Position Estimation of Multiple Receiving Coils and Power Transmission Control for WPT without Feedback

Jun Heo, Sang-Won Kim, In-Kui Cho and Yong Bae Park ()
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Jun Heo: Department of AI Convergence Network, Ajou University, Suwon 16499, Republic of Korea
Sang-Won Kim: Electronics and Telecommunications Research Institute, Daejeon 34129, Republic of Korea
In-Kui Cho: Electronics and Telecommunications Research Institute, Daejeon 34129, Republic of Korea
Yong Bae Park: Department of AI Convergence Network, Ajou University, Suwon 16499, Republic of Korea

Energies, 2022, vol. 15, issue 22, 1-11

Abstract: It is important to determine the position of the receiver (Rx) coils in wireless power transfer (WPT) system, and to control the power transmitted to the Rx coil based on this result. In particular, in a situation where there is no feedback between the primary side and the secondary side, it is difficult to control the received power because the information is limited. In this paper, a method for determining the position of the Rx coils and controlling the received power using limited parameters in a feedback-free WPT system is proposed. The proposed method is verified by constructing a 4 × 2 WPT system, and it is validated that the simulation result and the experimental result are consistent well. Furthermore, arbitrary power can be transmitted to the Rx coil based on the result of the position of the Rx coil. The experiment is conducted by transmitting about 1 W to Rx 1 and Rx 2, and the efficiency for Rx 1 is about 32.93 % , Rx 2 is 25.03 % , and the overall efficiency is confirmed to be 57.96 % .

Keywords: position estimation; power control; wireless power transfer; magnetic resonance; no feedback (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: 2022
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