4.6 Article

A Novel Modulation and Demodulation Method Based on Binary Frequency Shift Keying for Wireless Power and Data-Parallel Transmission

Journal

MICROMACHINES
Volume 13, Issue 9, Pages -

Publisher

MDPI
DOI: 10.3390/mi13091381

Keywords

frequency shift keying; wireless power transfer; data

Funding

  1. National Key Research and Development Program of China [2020YFB0407800]

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A novel parallel transmission method for wireless power and data based on FSK modulation and PLL demodulation is proposed in this paper. Experimental results showed that the data transmission is capable of achieving stable transmission within the range of output power variation.
It is usually necessary but difficult to achieve reliable communication between the primary side and pick-up side in the wireless power transfer (WPT) system due to magnetic interferences. In this paper, a novel parallel transmission method for wireless power and data is proposed, which is based on the frequency shift keying (FSK) modulation and demodulation. The data are transmitted by changing the working frequency of the inverter and then demodulated based on the phase-locked loop (PLL) technology. In this way, the signal before the rectifier circuit for the data demodulation can overcome the influence of power transmission on the data transmission. Finally, a 426 W prototype has been built to verify the effectiveness of the proposed transmission method. The experimental results showed that when the output power changed from tens of watts to hundreds of watts, the data transmission was capable of achieving a stable transmission with a 10 kbps baud rate.

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