Self-tuning magnetic-coupling resonance wireless energy transmission system and self-tuning method thereof

Abstract

The invention discloses a self-tuning magnetic-coupling resonance wireless energy transmission system and a self-tuning method thereof. The system comprises a transmitting terminal circuit and a receiving terminal circuit, wherein the transmitting terminal circuit is formed by electrically connecting a high-frequency power supply, a transmitting terminal power matching circuit, a transmitting terminal directional coupler detection circuit, a transmitting terminal tuning capacitor and a transmitting coil in sequence; the receiving terminal circuit is formed by electrically connecting a receiving coil, a receiving terminal tuning capacitor, a receiving terminal directional coupler detection circuit, a receiving terminal power matching circuit, a rectifying and converting circuit and a load in sequence; and a two-port network is formed by the transmitting coil, the receiving coil, the transmitting terminal tuning capacitor and the receiving terminal tuning capacitor. The invention has the advantages that: 1, the self-tuning process is conducted online, and the system has strong self-adaptive ability; 2, the self-tuning control structure is simple and easy to implement; 3, and the system is kept in a magnetic-coupling resonance state, and has high power transmission efficiency.

Description

technical field [0001] The invention belongs to the field of wireless energy transmission, and in particular relates to a self-tuning magnetic coupling resonance wireless energy transmission system and a self-tuning method thereof. Background technique [0002] Wireless energy transmission technology can provide power to loads without cables, and has urgent application needs in wireless networks, robots, mobile terminal equipment, intelligent transportation, medicine and other fields. Although the traditional wireless transmission method based on electromagnetic induction is simple in principle and easy to implement, its transmission efficiency is closely related to the transmission distance. The larger the distance, the sharper the transmission efficiency will drop, so its energy transmission distance is very limited. Works effectively within a few centimeters. [0003] In recent years, a medium-distance wireless energy transmission technology based on magnetic coupling re...

AI Technical Summary

Problems solved by technology

However, magnetic resonance is a prerequisite for this method, and its transmission efficiency and distance drop sharply once the resonance is lost

In practical applications, factors such as changes in coil position, changes in coil capacitance and inductance caused by the environment, and load changes will cause the pre-designed magnetic coupling resonance system to deviate from the resonance state. Manual tuning is time-consuming, labor-intensive, and low-precision. There is an urgent need for a self-tuning method to adjust the parameters of the magnetic coupling resonance wireless energy transfer system online to keep the system in the magnetic coupling resonance state

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