AUTOMATIC TUNING FOR WIRELESS POWER TRANSFER
First Claim
1. A device for a wireless power transfer system (e.g., 200), the system having a wireless power transmitter (TX) (e.g., 202) and a wireless power receiver (RX) (e.g., 204), wherein:
- the wireless power transmitter comprises;
a TX resonant circuit (e.g., 210) that resonates at a TX resonant frequency; and
a signal generator (e.g., 206) that applies a generator signal having a generator frequency to the TX resonant circuit;
the wireless power receiver comprises an RX resonant circuit (e.g., 218) that resonates at an RX resonant frequency;
at least one of the wireless power transmitter and the wireless power receiver comprises a power detector (e.g., 216/226) that measures power in the corresponding resonant circuit;
at least one of the wireless power transmitter and the wireless power receiver comprises an auto-tuner (e.g., 214/224) that generates at least one tuning parameter (e.g., sT,1, sT,2, SR) based on the measured power;
the at least one tuning parameter is used to adjust at least one of the generator frequency, the TX resonant frequency, and the RX resonant frequency;
the device is one of the wireless power transmitter and the wireless power receiver; and
the device comprises at least one of the power detector and the auto-tuner.
2 Assignments
0 Petitions
Accused Products
Abstract
In one embodiment, a wireless power transfer system has a wireless power transmitter and receiver. The transmitter has a transmitting resonant circuit that resonates at a first frequency and a signal generator that generates a signal at a second frequency. The transmitter also has a power detector that measures reflected power at the transmitting resonant circuit, and an auto-tuner that generates transmitter tuning parameters for adjusting the first and second frequencies to reduce reflected power. The receiver has a receiving resonant circuit that resonates at a third frequency based on a receiver tuning parameter. The receiver tuning parameter is generated by a power detector that measures power generated at the receiving resonant circuit, and an auto-tuner that generates the receiver tuning parameter to increase the load power.
93 Citations
23 Claims
-
1. A device for a wireless power transfer system (e.g., 200), the system having a wireless power transmitter (TX) (e.g., 202) and a wireless power receiver (RX) (e.g., 204), wherein:
-
the wireless power transmitter comprises; a TX resonant circuit (e.g., 210) that resonates at a TX resonant frequency; and a signal generator (e.g., 206) that applies a generator signal having a generator frequency to the TX resonant circuit; the wireless power receiver comprises an RX resonant circuit (e.g., 218) that resonates at an RX resonant frequency; at least one of the wireless power transmitter and the wireless power receiver comprises a power detector (e.g., 216/226) that measures power in the corresponding resonant circuit; at least one of the wireless power transmitter and the wireless power receiver comprises an auto-tuner (e.g., 214/224) that generates at least one tuning parameter (e.g., sT,1, sT,2, SR) based on the measured power; the at least one tuning parameter is used to adjust at least one of the generator frequency, the TX resonant frequency, and the RX resonant frequency; the device is one of the wireless power transmitter and the wireless power receiver; and the device comprises at least one of the power detector and the auto-tuner. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A wireless power transfer system (e.g., 200) comprising a wireless power transmitter (TX) (e.g., 202) and a wireless power receiver (RX) (e.g., 204), wherein:
-
the wireless power transmitter comprises; a TX resonant circuit (e.g., 210) that resonates at a TX resonant frequency; and a signal generator (e.g., 206) that applies a generator signal having a generator frequency to the TX resonant circuit; the wireless power receiver comprises an RX resonant circuit (e.g., 218) that resonates at an RX resonant frequency; at least one of the wireless power transmitter and the wireless power receiver comprises a power detector (e.g., 216/226) that measures power in the corresponding resonant circuit; at least one of the wireless power transmitter and the wireless power receiver comprises an auto-tuner (e.g., 214/224) that generates at least one tuning parameter (e.g., sT,1, sT,2, SR) based on the measured power; and the at least one tuning parameter is used to adjust at least one of the generator frequency, the TX resonant frequency, and the RX resonant frequency. - View Dependent Claims (21, 22)
-
-
23. A method for tuning a device in a wireless power transfer system (e.g., 200), the system having a wireless power transmitter (TX) (e.g., 202) and a wireless power receiver (RX) (e.g., 204), wherein:
-
the wireless power transmitter comprises; a TX resonant circuit (e.g., 210) that resonates at a TX resonant frequency; and a signal generator (e.g., 206) that applies a generator signal having a generator frequency to the TX resonant circuit; the wireless power receiver comprises an RX resonant circuit (e.g., 218) that resonates at an RX resonant frequency; and the method comprises; (a) detecting (e.g., 216/226) power in at least one of the wireless power transmitter and the wireless power receiver; (b) generating (e.g., 214/224) at least one tuning parameter (e.g., sT,1, sT,2, sR) based on the measured power; and (c) adjusting at least one of the generator frequency, the TX resonant frequency, and the RX resonant frequency based on the at least one tuning parameter.
-
Specification