Patent ID: 8872386
Filing Date: 2014-10-28
Classification: H02H,H02J,H04B

Abstract:
1. A control circuit for an inductive power receiver, comprising: a resonant circuit connected to a secondary coil configured to inductively couple with a primary coil of an inductive power outlet, said resonant circuit having a characteristic resonant peak at a frequency lower than an operational frequency of the inductive power outlet such that operating at a higher frequency reduces the amount of power transferred; a rectifier; a rectified current sense; a communication and control unit operable to communicate power control instructions to the inductive power outlet comprising: at least one communications modulator operable to create at least a first state and a second state such that transitioning from said first state to said second state produces a detectable change at the primary coil of the inductive power outlet; and at least one signal generator operable to generate communication signals comprising a series of pulses generated at a characteristic frequency f.