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Energies 2018, 11(8), 2161; https://doi.org/10.3390/en11082161

A Power and Data Decoupled Transmission Method for Wireless Power Transfer Systems via a Shared Inductive Link

1
School of Automation, Chongqing University, Chongqing 400044, China
2
Chongqing Science and Technology Research Institute, Chongqing 401123, China
3
State key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
*
Author to whom correspondence should be addressed.
Received: 17 July 2018 / Revised: 11 August 2018 / Accepted: 11 August 2018 / Published: 18 August 2018
(This article belongs to the Special Issue Wireless Power Transfer 2018)
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Abstract

Wireless Power Transfer (WPT) technology is gaining global popularity. However, in some applications, data transmission is also required to monitor the load states. This paper presents an alternative wireless power and data transmission method via the shared inductive link. With the method, the system presents three characteristics: (1) controllability and stability of the output voltage; (2) miniaturization in volume of the system; (3) decoupled transmission of power and data. The output voltage control is realized by a non-inductive hysteresis control method. In particular, data is transferred when the power transmission is blocked (i.e., the hysteresis switch is off). The interference between power and data transmission is very small. The signal to noise ratio (SNR) performance which is relevant to the interference from power transfer to data transfer and data transfer capacity, is studied and optimized. Both simulation and experimental results have verified the proposed method. View Full-Text
Keywords: wireless power transfer; data transmission; hysteresis control; signal to noise ratio (SNR) wireless power transfer; data transmission; hysteresis control; signal to noise ratio (SNR)
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Li, X.; Wang, H.; Dai, X. A Power and Data Decoupled Transmission Method for Wireless Power Transfer Systems via a Shared Inductive Link. Energies 2018, 11, 2161.

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