CN103915916A - Magnetic resonance wireless electric energy transmitting device based on planar magnetic resonant coupling coil structure - Google Patents
Magnetic resonance wireless electric energy transmitting device based on planar magnetic resonant coupling coil structure Download PDFInfo
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- CN103915916A CN103915916A CN201410166325.7A CN201410166325A CN103915916A CN 103915916 A CN103915916 A CN 103915916A CN 201410166325 A CN201410166325 A CN 201410166325A CN 103915916 A CN103915916 A CN 103915916A
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- coil
- electromagentic resonance
- magnetic resonance
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Abstract
The invention relates to a magnetic resonance wireless electric energy transmitting device, in particular to a magnetic resonance wireless electric energy transmitting device based on a planar magnetic resonant coupling coil structure. The magnetic resonance wireless electric energy transmitting device comprises an input source provided with the output end, a high-frequency resonance power source provided with the input end and the output end and a high-frequency resonance rectifying circuit. Compared with the prior art, a power source coil and an electromagnetic resonance emitting coil are wound mutually to form a plane structure coil, an electromagnetic resonance receiving coil and a load coil are wound mutually to form a plane structure coil, space occupancy is lowered, resonance frequency is reduced, and energy transmitting efficiency is improved.
Description
Technical field
The present invention relates to a kind of magnetic resonance wireless electric energy transmission device, relate in particular to a kind of magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure.
Background technology
Wireless power transmission technology claims again contactless electric energy transmission technology, as far back as 1890, is proposed by Serbia descendants' famous American Electrical Engineer, physicist Ni Gula tesla.Wireless power transmission technology is to utilize electromagnetic wave induction principle and relevant alternating current impression technology, carry out delivery of electrical energy at sending and receiving end by the AC signal that corresponding coil carrys out sending and receiving generation induction, according to the difference of delivery of electrical energy principle, wireless power transmission can be divided into: induction, electromagentic resonance formula and electromagnetic radiation formula.
International wireless charging alliance issues Qi standard to wireless charging alliance, and this Qi standard is that professional etiquette model has been carried out in production and the manufacture to portable terminal charging device, and what portable terminal charging device was applied is exactly induction wireless power transmission principle energising.Invent a kind of novel radio charger by a company of Britain at first, it looks just as a plastics mouse pad, and this " mouse pad " inner is equipped with intensive small coil array, can produce magnetic field, Energy Transfer is given to the electronic equipment that special receiving coil is housed, charged.Utilize noncontact " electromagnetic induction " to carry out wireless power transmission technology and can be subject to a lot of restrictions.Such as the position of Transformer Winding, the width of air gap, can decay fast along with the increase of distance magnetic field.If increase delivery of electrical energy distance, can only strengthen the intensity in magnetic field.But the too large one side of magnetic field intensity can increase the consumption of electric energy, near may causing on the other hand, carry out the equipment failure of recorded information with magnetic signal.So its effective propagation path only has several centimetres, so this wireless power transmission is only suitable for short distance delivery of electrical energy.
Electromagentic resonance formula wireless transmission principles is to be proposed by the researcher of the Massachusetts Institute of Technology.The induction transmission using from Qi standard is different, electromagentic resonance formula is transmitted not outwards emitting electromagnetic wave, and just form around a radiationless magnetic field, intensity is similar with earth magnetic field intensity, can not produce harmful effect to human body and surrounding devices, its effective propagation path is tens centimetres to several meters, but the structure of existing electromagentic resonance transmitting coil and electromagentic resonance receiving coil all adopts spatially spiral structure, adopt this kind of structure to make resonance frequency higher, volume exclusion is large, and delivery of electrical energy efficiency is low.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect of existing electromagentic resonance coil space helical structure technology, provides a kind of magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure, comprises
---input power, there is an output,
---high-frequency resonant power supply, has an input and an output;
---high-frequency resonant rectification circuit;
Described input power connects one end of AC power load, and the other end of described AC power load connects described high-frequency resonant power input;
Also comprise power coil, electromagentic resonance transmitting coil, electromagentic resonance receiving coil and loading coil, described power coil connects the output of described high-frequency resonant power supply by the input resonant capacitance of connecting, described loading coil connects described high-frequency resonant rectification circuit by the output resonant capacitance of connecting, and between described power coil, described electromagentic resonance transmitting coil, described electromagentic resonance receiving coil and described loading coil, forms and is of coupled connections.
Described electromagentic resonance transmitting coil is identical with described electromagentic resonance receiving coil.
Between described power coil and described electromagentic resonance transmitting coil, be mutually wound around and form a planar structure; Between described electromagentic resonance receiving coil and described loading coil, be mutually wound around and form a planar structure.
As further preferred embodiment, between described power coil and described electromagentic resonance transmitting coil, be mutually wound around and form a snail structure coil; Between described electromagentic resonance receiving coil and described loading coil, be mutually wound around and form a snail structure coil.
As further preferred embodiment, described planar structure is individual layer PCB magnet planar coil structures, and described individual layer PCB magnet planar coil structures comprises PCB coil and pcb board, and the conductor width of described PCB coil is 10%～15% of described PCB coil radius.
As further preferred embodiment, described power coil, described electromagentic resonance transmitting coil, described electromagentic resonance receiving coil and described loading coil adopt described PCB coil, described power coil and described electromagentic resonance transmitting coil form the individual layer PCB magnet planar coil structures of a spiral, and described electromagentic resonance receiving coil and described loading coil form the individual layer PCB magnet planar coil structures of a spiral.
As further preferred embodiment, the material of PCB coil of the present invention is copper cash.
As further preferred embodiment, electromagentic resonance transmitting coil of the present invention, described electromagentic resonance receiving coil are open loop structure.
As further preferred embodiment, electromagentic resonance transmitting coil of the present invention, described electromagentic resonance receiving coil are closed-loop structure.
Beneficial effect:
Compared with prior art, the present invention has the following advantages:
(1) between described power coil and described electromagentic resonance transmitting coil, be mutually wound around and form a planar structure; Between described electromagentic resonance receiving coil and described loading coil, be mutually wound around and form a planar structure, planar structure has reduced space occupancy, reduces resonance frequency, has improved energy transmission efficiency.
(2) conductor width of described PCB coil is 10%～15% of described PCB coil radius.Adopt the wire of this kind of width, can effectively reduce the capacitance of parasitic capacitance, reduce resonance frequency, improve the energy conversion efficiency between electromagentic resonance transmitting coil and electromagentic resonance receiving coil.
(3) described electromagentic resonance transmitting coil, electromagentic resonance receiving coil are open loop structure.Electromagentic resonance transmitting coil, the electromagentic resonance receiving coil of open loop structure are simple in structure, not affected by external circuit connected mode, antijamming capability.
(4) described electromagentic resonance transmitting coil, electromagentic resonance receiving coil are closed-loop structure, the electromagentic resonance transmitting coil of closed-loop structure, electromagentic resonance receiving coil, parasitic capacitance parameter stability, resonance frequency is low, can improve the energy conversion efficiency between electromagentic resonance transmitting coil and electromagentic resonance receiving coil.
Brief description of the drawings
Fig. 1 is circuit structure block diagram of the present invention;
Fig. 2 is the snail structure chart of power coil of the present invention and electromagentic resonance transmitting coil;
Fig. 3 is the snail structure chart of loading coil of the present invention and electromagentic resonance receiving coil;
Fig. 4 is the individual layer PCB magnet planar coil structure chart of loading coil of the present invention and electromagentic resonance receiving coil.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as limiting to the invention.
As shown in Figure 1, a kind of magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure, comprises
---input power 1, there is an output,
---high-frequency resonant power supply 3, has an input and an output;
---high-frequency resonant rectification circuit 10;
Described input power 1 connects one end of AC power load 2, and the other end of described AC power load 2 connects the input of described high-frequency resonant power supply 3;
Also comprise power coil 5, electromagentic resonance transmitting coil 6, electromagentic resonance receiving coil 7 and loading coil 8, described power coil 5 connects the output of described high-frequency resonant power supply 3 by the input resonant capacitance 4 of connecting, described loading coil 8 connects described high-frequency resonant rectification circuit 10 by the output resonant capacitance 9 of connecting, and between described power coil 5, described electromagentic resonance transmitting coil 6, described electromagentic resonance receiving coil 7 and described loading coil 8, forms and is of coupled connections.
Described electromagentic resonance transmitting coil 6 is identical with described electromagentic resonance receiving coil 7.
Between described power coil 5 and described electromagentic resonance transmitting coil 6, be mutually wound around and form a planar structure; Between described electromagentic resonance receiving coil 7 and described loading coil 8, be mutually wound around and form a planar structure.
In the present invention, the coupled wave equation of magnetic resonance coil is as follows
Wherein, | α
1(t) |
2for the energy that under electromagentic resonance state, electromagentic resonance transmitting coil sends; And α
1(t)=A
1e
-j ω 1t, A1 is electromagentic resonance transmitting coil electromagenetic wave radiation range value, ω
1electromagentic resonance transmitting coil electromagenetic wave radiation frequency;
| α
2(t) |
2for the energy of electromagentic resonance receiving coil reception under electromagentic resonance state, and
a2 is electromagentic resonance receiving coil electromagenetic wave radiation range value, ω
2for electromagentic resonance receiving coil electromagenetic wave radiation frequency;
Γ
1the attenuation rate of electromagentic resonance transmitting coil in resonance bandwidth frequency;
Γ
2the attenuation rate of electromagentic resonance receiving coil in resonance bandwidth frequency;
Γ
lbe load resonant bandwidth, its value is proportional to load admittance;
F
s(t) be resonance source forcing value;
K
stfor resonance coupling coefficient.
As shown from the above formula, between described power coil 5 and described electromagentic resonance transmitting coil 6, be mutually wound around and form a planar structure; Between described electromagentic resonance receiving coil 7 and described loading coil 8, be mutually wound around and form a planar structure, in the time that electromagentic resonance transmitting coil 6 is identical with electromagentic resonance receiving coil 7, attenuation rate, electromagentic resonance receiving coil 7 attenuation rate resonance bandwidth frequency in of electromagentic resonance transmitting coil 6 in resonance bandwidth frequency all reduces, reduce resonance frequency, improve energy transmission efficiency, planar structure has reduced space occupancy simultaneously, reduces resonance frequency, has improved energy transmission efficiency.
As shown in Figure 2, as further preferred embodiment, between described power coil 5 and described electromagentic resonance transmitting coil 6, be mutually wound around and form a snail structure coil; As shown in Figure 3, between described electromagentic resonance receiving coil 7 and described loading coil 8, be mutually wound around and form a snail structure coil.
As shown in Figure 4, as further preferred embodiment, planar structure of the present invention is individual layer PCB magnet planar coil structures 9.Individual layer PCB magnet planar coil structures 9 comprises PCB coil and pcb board, and the conductor width of PCB coil is 10%～15% of described PCB coil radius.Adopt the wire of this kind of width, can effectively reduce the capacitance of parasitic capacitance, reduce resonance frequency, improve the energy conversion efficiency between electromagentic resonance transmitting coil, described electromagentic resonance receiving coil.
As further preferred embodiment, power coil 5 of the present invention, described electromagentic resonance transmitting coil 6, described electromagentic resonance receiving coil 7 adopt PCB coil with described loading coil 8, described power coil 5 and described electromagentic resonance transmitting coil 6 form the individual layer PCB magnet planar coil structures 9 of a spiral, described electromagentic resonance receiving coil 7 and described loading coil 8 form the individual layer PCB magnet planar coil structures 9 of a spiral, individual layer PCB magnet planar coil structures 9 has advantages of that noiseproof feature is strong, improves the stability of Energy Transfer.
As further preferred embodiment, the material of PCB coil of the present invention is copper cash.
As further preferred embodiment, electromagentic resonance transmitting coil 6 of the present invention, described electromagentic resonance receiving coil 7 are open loop structure.Electromagentic resonance transmitting coil 6, the electromagentic resonance receiving coil 7 of open loop structure are simple in structure, not affected by external circuit connected mode, and anti-interference energy is strong.
As further preferred embodiment, electromagentic resonance transmitting coil 6 of the present invention, described electromagentic resonance receiving coil 7 are closed-loop structure, the electromagentic resonance transmitting coil 6 of closed-loop structure, electromagentic resonance receiving coil 7 parasitic capacitance parameter stabilities, resonance frequency is low, can improve the energy conversion efficiency between electromagentic resonance transmitting coil 6 and electromagentic resonance receiving coil 7.
The foregoing is only preferred embodiment of the present invention; not thereby limit embodiments of the present invention and protection range; to those skilled in the art; the scheme that being equal to of should recognizing that all utilizations specification of the present invention and diagramatic content done replaces and apparent variation obtains, all should be included in protection scope of the present invention.
Claims (7)
1. the magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure, is characterized in that: comprise
---input power (1), there is an output,
---high-frequency resonant power supply (3), has an input and an output;
---high-frequency resonant rectification circuit (10);
Described input power (1) connects one end of AC power load (2), and the other end of described AC power load (2) connects the input of described high-frequency resonant power supply (3);
Also comprise power coil (5), electromagentic resonance transmitting coil (6), electromagentic resonance receiving coil (7) and loading coil (8), described power coil (5) connects the output of described high-frequency resonant power supply (3) by the input resonant capacitance (4) of connecting, described loading coil (8) connects described high-frequency resonant rectification circuit (10) by the output resonant capacitance (9) of connecting, described power coil (5), described electromagentic resonance transmitting coil (6), between described electromagentic resonance receiving coil (7) and described loading coil (8), form and be of coupled connections,
Described electromagentic resonance transmitting coil (6) is identical with described electromagentic resonance receiving coil (7);
Between described power coil (5) and described electromagentic resonance transmitting coil (6), be mutually wound around and form a planar structure; Between described electromagentic resonance receiving coil (7) and described loading coil (8), be mutually wound around and form a planar structure.
2. the magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure according to claim 1, is characterized in that: between described power coil (5) and described electromagentic resonance transmitting coil (6), be mutually wound around and form a snail structure coil; Between described electromagentic resonance receiving coil (7) and described loading coil (8), be mutually wound around and form a snail structure coil.
3. the magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure according to claim 1, it is characterized in that: described planar structure is individual layer PCB magnet planar coil structures (9), described individual layer PCB magnet planar coil structures (9) comprises PCB coil and pcb board, and the conductor width of described PCB coil is 10%～15% of described PCB coil radius.
4. the magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure according to claim 3, it is characterized in that: described power coil (5), described electromagentic resonance transmitting coil (6), described electromagentic resonance receiving coil (7) adopts described PCB coil with described loading coil (8), described power coil (5) and described electromagentic resonance transmitting coil (6) form the individual layer PCB magnet planar coil structures (9) of a spiral, described electromagentic resonance receiving coil (7) and described loading coil (8) form the individual layer PCB magnet planar coil structures (9) of a spiral.
5. the magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure according to claim 3, is characterized in that: the material of described PCB coil is copper cash.
6. the magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure according to claim 4, is characterized in that: described electromagentic resonance transmitting coil (6), described electromagentic resonance receiving coil (7) are open loop structure.
7. the magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure according to claim 4, is characterized in that: described electromagentic resonance transmitting coil (6), described electromagentic resonance receiving coil (7) are closed-loop structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410166325.7A CN103915916B (en) | 2014-04-23 | 2014-04-23 | Magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure |
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| CN201410166325.7A CN103915916B (en) | 2014-04-23 | 2014-04-23 | Magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure |
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| CN103915916B CN103915916B (en) | 2016-08-31 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682578A (en) * | 2015-03-13 | 2015-06-03 | 喻易强 | Magnetic field balance distribution type wireless power transmission system based on magnetic resonant coupling |
| CN105490396A (en) * | 2016-01-27 | 2016-04-13 | 赵莹 | Receiver and emitter of novel wireless charger |
| CN106410984A (en) * | 2016-11-11 | 2017-02-15 | 东华大学 | Mid-range magnetic resonance wireless energy transfer system |
| CN110391696A (en) * | 2018-04-16 | 2019-10-29 | 弗洛格控股有限公司 | Method and apparatus for carrying out wireless charging to energy storage in fixation or mobile subscriber |
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| CN102868232A (en) * | 2011-07-04 | 2013-01-09 | 中国科学院沈阳自动化研究所 | Magnetic resonance wireless charging device |
| CN102883525A (en) * | 2012-09-25 | 2013-01-16 | 清华大学 | Double-layered snail-shaped PCB coil for wireless energy transfer and design method thereof |
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| CN103368273A (en) * | 2012-03-31 | 2013-10-23 | 深圳光启创新技术有限公司 | Magnetic resonance coil apparatus and wireless power transmission system |
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Patent Citations (7)
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| CN102194021A (en) * | 2010-03-11 | 2011-09-21 | 中芯国际集成电路制造(上海)有限公司 | Method for designing spiral inductor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682578A (en) * | 2015-03-13 | 2015-06-03 | 喻易强 | Magnetic field balance distribution type wireless power transmission system based on magnetic resonant coupling |
| CN105490396A (en) * | 2016-01-27 | 2016-04-13 | 赵莹 | Receiver and emitter of novel wireless charger |
| CN106410984A (en) * | 2016-11-11 | 2017-02-15 | 东华大学 | Mid-range magnetic resonance wireless energy transfer system |
| CN110391696A (en) * | 2018-04-16 | 2019-10-29 | 弗洛格控股有限公司 | Method and apparatus for carrying out wireless charging to energy storage in fixation or mobile subscriber |
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| CN103915916B (en) | 2016-08-31 |
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