CN108964296A - Electromagnetic screen and method, the radio energy transmission system of wireless power transmission - Google Patents
Electromagnetic screen and method, the radio energy transmission system of wireless power transmission Download PDFInfo
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- CN108964296A CN108964296A CN201710385014.3A CN201710385014A CN108964296A CN 108964296 A CN108964296 A CN 108964296A CN 201710385014 A CN201710385014 A CN 201710385014A CN 108964296 A CN108964296 A CN 108964296A
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Abstract
The embodiment of the invention provides a kind of electromagnetic screen of wireless power transmission and methods, radio energy transmission system, wherein, the device includes: multiple shielded coils, multiple shielded coils are distributed in the transmitting coil and/or receiving coil surrounding of radio energy transmission system, the magnetic direction of each shielded coil is contrary with the radiation field of the transmitting coil and the receiving coil, for offsetting the radiation field of the transmitting coil and the receiving coil.The radiation field that magnetic flux leakage under the program either transmitting coil and receiving coil alignment condition generates, still the serious magnetic field radiation that the magnetic flux leakage in the case of transmitting coil and receiving coil are misaligned generates, it can be balanced out by the way that multiple shielded coils of transmitting coil and/or receiving coil surrounding are arranged in, the thickness of emitter and reception device is not will increase, meanwhile helping to improve the user experience of user.
Description
Technical field
The present invention relates to field of new energy technologies, in particular to the electromagnetic screen of a kind of wireless power transmission and side
Method, radio energy transmission system.
Background technique
With implementing for energy-saving and emission-reduction policy, new-energy automobile market, especially electric car or hybrid vehicle
It is able to fast development.Correspondingly, demand of the market to charging equipment is also growing day by day.Wireless charging due to its automation, be not necessarily to
Manual operation, not by advantages such as adverse weather conditions, have broad application prospects in electric vehicle charging field.It is wireless at present
Charging is applied in small-power field, such as mobile phone, tablet computer.But since electric car is to charge power requirement
Higher (for example, 3.3kW or more), high-power wireless charge caused by electromagnetic radiation become user major security risk and
Misgivings are finally difficult to promote on the market but also wireless charging device manufacturer is difficult to obtain the safety license of relevant departments
Using.
Currently, wireless power transmission mainly includes charging power source device, emitter, reception device, position detection and control
Device, mechanical structure and power transit line processed.Energy transmission relies primarily on the electromagnetism coupling between emitter and reception device
It closes, still, this electromagnetic coupling strengths are general relatively low (coefficient of coup is mostly less than 0.5), have a large amount of electromagnetic energies emitting
Space around device and reception device.
In order to reduce emitter and reception device because of electromagnetic radiation caused by electric energy transmission, mainstream in the prior art
Way has following three kinds:
1, coupling is increased to optimize magnetic field path using the magnetic core of F-SP, reduces leakage field and spacing electromagnetic radiation；
2, increase metal screen layer, electromagnetic radiation is offset by the inductive loop field of metal screen layer；
3, limitation transimission power carrys out limit electromagnetic radiation, makes it below the level of laws and regulations requirement, in short, radiation is just dropped greatly
Volume operation.
In the above prior art, either plus metal screen layer still uses the magnetic core of special shape, it is passive to belong to
Measure has the following problems:
1, the electromagnetic radiation when emitter and reception device are misaligned cannot all be improved, because not right
In neat situation, always there is the electromagnetic exposure of side than more serious, and passive measure can not targetedly eliminate rather harsh side
Electromagnetic radiation；
2, the thickness of emitter and reception device will be will increase using the magnetic core of special shape, but also emitter with
The admissible gap of reception device becomes larger, and is unfavorable for the big air gap wireless power transmission requirement of electric car.
If needing to detect radiation by installation magnetic flux transducer using above-mentioned 3rd kind of electromagnetic radiation method for limiting
Intensity unquestionably will increase cost；In addition, drop volume operation, then can seriously affect user to sacrifice charging rate as cost
User experience.
Summary of the invention
The embodiment of the invention provides a kind of electromagnetic screens of wireless power transmission, to solve disappearing in the prior art
It will increase the thickness of emitter and reception device when except electromagnetic radiation, sacrifice charging rate leads to the user's body for influencing user
The technical issues of testing and electromagnetic radiation can not be effectively eliminated when emitter and reception device are misaligned.The device packet
Include: multiple shielded coils, multiple shielded coils are distributed in the transmitting coil and/or receiving coil of radio energy transmission system
Surrounding, the radiation field direction phase of the magnetic direction and the transmitting coil and the receiving coil of each shielded coil
Instead, for offsetting the radiation field of the transmitting coil and the receiving coil.
In one embodiment, further includes: for electrically-actuated device, connect with each shielded coil, for there is screen
Cover it is coil-induced to radiation field and when induced magnetic field is greater than preset value, for the shielded coil power supply for sensing radiation field, and
According to the current direction and current strength of the direction of the induced magnetic field and the strength control shielded coil, the induction magnetic is offset
?.
In one embodiment, each shielded coil includes first coil portion and the second coil part, the First Line
Circle portion is horizontal positioned, and second coil part and horizontal plane form default angle, and the magnetic direction of the shielded coil is towards institute
It states transmitting coil or the receiving coil is concentrated.
In one embodiment, the radiation of the size of second coil part and the transmitting coil and the receiving coil
Magnetic field strength is directly proportional；The size for the default angle that second coil part and horizontal plane are formed and the transmitting coil and described
The radiation magnetic field strength of receiving coil is directly proportional.
In one embodiment, the default angle that second coil part and horizontal plane are formed is greater than 10 degree and less than 90
Degree.
In one embodiment, each shielded coil further include: magnet assembly is arranged in the first coil portion
It is interior.
The embodiment of the invention also provides a kind of radio energy transmission systems, to solve eliminating electromagnetism spoke in the prior art
Will increase when penetrating emitter and reception device thickness, sacrifice charging rate cause influence user user experience and
The technical issues of emitter and reception device can not effectively eliminate electromagnetic radiation in the case of being misaligned.The system includes above-mentioned
A kind of electromagnetic screen for wireless power transmission of anticipating.
The embodiment of the invention also provides a kind of electromagnetic shielding methods of wireless power transmission, to solve to exist in the prior art
Eliminate the thickness that will increase emitter and reception device when electromagnetic radiation, sacrifice charging rate leads to the user for influencing user
The technical issues of experiencing and electromagnetic radiation can not be effectively eliminated when emitter and reception device are misaligned.This method
It include: that multiple shielded coils are respectively set in the transmitting coil and/or receiving coil surrounding of radio energy transmission system；Control is every
The magnetic direction of a shielded coil is contrary with the radiation field of the transmitting coil and the receiving coil, offsets institute
State the radiation field of transmitting coil and the receiving coil.
In one embodiment, the magnetic direction of each shielded coil is controlled, comprising: having shielded coil to sense
When radiation field and induced magnetic field are greater than preset value, use for electrically-actuated device to sense that the shielded coil of radiation field supplies
Electricity, and according to the current direction and current strength of the direction of induced magnetic field and the strength control shielded coil, offset induced magnetic field.
In one embodiment, it includes first coil portion and the second coil part that each shielded coil, which is arranged, and described the
One coil part is horizontal positioned, and second coil part and horizontal plane form default angle, the magnetic direction of the shielded coil to
The transmitting coil or the receiving coil concentrate.
In one embodiment, the radiation of the size of second coil part and the transmitting coil and the receiving coil
Magnetic field strength is directly proportional；The size for the default angle that second coil part and horizontal plane are formed and the transmitting coil and described
The radiation magnetic field strength of receiving coil is directly proportional.
In one embodiment, the default angle that second coil part and horizontal plane are formed is greater than 10 degree and less than 90
Degree.
In one embodiment, magnet assembly is set in the first coil portion of each shielded coil.
In embodiments of the present invention, pass through the transmitting coil and/or receiving coil surrounding point in radio energy transmission system
Multiple shielded coils are not set, the magnetic field of multiple shielded coil can offset the radiation field of transmitting coil and receiving coil,
The radiation field or transmitting coil and receive line that magnetic flux leakage either under transmitting coil and receiving coil alignment condition generates
The serious magnetic field radiation that the magnetic flux leakage enclosed in the case of being misaligned generates, can be by being arranged in transmitting coil and/or reception
Multiple shielded coils of coil surrounding balance out, and compared with prior art, the magnetic core using F-SP are avoided, so that will not
Increase the thickness of emitter and reception device；Meanwhile avoiding helping to reduce cost using magnetic flux transducer, it avoids sacrificing
Charging rate facilitates the user experience for improving user.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, not
Constitute limitation of the invention.In the accompanying drawings:
Fig. 1 is a kind of schematic diagram of the electromagnetic screen of wireless power transmission provided in an embodiment of the present invention；
Fig. 2 is a kind of magnetic field schematic diagram of transmitting coil and receiving coil alignment provided in an embodiment of the present invention；
Fig. 3 is the magnetic field schematic diagram that a kind of transmitting coil and receiving coil provided in an embodiment of the present invention are misaligned；
Fig. 4 is a kind of magnetic field schematic diagram of shielded coil provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram one of shielded coil provided in an embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram two of shielded coil provided in an embodiment of the present invention；
Fig. 7 is a kind of flow chart of the electromagnetic shielding method of wireless power transmission provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, right below with reference to embodiment and attached drawing
The present invention is described in further details.Here, exemplary embodiment and its explanation of the invention is used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
In embodiments of the present invention, a kind of electromagnetic screen of wireless power transmission is provided, as shown in Figure 1 (with hair
For ray circle), which includes:
Multiple shielded coils 101, multiple shielded coils are distributed in the transmitting coil 102 of radio energy transmission system
And/or receiving coil (not shown in figure 1) surrounding, the magnetic direction of each shielded coil and the transmitting coil and described
The radiation field of receiving coil is contrary, for offsetting the radiation field of the transmitting coil and the receiving coil.
As shown in Figure 1 it is found that in embodiments of the present invention, by radio energy transmission system transmitting coil and/or
Receiving coil surrounding is respectively set multiple shielded coils, and the magnetic field of multiple shielded coil with active shield transmitting coil and can connect
The radiation field of take-up circle, the radiation field that the magnetic flux leakage either under transmitting coil and receiving coil alignment condition generates, also
Be transmitting coil and receiving coil be misaligned in the case of the serious magnetic field radiation that generates of magnetic flux leakage, can be existed by setting
Transmitting coil and/or multiple shielded coils of receiving coil surrounding balance out, and compared with prior art, avoid using special shape
The magnetic core of shape, so that not will increase the thickness of emitter and reception device；Meanwhile it avoiding facilitating using magnetic flux transducer
Cost is reduced, avoids sacrificing charging rate, facilitates the user experience for improving user.
When it is implemented, as shown in Fig. 2, in radio energy transmission system, transmitting coil (Tx coil) 102 and receive
The magnetic field that coil (Rx coil) 103 generates consists of two parts: 1. coupled magnetic fields (coupling flux), and coupled magnetic field carries out
Effective energy transmission；2. magnetic flux leakage (leakage flux), the magnetic flux leakage of transmitting coil (Tx coil) 102 and receiving coil
It is not involved in energy transmission, is the main source of electromagnetic radiation.The application is multiple in transmitting coil and/or the setting of receiving coil surrounding
Shielded coil, purpose are exactly to offset the radiation field generated by magnetic flux leakage.
When it is implemented, as shown in figure 3, under high-power wireless electric energy transmission application, in fact it could happen that transmitting coil (Tx
Coil) 102 the case where being misaligned with receiving coil (Rx coil) 103 (transmitting coil 102 and 103 center of receiving coil in Fig. 3
The distance of deviation is Misalignment), at this point, magnetic flux leakage (leakage flux) can be bigger, electromagnetic radiation is also more
Seriously, by the way that multiple shielded coils are arranged in transmitting coil and/or receiving coil surrounding, then radiative collision can be effectively canceled out
?.
When it is implemented, how multiple shielded coils are specifically distributed in transmitting coil and/or receiving coil surrounding, the application
It is not specifically limited, as long as the magnetic field of multiple shielded coils can offset the radiation field of transmitting coil and receiving coil.
When it is implemented, in order to more effectively, pointedly offset the radiation field of transmitting coil and receiving coil,
In the present embodiment, further includes: for electrically-actuated device, connect with each shielded coil, for there is shielded coil to sense
When radiation field and induced magnetic field are greater than preset value, for the shielded coil power supply for sensing radiation field, and according to the induction
The current direction and current strength of the direction and strength control in the magnetic field shielded coil, offset the induced magnetic field.
Specifically, giving multiple screens after multiple shielded coils are distributed in transmitting coil and/or receiving coil surrounding
Before covering coil power supply, if there is magnetic flux leakage between transmitting coil and receiving coil, (no matter transmitting coil and receiving coil are pair
The case where being still misaligned together), which can generate radiation field, will incude now close to the shielded coil of radiation field
To radiation field, when the induced magnetic field sensed is greater than preset value, so that it may sense the shielded coil of radiation field for this
Power supply, and according to the current direction and current strength of the direction of induced magnetic field and the strength control shielded coil, so that shielding line
The magnetic direction of circle is contrary with radiation field, and the magnetic field strength of shielded coil is approximately equal to radiation magnetic field strength, with effectively,
Pointedly offset the induced magnetic field.For example, as shown in figure 3, if receiving coil 103 deviates axis and deviates to the right, it is left
The electromagnetic exposure of side will increase, and the radiation field in left side can be very strong, and the shielded coil positioned at left side will first sense certain strong
The induced magnetic field of degree, and then the shielded coil for being located at left side will be powered, and generate contrary, the comparable magnetic field of intensity, with
Offset radiation field.
When it is implemented, the magnetic field to space divergence can be generated after shielded coil is powered, as shown in figure 4, the magnetic field
A part of (magnetic field cancellation flux as shown in Figure 4) is used to offset radiation field, and a part of magnetic field is (in such as Fig. 4
Shown in the magnetic field EMF) can then generate re-radiated field, in order to avoid generate re-radiated field, in the present embodiment, such as Fig. 5 institute
Show, each shielded coil 101 includes first coil portion 1011 and the second coil part 1012, and the first coil portion level is put
It sets, second coil part and horizontal plane form default angle a, and the magnetic direction of the shielded coil is (as shown by the arrows in Figure 5
Direction) it is concentrated towards the transmitting coil or the receiving coil.I.e. shielded coil is not limited to planar structure, can be first
The 3D structure that coil part 1011 and 1012 shape of the second coil part form an angle, the structure guide the magnetic field of shielded coil in
Heart main coil (transmitting coil or receiving coil) is concentrated, and re-radiated field is reduced.
Specifically, the radiation magnetic field strength of the size of second coil part and the transmitting coil and the receiving coil
It is directly proportional；The size and the transmitting coil and the receiving coil for the default angle that second coil part and horizontal plane are formed
Radiation magnetic field strength it is directly proportional.For example, the second coil part is bigger with respect to first coil portion, then be more conducive to guide shielded coil
Magnetic field concentration, be more conducive to using concentrate magnetic field cancellation transmitting coil and receiving coil radiation field, reduce two subradius
Penetrate field；Similarly, as shown in figure 5, the second coil part and the default angle a of horizontal plane formation are bigger, be then more conducive to guidance shielding
The magnetic field concentration of coil is more conducive to the radiation field using the magnetic field cancellation transmitting coil and receiving coil concentrated, reduces two
Secondary radiation field.
When it is implemented, the default angle a that second coil part and horizontal plane are formed is greater than 10 degree and less than 90 degree.
When it is implemented, the magnetic field concentration in order to further guide shielded coil, in the present embodiment, as shown in fig. 6, often
A shielded coil further include: magnet assembly 1013 is arranged in the first coil portion 1011.Specifically, setting shielding
When coil, first coil portion close to transmitting coil or receiving coil side, such shielded coil concentrate after magnetic field (arrow in such as Fig. 6
Direction shown in head) just towards transmitting coil or receiving coil side, it is contrary with radiation field.
In the present embodiment, a kind of radio energy transmission system is additionally provided comprising any one of the above radio energy
The electromagnetic screen of transmission.
Based on the same inventive concept, a kind of electromagnetic shielding side of wireless power transmission is additionally provided in the embodiment of the present invention
Method, as described in the following examples.The principle and radio energy solved the problems, such as due to the electromagnetic shielding method of wireless power transmission
The electromagnetic screen of transmission is similar, therefore the implementation of the electromagnetic shielding method of wireless power transmission may refer to radio energy biography
The implementation of defeated electromagnetic screen, overlaps will not be repeated.It can and be contemplated.
Fig. 7 is a kind of flow chart of the electromagnetic shielding method of the wireless power transmission of the embodiment of the present invention, as shown in fig. 7,
This method comprises:
Step 701: multiple shieldings are respectively set in the transmitting coil and/or receiving coil surrounding of radio energy transmission system
Coil；
Step 702: the magnetic direction and the transmitting coil of each shielded coil of control and the receiving coil
Radiation field is contrary, offsets the radiation field of the transmitting coil and the receiving coil.
In one embodiment, the magnetic direction of each shielded coil is controlled, comprising: having shielded coil to sense
When radiation field and induced magnetic field are greater than preset value, use for electrically-actuated device to sense that the shielded coil of radiation field supplies
Electricity, and according to the current direction and current strength of the direction of induced magnetic field and the strength control shielded coil, offset induced magnetic field.
In one embodiment, it includes first coil portion and the second coil part that each shielded coil, which is arranged, and described the
One coil part is horizontal positioned, and second coil part and horizontal plane form default angle, the magnetic direction of the shielded coil to
The transmitting coil or the receiving coil concentrate.
In one embodiment, the radiation of the size of second coil part and the transmitting coil and the receiving coil
Magnetic field strength is directly proportional；The size for the default angle that second coil part and horizontal plane are formed and the transmitting coil and described
The radiation magnetic field strength of receiving coil is directly proportional.
In one embodiment, the default angle that second coil part and horizontal plane are formed is greater than 10 degree and less than 90
Degree.
In one embodiment, magnet assembly is set in the first coil portion of each shielded coil.
In embodiments of the present invention, pass through the transmitting coil and/or receiving coil surrounding point in radio energy transmission system
Multiple shielded coils are not set, the magnetic field of multiple shielded coil can offset the radiation field of transmitting coil and receiving coil,
The radiation field or transmitting coil and receive line that magnetic flux leakage either under transmitting coil and receiving coil alignment condition generates
The serious magnetic field radiation that the magnetic flux leakage enclosed in the case of being misaligned generates, can be by being arranged in transmitting coil and/or reception
Multiple shielded coils of coil surrounding balance out, and compared with prior art, the magnetic core using F-SP are avoided, so that will not
Increase the thickness of emitter and reception device；Meanwhile avoiding helping to reduce cost using magnetic flux transducer, it avoids sacrificing
Charging rate facilitates the user experience for improving user.
Obviously, those skilled in the art should be understood that each module of the above-mentioned embodiment of the present invention or each step can be with
It is realized with general computing device, they can be concentrated on a single computing device, or be distributed in multiple computing devices
On composed network, optionally, they can be realized with the program code that computing device can perform, it is thus possible to by it
Store and be performed by computing device in the storage device, and in some cases, can be held with the sequence for being different from herein
The shown or described step of row, perhaps they are fabricated to each integrated circuit modules or will be multiple in them
Module or step are fabricated to single integrated circuit module to realize.In this way, the embodiment of the present invention be not limited to it is any specific hard
Part and software combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the embodiment of the present invention can have various modifications and variations.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of electromagnetic screen of wireless power transmission characterized by comprising
Multiple shielded coils, multiple shielded coils are distributed in the transmitting coil of radio energy transmission system and/or receive line
Enclose surrounding, the radiation field direction phase of the magnetic direction and the transmitting coil and the receiving coil of each shielded coil
Instead, for offsetting the radiation field of the transmitting coil and the receiving coil.
2. the electromagnetic screen of wireless power transmission as described in claim 1, which is characterized in that further include:
It for electrically-actuated device, is connect with each shielded coil, for there is shielded coil to sense radiation field and induction
When magnetic field is greater than preset value, to sense that the shielded coil of radiation field is powered, and according to the direction of the induced magnetic field and by force
Degree controls the current direction and current strength of the shielded coil, offsets the induced magnetic field.
3. the electromagnetic screen of wireless power transmission as claimed in claim 1 or 2, which is characterized in that each shielding
Coil includes first coil portion and the second coil part, and the first coil portion is horizontal positioned, second coil part and horizontal plane
Default angle is formed, the magnetic direction of the shielded coil is concentrated towards the transmitting coil or the receiving coil.
4. the electromagnetic screen of wireless power transmission as claimed in claim 3, which is characterized in that second coil part
Size is directly proportional to the radiation magnetic field strength of the transmitting coil and the receiving coil；Second coil part and horizontal plane shape
At default angle size it is directly proportional to the radiation magnetic field strength of the transmitting coil and the receiving coil.
5. the electromagnetic screen of wireless power transmission as claimed in claim 3, which is characterized in that second coil part and
The default angle that horizontal plane is formed is greater than 10 degree and less than 90 degree.
6. the electromagnetic screen of wireless power transmission as claimed in claim 3, which is characterized in that each shielded coil
Further include:
Magnet assembly is arranged in the first coil portion.
7. a kind of radio energy transmission system characterized by comprising
The electromagnetic screen of wireless power transmission described in any one of claims 1 to 6.
8. a kind of electromagnetic shielding method of wireless power transmission characterized by comprising
Multiple shielded coils are respectively set in the transmitting coil and/or receiving coil surrounding of radio energy transmission system；
Control the magnetic direction of each shielded coil and the radiation field direction of the transmitting coil and the receiving coil
On the contrary, offsetting the radiation field of the transmitting coil and the receiving coil.
9. the electromagnetic shielding method of wireless power transmission as claimed in claim 8, which is characterized in that each shielding of control
The magnetic direction of coil, comprising:
When there is shielded coil to sense that radiation field and induced magnetic field are greater than preset value, use for electrically-actuated device to sense
The shielded coil of radiation field is powered, and according to the current direction and electricity of the direction of induced magnetic field and the strength control shielded coil
Intensity of flow offsets induced magnetic field.
10. the electromagnetic shielding method of wireless power transmission as claimed in claim 8 or 9, which is characterized in that setting is each described
Shielded coil includes first coil portion and the second coil part, and the first coil portion is horizontal positioned, second coil part and water
Plane forms default angle, and the magnetic direction of the shielded coil is concentrated towards the transmitting coil or the receiving coil.
11. the electromagnetic shielding method of wireless power transmission as claimed in claim 10, which is characterized in that second coil part
Size it is directly proportional to the radiation magnetic field strength of the transmitting coil and the receiving coil；Second coil part and horizontal plane
The size of the default angle formed is directly proportional to the radiation magnetic field strength of the transmitting coil and the receiving coil.
12. the electromagnetic shielding method of wireless power transmission as claimed in claim 10, which is characterized in that second coil part
The default angle formed with horizontal plane is greater than 10 degree and less than 90 degree.
13. the electromagnetic shielding method of wireless power transmission as claimed in claim 10, which is characterized in that in each shielding
Magnet assembly is set in the first coil portion of coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710385014.3A CN108964296A (en) | 2017-05-26 | 2017-05-26 | Electromagnetic screen and method, the radio energy transmission system of wireless power transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710385014.3A CN108964296A (en) | 2017-05-26 | 2017-05-26 | Electromagnetic screen and method, the radio energy transmission system of wireless power transmission |
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| CN108964296A true CN108964296A (en) | 2018-12-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277838A (en) * | 2019-07-12 | 2019-09-24 | 东莞铭普光磁股份有限公司 | A kind of wireless charging device |
| CN112612062A (en) * | 2020-12-31 | 2021-04-06 | 上海太易检测技术有限公司 | Gold detection machine and gold detection machine transmitting module |
| CN112615440A (en) * | 2020-12-25 | 2021-04-06 | 国网北京市电力公司 | Wireless power transmission device and wireless power transmission system |
| CN113890206A (en) * | 2021-10-22 | 2022-01-04 | 西南交通大学 | Induction type WPT (Windows presentation technology) bilateral LCLC (liquid Crystal display) topology for shielding peripheral magnetic field and parameter design method thereof |
-
2017
- 2017-05-26 CN CN201710385014.3A patent/CN108964296A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277838A (en) * | 2019-07-12 | 2019-09-24 | 东莞铭普光磁股份有限公司 | A kind of wireless charging device |
| CN112615440A (en) * | 2020-12-25 | 2021-04-06 | 国网北京市电力公司 | Wireless power transmission device and wireless power transmission system |
| CN112612062A (en) * | 2020-12-31 | 2021-04-06 | 上海太易检测技术有限公司 | Gold detection machine and gold detection machine transmitting module |
| CN112612062B (en) * | 2020-12-31 | 2023-12-19 | 上海太易检测技术有限公司 | Gold inspection machine and gold inspection machine transmitting module |
| CN113890206A (en) * | 2021-10-22 | 2022-01-04 | 西南交通大学 | Induction type WPT (Windows presentation technology) bilateral LCLC (liquid Crystal display) topology for shielding peripheral magnetic field and parameter design method thereof |
| CN113890206B (en) * | 2021-10-22 | 2023-03-21 | 西南交通大学 | Induction type WPT (Windows presentation technology) bilateral LCLC (liquid Crystal display) topology for shielding peripheral magnetic field and parameter design method thereof |
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Application publication date: 20181207 |