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Position Estimation of Multiple Receiving Coils and Power Transmission Control for WPT without Feedback
oleh: Jun Heo, Sang-Won Kim, In-Kui Cho, Yong Bae Park
Format: | Article |
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Diterbitkan: | MDPI AG 2022-11-01 |
Deskripsi
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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>4</mn><mo>×</mo><mn>2</mn></mrow></semantics></math></inline-formula> 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>1</mn><mi>W</mi></mrow></semantics></math></inline-formula> to Rx 1 and Rx 2, and the efficiency for Rx 1 is about <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>32.93</mn><mo>%</mo></mrow></semantics></math></inline-formula>, Rx 2 is <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>25.03</mn><mo>%</mo></mrow></semantics></math></inline-formula>, and the overall efficiency is confirmed to be <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>57.96</mn><mo>%</mo></mrow></semantics></math></inline-formula>.