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Comparative Study of Circular Flat Spiral Coils Structure Effect on Magnetic Resonance Wireless Power Transfer Performance

By Naamane Mohdeb
Progress In Electromagnetics Research M, Vol. 94, 119-129, 2020


Wireless power transfer (WPT) via coupled magnetic resonance is anencouraging technology to be applied in many fields. In this paper, a method using a circular coil spiral inductor structure to wirelessly transfer energy is proposed. It represents the characteristic of six parallel air core inductor mutually coupled in the free space for wireless power transfer system. Based on the analytical model and circuit theory, the relationship between the coil design parameters and the system performance is deduced, and the effects of the outer radius, inner radius, channel width and coil turns are thoroughly studied to improve the system performance at different axial distances and in lateral misalignment. Also, an elimination method for transmission efficiency dead-zone (TEDZ) is proposed. The proposed method utilizes angular rotation of the receiver (Px) to eliminate the zero-coupling point which causes TEDZ and boosts the coupling coefficient such that the TEDZ is eliminated, and the high efficiency region is extended.


Naamane Mohdeb, "Comparative Study of Circular Flat Spiral Coils Structure Effect on Magnetic Resonance Wireless Power Transfer Performance," Progress In Electromagnetics Research M, Vol. 94, 119-129, 2020.


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