Patent ID: 8874031
Filing Date: 2014-10-28
Classification: H02J,H04B

Abstract:
1. A radio power transmitting apparatus comprising: a power transmitting coil configured to be supplied with a signal and transmit the signal to a power receiving coil of a radio power receiving apparatus through magnetic coupling; a band signal generating unit configured to generate a band signal having an allowable transmission band and supply the band signal to the power transmitting coil as the signal; a reflected signal measuring unit configured to measure a reflected signal of the band signal from the power transmitting coil; an oscillator configured to generate a carrier signal having a controllable oscillating frequency; and a communication control unit configured to determine a transmission frequency based on a frequency characteristic of the reflected signal and perform control so that a transmission signal generated by modulating the carrier signal of the transmission frequency is supplied to the power transmitting coil as the signal, wherein: the communication control unit determines a frequency of the carrier signal for load modulation to be transmitted to the radio power receiving apparatus based on the frequency characteristic of the reflected signal, the carrier signal of the determined frequency is supplied to the power transmitting coil, the radio power transmitting apparatus further comprises a symbol cycle control unit configured to determine a symbol cycle of the carrier signal for load modulation based on the frequency characteristic of the reflected signal, and the communication control unit performs control so that the carrier signal for load modulation is transmitted in the determined symbol cycle.