CN110277839A - A kind of salt free ligands controllable electric magnetic field generation method - Google Patents

A kind of salt free ligands controllable electric magnetic field generation method Download PDF

Info

Publication number
CN110277839A
CN110277839A CN201910475781.2A CN201910475781A CN110277839A CN 110277839 A CN110277839 A CN 110277839A CN 201910475781 A CN201910475781 A CN 201910475781A CN 110277839 A CN110277839 A CN 110277839A
Authority
CN
China
Prior art keywords
coil
distribution
drive current
optimum drive
magnetic field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201910475781.2A
Other languages
Chinese (zh)
Other versions
CN110277839B (en
Inventor
代中余
王军华
朱仁勋
黄虹
曲皓玥
周海阔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan University WHU
Original Assignee
Wuhan University WHU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan University WHU filed Critical Wuhan University WHU
Priority to CN201910475781.2A priority Critical patent/CN110277839B/en
Publication of CN110277839A publication Critical patent/CN110277839A/en
Application granted granted Critical
Publication of CN110277839B publication Critical patent/CN110277839B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H04B5/263—
    • H04B5/79—

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

The invention proposes a kind of salt free ligands controllable electric magnetic field generation methods.The present invention calculates optimal exciting coil collection using orthogonal matching pursuit algorithm in selection coil according to the required magnetic distribution model under the waveguide modes provided；The autocorrelation matrix for calculating each coil electromagnetism field distribution calculates the cross-correlation matrix of each coil electromagnetism field distribution and required Distribution of Magnetic Field, solves each coil optimum drive current vector with this；Its corresponding optimum drive current vector is applied to each coil, measurement obtains corresponding voltage vector, the load capacitance of the impedance matrix and each coil between each coil is calculated according to current vector and voltage vector；Calculate the compensating electric capacity for making coil reach resonance；Each coil is put with one heart, configures compensating electric capacity and applies optimum drive current, the i.e. required magnetic distribution of the magnetic distribution generated at this time.The electromagnetic field of generation has the characteristic of salt free ligands, and adjustment and control as needed, and when being used for wireless power transmission, efficiency of transmission is high, strong antijamming capability.

Description

A kind of salt free ligands controllable electric magnetic field generation method
Technical field
The invention belongs to wireless power technical field more particularly to a kind of salt free ligands controllable electric magnetic field generation methods.
Background technique
Studies have shown that when the size of electromagnetic field emissions device is less than the wavelength of the electromagnetic field of its transmitting, device transmitting Electromagnetic field have salt free ligands characteristic.The electromagnetic field of this characteristic good can be used for microwave ablation, wireless power transmission etc. Field, it is anti-dry when can improve the efficiency of transmission of wireless power transmission, and promote transmission when being especially used for wireless power transmission Disturb ability.But up to the present, there are no the salt free ligands electricity that a realistic plan is used to generate this characteristic good Magnetic field.
Summary of the invention
In order to solve the above-mentioned technical problem, the invention proposes a kind of salt free ligands controllable electric magnetic field generation methods.
To achieve the above object, the technical solution adopted by the present invention is that, a kind of salt free ligands controllable electric magnetic field generation method is wrapped Include following steps:
Step 1: providing the required magnetic distribution model under waveguide modes, orthogonal matching pursuit is used in selection coil Algorithm calculates optimal exciting coil collection；
Step 2: calculating the autocorrelation matrix of the function of time of each coil electromagnetism field distribution, calculate each coil electromagnetism field distribution The function of time and each coil needed for Distribution of Magnetic Field the function of time cross-correlation matrix, according to autocorrelation matrix and cross-correlation Each coil optimum drive current vector of Matrix Solving；
Step 3: concentrating each coil to apply its corresponding optimum drive current vector optimal exciting coil, measurement is applied It is added in the voltage vector at coil both ends, according between optimum drive current vector and each coil of the voltage vector at coil both ends calculating Impedance matrix and each coil load capacitance；
Step 4: calculating the compensating electric capacity for making coil reach resonance；
Step 5: putting optimal exciting coil with one heart and concentrate each coil, configure compensating electric capacity and apply optimal drive electricity Stream, the magnetic distribution generated at this time；
Preferably, required magnetic distribution model described in step 1 are as follows:
Rectangular coordinate system in space is established, according to the required electromagnetic field size and spatial distribution provided in advance, establishes wave guide mode Required magnetic distribution model H under typed(x,y,z)；
Using orthogonal matching pursuit algorithm calculating optimal exciting coil collection in selection coil described in step 1, including with Lower step:
Step 1.1: by HdIt is set as residual error He, i.e. He=Hd；
It establishes optimal exciting coil and integrates aggregation model as Sl={ l1,l2,...,ln, original state is empty set
Wherein, liFor i-th of selection coil, i ∈ [1, n], n≤N, n are selection coil number, and N is can selection coil sum；
To all to selection coil, input lead model, coil shape, coil dimension, coil turn, dielectric permeability, Jie Matter relative dielectric constant and driving current frequency, establish it is all under waveguide modes can selection coil ljExternal electromagnetic field distributed mode Type Hj(x, y, z), wherein [1, N] j ∈；
Algorithm stop condition is set:
Number of coils upper limit m, wherein m≤N, limits of error HeMAX, wherein HeMAX≥0；
Step 1.2: each H is calculated by orthogonal matching pursuit algorithmjWith HeMatching degree set Sc={ c1,c2,..., cN-n, the magnetic distribution of wherein highest matching degree is chosen, H is denoted asb, optimal exciting coil collection S is added in its corresponding coill, And according to HbResidual error H is updated using orthogonal matching pursuit algorithme；
Step 1.3: repeating step 1.2, selection coil number reaches the upper limit, i.e. n=m or residual error H untileLess than or equal to most Big allowable error, i.e. He≤HeMAX。
Preferably, the autocorrelation matrix of the function of time of each coil magnetic field distribution of calculating described in step 2 are as follows:
According to the auto-correlation function model of periodic power signal:
According to driving current period, that is, T0, time difference, that is, τ, optimal exciting coil collection S described in step 1lIn each coil magnetic field The function of time H of distributioni(t), each H is calculated by above-mentioned auto-correlation function modeli(t) autocorrelation matrix Rss；
The function of time of Distribution of Magnetic Field needed for the function of time and each coil of each coil magnetic field distribution of calculating described in step 2 Cross-correlation matrix are as follows:
Use cross-correlation function model:
According to driving current period, that is, T0, optimal exciting coil collection S described in time difference, that is, τ, step 1lIn each coil magnetic The function of time H of field distributioni(t) and the function of time H of required Distribution of Magnetic Fieldd(t), each H is calculatedi(t) and Hd(t) cross-correlation Matrix Vsd；
Each coil optimum drive current vector is solved according to autocorrelation matrix and cross-correlation matrix described in step 2 are as follows:
I=[I1 I2 … In]T
Preferably, optimum drive current vector described in step 3 are as follows: I=[I1 I2 … In]T；
IiFor the optimum drive current of i-th of coil, i ∈ [1, n]；
The voltage vector of coil both ends described in step 3 are as follows: V=[V1 V2 … Vn]T
ViFor the voltage at i-th of coil both ends, i ∈ [1, n]；
Impedance matrix Z between each coil of calculating described in step 3 specifically:
Z=VI-1
The load capacitance of each coil of calculating described in step 3 specifically:
Cloadi=1/ (ω0Im(Zii-ZTi))
Wherein, ZTiFor the load impedance of i-th of coil, CloadiFor the load capacitance of i-th of coil, ViFor i-th of coil The voltage at both ends, IiAnd ImThe optimum drive current of respectively i-th and m-th coil, ZimFor the i-th row m of impedance matrix Z column Element, ZiiThe element arranged for the i-th row of impedance matrix Z i-th.
SCload={ Cload1,Cload2,...,CloadnIt is load capacitance vector；
Preferably, calculating the compensating electric capacity for making coil reach resonance described in step 4 are as follows:
Zt=Vi/Ii
Ce=1/ (ω0Im(Zt))
Wherein, ZtFor the equivalent impedance at i-th of coil both ends, CeFor the equivalent capacity at i-th of coil both ends, IiIt is i-th The optimum drive current of coil, ViFor the voltage at i-th of coil both ends, CloadiFor the load capacitance of i-th of coil, CTiIt is i-th The compensating electric capacity of a coil；
SCT={ CT1,CT2,...,CTnIt is compensating electric capacity vector；
Preferably, optimal exciting coil described in step 5 integrates as Sl={ l1,l2,...,ln}；
Compensating electric capacity is configured described in step 5 are as follows:
According to compensating electric capacity vector SCT={ CT1,CT2,...,CTnIt is that each coil configures compensating electric capacity；
Apply optimum drive current described in step 5 are as follows:
According to optimum drive current vector I=[I1 I2 … In]TApply optimum drive current for each coil；
The magnetic distribution generated at this time described in step 5 is magnetic distribution H required described in step 1d(x,y, z)；
The magnetic distribution H of generationd(x, y, z) depends on being applied to the ratio on each coil between optimum drive current, And electromagnetic field intensity depends on the size of optimum drive current, can be realized by the ratio and size for changing optimum drive current Control to magnetic distribution and intensity.
The beneficial effects of the present invention are: the electromagnetic field generated has the good characteristic of salt free ligands, it to be used for wireless power transmission When, there will be efficiency of transmission higher, the transmission characteristics such as anti-interference ability is stronger；And generate electromagnetic field distribution and size all may be used Adjustment and control as needed.
Detailed description of the invention
Fig. 1: flow chart of the method for the present invention；
Fig. 2: orthogonal matching algorithm flow chart of the invention；
Fig. 3: magnet exciting coil of the invention, compensating electric capacity and drive current source connection figure；
Fig. 4: the salt free ligands electromagnetic field generator overall schematic of one embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The specific embodiments of the present invention are described below with reference to the accompanying drawings, and flow chart of the method for the present invention is as shown in Figure 1, for packet Include following steps:
Step 1: providing the required magnetic distribution model under waveguide modes, orthogonal matching pursuit is used in selection coil Algorithm calculates optimal exciting coil collection；
Required magnetic distribution model described in step 1 are as follows:
Rectangular coordinate system in space is established, according to the required electromagnetic field size and spatial distribution provided in advance, establishes wave guide mode Required magnetic distribution model H under typed(x,y,z)；
Described in step 1 in selection coil using orthogonal matching pursuit algorithm calculate optimal exciting coil collection, orthogonal It is as shown in Figure 2 with tracing algorithm flow chart, comprising the following steps:
Step 1.1: by HdIt is set as residual error He, i.e. He=Hd；
It establishes optimal exciting coil and integrates aggregation model as Sl={ l1,l2,...,ln, original state is empty set
Wherein, liFor i-th of selection coil, i ∈ [1, n], n≤N, n are selection coil number, and N is can selection coil sum；
To all to selection coil, input lead model, coil shape, coil dimension, coil turn, medium relative magnetic permeability Rate, medium relative dielectric constant and driving current frequency, establish it is all under waveguide modes can selection coil ljExternal electromagnetic field Distributed model Hj(x, y, z), wherein [1, N] j ∈；
In the present embodiment, wire type used is 0.1 × 400 litz wire, and coil shape is around circle, coil radius is made as 4mm-50mm, coil turn are 1 circle；Medium relative permeability and medium relative dielectric constant take the value in air, i.e. μr= 1, εr=1；Drive current source is high-frequency ac current source, frequency 13.56MHz.In practical applications, according to required electromagnetic field Distribution and of different sizes and driving current frequency difference, may be selected different model conducting wire, the different coil shape of coiling Shape, coil dimension and coil turn, but coil dimension should be less than the wavelength of required electromagnetic field；Medium relative permeability and medium phase Dielectric constant is determined by the medium around coil；Driving current source frequency is chosen according to actual needs.
Algorithm stop condition is set:
Number of coils upper limit m, wherein m≤N, limits of error HeMAX, wherein HeMAX≥0；
Step 1.2: each H is calculated by orthogonal matching pursuit algorithmjWith HeMatching degree set Sc={ c1,c2,..., cN-n, the magnetic distribution of wherein highest matching degree is chosen, H is denoted asb, optimal exciting coil collection S is added in its corresponding coill, And according to HbResidual error H is updated using orthogonal matching pursuit algorithme；
Step 1.3: repeating step 1.2, selection coil number reaches the upper limit, i.e. n=m or residual error H untileLess than or equal to most Big allowable error, i.e. He≤HeMAX。
Step 2: calculating the autocorrelation matrix of the function of time of each coil electromagnetism field distribution, calculate each coil electromagnetism field distribution The function of time and each coil needed for Distribution of Magnetic Field the function of time cross-correlation matrix, according to autocorrelation matrix and cross-correlation Each coil optimum drive current vector of Matrix Solving；
The autocorrelation matrix of the function of time of each coil magnetic field distribution of calculating described in step 2 are as follows:
According to the auto-correlation function model of periodic power signal:
According to driving current period, that is, T0, time difference, that is, τ, optimal exciting coil collection S described in step 1lIn each coil magnetic field The function of time H of distributioni(t), each H is calculated by above-mentioned auto-correlation function modeli(t) autocorrelation matrix Rss；
The driving current period is T in the present embodiment0=0.02s, time difference take τ=0.005s.When practical application, driving electricity The stream period determines that the time difference is chosen as needed by driving current frequency.
The function of time of Distribution of Magnetic Field needed for the function of time and each coil of each coil magnetic field distribution of calculating described in step 2 Cross-correlation matrix are as follows:
Use cross-correlation function model:
According to driving current period, that is, T0, optimal exciting coil collection S described in time difference, that is, τ, step 1lIn each coil magnetic The function of time H of field distributioni(t) and the function of time H of required Distribution of Magnetic Fieldd(t), each H is calculatedi(t) and Hd(t) cross-correlation Matrix Vsd；
Each coil optimum drive current vector is solved according to autocorrelation matrix and cross-correlation matrix described in step 2 are as follows:
I=[I1 I2 … In]T
Step 3: concentrating each coil to apply its corresponding optimum drive current vector optimal exciting coil, measurement is applied It is added in the voltage vector at coil both ends, according between optimum drive current vector and each coil of the voltage vector at coil both ends calculating Impedance matrix and each coil load capacitance；
Optimum drive current vector described in step 3 are as follows: I=[I1 I2 … In]T；
IiFor the optimum drive current of i-th of coil, i ∈ [1, n]；
The voltage vector of coil both ends described in step 3 are as follows: V=[V1 V2 … Vn]T
ViFor the voltage at i-th of coil both ends, i ∈ [1, n]；
Impedance matrix Z between each coil of calculating described in step 3 specifically:
Z=VI-1
The load capacitance of each coil of calculating described in step 3 specifically:
Cloadi=1/ (ω0Im(Zii-ZTi))
Wherein, ZTiFor the load impedance of i-th of coil, CloadiFor the load capacitance of i-th of coil, ViFor i-th of coil The voltage at both ends, IiAnd ImThe optimum drive current of respectively i-th and m-th coil, ZimFor the i-th row m of impedance matrix Z column Element, ZiiThe element arranged for the i-th row of impedance matrix Z i-th.
For load capacitance vector；
Step 4: calculating the compensating electric capacity for making coil reach resonance；
The compensating electric capacity for making coil reach resonance is calculated described in step 4 are as follows:
Zt=Vi/Ii
Ce=1/ (ω0Im(Zt))
Wherein, ZtFor the equivalent impedance at i-th of coil both ends, CeFor the equivalent capacity at i-th of coil both ends, IiIt is i-th The optimum drive current of coil, ViFor the voltage at i-th of coil both ends, CloadiFor the load capacitance of i-th of coil, CTiIt is i-th The compensating electric capacity of a coil；
For compensating electric capacity vector；
Step 5: putting optimal exciting coil with one heart and concentrate each coil, configure compensating electric capacity and apply optimal drive electricity Stream, the magnetic distribution generated at this time；
The connection figure of magnet exciting coil, compensating electric capacity and drive current source as shown in figure 3, the present embodiment salt free ligands electromagnetic field Generating device overall schematic is as shown in Figure 4.
Optimal exciting coil described in step 5 integrates as Sl={ l1,l2,...,ln}；
Compensating electric capacity is configured described in step 5 are as follows:
According to compensating electric capacity vectorCompensating electric capacity is configured for each coil；
Apply optimum drive current described in step 5 are as follows:
According to optimum drive current vector I=[I1 I2 … In]TApply optimum drive current for each coil；
The magnetic distribution generated at this time described in step 5 is magnetic distribution H required described in step 1d(x,y, z)；
The magnetic distribution H of generationd(x, y, z) depends on being applied to the ratio on each coil between optimum drive current, And electromagnetic field intensity depends on the size of optimum drive current, can be realized by the ratio and size for changing optimum drive current Control to magnetic distribution and intensity.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
It should be understood that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this The limitation of invention patent protection range, those skilled in the art under the inspiration of the present invention, are not departing from power of the present invention Benefit requires to make replacement or deformation under protected ambit, fall within the scope of protection of the present invention, this hair It is bright range is claimed to be determined by the appended claims.

Claims (6)

1. a kind of salt free ligands controllable electric magnetic field generation method, which comprises the following steps:
Step 1: providing the required magnetic distribution model under waveguide modes, orthogonal matching pursuit algorithm is used in selection coil Calculate optimal exciting coil collection；
Step 2: calculate the autocorrelation matrix of the function of time of each coil electromagnetism field distribution, calculate each coil electromagnetism field distribution when Between Distribution of Magnetic Field needed for function and each coil the function of time cross-correlation matrix, according to autocorrelation matrix and cross-correlation matrix Solve each coil optimum drive current vector；
Step 3: concentrating each coil to apply its corresponding optimum drive current vector optimal exciting coil, measurement is applied to The voltage vector at coil both ends calculates the resistance between each coil according to the voltage vector of optimum drive current vector and coil both ends The load capacitance of anti-matrix and each coil；
Step 4: calculating the compensating electric capacity for making coil reach resonance；
Step 5: optimal exciting coil is put with one heart and concentrates each coil, is configured compensating electric capacity and is applied optimum drive current, The magnetic distribution generated at this time.
2. salt free ligands controllable electric according to claim 1 magnetic field generation method, which is characterized in that required described in step 1 Magnetic distribution model are as follows:
Rectangular coordinate system in space is established, according to the required electromagnetic field size and spatial distribution provided in advance, is established under waveguide modes Required magnetic distribution model Hd(x,y,z)；
Optimal exciting coil collection, including following step are calculated using orthogonal matching pursuit algorithm in selection coil described in step 1 It is rapid:
Step 1.1: by HdIt is set as residual error He, i.e. He=Hd；
It establishes optimal exciting coil and integrates aggregation model as Sl={ l1,l2,...,ln, original state is empty set
Wherein, liFor i-th of selection coil, i ∈ [1, n], n≤N, n are selection coil number, and N is can selection coil sum；
To all to selection coil, input lead model, coil shape, coil dimension, coil turn, dielectric permeability, medium phase To dielectric constant and driving current frequency, establish it is all under waveguide modes can selection coil ljExternal electromagnetic field distributed model Hj (x, y, z), wherein [1, N] j ∈；
Algorithm stop condition is set:
Number of coils upper limit m, wherein m≤N, limits of error HeMAX, wherein HeMAX≥0；
Step 1.2: each H is calculated by orthogonal matching pursuit algorithmjWith HeMatching degree set Sc={ c1,c2,...,cN-n, choosing The magnetic distribution for taking wherein highest matching degree, is denoted as Hb, optimal exciting coil collection S is added in its corresponding coill, and according to HbResidual error H is updated using orthogonal matching pursuit algorithme；
Step 1.3: repeating step 1.2, selection coil number reaches the upper limit, i.e. n=m or residual error H untileLess than or equal to maximum allowable Error, i.e. He≤HeMAX。
3. salt free ligands controllable electric according to claim 1 magnetic field generation method, which is characterized in that calculated described in step 2 The autocorrelation matrix of the function of time of each coil magnetic field distribution are as follows:
According to the auto-correlation function model of periodic power signal:
According to driving current period, that is, T0, time difference, that is, τ, optimal exciting coil collection S described in step 1lIn the distribution of each coil magnetic field Function of time Hi(t), each H is calculated by above-mentioned auto-correlation function modeli(t) autocorrelation matrix Rss；
The function of time of each coil magnetic field distribution of calculating described in step 2 is mutual with the function of time of Distribution of Magnetic Field needed for each coil Correlation matrix are as follows:
Use cross-correlation function model:
According to driving current period, that is, T0, optimal exciting coil collection S described in time difference, that is, τ, step 1lIn each coil magnetic field point The function of time H of clothi(t) and the function of time H of required Distribution of Magnetic Fieldd(t), each H is calculatedi(t) and Hd(t) cross-correlation matrix Vsd；
Each coil optimum drive current vector is solved according to autocorrelation matrix and cross-correlation matrix described in step 2 are as follows:
I=[I1 I2…In]T。
4. salt free ligands controllable electric according to claim 1 magnetic field generation method, which is characterized in that best described in step 3 Driving current vector are as follows: I=[I1 I2…In]T；
IiFor the optimum drive current of i-th of coil, i ∈ [1, n]；
The voltage vector of coil both ends described in step 3 are as follows: V=[V1 V2…Vn]T
ViFor the voltage at i-th of coil both ends, i ∈ [1, n]；
Impedance matrix Z between each coil of calculating described in step 3 specifically:
Z=VI-1
The load capacitance of each coil of calculating described in step 3 specifically:
Cloadi=1/ (ω0 Im(Zii-ZTi))
Wherein, ZTiFor the load impedance of i-th of coil, CloadiFor the load capacitance of i-th of coil, ViFor i-th of coil both ends Voltage, IiAnd ImThe optimum drive current of respectively i-th and m-th coil, ZimFor the member of the i-th row m of impedance matrix Z column Element, ZiiThe element arranged for the i-th row of impedance matrix Z i-th；
For load capacitance vector.
5. salt free ligands controllable electric according to claim 1 magnetic field generation method, which is characterized in that calculated described in step 4 Coil is set to reach the compensating electric capacity of resonance are as follows:
Zt=Vi/Ii
Ce=1/ (ω0 Im(Zt))
Wherein, ZtFor the equivalent impedance at i-th of coil both ends, CeFor the equivalent capacity at i-th of coil both ends, IiFor i-th of coil Optimum drive current, ViFor the voltage at i-th of coil both ends, CloadiFor the load capacitance of i-th of coil, CTiFor i-th of line The compensating electric capacity of circle；
For compensating electric capacity vector.
6. salt free ligands controllable electric according to claim 1 magnetic field generation method, which is characterized in that optimal described in step 5 Magnet exciting coil integrates as Sl={ l1,l2,...,ln}；
Compensating electric capacity is configured described in step 5 are as follows:
According to compensating electric capacity vectorCompensating electric capacity is configured for each coil；
Apply optimum drive current described in step 5 are as follows:
According to optimum drive current vector I=[I1 I2…In]TApply optimum drive current for each coil；
The magnetic distribution generated at this time described in step 5 is magnetic distribution H required described in step 1d(x,y,z)；
The magnetic distribution H of generationd(x, y, z) depends on being applied to ratio on each coil between optimum drive current, and electromagnetism Field intensity depends on the size of optimum drive current, can be realized by the ratio and size for changing optimum drive current to electromagnetism The control of field distribution and intensity.
CN201910475781.2A 2019-06-03 2019-06-03 Diffraction-free controllable electromagnetic field generation method Active CN110277839B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910475781.2A CN110277839B (en) 2019-06-03 2019-06-03 Diffraction-free controllable electromagnetic field generation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910475781.2A CN110277839B (en) 2019-06-03 2019-06-03 Diffraction-free controllable electromagnetic field generation method

Publications (2)

Publication Number Publication Date
CN110277839A true CN110277839A (en) 2019-09-24
CN110277839B CN110277839B (en) 2023-01-03

Family

ID=67960425

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910475781.2A Active CN110277839B (en) 2019-06-03 2019-06-03 Diffraction-free controllable electromagnetic field generation method

Country Status (1)

Country Link
CN (1) CN110277839B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103208866A (en) * 2013-04-23 2013-07-17 中国科学院电工研究所 Method for designing wireless power transmission device
CN109361271A (en) * 2018-09-28 2019-02-19 河南师范大学 A kind of enhanced electronic product wireless charging device and its design method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103208866A (en) * 2013-04-23 2013-07-17 中国科学院电工研究所 Method for designing wireless power transmission device
CN109361271A (en) * 2018-09-28 2019-02-19 河南师范大学 A kind of enhanced electronic product wireless charging device and its design method

Also Published As

Publication number Publication date
CN110277839B (en) 2023-01-03

Similar Documents

Publication Publication Date Title
US10637303B2 (en) Magnetic power transmission utilizing phased transmitter coil arrays and phased receiver coil arrays
Nguyen et al. Multiple-inputs and multiple-outputs wireless power combining and delivering systems
Barman et al. Wireless powering by magnetic resonant coupling: Recent trends in wireless power transfer system and its applications
EP2889959B1 (en) Electricity transmission sending method and device, and system
CN105706334B (en) Wireless power transmission apparatus, wireless power reception device and loop construction
CN107508389B (en) Omnidirectional wireless power transmission system and optimization control method thereof
CN106849372B (en) ECPT system and its Parameters design based on bilateral F-LCLC resonant network
CN106981933A (en) Radio energy transmission system and based on apart from adaptive driving coil collocation method
CN103199634B (en) The phased capacitance tuning device of magnet coupled resonant type wireless delivery of electrical energy
KR20120011956A (en) Wireless power transmitter, wireless power receiver, and method for wireless power transfer using them
JP2019513342A (en) System and method for wireless power transfer
CN106797145A (en) While multifrequency receiving circuit
CN107302846A (en) Induced power transmitter
CN108400657A (en) A kind of omnibearing selective radio energy transmission system
Seshadri et al. Effect of coil structures on performance of a four-coil WPT powered medical implantable devices
WO2014018972A1 (en) Computer modeling for resonant power transfer systems
CN106330141A (en) Schumann resonance generating device
KR101222137B1 (en) Directional wireless power transmission apparatus using magnetic resonance induction
Yamaguchi et al. Resonance and efficiency in wireless power transfer system
Moshfegh et al. Conditions of maximum efficiency for wireless power transfer between two helical wires
CN110277839A (en) A kind of salt free ligands controllable electric magnetic field generation method
CN108695992B (en) Real-time maximum power transmission method of three-dimensional wireless electric energy transmission system
CN206834851U (en) A kind of radio energy transmission system
CN106130091A (en) A kind of micro radio charger and method of work thereof
CN209343917U (en) A kind of Wireless charging coil

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant