In this paper three different operative regimes for a resonant inductive Wireless Power Transfer link are discussed.The first operative regime provides a constant output voltage or current.The second analyzed operative regime adopts a frequency agile operative scheme and is well-suited for applications requiring a performance independent of the coupling coefficient.Finally,the third operating regime provides a load-independent output voltage or current.For all the analyzed cases the relevant equations are illustrated and discussed.Some experimental data are also reported for validation.