Patent ID: 9125242
Filing Date: 2015-09-01
Classification: A61B,A61F,A61M,A61N,H02J,H05B

Abstract:
1. An inductive power transfer system for supplying power to an electrical load located in it living body, the system including: a primary power supply located externally of the living body having a primary resonant circuit and being capable of providing an electromagnetic field; an inductive power pick-up implanted within the living body having a pick-up resonant circuit and being capable of receiving power from the electromagnetic field provided by the primary power supply to supply power to the electrical load; a plurality of reactive components, the reactive components being electrically connected to one or both of the primary resonant circuit and the pick-up resonant circuit; a processor unit to increase or decrease the power available to the load by switching one or more of the reactive components into or out of connection with the primary resonant circuit or the pick-up resonant circuit to thereby vary the resonant frequency of the primary resonant circuit or the pick-up resonant circuit, the processor unit being a microprocessor, analogue circuit, programmable logic device or combination of any of the foregoing; and wherein at least one of the reactive components is switched into or out of connection with the resonant circuit with which it is connected at a first rate and another reactive component is switched into or out of connection with the resonant circuit with which it is connected at a second rate that is slower than the first rate.