Power Transfer Efficiency Analysis for Omnidirectional Wireless Power Transfer System Using Three-Phase-Shifted Drive

Zhaohong Ye, Yue Sun, Xiufang Liu, Peiyue Wang, Chunsen Tang and Hailin Tian
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Zhaohong Ye: College of Automation, Chongqing University, Chongqing 400044, China
Yue Sun: College of Automation, Chongqing University, Chongqing 400044, China
Xiufang Liu: Shanghai Aerospace Equipment Manufacturer Co., Ltd., Shanghai 200245, China
Peiyue Wang: College of Automation, Chongqing University, Chongqing 400044, China
Chunsen Tang: College of Automation, Chongqing University, Chongqing 400044, China
Hailin Tian: Shanghai Aerospace Equipment Manufacturer Co., Ltd., Shanghai 200245, China

Energies, 2018, vol. 11, issue 8, 1-19

Abstract: In order to implement the omnidirectional wireless power transfer (WPT), a novel three-phase-shifted drive omnidirectional WPT system is proposed. This system is comprised of three independent phase-adjusted excitation sources, three orthogonal transmitting coils, and one planar receiving coil. Based on the mutual coupling theory, the power transfer efficiency is derived and the corresponding control mechanism for maximizing this efficiency is presented. This control mechanism only depends on the currents’ root-mean-square (RMS) values of the three transmitting coils and simple calculations after each location and/or posture change of the receiving coil, which provides the real-time possibility to design an omnidirectional WPT system comparing with the other omnidirectional systems. In aid of computer emulation technique, the efficiency characteristic versus the omnidirectional location and posture of the receiving coil is analyzed, and the analytical results verify the validity of the control mechanism. Lastly, a hardware prototype has been set up, and its omnidirectional power transmission capacity has been successfully verified. The experimental results show that the wireless power is omnidirectional and it can be effectively transmitted to a load even though its receiving coil moves and/or rotates in a 3-D energy region.

Keywords: wireless power transfer (WPT); power transfer efficiency; omnidirectional wireless power; three-phase-shifted drive; mutual inductance coupling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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