Patent ID: 9246358
Filing Date: 2016-01-26
CPC Classification: H02J,H04B

Claim Text:
1. A wireless power transmitting apparatus comprising: a power transmitting coil configured to wirelessly transmit a power to a power receiving apparatus; a signal detecting apparatus configured to detect a transmission signal including a unique ID signal and a power charging information signal, transmitted by the power receiving apparatus, by using a magnetic field change of the power transmitting coil according to the transmission signal; a power transmitting controlling unit configured to control that the power is wirelessly transmitted to the power receiving apparatus and judges a charged state of the power receiving apparatus using the transmission signal detected by the signal detecting apparatus; a driving driver configured to generate a driving signal under the control of the power transmitting controlling unit; and a series resonant converter configured to switch a direct current (DC) power according to the driving signal and output the switched power to the power transmitting coil, wherein the signal detecting apparatus comprises: a magnetic field change signal detecting unit configured to detect the magnetic field change signal of the power transmitting coil which is generated according to the transmission signal; and a signal extracting unit configured to extract the transmission signal transmitted by the power receiving apparatus from the magnetic field change signal detected by the magnetic field change signal detecting unit, wherein the magnetic field change signal detecting unit comprises a resonance tank circuit resonated by the magnetic field change signal of the power transmitting coil to generate a resonance signal, wherein the resonance tank circuit comprises: an RFID transponder configured to detect the magnetic field change signal of the power transmitting coil; and a capacitor connected in parallel with the RFID transponder to allow resonance to be generated by the magnetic field change signal of the power transmitting coil.