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

Xiaofei Li, Haichao Wang and Xin Dai
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Xiaofei Li: School of Automation, Chongqing University, Chongqing 400044, China
Haichao Wang: Chongqing Science and Technology Research Institute, Chongqing 401123, China
Xin Dai: School of Automation, Chongqing University, Chongqing 400044, China

Energies, 2018, vol. 11, issue 8, 1-14

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.

Keywords: wireless power transfer; data transmission; hysteresis control; signal to noise ratio (SNR) (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 (1)

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