Wireless power transmission device

Abstract

A wireless power transmission device includes a power transmitter, a first transmission unit, a power receiver, a feedback regulator, a receive controller, and a second transmission unit. The power transmitter is for generating power, and the first transmission unit is for wirelessly transmitting power generated by the power transmitter. The power receiver is for receiving and rectifying the power from the first transmission unit. The feedback regulator is for receiving a feedback signal from the power receiver to generate an AC control signal. The receive controller is for receiving the control signal to generate a driving signal. The second transmission unit is for wirelessly transmitting the control signal to the receive controller.

What is claimed is: 
     
         1 . A wireless power transmission device comprising:
 a power transmitter for generating power;   a first transmission unit coupled to the power transmitter for wirelessly transmitting the power generated by the power transmitter;   a power receiver coupled to the first transmission unit for receiving and rectifying the power from the first transmission unit;   a feedback regulator comprising:
 a feedback receiver coupled to the power receiver for receiving a feedback signal from the power receiver; and 
 a command adjuster coupled to the feedback receiver for generating an AC control signal; 
   a receive controller comprising:
 a feedback judge controller for receiving the control signal; and 
 a control adjuster coupled to the feedback judge controller and the power transmitter for generating a driving signal to adjust the power generated by the power transmitter; and 
   a second transmission unit coupled between the feedback regulator and the receive controller for wirelessly transmitting the control signal to the receive controller.   
     
     
         2 . The wireless power transmission device of  claim 1  wherein the command adjuster comprises:
 a digital frequency modulator coupled between the feedback receiver and the second transmission unit for generating a frequency signal according to a rectified feedback signal; and 
 a resonant tank coupled to the digital frequency modulator for generating the control signal according to the frequency signal. 
 
     
     
         3 . The wireless power transmission device of  claim 1  wherein the command adjuster comprises:
 a digital frequency modulator coupled between the feedback receiver and the second transmission unit for generating a frequency signal according to a rectified feedback signal; and 
 an amplify circuit coupled to the digital frequency modulator for generating the control signal by amplifying the frequency signal. 
 
     
     
         4 . The wireless power transmission device of  claim 1  wherein the feedback receiver further comprises:
 a rectifier coupled to the power receiver for rectifying the feedback signal; 
 a duty modulator coupled to the rectifier; 
 an inductor coupled to the rectifier; and 
 a switch for generating a duty signal according to the rectified feedback signal.