CN112564301A - Cross coupling suppression structure and method in guide rail type wireless power transmission system - Google Patents
Cross coupling suppression structure and method in guide rail type wireless power transmission system Download PDFInfo
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- CN112564301A CN112564301A CN202011446351.7A CN202011446351A CN112564301A CN 112564301 A CN112564301 A CN 112564301A CN 202011446351 A CN202011446351 A CN 202011446351A CN 112564301 A CN112564301 A CN 112564301A
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- 238000006880 cross-coupling reaction Methods 0.000 title claims abstract description 29
- 230000005540 biological transmission Effects 0.000 title claims abstract description 27
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- 230000008878 coupling Effects 0.000 claims abstract description 12
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- 230000001808 coupling effect Effects 0.000 claims abstract description 6
- 238000004088 simulation Methods 0.000 claims description 5
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- 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
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- 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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
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Abstract
The invention relates to the technical field of wireless power transmission, and particularly discloses a cross coupling suppression structure and a method in a guide rail type wireless power transmission system.A multi-section guide rail type wireless energy transmitting coil structure is adopted at an energy transmitting end, a plurality of wireless energy transmitting coils are sequentially and horizontally arranged along the length direction, and the current direction is in the same phase; an auxiliary coil is arranged in each wireless energy transmitting coil, the current direction of the auxiliary coil and the current direction of the corresponding wireless energy transmitting coil are also in the same phase, and the coupling effect between the auxiliary coil and the wireless energy transmitting coil is opposite to that of the two adjacent sections of wireless energy transmitting coils. The effect is as follows: a compensation coil is connected in series inside each stage of transmitting coil, and mutual coupling caused by too close distance of the transmitting coils is counteracted by introducing additional magnetic field coupling, so that cross coupling is eliminated, system performance is improved, and the method can also be applied to a static wireless charging system.
Description
Technical Field
The invention relates to the technical field of wireless power transmission, in particular to a cross coupling suppression structure and a cross coupling suppression method in a guide rail type wireless power transmission system.
Background
The wireless charging technology has the advantages of flexibility, reliability, safety and the like. The method is more and more widely applied to the fields of unmanned aerial vehicles, household appliances, electric automobiles and the like. In the application occasion of multistage guide tracked developments wireless charging, like electric automobile, AGV, the wireless charging system who patrols and examines the robot, owing to be relatively close apart from between the multistage transmission guide rail, often there is cross coupling. The presence of cross-coupling not only complicates system analysis, but also reduces system coupling efficiency and frequency stability.
However, in the prior art, methods for researching cross decoupling between multi-stage transmitting guide rails are relatively few.
Disclosure of Invention
Aiming at the problem of cross coupling of a multistage guide rail type dynamic wireless electric energy transmission system, the invention provides a mode of serially connecting a compensation coil in each stage of transmitting coil, and mutual coupling caused by too close distance of the transmitting coils is counteracted by introducing additional magnetic field coupling, so that the cross coupling is eliminated, and the system performance is improved.
In order to achieve the above object, the present invention first provides a cross-coupling suppression structure in a rail-type wireless power transmission system, and the specific technical solution is as follows:
the utility model provides a cross coupling of guide tracked wireless power transmission system restraines structure which the key lies in: the energy transmitting end adopts a multi-section guide rail type wireless energy transmitting coil structure, a plurality of wireless energy transmitting coils are sequentially and horizontally arranged along the length direction, and the current direction is in the same phase arrangement;
an auxiliary coil is arranged in each wireless energy transmitting coil, the current direction of the auxiliary coil and the current direction of the corresponding wireless energy transmitting coil are also in the same phase, and the coupling effect between the auxiliary coil and the wireless energy transmitting coil is opposite to that of the two adjacent sections of wireless energy transmitting coils.
Optionally, each wireless energy transmitting coil is wound into a rectangular coil structure, and each auxiliary coil is located in the middle of the corresponding wireless energy transmitting coil.
Optionally, each of the auxiliary coils is connected in series with a corresponding segment of the wireless energy transmitting coil.
Optionally, each auxiliary coil and the corresponding wireless energy transmitting coil are in the same plane, and a coil blank area is reserved between the auxiliary coil and the corresponding wireless energy transmitting coil.
Optionally, each section of the guide rail type wireless energy transmitting coil has the same structure, and the distance between two adjacent sections of the guide rail type wireless energy transmitting coils is the same.
Optionally, each auxiliary coil and the corresponding section of wireless energy transmitting coil are formed by winding the same litz wire on the same plane.
Based on the structure, the invention also provides a cross coupling suppression method in the guide rail type wireless power transmission system, which suppresses the coupling influence between two adjacent sections of energy transmitting coils by serially connecting an auxiliary coil in the middle of each section of wireless energy transmitting coil. The method comprises the following steps:
s1: setting the size and the number of turns of the wireless energy transmitting coils and the distance between two adjacent wireless energy transmitting coils according to an application scene, and calculating the mutual inductance between the two adjacent wireless energy transmitting coils through simulation;
s2: selecting the initial size of the auxiliary coil according to the width of the wireless energy transmitting coil;
s3: setting a decoupling range according to an application scene;
s4: simulating to calculate whether the mutual inductance of the transmitting coil and the auxiliary coil reaches a preset decoupling range, and if not, changing the mutual inductance value by sequentially increasing the turns of the auxiliary coil; if so, determining the parameters of the auxiliary coil according to the final size and the number of turns;
s5: and winding each section of the guide rail type wireless energy transmitting coil structure according to the size and the number of turns of the wireless energy transmitting coil set in the step S1 and the size and the number of turns of the auxiliary coil determined in the step S4.
Optionally, in step S3, a ratio of the decoupling range of the auxiliary coil in the first two segments of wireless energy transmitting coils to a corresponding boundary value of the decoupling range of the auxiliary coil in the non-first two segments of wireless energy transmitting coils is 1: 2.
The invention has the following remarkable effects:
(1) the invention provides a mode of serially connecting a compensation coil in each stage of transmitting coil, and the mutual coupling caused by too close distance of the transmitting coils is counteracted by introducing additional magnetic field coupling, so that the cross coupling is eliminated, and the system performance is improved.
(2) The cross decoupling method can be also applied to a static wireless charging system to realize the cross decoupling of a plurality of transmitting coils.
Drawings
FIG. 1 is a schematic structural diagram of a guide rail type dynamic wireless power transmission system based on compensation coil series connection provided by the invention;
FIG. 2 is a schematic diagram of a multi-stage transmit coil configuration provided by the present invention;
fig. 3 is a flow chart of the design of the auxiliary coil according to the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are given solely for the purpose of illustration and are not to be construed as limitations of the invention, including the drawings which are incorporated herein by reference and for illustration only and are not to be construed as limitations of the invention, since many variations thereof are possible without departing from the spirit and scope of the invention.
As shown in fig. 1 and fig. 2, in the present embodiment, a cross-coupling suppression structure in a guide rail type wireless power transmission system is provided, an energy transmitting end adopts a multi-section guide rail type wireless energy transmitting coil structure, a plurality of wireless energy transmitting coils are sequentially and horizontally arranged along a length direction, and current directions are in phase arrangement;
an auxiliary coil is arranged in each wireless energy transmitting coil, the current direction of the auxiliary coil and the current direction of the corresponding wireless energy transmitting coil are also in the same phase, and the coupling effect between the auxiliary coil and the wireless energy transmitting coil is opposite to that of the two adjacent sections of wireless energy transmitting coils.
As can be seen in the figure, the multistage launching guide rail L1、L2、L3The receiving coils are horizontally arranged, the current directions of the receiving coils are in the same phase, a transmitting track of the dynamic wireless power transmission system is formed, and the receiving coils are located right above the transmitting track and move and are respectively coupled with corresponding coils to pick up energy. Mutual coupling is easily generated between a plurality of transmitting guides due to too close arrangement distanceM12、M23Resulting in a complicated system analysis where mutual coupling between non-adjacent transmit coils is negligible due to the long transmit rail. The invention provides a small auxiliary coil L connected in series in the transmitting coilf1、Lf2、Lf3The auxiliary coil current and the transmitting coil current are in the same phase, so that the auxiliary coil and the transmitting coil generate mutual inductance M1、M2、M3The coupling effect is opposite to the coupling direction between adjacent transmitting coils, and the size and the number of turns of the auxiliary coil are selected to ensure that M is equal to M1＝M12、M2＝M12+M23、M3＝M23So as to counteract mutual cross coupling and realize cross decoupling among the multi-stage transmitting coils.
When the system is implemented specifically, each guide rail type wireless energy transmitting coil is identical in structure, the distance between two adjacent guide rail type wireless energy transmitting coils is identical, each guide rail type wireless energy transmitting coil is wound into a rectangular coil structure, each auxiliary coil is located in the middle of the corresponding section of wireless energy transmitting coil, and each auxiliary coil and the corresponding section of wireless energy transmitting coil are wound on the same plane by the same litz wire and are in series relation.
It can also be seen from the figure that each auxiliary coil and a corresponding section of wireless energy transmitting coil are in the same plane, and a coil blank area is reserved between the auxiliary coil and the corresponding section of wireless energy transmitting coil.
As can be seen from fig. 3, the present embodiment further provides a cross coupling suppression method in a guide rail type wireless power transmission system, and an auxiliary coil is connected in series between each two adjacent sections of wireless energy transmitting coils to suppress the coupling effect between the two adjacent sections of wireless energy transmitting coils by using the cross coupling suppression structure in the guide rail type wireless power transmission system. The implementation process mainly comprises the following steps:
s1: setting the size and the number of turns of the wireless energy transmitting coils and the distance between two adjacent wireless energy transmitting coils according to an application scene, and calculating the mutual inductance between the two adjacent wireless energy transmitting coils through simulation;
s2: selecting the initial size of the auxiliary coil according to the width of the wireless energy transmitting coil;
s3: setting a decoupling range according to an application scene;
s4: simulating to calculate whether the mutual inductance of the transmitting coil and the auxiliary coil reaches a preset decoupling range, and if not, changing the mutual inductance value by sequentially increasing the turns of the auxiliary coil; if so, determining the parameters of the auxiliary coil according to the final size and the number of turns;
s5: and winding each section of the guide rail type wireless energy transmitting coil structure according to the size and the number of turns of the wireless energy transmitting coil set in the step S1 and the size and the number of turns of the auxiliary coil determined in the step S4.
Referring to fig. 3, the first-stage transmitting coil and the last-stage transmitting coil are different from each other in design of corresponding coils because only one group of adjacent coils is provided, and in this embodiment, the decoupling range is determined by selecting an error coefficient k, so that the ratio of the decoupling range of the auxiliary coil in the first two wireless energy transmitting coils to the corresponding boundary value of the decoupling range of the auxiliary coil in the non-first two wireless energy transmitting coils in step S3 is 1: 2.
As can be seen from the figure, if the coil belongs to the first-stage transmitting coil or the last-stage transmitting coil, the mutual induction between the transmitting coil and the auxiliary coil meets the condition (1-k) that M is less than or equal to MnLess than or equal to (1+ k) M, if not belonging to the first-stage transmitting coil or the last-stage transmitting coil, the mutual induction between the transmitting coil and the auxiliary coil satisfies the condition 2(1-k) M less than or equal to Mn2(1+ k) M, wherein M represents the mutual inductance between two adjacent wireless energy transmitting coils calculated by simulation in step S1, MnThe mutual inductance between the transmitter coil and the auxiliary coil calculated by simulation in step S4 is represented.
By adopting the structure or the method, the cross coupling can be effectively eliminated, and the performance of the guide rail type wireless power transmission system is improved.
Finally, it should be noted that the above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations and simplifications which do not depart from the spirit and principle of the present invention should be regarded as equivalent substitutions and are included in the protection scope of the present invention.
Claims (9)
1. A cross coupling suppression structure in a guide rail type wireless power transmission system is characterized in that: the energy transmitting end adopts a multi-section guide rail type wireless energy transmitting coil structure, a plurality of wireless energy transmitting coils are sequentially and horizontally arranged along the length direction, and the current direction is in the same phase arrangement;
an auxiliary coil is arranged in each wireless energy transmitting coil, the current direction of the auxiliary coil and the current direction of the corresponding wireless energy transmitting coil are also in the same phase, and the coupling effect between the auxiliary coil and the wireless energy transmitting coil is opposite to that of the two adjacent sections of wireless energy transmitting coils.
2. The cross-coupling suppressing structure in a guideway wireless power transmission system according to claim 1, wherein: each section of wireless energy transmitting coil is wound into a rectangular coil structure, and each auxiliary coil is positioned in the middle of the corresponding section of wireless energy transmitting coil.
3. The cross-coupling suppressing structure in a guideway wireless power transmission system according to claim 1 or 2, wherein: each auxiliary coil is connected with a corresponding section of wireless energy transmitting coil in series.
4. The cross-coupling suppressing structure in a guideway wireless power transmission system according to claim 3, wherein: each auxiliary coil and the corresponding section of wireless energy transmitting coil are positioned on the same plane, and a coil blank area is reserved between the auxiliary coil and the corresponding section of wireless energy transmitting coil.
5. The cross-coupling suppressing structure in a guideway wireless power transmission system according to claim 4, wherein: each section of guide rail type wireless energy transmitting coil has the same structure, and the distance between two adjacent sections of guide rail type wireless energy transmitting coils is the same.
6. The cross-coupling suppressing structure in a guideway wireless power transmission system according to claim 3, wherein: each auxiliary coil and the corresponding section of wireless energy transmitting coil are formed by winding the same litz wire on the same plane.
7. A cross-coupling suppression method in a guide rail type wireless power transmission system, which adopts the cross-coupling suppression structure in the guide rail type wireless power transmission system according to any one of claims 1 to 6, characterized in that: the coupling influence between two adjacent sections of energy transmitting coils is suppressed by serially connecting an auxiliary coil in the middle of each section of wireless energy transmitting coil.
8. The cross-coupling suppression method in the guideway wireless power transmission system according to claim 7, wherein the method is performed according to the following steps:
s1: setting the size and the number of turns of the wireless energy transmitting coils and the distance between two adjacent wireless energy transmitting coils according to an application scene, and calculating the mutual inductance between the two adjacent wireless energy transmitting coils through simulation;
s2: selecting the initial size of the auxiliary coil according to the width of the wireless energy transmitting coil;
s3: setting a decoupling range according to an application scene;
s4: simulating to calculate whether the mutual inductance of the transmitting coil and the auxiliary coil reaches a preset decoupling range, and if not, changing the mutual inductance value by sequentially increasing the turns of the auxiliary coil; if so, determining the parameters of the auxiliary coil according to the final size and the number of turns;
s5: and winding each section of the guide rail type wireless energy transmitting coil structure according to the size and the number of turns of the wireless energy transmitting coil set in the step S1 and the size and the number of turns of the auxiliary coil determined in the step S4.
9. The cross-coupling suppression method in the guideway wireless power transmission system according to claim 8, wherein: in the step S3, the ratio of the decoupling range of the auxiliary coil in the first two wireless energy transmitting coils to the corresponding boundary value of the decoupling range of the auxiliary coil in the non-first two wireless energy transmitting coils is 1: 2.
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| CN202011446351.7A CN112564301A (en) | 2020-12-09 | 2020-12-09 | Cross coupling suppression structure and method in guide rail type wireless power transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258689A (en) * | 2021-06-09 | 2021-08-13 | 重庆前卫无线电能传输研究院有限公司 | Wireless energy transmitting device and multi-guide-rail wireless energy transmission system |
| CN114334437A (en) * | 2022-01-07 | 2022-04-12 | 重庆前卫无线电能传输研究院有限公司 | Winding method of energy transmitting coil and multi-stage guide rail wireless energy transmission system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738908A (en) * | 2011-03-29 | 2012-10-17 | 索尼公司 | Power supply device, power supply system, and electronic device |
| CN104810933A (en) * | 2015-04-30 | 2015-07-29 | 重庆大学 | Penetration type rail structure for electric vehicle dynamic wireless power supply |
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- 2020-12-09 CN CN202011446351.7A patent/CN112564301A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738908A (en) * | 2011-03-29 | 2012-10-17 | 索尼公司 | Power supply device, power supply system, and electronic device |
| CN104810933A (en) * | 2015-04-30 | 2015-07-29 | 重庆大学 | Penetration type rail structure for electric vehicle dynamic wireless power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258689A (en) * | 2021-06-09 | 2021-08-13 | 重庆前卫无线电能传输研究院有限公司 | Wireless energy transmitting device and multi-guide-rail wireless energy transmission system |
| CN114334437A (en) * | 2022-01-07 | 2022-04-12 | 重庆前卫无线电能传输研究院有限公司 | Winding method of energy transmitting coil and multi-stage guide rail wireless energy transmission system |
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