Wireless power receiver having transfer optimization and method thereof

Abstract

According to one aspect of the present disclosed subject matter, a receiver inductively powered by a transmitter for powering a load, the receiver comprising: a resonance circuit capable of tuning its resonance frequency for coupling with the transmitter and generate AC voltage; a power supply section configured to rectify the AC voltage and adjust a DC current and a DC voltage to the load; and a control and communication section designed to set parameters for the receiver and communicate operation points (OP) to the transmitter, wherein the parameters and the OP derived from determining a minimal power loss of the receiver.

1 . (canceled) 
     
     
         2 . A receiver inductively powered by a transmitter, the receiver comprising:
 a control and communication section configured to set parameters for the receiver and communicate operation points (OP) to the transmitter, the parameters and the OP are derived from calculating power losses for different input voltages to the receiver and determining a minimal power loss of the receiver from the power losses.   
     
     
         3 . The receiver of  claim 2 , wherein the power losses comprises a magnetic circuit loss, a rectifier power loss, and a direct-current-to-direct-current (DC-to-DC) convertor power loss. 
     
     
         4 . The receiver of  claim 3 , wherein a receiver power loss comprises a sum of the magnetic circuit loss, the rectifier power loss, and the DC-to-DC convertor power loss. 
     
     
         5 . The receiver of  claim 4 , wherein the receiver power loss is checked against a lowest possible power loss to determining the minimal power loss. 
     
     
         6 . The receiver of  claim 5 , wherein the lowest possible power loss comprises a calculated power loss value of a cycle that precedes a last cycle when the calculated power loss value of the last cycle is higher than a value of the last cycle. 
     
     
         7 . The receiver of  claim 6 , wherein Thereby, the calculated power loss value of the last cycle represents the minimal power loss of the receiver. 
     
     
         8 . The receiver of  claim 5 , wherein the minimal power loss of the receiver comprises a value of a cycle that yields a best calculated power loss value out of all cycles of a scan. 
     
     
         9 . The receiver of  claim 2 , wherein the minimal power loss is set as a default configuration of the receiver. 
     
     
         10 . The receiver of  claim 2 , wherein the parameters comprise a voltage in, a voltage out, and a direct current of the receiver. 
     
     
         11 . The receiver of  claim 2 , wherein the receiver comprises:
 a power supply section configured to rectify an alternating current (AC) voltage and adjust a direct current (DC) voltage and a DC current to power a load.   
     
     
         12 . The receiver of  claim 11 , wherein the power supply section comprises a rectifier comprises one or more holding capacitors and one or more field-effect transistor (FET) switches, wherein each FET switch is separately gated for charging the one or more holding capacitors. 
     
     
         13 . The receiver of  claim 12 , wherein a gate of a first FET of the one or more FET switches is open during a half of a AC cycle for charging a first holding capacitor of the one or more holding capacitors. 
     
     
         14 . The receiver of  claim 13 , wherein a gate of a second FET of the one or more FET switches is open during another half of the AC cycle for charging a second holding capacitor of the one or more holding capacitors. 
     
     
         15 . The receiver of  claim 14 , wherein the first and second holding capacitors are connected to produce an output voltage that is twice an absolute value of one half. 
     
     
         16 . The receiver of  claim 11 , wherein the power supply section comprises a DC-to-DC convertor (DC2DC). 
     
     
         17 . The receiver of  claim 2 , wherein the receiver comprises:
 a resonance circuit configured to couple with the transmitter and generate an alternating current (AC) voltage.   
     
     
         18 . The receiver of  claim 17 , wherein the resonance circuit comprises a coil and a serial capacitor. 
     
     
         19 . The receiver of  claim 17 , wherein the resonance circuit comprises a coil and one or more of an equivalent capacitor, a parallel capacitor, and at least resonance capacitor. 
     
     
         20 . The receiver of  claim 17 , wherein the resonance circuit comprises one or more switchable branches of at least one resonance capacitor. 
     
     
         21 . The receiver of  claim 20 , wherein the control and communication section is configured to activate one of the one or more switchable branches for tuning resonance frequency of the resonance circuit.