Authors : Abdulkareem Mokif Obais, Mahmoud Shaker Nasr and Harith Nawfel Abdali
Abstract: The transfer of power from one point to another without using any wire is one of the most efficient modern technologies. It satisfies the urgent need for the emergence operation of small mobile devices such as laptop, mobile, inaccessible sensors and others. Because of the short and limited lifetimes of batteries, the difficulty of their replacement and their inaccessible locations, charging them wirelessly reveals as an urgent need in this era. Wireless Power Transfer or transmission (WPT) now a days represents an effective technology to offer satisfactory solutions to the problems mentioned above. In this research, a proposed WPT system designed and tested on PSpice, Orcad 16.6 is introduced in addition to a review of previous works covering different technologies of WPT systems. The operating frequency of the proposed WPT system is 63.5 kHz and the DC supply Voltage is 12 V. The proposed system is driven by a class-E power amplifier having a planar spiral coil as transmitting antenna. The proposed WPT system comprises one planar spiral transmitting coil 150 cm apart from three parallel connected planar spiral receiving coils. The power harvesting capability of the receiving circuit of this system is 132 mW. It is verified that the power harvesting capability of any WPT increases with the decrease in the reactance of the receiving circuit, thus, parallel connection of power harvesting coils is recommended.
Abdulkareem Mokif Obais, Mahmoud Shaker Nasr and Harith Nawfel Abdali, 2019. Design of a WPT System Equipped with Three Receiving Coils for Power Harvesting Purposes. Journal of Engineering and Applied Sciences, 14: 4747-4753.