A magnetic shielding material includes a material comprising manganese bismuth (MnBi) and tungsten (W), where a ratio of MnBi:W is in a range of 50:50 to about 70:30. A radiation shielding product includes a part including manganese bismuth (MnBi) and tungsten (W), and a plurality of layers having a defined thickness in a z-direction, wherein each layer extends along an x-y plane perpendicular to the z-direction. At least some of the plurality of layers form a functional gradient in the z-direction and/or along the x-y plane, and the functional gradient is defined by a first layer comprising a ratio of MnBi:W being less than 100:0 and an nth layer above the first layer comprising a ratio of MnBi:W greater than 0:100.

A wireless electrical energy transmission system is provided. The system comprises a wireless transmission base configured to wirelessly transmit electrical energy or data via near field magnetic coupling to a receiving antenna configured within an electronic device. The wireless electrical energy transmission system is configured with at least one transmitting antenna and a transmitting electrical circuit positioned within the transmission base. The transmission base is configured so that at least one electronic device can be wirelessly electrically charged or powered by positioning the at least one device external and adjacent to the transmission base.

Disclosed is a coil module that receives or transmits electric power or signals wireless by using an electromagnetic field, the coil module including a substrate, a coil provided on at least one surface of the substrate to be rotated in one direction, and a magnetic part covering at least a portion of the coil while directly contacting a surface of the coil, and that acts an electromagnetic booster that enhances an intensity of the electromagnetic field generated on the surface of the coil, and the magnetic part decrease, among a skin effect and a proximity effect of an eddy current generated in the coil, the proximity effect by isolating electric power in a gap of the coil that is rotated in the one direction.

A contactless electrical energy transfer device including a first system which includes at least one first coil including at least one first winding around at least one first zone without wire, a layer of ferromagnetic elements, at least one small column passing through the first coil by passing through a first zone without wire, and a second system which includes at least one second coil including at least one second winding around at least one second zone without wire. The small column or columns make it possible to optimize the magnetic coupling coefficient despite the absence of a layer of ferromagnetic elements in the second system. Also, a flying vehicle fitted with rechargeable batteries and its recharging base, both equipped with the electrical energy transfer device are provided.

A magnetic sheet according to an embodiment of the present invention comprises: a first soft magnetic layer including a first surface and a second surface opposite to the first surface; a first resin layer disposed on the first surface of the first soft magnetic layer and having a first viscosity; a second soft magnetic layer disposed on the first resin layer; and a second resin layer disposed between the first soft magnetic layer and the first resin layer and having a second viscosity different from the first viscosity, wherein the second resin layer comprises a plurality of magnetic particles, the first soft magnetic layer includes a plurality of crack areas propagated from the first surface toward the second surface, and a part of the second resin layer is disposed in the plurality of crack areas.

An antenna for wireless power transfer includes a first antenna terminal, a second antenna terminal, at least one inner turn, the at least one inner turn having an inner turn width, and at least one outer turn, the at least one outer turn having an outer turn width, the outer turn width greater than the inner turn width. The antenna further includes a substrate positioned underneath the at least one inner turn and the at least one outer turn and a plurality of separate panes of a magnetic shielding material. Each of the plurality of separate panes are positioned substantially co-planar, with respect to each other, and positioned between the substrate and both the at least one inner turns and the at least one outer turns.

The present invention relates to a wireless charging device and a mobile means including same. Specifically, according to an embodiment of the present invention, a wireless charging device comprises: a coil unit, a magnetic unit arranged on the coil unit; and a heat transfer unit arranged in contact with at least a portion of the magnetic unit, thereby efficiently transferring heat generated in the magnetic unit to the outside and further improving heat dissipation and charging efficiency. Therefore, the wireless charging device can be advantageously used in a mobile means such as an electric vehicle requiring a large amount of power transmission between a transmitter and a receiver.

A wireless charging apparatus according to an embodiment can improve heat dissipation and charging efficiency by adjusting the surface area of a magnetic pad. Therefore, the wireless charging apparatus can be effectively used for a transportation means, such as an electric vehicle, which requires high-capacity power transmission between a transmitter and a receiver.

In a wireless charging system, a transmitter coil of a wireless charger device and a receiver coil of a portable electronic device can operate at either of two different operating frequencies. The low frequency can be in a range from about 300 kHz to about 400 kHz, and the high frequency can be in a range from about 1 MHz to about 2 MHz. To provide efficient charging at both frequencies, the transmitter and receiver coils can be formed from a compound, or multi-stranded, wire.

A transmitter coil module for inclusion in an accessory device can include a transmitter coil capable of operating at either of two different operating frequencies. The low frequency can be in a range from about 300 kHz to about 400 kHz, and the high frequency can be in a range from about 1 MHz to about 2 MHz. To provide efficient charging at both frequencies, the transmitter coil can be formed from a compound, or multi-stranded, wire. A control module can also be provided that is external to the transmitter coil module The control module can include, for example, a printed circuit board having control circuitry to generate alternating current in the transmitter coil at either the high frequency or the low frequency.