Patent ID: 9065489
Filing Date: 2015-06-23
Classification: H02H,H02J,H04B

Abstract:
1. A control circuit for an inductive power outlet configured to transfer power to an inductive power receiver, said control circuit comprising: a resonant circuit connected to a primary coil configured to inductively couple with a secondary coil of said inductive power receiver, said resonant circuit having a characteristic resonant peak; a frequency driver operable to provide a driving voltage across said primary coil, said driving voltage oscillating at an operating frequency higher than said characteristic resonant peak of the resonant circuit; a magnitude detector operable to monitor primary coil voltage; a data demodulator operable to detect modulated peaks in primary coil voltage indicating that a communications modulator of said inductive power receiver has transitioned from a first state to a second state, to determine a characteristic frequency of said peaks and thereby to extract modulated data sent in communication signals from said inductive power receiver.