a magnetic flux of an electromagnetic field generated by the transmission line; and an electric circuit configured to generate, based on the captured magnetic flux, charging currents for the one or more on-board batteries on the UAV while the UAV is in air-borne.

The present disclosure describes a system that includes: an unmanned aerial vehicle (UAV) comprising one or more on-board batteries, and a self-powering payload coupled to the UAV, wherein the self-powering payload comprises: one or more transformable devices configured to alter an orientation of the one or more transformable devices with respect to a transmission line in proximity to the UAV when the UAV is air-borne; one or more coil devices mounted on the one or more transformable devices and configured to capture a magnetic flux of an electromagnetic field generated by the transmission line; and an electric circuit configured to generate, based on the captured magnetic flux, charging currents for the one or more on-board batteries on the UAV while the UAV is in air-borne.

A resonator circuit for a contactless energy transmission system for charging electric vehicles and a contactless energy transmission system for charging electric vehicles are described. The resonator circuit may include first and second terminals, multiple windings, and first and second switching elements. The windings may be divided into first and second groups. A connection node may be arranged between the first and second groups of windings and connected via the first switching element to the first terminal, and the connection node is connected via the first group of windings to the second terminal. The second switching element may be arranged between the second group of windings and the first terminal. The first connection node may be formed in a star-shaped manner between the first group of windings, the second group of windings, and the first switching element.

A resonator circuit for a contactless energy transmission system for charging electric vehicles and a contactless energy transmission system for charging electric vehicles are described. The resonator circuit may include first and second terminals, multiple windings, and first and second switching elements. The windings may be divided into first and second groups. A connection node may be arranged between the first and second groups of windings and connected via the first switching element to the first terminal, and the connection node is connected via the first group of windings to the second terminal. The second switching element may be arranged between the second group of windings and the first terminal. The first connection node may be formed in a star-shaped manner between the first group of windings, the second group of windings, and the first switching element.

Exemplary embodiments are directed to bidirectional wireless power transfer using magnetic resonance in a coupling mode region between a charging base (CB) and a battery electric vehicle (BEV). For different configurations, the wireless power transfer can occur from the CB to the BEV and from the BEV to the CB.

Exemplary embodiments are directed to bidirectional wireless power transfer using magnetic resonance in a coupling mode region between a charging base (CB) and a battery electric vehicle (BEV). For different configurations, the wireless power transfer can occur from the CB to the BEV and from the BEV to the CB.

A plurality of power feed mats are stored as being distributed at a plurality of storage locations, and each of the plurality of power feed mats is configured to supply electric power to a movable body. A server includes a memory and a processor. Data in which an identification number, a type, and a storage location of each of the plurality of power feed mats are associated with one another is stored in the memory. The processor determines at least one power feed mat to be rented based on the data, in response to an inquiry from a user. The processor determines a storage location to be a source of rental or a storage location to be a return destination such that inventory of a plurality of types of power feed mats is ensured at each of the plurality of storage locations.

A wireless power transfer system includes a first power transmission unit, a second power transmission unit, a power reception unit, a sensing unit, and an ECU. The first power transmission unit is provided in a parking space. The second power transmission unit is provided in a traveling lane for a vehicle. The sensing unit senses a sensing target in a sensing region set around the vehicle. When the sensing unit senses the sensing target, the ECU reduces electric power transmitted from the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle. The ECU sets the sensing region to be larger when the power reception unit receives electric power from the first power transmission unit than when the power reception unit receives electric power from the second power transmission unit.

A wireless power transfer system includes a first power transmission unit, a second power transmission unit, a power reception unit, a sensing unit, and an ECU. The first power transmission unit is provided in a parking space. The second power transmission unit is provided in a traveling lane for a vehicle. The sensing unit senses a sensing target in a sensing region set around the vehicle. When the sensing unit senses the sensing target, the ECU reduces electric power transmitted from the first power transmission unit or the second power transmission unit that is transmitting electric power to the vehicle. The ECU sets the sensing region to be larger when the power reception unit receives electric power from the first power transmission unit than when the power reception unit receives electric power from the second power transmission unit.