Vol. 94
Latest Volume
All Volumes
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
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.

1. Tec, K. M., I. Takehir, O. Sehoo, and H. Yoich, "Automated impedance matching system for robust wireless power transfer via magnetic resonance coupling," IEEE Tran. Ind. Electro., Vol. 6, No. 9, 3689-3698, Sep. 2013.

2. Che, L. H., S. Liu, Y. C. Zho, and T. J. Cui, "An optimizable circuit structure for high-efficiency wireless power transfer," IEEE Trans. Ind. Electro., Vol. 6, No. 1, 339-349, Jan. 2013.

3. Zhang, Y., Z. Zhao, and K. Chen, "Frequency decrease analysis of resonant wireless power transfer," IEEE Transaction on Power Electronics, Vol. 29, No. 3, 1058-1063, Mar. 2014.

4. Imura, T. and Y. Hori, "Maximizing air gap and efficiency of magnetic resonant coupling for wireless power transfer using equivalent circuit and Neumann formula," IEEE Trans. Ind. Electron., Vol. 58, No. 10, 4746-4752, Oct. 2011.

5. How, J., Q. Chen, S.-C. Wong, C. K. Tse, and X. Ruan, "Analysis and control of series/series-parallel compensated resonant converters for contactless power transfe," IEEE J. Emerg. Sel. Topics Power Electron., Vol. 3, No. 1, 124-136, Mar. 2015.

6. Zhang, W. and C. C. Mi, "Compensation topologies of high-power wireless power transfer systems," IEEE Transactions on Vehicular Technology, Vol. 65, No. 6, 4768-4778, Jun. 2016.

7. Wei, X., Z. Wang, and H. Dai, "A critical review of wireless power transfer via strongly coupled magnetic resonances," Energies, 4316-4341, 2014.

8. Kim, D. and Y. Park, "Calculation of the inductance and AC resistance of planar rectangular coils," Electronics Letters, Vol. 52, No. 15, 1321-1323, Jul. 2016.

9. Thompson, M., "Inductance calculation techniques --- Part II: Approximations and handbook methods," Power Control and Intelligent Motion, Dec. 1999.

10. Wang, Q., W. Che, M. Dionigi, F. Mastri, M. Mongiardo, and G. Monti, "Gains maximization via impedance matching networks for wireless power transfer," Progress In Electromagnetics Research, Vol. 164, 135-153, 2019.