Abstract:
PURPOSE: A wireless power transmission system and a power control method thereof based on a detection parameter are provided to reduce interference about peripherals and increase power transmission efficiency. CONSTITUTION: A power converter(118) generates wake-up electricity or operation electricity by converting a DC voltage into an AC voltage by using a resonance frequency. A source resonator(131) transmits wake-up electricity or operation electricity to a target device(120) through a magnetic coupling. A control and communication unit(117) transmits a wake-up request signal for an initial communication to the target device and receives the response signal of the wake-up request signal from the target device. The control and communication unit controls the power converter based on a detection parameter of target device which is included in the response signal.
Abstract:
PURPOSE: A communication device and a communication method are to prevent erroneous connection between a source and a target, to prevent collision between a plurality of targets, to judge possibility of erroneous connection of a target by comparing used power when transmitting a command and receiving power through a communication channel and to judge possibility of erroneous connection of a target by comparing wirelessly transferred power and transferred power to a load of a target in a charge mode. CONSTITUTION: A communication device in a wireless power transfer system includes a channel search unit(510) searching communication channels except for a channel used for wireless power transfer and measuring status information of communication channels, a channel determination unit(520) determining a communication channel used for communication with a detected target in a wireless power transfer region of a source based on status information of the measured communication channels, a communication unit(540) transmitting a channel occupation signal having a specific size and an access standard command to a target using a communication frequency of the determined communication channel and a control unit(530) determining whether communication is okay or not in a determined communication channel based on possibility of reception of a response signal corresponding to the access standard command. [Reference numerals] (510) Channel search unit; (511) Channel measurement unit; (520) Channel determination unit; (530) Control unit; (540) Communication unit
Abstract:
PURPOSE: A wireless power transmission system, power control system and apparatus in a wireless power transmission system are provided to control a resonance frequency by considering power transfer efficiency. CONSTITUTION: A power conversion unit(114) generates tracking power or operation power. A source resonator(116) transmits the tracking power or operation power to a target device. A control and communication unit(115) determines a resonance frequency. The control and communication unit performs power control. The power conversion unit generates the operation power by considering the power transfer efficiency and the amount of power consumption of the target device. [Reference numerals] (114) Power conversion unit; (115,126) Control and communication unit; (122) Rectifier
Abstract:
PURPOSE: A method and apparatus capable of detecting load change of wireless power transmission are provided to perform an action protecting overvoltage and overcurrent by communicating with the wireless power transmission apparatus. CONSTITUTION: A control and communications unit transmits PA power(1310). The control and communication unit can control supply power transmitted to PA, by controlling the power supplier. The control and communication unit senses change of the PA current by detecting PA current(1320). The control and communication unit can sense change of the PA by detecting a power detector. The control and communication unit detects target load based on the change of PA current(1330). The control and communication unit determines the status of wireless power transmission based on detected target load. The control and communication unit can control PA power based on detected target load. [Reference numerals] (1310) Wireless power transmission; (1320) Current change detection; (1330) Load detection; (1340) Wireless power transmission condition determination; (AA) Start; (BB) End
Abstract:
PURPOSE: An electronic device and method for transceiving wireless power are provided to improve the efficiency of wireless power transmission by having a high Q-factor using a first capacitor of a lumped component. CONSTITUTION: A source device(110) includes an AC/DC converter(111), a power converter(114), an impedance adjusting unit(117), and a source resonator(116). The AC/DC converter generates a DC voltage by rectifying an AC voltage outputted from a power source(112). The impedance adjusting unit includes matching switches connected to a plurality of capacitors. A target device(120) includes a target resonator(121), a rectifier(122), a DC/DC converter(123), a switch(124) and a charger(125). The target resonator receives electromagnetic energy from the source resonator. The rectifier rectifies the AC voltage received in the target resonator. [Reference numerals] (114) Power converter; (115) Control and communication unit; (122) Rectifier; (125) Charger; (126) Control and communication unit
Abstract:
PURPOSE: An inner band data communication system using wireless power is provided to execute data communication by transmitting data through wireless power by using a resonation frequency. CONSTITUTION: A modulation unit(120) modulates transmission data. A demodulation unit(140) detects reflected power. The demodulation unit demodulates the modulated reception data based on a modulation rate of the reflected power. A source resonation unit(150) transmits transmission power including the modulated transmission data. The source resonant unit receives the reflected power. A control unit(160) provides the transmission data of a pulse signal type. The control unit controls an impedance matching procedure between the source resonation unit and a target resonation apparatus. [Reference numerals] (120) Modulation unit; (130) PA; (140) Demodulation unit; (141) Reflection power detection unit; (143) Low pass filter; (145) Envelope detection unit; (147) Comparison unit; (150) Source resonation unit; (160) Control unit; (AA) Reference signal
Abstract:
PURPOSE: An apparatus and method for protecting a power receiving terminal of a wireless power transmission system are provided to protect a power receiving terminal using a device which is shorted when a larger voltage than a critical voltage is applied. CONSTITUTION: A rectifier(1820) includes an input terminal and an output terminal. The rectifier rectifies a signal inputted to the input terminal and outputs the rectified signal to the output terminal. A capacitor(1825) is connected to the ground and the output terminal of the rectifier. A DC/DC converter(1830) is connected to a load and the output terminal of the rectifier, converts the rectified signal and outputs the converted power to the load. A device for protecting the rectifier or capacitor is shorted when a larger voltage than a critical voltage is applied to the input terminal or the output terminal of the rectifier. [Reference numerals] (1810) Resonator; (1815) Matching circuit; (1820) Rectifier; (1830) DC/DC converter; (1840) Off; (1860) Voltage controller; (1890) Load
Abstract:
PURPOSE: An apparatus and method for using wireless power transmission and NFC(Near Field Communication) are provided to exclusively use a resonator between an NFC receiver and a WPT(Wireless Power Transmission) receiver. CONSTITUTION: A resonator(1310) receives power. An NFC receiver(1360) executes wireless communication using the received power. A WPT receiver(1370) provides power for operating the operation of the power reception apparatus using the received power. A mode selection unit(1320) connects the resonator to the NFC receiver or the WPT receiver. The resonator includes the resonant frequency of 13.56Mhz. [Reference numerals] (1320) Mode selection unit; (1350) Loss matching circuit; (1360) NFC receiver; (1370) WPT receiver
Abstract:
PURPOSE: A wireless power transmission system is provided to reduce the loss of transmission power by controlling the impedance of a repeater resonator. CONSTITUTION: A power generation unit(110) converts DC(Direct Current) voltages into AC(Alternative Current) voltages using a resonant frequency. A source resonator transmits tracking power to a target resonator. A mismatching detection unit(150) detects reflected waves for the tacking power. The mismatching detection unit detects a mismatching point between the target resonator and the source resonator. A control unit(160) controls the impedance resonant frequency of a repeater resonator. [Reference numerals] (113) Voltage control unit; (141) Impedance adjusting unit; (150) Mismatching detection unit; (160) Control unit
Abstract:
PURPOSE: An electronic device and a power supply system thereof are provided to reduce power loss by transmitting resonance electricity according to electric energy which is required in a target electronic device. CONSTITUTION: A power supply system comprises a source electronic device(110) corresponding to a source, and a target electronic device(120) corresponding to a target. The source electronic device comprises a source part(111) which creates resonance electricity by receiving energy from an external voltage supply, and a source resonator(115). The source electronic device additionally comprises a matching controller(113) performing resonant frequency or impedance matching. The target electronic device comprises a target resonator(121), a matching control part(123), and a target part(125).