Wireless Power Transmission Based on Optimized Coupling Structure

Aiming at the problem that the coupling capacitance between the primary side and the secondary side of the traditional four-pole plate coupled capacitor mechanism is small, a large compensation inductance is needed. In order to reduce the compensation inductance, a capacitor is connected in parallel at the transmitting end and the receiving end, but it will consume power. In this paper, a new quadrupole plate coupling mechanism is adopted. On the basis of the original quadrupole plate, the two plates of the primary side and the secondary side are separated by the medium to form a new coupling mechanism. It can increase the coupling capacitance in the primary and secondary sides, so there is no need for parallel capacitance. Based on the proposed idea, the modeling and simulation are carried out, and the coupling capacitance of the plate in the primary side and the secondary side is indeed increased by two to three orders of magnitude. After that, an experimental platform was built for testing. The output power of the system was 1.54 W and the efficiency reached 48.1%. The research results of this paper reduce the power loss, and the coupling area is adjustable, which can adjust the resonant frequency without changing the compensation inductance.