Ultrasonic radio energy transmission system based on adaptive control

Abstract

The invention discloses an ultrasonic radio energy transmission system based on adaptive control, comprising an energy transmission part and an adaptive control part. An ultrasonic power source converts direct current into high-frequency alternating current to drive a transmitting transducer, and the transmitting transducer converts the alternating current into ultrasonic wave and sends the ultrasonic wave into a medium, and transmits the ultrasonic wave to a receiving transducer through the medium; The receiving transducer converts the received ultrasonic wave into high-frequency alternatingcurrent, and supplies power to the load after passing through the receiving circuit; The energy management module realizes the control of the receiving circuit and transmits the state of the load to the signal feedback path. The signal feedback path is transmitted to the dynamic impedance matching which realizes the closed-loop control of the ultrasonic power supply and adjusts the working state of the ultrasonic power supply according to the received load state signal. This kind of system can realize wireless charging in metal enclosed situation, realizes closed loop control of the system, and improves stability and reliability.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission and power conversion, in particular to an ultrasonic wireless power transmission system based on adaptive control. Background technique [0002] With the increasing popularity of electrical equipment, the traditional power supply mode based on contact conduction has problems such as unreliable contact, poor safety, and poor mobility. However, wireless power transmission technology achieves power transmission without direct electrical contact through other forms of carriers. It has the characteristics of high mobile flexibility and strong environmental adaptability, and has received more and more attention. [0003] There are four main implementation methods of wireless power transmission technology: electromagnetic, ultrasonic, laser and microwave. The electromagnetic type and the ultrasonic type are suitable for short-distance wireless power transmission occasions, and the la...

AI Technical Summary

Problems solved by technology

However, the current research on the ultrasonic wireless power transmission system is relatively shallow. The existing research is open-loop control. When the external environment such as temperature changes, the system will not work stably and the efficiency will drop significantly.

In addition, the open-loop system cannot reflect the charging status of the load in real time, and overcharging will cause damage to the system and load, and reduce system reliability.

At the same time, the power level of the currently researched ultrasonic wireless power transfer system is low, which limits the application of the power transfer system in some fields

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