Electric energy and signal synchronous transmission method based on frequency splitting in electric energy wireless transmission

Abstract

The present invention discloses an electric energy and signal synchronous transmission method based on frequency splitting in an ICPT (Inductively Coupled Power Transfer) system, in the method, a transmission system with a primary side resonance circuit and a secondary side resonance circuit is adopted, a controller in the system selects a time-delay interference parameter according to a digital signal, and forms an output control signal on the reference of a primary side resonance current zero-crossing detection signal for outputting to a drive circuit module, thereby finally achieving the purpose that the system switches between two autonomous stable resonant frequencies according to the digital signal to achieve signal frequency modulation and transmission; in addition, the secondary side resonance circuit is additionally provided with a coupling coil and a signal extraction and recovery module, which can achieve the process of coupling and picking a signal from the secondary side resonance circuit and performing recovery through the signal extraction and recovery module to obtain the digital signal. The electric energy and signal synchronous transmission method of the present invention facilitates high-efficiency transmission of electric energy in the ICPT system while achieving reliable transmission of signals in the case of not changing a topological structure of a main circuit of the ICPT system.

Description

technical field [0001] The invention relates to an inductively coupled power and signal synchronous transmission method, in particular to a frequency split-based power and signal synchronous transmission method in power wireless transmission. Background technique [0002] 1. Introduction to inductive coupling power transmission technology and signal transmission requirements [0003] Inductively coupled power transfer (hereinafter referred to as ICPT) technology is a new power transmission technology that uses high-frequency electromagnetic fields as the power carrier to wirelessly transmit power from the power supply to the load in the form of magnetic energy. The technology has the advantages of safety, reliability and flexibility. Inductively coupled power transfer technology has broad application prospects in the fields of rail transit, electric vehicles, consumer electronics, and biomedicine, and has become one of the research hotspots in the field of electrical engine...

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Problems solved by technology

[0029] (1) At γ=1 (critical coupling), when the system works at the resonance point, the system voltage gain is the maximum; at γ>1 (over-coupling), there is a frequency splitting phenomenon, but no matter at which resonance frequency point, the voltage The gain can achieve a maximum value; at γ<1 (under-coupling), with the decrease of the

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