CN107819362A - A kind of wireless charging electric wire coil assembly - Google Patents
A kind of wireless charging electric wire coil assembly Download PDFInfo
- Publication number
- CN107819362A CN107819362A CN201711195358.4A CN201711195358A CN107819362A CN 107819362 A CN107819362 A CN 107819362A CN 201711195358 A CN201711195358 A CN 201711195358A CN 107819362 A CN107819362 A CN 107819362A
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- Prior art keywords
- enamel
- covered wire
- wireless charging
- coil
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000013039 cover film Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 4
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000005389 magnetism Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 18
- 210000003298 dental enamel Anatomy 0.000 description 12
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000004020 conductor Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000010793 electronic waste Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of wireless charging electric wire coil assembly, including magnetic sheet and the coil being arranged on magnetic sheet, the coil is formed by least two groups enamel-covered wire group coilings parallel with one another, the enamel-covered wire group is twisted by multiply enamel-covered wire, enamel-covered wire group described in every group has first end and the second end respectively, the first end of enamel-covered wire group is connected together as a lead end of the coil at least described in two groups, and the second end of enamel-covered wire group is connected together as another lead end of the coil at least described in two groups.Wireless charging electric wire coil assembly proposed by the present invention, under conditions of slim size is kept, the loss of coil is greatly reduced, realizes higher efficiency of transmission.
Description
Technical field
The present invention relates to electronic component field, more particularly to a kind of wireless charging electric wire coil assembly.
Background technology
With the development and popularization of the portable type electronic products such as mobile phone, tablet personal computer, digital camera, people are to electronic product
Charging requirement also more and more higher.Traditional charging adapter has that interface is not general, electric wire is excessive, produces electronic waste etc.
Shortcoming, people increasingly want to freely charge for various electronic equipments.
In recent years, wireless charging device receives significant attention.Electronic product is placed on into can in chargeable range to charge, pendulum
The constraint of power line has been taken off, there is the advantages of safe and reliable, convenient, flexible, while multiple electronic products can be given to charge,
Different electronic products can be charged using identical wireless charging device.
Existing wireless charging mode mainly includes 4 kinds：Way of electromagnetic induction, magnetic resonance mode, electric wave reception mode and
Field coupling mode.Wherein, way of electromagnetic induction volume production, and pass through safety and market validation.
As shown in figure 1, transmit schematic diagram, the transmitting coil which passes through charging equipment end for way of electromagnetic induction energy
Tx is coupled with the receiving coil Rx at electronic product end to realize the transmission of electromagnetic energy.Tx and Rx composition energy transmission system
System, maximum transmitted efficiency eta max therebetween can be obtained by following formula.
Wherein, the coefficients of coup of the K between Rx and Tx, Q are Transmission system quality factor, i.e. Rx quality factor qRWith Tx
Quality factor qTGeometrical mean.
Wherein, ω be system resonance angular frequency, mutual inductance value of the M between Tx and Rx coils, RTXWith RRXRespectively Tx with
The loss (AC resistance ACR) of Rx coils.
As the above analysis, the efficiency eta max of Transmission system is improved, can be by reducing Rx, Tx loss or increasing
Greatly mutual inductance value between Rx and Tx is realized.
And in actual applications, in order to adapt to the slimming demand of electronic equipment, the requirement of receiving coil Rx component thickness is very
It is thin so that receiving coil Rx loss RRXLoss R much larger than transmitting coil TxTX, turn into the skill of wireless charging system at this stage
Art bottleneck.
The disclosure of background above technology contents is only used for design and the technical scheme that auxiliary understands the present invention, and it is not necessarily
Belong to the prior art of present patent application, no tangible proof show the above present patent application the applying date
In the case of disclosed, above-mentioned background technology should not be taken to evaluate the novelty and creativeness of the application.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention proposes a kind of wireless charging electric wire coil assembly, is keeping slim size
Under the conditions of, the loss of coil is greatly reduced, realizes higher efficiency of transmission.
In order to achieve the above object, the present invention uses following technical scheme；
The invention discloses a kind of wireless charging electric wire coil assembly, including magnetic sheet and the coil being arranged on magnetic sheet, the line
Circle is formed by least two groups enamel-covered wire group coilings parallel with one another, and the enamel-covered wire group is twisted by multiply enamel-covered wire, every group
The enamel-covered wire group has first end and the second end respectively, and at least the first end of enamel-covered wire group is connected together as described in two groups
One lead end of the coil, the second end of enamel-covered wire group is connected together as the another of the coil and drawn at least described in two groups
Line end.
Preferably, enamel-covered wire group is fixed on along the radial parallel arrangement of the magnetic sheet and around one layer at least described in two groups
On the magnetic sheet.
Preferably, at least enamel-covered wire group is bonded on the magnetic sheet by glue or adhesive tape described in two groups.
Preferably, enamel-cover film is wrapped up outside enamel-covered wire group described in every group and the per share enamel-covered wire.
Preferably, the cross section of the enamel-covered wire group is circle.
Preferably, the cross section of the enamel-covered wire is circle.
Preferably, the line footpath of the enamel-covered wire is 0.02~0.2mm.
Preferably, the enamel-covered wire group is twisted by 7 strands of enamel-covered wires.
Preferably, the magnetic sheet is soft magnetic materials, and thickness is 0.05~0.4mm.
Compared with prior art, the beneficial effects of the present invention are：Wireless charging electric wire coil assembly proposed by the present invention, wherein
Coil is formed by least two groups enamel-covered wire group coilings parallel with one another, and the enamel-covered wire group is twisted by multiply enamel-covered wire, its
The diameter of middle sub-thread enamel-covered wire is much smaller than the square line length of side and round wires diameter used by prior art so that passes through multiply enamel-covered wire
The enamel-covered wire group being twisted can substantially reduce the Kelvin effect and kindred effect of copper cash, reduce the AC resistance of coil, so as to
The loss of coil is substantially reduced, realizes higher efficiency of transmission.
Brief description of the drawings
Fig. 1 is the transmission schematic diagram of induction wireless charging energy；
Fig. 2 is the structural representation of the wireless charging electric wire coil assembly of the preferred embodiment of the present invention；
Fig. 3 is the structural representation of two square line parallel wound coil components in the prior art；
Fig. 4 is the structural representation of two round wires parallel wound coil components in the prior art.
Embodiment
Below against accompanying drawing and with reference to preferred embodiment, the invention will be further described.
As shown in Fig. 2 be wireless charging electric wire coil assembly disclosed in the preferred embodiment of the present invention, including magnetic sheet 2 and it is arranged on
Coil 1 on magnetic sheet 2, coil 1 form (coil 1 in the present embodiment by two or more sets coilings of enamel-covered wire group 3 parallel with one another
It is to be formed by two groups of coilings of enamel-covered wire group 3 parallel with one another), every group of enamel-covered wire group 3 is twisted by multiply enamel covered wire 4, its
In every group of enamel-covered wire group 3 there is first end and second segment respectively, the first end of each group enamel-covered wire group 3 is connected together as coil
1 lead end, the second end of each group enamel-covered wire group 3 are connected together as another lead end of coil 1.
In certain embodiments, each group enamel-covered wire group 3 is along 2 radial parallel arrangement of magnetic sheet, and around one layer, by glue or
Adhesive tape is bonded and fixed on magnetic sheet 2；Enamel-cover film is enclosed with to realize each group outside every group of enamel-covered wire group 3 and per share enamel covered wire 4
Mutually insulated between enamel-covered wire group 3 and between each stock enamel covered wire 4.
In certain embodiments, the cross section of enamel covered wire 4 is circle；The enamel-cover being twisted by multiply enamel covered wire 4
The cross section of line group 3 is also circle；Magnetic sheet 2 is soft magnetic materials, and thickness is 0.05~0.4mm.
It is that two square lines and two round wires distinguish the wireless charging that coiling forms in the prior art respectively with reference to Fig. 3 and Fig. 4
The structural representation of coil block, by the Wireless charging coil of the preferred embodiment of the present invention and Fig. 3 and Fig. 4 Wireless charging coil
Structure contrasted；Wherein contrast for convenience, the external diameter phase of the length of side of the side's of setting line, the diameter of round wires and enamel-covered wire group
Deng being represented with a, enamel covered wire 4 is round wires, and according to imposing a condition, the relation of its number of share of stock and line footpath is as shown in table 1, if a is unit
1。
Table 1
From table 1, it is apparent that the square line used with prior art, compared with round wires, it is proposed by the present invention by multiply
The sectional area analogy line for the enamel-covered wire group 3 that enamel covered wire 4 is twisted, round wires will be small, in hold-in winding other conditions (as enclosed
Number) it is consistent in the case of, on the one hand coil D.C. resistance DCR can be caused to increase using enamel-covered wire group, on the other hand also certain
Reduce the dosage of copper in degree.
And the AC resistance ACR of coil is by D.C. resistance DCR in addition to being influenceed, Kelvin effect, neighbour also with copper cash
Nearly effect is relevant, it can also be seen that the sub-thread enamel covered wire diameter of preferred embodiment of the present invention proposition is much smaller than existing from table 1
The square line length of side and the round wires diameter that technology uses so that using enamel-covered wire group can substantially reduce the Kelvin effect of copper cash with it is neighbouring
Effect, reduce the AC resistance of coil, reduce the loss of coil.
Two aspects of summary, the preferred embodiment of the present invention carry out further excellent to the line footpath of enamel covered wire with number of share of stock
Change, further to reduce the AC impedance ACR of coil, so as to realize higher system efficiency of transmission.In preferred embodiment
In, the line footpath of enamel covered wire 4 is 0.02~0.2mm, and every group of enamel-covered wire group 3 is twisted by 7 strands of enamel covered wires 4, such as Fig. 2 institutes
Show；The AC impedance ACR of coil now is reduced compared with prior art at most, can realize optimal system efficiency of transmission.
Following combination instantiation is by the wireless charging electric wire coil assembly of the preferred embodiment of the present invention and the nothing of prior art
The AC resistance ACR of line charge coil component is contrasted.
Embodiment one：
As shown in Fig. 2 being shaped as rectangle using two groups of enamel-covered wire groups 3 and around 10 circles (one layer), coiling, rectangle four edges fall
Fillet processing, coil inner rectangular size is 10mm*20mm, rounding radii 0.1mm；The conductor diameter of enamel covered wire 4 is
0.1mm, enamel-cover film thickness are 0.01mm (integral diameter 0.11mm), and number of share of stock is 7 strands；The external diameter of enamel-covered wire group 3 is 0.33mm,
Gapless, magnetic sheet are ferrite material (relative permeability 3300) between enamel-covered wire group 3, between circle and circle, and thickness is
0.1mm；For coil 1 by glue bonding on the surface of magnetic sheet 2, glue thickness is 0.02mm.
Comparative example one：
As shown in figure 3, the enamel-covered wire group in embodiment one is substituted with square copper cash, other conditions are constant；Wherein, square copper cash
The conductor length of side is 0.3mm, and enamel-cover film thickness is 0.03mm.
Comparative example two：
As shown in figure 4, the enamel-covered wire group in embodiment one is substituted with circular copper wire, other conditions are constant；Wherein, circular copper wire
Conductor diameter is 0.3mm, and enamel-cover film thickness is 0.03mm.
Wireless charging electric wire coil assembly in embodiment one, comparative example one, comparative example two is tested respectively, tested
As a result such as table 2.
Table 2
| Embodiment one | Comparative example one | Comparative example two | |
| L values (μ H) | 5.8 | 5.8 | 5.8 |
| DCR(mΩ) | 130 | 80 | 101 |
| ACR(100KHz,mΩ) | 131 | 97 | 121 |
| ACR(150KHz,mΩ) | 132 | 116 | 145 |
| ACR(200KHz,mΩ) | 133 | 141 | 175 |
| ACR(300KHz,mΩ) | 137 | 197 | 251 |
As shown in table 2, by the wireless charging electric wire coil assembly of the embodiment of the present invention one and the wireless charging electric wire of comparative example one, two
The inductance value and loss value (DCR, ACR) of coil assembly are contrasted, and conclusion is as follows：
Because the sectional area of conductor is different, the DCR of three is different, wherein the DCR of the coil of square copper wire winding is minimum, its
Secondary is circular copper wire, and enamel-covered wire group is maximum；And ACR increases with the increase of frequency, and square copper cash and the coil of circular copper wire coiling
The increased speed of ACR is faster than enamel-covered wire group, and this is small mainly due to enamel-covered wire group sub-thread line footpath, and Kelvin effect and kindred effect are not
Substantially.From the point of view of numerically, in 150KHz, the loop A CR of circular copper wire coiling alreadys exceed enamel-covered wire group, in 200KHz,
The loop A CR of square copper wire winding also has been over enamel-covered wire group；This shows, is proposed in 150KHz frequencies above using the present invention
Enamel-covered wire group replace existing circular copper wire or substituted in 200KHz frequencies above using enamel-covered wire group proposed by the present invention existing
The square copper cash having can obtain more low-loss coil block.The wireless charging electric wire coil assembly of the preferred embodiment of the present invention is being kept
In the case of original inductance value, ACR is lower, and coil Q values are higher, and then can obtain higher system efficiency of transmission.
Simultaneously as the enamel-covered wire group external diameter used is equal with the square copper cash length of side and circular copper wire diameter, above-mentioned three kinds of lines
The general thickness of coil assembly is consistent；Therefore, the wireless charging electric wire coil assembly of the preferred embodiment of the present invention and prior art phase
Than not only reducing the loss of coil, realizing higher efficiency of transmission；And maintain the thin of coil block in the prior art
Molded dimension.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For those skilled in the art, do not taking off
On the premise of from present inventive concept, some equivalent substitutes or obvious modification can also be made, and performance or purposes are identical, all should
When being considered as belonging to protection scope of the present invention.
Claims (9)
1. a kind of wireless charging electric wire coil assembly, including magnetic sheet and the coil that is arranged on magnetic sheet, it is characterised in that the coil by
At least two groups enamel-covered wire group coilings parallel with one another are formed, and the enamel-covered wire group is twisted by multiply enamel-covered wire, described in every group
Enamel-covered wire group has first end and the second end respectively, and the first end of enamel-covered wire group is connected together as described at least described in two groups
One lead end of coil, the second end of enamel-covered wire group is connected together as another lead of the coil at least described in two groups
End.
2. wireless charging electric wire coil assembly according to claim 1, it is characterised in that at least described in two groups enamel-covered wire group along
The magnetic sheet is radial parallel to be arranged and around one layer is fixed on the magnetic sheet.
3. wireless charging electric wire coil assembly according to claim 1, it is characterised in that at least enamel-covered wire group passes through described in two groups
Glue or adhesive tape are bonded on the magnetic sheet.
4. wireless charging electric wire coil assembly according to claim 1, it is characterised in that enamel-covered wire group described in every group and per share institute
State and enamel-cover film is wrapped up outside enamel-covered wire.
5. wireless charging electric wire coil assembly according to claim 1, it is characterised in that the cross section of the enamel-covered wire group is circle
Shape.
6. wireless charging electric wire coil assembly according to claim 1, it is characterised in that the cross section of the enamel-covered wire is circle
Shape.
7. wireless charging electric wire coil assembly according to claim 6, it is characterised in that the line footpath of the enamel-covered wire be 0.02~
0.2mm。
8. wireless charging electric wire coil assembly according to claim 1, it is characterised in that the enamel-covered wire group is by 7 strands of enamel-covered wires
It is twisted.
9. the wireless charging electric wire coil assembly according to any one of claim 1 to 8, it is characterised in that the magnetic sheet is soft magnetism
Material, thickness are 0.05~0.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711195358.4A CN107819362A (en) | 2017-11-24 | 2017-11-24 | A kind of wireless charging electric wire coil assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711195358.4A CN107819362A (en) | 2017-11-24 | 2017-11-24 | A kind of wireless charging electric wire coil assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107819362A true CN107819362A (en) | 2018-03-20 |
Family
ID=61610136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711195358.4A Pending CN107819362A (en) | 2017-11-24 | 2017-11-24 | A kind of wireless charging electric wire coil assembly |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565103A (en) * | 2018-04-11 | 2018-09-21 | 宁波微鹅电子科技有限公司 | Electric energy transmitting coil and radio energy transmitting terminal |
| CN109036803A (en) * | 2018-06-15 | 2018-12-18 | 上海安费诺永亿通讯电子有限公司 | Coil, wireless power transmitters and receivers, near-field communication device and electronic equipment |
| CN109038851A (en) * | 2018-08-02 | 2018-12-18 | 深圳顺络电子股份有限公司 | A kind of Wireless charging coil mould group |
| CN110763863A (en) * | 2019-11-19 | 2020-02-07 | 中国航空工业集团公司上海航空测控技术研究所 | Magnetoelectric rotating speed measuring device |
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| CN104682526A (en) * | 2015-01-31 | 2015-06-03 | 深圳市泰金田科技有限公司 | Energy conversion device for wireless charging of electric automobile |
| CN106560904A (en) * | 2015-09-29 | 2017-04-12 | 比亚迪股份有限公司 | Induction coil structure and wireless charging device |
| CN107068357A (en) * | 2017-06-15 | 2017-08-18 | 深圳市信维通信股份有限公司 | A kind of induction coil structure and preparation method for wireless charging device |
| TW201738910A (en) * | 2016-04-28 | 2017-11-01 | 乾坤科技股份有限公司 | Wireless charging coil and method for producing a wireless charging coil |
| CN207638413U (en) * | 2017-11-24 | 2018-07-20 | 深圳顺络电子股份有限公司 | A kind of wireless charging electric wire coil assembly |
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2017
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| US20130181668A1 (en) * | 2010-12-01 | 2013-07-18 | Panasonic Corporation | Non-contact charging module and non-contact charging instrument |
| CN104682526A (en) * | 2015-01-31 | 2015-06-03 | 深圳市泰金田科技有限公司 | Energy conversion device for wireless charging of electric automobile |
| CN106560904A (en) * | 2015-09-29 | 2017-04-12 | 比亚迪股份有限公司 | Induction coil structure and wireless charging device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565103A (en) * | 2018-04-11 | 2018-09-21 | 宁波微鹅电子科技有限公司 | Electric energy transmitting coil and radio energy transmitting terminal |
| CN109036803A (en) * | 2018-06-15 | 2018-12-18 | 上海安费诺永亿通讯电子有限公司 | Coil, wireless power transmitters and receivers, near-field communication device and electronic equipment |
| CN109038851A (en) * | 2018-08-02 | 2018-12-18 | 深圳顺络电子股份有限公司 | A kind of Wireless charging coil mould group |
| CN110763863A (en) * | 2019-11-19 | 2020-02-07 | 中国航空工业集团公司上海航空测控技术研究所 | Magnetoelectric rotating speed measuring device |
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Effective date of registration: 20201106 Address after: Building A5, No.28 Tangqing West Road, Shitan Pu, Tangxia Town, Dongguan City, Guangdong Province 523710 Applicant after: Dongguan shunluo Electronics Co.,Ltd. Address before: Shenzhen City, Guangdong province Baoan District 518110 sightseeing road s Fuyuan sunlord Industrial Park Applicant before: Shenzhen Sunlord Electronics Co.,Ltd. |
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Application publication date: 20180320 |