INDUCTIVE LINK COIL DE-TUNING COMPENSATION AND CONTROL

摘要

An inductive wireless power transfer and communication system includes an electrostatic shield for one of the coils. The electrostatic shield is inductively coupled with the coil and is configured as an open circuit. A signal processing element or elements, especially a modulator or a demodulator, are connected across the electrical discontinuity in the electrostatic shield. Because the electrostatic shield is inductively coupled to the coil, the modulator or demodulator can operate on the signal on the coil. A variable impedance element is connected across the electrical discontinuity in the electrostatic shield. Because the electrostatic shield is inductively coupled to the coil, the variable impedance element can tune the impedance of the system.

主权项

1. A wireless coupling system comprising:
a first coil, wherein an alternating current is present on the first coil; a second coil, the second coil being inductively coupled to the first coil; an electrostatic shield for the first coil, wherein the electrostatic shield is inductively coupled to the first coil, the electrostatic shield having a gap extending the axial length of the electrostatic shield; and a variable impedance element coupled across the gap of the electrostatic shield.