CN106849373A - A kind of wireless charging device - Google Patents
A kind of wireless charging device Download PDFInfo
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- CN106849373A CN106849373A CN201611233008.8A CN201611233008A CN106849373A CN 106849373 A CN106849373 A CN 106849373A CN 201611233008 A CN201611233008 A CN 201611233008A CN 106849373 A CN106849373 A CN 106849373A
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Abstract
The invention discloses a kind of wireless charging device, the charging equipment includes power supply circuit；At least two parallel to each other and arranged in co-axial alignment Helmholtz coils, the respectively coupling power supply circuit, first coil and the second coil, have uniform magnetic field between the first coil and second coil after energization；The first coil and second coil are circular coil, and the number of turn of the first coil with second coil, radius all same, the spacing between the first coil and second coil are identical with the radius；The first coil and second coil are square coil, the number of turn of the first coil with second coil, coil length of side all same, and the spacing between the first coil and second coil is 0.5445 times of the length of side.Through the above way, the present invention can improve stability of the wireless energy transfer in certain space region.
Description
Technical field
The present invention relates to wireless charging field, more particularly to a kind of wireless charging device.
Background technology
Wireless charging device has gradually initially entered the every aspect of people's daily life, particularly restricted battery technology
Development, the production and life that the appearance of wireless charging gives people brings earth-shaking change.Current some wireless chargings set
It is standby that using a kind of wireless charging platform based on induction type coupling, its shortcoming is that receiving coil can not be separated with transmitting coil,
Energy transmission range is shorter.Also some wireless charging devices use antiparallel coil to overcome because distance change causes efficiency of transmission
The problem of reduction, but the loop construction must be receiving coil and the coaxial situation of transmitting coil, the space region of energy stabilization transmission
Domain scope is smaller.
The content of the invention
The present invention solves the technical problem of a kind of wireless charging device of offer, it is possible to increase energy stabilization transmission
Regional extent.
In order to solve the above technical problems, one aspect of the present invention is：A kind of wireless charging device is provided, is wrapped
Include：Power supply circuit；At least two parallel to each other and arranged in co-axial alignment Helmholtz coils, couple the power supply circuit, respectively
First coil and the second coil, have uniform magnetic field between the first coil and second coil after energization.
Wherein, the first coil and second coil are circular coil, the first coil and second coil
The number of turn, coil radius all same, the spacing between the first coil and second coil is identical with the coil radius.
Wherein, the first coil and second coil are square coil, the first coil and second coil
The number of turn, coil length of side all same, the spacing between the first coil and second coil is the coil length of side
0.5445 times.
Wherein, repeating coil is further included, the repeating coil is located at the First Line of the Helmholtz coil
Circle and second coil in the middle of, after energization between the first coil and the repeating coil and the repeating coil with
Uniform magnetic field is respectively provided between second coil.
Wherein, upper and lower and parallel interval is set the first housing and the second housing, positioned at second housing of lower
, to be electrically charged equipment placement region, the first coil, second coil are located at the first shell respectively for upper surface or top
At body, second housing；Or the first housing and the second housing that vertical and parallel interval is set, placement quilt is provided between the two
Standing groove/the fixed mount of charging equipment, the first coil, second coil are located at first housing, described the respectively
At two housings.
Wherein, the power supply circuit includes resonance circuit, and the resonance circuit is used to provide with the first resonant frequency
Alternating current is to the Helmholtz coil.
Wherein, the equipment that is electrically charged is included or coupling loading coil, and the loading coil is located at the uniform magnetic field
In region, the loading coil induces induced-current and is electrically charged equipment to described, and then carries out nothing to the equipment that is electrically charged
Line charges.
Wherein, the Helmholtz coil has the first own resonant frequency, and the loading coil is own humorous with second
Vibration frequency；What the described first own resonant frequency, the described second own resonant frequency and the power supply circuit were exported described exchanges
First resonant frequency of electricity is identical.
The beneficial effects of the invention are as follows：It is different from the situation of prior art, wireless charging device bag provided by the present invention
At least two parallel to each other and arranged in co-axial alignment Helmholtz coils are included, there is uniform magnetic field region in the middle of above-mentioned Helmholtz coil
Domain, when loading coil in uniform magnetic field move by optional position, its receiving power can tend towards stability, and then can improve
Stability of the wireless energy transfer in certain space region.
Brief description of the drawings
Fig. 1 is the structural representation of the implementation method of wireless charging device of the present invention；
Fig. 2 is the structural representation of the implementation method of Helmholtz coil one in Fig. 1；
Fig. 3 is the structural representation of another implementation method of Helmholtz coil in Fig. 1；
Fig. 4 is the structural representation of Helmholtz coil a further embodiment in Fig. 1；
Fig. 5 is the structural representation of the another implementation method of wireless charging device of the present invention；
Fig. 6 is the structural representation of Helmholtz coil model；
Fig. 7 is the effect diagram that simulation analysis verify Helmholtz coil model；
Fig. 8 is the change curve of loading coil each point magnitude of voltage when moving radially；
Fig. 9 is the change curve of each point magnitude of voltage when loading coil is moved axially.
Specific embodiment
Fig. 1 is referred to, Fig. 1 is the structural representation of the implementation method of wireless charging device of the present invention, and the wireless charging sets
It is standby to include：
Power supply circuit 10；Specifically, power supply circuit 10 includes resonance circuit 100, and resonance circuit 100 is used to provide has the
The alternating current of one resonant frequency is to Helmholtz coil 12.In a practical application scene, power supply circuit 10 also includes rectification
Filtering sub-circuit (not shown), the rectified filtering sub-circuit of electric main (220V) is changed into DC supply input to resonance circuit 100,
Resonance circuit 100 is by alternating current that DC inverter is the first resonant frequency to Helmholtz coil 12.
At least two Helmholtz coils 12 parallel to each other and arranged in co-axial alignment, couple power supply circuit 10, respectively first
The coil 121 of coil 120 and second, has uniform magnetic field between the coil 121 of first coil 120 and second after energization；Specifically
Ground, in an application scenarios, incorporated by reference to Fig. 2, Fig. 2 is the structural representation of the implementation method of Helmholtz coil one in Fig. 1.The
One coil 201 and the second coil 202 are circular coil, and the number of turn of first coil 201 and the second coil 202, coil radius are homogeneous
Together, the spacing between the coil 202 of first coil 201 and second is identical with coil radius；In addition in the present embodiment, first coil
201 and second coil 202 to be connected in series mode, the sense of current that its coil inside passes through is identical, as shown by the arrows in Figure 2.
In another application scenarios, incorporated by reference to Fig. 3, Fig. 3 is the structural representation of another implementation method of Helmholtz coil in Fig. 1.
The coil 302 of first coil 301 and second is square coil, and the number of turn of first coil 301 and the second coil 302, the coil length of side are equal
Identical, the spacing between the coil 302 of first coil 301 and second is 0.5445 times of the coil length of side.In addition in the present embodiment,
The coil 302 of first coil 301 and second is to be connected in series mode, and the sense of current that its coil inside passes through is identical, arrow in such as Fig. 3
Shown in head.
In other application scene, Fig. 4 is referred to, Fig. 4 is that the structure of Helmholtz coil a further embodiment in Fig. 1 is shown
It is intended to.Helmholtz coil further includes repeating coil 403/406, and repeating coil 403/406 is located at Helmholtz coil
In the middle of the coil 402/405 of first coil 401/404 and second, after energization first coil 401/404 and repeating coil 403/406 it
Between and and the coil 402/405 of repeating coil 403/406 and second between be respectively provided with uniform magnetic field.Work as first coil
401st, when the second coil 402, repeating coil 403 are circular coil, first coil 401, second coil 402, repeating coil 403
Spacing, the second coil 402 and repeating coil 403 between the number of turn, radius all same, and first coil 401 and repeating coil 403
Between spacing it is identical with coil radius；When first coil 404, the second coil 405, repeating coil 406 are square coil,
First coil 404, the second coil 405, the number of turn of repeating coil 406, radius all same, and first coil 404 and repeating coil
Spacing between 406, the spacing between the second coil 405 and repeating coil 406 are 0.5445 times of the length of side.Need explanation
It is that the number of repeating coil can be selected according to actual conditions, the present invention is not limited this.
Fig. 5 is referred to, Fig. 5 is the structural representation of the another implementation method of charging equipment of the present invention.The charging equipment is also wrapped
The first housing 501 and the second housing 502 that upper and lower and parallel interval is set are included, positioned at the upper surface of the second housing 502 of lower
Or top, to be electrically charged the placement region of equipment 503, first coil (not shown), the second coil (not shown) are located at first shell respectively
At body 501, the second housing 502；It should be noted that be electrically charged equipment 503 can be placed on the surface of the second housing 502,
The optional position between the first housing 501 and the second housing 502 can be placed on using fixing device.In another application scenarios
In, please continue to refer to Fig. 5, the first housing 504 and the second housing 505 are vertically and parallel interval is set, and placement is provided between the two
Standing groove/the fixed mount 507 of equipment 506 is electrically charged, first coil (not shown), the second coil (not shown) are located at first respectively
At housing 504, the second housing 505；Above-mentioned standing groove/fixed mount 507 can be a platform, and one is electrically charged equipment supporter
Deng, as long as can realize that will be electrically charged the position of equipment 506 is fixed between first coil and the second coil.Need explanation
It is that any is, the material of the first housing 501/504 and the second housing 502/505 can be any insulation material in above-mentioned two embodiment
Material；Need explanation on the other hand, the above-mentioned equipment 503/506 that is electrically charged is included or coupling loading coil, and loading coil is located at
In uniform magnetic field, loading coil induces induced-current to the equipment that is electrically charged 503/506, and then to being electrically charged equipment 503/
506 carry out wireless charging；When above-mentioned charging equipment 503/506 couples loading coil, the position with charging equipment 503/506
Can be overseas in uniform magnetic field region.
To make wireless radio transmission efficiency highest, Helmholtz coil has the first own resonant frequency, and loading coil has
Second own resonant frequency；Can be by way of being respectively coupled to electric capacity or inductance, so that the first own resonant frequency, second are certainly
There is resonant frequency identical with the first resonant frequency of the alternating current that power supply circuit is exported.
In order to verify feasibility of the invention, will be described in detail by Numerical Simulation Analysis below.For convenience of calculating, originally
Helmholtz coil uses circular coil in embodiment.The basic parameter of system is：Power supply VS10V sinusoidal acs are taken, is exported
Impedance RS=50 Ω, resonant frequencyThe number of turn n of Helmholtz coil1=5, loading coil n2=
5, Helmholtz coil radius r1=16cm, loading coil radius r2=3.3cm, wire radius a=0.075cm.Helmholtz's line
Circle electric capacity C1=19.5pF, loading coil electric capacity C2=127.6pF.The internal resistance of Helmholtz coil is by radiation resistanceAnd Ohmic resistanceConstitute, then the internal resistance of Helmholtz coil is RT=2 (Rabs+
Rr)+RS=52 Ω, loading coil equally has internal resistance R3=Rabs′+RrThe Ω of '=0.5, load resistance RL=50 Ω；Helmholtz's line
The resonant frequency of circle and loading coil is identical with the exchange electrical resonance frequency that power supply is exported.
According to said system parameter, model as shown in Figure 6 is set up, the y-axis of the model is the center and two of loading coil
The radial distance of individual Helmholtz coil central point O points, center and two Helmholtz coil central points of the x-axis for loading coil
The axial distance of O points.Numerical Simulation Analysis loading coil receiving terminal load electricity when diverse location is moved is carried out to above-mentioned model
The size of stream, and then draw simulation result schematic diagram as shown in Figure 7.It can be seen that when loading coil is entirely located in the last of the twelve Earthly Branches
When being moved in the cylinder uniform magnetic field that Mu Huozi coils are surrounded into, receive the upper electric current of load and tend towards stability；And when load
When the moving range of coil is more than the cylinder uniform magnetic field that Helmholtz coil is surrounded into, load end electric current is received steep
Drop.
In order to further verify feasibility of the invention, will be further illustrated by specific experiment checking below.At this
In embodiment, power supply is signal generator (model：EEI640C) output 10sin (ω0T) sinusoidal ac, output impedance is RS
=50 Ω.Receiving terminal load is external RLThe resistance of=50 Ω, using dual channel oscilloscope (model：GDS-2202) measurement load
Terminal voltage, remaining parameters are consistent with above-mentioned simulating, verifying.Model is set up and refers to Fig. 6, in order to significantly more efficient analysis is negative
The stability that power is moved in Helmholtz coil zone line is carried, measurement loading coil is when radial and axial mobile respectively
The voltage at load two ends is received, and is contrasted.The center of loading coil is placed at central point O points first, due to whole system
System have symmetry, by loading coil first quartile movement as a example by illustrate, its voltage tester result as shown in table 1 below, table 2,
Table 1 is each point magnitude of voltage when loading coil is moved radially in first quartile, and table 2 is axially moved for loading coil in first quartile
Each point magnitude of voltage when dynamic, wherein, in the distance that x is moved axially for loading coil, i.e. loading coil center and Helmholtz coil
Axial distance between heart point O points；In the distance that y is moved radially for loading coil, i.e. loading coil center and Helmholtz coil
Radial distance between heart point O points.
Each point magnitude of voltage (the unit when loading coil of table 1 is moved radially in first quartile：V)
For the change for finding out loading coil each point magnitude of voltage when moving radially for becoming apparent from, Fig. 8, Fig. 8 are referred to
It is the change curve of the loading coil each point magnitude of voltage when moving radially made according to upper table 1.As shown in Figure 8, load is worked as
Radial distance y between the coil center of circle and O points<During 4cm, the load voltage on loading coil tends towards stability, i.e. now load line
The area of space for being all within cylinder scope uniform magnetic field of circle；As radial distance y>Under voltage during 4cm on loading coil
Drop quickly, i.e., when loading coil be located at Helmholtz coil around cylinder uniform magnetic field outside when its voltage it is no longer steady
It is fixed.
Each point magnitude of voltage (the unit when loading coil of table 2 is moved axially in first quartile：V)
The change of each point magnitude of voltage, refers to Fig. 9, Fig. 9 when for finding out of becoming apparent from, loading coil is moved axially
It is the change curve of each point magnitude of voltage when the loading coil made according to upper table 2 is moved axially.Can by Fig. 8 and Fig. 9 contrasts
Know, voltage tends towards stability when Helmholtz coil can cause that loading coil is moved in the axial direction, and exceeds in the axial direction
Its Helmholtz coil around space cylinder uniform magnetic field certain area in, load-receipt power still can keep steady
It is fixed.
In sum, the situation of prior art is different from, wireless charging device provided by the present invention includes at least two
Parallel to each other and arranged in co-axial alignment Helmholtz coil, has uniform magnetic field in the middle of above-mentioned Helmholtz coil, work as load
Coil is when optional position is moved in uniform magnetic field, its receiving power stabilization, and then can improve wireless energy transfer and exist
The stability in certain space region.
Embodiments of the present invention are these are only, the scope of the claims of the invention is not thereby limited, it is every using the present invention
Equivalent structure or equivalent flow conversion that specification and accompanying drawing content are made, or directly or indirectly it is used in other related technologies
Field, is included within the scope of the present invention.
Claims (8)
1. a kind of wireless charging device, it is characterised in that including：
Power supply circuit；
At least two parallel to each other and arranged in co-axial alignment Helmholtz coils, couple the power supply circuit, respectively first coil
With the second coil, there is uniform magnetic field after energization between the first coil and second coil.
2. equipment according to claim 1, it is characterised in that：
The first coil and second coil are circular coil, the number of turn, the line of the first coil and second coil
Circle radius all same, the spacing between the first coil and second coil is identical with the coil radius.
3. equipment according to claim 1, it is characterised in that：
The first coil and second coil are square coil, the number of turn, the line of the first coil and second coil
Circle length of side all same, the spacing between the first coil and second coil is 0.5445 times of the coil length of side.
4. equipment according to claim 1, it is characterised in that further include repeating coil,
The repeating coil is located in the middle of the first coil of the Helmholtz coil and second coil, institute after energization
State between first coil and the repeating coil and the repeating coil and second coil between be respectively provided with uniform magnetic field
Region.
5. the equipment according to any one of Claims 1-4, it is characterised in that including:
Up and down and parallel interval set the first housing and the second housing, positioned at lower second housing upper surface or on
To be electrically charged equipment placement region, the first coil, second coil are located at first housing, described second respectively for side
At housing；Or
The first housing and the second housing that vertical and parallel interval is set, are provided with the standing groove for placing the equipment that is electrically charged between the two
Or fixed mount, the first coil, second coil are located at first housing, second housing respectively.
6. equipment according to claim 1, it is characterised in that
The power supply circuit includes resonance circuit, and the resonance circuit is used to provide the alternating current with the first resonant frequency to institute
State Helmholtz coil.
7. equipment according to claim 5, it is characterised in that
The equipment that is electrically charged is included or coupling loading coil, and the loading coil is located in the uniform magnetic field, institute
State loading coil and induce induced-current and be electrically charged equipment to described, and then wireless charging is carried out to the equipment that is electrically charged.
8. the equipment according to claim any one of 6-7, it is characterised in that
The Helmholtz coil has the first own resonant frequency, and the loading coil has the second own resonant frequency；Institute
State described the of the first own resonant frequency, the described second own resonant frequency and the alternating current that the power supply circuit is exported
One resonant frequency is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611233008.8A CN106849373A (en) | 2016-12-28 | 2016-12-28 | A kind of wireless charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611233008.8A CN106849373A (en) | 2016-12-28 | 2016-12-28 | A kind of wireless charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106849373A true CN106849373A (en) | 2017-06-13 |
Family
ID=59115134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611233008.8A Withdrawn CN106849373A (en) | 2016-12-28 | 2016-12-28 | A kind of wireless charging device |
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| CN (1) | CN106849373A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380521A (en) * | 2019-07-02 | 2019-10-25 | 上海交通大学 | Three-winding wireless energy supply system for gastrointestinal tract microrobot |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217168A (en) * | 2008-11-17 | 2011-10-12 | 奥林巴斯株式会社 | Wireless power feeder, power transmission coil unit, and wireless power feeder system |
| CN103280897A (en) * | 2013-05-21 | 2013-09-04 | 东南大学 | Uniform-power wireless power unit |
| CN203813469U (en) * | 2014-03-13 | 2014-09-03 | 深圳市金溢科技股份有限公司 | Wireless charging device used for charging in batch and wireless charging coil thereof |
-
2016
- 2016-12-28 CN CN201611233008.8A patent/CN106849373A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217168A (en) * | 2008-11-17 | 2011-10-12 | 奥林巴斯株式会社 | Wireless power feeder, power transmission coil unit, and wireless power feeder system |
| CN103280897A (en) * | 2013-05-21 | 2013-09-04 | 东南大学 | Uniform-power wireless power unit |
| CN203813469U (en) * | 2014-03-13 | 2014-09-03 | 深圳市金溢科技股份有限公司 | Wireless charging device used for charging in batch and wireless charging coil thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴敏超: "磁谐振耦合式均匀磁场特性的无线能量传输结构研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380521A (en) * | 2019-07-02 | 2019-10-25 | 上海交通大学 | Three-winding wireless energy supply system for gastrointestinal tract microrobot |
| CN110380521B (en) * | 2019-07-02 | 2023-03-14 | 上海交通大学 | Three-coil wireless energy supply system for gastrointestinal tract micro-robot |
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Application publication date: 20170613 |
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