Systems and methods for wireless power resonators with core cavity

Patent metadata

Field	Value
Publication number	US-2021384771-A1
Application number	US-202117341818-A
Country	US
Kind code	A1
Filing date	Jun 8, 2021
Priority date	Jun 8, 2020
Publication date	Dec 9, 2021
Grant date	—

Abstract

A resonator for use in a wireless power transfer system is provided. The resonator includes a core including a front surface, a back surface, and an annular sidewall extending between the front surface and the back surface, wherein an annular groove is defined in the front surface and surrounds a post, and wherein a cavity is defined in the back surface, the post and the cavity aligned with a longitudinal axis of the core. The resonator further includes a coil element disposed within the annular groove.

First claim

What is claimed is:

1 . A resonator for use in a wireless power transfer system, the resonator comprising:
a core comprising:
a front surface;
a back surface; and
an annular sidewall extending between the front surface and the back surface, wherein an annular groove is defined in the front surface and surrounds a post, and wherein a cavity is defined in the back surface, the post and the cavity aligned with a longitudinal axis of the core; and
a coil element disposed within the annular groove.

2 . The resonator of claim 1 , further comprising at least one electronics component disposed within the cavity.

3 . The resonator of claim 2 , wherein the cavity is potted with a thermally insulating material configured to channel heat generated by the at least one electronics component toward a rear of the resonator.

4 . The resonator of claim 1 , wherein the cavity has a diameter of approximately 20 millimeters and a depth of approximately 4 millimeters.

5 . The resonator of claim 1 , wherein the resonator comprises an implantable receive resonator.

6 . The resonator of claim 1 , wherein the resonator comprises an external transmit resonator.

7 . The resonator of claim 1 , wherein the coil element comprises a plurality of stacked plates.

8 . The resonator of claim 1 , wherein the coil element comprises a plurality of loops of Litz wire.

9 . The resonator of claim 1 , wherein a recess is defined in the back surface, and wherein the recess is shallower than the cavity.

10 . The resonator of claim 1 , wherein the cavity is filled with a gas that facilitates transferring heat from a front of the resonator to a back of the resonator.

11 . A wireless power transfer system comprising:
a power source; a transmit resonator electrically coupled to the power source; a load; and an implantable receive resonator electrically coupled to the load, the implantable receive resonator configured to receive wireless power from the transmit resonator, the implantable receive resonator comprising:
a core comprising:
a front surface;
a back surface; and
an annular sidewall extending between the front surface and the back surface, wherein an annular groove is defined in the front surface and surrounds a post, and wherein a cavity is defined in the back surface, the post and the cavity aligned with a longitudinal axis of the core; and

a coil element disposed within the annular groove.

12 . The wireless power transfer system of claim 11 , wherein the resonator further comprises at least one electronics component disposed within the cavity.

13 . The wireless power transfer system of claim 11 , wherein the cavity is defined by an annular cavity sidewall and a bottom wall.

14 . The wireless power transfer system of claim 13 , wherein the cavity has a diameter of approximately 20 millimeters and a depth of approximately 4 millimeters.

15 . The wireless power transfer system of claim 11 , wherein the coil element comprises a plurality of stacked plates.

16 . The wireless power transfer system of claim 11 , wherein the coil element comprises a plurality of loops of Litz wire.

17 . The wireless power transfer system of claim 11 , wherein a recess is defined in the back surface, and wherein the recess is shallower than the cavity.

18 . The wireless power transfer system of claim 11 , wherein the cavity is filled with a gas that facilitates transferring heat from a front of the resonator to the back of the resonator.

19 . A method of assembling a wireless power transfer system, the method comprising:
electrically coupling a power source to an external transmit resonator; and electrically coupling a load to an implantable receive resonator, the implantable receive resonator configured to receive wireless power from the transmit resonator, the implantable receive resonator including a core including a front surface, a back surface, and an annular sidewall extending between the front surface and the back surface, wherein an annular groove is defined in the front surface and surrounds a post, and wherein a cavity is defined in the back surface, the post and the cavity aligned with a longitudinal axis of the core.

20 . The method of claim 19 , further comprising positioning at least one electronics component within the cavity.

Assignees

• Tc1 Llc

Inventors

• Hansen John Freddy
• Anderson Russell
• Harjes Daniel I
• Baval Alexander
• Iudice Jeffrey

Classifications

• H02J2105/46

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

• A61M60/873

  specially adapted for wireless or transcutaneous energy transfer [TET], e.g. inductive charging · CPC title

• A61M60/178

  drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices · CPC title

• A61M60/216

  including a rotating member acting on the blood, e.g. impeller · CPC title

• H01F2027/2809

  on stacked layers · CPC title