CN103928991A - Magnetic resonance wireless power transmission device based on PCB resonant coupling coil structure - Google Patents
Magnetic resonance wireless power transmission device based on PCB resonant coupling coil structure Download PDFInfo
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- CN103928991A CN103928991A CN201410165728.XA CN201410165728A CN103928991A CN 103928991 A CN103928991 A CN 103928991A CN 201410165728 A CN201410165728 A CN 201410165728A CN 103928991 A CN103928991 A CN 103928991A
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- coil
- pcb
- resonance
- electromagentic
- transmission device
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Abstract
The invention relates to a magnetic resonance wireless power transmission device, in particular to a magnetic resonance wireless power transmission device based on a PCB resonant coupling coil structure. The magnetic resonance wireless power transmission device comprises an input power supply provided with the output end, a high frequency emitting power supply provided with the input end and the output end, an electromagnetic resonance coil provided with the input end and the output end and a rectifying and load circuit. Compared with the prior art, an electromagnetic resonance emitting coil is identical with an electromagnetic resonance receiving coil, both the attenuation rate of the electromagnetic resonance emitting coil in a resonance bandwidth frequency and the attenuation rate of the electromagnetic resonance receiving coil in the resonance bandwidth frequency are reduced, and energy transmission 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 PCB resonance coupling coil structure.
Background technology
Traditional delivery of electrical energy mainly connects by wire, in the ordinary course of things rationally effectively.In recent years, along with panel computer, mobile communication, camera etc. are full of the rise of the mobile consumption electronic product of " hungering and thirst " to electric weight, the demand of the breakthrough charging techniques such as research and development wireless charging improves day by day.
Wireless power transmission technology claims again contactless electric energy transmission technology, as far back as 1890, by Serbia descendants' famous American Electrical Engineer, physicist Ni Gula tesla, is proposed.Utilize electromagnetic wave induction principle and relevant alternating current impression technology, at sending and receiving end, by the AC signal that corresponding coil comes sending and receiving to produce induction, charge a technology, according to the difference of delivery of electrical energy principle, wireless power transmission is divided into: induction, electromagentic resonance formula and electromagnetic radiation formula.
International wireless charging alliance issues Qi standard in July, 2010, and the production of portable terminal charging device and manufacture have been carried out to professional etiquette model, its application be induction wireless power transmission principle energising.By Britain a company, invented a kind of novel radio charger at first, it looks just as a plastics mouse pad, 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-purpose receiving coil is housed, charge, and can give a plurality of equipment charges simultaneously.Utilize noncontact " electromagnetic induction " to carry out wireless power transmission technology and 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 power supply distance, can only strengthen the intensity in magnetic field.Yet the too large one side of magnetic field intensity can increase the consumption of electric energy, near may causing on the other hand, with magnetic signal, carry out the equipment failure of recorded information.So its effective propagation path only has several centimetres, so this wireless power transmission is only applicable to short distance delivery of electrical energy.
The researcher of the electromagentic resonance formula wireless power transmission Shi You Massachusetts Institute of Technology proposes, the induction transmission of 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 whole electromagentic resonance formula transmitting device is to work under high frequency state, causes the efficiency of wireless power transmission lower.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect of existing electromagentic resonance Coil technique, provides a kind of magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure, comprises
---input power, there is an output,
---high-frequency emission power supply, has an input and an output;
---electromagentic resonance coil, has an input and an output;
---rectification and load circuit;
Described input power connects one end of input power load, and the other end of described input power load connects described high-frequency emission power input;
The output of described high-frequency emission power supply connects the input of described electromagentic resonance coil by the input resonant capacitance of connecting, and the output of described electromagentic resonance coil connects described rectification and load circuit by the output resonant capacitance of connecting;
Described electromagentic resonance coil comprises power coil, electromagentic resonance transmitting coil, electromagentic resonance receiving coil and loading coil, between described power coil, described electromagentic resonance transmitting coil, described electromagentic resonance receiving coil and described loading coil, form and be of coupled connections, described power coil connects described input series connection resonant capacitance, the described power coil resonant capacitance of connecting with described input forms input series resonance, described loading coil connects described output series connection resonant capacitance, and described loading coil is connected with described output and formed and export series resonance between resonant capacitance.
Described electromagentic resonance transmitting coil is identical with described electromagentic resonance receiving coil.
As further preferred embodiment, described power coil, described electromagentic resonance transmitting coil, described electromagentic resonance receiving coil and described loading coil all adopt pcb board coil.
As further preferred embodiment, pcb board coil of the present invention comprises pcb board and PCB coil, and described PCB coil is fixedly installed on described pcb board, and described PCB coil is provided with coil the first output and coil the second output.
As further preferred embodiment, the conductor width of PCB coil of the present invention is 10%～15% of described PCB coil radius.
As further preferred embodiment, the material of PCB coil of the present invention is copper cash.As further preferred embodiment, pcb board coil of the present invention adopts the pcb board coil of individual layer PCB loop construction.
As further preferred embodiment, pcb board coil of the present invention adopts pcb board coil, N >=2 and N≤6 of N layer PCB loop construction.
As further preferred embodiment, the pcb board coil of N layer PCB loop construction of the present invention is that N individual layer PCB loop construction is in series by described coil the first output and described coil the second output.
As further preferred embodiment, electromagentic resonance transmitting coil of the present invention is open loop structure.The electromagentic resonance transmitting coil of open loop structure is the PCB coil of individual layer PCB loop construction or the pcb board coil of N layer PCB loop construction.
As further preferred embodiment, electromagentic resonance transmitting coil of the present invention is closed-loop structure.The electromagentic resonance transmitting coil of closed-loop structure is the pcb board coil of N layer PCB loop construction.
As further preferred embodiment, electromagentic resonance transmitting coil of the present invention is the pcb board coil of 3-6 layer PCB loop construction.
As further preferred embodiment, the pcb board coil that electromagentic resonance transmitting coil of the present invention is 3 layers of PCB loop construction.
Beneficial effect:
Compared with prior art, the present invention has the following advantages:
(1) electromagentic resonance transmitting coil is identical with electromagentic resonance receiving coil, and attenuation rate, the electromagentic resonance receiving coil attenuation rate resonance bandwidth frequency in of electromagentic resonance transmitting coil in resonance bandwidth frequency all reduces, and improved energy transmission efficiency.
(2) described power coil, described electromagentic resonance transmitting coil, described electromagentic resonance receiving coil and described loading coil are pcb board coil, and pcb board coil has advantages of that noiseproof feature is strong, improve the stability of wireless power transmission
(3) described electromagentic resonance transmitting coil, electromagentic resonance receiving coil are open loop structure.Electromagentic resonance transmitting coil, the electromagentic resonance receiving coil circuit structure of open loop structure are simple, 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.
(5) 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.
Accompanying drawing explanation
Fig. 1 is circuit structure block diagram of the present invention;
Fig. 2 is electromagentic resonance coil circuit open loop structure schematic diagram of the present invention;
Fig. 3 is the structural representation of PCB structure individual layer PCB coil of the present invention;
Fig. 4 is the structural representation of PCB structure N layer PCB coil of the present invention;
Fig. 5 is the schematic diagram of further optimizing structure of PCB structure N layer PCB coil of the present invention;
Fig. 6 is electromagentic resonance coil circuit closed-loop structure schematic diagram of the present invention.
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, the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure, is characterized in that: comprise
---input power 1, there is an output,
---high-frequency emission power supply 3, has an input and an output;
---electromagentic resonance coil 5, has an input and an output;
---rectification and load circuit 7;
Described input power 1 connects one end of input power load 2, and the other end of described input power load 2 connects described high-frequency emission power supply 3 inputs;
The output of described high-frequency emission power supply 3 connects the input of described electromagentic resonance coil 5 by connect resonant capacitance 4 of input, and the output of described electromagentic resonance coil 5 is by output resonant capacitance 6 connection rectification and the load circuits 7 of connecting;
As shown in Figure 2, described electromagentic resonance coil 5 comprises power coil 8, electromagentic resonance transmitting coil 9, electromagentic resonance receiving coil 10 and loading coil 11, between described power coil 8, electromagentic resonance transmitting coil 9, electromagentic resonance receiving coil 10 and loading coil 11, form and be of coupled connections, described power coil 8 connects described input series connection resonant capacitance 4, connect with described input resonant capacitance 4 of described power coil 8 forms input series resonances, and described loading coil 11 connects described output series connection resonant capacitance 6; Described loading coil 11 is connected with described output and is formed and export series resonance between resonant capacitance 6.
Described electromagentic resonance transmitting coil 9 is identical with described electromagentic resonance receiving coil 10.
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, described electromagentic resonance transmitting coil 9 is identical with electromagentic resonance receiving coil 10, attenuation rate, electromagentic resonance receiving coil 10 attenuation rate resonance bandwidth frequency in of electromagentic resonance transmitting coil 9 in resonance bandwidth frequency all reduces, and improved energy transmission efficiency.
As further preferred implementation, power coil 8 of the present invention, described electromagentic resonance transmitting coil 9, described electromagentic resonance receiving coil 10 all adopt pcb board coil with described loading coil 11.Pcb board coil has advantages of that noiseproof feature is strong, improves the stability of Energy Transfer.
As shown in Figure 3, as further preferred embodiment, PCB structure of the present invention comprises pcb board 12 and PCB coil 13, described PCB coil 13 be fixedly installed with described pcb board 12 on, described PCB coil 13 is provided with coil the first output 14 and coil the second output 15.
As further preferred embodiment, the conductor width of PCB coil 13 of the present invention is 10%～15% of described PCB coil 13 radiuses.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 9, described electromagentic resonance receiving coil 10.
As further preferred embodiment, the material of PCB coil of the present invention is copper cash.
As further preferred embodiment, pcb board coil of the present invention can be the pcb board coil of individual layer PCB coil 13 structures.The pcb board loop construction of individual layer PCB coil 13 structures is simple, parasitic capacitance is little.
As shown in Figure 4, as further preferred embodiment, pcb board coil of the present invention can be the pcb board coil of N layer PCB coil 16 structures, and N >=2 and N≤6 reduce resonance frequency, improve energy transmission efficiency.
As shown in Figure 5, as further preferred embodiment, the pcb board coil that the pcb board coil of N layer PCB coil of the present invention 16 structures also can be N individual layer PCB coil 13 structures is in series by described coil the first output 14 and described coil the second output 15.
As further preferred implementation, electromagentic resonance transmitting coil 9 of the present invention, described electromagentic resonance receiving coil 10 are open loop structure, and the electromagentic resonance transmitting coil 9 of open loop structure, described electromagentic resonance receiving coil 10 can be the pcb board coil of individual layer PCB coil 13 structures or the pcb board coil of N layer PCB coil 16 structures.Electromagentic resonance transmitting coil, the electromagentic resonance receiving coil of open loop structure are simple in structure, not affected by external circuit connected mode, and anti-interference energy is strong.
As shown in Figure 6, as further preferred implementation, electromagentic resonance transmitting coil 9 of the present invention, described electromagentic resonance receiving coil 10 are closed-loop structure, the electromagentic resonance transmitting coil 9 of closed-loop structure, described electromagentic resonance receiving coil 10 can be the pcb board coil of N layer PCB coil 16 structures, the electromagentic resonance transmitting coil 9 of closed-loop structure, electromagentic resonance receiving coil 10, parasitic capacitance parameter stability, resonance frequency is low, can improve the energy conversion efficiency between electromagentic resonance transmitting coil 9 and electromagentic resonance receiving coil 10.
As further preferred implementation, the electromagentic resonance transmitting coil 9 of closed-loop structure of the present invention, described electromagentic resonance receiving coil 10 are the pcb board coil of 3-6 layer PCB loop construction.
As further preferred implementation,, the electromagentic resonance transmitting coil 9 of closed-loop structure of the present invention, described electromagentic resonance receiving coil 10 are the pcb board coil of 3 layers of PCB loop construction.
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; should recognize that being equal to that all utilizations specification of the present invention and diagramatic content done replace and the resulting scheme of apparent variation, all should be included in protection scope of the present invention.
Claims (10)
1. the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure, is characterized in that: comprise
---input power (1), there is an output,
---high-frequency emission power supply (3), has an input and an output;
---electromagentic resonance coil (5), has an input and an output;
---rectification and load circuit (7);
Described input power (1) connects input power load (2) one end, and the other end of described input power load (2) connects described high-frequency emission power supply (3) input;
The output of described high-frequency emission power supply (3) connects the input of described electromagentic resonance coil (5) by the input resonant capacitance (4) of connecting, and the output of described electromagentic resonance coil (5) connects rectification and load circuit (7) by the output resonant capacitance (6) of connecting;
Described electromagentic resonance coil (5) comprises power coil (8), electromagentic resonance transmitting coil (9), electromagentic resonance receiving coil (10) and loading coil (11), between described power coil (8), electromagentic resonance transmitting coil (9), electromagentic resonance receiving coil (10) and loading coil (11), form and be of coupled connections, described power coil (8) connects described input series connection resonant capacitance (4), and described loading coil (11) connects described output series connection resonant capacitance (6);
Described electromagentic resonance transmitting coil (9) is identical with described electromagentic resonance receiving coil (10).
2. the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure according to claim 1, is characterized in that: described power coil (8), electromagentic resonance transmitting coil (9), electromagentic resonance receiving coil (10) and loading coil (11) all adopt pcb board coil.
3. the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure according to claim 2, it is characterized in that: described pcb board coil comprises pcb board (12) and PCB coil (13), described PCB coil (13) is fixedly installed on described pcb board (12), described PCB coil (13) is provided with coil the first output (14) and coil the second output (15), the conductor width of described PCB coil (13) is 10%～15% of described PCB coil (13) radius, and the material of described PCB coil (13) is copper cash.
4. the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure according to claim 2, is characterized in that: described PCB structure is the pcb board coil of individual layer PCB coil (13) structure.
5. the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure according to claim 2, is characterized in that: described PCB structure is pcb board coil, N >=2 and N≤6 of N layer PCB coil (16) structure.
6. the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure according to claim 5, is characterized in that: the pcb board coil of described N layer PCB coil (16) structure is that the pcb board coil of PCB coil (13) structure of N individual layer is in series by described coil the first output (14) and described coil the second output (15).
7. the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure according to claim 5, it is characterized in that: described electromagentic resonance transmitting coil (9) is open loop structure, and open loop structure is the pcb board coil of individual layer PCB coil (13) structure or the pcb board coil of N layer PCB coil (16) structure.
8. the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure according to claim 5, it is characterized in that: described electromagentic resonance transmitting coil (9) is closed-loop structure, and closed-loop structure is the pcb board coil of N layer PCB coil (16) structure.
9. the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure according to claim 8, is characterized in that: described electromagentic resonance transmitting coil (9) is the pcb board coil of 3-6 layer PCB loop construction.
10. the magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structure according to claim 8, is characterized in that: described electromagentic resonance transmitting coil (9) is the pcb board coil of 3 layers of PCB loop construction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410165728.XA CN103928991B (en) | 2014-04-23 | 2014-04-23 | Magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structures |
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| CN201410165728.XA CN103928991B (en) | 2014-04-23 | 2014-04-23 | Magnetic resonance wireless electric energy transmission device based on PCB resonance coupling coil structures |
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| CN103928991A true CN103928991A (en) | 2014-07-16 |
| CN103928991B CN103928991B (en) | 2017-03-29 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333145A (en) * | 2014-10-18 | 2015-02-04 | 刘跃进 | Electric vehicle-used rechargeable tire and tire-type wireless charging belt system |
| CN104578240A (en) * | 2014-10-18 | 2015-04-29 | 刘跃进 | Automatic-focusing wireless charging belt system and full-automatic laying device for wireless charging belt |
| CN105337334A (en) * | 2014-08-08 | 2016-02-17 | 刘跃进 | Novel magnetic conductive rubber and magnetic conductive tyre charging system used for charging electric automobile in operation |
| CN106410984A (en) * | 2016-11-11 | 2017-02-15 | 东华大学 | Mid-range magnetic resonance wireless energy transfer system |
| CN108599396A (en) * | 2018-06-14 | 2018-09-28 | 西安电掣风云智能科技有限公司 | Ultra-thin broadband medium and long distance wireless power transmission coil |
| CN114208399A (en) * | 2020-07-16 | 2022-03-18 | 友晏爱科技有限公司 | System for reducing electromagnetic wave absorption rate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105337334A (en) * | 2014-08-08 | 2016-02-17 | 刘跃进 | Novel magnetic conductive rubber and magnetic conductive tyre charging system used for charging electric automobile in operation |
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| CN104578240A (en) * | 2014-10-18 | 2015-04-29 | 刘跃进 | Automatic-focusing wireless charging belt system and full-automatic laying device for wireless charging belt |
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| CN114208399A (en) * | 2020-07-16 | 2022-03-18 | 友晏爱科技有限公司 | System for reducing electromagnetic wave absorption rate |
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| CN103928991B (en) | 2017-03-29 |
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Granted publication date: 20170329 Termination date: 20180423 |