CN109841389A - A kind of parallel winding of multiple coils coil panel for magnetic coupling wireless power transmission - Google Patents
A kind of parallel winding of multiple coils coil panel for magnetic coupling wireless power transmission Download PDFInfo
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- CN109841389A CN109841389A CN201711198434.7A CN201711198434A CN109841389A CN 109841389 A CN109841389 A CN 109841389A CN 201711198434 A CN201711198434 A CN 201711198434A CN 109841389 A CN109841389 A CN 109841389A
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Abstract
The present invention relates to the components such as a kind of parallel winding of multiple coils coil panel for magnetic coupling wireless power transmission, including coupling coil, high-frequency soft magnetic body, shielding aluminium sheet.Coupling coil is plane, by multiple conducting wires closely and around forming, can be unicoil or multi-coil.When for unicoil, and around multiple conducting wires rise around point and eventually around point, rotational symmetry is distributed in coil plane, i.e., the single coil that is coiled into of each wire has rotational symmetry, and inductance having the same and resistance value, directly it is in parallel then can balanced each wire electric current.When for multi-coil, the circle segment of each coil of the multi-coil is constituted, in the plane for being distributed in multi-coil of the center rotational symmetry of entire coupling coil.The present invention realizes the Optimal coverage width of coil and multi-thread close and around can greatly improve the coefficient of coup, reduce Occupational exposure to magnetic fields under the premise of meeting current density；It can also arbitrarily adjust coil turn (can be non-integer), obtain accurate inductance.
Description
Technical field
The present invention relates to a kind of parallel winding of multiple coils coil panels for magnetic coupling wireless power transmission, belong to power supply/radio
It can transmission technique field.
Background technique
In recent years, wireless power transmission (wireless power transfer, WPT) technology is by more and more extensive
Concern.According to transporting mechanism difference, there are many forms for wireless power transmission.More mature radio energy passes in current electric field
Transferring technology is magnetic field coupling-type；Magnetic field coupling-type is divided into magnetic inductive and two kinds of magnetic resonance again, be all by transmitting coil and
Alternation coupled magnetic field between receiving coil realizes electric energy transmitting.
Wireless charging alliance (WPC) establishment in 2008, and the Qi standard based on magnetic induction is released in the world.2015
A4PW and PMA is merged into found a state border wireless charging industry alliance (AirFuel Alliance), intends compatible magnetic inductive and magnetic is total
The standard of vibration formula.So far, commercialization paces are accelerated for the wireless power transmission technology of middle low power electronic product.2017
SAE (Society of Automotive Engineers) has issued " light-duty plug-in type/electricity of SAE J2954_August 2017
Wireless power transmission, automatic charging and the calibration method of motor-car ".China also started to formulate electric car wireless charging in 2017
National standard, formally pulled open the prelude of electric car wireless charging industrialization process.
Magnetic field coupling-type radio energy transmission system mainly by (driving magnetic field) primary side device, magnetic coupling and (connects
Receive energy) part such as secondary side device forms.Wherein, magnetic coupling (including coupling coil physical structure and resonance compensation electricity
Road topology) it is the most critical part that system realizes remote electric energy transmission, directly affect the power and efficiency of Transmission system.
According to the description (Section 8 of SAE J2954_August 2017) of SAE J2954, coupling coil can be designed to
Various topological structures: non-polarised, polarized or multi-coil is topological.Coil panel passes through suitably using ferrite or aluminium backing come really
It protects magnetic flux and exists only in side.1, non-polarized topology has a pole at the center of coil panel, has in exterior circumferential opposite
Pole can lead to magnetic flux and leave coil disk center and return to its all external margin and form closed loop；It is received when being used as
It is mainly sensitive to the vertical magnetic field in space when coil.2, polarization topology has the pole N and the pole S at the both ends of coil panel, can lead to magnetic
Flux forms closed loop from the pole N to the pole S；It is mainly sensitive to horizontal magnetic field when being used as receiving coil.3, multi-coil topology
It usually combines polarization with non-polarized two kinds of structures, and uses decoupling coil, polarization can be generated when as transmitting terminal
Or non-polarized field, and as receiving end when captures horizontal magnetic field and vertical magnetic field naturally.SAE J2954, which is enumerated, recommends five kinds
Coil topology structure: (a) round/rectangular non-polarized；(b) em polarization；(c) DD polarizes；(d) multi-coil DDQ；(e) multi-coil is double
Pole.In addition, what the possible yes or no of the transmitting coil and receiving coil of radio energy transmission system was produced by the same manufacturer；
For the test evaluation for ensuring interoperability, defined in the annex of SAE J2954 all applicable master-receiving coils (M-VA) and
With reference to the machinery and electrical design specification of-transmitting coil (R-GAs).
In coil topology structure, mechanically and electrically design specification and other existing designs that SAE recommends, coil
Conducting wire mostly uses solid conductor.This single conductor coiling design is not able to satisfy line in certain number of turns and line footpath
Enclose the requirement of Optimal coverage width and close coiling.The number of turns determines that line footpath is determined by current requirements by inductance requirement；Closely
Coiling can be reduced leakage field and conform better to manufacture craft, and Optimal coverage width is for high coupling coefficient.Improve magnetic coupling
The coefficient of coup of coil is of great significance, and not only increases electric energy efficiency of transmission and reduces Occupational exposure to magnetic fields, this is magnetic coupling
Close one of the critical demands that wireless power transmission technical industryization is promoted.In order to simultaneously meet Optimal coverage width and tightly around
Line, proposes the technology path of parallel winding of multiple coils, but existing parallel winding of multiple coils is all that multiple conducting wires rise around point in same place and end
Around point also in same place, the big situation of inductance small there have been the inductance of inner ring conducting wire and outer ring conducting wire in this way is this
The difference of inductance leads to the current-unbalance that different conductor is flowed through after parallel connection.In order to compensate for the difference of this inductance, and go out
The design scheme with outer ring conductor in parallel again is showed after inner ring conducting wire series compensation inductance, but which increase cost, weight, losses
And design complexity.
As it can be seen that under the premise of meeting interoperability, optimization design coupling coil is magnetic coupling wireless power transmission technology
Crucial one of core topic.
Summary of the invention
The object of the present invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of for magnetic coupling wireless power transmission
Parallel winding of multiple coils coil panel, under the premise of meeting inductance and current density, realize Optimal coverage width and it is multi-thread it is close simultaneously
Around achieving the purpose that improve the coefficient of coup, reduce Occupational exposure to magnetic fields and balanced current in wire.
Technical scheme is as follows:
A kind of parallel winding of multiple coils coil panel for magnetic coupling wireless power transmission, including coupling coil, high-frequency soft magnetic body, screen
Cover the components such as aluminium sheet.Coupling coil can be unicoil and be also possible to multi-coil for plane and by multiple conducting wires and around forming
(can be single output when as receiving end and be also possible to multi output)；High-frequency soft magnetic body is rectangle that is whole or being spliced
(or round or polygon) tabular magnetic sheet；Shield the pure aluminum plate that aluminium sheet is 1mm left and right thickness.
The one side of high-frequency soft magnetic body is close to coupling coil, and another side is close to shielding aluminium sheet.Coupling coil is for exciting or catching
Magnetic field is obtained to transmit electric energy；High-frequency soft magnetic body is for magnetic flux and improves the coefficient of coup, while ensuring that magnetic field exists only in group
The side of part；Shielding aluminium sheet is for reducing Occupational exposure to magnetic fields.
It is characterized by: 1, when coupling coil be unicoil when, the monocoil multiple conducting wires of coiling rise around point and eventually around
Point, rotational symmetry are distributed in coil plane, and center of rotational symmetry is the center of coupling coil, then by each wire institute
The single coils from parallel connection of coils being coiled into is a unicoil.In this way and around the single coil that is coiled into of each wire between also there is rotation
Turn symmetry, it, can electricity in naturally balanced each wire after directly in parallel thus inductance having the same and resistance value
Stream.2, when coupling coil is multi-coil, the circle segment of each coil of the multi-coil is constituted, being distributed in for rotational symmetry is more
In the plane of coil, center of rotational symmetry is the center of entire coupling coil；If each coil of the multi-coil be it is multi-thread simultaneously
Around then the multiple conducting wires of each coil rise around point and eventually around point, being distributed in the center rotational symmetry of each coil respectively
It is then in parallel to become each coil in each coil plane.
The design procedure that the coupling coil uses is: firstly, selecting the Optimal coverage of coil wide to reach high coupling coefficient
It spends (i.e. the distance between coil inner side edge and outer side edges)；Secondly, being calculated in Optimal coverage width according to required inductance
The number of turns (can be non-integer) of coil；Again, according to required current density, the line footpath and core number of share of stock of litz wire are calculated
(being determined by equivalent cross-sectional area)；Finally, according to conducting wire it is close around requirement, required litz wire is divided into more.Calculation formula
Are as follows: Optimal coverage width ÷ the number of turns=diameter of wire × conducting wire radical.Divide litz wire equally and optimize and revise diameter of wire, so that leading
Line radical is integer, thus with technical solution of the present invention realize coupling coil Optimal coverage width and it is multi-thread close and around.
The present invention has the following advantages compared with prior art:
1. realizing the Optimal coverage width of coil and multi-thread close and around can greatly improve the coefficient of coup, reduce electromagnetism
Exposure.
2. can arbitrarily adjust coil turn (can be non-integer) in Optimal coverage width, obtain accurate inductance
Amount.
3. and around more coils between there is rotational symmetry, it is in parallel thus inductance having the same and resistance value
Electric current that afterwards can naturally in balanced each wire, can also eliminate non-integer the number of turns to the adverse effect of electric property.
Detailed description of the invention
Fig. 1 is a kind of three lines for magnetic coupling wireless power transmission and around unicoil disk schematic diagram.
Fig. 2 is a kind of Double-wire parallel wound unicoil disk schematic diagram for magnetic coupling wireless power transmission.
Fig. 3 is a kind of four lines for magnetic coupling wireless power transmission and around four coil panel schematic diagrames.
Fig. 4 is a kind of four lines for magnetic coupling wireless power transmission and around twin coil disk schematic diagram.
In figure, 1 --- coupling coil, 2 --- high-frequency soft magnetic body, 3 --- shielding aluminium sheet；1-1 --- it rises around point, 1-
2 --- eventually around point.
Specific embodiment
The present invention is described in detail with most preferred embodiment with reference to the accompanying drawing.
As shown in Figure 1 to 4, a kind of parallel winding of multiple coils coil panel for magnetic coupling wireless power transmission, including coupling line
Enclose the components such as (1), high-frequency soft magnetic body (2), shielding aluminium sheet (3).Coupling coil (1) be plane and by multiple conducting wires and around and
At can be unicoil and be also possible to multi-coil (can be when as receiving end single output be also possible to multi output)；High frequency is soft
Magnet (2) is rectangle that is whole or being spliced (or round or polygon) tabular magnetic sheet；Shielding aluminium sheet (3) is 1mm left
The pure aluminum plate of right thickness.
The one side of high-frequency soft magnetic body (2) is close to coupling coil (1), and another side is close to shielding aluminium sheet (3).Coupling coil (1)
For excitation or capture magnetic field to transmit electric energy；High-frequency soft magnetic body (2) is for magnetic flux and improves the coefficient of coup, ensures simultaneously
Magnetic field exists only in the side of component；Shielding aluminium sheet (3) is for reducing Occupational exposure to magnetic fields.
As shown in Figure 1 and Figure 2, when coupling coil (1) is unicoil, the monocoil multiple conducting wires of coiling are risen around point (1-
1) and eventually around point (1-2), rotational symmetry is distributed in coil plane, and center of rotational symmetry is the center of coupling coil (1),
Then single coils from parallel connection of coils each wire being coiled into is a unicoil.In this way and around each wire be coiled into it is single
Also there is rotational symmetry between coil, thus inductance having the same and resistance value, it can naturally directly after parallel connection
Electric current in each wire that weighs.
As shown in Figure 3, Figure 4, when coupling coil (1) is multi-coil, the circular portion of each coil of the multi-coil is constituted
Point, rotational symmetry is distributed in the plane of multi-coil, and center of rotational symmetry is the center of entire coupling coil (1)；If should
Each coil of multi-coil is parallel winding of multiple coils, then the multiple conducting wires of each coil rise around point (1-1) and eventually around point (1-2), is divided
Not being distributed in each coil plane with the center rotational symmetry of each coil, it is then in parallel to become each coil.
The design procedure that the coupling coil uses is: firstly, selecting the Optimal coverage of coil wide to reach high coupling coefficient
It spends (i.e. the distance between coil inner side edge and outer side edges)；Secondly, being calculated in Optimal coverage width according to required inductance
The number of turns (can be non-integer) of coil；Again, according to required current density, the line footpath and core number of share of stock of litz wire are calculated
(being determined by equivalent cross-sectional area)；Finally, according to conducting wire it is close around requirement, required litz wire is divided into more.Calculation formula
Are as follows: Optimal coverage width ÷ the number of turns=diameter of wire × conducting wire radical.Divide litz wire equally and optimize and revise diameter of wire, so that leading
Line radical is integer, thus with technical solution of the present invention realize coupling coil Optimal coverage width and it is multi-thread close and around.
Claims (1)
1. a kind of parallel winding of multiple coils coil panel for magnetic coupling wireless power transmission, including coupling coil (1), high-frequency soft magnetic body
(2), components such as aluminium sheet (3) are shielded；The one side of high-frequency soft magnetic body (2) is close to coupling coil (1), and another side is close to shielding aluminium sheet
(3)；Shield the pure aluminum plate that aluminium sheet (3) are 1mm left and right thickness, high-frequency soft magnetic body (2) be rectangle that is whole or being spliced (or
Round or polygon) tabular magnetic sheet, coupling coil (1) is plane and by multiple conducting wires and around forming, and can be unicoil
It is also possible to multi-coil (can be single output when as receiving end and be also possible to multi output)；
It is characterized by: the monocoil multiple conducting wires of coiling rise around point (1-1) and end when coupling coil (1) is unicoil
Around point (1-2), rotational symmetry is distributed in coil plane, and center of rotational symmetry is the center of coupling coil (1), so simultaneously
Around the single coil that is coiled into of each wire between also there is rotational symmetry, the solid wire for being then coiled into each wire
Circle in parallel is a unicoil；When coupling coil (1) is multi-coil, the circle segment of each coil of the multi-coil is constituted,
Rotational symmetry is distributed in the plane of multi-coil, and center of rotational symmetry is the center of entire coupling coil (1)；If this is multi-thread
Circle each coil be parallel winding of multiple coils, then the multiple conducting wires of each coil rise around point (1-1) and end around point (1-2), respectively with
The center rotational symmetry of each coil is distributed in each coil plane, then in parallel to become each coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711198434.7A CN109841389A (en) | 2017-11-25 | 2017-11-25 | A kind of parallel winding of multiple coils coil panel for magnetic coupling wireless power transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711198434.7A CN109841389A (en) | 2017-11-25 | 2017-11-25 | A kind of parallel winding of multiple coils coil panel for magnetic coupling wireless power transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109841389A true CN109841389A (en) | 2019-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711198434.7A Pending CN109841389A (en) | 2017-11-25 | 2017-11-25 | A kind of parallel winding of multiple coils coil panel for magnetic coupling wireless power transmission |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491159A (en) * | 2020-11-17 | 2021-03-12 | 哈尔滨工业大学 | Circuit for balancing current among three parallel-wound wireless power transmission coil strands and parameter design method thereof |
| CN112953023A (en) * | 2021-03-17 | 2021-06-11 | 三峡大学 | Asymmetric LD wireless power transmission coil structure and application thereof |
| CN113009254A (en) * | 2021-02-24 | 2021-06-22 | 中国人民解放军陆军工程大学 | High-power high-linearity current injection probe |
-
2017
- 2017-11-25 CN CN201711198434.7A patent/CN109841389A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491159A (en) * | 2020-11-17 | 2021-03-12 | 哈尔滨工业大学 | Circuit for balancing current among three parallel-wound wireless power transmission coil strands and parameter design method thereof |
| CN113009254A (en) * | 2021-02-24 | 2021-06-22 | 中国人民解放军陆军工程大学 | High-power high-linearity current injection probe |
| CN112953023A (en) * | 2021-03-17 | 2021-06-11 | 三峡大学 | Asymmetric LD wireless power transmission coil structure and application thereof |
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