Patent ID: 8827889
Filing Date: 2014-09-09
Classification: A61M,H02J,H03H

Abstract:
1. A system for powering an implantable medical device, comprising: at least one external subsystem comprising a drive loop, an amplifier operably connected to selectively provide radio frequency energy to the drive loop, a transmitter resonator configured to be inductively coupled to the drive loop, and a sensor operable to monitor the drive loop; an implantable subsystem configured to be implanted in a patient and comprising an implantable medical device, a load loop operably connected to the medical device, and a receiver resonator configured to be inductively coupled to the load loop; wherein during operation the transmitter resonator and the receiver resonator comprise a magnetically coupled resonator (MCR) such that the medical device is energized from radio frequency energy from the amplifier that is inductively transmitted from the drive loop to the MCR and is inductively transmitted from the MCR to the load loop; and a controller operable to receive data from the sensor, and to use the received data to actively control the system to optimize energy transfer efficiency in the MCR.