Conductive layer of a large surface for distribution of power using capacitive power transfer

A method for reducing idle currents in a transmitter for supplying a power to a load connected in a capacitive power transfer system configured to distribute power over large surface, comprising:

• operating a power generator at a first frequency having a first terminal and a second terminal;
• connecting a first electrode, of a transmitter portion of the capacitive power transfer system to the first terminal of the power generator;
• connecting a second electrode of the transmitter portion of the capacitive power transfer system to the second terminal of the power generator;
• and
• connecting an inductor in parallel between the first electrode and the second electrode, the inductor having an inductance to create a resonant circuit with a parasitic capacitor formed between the first electrode and the second electrode, such that the resonant circuit resonates at the first frequency.

A circuit for reducing common mode (CM) currents in a capacitive power transfer system configured to wirelessly distribute power over a large surface, comprising:

• a first terminal connected to a first transmitter electrode of the capacitive power transfer system, wherein the first transmitter electrode forms a first parasitic capacitor to a protected earth connected to an earth ground;
• and
• a second terminal connected to a second transmitter electrode of the capacitive power transfer system, wherein the second transmitter electrode forms a second parasitic capacitor to the protected earth;
• wherein the circuit generates a first periodic voltage signal between the first terminal and the earth ground, the circuit further generates a second periodic voltage signal between the second terminal and the earth ground, wherein at least an amplitude of each of the first periodic voltage signal and the second periodic voltage signal is controlled to essentially offset the common mode (CM) current flowing through the first parasitic capacitor and the second parasitic capacitor.