Composite source type power and signal parallel transmission method used in ecpt system

Abstract

The invention discloses a composite information source type electric energy and signal parallel transmission method for an ECPT system. According to the method, signals are transmitted in parallel by means of multiple frequencies in the ECPT system, a wider communication bandwidth is achieved, the problem that a channel frequency band in an existing electric energy and signal parallel transmission system is narrow is solved, and the data transmission rate is increased; in addition, a circuit topology which is built by means of the method achieves isolation between an electric energy channel and a channel by relying on the impedance characteristic of the circuit topology, and isolation of most of electric energy crosstalk is completed; a channel bandwidth is fully utilized, signal modulation is conducted in multiple sub-channels through a frequency-division multiplexing method, spectral analysis is conducted on pickup signals through rapid Fourier transform, spectrum separation of multiple high frequency carrier waves is conducted at the same time of separating the rest of low-frequency crosstalk, multiple signal demodulation under a specific crosstalk frequency spectrum is achieved, and higher capacity of resisting disturbance is achieved compared with an analog demodulation mode.

Description

technical field [0001] The present invention relates to the information transmission technology in the wireless power transfer system, in particular, it is a composite source type power and signal transmission method used in the ECPT (Electric-field Coupled Power Transfer, electric field coupled wireless power transfer) system . Background technique [0002] With the continuous development and breakthrough of Wireless Power Transfer (WPT) technology, research on Electric-Field Coupled Power Transfer (ECPT) technology based on Electric-Field Coupled Power Transfer (ECPT) has attracted the attention of researchers at home and abroad in recent years. Scholars from New Zealand, the United States, the United Kingdom, Japan, South Korea, China and other countries have carried out theoretical research and research on wireless charging / power supply based on ECPT technology for electric vehicles, biological prostheses, rotating mechanisms, mobile phones, and robots. App explore. Ho...

AI Technical Summary

Problems solved by technology

However, there are still some bottlenecks to be solved for the existing ECPT system

Among them, the common problems caused by the high operating frequency of the system and the high order of the model include: complex control system, high parameter sensitivity, unsatisfactory robustness, limited power level and efficiency, etc.

However, from the actual effect point of view, because the amplitude of the electric energy carrier is much higher than that of the signal carrier, the analog filtering is not complete, and the crosstalk amplitude after filtering is still higher than the signal carrier amplitude, which makes the demodulation error

In addition, the current signal transmission is mainly in the form of a single frequency carrier, resulting in a low signal transmission rate

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