Efficiency monitor for inductive power transmission

摘要

An inductive power receiver configured for receiving power transferred from an inductive power outlet having a primary coil includes a secondary coil configured to form an inductive couple with the primary coil thereby facilitating the power transfer. The inductive power receiver further includes a transmission circuit having a variable amplifier configured to vary the voltage of the power drawn by the secondary coil, and a modulator configured to control the variable amplifier. The inductive power receiver is configured to modulate a signal by the varying of the voltage. An inductive power outlet configured for transferring power to the inductive power receiver includes a primary coil and a receiving circuit configured to detect changes in voltage of the power transferred and to produce an output signal based on the changes.

主权项

1. A method for use by an inductive power receiver for regulating power transferred from an inductive power outlet by providing a feedback signal to said inductive power outlet while receiving power therefrom, the method comprising:
providing an inductive power receiver configured for the receiving of power, said inductive power receiver comprising: a coil configured to draw power from said inductive power outlet; a principal electrical load configured to receive power drawn by said coil; and an ancillary electrical load configured to be selectively connected to said coil to receive power drawn thereby; and said inductive power receiver transmitting a modulated signal to said inductive power outlet while receiving power therefrom by intermittently connecting said ancillary load to said coil at a rate determined by modulating a bit-rate signal according to at least one control signal from the principal electric load.