INDUCTIVELY RECHARGEABLE EXTERNAL ENERGY SOURCE, CHARGER AND SYSTEM FOR A TRANSCUTANEOUS INDUCTIVE CHARGER FOR AN IMPLANTABLE MEDICAL DEVICE
First Claim
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1. A system, comprising:
- an implantable medical device for providing a therapy to a patient, the implantable medical device having a secondary coil and a rechargeable power source;
an external charging system, comprising;
a primary coil;
a variable power source adapted to generate a signal in the primary coil that is of a selectable frequency; and
a moveable core positionable relative to the primary coil adapted to focus magnetic flux generated by the signal in the primary coil.
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Abstract
A mechanism for transferring energy from an external power source to an implantable medical device is disclosed. An antenna is positioned in proximity of the implantable medical device. The position of a core of the antenna is adjusted relative to the implantable medical device while the antenna is maintained substantially stationary. A frequency of transmission of a power source is adjusted, and the antenna is driven at the adjusted frequency to transfer energy transcutaneously to the implantable medical device. In one embodiment, the frequency of transmission is selected based on an amplitude of a signal in the antenna.
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Citations
15 Claims
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1. A system, comprising:
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an implantable medical device for providing a therapy to a patient, the implantable medical device having a secondary coil and a rechargeable power source; an external charging system, comprising; a primary coil; a variable power source adapted to generate a signal in the primary coil that is of a selectable frequency; and a moveable core positionable relative to the primary coil adapted to focus magnetic flux generated by the signal in the primary coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification