Electric field coupling-based wireless power transmission system

Abstract

The invention discloses an electric field coupling-based wireless power transmission system. The system comprises a power supply circuit, a high-frequency inverter circuit, a tuning circuit, an electric field coupling polar plate, a rectifier filter circuit and a load circuit and is characterized by also comprising a coupling capacitance detection module, a controller and a fixed frequency drive circuit; a capacitance compensation array is arranged in the tuning circuit; the controller detects parameters of the electric field coupling polar plate and controls compensation values of the capacitance compensation array through the coupling capacitance detection module, and outputs fixed frequency control signals; and the fixed frequency signals are transmitted to the fixed frequency drive circuit, and then the high-frequency inverter circuit is driven to work. The electric field coupling-based wireless power transmission system has the advantages that based on the electric field coupling, the transmission capacity and efficiency of the system are improved by adopting an E amplifier; and by arranging the coupling capacitance detection module, the electric field coupling polar plate of the system is detected in real time, and the capacitance compensation value can be effectively controlled, so that the system is kept in the soft switching state, and the power transmission stability and reliability of the system are improved.

Description

technical field [0001] The present invention relates to wireless power transmission technology, in particular, a wireless power transmission system based on electric field coupling. Background technique [0002] With the advancement of science and technology, people have higher and higher requirements for power quality, requiring it to be portable, safe, efficient, and environmentally friendly. become possible. The so-called Wireless Power Transmission Technique refers to the comprehensive utilization of modern power electronics energy conversion technology, circuit theory, microelectronics technology and modern control technology to realize the power from the power supply (grid or battery) through soft media (such as electric field, Magnetic fields, microwaves, lasers, etc.) are transmitted to electrical equipment in a non-electrical contact mode, or electrical equipment returns energy to the power supply through a soft medium. [0003] At present, the research of wireles...

AI Technical Summary

Problems solved by technology

However, in ICPT technology, the problem of electromagnetic interference and the blocking of energy transmission by metal obstacles have always been the key issues affecting the further development of ICPT technology.

[0006] However, in the existing ECPT system applications, since the coupling plate is usually a separate structure, the transmission distance may change under different coupling states during the working process, which will cause changes in the system structural parameters, resulting in a decrease in the power transmission capacity of the system. and transmission efficiency drop, and even the system will be in an unstable working state

A comprehensive analysis of existing patents and literature shows that there is no good solution to this key technical problem

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