Abstract:
Disclosed is a wireless charging apparatus and method, the apparatus including a controller configured to control the wireless charging apparatus, and a transmitter configured to form a rotating magnetic field in a three-dimensional (3D) space in response to a first clock signal and a second clock signal generated under a control of the controller, wherein a phase difference between the first clock signal and the second clock signal is 90 degrees.
Abstract:
Provided are wireless power transmitting method and apparatus using dual-loop in-phase feeding. The wireless power transmitting apparatus includes a generator configured to generate a Radio Frequency (RF) signal, an amplifier configured to amplify the generated RF signal, a matching circuit configured to be connected to the amplifier to perform impedance matching, a first resonator configured to comprise a first feeding loop connected to the matching circuit and transmit wireless power using a signal provided through the first feeding loop, and a second resonator configured to comprise a second feeding loop connected to the matching circuit and transmit wireless power using a signal provided through the second feeding loop, wherein the first and second feeding loops are formed in a manner that allows magnetic fields respectively generated by the first and second resonators to be excited in the same direction and in phase.
Abstract:
Provided is a battery charging method using wireless power transmission, the method including: receiving a first message associated with a battery charge start from a reception apparatus; discovering an optimal frequency band for a transmit power signal to be transmitted to the reception apparatus based on the first message; receiving, from the reception apparatus, a second message that includes an extra power value and a charge power value, and is associated with a charge state of the reception apparatus; and adaptively controlling transmit power so that the extra power value is maintained to be constant in proportion to a relationship between the charge power value and a first parameter, based on the second message.
Abstract:
An artificial neural network apparatus and an operating method including a plurality of layer processors for performing operations on input data are disclosed. The artificial neural network apparatus may include: a flag layer processor for outputting a flag according to a comparison result between a pooling output value of a current frame and a pooling output value of a previous frame; and a controller for stopping operation of a layer processor which performs operations after the flag layer processor among the plurality of layer processors when the flag is outputted from the flag layer processor, wherein the flag layer processor is a layer processor that performs a pooling operation first among the plurality of layer processors.
Abstract:
Provided is a wireless power transmission device to reduce an electromagnetic wave except for a signal to be transmitted during wireless power transmission, the wireless power transmission device including a transmitter configured to generate a magnetic field by inputting a high-frequency power signal generated by a transmission circuit into a first coil, a receiver configured to generate an induced current by allowing the generated magnetic field to pass through a second coil, and a reducer configured to reduce a harmonic component of the high-frequency power signal using a third coil inserted on a path between the transmitter and the receiver.
Abstract:
A coaxial resonance coil having a toroidal shape for wireless power transmission is provided. The coaxial resonance coil may include a central conductive wire used as a power feeding loop for indirectly feeding power to a resonance coil, and an outer conductive wire used as a resonance coil which is wound a plurality of turns in a toroidal shape around the central conductive wire as an axis.
Abstract:
Provided is a wireless charging apparatus for performing wireless charging of an electronic device including a receiving coil located in a three-dimensional (3D) wireless charging zone using a plurality of transmitting coils arranged in the 3D wireless charging zone and at least one power source configured to supply a current to the plurality of transmitting coils.
Abstract:
Disclosed is a wireless power receiving apparatus, which includes: a residual power collecting unit configured to collect residual power remained after supplying an RF power signal to a load while receiving the RF power signal through a resonator; a power selecting unit configured to select one of the RF power signal and a power signal of an auxiliary battery according to a reception state of the RF power signal; a communication unit configured to receive the power signal of the auxiliary battery and perform wireless communication with the wireless power transmitting apparatus, when a supply of power to the load is required in a state in which the transmission of the RF power signal from the wireless power transmitting apparatus is stopped; and a controller configured to request the transmission of the RF power signal to be supplied to the load.
Abstract:
A method for wirelessly receiving energy and data, including: a resonation operation of resonating a first frequency power signal transmitted from a transmission apparatus; a reception operation of receiving a second frequency data signal transmitted from the transmission apparatus; a first matching operation of matching input/output impedance upon receiving the first frequency power signal; a rectification operation of rectifying impedance-matched power signal from the first matching operation into a DC current; a second matching operation of matching input/output impedance upon receiving the second frequency data signal; an oscillation operation of outputting a second frequency signal by using the first frequency signal output from the resonation operation, as a reference frequency; and a frequency mixing operation of mixing the impedance-matched data signal from the second matching operation with the signal output from the oscillation operation to restore a baseband data signal.
Abstract:
An atomic magnetometer, which operates in a communication system using a magnetic signal in a very low frequency (VLF) band, may comprise: a vapor cell comprising one or more alkaline metal atoms; a pump light source configured to provide circularly polarized pump beams to the vapor cell; an irradiation light source configured to provide linearly polarized irradiation beams to the vapor cell; a magnetic signal detecting unit configured to detect a magnetic signal by measuring a polarization rotation angle from the linearly polarized irradiation beam passing through the vapor cell; and a bias magnetic field control unit configured to control a bias magnetic field applied to the vapor cell.