Abstract-A system for wireless power transfer of microsystems in-vivo implantable in small animals is presented. The described solution uses a servo-controlled transmitter moved under the animal moving space. The solution minimizes the power irradiation while enabling animal speeds up to 30 cm/s. An x-y movable magnetic coil transmits the required power with a level able to keep constant the received energy. A permanent magnet on board of the implantable micro-system and an array of magnetic sensors form a coil tracking system capable of an alignment accuracy as good as 1 cm. The power is transferred over the optimized remote powering link at 13.56 MHz. The received ac signal is converted to dc voltage with a passive fullwave integrated rectifier and the voltage regulator supplies 1.8 V for the implantable sensor system. Experimental measurement on a complete prototype verifies the system performance.Index Terms-Remote powering, wireless power transfer, implantable electronics, multi-sensor system, monitoring system, implantable micro-system, servo-controlled power transfer, x-y rails, biomedical implant, system for freely moving animal, remotely powered sensor systems, in-vivo implantable system.
Review of the Subject.-This paper represents a brief graphical-The modifications upon the torque speed curves of these harmonies anralytical exposition, followed by a mathematical development of have been discussed. A simple Fourier analysis underlies the the harmonics due to slot openings These were proved to be whole phenomena. even and odd multiples of the number of slots plus and minus one.
Review of the Subject.-This paper represents a brief graphicalanalytical exposition, followed by a mathematical development of the harmonics due to slot openings not included in this abridgement. These were proved to be even and odd multiples of the number of slots plus and minus one.The modifications upon ,the torque speed curves of these harmonics have been discussed. A simple Fourier analysis underlies the whole phenomena.
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