Wireless power transmission system power efficiency optimization method based on matching efficiency set element exhaustion method

A technology for wireless power transmission and power efficiency, applied in electrical components, circuit devices, etc., can solve problems such as missing applications, and achieve the effect of power efficiency optimization

Active Publication Date: 2016-08-24
SOUTHEAST UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

When both the transmitting side and the receiving side are restricted and

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  • Wireless power transmission system power efficiency optimization method based on matching efficiency set element exhaustion method
  • Wireless power transmission system power efficiency optimization method based on matching efficiency set element exhaustion method
  • Wireless power transmission system power efficiency optimization method based on matching efficiency set element exhaustion method

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Embodiment Construction

[0027] The present invention will be further explained below in conjunction with the accompanying drawings.

[0028] like figure 1 As shown, a method for optimizing the power efficiency of a wireless power transfer system based on the matching efficiency set element exhaustion method, the wireless power transfer system includes a transmitting coil, a relay coil, and a receiving coil coaxially arranged with a coil radius r, and the transmitting coil and the distance between the receiving coil is d 02 , and satisfy d 02 =(10~12)r. The transmitting coil is connected in series with the primary compensation capacitor to the high-frequency power supply, the relay coil is connected in series with the adjustable relay supplementary capacitor, and the receiving coil is connected in series with the secondary compensation capacitor to connect the load. The number of turns of the transmitting coil and the receiving coil is N, the number of turns of the relay coil is 2N, the effective n...

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Abstract

The invention discloses a wireless power transmission system power efficiency optimization method based on a matching efficiency set element exhaustion method. The method comprises the implementation of joint optimization of the power and the efficiency under the wireless power transmission efficiency matching state. Aiming at the wireless power transmission system which requires a medium transmission distance and has unchangeable emitting side and receiving side, the invention firstly provides a method for dynamically changing a position of a relay coil and the turns of the coil to implement the condition that the system can product a plurality of matching efficiency points and power points corresponding to the matching efficiency points when a load with a fixed size is connected to the system; and secondly adopts the exhaustion method to select appropriate power and efficiency point as the working point of the system among the plurality of produced matching efficiency points and the corresponding power points. The method has the characteristics that the requirement of the system for the efficiency is first satisfied, and the required transmission efficiency must be higher than 50%, and then the efficiency and the power are optimized on the basis of the abovementioned conditions.

Description

technical field [0001] The invention relates to a method for optimizing the power efficiency of a wireless power transmission system, which is suitable for the wireless power transmission system in the meter-level middle-distance wireless power transmission without changing the parameters of the transmitting end and the receiving end. Background technique [0002] At the technical level of medium-distance wireless power transmission, how to optimize load power and transmission efficiency has always been a hot research issue. At present, in order to achieve higher power and higher efficiency wireless transmission of electric energy in long-distance occasions, firstly, the resonant frequency of the system is usually relatively high, which can reach several MHz to tens of MHz; secondly, a resonant coil with a larger size is designed To improve the transmission performance; thirdly, optimize the system parameters to achieve the impedance matching of the system. However, at a hi...

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Application Information

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IPC IPC(8): H02J50/10H02J50/50
Inventor 谭林林颜长鑫黄学良郭金鹏刘瀚王维潘书磊李佳承
Owner SOUTHEAST UNIV
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