Magnetic power transmission utilizing phased transmitter coil arrays and phased receiver coil arrays

• US 10,637,303 B2
• Filed: 10/04/2018
• Issued: 04/28/2020
• Est. Priority Date: 07/27/2012
• Status: Active Grant

• Current Assignee: TC1 LLC (Abbott Laboratories Incorporated)
• Original Assignee: TC1 LLC (Abbott Laboratories Incorporated)
• Inventors: Hansen, John Freddy, Petersen, Ethan
• Primary Examiner(s): Amaya, Carlos
• Assistant Examiner(s): Shiao, David A
• Application Number:
  US16/151,458
• Publication Number:
  US 20190044394A1
• Time in Patent Office: 572 Days
• 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 first transmitter resonator;

a second 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, wherein the transmit controller is configured 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, and wherein the polarity of the magnetic flux is defined by a direction in which the magnetic flux passes through the receiver resonator.

2. The system of claim 1 wherein the first and second transmitter resonators are disposed on a flexible substrate.

3. The system of claim 2 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 a body of a patient.

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 transmitter resonators are rigid.

7. The system of claim 1 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.

8. The system of claim 7 wherein the receive controller is configured to:

detect a decrease in a power transfer rate between the first and second transmitter resonators and the receiver resonator; and

transmit an alert to the transmit controller in response to detecting the decrease, wherein the alert causes the transmit controller to initiate a new test mode.

9. The system of claim 1 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 1, further comprising a variable capacitor electrically coupled to the first and second transmitter resonators to compensate for mutual inductance changes due to changes in polarity of the first and second transmitter resonators.

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

transmitting power from a first transmitter resonator to a receiver resonator;

measuring a first polarity of magnetic flux received by the receiver resonator from the first transmitter resonator, wherein the first polarity of the magnetic flux is defined by a direction in which the magnetic flux passes through the receiver resonator;

transmitting power from a second transmitter resonator to the receiver resonator;

measuring a second polarity of magnetic flux received by the receiver resonator from the second transmitter resonator, wherein the second polarity of the magnetic flux is defined by a direction in which the magnetic flux passes through the receiver resonator; 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.