Device for transferring electromagnetic energy between primary and secondary coils
First Claim
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1. A signal transmission system for transmitting electromagnetic energy, the signal transmission system comprising:
- a primary coil of wire comprising a plurality of np turns of wire, the primary coil wire having a width and a center, the primary coil having an axis of rotation and where for i=1, 2, . . . , np -1 the end of the ith turn coincides with the beginning of the (i+1)th turn and for i=1, 2, . . . , np the primary coil wire at the beginning of the ith turn has a width 2Rp,i and a center at a perpendicular distance rp,i from the axis of rotation so that rp,i ≧
Rp,i +Rp,i+m+1 +rp,i+m+1 for at least one i and m; and
a secondary coil of wire wherein the secondary coil is implanted in a human and couples electromagnetic energy from the primary coil to a cochlear stimulator implanted in the human, the secondary coil comprising a plurality of ns turns of wire, the secondary coil wire having a width and a center, the secondary coil having an axis of rotation and where for i=1, 2, . . . , ns -1 the end of the ith turn coincides with the beginning of the (i+1)th turn and for i=1, 2, . . . , ns the secondary coil wire at the beginning of the ith turn has a width 2Rs,i and a center at a perpendicular distance rs,i from the axis of rotation so that rs,i ≧
Rs,i +Rs,i+m+1 +rs,i+m+1 for at least one i and m.
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Abstract
A cochlear implant system including primary and secondary coils of wire for transmitting electromagnetic energy between the primary and secondary coils, wherein at least one of the primary and secondary coils are wound with turns of wire that are distributed radially and not concentrated at a single circumference so as to enhance the magnetic coupling coefficient of the primary and secondary coil systems.
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Citations
10 Claims
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1. A signal transmission system for transmitting electromagnetic energy, the signal transmission system comprising:
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a primary coil of wire comprising a plurality of np turns of wire, the primary coil wire having a width and a center, the primary coil having an axis of rotation and where for i=1, 2, . . . , np -1 the end of the ith turn coincides with the beginning of the (i+1)th turn and for i=1, 2, . . . , np the primary coil wire at the beginning of the ith turn has a width 2Rp,i and a center at a perpendicular distance rp,i from the axis of rotation so that rp,i ≧
Rp,i +Rp,i+m+1 +rp,i+m+1 for at least one i and m; anda secondary coil of wire wherein the secondary coil is implanted in a human and couples electromagnetic energy from the primary coil to a cochlear stimulator implanted in the human, the secondary coil comprising a plurality of ns turns of wire, the secondary coil wire having a width and a center, the secondary coil having an axis of rotation and where for i=1, 2, . . . , ns -1 the end of the ith turn coincides with the beginning of the (i+1)th turn and for i=1, 2, . . . , ns the secondary coil wire at the beginning of the ith turn has a width 2Rs,i and a center at a perpendicular distance rs,i from the axis of rotation so that rs,i ≧
Rs,i +Rs,i+m+1 +rs,i+m+1 for at least one i and m. - View Dependent Claims (2, 3, 4)
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5. A cochlear implant system comprising:
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a primary coil of wire placed outside the body of a user; and a secondary coil of wire implanted within the body of a user for receiving electromagnetic energy from the primary coil; wherein at least one of the primary and secondary coils comprises a plurality of n turns of wire arranged in j layers radially and k layers axially, such that n equals the product of j and k, and wherein j is substantially greater than k. - View Dependent Claims (6, 7, 8)
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9. A cochlear implant system comprising:
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a primary coil of wire placed outside the body of a user; and a secondary coil of wire implanted within the body of a user for receiving electromagnetic energy from the primary coil; wherein each of the coils has a radius and an axial length perpendicular to the coil radius, and wherein at least one of the primary and secondary coils has a radius that is substantially greater than its axial length. - View Dependent Claims (10)
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Specification