Identification and resonance decoupling method based on resonant wireless power transfer technology

Abstract

The invention discloses an identity identification and resonance decoupling method based on resonance wireless energy transmission technology, including an identity identification method and a resonance decoupling method; The resonant frequency of the coil and the receiving coil undergoes random synchronous hopping according to the pseudo-random code sequence. When the frequency hopping clock, frequency hopping frequency, and frequency hopping sequence of the power transmitting and receiving parties are completely consistent, an energy channel is established; the resonance decoupling The method is to hop the working frequency according to a predetermined rule, and cut off the coupling magnetic field between the transmitting end of the wireless power transmission system and the resonant coil at the illegal receiving end. The invention can simplify the whole system of identification and resonance decoupling, improve the reliability of the system, improve the performance of the system and help to reduce the production cost.

Description

technical field [0001] The invention belongs to the field of wireless power transmission, in particular to an identification and resonance decoupling method based on resonance wireless power transmission technology. Background technique [0002] The charging of electrical equipment is generally carried out through plugs and sockets, but when high-power charging is performed, there is a risk of high-voltage electric shock in this charging method. And due to the existence of friction and wear, the safety, reliability and service life of the system are low, especially in some flammable and explosive fields such as chemical industry and mining, which can easily cause major accidents. The new wireless power transmission system uses the combination of electromagnetic induction principle, power electronics technology and control theory to realize the wireless transmission of electric energy and completely overcome the above limitations in specific applications. [0003] The main p...

AI Technical Summary

Problems solved by technology

After the wireless power transmission channel is established, it cannot judge whether the resonant coil with the same resonant frequency as the transmitting coil is "stealing electricity", and thus cannot avoid the resonant frequency of the current wireless power transmission, so it cannot completely solve the problem of "stealing electricity". make the system unreasonable

At the same time, when multiple receiving coils are required to supply power at the same time, due to the complex interaction between their impedances, the resonance frequency point shifts, which affects the work of the RF power amplifier, which in turn leads to a decrease in wireless power transmission efficiency and system reliability. low