Power matching design method of magnetic-coupling resonance wireless energy transmission system

A technology of wireless energy transmission and magnetic coupling resonance, applied in electromagnetic wave systems, electrical components, circuit devices, etc., can solve the problems of transmission efficiency and distance decline, lack of wireless energy transmission systems, etc.

Active Publication Date: 2013-11-27
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
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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
At present, how to design a wireless energy transfer system that meets the conditions of magnetic resonance in engineering still lacks corresponding methods

Method used

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  • Power matching design method of magnetic-coupling resonance wireless energy transmission system
  • Power matching design method of magnetic-coupling resonance wireless energy transmission system
  • Power matching design method of magnetic-coupling resonance wireless energy transmission system

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Embodiment Construction

[0030] Such as figure 1 As shown, a magnetic coupling resonance wireless energy transfer system usually consists of a high-frequency power supply 1, a transmitting coil 2, a receiving coil 3, a first and a second tuning capacitor C S 、C D , load 4 and other parts, the transmission power supply 1 is connected in series with the first resonant capacitor C S Connected to both ends of the transmitting coil 2, the receiving coil 3 is connected in series with the second resonant capacitor C D connected to both ends of the load, thereby establishing an equivalent model of the system.

[0031] ( ) figure 1 The system shown can be equivalent as figure 2 The two-port network model shown, in which the transmitting coil 2, the receiving coil 3, the first and second tuning capacitors C S 、C D To form a two-port network, the two endpoints of the transmitting end (both ends of the high-frequency power supply) I-I' constitute the first port, and the two endpoints of the receiving end...

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Abstract

The invention discloses a power matching method of magnetic-coupling resonance wireless energy transmission system optimization design. The method comprises the following steps of: 1, establishing an equivalent two-port network model of a magnetic-coupling resonance wireless energy transmission system; 2, analyzing characteristics of the two-port network model by adopting a power wave method; 3, and defining power transmission efficiency of the magnetic-coupling resonance wireless energy transmission system, so as to obtain a power matching condition of the system and provide guidance for engineering optimization design. The power matching design method has the advantages of: 1, the physical significance is clear; 2, the calculation process is simple and easy to implement; 3, and the power matching condition that power acquired from the load is greatest upon the maximum system wireless energy transmission efficiency is achieved.

Description

technical field [0001] The invention belongs to the technical field of wireless energy transmission, and in particular relates to a power matching method for optimal design of a magnetic coupling resonance wireless energy transmission system. 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. How to achieve efficient transmission of electric energy is one of the core issues of wireless energy transmission technology. The current commonly used method is based on the principle of electromagnetic induction, that is, to set two transmitting and receiving coils close to each other. When the current flowing in the transmitting coil changes, the magnetic flux passing through the receiving coil will also change. Due to electromagnetic induction The induced electromotive force is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00H02J50/12
Inventor 杨拥民骆彦廷陈仲生钱彦岭胡政王磊
Owner NAT UNIV OF DEFENSE TECH
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