CN104104159B - There is the magnetic resonance manifold type multi load wireless charging platform of uniform magnetic field characteristic - Google Patents
There is the magnetic resonance manifold type multi load wireless charging platform of uniform magnetic field characteristic Download PDFInfo
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- CN104104159B CN104104159B CN201410300222.5A CN201410300222A CN104104159B CN 104104159 B CN104104159 B CN 104104159B CN 201410300222 A CN201410300222 A CN 201410300222A CN 104104159 B CN104104159 B CN 104104159B
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Abstract
A kind of magnetic resonance manifold type multi load wireless charging platform with uniform magnetic field characteristic, connects wire, stationary gantry, additional saddle, load end coupled inductor, load end tuning capacity, support including alternating current power supply, source coupled inductor, source tuning capacity, inductance coil array, array tuned electric capacity, array；Alternating current power supply, source coupled inductor, source tuning capacity are connected, inductance coil array and array tuned electric capacity connect by array that wire is in series, load end coupled inductor and load end tuning capacity are connected, and are connected with load circuit by output port；The inductance coil of inductance coil array is wrapped on stationary gantry side, and stationary gantry and support are fixed and support inductance coil array.Present configuration is simple, easily implements, and the coupling coil of load to be charged can the most arbitrarily be placed on any one place in uniform magnetic field region, and does not affect its charging effect, can support that multiple load is charged simultaneously.
Description
Technical field
The invention belongs to wireless energy transfer system design field.
Background technology
As a kind of novel wireless energy transmission technology, magnetic resonance manifold type wireless charging technology can be times over inductance
The distance of necklace bore is with higher efficiency transmission electric energy, and overcoming vicarious wireless charging technology can only be in the nearest distance
The most applicable drawback.Can be used for the various application scenarios from milliwatt level to multikilowatt.
Traditional magnetic resonance manifold type wireless charging system has four inductance coil forms and two inductance coil forms two kinds.?
In four inductance coil forms, power supply is coupled by a coupled inductor and emission inductance coil, and load is then by another
Individual coupled inductor and reception inductance coil are coupled；And in two inductance coil forms, coupled inductor is cancelled, electricity
Source, load are directly connected with emission inductance coil, reception inductance coil.Their common feature is single supply, single load, effect
Rate and power are very sensitive to the distance between inductance coil, relative position.And if being confined to this man-to-man single supply, list
The conventional art of load, the method that simultaneously be charged using multiple charging device to multiple loads.
Have the wireless charging technology of some uniform magnetic fields at present, be characterized in produce in certain space region all
Even magnetic field, in this area of space, load to be charged (and its coupled inductor) can arbitrarily be moved and not affected its charging
Performance.But they are based on magnetic induction principle, uniform magnetic field is generally localized in a certain two dimensional surface of area
On, cause the position of the coupled inductor of load to be limited in the range of the several millimeter of range transmission coil, this is greatly
Limit development further and the application of wireless charging platform.
For overcoming the above-mentioned weakness of magnetic inductive uniform magnetic field wireless charging technology, the magnetic resonance manifold type broken traditions without
Line charging load can only be placed on fixed position and the drawback can only being charged single load, meets the most
The demand of load wireless charging, has bigger three-dimensional uniform magnetic field space in the urgent need to a kind of, it is possible to enter multi load simultaneously
The technical scheme of row charging.The program is also tackled each charging load and is effectively isolated, with avoid between multiple charging load
Interfering during charging.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, propose a kind of magnetic resonance manifold type wireless charging platform, profit
Coaxial uniform magnetic field can be produced in the range of certain three-dimensional spatial area around constituting to identical parallel electric inductance coil with multiple
Inductance coil array.Multiple loads can be charged by this platform simultaneously；The coupled inductor of charging load can be placed
Optional position in the range of this uniform magnetic field；Multi load charging time, as long as the coupled inductor of charging load each other every
Opening certain position just can be mutually isolated, it is ensured that charged state is independent of each other.
The present invention is achieved by the following technical solutions.
The present invention is by alternating current power supply (9), source coupled inductor (3), source tuning capacity (10), inductance coil array
(11), array tuned electric capacity (1), array connect wire (2), stationary gantry (5), additional saddle (12), load end coupling inductance
Coil (4), load end tuning capacity (7), support (6) are constituted.Alternating current power supply (9) and source coupled inductor (3) and source
End tuning capacity (10) is in series by wire, and inductance coil array (11) and array tuned electric capacity (1) are connected by array leads
Line (2) is in series, load end coupled inductor (4) and load end tuning capacity (7) are in series, and by output port (8)
It is connected with load circuit.
Described inductance coil array (11) is by the most parallel two or more heavy caliber air-core inductances
It is in series by wire (2), around to keeping consistent.So, can be bottom, topmost inductance by bottom inductance coil
Obtain near column regions that coil is constituted by the top shape of array inductance coil (the column regions shape of cross section depend on)
Obtain the magnetic field of approaches uniformity.These described inductance coils can be circular, it is possible to around being made as rectangle or other geometry.
These heavy caliber air-core inductances are wrapped on stationary gantry (5) side, stationary gantry (5) be by nonmetal,
The flat rod structure that nonmagnetic substance (such as glass, plastics etc.) is made, fixes together with support (6) and supports inductance coil array.
In each stationary gantry (5), in addition to the stationary gantry near source coupled inductor (3), electrical equipment to be charged can be placed
It is charged on other stationary gantry.It addition, also can be parallel in the space between the stationary gantry of highest and lowest
Some additional saddles (12) are placed in other appropriate location of stationary gantry.
Support (6) is made up of nonmetal, nonmagnetic substance (such as glass, plastics, timber etc.), except fixing and support are fixed
Outside the effect of saddle (5) and inductance coil array (11), it is also possible to support multiple additional saddle (12) and be placed on approaches uniformity magnetic
In field areas.Stationary gantry (5) and additional saddle (12) are arranged in uniform magnetic field space, are perpendicular to inductance coil array (11)
Axially, support (6) support, fix.
The total inductance of inductance coil array is divided into two parts, a part to be the self-inductions of each air core coil, and another part is each
Air core coil mutual inductance each other, total inductance amount LASummation for above two parts inductance.Array tuned electric capacity CA(1) by electricity
The resonance frequency tunings of sense coil array is to operating frequency f0, i.e..Generally, operating frequency f0Can be
125KHz, 133KHz, 225KHz, 13.56MHz equifrequent selects.
Source coupled inductor (3, inductance value LS) be placed on bottom charging platform, but also can be parallel to coil array
It is placed in other position in uniform magnetic field cylindrical region, source tuning capacity (10, CS) for the tuning of source resonance circuit, its
Effect be by resonant frequency also be tuned to operating frequency f0, LSAnd CSMeet resonant relationship。
Load end coupled inductor LLAnd load end tuning capacity CL(7) gone here and there mutually with output port (8) by wire
Connection, general load end coupled inductor LLCan lie on stationary gantry or additional saddle.Load end tuning capacity CL(7) use
In the tuning of load end resonance circuit, its resonant frequency also be tuned to operating frequency f0, LLAnd CLMeet resonant relationship.Equipment to be charged and charging circuit (including rectification, filtering, match circuit) are directly connected to output
Port (8).
Alternating current power supply (9) is that DC source passes through DC-AC or low-frequency ac source (such as 220V50Hz civil power) passes through AC-DC-
AC circuit converts through full-bridge inverting or semi-bridge inversion.So, alternating current power supply (9) can be equivalent to the alternating current of 0 ohmic internal resistance
Potential source.
Designing and producing inductance coil array (11) coil inductance LA, source coupling coil (3) inductance LSWith load end coupling
Close coil inductance LLTime, it is proposed that meet constraints MSA=MAL, to obtain the effect of source coupling.Here, MSAIt is LSWith LAMutual
Sense, MALIt is LAWith LLMutual inductance.
When there being multiple load to charge simultaneously, for avoiding or reducing interfering between charging load, relation should be met
Formula MLmLn<<MSA, MLmLnFor the mutual inductance between m-th load end coupling coil and the n-th load end coupling coil.For reaching this
One purpose, can spatially be spaced apart a certain distance by load end coupling coil.As different high in load being placed on
In the stationary gantry of degree (difference in height is more than 2 times of load coupling coil diameters)；If being placed on same stationary gantry or additional torr
On platform, then the distance of center circle loading coupling coil is at least greater than 2 times of load coupling coil diameters.
The effect of invention: charging platform simple in construction disclosed by the invention, easily implements.The present invention utilizes around to identical
(column regions shape of cross section depends on array electricity in the column regions of sparse parallel electric inductance coil array generation magnetic field approaches uniformity
The geometry of sense coil itself), the coupling coil of load the most to be charged can the most arbitrarily be placed the most any
At one, and do not affect its charging effect.
This wireless charging platform can support that multiple load is charged simultaneously.Mutual inductance between load coupling coil is the least
When the mutual inductance loaded between coupling coil and uniform magnetic field coil array, influencing each other between charging load is negligible.
Accompanying drawing explanation
Fig. 1 is the total system circuit theory diagrams of the present invention.Wherein, 1 is array tuned electric capacity, and 2 connect wire for array,
3 is source coupling coil, and 4 is load end coupling coil, and 5 is stationary gantry, and 6 is support, and 7 is load end tuning capacity, and 8 are
Output port, 9 is power supply, and 10 is source tuning capacity, and 11 is inductance coil array, and 12 is additional saddle.
Fig. 2 is the circuit system schematic diagram of embodiment, and in figure, two loads are reduced to ohmic load RL1And RL2。
Fig. 3 is in embodiment illustrated in fig. 2, the vertical section magnetic line of force scattergram of double flat row inductance coil array, wire in figure
Part represents approaches uniformity field region.
Fig. 4 be voltage source peak-to-peak value be VS=20V, load resistance RL1=8 Ω, load RL2(only to single load during open circuit
RL1Charging), frequency (kHz)-current amplitude (A) curve chart.When frequency is 225.0kHz (operating frequency), I1=2.543A。
Fig. 5 be voltage source peak-to-peak value be VS=20V, loads RL1Open circuit, load resistance RL2(only to single load when being 10 Ω
RL2Charging), frequency (kHz)-current amplitude (A) curve chart.When frequency is 225.0kHz, I2=1.916A。
Fig. 6 be voltage source peak-to-peak value be VS=20V, load resistance RL1=8 Ω, load resistance RL2=10 Ω, load end coupling electricity
(equal to 2 times of load coupling coil diameters) when the distance of center circle of sense coil is 10cm, frequency (kHz)-current amplitude (A) curve chart.
When frequency is 225.0kHz, I1=2.533A, I2=1.906A。
Fig. 7 be voltage source peak-to-peak value be VS=20V, load resistance RL1=8 Ω, load resistance RL2=10 Ω, load end couples
(equal to 1 times of load coupling coil diameter) when the distance of center circle of inductance coil is 5cm, frequency (kHz)-current amplitude (A) curve chart.
When frequency is 225.0kHz, I1=2.062A, I2=1.664A。
Detailed description of the invention
The present invention will be described further by specific embodiment in conjunction with accompanying drawing, but should not be used as the scope of the invention and
The restriction of its application.
Embodiment.Parallel coaxial twin coil array uniform magnetic field charging platform.
This charging platform is as shown in Figure 2.Coil array by 2 at a distance of 15cm, the air core coil string of bore (diameter) 30cm
Connection forms, and each air core coil is formed by enamel covered wire coiling 10 circle of linear diameter 0.8mm.Its total inductance LAIt is 240 μ H, tuning
Electric capacity CA=2.1nF, is tuned on the system operating frequency of f=225KHz.Distribution of Magnetic Field vertical profile around this coil array
Face figure as it is shown on figure 3, as seen from the figure region shown in wire (cylinder) internal magnetic field approaches uniformity distribution.Power supply coupling coil mouth
Footpath (diameter) 10cm, is formed by enamel covered wire coiling 3 circle of linear diameter 0.8mm, and its inductance value is about LS=2.77 μ H, tuning electricity
Hold CS=0.18μF.Load coupling coil specification is identical, and bore (diameter) 5cm, by the enamel covered wire coiling 12 of linear diameter 0.8mm
Circle forms, and its inductance value is about LL=19 μ H, tuning capacity CL=26nF.Load coupling coil is placed on saddle, respectively loads coupling
Distance of center circle between coil should be not less than 10cm.
It is V that Fig. 4-Fig. 7 gives voltage source peak-to-peak valueS=20V, loads 1 resistance RL1=8 Ω, load 2 resistance RL2It is 10 Ω
Time, the simulation curve of frequency (kHz) in varied situations-current amplitude (A).Fig. 4 correspondence only has RL1In the presence of；Fig. 5 is corresponding
Only RL2In the presence of.Current amplitude at mid frequency can use formula VS/RLiEstimation.Such as: at 225kHz, in load 1
Current amplitude should be 20V/8 Ω=2.5A, and the current amplitude in load 2 should be 20V/10 Ω=2A；Obtain with emulation
2.543A and 1.916A is the most identical.Corresponding two loads of Fig. 6 are charged simultaneously, and the distance of center circle of coupling coil is the situation of 10cm,
Current amplitude I1=2.533A, I2=1.906A, compared with during single load charging, reduces by 0.39% and 0.5% the most respectively.Fig. 7 is corresponding
Two loads are charged simultaneously, and the distance of center circle of coupling coil is the situation of 5cm, now current amplitude I1=2.062A、I2=
1.664A, reduces 18.9% and 13.2% respectively with single load charging phase ratio.Visible, when multi load is charged and is placed on same
Time on saddle, if during the distance of center circle >=2 times coil diameter of coupling coil, each load charging independently of one another, it influences each other the least,
The power of load absorption is determined by source voltage and load circuit self equiva lent impedance completely.
Claims (6)
1. there is a magnetic resonance manifold type multi load wireless charging platform for uniform magnetic field characteristic, it is characterized in that by alternating current power supply
(9), source coupled inductor (3), source tuning capacity (10), inductance coil array (11), array tuned electric capacity (1), battle array
Row connect wire (2), stationary gantry (5), additional saddle (12), load end coupled inductor (4), load end tuning capacity
(7), support (6) is constituted；Described inductance coil array (11) is hollow by the most parallel two or more heavy calibers
Inductance coil is in series by wire (2), around to keeping consistent；
Alternating current power supply (9) and source coupled inductor (3) and source tuning capacity (10) are in series by wire, inductor wire
Circle array (11) and array tuned electric capacity (1) by array connection wire (2) be in series, load end coupled inductor (4) and
Load end tuning capacity (7) is in series, and is connected with load circuit by output port (8)；Heavy caliber air-core inductance twines
Being wound on stationary gantry (5) side, stationary gantry (5) is nonmetal, the flat rod structure of nonmagnetic substance, solid together with support (6)
Determine and support inductance coil array (11).
Wireless charging platform the most according to claim 1, is characterized in that described heavy caliber air-core inductance is for circle
Or rectangle.
Wireless charging platform the most according to claim 1, in it is characterized in that the space between stationary gantry (5), places
Some additional saddles (12) being parallel to stationary gantry (5), are supported by support (6) and are fixed.
Wireless charging platform the most according to claim 1, it is characterized in that system operating frequency be 125KHz, 133KHz,
225KHz or 13.56MHz；Array tuned electric capacity (1) by inductance coil array (11) be tuned to operating frequency；Source tuning electricity
Hold (10) by source coupled inductor (3) be tuned to operating frequency；Load end tuning capacity (7) is by load end coupling inductance
Coil (4) be tuned to operating frequency.
Wireless charging platform the most according to claim 1, it is characterized in that alternating current power supply (9) be DC source pass through DC-AC,
Or low-frequency ac source is converted through full-bridge inverting or semi-bridge inversion by AC-DC-AC circuit.
Wireless charging platform the most according to claim 1, is characterized in that inductance coil array (11) coil inductance LA, source
Coupling coil (3) inductance LSWith load end coupling coil inductance LL, meet constraints MSA=MAL, wherein, MSAIt is LSWith LA's
Mutual inductance, MALIt is LAWith LLMutual inductance.
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| CN201410300222.5A CN104104159B (en) | 2014-06-30 | 2014-06-30 | There is the magnetic resonance manifold type multi load wireless charging platform of uniform magnetic field characteristic |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105632680B (en) * | 2016-03-28 | 2017-11-21 | 中国船舶重工集团公司第七一〇研究所 | A kind of implementation method of magnetic coil system |
| CN105958666B (en) * | 2016-06-06 | 2019-10-01 | 南昌大学 | It is a kind of to expand wireless charging electrical pad with multi-load isolation characteristic |
| CN108667154B (en) * | 2018-05-21 | 2024-03-29 | 南昌大学 | Multi-frequency multi-load wireless charging platform with load isolation characteristic |
| CN117097262B (en) * | 2023-10-16 | 2024-01-30 | 苏州博创医疗器械有限公司 | High-frequency resonance applicator |
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| CN103339824A (en) * | 2011-01-28 | 2013-10-02 | 三星电子株式会社 | Apparatus and method for wireless power transmission including a source resonator having a substantially uniform magnetic field |
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