SYSTEM FOR CAPACITIVELY DRIVING A LOAD

摘要

A capacitive driving system (100) comprises: —a supply device (10) comprising a power generator (13), capacitive transmission electrodes (11, 12) and preferably at least one inductor (16) connected in series between the power generator and at least one of said transmission electrodes; —at least one load device (20) comprising two capacitive receiver electrodes (21, 22) and at least one load member (23) coupled to said receiver electrodes. For resonant energy transfer, the supply device and the load device have an energy transfer position in which a first one of said transmission electrodes together with a first one of said receiver electrodes defines a first transfer capacitor (31) while simultaneously a second one of said transmission electrodes together with a second one of said receiver electrodes defines a second transfer capacitor (32). At least one auxiliary capacitance (111; 112; 121; 122) is connected in series with inductor and load.

主权项

1. Capacitive driving system, comprising:
a supply device, the supply device comprising a power generator having two output terminals, at least one set of capacitive transmission electrodes coupled to respective ones of the output terminals; at least one load device, the load device comprising two capacitive receiver electrodes and at least one load member coupled to said receiver electrodes; wherein at least one of the supply device and the load device comprise at least one inductor connected in series with at least one of said respective electrodes; wherein the supply device and the load device have an energy transfer position in which a first one of said transmission electrodes together with a first one of said receiver electrodes defines a first transfer capacitor while simultaneously a second one of said transmission electrodes together with a second one of said receiver electrodes defines a second transfer capacitor; wherein, in the energy transfer position, resonant energy transfer takes place from the supply device to the load member; wherein, in the resonant circuit containing the at least one inductor and the load member in the energy transfer position, at least one auxiliary capacitance is connected in series with the inductor and the load member; wherein the capacitance value of each one of said transfer capacitors is in a range from(1−Δ1)·C1 to (1+Δ1)·C1, in which C1 is indicated as design capacitance of the transfer capacitors and in which Δ1 is indicated as variation of the transfer capacitors; wherein the capacitance value of the auxiliary capacitance is in a range from (1−Δa)·Ca to (1+Δa)Ca, in which Ca is indicated as design capacitance of the auxiliary capacitance and in which Δa is indicated as variation of the auxiliary capacitance; and wherein Ca