Implantable wireless power system
First Claim
1. An apparatus for use in wireless energy transfer to power a medical device, the apparatus comprising:
- a transmitting assembly configured to transmit electromagnetic energy, the transmitting assembly comprising,a transmitting resonant coil providing a first conductor; and
an excitation coil inductively coupled to said transmitting resonant coil;
a receiving assembly magnetic resonance coupled to the transmitting assembly, the receiving assembly comprising,a receiving resonant coil sized to be implantable in a human body and providing a second conductor; and
a power pick-up coil inductively coupled to said receiving resonant coil;
wherein a first capacitor is electrically connected to said first conductor and a second capacitor is electrically connected to said second conductor; and
wherein said first conductor and/or second conductor has a thickness T, smaller than a width W of said first conductor and/or second conductor, such that every point within said first conductor and/or second conductor resides within a skin depth at a resonant frequency of said transmitting resonant coil and/or receiving resonant coil, wherein the skin depth is defined by
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Accused Products
Abstract
A wireless power system capable of transmitting power through the skin without percutaneous wires over distances ranging from a few inches to several feet includes an external transmitting coil assembly and a receiving coil assembly. The transmitting coil assembly includes an excitation coil and transmitting resonant coil which are inductively coupled to each other. The receiving coil assembly includes a receiving resonant coil and a power pick-up coil which are also inductively coupled to each other. A high frequency AC power input, such as radio frequency (RF), supplied to the excitation coil inductively causes the transmitting resonant coil to resonate resulting in a local time varying magnetic field. The transmitting and receiving resonant coils are constructed as to have closely matched or identical resonant frequencies so that the magnetic field produced by the transmitting resonant coil is able to cause the receiving resonant coil to resonate strongly also, even when the distance between the two resonant coils greatly exceeds the largest dimension of either coil. The receiving resonant coil then creates its own local time varying magnetic field which inductively produces a voltage in a power pick-up coil to provide power to an active implantable medical device or implantable rechargeable battery.
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Citations
56 Claims
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1. An apparatus for use in wireless energy transfer to power a medical device, the apparatus comprising:
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a transmitting assembly configured to transmit electromagnetic energy, the transmitting assembly comprising, a transmitting resonant coil providing a first conductor; and an excitation coil inductively coupled to said transmitting resonant coil; a receiving assembly magnetic resonance coupled to the transmitting assembly, the receiving assembly comprising, a receiving resonant coil sized to be implantable in a human body and providing a second conductor; and a power pick-up coil inductively coupled to said receiving resonant coil; wherein a first capacitor is electrically connected to said first conductor and a second capacitor is electrically connected to said second conductor; and wherein said first conductor and/or second conductor has a thickness T, smaller than a width W of said first conductor and/or second conductor, such that every point within said first conductor and/or second conductor resides within a skin depth at a resonant frequency of said transmitting resonant coil and/or receiving resonant coil, wherein the skin depth is defined by - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An apparatus for use in wireless energy transfer to power a medical device, the apparatus comprising:
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a transmitting assembly configured to transmit electromagnetic energy, the transmitting assembly comprising, a transmitting resonant coil providing a first conductor and a first electrical insulating medium between coil turns of said first conductor; and an excitation coil inductively coupled to said transmitting resonant coil; and a receiving assembly magnetic resonance coupled to the transmitting assembly, the receiving assembly comprising, a receiving resonant coil providing a second conductor and a second electrical insulating medium between coil turns of said second conductor; and a power pick-up coil inductively coupled to said receiving resonant coil; wherein a first capacitor is electrically connected to said first conductor and a second capacitor is electrically connected to said second conductor; wherein said first and/or second insulating medium comprises one or more dielectric materials that is solid with a polygonal cross section, said first and/or second insulating medium providing a dielectric dissipation factor of 0.01 or less; wherein said first and/or second conductor has a thickness T of less than 0.02 inches and a width W of 0.5 inch or less; and wherein said transmitting and/or receiving resonant coil has a diameter of 3 inches or less. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. An apparatus for use in wireless energy transfer to power a medical device, the apparatus comprising:
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a transmitting assembly configured to transmit electromagnetic energy, the transmitting assembly comprising, a transmitting resonant coil providing a first conductor and a first electrical insulating medium between coil turns of said first conductor; and an excitation coil inductively coupled to said transmitting resonant coil; and a receiving assembly magnetic resonance coupled to the transmitting assembly, the receiving assembly comprising, a receiving resonant coil providing a second conductor and a second electrical insulating medium between coil turns of said second conductor; a power pick-up coil inductively coupled to said receiving resonant coil; a rectification circuit connected to said power pick-up coil; DC filter components connected to said rectification circuit; and a biocompatible housing which houses and hermetically seals the receiving resonant coil, the power pick-up coil, the rectification circuit, and the DC filter components from body fluids and tissues; wherein a first capacitor is electrically connected to said first conductor and a second capacitor is electrically connected to said second conductor; wherein said first and/or second insulating medium comprises one or more solid dielectric materials providing a dielectric dissipation factor of 0.01 or less; wherein said first and/or second conductor has a thickness T of less than 0.02 inches and a width W of 0.5 inch or less; wherein the thickness T is smaller than the width W; and wherein said transmitting and/or receiving resonant coil has a diameter of 3 inches or less. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. An apparatus for use in wireless energy transfer to power a medical device, the apparatus comprising:
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a transmitting assembly configured to transmit electromagnetic energy, the transmitting assembly comprising, a transmitting resonant coil providing a first conductor; and an excitation coil inductively coupled to said transmitting resonant coil; a receiving assembly sized to be implantable inside a human body, wherein the receiving assembly comprises a power pick-up coil hermetically sealed in a biocompatible housing; and a receiving resonant coil magnetic resonance coupled to the transmitting assembly, wherein said receiving resonant coil comprises a second conductor that is inductively coupled to said power pick-up coil; wherein a first capacitor is electrically connected to said first conductor and a second capacitor is electrically connected to said second conductor; and wherein said first conductor and/or second conductor has a thickness T, smaller than a width W of said first conductor and/or second conductor, such that every point within said first conductor and/or second conductor resides within a skin depth at a resonant frequency of said transmitting resonant coil and/or receiving resonant coil, wherein the skin depth is defined by - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56)
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Specification