Two‐port network approach for a wireless power transfer link using a cascade of inductively coupled resonators

Abstract

Summary A wireless power transmission link consisting of a transmitting and a receiving resonator wirelessly connected by means of N relay resonators is investigated, and a 2‐port network approach is proposed. The presented approach exploits the properties of periodic networks to derive useful closed‐form formulas that can be used to match the wireless energy link with respect to generic reference impedances.

Optimization of Multiresonant Wireless Power Transfer Network Based on Generalized Coupled Matrix

“…By using the coupled mode theory, the energy transfer efficiency of the system was greatly improved by adding a coil with the same resonant frequency between the transmitting coil and the receiving coil. Further study in [6][7][8][9][10] showed that the higher transmission efficiency and power level can be achieved at a larger distance by increasing the relay resonator.…”

“…The effect of the addition of 1 relay coil on the transmission efficiency of the MCRWPT system with four coils was studied in [7], and the coaxial relay coil placed on the system to enhance the transmission efficiency was greater, but the vertical display had wider practical application prospects. The [8] proposed MCRWPT array resonator based on resonator through the relay placed level could achieve times the diameter of the resonator of wireless power transmission (WPT) distance, when using the 10-array resonator, the efficiency of energy transmission was still close to 85%.…”