CN105896753A - Optimal frequency configuration method of single-repeater wireless power transmission system - Google Patents
Optimal frequency configuration method of single-repeater wireless power transmission system Download PDFInfo
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- CN105896753A CN105896753A CN201610393292.9A CN201610393292A CN105896753A CN 105896753 A CN105896753 A CN 105896753A CN 201610393292 A CN201610393292 A CN 201610393292A CN 105896753 A CN105896753 A CN 105896753A
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Abstract
The invention discloses an optimal frequency configuration method of a single-repeater wireless power transmission system. The single-repeater wireless power transmission system comprises a high-frequency power supply system, a transmitting coil, a repeating coil and a receiving coil. According to the configuration method, with a low coupling coefficient as an entry point, a transmission efficiency expression and a receiving power expression of the single-repeater wireless power transmission system are calculated; and with the working frequency of the system and self-resonant frequencies of various coil circuits as independent variables, the configuration method for various frequency parameters at the optimal transmission efficiency is obtained, so that the configuration method for the working frequency and the self-resonant frequencies of various coil circuits at the maximum receiving power is discussed on the basis of the optimal transmission efficiency. With the optimal transmission efficiency and the maximum receiving power of the wireless power transmission system comprising the repeating coil as targets, a set of complete frequency configuration method is provided; and the key problem of the wireless power transmission system comprising the single repeating coil in the design is solved.
Description
Technical field
The present invention relates to a kind of optimal frequency collocation method containing single repeating coil radio energy transmission system, particularly relate to
And system operating frequency under optimum transmission efficiency and maximal received power target and joining between each wire loop self-resonant frequency
Put method.
Background technology
In the last few years, need not, due to wireless power transmission technology, the friendly convenience that cable connects so that this technology is
Through being applied in more industrial occasions.By contrast, at deep-sea, colliery, the special dimension such as chemical industry, traditional cable
There is more drawback and hidden danger in contact power transmission mode, what it was brought is track laying and maintenance difficult and contact sparking
Deng series of problems.After tesla opens wireless power transmission field, domestic and international many scholars bound oneself to it one after another, but receive
Imitate little.Breaking through in electromagentic resonance principle from MIT in 2007, the bulb of a 60w has been lighted in success beyond 2m, this
Just the development for medium and long distance and high efficiency wireless power transmission technology provides a new thinking.
Using two energy coupled to launch makes circuit be in resonance shape with receiving coil serial or parallel connection electric capacity respectively
State is furtherd investigate every two coil type radio energy transmission systems of sky transmission energy, and its equivalent-circuit model is also by extensively
The general transmission performance for analyzing system.But, two coil type radio energy transmission systems are due to its efficiency to transmission range very
Sensitivity, so being applied in the close contact wireless charging of low-power equipment by more at present.Along with wireless power transmission technology
Constantly widening of application, close contact wireless charging the most increasingly can not meet the demand of masses.Wireless in order to be able to raising
The transmission range of electric energy transmission system, domestic and international many scholars all use the method increasing repeating coil to promote the transmission of system
Distance, but research unmanned for the frequency allocation method under optimal transmission performance.The present invention is to comprise the wireless of repeating coil
Electric energy transmission system optimum transmission efficiency and maximal received power are target, it is proposed that the frequency allocation method of complete set, solve
Certainly contain the crucial problem of the radio energy transmission system of single repeating coil in design packet, for radio energy transmission system in middle long distance
Application under from provides and more specifically instructs.
Summary of the invention
It is an object of the invention to provide a kind of single relay wireless electric energy transmission system optimal frequency allocation method, to solve
Design packet is containing the crucial problem of the radio energy transmission system of single repeating coil, for radio energy transmission system under medium and long distance
Application provide more specifically instruct.
For achieving the above object, the technical solution used in the present invention is:
A kind of single relay wireless electric energy transmission system optimal frequency allocation method, described single relay wireless electric energy transmission system
Including high frequency power source system, transmitting coil, repeating coil and receiving coil；With lower coupling coefficient as point of penetration, calculate single relaying
The efficiency of transmission of radio energy transmission system and receive power expression, and with system operating frequency and each wire loop
Self-resonant frequency is independent variable, draws the collocation method of each frequency parameter under optimum transmission efficiency, then imitates in optimal transmission
On the basis of rate, operating frequency during discussion maximal received power and the collocation method of each wire loop self-resonant frequency.
The present invention specifically comprises the following steps that
Step (1), the basic parameter of setting wireless electric energy transmission system: the frequency driving power supply of high frequency power source system is
ω, the resonant frequency of transmitting coil, repeating coil and receiving coil is respectively ωTX, ωr, ωRX, i.e.Wherein Ct、LtIt is respectively resonant capacitance and the inductance value of transmitting coil；Cr、
LrIt is respectively resonant capacitance and the inductance value of repeating coil；C1、L1It is respectively resonant capacitance and the inductance value of receiving coil；
Step (2), by system effectiveness expression formula:It is derived from electricity during optimum transmission efficiency
Stream Ratio Conditions, i.e.Wherein, It、Ir、I1It is respectively the loop electricity of transmitting coil, repeating coil, receiving coil
Flow valuve, RstFor the total resistance in transmitting coil loop, RrFor the internal resistance of repeating coil, RLFor the resistance of load in receiving coil
Value, R1LFor load resistance and receiving coil internal resistance sum；Thus with transmitting coil, repeating coil and receiving coil loop from humorous
Vibration frequency ωTX、ωr、ωRXIt is configuration object with power drives frequencies omega, draws frequency configuration condition during optimum transmission efficiency
For:Frequency configuration condition during optimum transmission efficiency only with power drives frequency, repeating coil loop
Self-resonant frequency and receiving coil loop self-resonant frequency are correlated with, unrelated with the self-resonant frequency in transmitting coil loop；
Step (3), inquires into frequency configuration condition when receiving power maximum on the basis of system transfers efficiency optimization,
I.e. determine as the electric current I in receiving coil1During modulus value maximum, system operating frequency and remaining each wire loop self-resonant frequency it
Between relation, now need to meet I1Imaginary part be zero, i.e. Im (I1)=0, and now need the frequency configuration condition met to be: ω=
ωTX=ωr≌ωRX, the quality factor of and if only if receiving coilTime, the about equal sign in frequency configuration condition becomes
Vertical.
Beneficial effect: the present invention is to comprise the radio energy transmission system optimum transmission efficiency of repeating coil and maximum reception
Power is target, it is proposed that a set of detailed, concrete, targeted, practical single relay wireless electric energy transmission system optimal
Frequency allocation method, the present invention starts with from optimum transmission efficiency and the maximal received power substep of radio energy transmission system, carries
Go out the configuration relation of the operating frequency under both optimization aim and each wire loop resonant frequency, solved in design is single
Continue the crucial problem of radio energy transmission system, provides the clearest and the most definite for radio energy transmission system application under medium and long distance
Guidance.
Accompanying drawing explanation
Fig. 1 is the structural circuit topological diagram of single relay wireless electric energy transmission system.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described.
It is illustrated in figure 1 a kind of single relay wireless electric energy transmission system, including high frequency power source system, transmitting coil, reception
Coil, repeating coil, high frequency compensation tunable capacitor, load, described high frequency power source system is frequency-adjustable voltage source；Described transmitting
Coil, receiving coil, repeating coil are respectively coaxial resonator coil arranged in parallel, transmitting coil, receiving coil and in
The form of coil of continuing can be inconsistent with parameter；Each coil is connected in series with high frequency compensation tunable capacitor, regulates high frequency compensation
Tunable capacitor can regulate the self-resonant frequency of each wire loop, is launched by EMR electromagnetic resonance coupled modes and receives energy；Institute
Stating load to load for generality, its impedance operator does not limits.ktr、kr1It is respectively transmitting coil and repeating coil, repeating coil and connects
The coefficient of coup between take-up circle.
The optimal frequency collocation method of single relay wireless electric energy transmission system, comprises the steps:
Step (1), the basic parameter of setting wireless electric energy transmission system: drive power supply frequency be ω, transmitting coil, in
The resonant frequency of coil and receiving coil of continuing is respectively ωTX, ωr, ωRX, i.e.
Wherein Ct、LtIt is respectively resonant capacitance and the inductance value of transmitting coil；Cr、LrIt is respectively resonant capacitance and the inductance of repeating coil
Value；C1、L1It is respectively resonant capacitance and the inductance value of receiving coil；
Step (2), by system effectiveness expression formula:It is derived from electricity during optimum transmission efficiency
Stream Ratio Conditions, i.e.Wherein, It、Ir、I1It is respectively the loop electricity of transmitting coil, repeating coil, receiving coil
Flow valuve, RstFor the total resistance in transmitting coil loop, RrFor the internal resistance of repeating coil, RLFor the resistance of load in receiving coil
Value, R1LFor load resistance and receiving coil internal resistance sum；Thus with transmitting coil, repeating coil and receiving coil loop from humorous
Vibration frequency ωTX、ωr、ωRXIt is configuration object with power drives frequencies omega, draws frequency configuration condition during optimum transmission efficiency
For:Frequency configuration condition during optimum transmission efficiency only with power drives frequency, repeating coil loop
Self-resonant frequency and receiving coil loop self-resonant frequency are correlated with, unrelated with the self-resonant frequency in transmitting coil loop；
Step (3), inquires into frequency configuration condition when receiving power maximum on the basis of system transfers efficiency optimization,
I.e. determine as the electric current I in receiving coil1During modulus value maximum, system operating frequency and remaining each wire loop self-resonant frequency it
Between relation, now need to meet I1Imaginary part be zero, i.e. Im (I1)=0, and now need the frequency configuration condition met to be: ω=
ωTX=ωr≌ωRX, the quality factor of and if only if receiving coilTime, the about equal sign in frequency configuration condition becomes
Vertical.
The optimal frequency collocation method of single relay wireless electric energy transmission system of the present invention specifically includes that with lower coupling coefficient
For point of penetration, calculate the efficiency of transmission of single relay wireless electric energy transmission system and receive power expression, and working with system
The self-resonant frequency of frequency and each wire loop is independent variable, draws the configuration side of each frequency parameter under optimum transmission efficiency
Method, then on the basis of optimum transmission efficiency, operating frequency during discussion maximal received power and each wire loop self-resonance
Frequency allocation method.Ultimately form single relay wireless electric energy transmission system frequency collocation method of complete set.The present invention is one
Overlap detailed, concrete, targeted, practical single relay wireless electric energy transmission system optimal frequency allocation method, the present invention
Start with from optimum transmission efficiency and the maximal received power substep of radio energy transmission system, it is proposed that under both optimization aim
The configuration relation of operating frequency and each wire loop resonant frequency, solve in design single relay wireless electric energy transmission system
Crucial problem, provides for radio energy transmission system application under medium and long distance and more specifically instructs.
The above is only the preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (2)
1. single relay wireless electric energy transmission system optimal frequency allocation method, it is characterised in that: described single relay radio
System of transmitting includes high frequency power source system, transmitting coil, repeating coil and receiving coil；With lower coupling coefficient as point of penetration,
Calculate the efficiency of transmission of single relay wireless electric energy transmission system and receive power expression, and with system operating frequency and each
The self-resonant frequency of wire loop is independent variable, draws the collocation method of each frequency parameter under optimum transmission efficiency, then exists
On the basis of optimum transmission efficiency, operating frequency during discussion maximal received power and the configuration of each wire loop self-resonant frequency
Method.
Single relay wireless electric energy the most according to claim 1 transmission system optimal frequency allocation method, it is characterised in that: tool
Body step is as follows:
Step (1), the basic parameter of setting wireless electric energy transmission system: the driving supply frequency of high frequency power source system is ω, launch line
The resonant frequency of circle, repeating coil and receiving coil is respectively ωTX, ωr, ωRX, i.e.
Wherein Ct、LtIt is respectively resonant capacitance and the inductance value of transmitting coil；Cr、LrIt is respectively resonant capacitance and the inductance of repeating coil
Value；C1、L1It is respectively resonant capacitance and the inductance value of receiving coil；
Step (2), by system effectiveness expression formula:It is derived from current ratio during optimum transmission efficiency
Rate condition, i.e.Wherein, It、Ir、I1It is respectively transmitting coil, repeating coil, the loop current of receiving coil
Value, RstFor the total resistance in transmitting coil loop, RrFor the internal resistance of repeating coil, RLFor in receiving coil load resistance value,
R1LFor load resistance and receiving coil internal resistance sum；Thus with transmitting coil, repeating coil and the self-resonance of receiving coil loop
Frequencies omegaTX、ωr、ωRXBeing configuration object with power drives frequencies omega, frequency configuration condition when drawing optimum transmission efficiency is:Frequency configuration condition during optimum transmission efficiency is only with power drives frequency, repeating coil loop certainly
Resonant frequency and receiving coil loop self-resonant frequency are correlated with, unrelated with the self-resonant frequency in transmitting coil loop；
Step (3), inquires into frequency configuration condition when receiving power maximum, the most really on the basis of system transfers efficiency optimization
Electric current I in settled receiving coil1During modulus value maximum, between system operating frequency and remaining each wire loop self-resonant frequency
Relation, now needs to meet I1Imaginary part be zero, i.e. Im (I1)=0, and now need the frequency configuration condition met to be:The quality factor of and if only if receiving coilTime, the about equal sign in frequency configuration condition becomes
Vertical.
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Cited By (6)
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|---|---|---|---|---|
| CN107612153A (en) * | 2017-10-13 | 2018-01-19 | 湖南工业大学 | A kind of new three-winding structure of electric automobile wireless power supply system |
| CN108879986A (en) * | 2018-07-24 | 2018-11-23 | 重庆大学 | Single relay wireless electric energy transmission system parameters design method |
| CN109149791A (en) * | 2018-08-22 | 2019-01-04 | 上海电力学院 | A kind of radio energy transmission system of active relaying device and its composition |
| CN109613333A (en) * | 2018-11-26 | 2019-04-12 | 华中科技大学 | A kind of coil resonance frequency measurement method suitable for radio energy transmission system |
| CN111799900A (en) * | 2020-07-06 | 2020-10-20 | 桂林电子科技大学 | Efficient remote wireless power transmission scheme |
| CN114006478A (en) * | 2021-11-17 | 2022-02-01 | 重庆前卫无线电能传输研究院有限公司 | Electronic mall exhibition and sales table based on wireless power supply and circuit parameter design method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107612153A (en) * | 2017-10-13 | 2018-01-19 | 湖南工业大学 | A kind of new three-winding structure of electric automobile wireless power supply system |
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| CN108879986A (en) * | 2018-07-24 | 2018-11-23 | 重庆大学 | Single relay wireless electric energy transmission system parameters design method |
| CN108879986B (en) * | 2018-07-24 | 2020-06-26 | 重庆大学 | Parameter design method for single-relay wireless power transmission system |
| CN109149791A (en) * | 2018-08-22 | 2019-01-04 | 上海电力学院 | A kind of radio energy transmission system of active relaying device and its composition |
| CN109613333A (en) * | 2018-11-26 | 2019-04-12 | 华中科技大学 | A kind of coil resonance frequency measurement method suitable for radio energy transmission system |
| CN111799900A (en) * | 2020-07-06 | 2020-10-20 | 桂林电子科技大学 | Efficient remote wireless power transmission scheme |
| CN114006478A (en) * | 2021-11-17 | 2022-02-01 | 重庆前卫无线电能传输研究院有限公司 | Electronic mall exhibition and sales table based on wireless power supply and circuit parameter design method thereof |
| CN114006478B (en) * | 2021-11-17 | 2024-01-30 | 重庆前卫无线电能传输研究院有限公司 | Electronic mall exhibition stand based on wireless power supply and circuit parameter design method thereof |
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Application publication date: 20160824 |