KR20160089267A - Wireless power charging apparatus using superconducting coil - Google Patents
Wireless power charging apparatus using superconducting coil Download PDFInfo
- Publication number
- KR20160089267A KR20160089267A KR1020150184741A KR20150184741A KR20160089267A KR 20160089267 A KR20160089267 A KR 20160089267A KR 1020150184741 A KR1020150184741 A KR 1020150184741A KR 20150184741 A KR20150184741 A KR 20150184741A KR 20160089267 A KR20160089267 A KR 20160089267A
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- South Korea
- Prior art keywords
- coil
- superconducting
- wireless power
- receiver
- source
- Prior art date
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- 230000005540 biological transmission Effects 0.000 claims abstract description 97
- 238000001816 cooling Methods 0.000 claims abstract description 77
- 230000005611 electricity Effects 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 230000001939 inductive effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 239000002887 superconductor Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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- H02J7/025—
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- H02J17/00—
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- Y02E40/647—
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to a wireless power transmission / reception device and a wireless power charging system using the superconducting coil as a resonant coil. The wireless power charging system includes a power source, And a battery connected to the wireless power receiver for charging electric power. The wireless power transmitter includes a source coil connected to the power source, And a first conduction cooling device connected to the superconducting transmission coil for cooling the superconducting transmission coil, wherein the superconducting transmission coil includes a first superconducting coil and a second superconducting coil, Wherein the wireless power receiver comprises: A superconducting reception coil having a resonance frequency equal to that of the superconducting transmission coil and receiving power from the superconducting transmission coil using frequency resonance between coils; And a second conduction cooling device connected to the superconducting receiver coil for cooling the superconducting receiver coil.
Description
BACKGROUND OF THE
Electric vehicles can reduce greenhouse gas emissions compared to existing vehicles using fossil fuel as driving energy, and can improve the living environment because they do not generate air pollutants at all. Also, even if oil prices are increased due to the limited fossil fuel, electric vehicles can be reduced in maintenance cost, and the necessity is further increased. However, in order to commercialize an electric vehicle, the size and performance of the battery must be guaranteed, the infrastructure for charging must be properly established, and the problems such as the time taken to charge, mileage after charging, and electric shock during charging must be solved. However, at present, these problems are not completely solved and electric vehicles are still in the early stage of commercialization. One of the ways to solve these problems is wireless charging technology using wireless power transmission technology. The wireless charging method using the wireless power transmission technology is advantageous in that it is easy to construct an infrastructure because it is easy to apply an electric coil because there is no possibility of an electric shock accident during charging compared with a plug-in charging method. In addition, since the electric vehicle can be charged when the electric vehicle is in a stopped state as in the case of parking, it is possible to reduce the labor of charging the electric vehicle separately.
However, the wireless charging method has a limitation in the power transmission distance in the early stage of development, and there is a drawback that the power transmission efficiency is extremely changed according to the arrangement of the transmitting and receiving coils. Research and development are continuing to complement these shortcomings.
The present invention provides a wireless power transmission / reception device capable of improving power transmission efficiency by using a superconducting coil as a resonant coil, and a wireless power charging system using the same. Also, there is provided a wireless power transmission / reception device capable of reducing size and weight by using a conduction cooling type cooling device for maintaining a low temperature state of a superconducting coil and a wireless power charging system using the same.
A wireless power charging system according to the present invention includes a power source, a wireless power transmitting unit connected to the power source to transmit power wirelessly, a wireless power receiving unit receiving power from the wireless power transmitting unit, The superconducting coil having a source coil connected to the power source, a superconducting coil for inducing electricity by the generated magnetic field when a magnetic field is generated by flowing electricity to the source coil, and a superconducting coil connected to the superconducting coil And a first conduction cooling unit for cooling the superconducting transmission coil, wherein the wireless power receiving unit has a resonance frequency equal to that of the superconducting transmission coil of the wireless power transmission unit, A superconducting receiver coil for receiving power, The electricity flows when the magnetic field is generated, connected to the load coil and the superconducting coil receives electricity is induced by the generated magnetic field to the receiving coil and a second conducting a cooling device for cooling the superconducting coil reception.
In one embodiment, the superconducting transmission coil is spirally wound, and the source coil is disposed so as to surround the superconducting transmission coil wound helically.
In one embodiment, the wireless power transmitter includes a first temperature sensor for sensing a temperature of the superconducting coil, and a second temperature sensor for sensing a temperature of the superconducting coil, And a first control unit for controlling the first conduction cooling apparatus.
In one embodiment, the source coil is a superconducting coil, and the first conduction cooling device is connected to the superconducting source coil to cool the superconducting source coil.
In one embodiment, the wireless power transmission unit is installed below the ground surface.
In one embodiment, the superconducting receiver coil is spirally wound, and the load coil is disposed so as to surround the superconducting receiver coil spirally wound.
In one embodiment, the wireless power receiver includes a second temperature sensor for sensing a temperature of the superconducting receiver coil, and a second temperature sensor for sensing a temperature of the superconducting receiver coil, And a second control unit for controlling the second conduction cooling apparatus.
In one embodiment, the load coil is a superconducting coil, and the second conduction cooling device is connected to the superconducting rod coil to cool the superconducting rod coil.
In one embodiment, the wireless power receiver is installed in the lower portion of the vehicle.
In one embodiment, a magnetic shielding layer is provided on the upper portion of the wireless power transmission portion to shield the magnetic field flowing into the vehicle interior.
The wireless power transmission apparatus according to the present invention includes a power source and a wireless power transmission unit connected to the power source and wirelessly transmitting power, wherein the wireless power transmission unit includes a source coil connected to the power source, And a first conduction cooling device connected to the superconducting transmission coil for cooling the superconducting transmission coil.
A wireless power receiving apparatus according to the present invention includes a superconducting receiver coil having a resonant frequency equal to that of a superconducting coil of a wireless power transmitter and receiving power from the superconducting coil using inter-coil frequency resonance, And a second conduction cooling device connected to the superconducting receiving coil for cooling the superconducting receiving coil. The second conduction cooling device includes a load coil for inducing electricity by the generated magnetic field when a magnetic field flows, and a second conduction cooling device for cooling the superconducting receiving coil.
In one embodiment, at least one of the superconducting coil and the copper coil is selected and used as the material of the source coil, the transmission coil, the reception coil, and the load coil used for the wireless power transmission.
As described above, the wireless power transmitting and receiving apparatus and the wireless power charging system using the same according to the present invention can improve the Q-factor value by using the superconducting coil having a resistance significantly lower than that of the normal conducting coil at the critical temperature. The wireless power transmitting / receiving apparatus and the wireless power charging system using the wireless power transmitting / receiving apparatus according to the present invention have an improved Q-factor, so that wireless power transmission of a large electric energy is possible.
The wireless power transmitting and receiving apparatus and the wireless power charging system using the same according to the present invention can maintain the critical temperature of the superconducting coil and reduce the size and weight of the wireless power transmission apparatus by using the conduction cooling type cooling apparatus.
The wireless power transmitting and receiving apparatus and the wireless power charging system using the same according to the present invention can be easily applied to a vehicle because of its small size and weight and can reduce the size and weight of the vehicle itself thereby improving the efficiency of the vehicle.
1 is a view illustrating a wireless power transmitting / receiving apparatus according to an embodiment of the present invention and a vehicle to which a wireless power charging system using the same is applied;
2 is a view showing the wireless power receiving apparatus of FIG. 1;
FIG. 3 is a schematic view schematically showing the wireless power transmitting / receiving apparatus of FIG. 1 and a wireless power charging system using the same.
4 is a view showing an S parameter when a copper coil is used;
5 is a view showing an S parameter when a superconducting coil is used;
Hereinafter, a detailed description of a wireless power transmitting / receiving apparatus and a wireless power charging system using the wireless power transmitting / receiving apparatus according to the present invention will be described.
1 is a view illustrating a wireless power transmitting and receiving apparatus according to an embodiment of the present invention and a vehicle to which a wireless power charging system using the same is applied.
1, the wireless power charging system includes a
The wireless power charging system may be roughly classified into a wireless power transmission apparatus including a
The
The wireless
Superconductor cooling methods include fluid circulation cooling and conduction cooling. The fluid circulation cooling method is a method of circulating the cryogenic fluid directly around the superconductor. Although the reliability of the cooling is high, the cryogenic pump and the heat exchanger are required to circulate the fluid. The housing surrounding the superconductor and the sealing need. The conduction cooling method is a method of directly connecting a refrigerator and a superconductor with a material having a high thermal conductivity. Although the reliability of the cooling is somewhat lower than that of the fluid circulation cooling method, the cooling system is simple. A wireless power transmitting and receiving apparatus and a wireless power charging system using the same according to an embodiment of the present invention can reduce the size and weight of a wireless power transmitting and receiving apparatus and a wireless power charging system using the same by cooling a superconducting coil using a conduction cooling apparatus, The space efficiency and the energy efficiency of the vehicle can be increased.
The wireless
The power received through the wireless
In one embodiment, the wireless
When the
FIG. 2 is a diagram showing a wireless power receiving apparatus of FIG. 1. FIG.
Referring to FIG. 2, the receiver coil of the
The
In one embodiment, the wireless
In another embodiment, the
The arrangement of the coils of the wireless
The source coil transmits power to the superconducting transmission coil in a magnetic induction manner. That is, when electricity is generated in the source coil and a magnetic field is generated, electricity is induced in the superconducting coil by the generated magnetic field. The first
In one embodiment, the wireless
In another embodiment, the source coil of the wireless
FIG. 3 is a schematic diagram illustrating a wireless power transmission / reception apparatus of FIG. 1 and a wireless power charging system using the same.
The wireless power transmission apparatus includes a
The wireless power receiving apparatus includes a wireless power receiving unit, and the wireless power receiving unit includes a receiving
The Q factor quality value Q of the wireless power transmission device and the reception device can be expressed by wL / R. By using the superconducting coil as the
Fig. 4 is a diagram showing S parameters when a copper coil is used, and Fig. 5 is a diagram showing S parameters when a superconducting coil is used.
The S parameter represents the ratio of the input voltage to the output voltage on the frequency distribution. 4 is a view showing S parameters when a copper coil is used as a
4 and 5, it is confirmed that the efficiency when the superconducting coil is used is very high because the transmission efficiency when the copper coil is used and the transmission efficiency when the superconducting coil is used are 60% and 90%, respectively .
The materials of the source coil, the transmission coil, the reception coil, and the load coil used for the wireless power transmission may be all superconducting coils or copper coils. When the coils are fabricated at the same resonant frequency, the superconducting coils and the copper coils Can be used.
While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.
110: Power supply
120: wireless power transmitter
122: Transmission coil
124: first conduction cooling device
130: Wireless power receiver
132: Receiving coil
134: second conduction cooling device
Claims (13)
A wireless power transmission unit connected to the power supply and wirelessly transmitting power;
A wireless power receiver for receiving power from the wireless power transmitter; And
And a battery connected to the wireless power receiver for charging electric power,
The wireless power transmission unit
A source coil connected to the power source;
A superconducting coil for inducing electricity by the generated magnetic field when electricity flows to the source coil to generate a magnetic field; And
And a first conduction cooling device connected to the superconducting transmission coil for cooling the superconducting transmission coil,
The wireless power receiver
A superconducting receiver coil having a resonant frequency equal to that of the superconducting coil of the wireless power transmitter and receiving power from the superconducting coil using inter-coil frequency resonance;
A load coil in which electricity is induced by the generated magnetic field when electricity flows through the superconducting receiver coil to generate a magnetic field; And
And a second conduction cooling device connected to the superconducting receiver coil for cooling the superconducting receiver coil
Wireless power charging system.
Wherein the superconducting transmission coil is spirally wound,
Wherein the source coil is arranged so as to surround the superconducting coil which is helically wound.
The wireless power transmission unit
A first temperature sensor for sensing a temperature of the superconducting coil; And
And a first controller for controlling the first conduction cooling apparatus so that the temperature of the superconducting transmission coil is kept below a critical temperature based on the temperature measured by the first temperature sensor.
Wherein the source coil is a superconducting coil,
Wherein the first conduction cooling device is connected to the superconducting source coil to cool the superconducting source coil.
Wherein the wireless power transmission unit is installed under the ground.
Wherein the superconducting receiver coil is wound in a spiral shape,
Wherein the load coil is arranged so as to surround the superconducting receiver coil spirally wound.
The wireless power receiver
A second temperature sensor for sensing the temperature of the superconducting receiver coil; And
And a second controller for controlling the second conduction cooling apparatus so that the temperature of the superconducting receiver coil is kept below a critical temperature based on the temperature measured by the second temperature sensor.
Wherein the load coil is a superconducting coil,
And the second conduction cooling device is connected to the superconducting rod coil to cool the superconducting rod coil.
Wherein the wireless power receiving unit is installed in a lower portion of the vehicle.
Wherein a magnetic shielding layer is provided on an upper portion of the wireless power transmission unit to shield a magnetic field flowing into the vehicle.
And a wireless power transmission unit connected to the power supply and wirelessly transmitting power,
The wireless power transmission unit
A source coil connected to the power source;
A superconducting coil for inducing electricity by the generated magnetic field when electricity flows to the source coil to generate a magnetic field; And
And a first conduction cooling device connected to the superconducting transmission coil for cooling the superconducting transmission coil
A wireless power transmission device.
A load coil in which electricity is induced by the generated magnetic field when electricity flows to the superconducting receiver coil to generate a magnetic field; And
And a second conduction cooling device connected to the superconducting receiver coil for cooling the superconducting receiver coil
Wireless power receiving device.
Wherein at least one of the superconducting coil and the copper coil is selected and used as the material of the source coil, the transmission coil, the reception coil and the load coil used for the wireless power transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/997,512 US20160211064A1 (en) | 2015-01-19 | 2016-01-16 | Wireless power charging apparatus using superconducting coil |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20150008702 | 2015-01-19 | ||
| KR1020150008702 | 2015-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20160089267A true KR20160089267A (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150184741A KR20160089267A (en) | 2015-01-19 | 2015-12-23 | Wireless power charging apparatus using superconducting coil |
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| KR (1) | KR20160089267A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190122973A (en) | 2018-04-23 | 2019-10-31 | 이현우 | Protective film for mobile phones |
| WO2020189887A1 (en) * | 2019-03-19 | 2020-09-24 | 오영준 | Coil-based electromagnetic wave resonance transfer device for improving energy efficiency |
| US12027875B2 (en) | 2019-03-19 | 2024-07-02 | Young Jun OH | Coil-based electromagnetic wave resonance transfer device for improving energy efficiency |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140093348A (en) | 2013-01-15 | 2014-07-28 | 삼성전자주식회사 | Wireless power transmission apparatus and wireless power reception apparatus |
-
2015
- 2015-12-23 KR KR1020150184741A patent/KR20160089267A/en not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140093348A (en) | 2013-01-15 | 2014-07-28 | 삼성전자주식회사 | Wireless power transmission apparatus and wireless power reception apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190122973A (en) | 2018-04-23 | 2019-10-31 | 이현우 | Protective film for mobile phones |
| WO2020189887A1 (en) * | 2019-03-19 | 2020-09-24 | 오영준 | Coil-based electromagnetic wave resonance transfer device for improving energy efficiency |
| US12027875B2 (en) | 2019-03-19 | 2024-07-02 | Young Jun OH | Coil-based electromagnetic wave resonance transfer device for improving energy efficiency |
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