Maximum efficiency tracking method for electric field coupling type underwater wireless power transmission system

Abstract

The invention discloses a maximum efficiency tracking method for an electric field coupling type underwater wireless power transmission system. The method comprises the steps of firstly, building a coupling capacitance model of the electric field coupling type underwater wireless power transmission system, and achieving the simulation of coupling capacitance based on a water medium; then constructing an equivalent circuit model of a wireless power transmission unit of the electric field coupling type underwater wireless power transmission system, calculating the equivalent output resistance under the condition of the maximum energy transmission efficiency, searching the relation between the equivalent output resistance and the coupling capacitance under the condition of the maximum energytransmission efficiency, and constructing the maximum energy transmission efficiency by detecting the value of the coupling capacitance; and finally, adjusting the switching frequency of a full-bridgeinverter circuit at the transmitting end and the phase shift angle of a full-bridge rectifier circuit at the receiving end in real time according to the detected coupling capacitance value, so that the maximum energy transmission efficiency of the wireless power transmission system is tracked. According to the invention, the problem that the charging power of underwater equipment is unstable dueto ocean current, water pressure, temperature, salinity and other factors in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission, and in particular relates to a maximum efficiency tracking method for an electric field coupling type underwater wireless power transmission system. Background technique [0002] Today, the major technical challenge for the construction and long-term operation and maintenance of large-scale underwater intelligent systems and military facilities (such as underwater sensors, ocean monitoring systems, and autonomous underwater vehicles (AUVs)) is the lack of safe and reliable energy supply. Especially in deep sea conditions, compared with other power transmission methods (replacing batteries and cables), wireless power transmission systems have significant advantages of high reliability and high safety, and are more suitable for autonomous underwater vehicles or other underwater platforms. Therefore, the research on the key technologies of the underwater wireless power transmissi...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for tracking the maximum efficiency of an electric field-coupled underwater wireless power transmission system, which solves the problem of charging power caused by underwater equipment in the prior art due to factors such as ocean currents, water pressure, temperature, and salinity. unstable problem

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