Wireless energy transmission system and method

Abstract

The invention relates to a wireless energy transmission system and method; the method uses a switch to switch a receiving circuit between an energy storage mode and a discharge mode; when the switch is closed, a load is shorted, and a secondary resonance circuit is in the energy storage mode; when the switch is disconnected, the load is connected, the secondary resonance circuit is in the discharge mode, and the stored energy is released to the load; the method can use the secondary resonance circuit to serve as the current source input of an AC-DC converter of the receiving circuit, thus improving the voltage transition ratio, improving the output voltage, and satisfying the high output voltage application requirements without needing an extra off-chip capacitor; the method can close a power amplifier at a proper time, thus saving emission energy, and improving the system transmission efficiency; the method needs no complex feedback technology or wireless communication technology, andcan return a mode switch signal from the receiving circuit to an emission circuit, thus greatly reducing the system complexity.

Description

technical field [0001] The present invention relates to the field of wireless energy transmission, in particular to a wireless energy transmission system and method. Background technique [0002] Like wireless communication technology, getting rid of the shackles of tangible media and realizing wireless energy transmission has always been the pursuit of human beings. At the end of the 19th century, Nikola Tesla began research on wireless energy transmission. He lit a gas discharge tube with an electric field, proving that wireless energy transmission is possible, and predicted that humans will completely solve the problem of wireless power supply in a few decades. In recent years, with the continuous development and improvement of wireless transmission and electromagnetic theory, especially the rapid development of wireless energy transmission technology based on magnetic coupling resonance, wireless energy transmission technology has become one of the hot spots of domestic ...

AI Technical Summary

Problems solved by technology

[0004] Therefore, in order to increase the voltage conversion ratio V OUT / V R , to increase the output voltage, the existing technology adopts AC-DC multi-voltage rectifier or DC-DC charge pump to realize, but it will increase the system area and the complexity of the receiver; and because it uses the secondary resonant circuit as an AC-DC The voltage source input of the conversion circuit also greatly limits the size of the maximum output voltage on the load

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