CN105932786A - Different quantities of load access-based single relay multi-load wireless power transmission system work frequency stabilizing method - Google Patents
Different quantities of load access-based single relay multi-load wireless power transmission system work frequency stabilizing method Download PDFInfo
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- CN105932786A CN105932786A CN201610392655.7A CN201610392655A CN105932786A CN 105932786 A CN105932786 A CN 105932786A CN 201610392655 A CN201610392655 A CN 201610392655A CN 105932786 A CN105932786 A CN 105932786A
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Abstract
The present invention discloses a different quantities of load access-based single relay multi-load wireless power transmission system work frequency stabilizing method. The single relay multi-load wireless power transmission system includes a high-frequency power system, a transmit coil, a plurality of receive coils, and a relay coil. The method includes the steps of on the basis of balance power allocation of the receive coils, setting an overall space distribution manner of the receive coils, then deducing a system work frequency and a relationship between all coil loop self-resonant frequencies under the conditions of optimal transmission efficiency and maximum receive power, obtaining factors affecting system working frequency, and adjusting the system work frequency by changing a distribution diameter of different quantities of receive coils, so as to maintain the system work frequency unchanged to keep charging power of each load balanced. Through adoption of the method, a major problem of the wireless power transmission system including the single relay multi-load mode is solved, and a clearer guide for multi-load application of the wireless power transmission system in a middle-long range is provided.
Description
Technical field
The present invention relates to the work of a kind of list relaying multi load radio energy transmission system accessed based on varying number load
Working frequency antihunt means, particularly relate to the stably side of the system operating frequency under optimum transmission efficiency and maximal received power target
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 frequency stable when accessing is loaded for the operating frequency antihunt means particularly varying number under optimal transmission performance
Method unmanned research.The present invention is to comprise the radio energy transmission system optimum transmission efficiency of repeating coil and maximum reception merit
Rate is target, it is proposed that a kind of based on optimum working frequency antihunt means, it is intended to solve to comprise single relaying multiple load modes wireless
The crucial problem of electric energy transmission system, provides the clearest and the most definite for radio energy transmission system multi load application under medium and long distance
Guidance.
Summary of the invention
It is an object of the invention to provide a kind of list relaying multi load wireless power transmission accessed based on varying number load
System operating frequency antihunt means, it is intended to solve to comprise single crucial problem relaying multiple load modes radio energy transmission system,
There is provided for radio energy transmission system multi load application under medium and long distance and more specifically instruct.
For achieving the above object, the technical solution used in the present invention is:
A kind of list relaying multi load radio energy transmission system operating frequency stably side accessed based on varying number load
Method, described single relaying multi load radio energy transmission system include high frequency power source system, transmitting coil, some receiving coils, in
Continue coil；Described operating frequency antihunt means are: based on power receiving coil distribution equilibrium, set the entirety of receiving coil
System operating frequency under the conditions of space distribution modes, derivation optimum transmission efficiency then and maximal received power returns with each coil
Relation between the self-resonant frequency of road, and draw the factor affecting system operating frequency, use change varying number receiving coil
The method of distribution radius adjusts system operating frequency so that system operating frequency is not changed by the increase and decrease of receiving coil quantity,
Realize the charge power equilibrium in each load.
The present invention concretely comprises the following steps:
Step (1), with each receiving coil reception power equalization as principle, sets several receiving coil arrangement modes；
Step (2), calculates the factor affecting system operating frequency, i.e. with system optimal efficiency of transmission and load-receipt power
Being target to the maximum, the relation between the self-resonant frequency of system operating frequency and remaining each wire loop of trying to achieve is:Wherein ω is the power drives frequency of high frequency power source system, ωTX、ωr、ωRXIt is respectively and sends out
The self-resonant frequency of ray circle, repeating coil and receiving coil loop,Respectively receive with remaining for any one receiving coil
Coefficient of coup sum between coil, it is the most relevant with the arrangement radius of the quantity of receiving coil and receiving coil；
Step (3), based on Neumann mutual inductance computing formula, the arrangement radius of varying number receiving coil is carried out by
One distribution so that when receiving coil quantity changes, system operating frequency keeps constant, it is assumed that any two receiving coil
Between the coefficient of coup and two hub of a spools distance between the coefficient of coup with f (d) represent, d is the distance between two hub of a spools, then close
In varying number receiving coil arrangement radius r3～rnWith coefficient of coup sumCorresponding relation be: and if only if, and n takes not
With value,Time equal, system operating frequency keeps constant, thus can get the row corresponding to the receiving coil of varying number
Cloth radius value.
In step (1), several receiving coil arrangement modes described are: several receiving coils are under space three-dimensional
Copline state, its distribution plane and transmitting coil, receiving coil are the most parallel, and several receiving coils are regular polygon distribution,
Several receiving coils lay respectively on multiple summits of this regular polygon, the center of described regular polygon and transmitting coil, in
The continue center of coil is coaxial.
Beneficial effect: the present invention is based on power receiving coil distribution equilibrium, and the overall space that receiving coil is discussed divides
System operating frequency under the conditions of cloth method, derivation optimum transmission efficiency then and maximal received power and each wire loop are from humorous
Relation between vibration frequency, and draw the factor affecting system operating frequency, use change varying number receiving coil distribution half
The method in footpath adjusts system operating frequency so that system operating frequency is not changed, end form by the increase and decrease of receiving coil quantity
Become the list relaying multi load radio energy transmission system operating frequency antihunt means of complete set, and can realize in each load
Charge power equalizes.Solve at the single crucial problem relaying multi load radio energy transmission system of design, pass for radio energy
Transferring technology multi load application under medium and long distance provides more specifically to be instructed.
Accompanying drawing explanation
Fig. 1 is circuit topology and the load distribution figure of the present invention；
Fig. 2 be several receiving coils be regular polygon distribution schematic diagram.
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 relaying multi load radio energy transmission system, including high frequency power source system, launches line
Circle, repeating coil, several receiving coils, high frequency compensation tunable capacitor, load, described high frequency power source system is frequency adjustable
Potential source；Described transmitting coil, repeating coil and receiving coil distribution shape are coaxial arranged in parallel, transmitting coil, reception line
The form of circle and repeating coil can be inconsistent with parameter, but the form of each receiving coil must be identical with parameter；Each
Coil is connected in series with high frequency compensation tunable capacitor, and regulation high frequency compensation tunable capacitor can regulate the self-resonance of each wire loop
Frequency, is launched by EMR electromagnetic resonance coupled modes and receives energy；Described load is general load, and its impedance operator does not limits,
But its size needs equal.As space is limited, figure only gives the receiving coil distribution shape under these several quantity of 3≤n≤6, ktr
For the coefficient of coup between transmitting coil and repeating coil, kr1～kr4The coefficient of coup between repeating coil and each receiving coil respectively,
Its value is the most equal.
The list relaying multi load radio energy transmission system operating frequency antihunt means accessed based on varying number load, bag
Include following steps:
Step (1), with each receiving coil reception power equalization as principle, sets several receiving coil arrangement modes；Tool
Body is: several receiving coils are in copline state under space three-dimensional, and its distribution plane and transmitting coil, receiving coil are equal
Parallel, several receiving coils are regular polygon distribution, and several receiving coils lay respectively at multiple summits of this regular polygon
On, the center of described regular polygon is coaxial with the center of transmitting coil, repeating coil；
As it is shown in figure 1, in figure 1., 2., 3., be 4. 4 receiving coils, 4 receiving coils are under space three-dimensional
Copline state, and the plane at 4 receiving coil places is the most parallel in transmitting coil, receiving coil；As in figure 2 it is shown, several
Receiving coil is regular polygon distribution, and several receiving coils lay respectively on multiple summits of this regular polygon, regular polygon
Center coaxial with the center of transmitting coil, repeating coil；As a example by n=3, now 3 receiving coils are equilateral triangle distribution,
3 receiving coils lay respectively on the summit of this equilateral triangle, and the center of this equilateral triangle and transmitting coil, repeating coil
Center is coaxial；
Step (2), calculates the factor affecting system operating frequency, i.e. with system optimal efficiency of transmission and load-receipt power
Being target to the maximum, the relation between the self-resonant frequency of system operating frequency and remaining each wire loop of trying to achieve is:Wherein ω is the power drives frequency of high frequency power source system, ωTX、ωr、ωRXIt is respectively
The self-resonant frequency of transmitting coil, repeating coil and receiving coil loop,Respectively connect with remaining for any one receiving coil
Coefficient of coup sum between take-up circle, it is the most relevant with the arrangement radius of the quantity of receiving coil and receiving coil；
Step (3), based on Neumann mutual inductance computing formula, as a example by receiving coil quantity 3～6, to varying number
The arrangement radius of receiving coil distributes one by one so that when receiving coil quantity changes, and system operating frequency keeps
Constant, it is assumed that the coefficient of coup between any two receiving coil and the coefficient of coup between two hub of a spools distance represent with f (d), d
It is the distance between two hub of a spools, then about varying number receiving coil arrangement radius r3～r6With coefficient of coup sum's
Corresponding relation is as shown in table 1 below:
Table 1
And if only if Time, system operating frequency keeps constant, thus can get the row corresponding to the receiving coil of varying number
Cloth radius value.
The list relaying multi load radio energy transmission system operating frequency based on varying number load access of the present invention is steady
The method of determining specifically includes that based on power receiving coil distribution equilibrium, the overall space location mode of receiving coil is discussed, continues
And the system operating frequency under the conditions of derive optimum transmission efficiency and maximal received power and each wire loop self-resonant frequency it
Between relation, and draw the factor affecting system operating frequency, the method using change varying number receiving coil distribution radius
Adjust system operating frequency so that system operating frequency is not changed by the increase and decrease of receiving coil quantity, ultimately forms a set of complete
Whole list relaying multi load radio energy transmission system operating frequency antihunt means, and the charge power in each load can be realized
Equilibrium, solves at the single crucial problem relaying multi load radio energy transmission system of design, exists for wireless power transmission technology
Multi load application under medium and long distance provides more specifically to be instructed.
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 (4)
1. the list relaying multi load radio energy transmission system operating frequency antihunt means accessed based on varying number load,
It is characterized in that: described single relaying multi load radio energy transmission system includes high frequency power source system, transmitting coil, some receptions
Coil, repeating coil；Described operating frequency antihunt means are: based on power receiving coil distribution equilibrium, set and receive line
Circle overall space distribution mode, the system operating frequency under the conditions of derivation optimum transmission efficiency then and maximal received power with
Relation between each wire loop self-resonant frequency, and draw the factor affecting system operating frequency, use change varying number
The method of receiving coil distribution radius adjusts system operating frequency so that system operating frequency is not increased and decreased by receiving coil quantity
And change, it is achieved the charge power equilibrium in each load.
The list relaying multi load radio energy transmission system work accessed based on varying number load the most according to claim 1
Working frequency antihunt means, it is characterised in that: concretely comprise the following steps:
Step (1), with each receiving coil reception power equalization as principle, sets several receiving coil arrangement modes；
Step (2), calculates the factor affecting system operating frequency, i.e. maximum with system optimal efficiency of transmission and load-receipt power
For target, the relation between the self-resonant frequency of system operating frequency and remaining each wire loop of trying to achieve is:Wherein ω is the power drives frequency of high frequency power source system, ωTX、ωr、ωRXIt is respectively and sends out
The self-resonant frequency of ray circle, repeating coil and receiving coil loop,Respectively receive with remaining for any one receiving coil
Coefficient of coup sum between coil, it is the most relevant with the arrangement radius of the quantity of receiving coil and receiving coil；
Step (3), based on Neumann mutual inductance computing formula, divides one by one to the arrangement radius of varying number receiving coil
Joining so that when receiving coil quantity changes, system operating frequency keeps constant, it is assumed that between any two receiving coil
The coefficient of coup between the coefficient of coup and two hub of a spools distance represents with f (d), and d is the distance between two hub of a spools, then about not
With quantity receiving coil arrangement radius r3～rnWith coefficient of coup sumCorresponding relation be: and if only if, and n takes different value,Time equal, system operating frequency keeps constant, thus can get the arrangement radius corresponding to the receiving coil of varying number
Value.
The list relaying multi load radio energy transmission system work accessed based on varying number load the most according to claim 2
Working frequency antihunt means, it is characterised in that: in step (1), several receiving coil arrangement modes described are: several receive line
Circle is in copline state under space three-dimensional, and its distribution plane and transmitting coil, receiving coil are the most parallel, and several receive line
Circle is distributed in regular polygon, and several receiving coils lay respectively on multiple summits of this regular polygon, described regular polygon
Center is coaxial with the center of transmitting coil, repeating coil.
The list relaying multi load radio energy transmission system work accessed based on varying number load the most according to claim 2
Working frequency antihunt means, it is characterised in that: in step (3), as a example by receiving coil quantity 3～6, to varying number receiving coil
Arrangement radius distribute one by one so that when receiving coil quantity changes, system operating frequency keep constant, it is assumed that
The coefficient of coup between any two receiving coil and the coefficient of coup between two hub of a spools distance represent with f (d), and d is two coils
In distance in the heart, then arrange radius r about varying number receiving coil3～r6With coefficient of coup sumCorresponding relation
For: when receiving coil quantity is 3, arrangement is shaped as equilateral triangle,ForWhen receiving coil quantity is 4, row
Cloth is shaped as square,ForWhen receiving coil quantity is 5, arrangement is shaped as regular pentagon,ForWhen receiving coil quantity is 6, arrangement is shaped as regular hexagon,ForAnd if only if Time, system operating frequency keeps constant, thus available difference
Arrangement radius value corresponding to the receiving coil of quantity.
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Cited By (4)
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| CN109638977A (en) * | 2019-01-25 | 2019-04-16 | 南京理工大学 | A kind of solid space multinode power equalization wireless power supply system and method |
| CN110867917A (en) * | 2019-11-01 | 2020-03-06 | 东南大学 | Design method of three-dimensional wireless power transmission system in multi-load application scene |
| CN111931299A (en) * | 2020-06-02 | 2020-11-13 | 西安理工大学 | Optimal design method of planar spiral coil in magnetic coupling resonance wireless power transmission application |
| CN112803616A (en) * | 2020-12-31 | 2021-05-14 | 国网北京市电力公司 | Spherical relay coil and wireless power transmission system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638977A (en) * | 2019-01-25 | 2019-04-16 | 南京理工大学 | A kind of solid space multinode power equalization wireless power supply system and method |
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| CN111931299A (en) * | 2020-06-02 | 2020-11-13 | 西安理工大学 | Optimal design method of planar spiral coil in magnetic coupling resonance wireless power transmission application |
| CN111931299B (en) * | 2020-06-02 | 2024-04-16 | 西安理工大学 | Optimal design method of planar spiral coil in magnetic coupling resonance wireless power transmission application |
| CN112803616A (en) * | 2020-12-31 | 2021-05-14 | 国网北京市电力公司 | Spherical relay coil and wireless power transmission system |
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| CN105932786B (en) | 2018-05-15 |
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