Wireless battery chargers for portable applications: design and test of a high‐efficiency power receiver

Abstract

In this study, the authors present a 5 W wireless battery charger for handheld devices. Efficiency-related issues are addressed. A power receiver architecture which improves power conversion efficiency is proposed. Design hints are provided for further applications. Comparison with a conventional architecture is provided as well. Laboratory prototypes of both the proposed and the conventional architectures have been realised. Both prototypes are tested by using the same power transmitter to perform a valuable comparison. As shown by the experimental results, in the receiver side power conversion efficiency is increased up to 99% thanks to the proposed solution.

Development of Design Methodology for 60Hz Wireless Power Transmission System

“…In addition, the direction of research has progressed towards the design of devices such as inverters and control techniques (5)- (8) . Wireless charging of electric vehicles is a typical application of WPT (9) (10) . A large value for the product of the coupling coefficient (k) and the quality factor (Q) yields a high transmission efficiency.…”

A multi-input, single-inductor power system for multisource energy harvesting

“…Innovative harvester sources are actually investigated, as for example piezoelectric harvesting of rainfall [1]. The power conversion efficiency has consequently become the key performance indicator in a wide-variety of research areas and accurate power measurements are required [2][3][4]. Among renewable energy sources fuel cells and photovoltaic arrays are the most promising for a wide variety of applications, ranging from few mWatts of wireless sensor networks to kWatts for household appliances.…”

Uncertainty evaluation in the measurements for the electric power quality analysis

“…Because of the continuous proliferation of high power nonlinear loads and distributed generation systems [1][2][3][4][5][6][7], the characteristics of the supplied voltages and currents are more and more altered respect to the rated ones.…”