Design of coaxial coupled structure for distance-insensitive wireless power transfer

Gao Han; Yanming Liu; Shizhong Guo; Tao Han; Qian Li

doi:10.1063/1.5095210

Design of coaxial coupled structure for distance-insensitive wireless power transfer

Rev Sci Instrum. 2019 Jul;90(7):074708. doi: 10.1063/1.5095210.

Authors

Gao Han¹, Yanming Liu¹, Shizhong Guo¹, Tao Han¹, Qian Li¹

Affiliation

¹ School of Aerospace Science and Technology, Xidian University, Xi'an 710071, China.

PMID: 31370484
DOI: 10.1063/1.5095210

Abstract

Coaxial coupled structure of wireless power transfer, applied to high-precision instruments in aerospace, can eliminate interference sources by spatial isolation. For the optimization of the electromagnetic structure, a C-shaped magnetic structure is presented for both shielding electromagnetic simulation and improving coupling. By comparing of spiral and coaxial structures, an analysis is presented and validated in the effect of positional offset on inductive coupling, voltage gain, and efficiency. To obtain a stable and sufficient power supply, the prototype is implemented based on primary series-secondary series compensation topology with a maximum output power of 200 W, and a DC-DC efficiency of 82% is achieved.