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.
Highlights
With the demand of transferring power without physical contact, wireless power transfer (WPT)technology is gaining global popularity [1,2,3,4,5] especially for applications in harsh environments [1,2,6,7,8].In most cases, a WPT system is designed to provide a load with constant voltage
Principlesuch as implanted biomedical devices or robot charging, the applications such voltage as implanted biomedical devices or robot charging, information such as battery status, output and output current should be transmitted from the information such as battery status,such output voltage and output current shouldor be robot transmitted from the applications as implanted biomedical devices charging, the information such as battery status, output voltage and output current should be transmitted secondary side to the primary side
We have learnt that the reduction of power transfer interference on data transfer can be achieved by reasonably setting some parameters
Summary
With the demand of transferring power without physical contact, wireless power transfer (WPT). In references [13,15,16], the volume of the coupling structure is relatively relatively small, since power and data are transferred through the same coupling coils. Reference [14] studied an inductive andiscapacitive combined capacitive combined parallel transmission of power and data, where data transferred via the parallel data, where have data the is transferred via the parasitic capacitances, parasitictransmission capacitances,of butpower not alland the applications required aluminum plates. AC bi-directional switchanisAC added to control the dataistransmission flow speed transmission rates To this method, bi-directional switch added to control anddata a hysteresis controller utilized to realize the output voltage. Bi-directional switch added to control anddata a hysteresis controller utilized to realize the output voltage These features are verified the transmission flow is and a hysteresis controller is utilized tocontrol.
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