KR20170047429A - Electromagnetic wave absorber for transmitter of wireless charger - Google Patents
Electromagnetic wave absorber for transmitter of wireless charger Download PDFInfo
- Publication number
- KR20170047429A KR20170047429A KR1020150147111A KR20150147111A KR20170047429A KR 20170047429 A KR20170047429 A KR 20170047429A KR 1020150147111 A KR1020150147111 A KR 1020150147111A KR 20150147111 A KR20150147111 A KR 20150147111A KR 20170047429 A KR20170047429 A KR 20170047429A
- Authority
- KR
- South Korea
- Prior art keywords
- metal sheet
- polymer metal
- electromagnetic wave
- wave absorber
- transmitter
- Prior art date
Links
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 28
- 239000002159 nanocrystal Substances 0.000 claims abstract description 43
- 229920000642 polymer Polymers 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 35
- 230000005540 biological transmission Effects 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000006698 induction Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000020169 heat generation Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000035699 permeability Effects 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 238000003490 calendering Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/004—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems using non-directional dissipative particles, e.g. ferrite powders
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- H02J7/025—
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
The present invention relates to an electromagnetic wave absorber for a transmitter of a wireless charger, and more particularly, to an electromagnetic wave absorber for a transmitter of a wireless charger, and more particularly to a wireless charger To an electromagnetic wave absorber for a transmitter.
Generally, a wireless charger is composed of a transmitter that sends power and a receiver that transmits and receives power, and the transmitter and receiver are made up of coils and electronic circuits. In addition, an electromagnetic wave absorber is inserted in the inside to induce magnetism and cut off unnecessary radiation noise.
As the electromagnetic wave absorber for the transmitter of the wireless charger, a polymer metal sheet formed by mixing a ferrite sintered body, an electromagnetic wave absorbing powder and a resin, and calendering or coating is used, or an amorphous material is used.
Since the ferrite sintered body has a problem of breakage upon impact, the thickness should be 1.0 mm or more, and the polymer metal sheet should have a thickness of 1.0 mm or more to ensure the performance. Amorphous material has high permeability in the thin film but high DC resistance (DCR) .
In order to reduce the heat generation of the amorphous material, usually, the size of the amorphous material should be small. However, in this case, the performance (permeability) is unstable, and in order to obtain a predetermined inductance value,
Korean Patent Registration No. 10-1177302 entitled " Wireless Antenna Including Electromagnetic Wave Absorptive Sheet and Wireless Antenna for Wireless Charging, and Method of Manufacturing the Same "
Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an amorphous nanocrystal line and a polymer- And an object of the present invention is to provide an electromagnetic wave absorber for a transmitter of a wireless charger, which is improved in safety of a product by reducing direct current resistance (DCR) while reducing heat generation.
According to another aspect of the present invention, there is provided an electromagnetic wave absorber for a transmitter of a wireless charger, comprising: a polymer metal sheet; an amorphous nano-crystal line disposed on the upper surface of the polymer metal sheet, The polymer metal sheet and each nano-crystal line are characterized in that they are bonded with a double-sided tape.
Here, the nano-crystal lines are arranged in a plurality of layers and are bonded with a double-sided tape.
And the polymer metal sheet is further attached to the double-sided tape so as to cover the upper surface of each of the nano-crystal lines.
The electromagnetic wave absorber for a transmitter of a wireless charger has a transmission coil disposed at the center of the surface of a polymer metal sheet not adhered to the nanocrystal line in a state where the nanocristal line and the polymer metal sheet are bonded, And the transmission coil is arranged so as to extend over a semicircle corresponding to the half circle.
As described above, according to the electromagnetic wave absorber for a transmitter of a wireless charger according to the present invention, an amorphous nano crystal line and a polymer mattress sheet are adhered to each other by a double-sided tape so that the induction power is well transmitted while being thin, And the center of the transmission coil is disposed between the two nano-crystal lines so as to lower the DC resistance (DCR), thereby reducing the heat generation, thereby improving the safety of the product.
1 is an explanatory view showing an electromagnetic wave absorber for a transmitter of a wireless charger according to an embodiment of the present invention,
FIG. 2 is an explanatory view showing a state in which a transmission coil is installed below or above an electromagnetic wave absorber for a transmitter of a wireless charger according to an embodiment of the present invention;
3 is an explanatory view showing a radio wave absorber for a transmitter of a wireless charger according to the second embodiment of the present invention;
FIG. 4 is an explanatory view showing a state where a transmission coil is installed on an upper part of a electromagnetic wave absorber for a transmitter of a wireless charger according to a second embodiment of the present invention;
Fig. 5 is an explanatory view showing that a transmission coil is arranged in a nano-crinary line layer constituting the electromagnetic wave absorber of the present invention; Fig.
6 is an explanatory view showing that a transmission coil is disposed on a polymer metal seed plane constituting the electromagnetic wave absorber of the present invention.
Hereinafter, an electromagnetic wave absorber for a transmitter of a wireless charger according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
In the drawings, the same reference numerals are given to the same elements even when they are shown in different drawings. In the drawings, the same reference numerals as used in the accompanying drawings are used to designate the same or similar elements. And detailed description of the configuration will be omitted. Also, directional terms such as "top", "bottom", "front", "back", "front", "forward", "rear", etc. are used in connection with the orientation of the disclosed drawing (s). Since the elements of the embodiments of the present invention can be positioned in various orientations, the directional terminology is used for illustrative purposes, not limitation.
The electromagnetic wave absorber for a transmitter of a wireless charger of the present invention will be described with reference to Figs. 1 to 4. Fig.
As shown in FIG. 1, the electromagnetic wave absorber 1000 for a transmitter of the wireless charger of the present invention includes a
When the
Therefore, the electromagnetic wave absorber 1000 can be made by taking all the advantages of the
The present invention is an amorphous material having a thickness of 18 to 25 袖 m arranged in two halves to the left and right so that the
That is, the
Accordingly, since the nano-
As shown in FIGS. 1 to 4, the nano-
Accordingly, the
On the other hand, the
Thus, as described above, since the double-
1 to 6, the electromagnetic wave absorber 1000 for a transmitter of the wireless charger includes a nano crystal line 1200 (see FIG. 1) composed of the
Therefore, the center of the
The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention if they are apparent to those skilled in the art.
1000: electromagnetic wave absorber for transmitter of wireless charger 1100: polymer metal sheet
1200: Nano crystal line 1300: Double-sided tape
2000: Transmission coil
Claims (5)
An amorphous nano-crystal line having a thickness arranged to cover the upper surface of the polymer metal sheet in two halves to the left and right sides,
Wherein the polymer metal sheet and each nanocrystal line are bonded to each other with a double-sided tape.
Wherein the nano-crystal lines are arranged in a plurality of layers and are bonded to each other with a double-sided tape.
Wherein the polymer metal sheet is further attached to the double-sided tape so as to cover the upper surface of each of the nano-crystal lines.
The transmission coil constituting the transmitter of the wireless charger is disposed at the center of the surface of the polymer metal sheet not adhered to the nanocrystal line in a state where the nanocristal line and the polymer metal sheet are adhered to each other, Wherein the electromagnetic wave absorber is arranged so as to extend over half of the line.
The polymer metal sheet has a thickness of 100 to 500 mu m,
The amorphous nanocrystal line has a thickness of 18 to 25 um,
Wherein the double-sided tape has a thickness of 5 to 20 mu m. The electromagnetic wave absorber for a transmitter of a wireless charger
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150147111A KR20170047429A (en) | 2015-10-22 | 2015-10-22 | Electromagnetic wave absorber for transmitter of wireless charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150147111A KR20170047429A (en) | 2015-10-22 | 2015-10-22 | Electromagnetic wave absorber for transmitter of wireless charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20170047429A true KR20170047429A (en) | 2017-05-08 |
Family
ID=60164395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150147111A KR20170047429A (en) | 2015-10-22 | 2015-10-22 | Electromagnetic wave absorber for transmitter of wireless charger |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20170047429A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021030532A1 (en) * | 2019-08-14 | 2021-02-18 | Baker Hughes Oilfield Operations Llc | Nanocrystalline tapes for wireless transmission of electrical signals and power in downhole drilling systems |
| CN114914712A (en) * | 2022-06-16 | 2022-08-16 | 西安电子科技大学 | Reconfigurable elastic wave absorber based on metal nanowire aerogel and preparation method thereof |
-
2015
- 2015-10-22 KR KR1020150147111A patent/KR20170047429A/en active IP Right Grant
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021030532A1 (en) * | 2019-08-14 | 2021-02-18 | Baker Hughes Oilfield Operations Llc | Nanocrystalline tapes for wireless transmission of electrical signals and power in downhole drilling systems |
| WO2022035466A1 (en) * | 2019-08-14 | 2022-02-17 | Baker Hughes Oilfield Operations Llc | Nanocrystalline tapes for wireless transmission of electrical signals and power in downhole drilling systems |
| GB2612934A (en) * | 2019-08-14 | 2023-05-17 | Baker Hughes Oilfield Operations Llc | Nanocrystalline tapes for wireless transmission of electrical signals and power in downhole drilling systems |
| CN114914712A (en) * | 2022-06-16 | 2022-08-16 | 西安电子科技大学 | Reconfigurable elastic wave absorber based on metal nanowire aerogel and preparation method thereof |
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