Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Electrical Power and Machines

The excessive growth in the capabilities of portable devices leads to more energy consumption, while dealing with the traditional charging system often represents a danger to the user.The incorporation of renewable energy, especially photovoltaic modules, into wireless charging has been utilized to resolve these problems providing convenient and eco-friendly methods of transferring power for recharging portable devices. In this thesis, integrating the usage of the photovoltaic energy and the inductive power transfer charging system is applied to charge portable devices. A new variable frequency control technique for inductive power transfer is proposed to overcome the switching frequency limitation and increase transfer efficiency without increasing the switching frequency. Also, a design methodology for the AC inductor design is introduced. At first, the effect of frequency and system specifications on inductor design is studied using MATLAB. Then, the designed inductor is simulated at different distances using ANSYS Maxwell, as 3-D finite analysis program, for determining the maximum transfer distance for that design. Secondly, a high-frequency resonant inverter based on energy injection and free oscillation control techniques is investigated for inductive power transfer.Thirdly, the impacts of wired and wireless charging on the battery state of charge and efficiency under constant current charging constant voltage (CCCV) charging are examined and compared. Finally, a hardware setup is done for implementing inductive power transfer

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