Wireless Power Transfer Using Magnatic Core with Air Gaps

The wild spread of electric vehicles and the rapid growth of their manufacturing requires an easy, convenient and efficient charging system in public places. Wireless charging is one of the strongest candidates for this requirement. It is very safe and offers good business and commercial opportunities and its convenience promotes greener cities. To this end, this paper proposes a wireless power transfer scheme that utilizes the use of air-gapped transformers as the mean of the power transfer from the power source to the vehicle battery. A transformer with a magnetic core that has two air gaps is proposed. The core guides the magnetic flux to the secondary coil while the two air gaps will provide the physical separation between the transmitting and receiving coil. The paper studied the effect of introducing air-gaps in the transformer and the efficiency of the wireless power transfer through a series of experiments which showed promising results and a high potential for continuous development and improvement.