Wireless energy transfer with variable size resonators for medical applications
First Claim
1. A medical device-powering wireless receiver for use with a first electromagnetic resonator coupled to a power supply, the first electromagnetic resonator having a mode with a resonant frequency ω
-
1, an intrinsic loss rate Γ
1, and a first Q-factor Q1=ω
1/2Γ
1, the wireless receiver comprising;
a load configured to power an implantable medical device using electrical power, wherein the load has an associated lossy object; and
a second electromagnetic resonator adapted to be integrated with the implantable medical device or the load, the second electromagnetic resonator having a mode with a resonant frequency ω
2, an intrinsic loss rate Γ
2, and a second Q-factor Q2=ω
2/2Γ
2;
wherein the second electromagnetic resonator is configured to be wirelessly coupled to the first electromagnetic resonator to provide resonant, non-radiative wireless power to the second electromagnetic resonator from the first electromagnetic resonator;
wherein the second electromagnetic resonator is configured to tailor electromagnetic fields with respect to the lossy object; and
wherein the square root of the product of the respective Q factors is greater than 100.
1 Assignment
0 Petitions
Accused Products
Abstract
A medical device-powering wireless receiver for use with a first electromagnetic resonator coupled to a power supply. The wireless receiver includes a load configured to power an implantable medical device using electrical power, and a second electromagnetic resonator adapted to be housed within the medical device and configured to be coupled to the load, wherein the second electromagnetic resonator is configured to be wirelessly coupled to the first electromagnetic resonator to provide resonant, non-radiative wireless power to the second electromagnetic resonator from the first electromagnetic resonator, the area circumscribed by the inductive element of at least one of the electromagnetic resonators can be varied to improve performance.
740 Citations
24 Claims
-
1. A medical device-powering wireless receiver for use with a first electromagnetic resonator coupled to a power supply, the first electromagnetic resonator having a mode with a resonant frequency ω
-
1, an intrinsic loss rate Γ
1, and a first Q-factor Q1=ω
1/2Γ
1, the wireless receiver comprising;a load configured to power an implantable medical device using electrical power, wherein the load has an associated lossy object; and a second electromagnetic resonator adapted to be integrated with the implantable medical device or the load, the second electromagnetic resonator having a mode with a resonant frequency ω
2, an intrinsic loss rate Γ
2, and a second Q-factor Q2=ω
2/2Γ
2;wherein the second electromagnetic resonator is configured to be wirelessly coupled to the first electromagnetic resonator to provide resonant, non-radiative wireless power to the second electromagnetic resonator from the first electromagnetic resonator; wherein the second electromagnetic resonator is configured to tailor electromagnetic fields with respect to the lossy object; and wherein the square root of the product of the respective Q factors is greater than 100. - View Dependent Claims (2, 3, 4, 5, 6)
-
1, an intrinsic loss rate Γ
-
7. A power source for wirelessly providing power to a wireless receiver of an electrically powered implantable medical device, the power source comprising:
-
a power supply, the power supply configured to supply power at a rate sufficient to charge the implantable medical device; and a first electromagnetic resonator coupled to the power supply and having a mode with a resonant frequency ω
1, an intrinsic loss rate Γ
1, and a first Q-factor Q1=ω
1/2Γ
1;wherein the first electromagnetic resonator is configured to be wirelessly coupled to a second electromagnetic resonator integrated with the implantable medical device or a load associated with the implantable medical device to provide non-radiative wireless power to the second electromagnetic resonator, the second electromagnetic resonator having a mode with a resonant frequency ω
2, an intrinsic loss rate Γ
2, and a second Q-factor Q2=ω
2/2Γ
2;wherein the first electromagnetic resonator has an associated lossy object, and the first electromagnetic resonator is configured to tailor electromagnetic fields with respect to the lossy object; and wherein the square root of the product of the respective Q factors is greater than 100. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A medical device wireless power system, comprising:
-
a power supply, the power supply configured to supply power at a rate sufficient to charge an implantable medical device; a first electromagnetic resonator coupled to the power supply and having a mode with a resonant frequency ω
1, an intrinsic loss rate Γ
1, and a first Q-factor Q1=ω
1/2Γ
1, the first electromagnetic resonator having an associated first lossy object, and the first electromagnetic resonator comprising a magnetic shield to reduce a strength of generated magnetic fields in a specific direction and create a non-symmetric active area with respect to the first lossy object;a load configured to power the implantable medical device using electrical power, wherein the load has an associated second lossy object; and a second electromagnetic resonator associated with the implantable medical device and configured to be coupled to the load, the second electromagnetic resonator having a mode with a resonant frequency ω
2, an intrinsic loss rate Γ
2, and a second Q-factor Q2=ω
2/2Γ
2;wherein the first electromagnetic resonator is configured to be wirelessly coupled to the second electromagnetic resonator associated with the implantable medical device to provide non-radiative wireless power to the second electromagnetic resonator; wherein the second electromagnetic resonator is configured to tailor electromagnetic fields with respect to the second lossy object; and wherein the square root of the product of the respective Q factors is greater than 100. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
Specification