Systems and methods for wireless power resonators with counter-coil

Patent metadata

Field	Value
Publication number	US-2025023390-A1
Application number	US-202218712500-A
Country	US
Kind code	A1
Filing date	Nov 29, 2022
Priority date	Dec 3, 2021
Publication date	Jan 16, 2025
Grant date	—

Abstract

Systems and methods for a wireless power transfer system are provided. A resonator arrangement includes a housing, a magnetic core positioned within the housing and defining an annular groove, a coil element positioned within the annular groove and configured to generate a first magnetic field, and a counter-coil element positioned proximate the coil element, the counter-coil element configured to generate a second magnetic field that is out of phase with the first magnetic field to facilitate reducing far-field electromagnetic emissions.

First claim

What is claimed is:

1 . A resonator arrangement for use in a wireless power transfer system, the resonator arrangement comprising:
a housing; a magnetic core positioned within the housing and defining an annular groove; a coil element positioned within the annular groove and configured to generate a first magnetic field; and a counter-coil element positioned proximate the coil element, the counter-coil element configured to generate a second magnetic field that is out of phase with the first magnetic field to facilitate reducing far-field electromagnetic emissions.

2 . The resonator arrangement of claim 1 , wherein the counter-coil element is positioned outside of the housing.

3 . The resonator arrangement of claim 2 , wherein the magnetic core is a first magnetic core defining a first annular groove, and wherein the resonator arrangement further comprises a second magnetic core, the counter-coil element positioned within a second annular groove defined by the second magnetic core.

4 . The resonator arrangement of claim 1 , wherein the counter-coil element is positioned within the housing.

5 . The resonator arrangement of claim 4 , wherein the magnetic core further defines an additional annular groove, the counter-coil element positioned within the additional annular groove.

6 . The resonator arrangement of claim 1 , wherein the coil element is a transmit coil element, and wherein the first magnetic field is operable to induce a current in a receive coil element.

7 . The resonator arrangement of claim 6 , wherein the counter-coil element is positioned on a side of the transmit coil element opposite the receive coil element.

8 . A transcutaneous energy transfer system (TETS) comprising:
a transmit resonator comprising:
a first housing;
a first magnetic core defining a first annular groove; and
a transmit coil element positioned within the first annular groove and configured to generate a first magnetic field:
an implantable receive resonator comprising:
a second housing;
a second magnetic core defining a second annular groove; and
a receive coil element positioned within the second annular groove, wherein the first magnetic field is configured to induce a current in the receive coil element; and
a counter-coil element positioned proximate the transmit coil element, the counter-coil element configured to generate a second magnetic field that is out of phase with the first magnetic field to facilitate reducing far-field electromagnetic emissions.

9 . The TETS of claim 8 , wherein the counter-coil element is positioned outside of the first housing.

10 . The TETS of claim 9 , further comprising a third magnetic core defining a third annular groove, the counter-coil element positioned within the third annular groove.

11 . The TETS of claim 10 , wherein the third magnetic core is coupled to the first housing.

12 . The TETS of claim 8 , wherein the counter-coil element is positioned within the first housing.

13 . The TETS of claim 12 , wherein the first magnetic core further defines a third annular groove, the counter-coil element positioned within the third annular groove.

14 . The TETS of claim 13 , wherein the first annular groove and the third annular groove face in opposite directions.

15 . A method of assembling a resonator arrangement for use in a wireless power transfer system, the method comprising:
positioning a magnetic core within a housing, the magnetic core defining an annular groove; positioning a coil element within the annular groove, the coil element configured to generate a first magnetic field; and positioning a counter-coil element proximate the coil element, the counter-coil element configured to generate a second magnetic field that is out of phase with the first magnetic field to facilitate reducing far-field electromagnetic emissions.

16 . The method of claim 15 , wherein positioning the counter-coil element comprises positioning the counter-coil element outside of the housing.

17 . The method of claim 16 , wherein the magnetic core is a first magnetic core defining a first annular groove, and wherein the method further comprises positioning the counter-coil element within a second annular groove defined by a second magnetic core.

18 . The method of claim 17 , further comprising coupling the second magnetic core to the housing.

19 . The method of claim 15 , wherein positioning the counter-coil element comprises positioning the counter-coil element within the housing.

20 . The method of claim 19 , wherein positioning the counter-coil element within the housing comprises positioning the counter-coil element within an additional groove defined by the magnetic core.

Assignees

• Tc1 Llc

Inventors

• Hansen John Freddy
• Anderson Russell Eugene
• Keen Rachel
• Harjes Daniel I
• Johnson Jared Richard

Classifications

• H02J2105/46

  Medical devices, medical implants or life supporting devices · CPC title

• H01F38/14

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title

• H01F27/28

  Coils; Windings; Conductive connections · CPC title

• H01F27/24

  Magnetic cores · CPC title

• A61M2207/00

  Methods of manufacture, assembly or production · CPC title