Wireless non-radiative energy transfer
First Claim
Patent Images
1. A wireless power system comprising:
- a source module comprising a source resonator and a power supply coupled to the source resonator to provide power to the source resonator, the source resonator having a resonant frequency ω
1, an intrinsic loss rate Γ
1, and capable of storing electromagnetic energy with an intrinsic quality factor Q1=ω
1/(2Γ
1), the source resonator comprising at least one loop of conductive material and further comprising a capacitance; and
a portable electronic device having a device module comprising a device resonator and a load coupled to the device resonator to receive power from the device resonator and provide power to the portable electronic device, the device resonator having a resonant frequency ω
2, an intrinsic loss rate Γ
2, and capable of storing electromagnetic energy with an intrinsic quality factor Q2=ω
2/(2Γ
2), the device resonator comprising at least one loop of conductive material and further comprising a capacitance,wherein the device module is spaced from the source module and configured to move freely relative to the source module over a range of distances D between the source module and the device module,wherein the source resonator and the device resonator are configured to resonantly and wirelessly couple electromagnetic power from the source resonator to the device resonator using non-radiative electromagnetic induction having an energy transfer rate κ
, and wherein the intrinsic loss rates satisfy κ
/√
{square root over (Γ
1Γ
2)}>
2 over the range of distances D, andwherein f1=ω
1/(2π
) and f2=ω
2/(2π
), and f1 and f2, are between about 5 MHz and 380 MHz, and each intrinsic loss rate comprises a resistive component and a radiative component.
3 Assignments
0 Petitions
Accused Products
Abstract
Described herein are embodiments of a source high-Q resonator, optionally coupled to an energy source, a second high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. A third high-Q resonator, optionally coupled to an energy drain that may be located a distance from the source resonator. The source resonator and at least one of the second resonator and third resonator may be coupled to transfer electromagnetic energy from said source resonator to said at least one of the second resonator and third resonator.
419 Citations
28 Claims
-
1. A wireless power system comprising:
-
a source module comprising a source resonator and a power supply coupled to the source resonator to provide power to the source resonator, the source resonator having a resonant frequency ω
1, an intrinsic loss rate Γ
1, and capable of storing electromagnetic energy with an intrinsic quality factor Q1=ω
1/(2Γ
1), the source resonator comprising at least one loop of conductive material and further comprising a capacitance; anda portable electronic device having a device module comprising a device resonator and a load coupled to the device resonator to receive power from the device resonator and provide power to the portable electronic device, the device resonator having a resonant frequency ω
2, an intrinsic loss rate Γ
2, and capable of storing electromagnetic energy with an intrinsic quality factor Q2=ω
2/(2Γ
2), the device resonator comprising at least one loop of conductive material and further comprising a capacitance,wherein the device module is spaced from the source module and configured to move freely relative to the source module over a range of distances D between the source module and the device module, wherein the source resonator and the device resonator are configured to resonantly and wirelessly couple electromagnetic power from the source resonator to the device resonator using non-radiative electromagnetic induction having an energy transfer rate κ
, and wherein the intrinsic loss rates satisfy κ
/√
{square root over (Γ
1Γ
2)}>
2 over the range of distances D, andwherein f1=ω
1/(2π
) and f2=ω
2/(2π
), and f1 and f2, are between about 5 MHz and 380 MHz, and each intrinsic loss rate comprises a resistive component and a radiative component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A source module for a wireless power system including a portable electronic device having a device module having a device resonator and a load coupled to the device resonator to receive power from the device resonator and provide power to the portable electronic device, the device resonator having a resonant frequency ω
-
2, an intrinsic loss rate Γ
2, and capable of storing electromagnetic energy with an intrinsic quality factor Q2=ω
2/(2Γ
2),the source module comprising; a source resonator and a power supply coupled to the source resonator to provide power to the source resonator, the source resonator having a resonant frequency ω
1, an intrinsic loss rate Γ
1, and capable of storing electromagnetic energy with an intrinsic quality factor Q1=ω
1/(2Γ
1)>
100, the source resonator comprising at least one loop of conductive material and further comprising a capacitance,wherein the source module is configured to be spaced from the device module and the device module can move freely relative to the source module over a range of distances D between the source module and the device module, wherein the source resonator is configured to resonantly and wirelessly provide electromagnetic power to the device resonator using non-radiative electromagnetic induction having an energy transfer rate κ
, and wherein the intrinsic loss rates satisfy κ
/√
{square root over (Γ
1Γ
2)}>
2 over the range of distances D, andwherein f1=ω
1/(2π
) and f2=ω
2/(2π
), and f1 and f2, are between about 5 MHz and 380 MHz, and each intrinsic loss rate comprises a resistive component and a radiative component. - View Dependent Claims (19)
-
2, an intrinsic loss rate Γ
-
20. A device module for use in a wireless power system for providing power to a portable electronic device, the wireless power system including a source module having a source resonator and a power supply coupled to the source resonator to provide power to the source resonator, the source resonator having a resonant frequency φ
-
1, an intrinsic loss rate Γ
1, and capable of storing electromagnetic energy with an intrinsic quality factor Q1=ω
1/(2Γ
1),the device module comprising; a device module comprising a device resonator and a load coupled to the device resonator to receive power from the device resonator and provide power to the portable electronic device, the device resonator having a resonant frequency ω
2, an intrinsic loss rate Γ
2, and capable of storing electromagnetic energy with an intrinsic quality factor Q2=ω
2/(2Γ
2), the device resonator comprising at least one loop of conductive material and further comprising a capacitance,wherein the device module is configured to be spaced from the source module and move freely relative to the source module over a range of distances D between the source module and the device module, wherein the device resonator is configured to resonantly and wirelessly receive electromagnetic power from the source resonator using non-radiative electromagnetic induction having an energy transfer rate κ
, wherein the intrinsic loss rates satisfy κ
/√
{square root over (Γ
1Γ
2)}>
2 over the range of distances D, and wherein f1=ω
1/(2π
) and f2=ω
2/(2π
), and f1 and f2, are between about 5 MHz and 380 MHz, and each intrinsic loss rate comprises a resistive component and a radiative component, andwherein the power provided to the load from the device resonator defines a work drainage rate Γ
w, and wherein the work drainage rate Γ
w is configured to be dynamically set as a function of the energy transfer rate κ
between the first and second resonators as the device module is movable relative to the source module over the range of distances D.
-
1, an intrinsic loss rate Γ
-
21. A device module for use in a wireless power system for providing power to a portable electronic device, the wireless power system including a source module having a source resonator and a power supply coupled to the source resonator to provide power to the source resonator, the source resonator having a resonant frequency ω
-
1, an intrinsic loss rate Γ
1, and capable of storing electromagnetic energy with an intrinsic quality factor Q1=ω
1/(2Γ
1),the device module comprising; a device module comprising a device resonator and a load coupled to the device resonator to receive power from the device resonator and provide power to the portable electronic device, the device resonator having a resonant frequency ω
2, an intrinsic loss rate Γ
2, and capable of storing electromagnetic energy with an intrinsic quality factor Q2=ω
2/(2Γ
2), the device resonator comprising at least one loop of conductive material and further comprising a capacitance,wherein the device module is configured to be spaced from the source module and move freely relative to the source module over a range of distances D between the source module and the device module, wherein the device resonator is configured to resonantly and wirelessly receive electromagnetic power from the source resonator using non-radiative electromagnetic induction having an energy transfer rate κ
, wherein the intrinsic loss rates satisfy κ
/√
{square root over (Γ
1Γ
2)}>
2 over the range of distances D, and wherein f1=ω
1/(2π
) and f2=ω
2/(2π
), and f1 and f2, are between about 5 MHz and 380 MHz, and each intrinsic loss rate comprises a resistive component and a radiative component, andwherein the power provided to the load from the device resonator defines a work drainage rate Γ
w, and wherein the work drainage rate Γ
w is configured to be set such that the ratio of useful-to-lost power is maximized for some value of the energy transfer rate κ
in the range of distances D as the device module is moveable relative to the source module over the range of distances D. - View Dependent Claims (22)
-
1, an intrinsic loss rate Γ
-
23. A method for providing power wirelessly to a portable electronic device, wherein the portable electronic device is configured for use with a source module having a source resonator and a power supply coupled to the source resonator to provide power to the source resonator, the source resonator having a resonant frequency ω
-
1, an intrinsic loss rate Γ
1, and capable of storing electromagnetic energy with an intrinsic quality factor Q1=ω
1/(2Γ
1), the method comprising;providing the portable electronic device with a device resonator and a load coupled to the device resonator to receive power from the device resonator and provide power to the portable electronic device, the device resonator having a resonant frequency ω
2, an intrinsic loss rate Γ
2, and capable of storing electromagnetic energy with an intrinsic quality factor Q2=ω
2/(2Γ
2), the device resonator comprising at least one loop of conductive material and further comprising a capacitance, wherein the device module is spaced from the source module and configured to move freely relative to the source module over a range of distances D between the source module and the device module; andresonantly and wirelessly receiving electromagnetic power at the device resonator from the source resonator using non-radiative electromagnetic induction having an energy transfer rate κ
, wherein the intrinsic loss rates satisfy κ
/√
{square root over (Γ
1F2)}>
1 over the range of distances D, wherein f1=ω
1/(2π
) and f2=ω
2/(2π
), and f1 and f2, are between about 5 MHz and 380 MHz, and wherein each intrinsic loss rate comprises a resistive component and a radiative component. - View Dependent Claims (24, 25, 26, 27, 28)
-
1, an intrinsic loss rate Γ
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeMassachusetts Institute of Technology
-
Original AssigneeMassachusetts Institute of Technology
-
InventorsJoannopoulos, John D., Karalis, Aristeidis, Soljacic, Marin
-
Primary Examiner(s)Fleming, Fritz M
-
Application NumberUS14/302,662Publication NumberTime in Patent Office376 DaysField of Search307/104, 320/108US Class Current1/1CPC Class CodesB60L 53/126 Methods for pairing a vehic...H01F 38/14 Inductive couplings for wir...H01Q 9/04 Resonant antennasH02J 50/12 of the resonant typeH02J 50/40 using two or more transmitt...H02M 1/0064 Magnetic structures combini...H02M 3/01 Resonant DC/DC convertersH04B 5/0037 for power transferH04B 5/79 for data transfer in combin...Y02T 10/70 Energy storage systems for ...Y02T 10/7072 Electromobility specific ch...Y02T 90/12 Electric charging stationsY02T 90/14 Plug-in electric vehicles
