MAGNETIC POWER TRANSMISSION UTILIZING PHASED TRANSMITTER COIL ARRAYS AND PHASED RECEIVER COIL ARRAYS

• US 20140028111A1
• Filed: 07/29/2013
• Published: 01/30/2014
• Est. Priority Date: 07/27/2012
• Status: Active Grant

• Current Assignee: TC1 LLC (Abbott Laboratories Incorporated)
• Original Assignee: TC1 LLC (Abbott Laboratories Incorporated)
• Inventors: Peterson, Ethan, Hansen, John Freddy
• Granted Patent: US 9,805,863 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: A61N 1/37229 Shape or location of the implanted or external antenna
• CPC Class Codes: A61N 1/3787 from an external energy source
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

An improved wireless transmission system for transferring power over a distance. The system includes a transmitter generating a magnetic field and a receiver for inducing a voltage in response to the magnetic field. In some embodiments, the transmitter can include a plurality of transmitter resonators configured to transmit wireless power to the receiver. The transmitter resonators can be disposed on a flexible substrate adapted to conform to a patient. In one embodiment, the polarities of magnetic flux received by the receiver can be measured and communicated to the transmitter, which can adjust polarities of the transmitter resonators to optimize power transfer. Methods of use are also provided.

Claims

1. A wireless power transfer system, comprising:

a flexible substrate adapted to conform to the body of a patient;

a first transmitter resonator disposed on the flexible substrate;

a second transmitter resonator disposed on the flexible substrate, the second transmitter resonator being in electronic communication with the first transmitter resonator;

a receiver resonator; and

a transmit controller configured to drive the first and second transmitter resonators to deliver wireless energy to the receiver resonator.

2. The system of claim 1 wherein the flexible substrate comprises a flexible fabric.

3. The system of claim 1 wherein the flexible substrate is a material selected from the group consisting of Kapton, a polymide film, a polyester film, a cloth, and a rubber.

4. The system of claim 3, wherein the flexible substrate is covered with a padding to better match a contour of the body.

5. The system of claim 1 wherein the second transmitter resonator is driven out-of-phase from the first transmitter resonator.

6. The system of claim 1 wherein the first and second resonators coils are substantially rigid.

7. The system of claim 1 wherein the transmit controller is configured to operate in a test mode to drive the first transmitter resonator individually while a receive controller in the receiver resonator is configured to record a polarity of the magnetic flux received from the first transmitter resonator.

8. The system of claim 7 wherein the transmit controller is further configured to drive the second transmitter resonator individually while the receive controller in the receiver resonator is configured to record a polarity of the magnetic flux received from the second transmitter resonator.

9. The system of claim 7 wherein the receive controller is configured to communicate the measured polarity of the magnetic flux received from the first transmitter resonator to the transmit controller, and the transmit controller is configured to adjust transmission of power from the first transmitter resonator based on the measured polarity.

10. The system of claim 8 wherein the receive controller is configured to communicate the measured polarity of the magnetic flux received from the second transmitter resonator to the transmit controller, and the transmit controller is configured to adjust transmission of power from the second transmitter resonator based on the measured polarity.

11. A method of adjusting wireless power transmission in a TET system, comprising the steps of:

transmitting power from a first transmitter resonator external to a patient to a receiver resonator implanted within the patient;

measuring a first polarity of magnetic flux received by the receiver resonator;

transmitting power from a second transmitter resonator external to the patient to the receiver resonator implanted within the patient;

measuring a second polarity of magnetic flux received by the receiver resonator;

communicating the measured first and second polarities from the receiver resonator to a controller of the first and second transmitter resonators; and

adjusting transmission of power from the first and second transmitter resonators based on the measured first and second polarities.

12. The method of claim 11, wherein the adjusting step comprises reversing a polarity of the first transmitter resonator.

13. The method of claim 11, wherein the adjusting step comprises reversing a polarity of the second transmitter resonator.

14. The method of claim 11, wherein the adjusting step comprises turning off the first transmitter resonator.

15. The method of claim 11, wherein the adjusting step comprises turning off the second transmitter resonator.

16. The method of claim 11, wherein the adjusting step comprises adjusting a polarity of one or more of the first and second transmitter resonators to maximize power received by the receiver resonator.

17. A wireless power transmitter, comprising:

coil circuitry including at least two transmit resonators; and

driver circuitry including a voltage source, the driver circuitry configured to excite the coil circuitry to transmit wireless power from the at least two transmit resonators to a receiver.

18. The transmitter of claim 17 wherein the coil circuitry includes four transmit resonators.

19. The transmitter of claim 18 wherein the four transmit resonators are arranged in a 2×

2 array.

20. The transmitter of claim 17 wherein the transmit resonators are operated out of phase.

21. The transmitter of claim 17 wherein the transmit resonators are operated in phase.

22. The transmitter of claim 17 wherein at least one of the transmit resonators is operated in phase and at least one of the transmit resonators is operated out of phase.

23. A wireless power transfer system, comprising:

first and second transmitter resonators configured to transmit wireless power to a receiver resonator implanted within a patient;

a receive controller configured to measuring first and second polarities of magnetic flux received by the receiver resonator from the first and second transmitter resonators, respectively, the receive controller configured to communicate the measured first and second polarities to a transmit controller of the first and second transmitter resonators;

the transmit controller being configured to adjust transmission of power from the first and second transmitter resonators to the receiver resonator based on the measured first and second polarities to maximize power transfer.