Abstract: Disclosed are a wireless power apparatus, a wireless charging system using the same, and a power transceiving method. The wireless power apparatus using resonance includes a coil to wirelessly transceive power according to an operating mode of the wireless power apparatus, a power reception part to receive power through the coil, a power transmission part to transmit power through the coil, and a switch to connect one of the power reception part and the power transmission part to the coil according to the operating mode.

Abstract: A soft magnetic layer for a receiving antenna of a wireless power receiving apparatus includes a first soft magnetic member containing a Mn—Zn ferrite material, and a second soft magnetic member containing a Ni—Zn ferrite material. Accordingly, electromagnetic energy collecting performance of the receiving antenna of the wireless power receiving apparatus is improved, and thereby power transmission efficiency is maximized.

Abstract: A receiver to wirelessly receive power from a transmitter, and including a receiving unit to receive AC power from the transmitter; a rectifying unit to rectify the received AC power to DC power, a power management unit to manage power to be transferred to a load based on the rectified DC power and a DC-DC converter to supply a DC voltage required by the load, or to the load with the rectified DC power. The power management unit generates and transmits a control signal to adjust the power transferred to the load based on the rectified DC power.

Abstract: Disclosed are a wireless power transmitter and a wireless power transmission method thereof The wireless power transmitter, which wirelessly transmits power to a wireless power receiver, includes a power source to generate AC power, a transmission coil receiving power from the power source to generate a magnetic field, a transmission resonance coil coupled with the transmission coil to transmit power generated by the magnetic field to the wireless power receiver using resonance, and a detector detecting an existence state of the wireless power receiver by detecting power transmitted through the transmission resonance coil.

Abstract: A transmitter for transmitting wireless power according to an embodiment of the present invention includes a transmission side communication unit, wherein the transmission side communication unit transmits a first control signal to a reception side communication unit, then receives a second control signal including information about an amount of power of the first control signal from the reception side communication unit, and controls the amount of power of the first control signal by comparing the amount of power of the first control signal with a predetermined range based on the second control signal.

Abstract: An apparatus and method for wirelessly transmitting electromagnetic energy are provided. The apparatus includes a power source, a transmission unit, and a measurement unit. The power source supplies a power according to a certain frequency. The transmission unit receives the power to wirelessly transmit the received power through self resonance. The measurement unit measures a phase difference between a voltage and current of the transmission unit. The certain frequency is controlled according to the phase difference. Accordingly, the apparatus and method control only the frequency of the power supply when a resonance frequency is changed by the change of an ambient environment, thus enhancing energy transmission efficiency.

Abstract: The present invention relates to a method and an apparatus for detecting foreign material for wireless charging, and according to one embodiment of the present invention, a method by which a wireless power transmitter detects foreign material comprises the steps of: measuring the strength of a current inputted into an inverter in a ping step; receiving a packet including a receiver type identifier; determining a threshold value for detecting the foreign material corresponding to the receiver type identifier; and comparing the measured strength of current with the threshold value so as to determine whether the foreign material is present.

Abstract: The wireless power transmitter includes a substrate; a first blocking unit disposed over the substrate and formed of a metallic material; a second blocking unit over the first blocking unit; and a wireless transmission unit mounted on at least one of the first blocking unit and the second blocking unit, wherein the wireless transmission unit includes: a first wireless transmission unit including a first transmission coil; a second wireless transmission unit including a second transmission coil; and a control unit to control such that AC power is output to a transmission coil of one of the wireless transmission units according to a power transmission scheme.

Abstract: A method of controlling a wireless power transmitter to detect a foreign object can include in response to a wireless power receiver being placed in a charging area of the wireless power transmitter, determining a current peak frequency; collecting a communication error count related to communication between the wireless power transmitter and the wireless power receiver; determining a reference frequency for detecting the foreign object based on a reference peak frequency received from the wireless power receiver; and determining that the foreign object is present within the charging area based on the current peak frequency, the communication error count and the reference frequency.

Abstract: Disclosed is a wireless power transmission apparatus to wirelessly transmit power to a wireless power receiving apparatus by using resonance. The wireless power transmission apparatus includes a transmission part including a transmission coil to receive the power from a power supply to generate a magnetic field, a transmission resonance coil to transmit power received therein from the transmission coil, and a plurality of repeating coils placed in the transmission resonance coil to repeat the power, a detection part to detect a position of the wireless power receiving apparatus placed on the transmission part, and a controller to determine a repeating coil corresponding to the position of the wireless power receiving apparatus and perform a control operation to transmit power through the repeating coil.

Abstract: An apparatus and method for wirelessly transmitting electromagnetic energy are provided. The apparatus includes a power source, a transmission unit, and a measurement unit. The power source supplies a power according to a certain frequency. The transmission unit receives the power to wirelessly transmit the received power through self resonance. The measurement unit measures a phase difference between a voltage and current of the transmission unit. The certain frequency is controlled according to the phase difference. Accordingly, the apparatus and method control only the frequency of the power supply when a resonance frequency is changed by the change of an ambient environment, thus enhancing energy transmission efficiency.

Abstract: Embodiments provide a wireless power transfer technology, and more particularly, provide a method of mounting a transmission coil, which wirelessly transmits power, in a wireless power transmitter. The transmission coil module includes a transmission coil for wirelessly transmitting power, a coil frame including a receptacle for insertion of the transmission coil, a support unit for surrounding the receptacle, and a central fixing plate formed inside the receptacle and corresponding to an inner shape of the transmission coil, and a connector for electrically connecting the transmission coil to a control circuit board, and the support unit and the central fixing plate are integrally formed with each other.

Abstract: A charging control device includes a capacitor, a comparison unit and a switching unit. The capacitor is charged with a voltage converted from power received from a wireless power sending device. The comparison unit compares the voltage of the capacitor with a reference voltage, and generates an output signal according to the result of the comparison. The switching unit is connected to the front end of the capacitor and is switched by the output signal from the comparison unit so as to control whether to supply the converted voltage to a load terminal.

Abstract: Disclosed are a wireless power transmitting apparatus and a method thereof. The wireless power transmitting apparatus wirelessly transmits power to a wireless power receiving apparatus. The wireless power transmitting apparatus detects a wireless power transmission state between the wireless power transmitting apparatus and the wireless power receiving apparatus, and generates a control signal to control transmit power based on the detected wireless power transmission state. The wireless power transmitting apparatus generates the transmit power by using first DC power based on the control signal, and transmits the transmit power to a transmission resonance coil through a transmission induction coil unit based on an electromagnetic induction scheme.

Abstract: Disclosed is a wireless power transmission apparatus to wirelessly transmit power to a wireless power receiving apparatus by using resonance. The wireless power transmission apparatus includes a transmission part including a transmission coil to receive the power from a power supply to generate a magnetic field, a transmission resonance coil to transmit power received therein from the transmission coil, and a plurality of repeating coils placed in the transmission resonance coil to repeat the power, a detection part to detect a position of the wireless power receiving apparatus placed on the transmission part, and a controller to determine a repeating coil corresponding to the position of the wireless power receiving apparatus and perform a control operation to transmit power through the repeating coil.

Abstract: Disclosed is a wireless power transmitter which wirelessly transmits power through a wireless power repeater to a wireless power receiver using resonance. The wireless power transmitter includes a power supply unit for outputting AC power having a predetermined frequency, a transmission coil for receiving the AC power to generate a time-variable magnetic field, and a transmission resonant coil unit for transmitting power received from the transmission coil coupled with the transmission resonant coil, wherein the wireless power transmitter determines a resonance frequency for a power transmission while controlling a frequency of the AC power output from the power supply unit and a resonance frequency of the transmission resonant coil unit.

Abstract: Disclosed is a wireless power apparatus to repeat power between a wireless power transmitter and a wireless power receiver. The wireless power apparatus includes a resonant coil resonance-coupled with the wireless power transmitter to wirelessly repeat the power, an induction coil for transferring, to a load, a power generated through coupling the induction coil with the resonant coil and a detecting unit for detecting an existence of the wireless power receiver, wherein the wireless power apparatus operates in one mode of a power reception and a power repeat mode according to a result of a detection of the wireless power receiver, wherein the power reception mode is supplying the power to the load and the power repeat mode is transferring the power the wire-less power receiver.

Abstract: A wireless power transmission apparatus for wirelessly transmitting power to a wireless power reception apparatus according to one embodiment of the present invention may comprise: a first transmission coil; a second transmission coil for transmitting power higher than power transmitted by the first transmission coil; a direct current power conversion unit for receiving direct current power applied thereto and outputting a first voltage and a second voltage higher than the first voltage; and a control unit for selecting one of the first and second voltages on the basis of an operating mode of the wireless power transmission apparatus and required power of the wireless power reception apparatus, and controlling such that power is transmitted through the first or second transmission coil, using the selected voltage.

Abstract: A method of controlling power in a wireless power receiver, the method including receiving an AC power via a reception coil, rectifying the AC power to a DC power and controlling the DC power applied to a load by comparing the DC power with a threshold voltage, wherein the controlling the DC power includes measuring a voltage of the DC power, allowing the load to enter a charging mode by transferring the DC power to the load when the measured voltage is equal to or greater than a first threshold voltage, maintaining the load in the charging mode when the measured voltage is equal to or greater than a second threshold voltage in a state of the charging mode, and blocking the DC power to the load when the measured voltage is less than the second threshold voltage.

Abstract: A wireless power transmission apparatus according to an embodiment of the present invention includes a resonance-type coil unit, an induction-type coil unit, and a loss suppression unit including a serial resonant circuit connected to both ends of the induction-type coil unit, wherein the loss suppression unit resonates at a first frequency for driving the resonance-type coil unit. A wireless power transmission apparatus according to another embodiment of the present invention includes a resonance-type coil unit, an induction-type coil unit, and a switch element connected to both ends of the induction-type coil unit, wherein the switch element is turned on or off when power is transmitted by either of the resonance-type coil unit or the induction-type coil unit.