Patent ID: 9130389
Filing Date: 2015-09-08
Classification: H02J

Abstract:
1. An apparatus for wireless power transmission, comprising: a plurality of power transmission antennas configured to transmit a wireless power signal in a magnetic resonance manner by using resonant frequencies, the resonant frequencies having different bandwidths from each other; a wireless power signal generating module configured to generate the wireless power signal; a plurality of wireless power converting modules configured to convert a power level of the wireless power signal generated by the wireless power signal generating module, the wireless power converting modules having different power level conversion ranges from each other corresponding to the bandwidths of the resonant frequencies of the power transmission antenna; a multiplexer matching module configured to selectively connect the wireless power converting modules to a corresponding power transmission antennas and to match impedances between the connected wireless power converting modules and the power transmission antennas; a wireless communication module configured to send a detecting signal to detect a device to be charged, and configured to perform data communication with the detected device to be charged; and a controller configured to calculate a required power of the device to be charged, based on a charge state information of the device which received by the wireless communication module and, configured to select the power transmission antennas and the wireless power converting modules to be connected according to the required power of the device to be charged, to adjust the power level of the wireless power signal, wherein the plurality of wireless power converting modules respectively include amplifiers with different gains, and the amplifiers convert the wireless power signal in different power level conversion ranges according to the gains.