Transcutaneous energy transfer device
First Claim
Patent Images
1. A transcutaneous energy transfer device comprising:
- a) a plurality of first coils, each first coil for performing at least one of transmitting power and receiving power;
b) a first circuit, coupled to each coil from the plurality of first coils for performing one of providing power to each coil of the plurality of first coils, the power provided for transmission therefrom, and receiving power from each coil of the plurality of first coils;
c) a plurality of second coils, each second coil for performing one of transmitting power to and receiving power from a coil of the plurality of first coils;
d) a second circuit, coupled to each coil of the plurality of second coils for performing one of providing power to each coil of the plurality of second coils, the power provided for transmission therefrom, and receiving and combining power from each coil of the plurality of second coils; and
,e) a control system for maintaining provision of a sufficient amount of power to the second circuit, wherein a portion of the power is received at each of the plurality of second coils, the portions received at each of the second coils forming approximately the sufficient amount of power when combined, and wherein the power provided to some of the first coils for transmission is varied in order to transmit the sufficient amount of power to the plurality of second coils such that damage to a medium between the plurality of first coils and the plurality of second coils due to induced electromagnetic fields is controlled within predetermined limits.
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Abstract
In the design of transcutaneous energy transfer devices, variation in spacing between coils results in energy transfer efficiency changes. These changes may have significant effect on a system. It is proposed to provide a plurality of implanted coils for receiving energy simultaneously. Preferably, a plurality of coil pairs is used for transferring energy simultaneously. Also, a feedback system for use in a multiple coil system is disclosed.
145 Citations
23 Claims
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1. A transcutaneous energy transfer device comprising:
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a) a plurality of first coils, each first coil for performing at least one of transmitting power and receiving power; b) a first circuit, coupled to each coil from the plurality of first coils for performing one of providing power to each coil of the plurality of first coils, the power provided for transmission therefrom, and receiving power from each coil of the plurality of first coils; c) a plurality of second coils, each second coil for performing one of transmitting power to and receiving power from a coil of the plurality of first coils; d) a second circuit, coupled to each coil of the plurality of second coils for performing one of providing power to each coil of the plurality of second coils, the power provided for transmission therefrom, and receiving and combining power from each coil of the plurality of second coils; and
,e) a control system for maintaining provision of a sufficient amount of power to the second circuit, wherein a portion of the power is received at each of the plurality of second coils, the portions received at each of the second coils forming approximately the sufficient amount of power when combined, and wherein the power provided to some of the first coils for transmission is varied in order to transmit the sufficient amount of power to the plurality of second coils such that damage to a medium between the plurality of first coils and the plurality of second coils due to induced electromagnetic fields is controlled within predetermined limits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A transcutaneous energy transfer device for coupling with at least a first coil comprising:
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a) a plurality of second coils, wherein the plurality of second coils comprises a number of coils different from the number of the at least first coil, each second coil for performing at least one of transmitting power to and receiving power from the at least first coil; and
,b) a circuit, coupled to each coil from the plurality of second coils for performing one of providing power to each coil of the plurality of second coils, the power provided for transmission therefrom, and receiving and combining power from each coil of the plurality of second coils. - View Dependent Claims (11)
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12. A transcutaneous energy transfer device for providing electrical power to a medical device implanted beneath the skin of a patient comprising:
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a) a plurality of first coils for transmitting power in the form of electromagnetic radiation, wherein the plurality of first coils comprises three or more first coils; b) a plurality of second coils, each second coil for implantation beneath the skin of the patient beneath different segments of tissue at different locations, the plurality of second coils for receiving energy in the form of electromagnetic energy transmitted from the first coils outside the patient, wherein the plurality of second coils comprises three or more second coils; c) a first circuit for providing power to the first coils; d) a second circuit for implantation beneath the skin of the patient, the second circuit for combining the power received by the second coils and for providing power to an implanted device. - View Dependent Claims (13, 14)
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15. Transcutaneous energy transfer device comprising:
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a primary circuit comprising a plurality of primary coils coupled to at least a primary coil driver, a primary RF transceiver coupled to a plurality of the primary coils for transmitting and receiving RF signals, and primary signal filtering and extraction means for extracting information from the RF signal received by the primary RF transceiver; and a secondary circuit comprising a plurality of secondary coils, a secondary RF transceiver coupled to a plurality of the secondary coils, and secondary signal filtering and extraction means for extracting information from the RF signal received by the secondary RF transceiver. - View Dependent Claims (16)
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17. A method of providing power from an external circuit having a control system and a plurality of first coils to an implanted circuit having a plurality of implanted second coils comprising the steps of:
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determining an amount of power to be provided to the implanted circuit; using the control system for dividing the amount of power into a number of portions such that tissue damage to a patients skin due to induced electromagnetic fields is minimized and for determining sufficient power to be provided to each of a number of the first coils to result in reception of a portion of the power at each of a number of the implanted second coils, the portions received at each of the implanted second coils forming approximately the determined amount of power when combined; and
,supplying the sufficient power to each of a number of the first coils. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification