CN109831002A - The coil of magnetic resonance wireless charging and the method for improving efficiency when distance increases - Google Patents
The coil of magnetic resonance wireless charging and the method for improving efficiency when distance increases Download PDFInfo
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- CN109831002A CN109831002A CN201910090921.4A CN201910090921A CN109831002A CN 109831002 A CN109831002 A CN 109831002A CN 201910090921 A CN201910090921 A CN 201910090921A CN 109831002 A CN109831002 A CN 109831002A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011810 insulating material Substances 0.000 claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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Abstract
The invention belongs to wireless charging fields.The present invention provides a kind of coils of magnetic resonance wireless charging, receive in the gap between end-coil and the line and line that emit end-coil and are provided with insulating material layer.The present invention also provides the methods for improving efficiency when distance increases: step S01: calculating coil inductance according to the transmission power size of magnetic resonance wireless charging；Step S02: in coiling, insulating material layer is inserted between the line and line of coil；Step S03: measuring coil inductance using vector network analyzer, carries out the number of turns correction to the coil of coiling, step S04 starts wireless charging.The coil of magnetic resonance wireless charging provided by the invention and the method for improving efficiency when distance increases, when Ullage is from 4cm is increased to from 3cm, efficiency decaying is slow, and efficiency is 80% or more.So the method for increasing area coil indirectly by using megohmite insulant is inserted between line online, has achieved the purpose that improve efficiency of transmission.
Description
Technical field
The invention belongs to wireless charging field, it is related to a kind of coil of magnetic resonance wireless charging and improves distance increase timeliness
The method of rate.
Background technique
When high-power in using mr techniques transmission, such as transmission 300W power, when efficiency of transmission is reduced from 80%
To 70% it is even lower when, power can excess loss at least 30W or more, cause unnecessary waste.It was found that, working as system
Efficiency drop to 70% it is even lower when, it is serious to will lead to the fever of related component, works long hours, is unfavorable for the stabilization of system
Property, so it is high-power in transmission, it needs to keep at least 80% even higher efficiency.
Magnetic resonance wireless charging technology is usually fixed every Ullage from charging, but is directed to certain special uses
Scene needs to realize in a certain range the wireless charging of (Centimeter Level), but with the increase of distance, wireless charging efficiency meeting again
It inevitably reduces, especially when distance breaks through some critical point, efficiency decaying can be very rapid.So for reality
The centainly powerful high efficiency wireless transmission in (Centimeter Level) in empty range is realized now, needs to propose new method.
Magnetic field strength and area coil are proportional, in determination power output, in the case where coil inductance is constant,
By increasing transmitting coil magnetic field strength, slows down distance and increase bring field decay, to improve efficiency of transmission.Increase transmitting
The method of coil magnetic field intensity has two: increasing emission current or increases area coil.Increasing emission current means efficiency
Reduction, it is undesirable, can only be increase coil surface area, if increase area coil, it is meant that increase the number of turns of coil, then
Coil inductance will be changed, destroy original matching condition, therefore output power changes.
Summary of the invention
1, technical problem to be solved:
In magnetic resonance wireless transmission, with the increase of distance, efficiency decaying is serious.By emission current, efficiency is reduced, and is increased
Big coil surface area, can change coil inductance, destroy original matching condition, therefore output power changes.
2, technical solution:
In order to solve problem above, the present invention provides a kind of coil of magnetic resonance wireless charging, including coil body,
The coil body includes transmitting end-coil and receives end-coil, is set in the gap between the line and line of the coil body
It is equipped with insulating material layer.
The insulating material layer (2) with a thickness of according to increase distance in the case of, efficiency highest under efficiency attenuation
When thickness.
The efficiency is not less than 80%.
The material of the insulating material layer is the combination of one or more of nylon, rubber, plastics.
The present invention also provides the methods for using the coil of the magnetic resonance wireless charging to improve efficiency when distance increases:
Step S01: coil inductance is calculated according to the transmission power size of magnetic resonance wireless charging；Step S02: in coiling transmitting terminal
When coil and reception end-coil, the insulating material layer (2) of same thickness is inserted between the line and line of coil；Step S03: it uses
Vector network analyzer measures coil inductance, and the transmitting end-coil and reception end-coil to coiling carry out the number of turns correction, described
Transmitting end-coil with receive the number of turns of end-coil it is identical；Step S04: the prepared transmitting of step S01- step S03 is used
End-coil and reception end-coil carry out wireless charging.
3, the utility model has the advantages that
The coil of magnetic resonance wireless charging provided by the invention and the method for improving efficiency when distance increases, every Ullage from from
When 3cm increases to 4cm, efficiency decaying is slow, and efficiency is 80% or more.So being inserted between line by using online exhausted
The method that edge substance increases area coil indirectly has achieved the purpose that improve efficiency of transmission.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Below by drawings and examples, the present invention is described in detail.
As shown in Figure 1, the present invention provides a kind of coil of magnetic resonance wireless charging, including coil body 1, the line
It encloses ontology to include transmitting end-coil and receive end-coil, be provided in the gap between the line and line of the coil body 1 absolutely
Edge material layer 2.
Certain thickness insulating material layer 2 is inserted between line online, thus increase the interval between line and line, it is indirectly real
The number of turns that coiling is reduced while now increasing area coil, to not change coil inductance.
The thickness of insulating material layer 2 is generally unsuitable wide, and the wide leakage field that will lead to coil is serious, influences efficiency instead,
So the insulating material layer 2 with a thickness of in the case of according to distance is increased, thickness under attenuation when efficiency highest.
The efficiency is not less than 80%.
The material of the insulating material layer 2 is the combination of one or more of nylon, rubber, plastics.
The present invention also provides the methods for using the coil of the magnetic resonance wireless charging to improve efficiency when distance increases:
Step S01: coil inductance is calculated according to the transmission power size of magnetic resonance wireless charging；Step S02: in coiling transmitting terminal
When coil and reception end-coil, the insulating material layer (2) of same thickness is inserted between the line and line of coil；Step S03: it uses
Vector network analyzer measures coil inductance, and the transmitting end-coil and reception end-coil to coiling carry out the number of turns correction, described
Transmitting end-coil with receive the number of turns of end-coil it is identical；Step S04: the prepared transmitting of step S01- step S03 is used
End-coil and reception end-coil carry out wireless charging.
The optimum thickness of the insulating material layer 2 determines method are as follows: transmitting terminal end-coil and reception end-coil are chosen absolutely
Edge material layer 2 is of uniform thickness, and from width is too narrow to, records the efficiency value after decaying under each thickness, exhausted when taking optimum efficiency value
The thickness with a thickness of insulating material layer 2 in step S02 of edge material layer (2).
In fact, there is no need to continue growing the thickness of insulating material layer 2, being taken at this time when efficiency value reaches 80%
With a thickness of the thickness of insulating material layer 2 in step S02.
In step S03, if to measure coil inductance bigger than normal for vector network analyzer, illustrate that number of turns is on the high side, reduce
One circle, re-test illustrate that the number of turns is on the low side, increase by a circle, thus according to actual test feelings as a result, less than normal if measuring inductance value
Condition adjustment actual inductance value is to achieve the purpose that target inductance value.
Embodiment 1
First group of coil is taken, coil does not increase insulating material layer between line online at this time.
Remove second group of coil, coil is to obtain transmitting end-coil by step S01-S03 and receive end-coil, online and line
Between be inserted into insulating material layer, insulating material layer with a thickness of 1mm.
The parameter such as following table of first group of coil and second group of coil；
Xx item argument: 29.4V/8A-10A is exported respectively with first group of coil, and when empty 1-4cm, efficiency is as follows:
, it is apparent that efficiency attenuation ratio is very fast when Ullage is from 4cm is increased to from 3cm from above data.
Xx item argument: 29.4V/8A-10A is exported respectively with second group of coil, and when empty 1-4cm, efficiency is as follows:
From above data, it is apparent that when Ullage is from 4cm is increased to from 3cm, efficiency decaying is slow, hence it is evident that
Better than first group of coil and efficiency is 80% or more.So being increased indirectly by using megohmite insulant is inserted between line online
The method of area coil has achieved the purpose that improve efficiency of transmission.
Although the present invention has been described by way of example and in terms of the preferred embodiments, they be not it is for the purpose of limiting the invention, it is any ripe
This those skilled in the art is practised, without departing from the spirit and scope of the invention, can make various changes or retouch from working as, therefore guarantor of the invention
Shield range should be subject to what claims hereof protection scope was defined.
Claims (8)
1. a kind of coil of magnetic resonance wireless charging, including coil body (1), the coil body (1) includes transmitting end line
Circle and reception end-coil, it is characterised in that: be provided with megohmite insulant in the gap between the line and line of the coil body (1)
Layer (2).
2. the coil of magnetic resonance wireless charging as described in claim 1, it is characterised in that: the insulating material layer (2)
Thickness in the case of according to distance is increased, under efficiency attenuation when efficiency highest.
3. the coil of magnetic resonance wireless charging as claimed in claim 2, it is characterised in that: the efficiency is greater than 80%.
4. the transmitting coil of the magnetic resonance wireless charging as described in claim 1-3 any claim, it is characterised in that: described
Insulating material layer (2) material be one or more of nylon, rubber, plastics combination.
Increase 5. a kind of coil using the magnetic resonance wireless charging as described in claim 1-4 any claim improves distance
When efficiency method: coil inductance step S01: is calculated according to the transmission power size of magnetic resonance wireless charging；Step
S02: in coiling transmitting end-coil and reception end-coil, the insulating material layer of same thickness is inserted between the line and line of coil
(2)；Step S03: measuring coil inductance using vector network analyzer, to the transmitting end-coil of coiling and receive end-coil into
Row the number of turns is corrected, and the transmitting end-coil is identical with the number of turns of end-coil is received；Step S04: step S01- step S03 is used
Prepared transmitting end-coil and reception end-coil carry out wireless charging.
6. method as claimed in claim 5, it is characterised in that: the optimum thickness of the insulating material layer (2) determines method
Are as follows: the thickness of insulating material layer is chosen from width is too narrow to, and the efficiency value after decaying under each thickness is recorded, when taking optimum efficiency value
The thickness with a thickness of insulating material layer (2) in step S02 of insulating material layer (2), transmitting end-coil and reception end-coil are chosen
Insulating material layer thickness it is identical.
7. method as claimed in claim 5, it is characterised in that: the optimum thickness of the insulating material layer (2) determines method
Are as follows: the thickness of insulating material layer is chosen from width is too narrow to, and the efficiency value after decaying under each thickness is recorded, when efficiency value is greater than
When 80%, the thickness with a thickness of insulating material layer in step 02 (2) at this time, transmitting end-coil and receive end-coil choose it is exhausted
The thickness of edge material layer is identical.
8. method according to claim 6 or 7, it is characterised in that: the thickness for choosing insulating material layer (2) is opened from 1mm thickness
Begin, each increased amplitude is 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910090921.4A CN109831002A (en) | 2019-01-30 | 2019-01-30 | The coil of magnetic resonance wireless charging and the method for improving efficiency when distance increases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910090921.4A CN109831002A (en) | 2019-01-30 | 2019-01-30 | The coil of magnetic resonance wireless charging and the method for improving efficiency when distance increases |
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| CN109831002A true CN109831002A (en) | 2019-05-31 |
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| CN201910090921.4A Pending CN109831002A (en) | 2019-01-30 | 2019-01-30 | The coil of magnetic resonance wireless charging and the method for improving efficiency when distance increases |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611210A (en) * | 2012-03-27 | 2012-07-25 | 东南大学 | Design method of disc resonator in wireless power transmission system |
| JP2014103147A (en) * | 2012-11-16 | 2014-06-05 | Panasonic Corp | Collective wires, power transmission device using the same, electronic apparatus and wireless power transmission system |
| CN105845404A (en) * | 2015-01-15 | 2016-08-10 | 宁波微鹅电子科技有限公司 | Transmitting coil structure with high-quality factor and winding method thereof |
| CN107452483A (en) * | 2016-04-28 | 2017-12-08 | 乾坤科技股份有限公司 | Wireless charging coil and the method for making Wireless charging coil |
| CN108028127A (en) * | 2015-09-24 | 2018-05-11 | 富士机械制造株式会社 | Non-contact power coil and contactless power supply system |
| 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 |
| CN208271701U (en) * | 2018-03-28 | 2018-12-21 | 深圳市艺感科技有限公司 | Isolated lattice coil |
-
2019
- 2019-01-30 CN CN201910090921.4A patent/CN109831002A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611210A (en) * | 2012-03-27 | 2012-07-25 | 东南大学 | Design method of disc resonator in wireless power transmission system |
| JP2014103147A (en) * | 2012-11-16 | 2014-06-05 | Panasonic Corp | Collective wires, power transmission device using the same, electronic apparatus and wireless power transmission system |
| CN105845404A (en) * | 2015-01-15 | 2016-08-10 | 宁波微鹅电子科技有限公司 | Transmitting coil structure with high-quality factor and winding method thereof |
| CN108028127A (en) * | 2015-09-24 | 2018-05-11 | 富士机械制造株式会社 | Non-contact power coil and contactless power supply system |
| CN107452483A (en) * | 2016-04-28 | 2017-12-08 | 乾坤科技股份有限公司 | Wireless charging coil and the method for making Wireless charging coil |
| CN208271701U (en) * | 2018-03-28 | 2018-12-21 | 深圳市艺感科技有限公司 | Isolated lattice coil |
| 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 |
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Application publication date: 20190531 |