CN103915916B - Magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure - Google Patents
Magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure Download PDFInfo
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- CN103915916B CN103915916B CN201410166325.7A CN201410166325A CN103915916B CN 103915916 B CN103915916 B CN 103915916B CN 201410166325 A CN201410166325 A CN 201410166325A CN 103915916 B CN103915916 B CN 103915916B
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Abstract
The present invention relates to a kind of magnetic resonance wireless electric energy transmission device, particularly relate to a kind of magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure.Including input power, there is an outfan, high-frequency resonant power supply, there is an input and an outfan；High-frequency resonant rectification circuit；Compared with prior art, one planar structure coil of composition mutually it is wound around between power coil of the present invention and described electromagentic resonance transmitting coil；Mutually it is wound around between described electromagentic resonance receiving coil and described loading coil and constitutes a planar structure coil, decrease space occupancy, reduce resonant frequency, improve energy transmission efficiency.
Description
Technical field
The present invention relates to a kind of magnetic resonance wireless electric energy transmission device, particularly relate to a kind of humorous based on planar magnetic
The magnetic resonance wireless electric energy transmission device of coupling coil structure of shaking.
Background technology
Wireless power transmission technology is also known as contactless electrical energy transmission technology, as far back as 1890, by Serbia
Descendants famous American Electrical Engineer, physicist Ni Gula tesla propose.Wireless power transmission technology
It is to utilize electromagnetic wave induction principle and relevant alternating current impression technology, is sending and the corresponding line of receiving terminal
Circle send and receive produce sensing AC signal to carry out electric energy transmission, according to electric energy transmission principle
Difference, wireless power transmission can be divided into: induction, electromagentic resonance formula and electromagnetic radiation formula.
International wireless charging alliance to wireless charging alliance issue Qi standard, this Qi standard is to portable
The production of terminal charge equipment and manufacture have carried out professional etiquette model, and what portable terminal charger was applied is exactly
Induction wireless power transmission principle is energized.Initially invented a kind of novel nothing by a company of Britain
Line charger, it looks just as one piece of plastics mouse pad, and this " mouse pad " is inner equipped with intensive little
Type coil array, can produce magnetic field, gives the energy to the electronic equipment equipped with special receiving coil, enters
Row charging.Utilize noncontact " electromagnetic induction " to carry out wireless power transmission technology can much be limited.
The position of such as Transformer Winding, the width of air gap so that quickly can decline along with the increase of distance in magnetic field
Subtract.If electric energy transmission range to be increased, the intensity in magnetic field can only be strengthened.But, magnetic field intensity is the biggest
On the one hand can increase the consumption of electric energy, on the other hand may result in neighbouring use magnetic signal to record information
Equipment failure.So its effective propagation path only has several centimetres, so this wireless power transmission is only fitted
Transmit with short distance electric energy.
Electromagentic resonance formula wireless transmission principles is to be proposed by the research worker of the Massachusetts Institute of Technology.Mark with Qi
The accurate induction transmission difference used, the transmission of electromagentic resonance formula will not to emission electromagnetic wave, and
Forming a radiationless magnetic field the most around, intensity is similar with earth magnetic field intensity, will not be to human body
Producing harmful effect with surrounding devices, its effective propagation path is tens centimetres to several meters, but existing
Electromagentic resonance transmitting coil all uses spatially spiral structure with the structure of electromagentic resonance receiving coil, uses this
Planting structure makes resonant frequency higher, and volume exclusion is big, and electric energy efficiency of transmission is low.
Summary of the invention
The technical problem to be solved in the present invention is, for existing electromagentic resonance coil space helical structure skill
The defect of art, it is provided that a kind of magnetic resonance wireless power transmission based on planar magnetic resonance coupling coil structure fills
Put, including
Input power, has an outfan,
High-frequency resonant power supply, has an input and an outfan；
High-frequency resonant rectification circuit；
Described input power connects one end of alternating current power supply load, and the other end of described alternating current power supply load is even
Connect described high-frequency resonant power input；
Also include power coil, electromagentic resonance transmitting coil, electromagentic resonance receiving coil and loading coil,
Described power coil connects the outfan of described high-frequency resonant power supply by input series resonant capacitance, described
Loading coil by output series resonant capacitance connect described high-frequency resonant rectification circuit, described power coil,
Described electromagentic resonance transmitting coil, between described electromagentic resonance receiving coil and described loading coil formed coupling
Close and connect.
Described electromagentic resonance transmitting coil is identical with described electromagentic resonance receiving coil.
Mutually it is wound around between described power coil and described electromagentic resonance transmitting coil and constitutes a planar junction
Structure；Mutually it is wound around between described electromagentic resonance receiving coil and described loading coil and constitutes a planar structure.
As further preferred embodiment, between described power coil and described electromagentic resonance transmitting coil
Mutually it is wound around and constitutes a planar spiral structures coil；Described electromagentic resonance receiving coil and described load line
Mutually it is wound around between circle and constitutes a planar spiral structures coil.
As further preferred embodiment, described planar structure is monolayer PCB magnet planar coil structures,
Described monolayer PCB magnet planar coil structures includes PCB coil and pcb board, the wire of described PCB coil
Width is the 10%～15% of described PCB coil radius.
As further preferred embodiment, described power coil, described electromagentic resonance transmitting coil, institute
State electromagentic resonance receiving coil and use described PCB coil, described power coil and institute with described loading coil
Stating electromagentic resonance transmitting coil and constitute the monolayer PCB magnet planar coil structures of a spiral, described electromagnetism is altogether
Shake the receiving coil monolayer PCB magnet planar coil structures with described loading coil one spiral of composition.
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 electromagnetism are altogether
The receiving coil that shakes is open loop structure.
As further preferred embodiment, electromagentic resonance transmitting coil of the present invention, described electromagnetism are altogether
The receiving coil that shakes is closed-loop structure.
Beneficial effect:
Compared with prior art, the invention have the advantages that
(1) mutually it is wound around composition one between described power coil and described electromagentic resonance transmitting coil to put down
Face structure；Mutually it is wound around between described electromagentic resonance receiving coil and described loading coil and constitutes a plane
Structure, planar structure decreases space occupancy, reduces resonant frequency, improves energy transmission efficiency.
(2) conductor width of described PCB coil is the 10%～15% of described PCB coil radius.Use this
Plant the wire of width, it is possible to effectively reduce the capacitance of parasitic capacitance, reduce resonant frequency, improve electromagnetism
Energy conversion efficiency between ejection values coil and electromagentic resonance receiving coil.
(3) described electromagentic resonance transmitting coil, electromagentic resonance receiving coil are open loop structure.Open loop structure
Electromagentic resonance transmitting coil, electromagentic resonance receiving coil simple in construction, not by external circuit connected mode
Impact, capacity of resisting disturbance.
(4) described electromagentic resonance transmitting coil, electromagentic resonance receiving coil are closed-loop structure, and closed loop is tied
The electromagentic resonance transmitting coil of structure, electromagentic resonance receiving coil, parasitic capacitance parameter stability, resonant frequency
Low, it is possible to increase the energy conversion efficiency between electromagentic resonance transmitting coil and electromagentic resonance receiving coil.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of the present invention；
Fig. 2 is the planar spiral structures figure of power coil of the present invention and electromagentic resonance transmitting coil；
Fig. 3 is the planar spiral structures figure of loading coil of the present invention and electromagentic resonance receiving coil；
Fig. 4 is the monolayer PCB magnet planar coil structures of loading coil of the present invention and electromagentic resonance receiving coil
Figure.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as the present invention's
Limit.
As it is shown in figure 1, a kind of magnetic resonance wireless power transmission based on planar magnetic resonance coupling coil structure
Device, including
Input power 1, has an outfan,
High-frequency resonant power supply 3, has an input and an outfan；
High-frequency resonant rectification circuit 10；
Described input power 1 connect alternating current power supply load 2 one end, described alternating current power supply load 2 another
One end connects the input of described high-frequency resonant power supply 3；
Also include power coil 5, electromagentic resonance transmitting coil 6, electromagentic resonance receiving coil 7 and load line
Circle 8, described power coil 5 connects described high-frequency resonant power supply 3 by input series resonant capacitance 4
Outfan, described loading coil 8 connects described high-frequency resonant rectified current by output series resonant capacitance 9
Road 10, described power coil 5, described electromagentic resonance transmitting coil 6, described electromagentic resonance receiving coil 7
And formed between described loading coil 8 and be of coupled connections.
Described electromagentic resonance transmitting coil 6 is identical with described electromagentic resonance receiving coil 7.
Mutually it is wound around between described power coil 5 and described electromagentic resonance transmitting coil 6 and constitutes a plane
Structure；Mutually it is wound around composition one between described electromagentic resonance receiving coil 7 and described loading coil 8 to put down
Face structure.
In the present invention, the coupled wave equation of magnetic resonance coil is as follows
Wherein, | α1(t)|2The energy sent for electromagentic resonance transmitting coil under electromagentic resonance state；And α1(t)=A1e-jω1t,
A1 is electromagentic resonance transmitting coil electromagenetic wave radiation range value, ω1Electromagentic resonance transmitting coil electromagenetic wave radiation
Frequency；
|α2(t)|2The energy received for electromagentic resonance receiving coil under electromagentic resonance state, and
A2 is electromagentic resonance receiving coil electromagenetic wave radiation range value, ω2For electromagentic resonance receiving coil electromagnetism amplitude
Radio frequency rate；
Γ1It it is electromagentic resonance transmitting coil attenuation rate in resonance bandwidth frequency；
Γ2It it is electromagentic resonance receiving coil attenuation rate in resonance bandwidth frequency；
ΓlBeing load resonant bandwidth, its value is proportional to load admittance；
FsT () is resonance source forcing value；
kstFor resonance coupling coefficient.
As shown from the above formula, between described power coil 5 and described electromagentic resonance transmitting coil 6 mutually
It is wound around and constitutes a planar structure；Phase between described electromagentic resonance receiving coil 7 and described loading coil 8
It is wound around mutually and constitutes a planar structure, when electromagentic resonance transmitting coil 6 and electromagentic resonance receiving coil 7 are complete
Time exactly the same, the electromagentic resonance transmitting coil 6 attenuation rate in resonance bandwidth frequency, electromagentic resonance receive
The coil 7 attenuation rate in resonance bandwidth frequency all reduces, and reduces resonant frequency, improves energy transmission
Efficiency, planar structure decreases space occupancy simultaneously, reduces resonant frequency, improves energy transmission effect
Rate.
As in figure 2 it is shown, as further preferred embodiment, described power coil 5 is with described electromagnetism altogether
Shake mutually to be wound around between transmitting coil 6 and constitute a planar spiral structures coil；As it is shown on figure 3, it is described
Mutually it is wound around between electromagentic resonance receiving coil 7 and described loading coil 8 and constitutes a planar spiral structures
Coil.
As shown in Figure 4, as further preferred embodiment, planar structure of the present invention is monolayer PCB
Magnet planar coil structures 9.Monolayer PCB magnet planar coil structures 9 includes PCB coil and pcb board, PCB
The conductor width of coil is the 10%～15% of described PCB coil radius.Use the wire of this kind of width, energy
Enough capacitances effectively reducing parasitic capacitance, reduce resonant frequency, improve electromagentic resonance transmitting coil, institute
State the energy conversion efficiency between electromagentic resonance receiving coil.
As further preferred embodiment, power coil 5 of the present invention, described electromagentic resonance are launched
Coil 6, described electromagentic resonance receiving coil 7 use PCB coil, described electricity with described loading coil 8
Source coil 5 and described electromagentic resonance transmitting coil 6 constitute the monolayer PCB magnet planar coil knot of a spiral
Structure 9, described electromagentic resonance receiving coil 7 and described loading coil 8 constitute the monolayer PCB of a spiral
Magnet planar coil structures 9, monolayer PCB magnet planar coil structures 9 has the advantage that noiseproof feature is strong,
Put forward the stability of high energy transmission.
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 electromagnetism
Resonance receiving coil 7 is open loop structure.The electromagentic resonance transmitting coil 6 of open loop structure, electromagentic resonance connect
Take-up circle 7 simple in construction, is 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 electromagnetism are altogether
The receiving coil 7 that shakes is closed-loop structure, and the electromagentic resonance transmitting coil 6 of closed-loop structure, electromagentic resonance receive
Coil 7 parasitic capacitance parameter stability, resonant frequency is low, it is possible to increase electromagentic resonance transmitting coil 6 and electricity
Energy conversion efficiency between magnetic resonance reception coil 7.
The foregoing is only preferred embodiment of the present invention, not thereby limit embodiments of the present invention and
Protection domain, to those skilled in the art, it should can appreciate that all utilization description of the invention
And the equivalent done by diagramatic content and the scheme obtained by obvious change, all should comprise
Within the scope of the present invention.
Claims (6)
1. magnetic resonance wireless electric energy transmission device based on planar magnetic resonance coupling coil structure, it is characterised in that:
Including
Input power (1), has an outfan,
High-frequency resonant power supply (3), has an input and an outfan；
High-frequency resonant rectification circuit (10)；
Described input power (1) connects one end of alternating current power supply load (2), and described alternating current power supply loads
(2) the other end connects the input of described high-frequency resonant power supply (3)；
Also include power coil (5), electromagentic resonance transmitting coil (6), electromagentic resonance receiving coil (7)
With loading coil (8), described power coil (5) connects described by input series resonant capacitance (4)
The outfan of high-frequency resonant power supply (3), described loading coil (8) is by output series resonant capacitance (9)
Connecting described high-frequency resonant rectification circuit (10), described power coil (5), described electromagentic resonance are launched
Coupling is formed between coil (6), described electromagentic resonance receiving coil (7) and described loading coil (8)
Connect；
Described electromagentic resonance transmitting coil (6) is identical with described electromagentic resonance receiving coil (7)；
Composition one mutually it is wound around between described power coil (5) and described electromagentic resonance transmitting coil (6)
Individual planar structure；Mutually twine between described electromagentic resonance receiving coil (7) and described loading coil (8)
Around constituting a planar structure；
Described planar structure is monolayer PCB magnet planar coil structures (9), described monolayer PCB magnet planar
Coil structures (9) includes that PCB coil and pcb board, the conductor width of described PCB coil are described PCB
The 10%～15% of coil radius.
Magnetic resonance based on planar magnetic resonance coupling coil structure the most according to claim 1 is wireless
Power transfer, it is characterised in that: described power coil (5) and described electromagentic resonance transmitting coil (6)
Between be mutually wound around and constitute a planar spiral structures coil；Described electromagentic resonance receiving coil (7) and institute
State mutually to be wound around between loading coil (8) and constitute a planar spiral structures coil.
Magnetic resonance based on planar magnetic resonance coupling coil structure the most according to claim 1 is wireless
Power transfer, it is characterised in that: described power coil (5), described electromagentic resonance transmitting coil (6),
Described electromagentic resonance receiving coil (7) and described loading coil (8) use described PCB coil, described
Power coil (5) constitutes the monolayer PCB magnetic recording level of a spiral with described electromagentic resonance transmitting coil (6)
Planar coil structure (9), described electromagentic resonance receiving coil (7) constitutes one with described loading coil (8)
Monolayer PCB magnet planar coil structures (9) of individual spiral.
Magnetic resonance based on planar magnetic resonance coupling coil structure the most according to claim 1 is wireless
Power transfer, it is characterised in that: the material of described PCB coil is copper cash.
Magnetic resonance based on planar magnetic resonance coupling coil structure the most according to claim 3 is wireless
Power transfer, it is characterised in that: described electromagentic resonance transmitting coil (6), described electromagentic resonance connect
Take-up circle (7) is open loop structure.
Magnetic resonance based on planar magnetic resonance coupling coil structure the most according to claim 3 is wireless
Power transfer, it is characterised in that: described electromagentic resonance transmitting coil (6), described electromagentic resonance connect
Take-up circle (7) is closed-loop structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN103915916A CN103915916A (en) | 2014-07-09 |
| CN103915916B true CN103915916B (en) | 2016-08-31 |
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| CN201410166325.7A Expired - Fee Related 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104682578B (en) * | 2015-03-13 | 2017-07-14 | 喻易强 | The magnetic field equal distribution type radio energy transmission system coupled based on magnetic resonance |
| 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 |
| RU2699024C1 (en) * | 2018-04-16 | 2019-09-03 | Фолкуер Холдингс Лимитед | Method and device for wireless charging of electric energy storage unit of fixed or mobile electric consumer |
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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 |
| US20110309689A1 (en) * | 2010-06-17 | 2011-12-22 | Semiconductor Energy Laboratory Co., Ltd. | Electric power transmitting device, electric power receiving device, and power supply method using electric power transmitting and receiving devices |
| 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 |
| CN102255399A (en) * | 2011-07-12 | 2011-11-23 | 西安电子科技大学 | Wireless energy transmission device based on self-resonant electromagnetic induction coupling |
| 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 |
| CN102883525B (en) * | 2012-09-25 | 2015-06-10 | 清华大学 | Double-layered snail-shaped PCB coil for wireless energy transfer and design method thereof |
| CN103312052B (en) * | 2013-07-08 | 2015-08-05 | 东南大学 | A kind of antenna assembly for wireless power supply system |
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