PCB Resonators Characterization for Shielding Purposes in DWPT Systems

In this work, the goal is to characterize PCB-based passive resonators, fabricated to work in a 4×4 array with the aim of mitigating the magnetic leakage in dynamic wireless electric vehicle (EV) charging systems. The array of resonators is configured in a 2D layout, and it consists of spirals having rectangular shape which will be activated through inductive coupling with the nearby dynamic wireless power transfer (DWPT) system. Current research for low-frequency magnetic shielding in this area is limited. The solution proposed in this research is lightweight, cost-efficient and adjustable with magnetic shielding purposes. Hence, since the system is narrowband, the tuning capacitance values play a crucial role in the DWPT system. Consequently, this work concerns measuring the performance of the single resonator's resonance frequency, which for magnetic shielding purposes needs to be as accurate as possible.