Design and evaluation of low power wireless charger concept

摘要

This article deals with the concept proposal of the wireless charger for low power application areas. As wireless charging undertakes popularity, initially the state of the art within application area is realized, while main focus is given on the personal e-mobility mean of transport. The most suitable configuration of power electronic system is initially discussed, whereby several power converter stages are equipped within physical prototype as well. The biggest attention is given on the construction of the coupling elements, while design procedure is supported by the finite element analysis. The modelling of coupling coils element enables to improve physical model by the shielding system due to achievement of the required operational characteristics defined by bio-combability standards. The experimental part of the paper is discussing investigation of the operational characteristics of the whole wireless charging system. Here the efficiency characteristics in dependency on output power and transmitting distance is evaluated. Received results confirm suitability of the presented design approach and practical use of proposed wireless charger for e-scooter or e-bikes applications.