Magnetic coupling resonance wireless power transmission method, storage medium and equipment

Abstract

The embodiment of the invention provides a magnetic coupling resonance wireless power transmission method. The method comprises the following steps: detecting mutual inductance Ms-1 and Ms-2 between atransmitting end of the wireless power transmission system and a first receiving end and between the transmitting end and a second receiving end respectively; calculating coupling coefficients Ks-1 and Ks-2 between the transmitting end and the first receiving end and between the transmitting end and the second receiving end according to the mutual inductance Ms-1 and the mutual inductance Ms-2 respectively; detecting mutual inductance M1-2 between the first receiving end and the second receiving end, and calculating a coupling coefficient K1-2 between the first receiving end and the second receiving end according to the mutual inductance M1-2; calculating a series compensation inductance according to the calculated coupling coefficients Ks-1, Ks-2 and K1-2, and accessing calculated inductance; and calculating an LC value according to the calculated coupling coefficients Ks-1, Ks-2 and K1-2, and adjusting LC impedance matching network parameters to the calculated LC value. The influence of cross coupling between the receiving ends on power transmission is reduced, and the transmission efficiency and the output power of the wireless power transmission system are improved.

Description

technical field [0001] The present invention relates to the technical field of power transmission, in particular to a magnetic coupling resonance wireless power transmission method, storage medium and equipment. Background technique [0002] Wireless power transfer (wireless power transfer, WPT), also known as wireless power transfer, non-contact power transfer, wireless charging, refers to the use of energy carriers in physical space to transmit electric energy through non-wire and non-contact methods. It gets rid of the shackles of traditional wires, making power transmission more flexible and safer, and has a wide range of application scenarios. [0003] The magnetic coupling resonance method adopts magnetic field induction. By adjusting the parameters of the transmitting and receiving coils, the transmitting and receiving coils have the same resonance frequency. When the frequency of the high-frequency power supply of the system is at the resonance frequency, the system ...

AI Technical Summary

Problems solved by technology

The framework of the multi-receiver magnetically coupled resonant system is as follows figure 1 As shown, the existing technologies only focus on a single receiving end system, build a magnetically coupled resonant wireless power transmission system, and apply automatic adjustment impedance matching technology to improve system efficiency and output power, but do not consider the application scenarios of multiple receiving ends

[0005] In the process of implementing the present invention, the inventors of the present application found that in the above-mentioned scheme of the prior art, in the case of multiple receiving ends, when the relative positions of the receiving ends are relatively close, there is cross-coupling between the receiving ends so that it is equivalent to the sending The reflection impedance of the terminal is not a pure resistance, which will affect the calculation and adjustment of the parameters of the impedance matching network.

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