Extended Results for a Developed 10 kW LC-Compensated Hybrid Wireless Power Transfer System

Abstract

Wireless power transfer (WPT) is a technique that permits the power to transfer wirelessly through time-changing magnetic or electric fields that represent a transfer media. WPT could be assorted into two main categories; capacitive power transfer (CPT) and inductive power transfer (IPT). Combining the inductive and the capacitive topologies has been resulted in a third topology known as hybrid wireless power transfer (HWPT). HWPT possesses the ability to transfer high amounts of power over large vertical gaps and over different horizontal misalignments with high efficiency. This paper extends the results of a 10 $\mathbf{kW}$ HWPT system, newly developed by the same authors. The magnetic and the electric fields' distributions are both presented and studied. These results represent a key parameter in determining the safety exposure limit of both fields on the nearby humans. The obtained fields' values play an important role in selecting the proper shields to avoid fields' leakage to the surroundings. The $3\mathrm{D}$ structure of the proposed model and the resultant fields are also simulated using Maxwell-3D simulation tool. The results of the proposed model prove an enhancement in the field distribution among the transmitter and the receiver with a minimum leakage to the surrounding as a result of using two different types of shields. Moreover, the system preserves its coupling fields for misalignment distances exceeding 500 mm in all directions. The developed HPWT system proves better performance under different misalignment conditions than the published IPT and the CPT systems separately