CN209088633U - A kind of novel high-density wireless electric energy transmission coil structure - Google Patents
A kind of novel high-density wireless electric energy transmission coil structure Download PDFInfo
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- CN209088633U CN209088633U CN201820401850.6U CN201820401850U CN209088633U CN 209088633 U CN209088633 U CN 209088633U CN 201820401850 U CN201820401850 U CN 201820401850U CN 209088633 U CN209088633 U CN 209088633U
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Abstract
The utility model discloses a kind of novel high-density wireless electric energy transmission coil structure, transmitting coil is in parallel by its Same Name of Ends by the canoe of rotating Vortex by the small coil of several close couplings and constitutes；Its Same Name of Ends is connected in series by the canoe of the small coil that receiving coil is coupled by several sequentially counter rotating；The small coil for constituting receiving coil is consistent with the resonance frequency of small coil of transmitting coil is constituted.The transmitting coil of the structure passes through the small coils from parallel connection of coils of two close couplings, and mutual inductance each other is bigger, close to 1, greatly strengthens the magnetic flux density of transmitting coil, can lay a good foundation for efficiently biography.The inductance that two small coils of composition receiving coil are cascaded is far longer than the superposition of the inductance of two independent coils, thus considerably increases efficiency of transmission.Under the premise of structure space needed for guaranteeing transmitting, receiving both ends, safe distance and required electric energy, increase the transmission range and power density of coupling mechanism.
Description
Technical field
The utility model belongs to wireless power transmission field, especially relates to a kind of novel high-density wireless electric energy biography
Defeated loop construction.
Background technique
Since discovery in 1840 can transmit electric energy so far using electromagnetic induction phenomenon and conducting wire, the transmission of electric energy is mainly
It is directly contacted by conducting wire and to be transmitted.The charging of electrical equipment is carried out generally by plug and socket, but is being carried out
When high-power charging, there are the danger that high pressure is got an electric shock for this charging modes.And since there are friction and wear, the safety of system
Property, reliability and service life are lower, especially in some inflammable, explosive fields such as chemical industry, mining, easily cause big thing
Therefore.New contactless electrical energy transmission system is combined using electromagnetic induction principle, power electronic technique and control theory, is realized
The wireless transmission of electric energy, overcomes the above limitation completely.According to electric energy transmission principle, wireless power transmission can generally divide
For three classes: the first kind is the direct coupling type of transformer principle, and this mode power is although larger, but is only suitable for closely；
Second class electric wave wireless energy transmission technology, directly can be by antenna transmitting and received principle using electromagnetic wave energy, this
Although kind mode realizes the transmission over long distances with high-power energy, but energy transmission is limited by direction, can not be around barrier
Hinder object, and be lost larger, has grievous injury to human body and other biologies；Third class is non-radiative coupled resonance mode, should
Technology can be transmitted in the case where there is barrier, and transmission range is also distant, and transimission power is also larger, and not had to human body
Injury.
John professor Boys of the nineties in last century, Auckland, NZL university take the lead in leading seminar to radio energy
Transmission technology has carried out extensive research, and 2000, they were by 1.8kW electromagnetic induction wireless power transmission charging system
It is successfully applied on tourist's electric transporting vehicle in the famous national underground heat park of New Zealand.The electronic vehicle radio of Nissan's research and development
The demonstration system that charges can realize that 6kW wireless power transmission, this system are also equipped with navigation system with 90% efficiency of transmission
To solve the problems, such as the position alignment of transmitting end-coil and vehicle-mounted receiving coil.German Ao Mufuer (WAMPELER) company builds
Maximum induction radio energy transmission system in the world is mounted with the reception windings that 6 output is 25kW on vehicle, thus
So that overall system capacity reaches 150kW.U.S.'s Oak Ridge National Laboratory started the insertion of electromagnetic induction principle in 2010
3.6kW -60kW grades of electric vehicle static state and dynamic charging system, target are developed in formula electric motor car wireless charging project, plan
It is to be able to maintain system efficiency of transmission 90% or more when trigger mechanism and acceptance agencies distance are in 20cm.It travels to and fro between in the U.S.
Electric train between MGM-Hotels, MonteCarlo and LasVegas, the system use single track wireless power mode, lead
Rail electric current 150A, alternating voltage 480V.2014, wireless confession of the Railway Technique in Korea research institute in its exploitation of Soul trial operation
Electric train, power supply spacing are 3cm, and power supply capacity reaches 1MW, speed per hour 3-4km/h.
Coupling mechanism is the important component of wireless power transmission technology, and the coupled pair radio energy of high-quality passes
The influence of the transmission performance of defeated system be it is vital, its design and optimization is to the efficiency of transmission of system, power, transmission distance
From etc. have direct influence.For radio energy transmission system, coupling coil in practical work process its transmitting and
There is very big air gap between receiving portion, higher leakage field will lead to coupling performance decline, so that whole system
Efficiency of transmission be greatly reduced, the phenomenon high-power energy transfer system application in it is particularly evident.In order to improve the biography of WPT system
Defeated efficiency, the shape and structure of design and optimization coupling coil are particularly important.Some scholars are to double DD coils and monopole line
Circle is studied.It is absorbed in loop construction design to combine with Topology Structure Design, to reach the maximum coefficient of coup and efficiency.?
In the research of numerous coil designs, using different evaluation criterion and Optimizing Flow, coil design and optimization have been carried out, so that
Coil design is more reasonable.But design analysis is based on one-to-one two coil former.
However, the size and primary of coupling coil, the distance of secondary two coils etc. are applied in wireless charging system
The limitation of occasion.For example, the wireless charging system coil being applied in energy storage type tramcar or electric car is in addition to by vehicle
Outside body size influences, primary coil receives the limitation of gauge, and the size of its compartment crossbeam also determines secondary coil
Size.Due to limiting two coil shapes and size with first-class factor.And the increase of primary and secondary self-induction of loop value can increase
Add coil turn, to increase series equivalent resistance, and increase system loss, therefore is primary, secondary coil limited from inductance value,
It is more difficult to effectively increase primary, secondary coil mutual inductance.In addition to this, radio energy transmission system is the high-power applications such as rail traffic
When providing electric energy, two coil formers are difficult to realize the non-contact transmission of high-power power.Southwest Jiaotong University analyzes double primary
Coil and around IPT system, pass through primary coil generate magnetic field superposition, realize IPT system high-power output.The Chinese Academy of Sciences grinds
Study carefully double pick-up winding parallel-connection structure WPT systems, has studied influence of the mutual inductance between pick-up winding to output power, and propose
Making system output power by adjusting the method for picking up side compensating electric capacity, mutual inductance is not influenced between by pick-up winding.Traffic In Beijing is big
Mutual inductance between more pick-up windings of credit analysis verifying will affect system resonance frequencies, reduce output power and the work of IPT system
Efficiency.Above-mentioned design realizes the non-contact power transmission of high power on the basis of increasing number of coils.But they are not
It is improved the efficiency of remote WPT system.
Utility model content
Technical problem to be solved in the utility model be guarantee transmitting, receive both ends needed for space, safe distance with
And under the premise of required electric energy, increase the transmission range and power density of coupling mechanism.In the lower situation of frequency of supply, if
Count out it is a kind of compared to two traditional coil formers have volume it is smaller, weight is lighter, more efficient loop construction.To increase
Add the efficiency of transmission of entire radio energy transmission system.
In order to achieve the above objectives, the technical solution of the utility model is achieved in that
A kind of novel high-density wireless electric energy transmission coil structure, including mutual corresponding transmitting coil and reception line
Circle, the transmitting coil include several close couplings small coil by rotating Vortex canoe by its Same Name of Ends is in parallel and structure
Its Same Name of Ends is connected by sequentially incorgruous rotation canoe at the small coil that, the receiving coil includes several couplings and
At；The small coil for constituting receiving coil is consistent with the resonance frequency of small coil of transmitting coil is constituted.
The sequentially incorgruous adjacent small coil of rotation canoe, that is, any two is all that one of them small coil is right
Rotation winding, the left-handed winding of one small coil.
Further, collocation structure uses series compensation structure, i.e., respectively series connection is mended respectively for transmitting coil and receiving coil
Repay capacitor.
Further, the small coil for constituting the transmitting coil is completely the same.
Further, the small coil for constituting the receiving coil is completely the same.
Further, the transmitting coil includes 2 small coils, and 2 small coils are left-handed or are simultaneously right simultaneously
The canoe of rotation, and Same Name of Ends is in parallel.
Further, the receiving coil includes 2 small coils, and 2 small coils are one small coil dextrorotation, separately
The left-handed canoe of one small coil, and Same Name of Ends is connected.
Compared with prior art, the utility model have it is following the utility model has the advantages that
The novel high-density wireless electric energy transmission coil structure of one kind described in the utility model mentions to enhance magnetic field
The efficiency of transmission between coupling mechanism is risen, transmitting coil is by the small coil of several close couplings by dextrorotation left-handed or in the same direction in the same direction
Canoe it is its Same Name of Ends is in parallel and constitute, when canoe is in the same direction, magnetic direction caused by each small coil is one
It causes, has the function of that enhancing, Same Name of Ends parallel connection can enhance inductance on the basis of the original for the propagation of energy, so that
Its transmitting coil has a higher quality factor, and mutual inductance each other is bigger, close to 1, greatly strengthens hair
The magnetic flux density of ray circle can lay a good foundation for efficiently biography；
The utility model is not in order in the case where increasing the size and volume of coil, moreover it is possible to improve transmission effect at a distance
Its Same Name of Ends is connected using sequentially incorgruous rotation canoe, that is, appointed by rate, the small coil that receiving coil is coupled by several
One of them left-handed canoe of one small coil of small coil dextrorotation of two small coils for anticipating adjacent simultaneously connects its Same Name of Ends
It forms；Sequentially incorgruous rotation canoe connects its Same Name of Ends, and inductance is far longer than the sum of all small winding inductance quantities,
The quality factor for substantially increasing receiving coil, thus considerably increase efficiency of transmission；
Under the premise of electric energy needed for the utility model space safety needed for guaranteeing the two distance and train, compared to biography
Two coil formers of system have the characteristics that volume is smaller, weight is lighter, more efficient, i.e., under identical circumstances, the coil knot
Structure has power density more higher than two coil configuration, is the loop construction that a kind of frequency of supply is low, efficiency of transmission is high.This is practical
The novel conventional wireless energy transmission structure for overcoming prior art use causes efficiency of transmission to be greatly reduced as distance increases
Limitation, and the transmission of power can effectively be increased by transmitting coil parallel connection, and concatenated receiving coil can be not
The inductance of receiving coil greatly improved in mutual inductance between passing through in the case where increasing winding volume.In farther away transmission
It does not change apart from lower guarantee winding volume and is increased transimission power and efficiency of transmission and system space flexibility.
Detailed description of the invention
Fig. 1 (a) is the coil of the utility model embodiment, electrical block diagram one；
Fig. 1 (b) is the coil of the utility model embodiment, electrical block diagram two；
Fig. 1 (c) is the coil of the utility model embodiment, electrical block diagram three；
Fig. 2 is the utility model embodiment and string coil and two coil theoretical efficiency comparison diagrams；
Fig. 3 is the utility model embodiment apart from efficiency value comparison diagram；
Fig. 4 (a) is the magnetic flux distribution figure of two small coil Opposite direction connections of transmitting；
Fig. 4 (b) is the magnetic flux distribution figure that two small coils of transmitting connect in the same direction；
Fig. 5 (a) is the concatenated magnetic flux distribution figure in different name end；
Fig. 5 (b) is the concatenated magnetic flux distribution figure of Same Name of Ends.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the embodiments of the present invention, as shown in Fig. 1 (a), Fig. 1 (b) Fig. 1 (c), Us is high-frequency inversion voltage source,
Emission system further includes compensation circuit, by the transmitting coil of 2 small coils from parallel connection of coils；The small coil inside radius of 2 rectangles in parallel is
17cm, outer radius 30cm, resonance frequency 100kHz collectively form electromagnetic launch system with SS compensation circuit.
The transmitting coil of 2 small coils from parallel connection of coils, be close coupling 2 small coil (emitting small coil 1, the small coil 2 of transmitting) by
What left-handed canoe constituted the parallel connection of its Same Name of Ends, mutual inductance each other is bigger, close to 1, increases greatly
The strong magnetic flux density of transmitting coil, can lay a good foundation for efficiently biography；
The structural principle of transmitting coil are as follows: when the canoe of transmitting coil is in the same direction, magnetic field side caused by two coils
To being consistent, has the function of enhancing for the propagation of energy.Its Same Name of Ends parallel connection can enhance electricity on the basis of the original
Sense is conducive to pass energy so that its transmitting coil has a higher quality factor.If different name end is in parallel, whole transmitting coil
Inductance fall sharply, quality factor reduce, biography can weaken.Fig. 4 (a) is the magnetic flux density point of two small coil Opposite direction connections of transmitting
Butut, Fig. 4 (b) are the magnetic flux distribution figures that two small coils of transmitting connect in the same direction.Thus it is not difficult to find out that, when two transmittings are small
When coil connects in the same direction, the distribution in magnetic field is more intensive, and magnetic flux density is bigger, and it is more preferable to pass energy effect.
It includes by the concatenated receiving coil of 2 small coils (receive small coil 3, receive small coil 4), SS that electromagnetism, which receives system,
Compensation circuit and attenuator load.
The concatenated small coil inside radius of 2 rectangles is 17cm, outer radius 30cm, resonance frequency 100kHz, with SS benefit
It repays circuit and collectively forms electromagnetism reception device.
In order in the case where not increasing the size and volume of coil, moreover it is possible to improve remote efficiency of transmission, receive line
2 of circle receive small coil 3,4, are the small coils of 2 couplings, a small coil is by one small coil of dextrorotation by left-handed winding
Mode connects its Same Name of Ends；
It is found through experiments that, the incorgruous rotation canoe of two small coils connects its Same Name of Ends, and inductance is much
Greater than the sum of the two inductance, the quality factor of receiving coil are substantially increased.
Although counter rotating, but still Same Name of Ends series system is used, this is because magnetic field caused by coil is one
The curve of closure, if so the magnetic flux of its transmitting is directly proportional to the magnetic flux of receiving and both receiving coils are reversed, production
Raw magnetic direction is cancelled out each other, and does not just have magnetic field like that, also just will be greatly reduced energy transfer efficiency without energy.Pass through emulation
Experiment is it is not difficult to find out that come, and Fig. 5 (a) is the series connection of different name end, and magnetic flux density is very sparse, and Fig. 5 (b) is Same Name of Ends series connection, magnetic
Field direction distribution is very intensive.
In the present embodiment, high-frequency inversion voltage source USIncluding DDS HF signal generator and power amplifier, DDS
HF signal generator issues the high-frequency signal of 100KHz, increases its power through power amplifier, compensated circuit is applied to electricity
Magnetic emitter, compensation circuit is for making transmitting coil and receiving coil in same operation at frequencies.
Signal generator and power amplifier are merged into the power supply of system.Select impedance negative for 50 attenuator conduct
It carries, to ensure that load impedance matches.In view of skin effect, all coils be all be the litz wire of 3mm with diameter made of,
And it is furnished with ferrite shielded layer.Ferrite-plate (53cm × 53cm × 0.25cm) is made of the PC95 from TDK.
I1,I2, respectively represent the current value of two small coils 1,2 of transmitting, I3It is the electric current of two concatenated receiving coils
Value.L1,L2, it is the inductance value of two small coils 1,2 of transmitting, L3,L4It is two inductance values for receiving small coil 3,4.C1,C2Respectively
Represent the series resonant capacitance of transmitting terminal and receiving end.R1,R2, it is the resistance of two small coils 1,2 of transmitting, R respectively3,R4It is
Two receive the resistance of small coil 3,4. M12For the mutual inductance value between two small coils 1,2 of transmitting, M34It is two and receives small line
Mutual inductance value between circle 3,4, M13,M14It is the mutual inductance value that the small coil 1 of transmitting receives small coil 3,4 to two, M respectively23,M24It is
Emit the mutual inductance value that small coil 2 receives small coil 3,4 to two.RLIt is system load.
According to the structure of coil, we are approximate by M13=M23=M1S, M14=M24=M2S, according to Kirchhoff's second law
(KVL) equivalent equation of circuit can be obtained:
Wherein:
Since two coils of primary side are completely the same:
R1=R2=R, L1=L2=L, Z1=Z2=Z (3)
Current value in each circuit calculates as follows:
Wherein:
Coil is in resonant operational state, it may be assumed that
Finally, the output power that system is total are as follows:
The efficiency of transmission of system are as follows:
Mutual inductance M between the efficiency and coil of radio energy transmission system it can be seen from formula (7) and (8) is related,
Also with load resistance RL, the internal resistance of source and coil resistance R1-R4It is related.
Table 1 lists the theoretical parameter value of loop construction.
The theoretical value and measured value of 1 coil parameter of table
In order to prove the utility model and-get lines crossed coil structures i.e. p-s loop construction the advantages of, compare p-s coil mould
The theoretical value of type and two coil formers, as shown in fig. 2, it can be seen that the whole efficiency of p-s coil former desired value is higher, card
Its validity is illustrated.
Emitter is as shown in table 2 with efficiency value at a distance from reception device in the utility model:
Table 2 is apart from efficiency value
As shown in figure 3, being the data analysis chart of distance and efficiency value.As can be seen that p-s coil efficiency is higher, more demonstrate,prove
Its validity is illustrated.
About the acquisition of loop construction, principle is described as follows:
By finding out k12(i.e. the coefficient of coup between two primary coils) and k34(i.e. coupling between two secondary coils
Collaboration number) optimum value, the structure of available coil.Experiment discovery works as the coefficient of coup between two primary coils increasingly
When close to the coefficient of coup between 1, and two receiving coils close to 0, the whole efficiency of loop construction has optimal value.Therefore
Transmitting coil parallel connection, the concatenated loop construction of receiving coil has been determined.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (6)
1. a kind of novel high-density wireless electric energy transmission coil structure, which is characterized in that including mutual corresponding transmitting coil
And receiving coil, the transmitting coil include several close couplings small coil by the canoe of rotating Vortex by its Same Name of Ends
In parallel and constitutes, the receiving coil includes that several small coils for coupling are of the same name by its by sequentially incorgruous rotation canoe
End is connected in series；The small coil for constituting receiving coil is consistent with the resonance frequency of small coil of transmitting coil is constituted.
2. the novel high-density wireless electric energy transmission coil structure of one kind according to claim 1, which is characterized in that compensation
Structure uses series compensation structure, i.e. transmitting coil and receiving coil distinguishes respective series compensation capacitance.
3. the novel high-density wireless electric energy transmission coil structure of one kind according to claim 1, which is characterized in that constitute
The small coil of the transmitting coil is completely the same.
4. the novel high-density wireless electric energy transmission coil structure of one kind according to claim 1, which is characterized in that constitute
The small coil of the receiving coil is completely the same.
5. the novel high-density wireless electric energy transmission coil structure of one kind according to claim 1, which is characterized in that described
Transmitting coil includes 2 small coils, and 2 small coils are simultaneously canoe that is left-handed or being simultaneously dextrorotation, and of the same name
End is in parallel.
6. a kind of novel high-density wireless electric energy transmission coil structure according to claim 1 or 5, which is characterized in that
The receiving coil includes 2 small coils, and 2 small coils, which are one small coil dextrorotation, another small coil is left-handed twines
Around mode, and Same Name of Ends is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820401850.6U CN209088633U (en) | 2018-03-23 | 2018-03-23 | A kind of novel high-density wireless electric energy transmission coil structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820401850.6U CN209088633U (en) | 2018-03-23 | 2018-03-23 | A kind of novel high-density wireless electric energy transmission coil structure |
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| CN209088633U true CN209088633U (en) | 2019-07-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206590A (en) * | 2018-03-23 | 2018-06-26 | 天津工业大学 | A kind of novel high-density wireless electric energy transmission coil structure |
| CN111216602A (en) * | 2020-01-07 | 2020-06-02 | 兰州交通大学 | Method for distributing and optimizing regenerative braking energy in non-contact traction power supply system station |
| CN113660014A (en) * | 2021-08-03 | 2021-11-16 | 中山大学 | Channel capacity optimization method and device based on multiple resonant frequencies |
-
2018
- 2018-03-23 CN CN201820401850.6U patent/CN209088633U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206590A (en) * | 2018-03-23 | 2018-06-26 | 天津工业大学 | A kind of novel high-density wireless electric energy transmission coil structure |
| CN111216602A (en) * | 2020-01-07 | 2020-06-02 | 兰州交通大学 | Method for distributing and optimizing regenerative braking energy in non-contact traction power supply system station |
| CN113660014A (en) * | 2021-08-03 | 2021-11-16 | 中山大学 | Channel capacity optimization method and device based on multiple resonant frequencies |
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Granted publication date: 20190709 Effective date of abandoning: 20200609 |