KR20140129896A - Apparatus and method for transmitting and receiving wireless power - Google Patents
Apparatus and method for transmitting and receiving wireless power Download PDFInfo
- Publication number
- KR20140129896A KR20140129896A KR1020130048807A KR20130048807A KR20140129896A KR 20140129896 A KR20140129896 A KR 20140129896A KR 1020130048807 A KR1020130048807 A KR 1020130048807A KR 20130048807 A KR20130048807 A KR 20130048807A KR 20140129896 A KR20140129896 A KR 20140129896A
- Authority
- KR
- South Korea
- Prior art keywords
- wireless power
- time slot
- reception
- transmission
- power transmission
- Prior art date
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Classifications
-
- 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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5672—Multiplexing, e.g. coding, scrambling
- H04L2012/5675—Timeslot assignment, e.g. TDMA
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
The present invention relates to a wireless power transmission / reception device and a wireless power transmission / reception method, and more particularly, to a wireless power transmission / reception device that receives wireless power to charge a battery, transmits wireless power using the power of the charged battery, Receiving method.
Wireless power transmission technology is a technology that transmits power wirelessly between a power source and an electronic device. For example, in the wireless power transmission technology, a mobile terminal such as a smart phone or a tablet can be charged wirelessly only by placing the mobile terminal on a wireless charging pad. Thus, It can provide more excellent mobility, convenience, and safety. In addition to the wireless charging of mobile terminals, wireless power transmission technology has been attracting attention as a substitute for the existing wired power transmission environment in various fields of home appliances, electric vehicles, medical, leisure, and robots.
Wireless power transmission technology can be categorized as a technology using electromagnetic wave radiation and a technology using electromagnetic induction phenomenon. Techniques using electromagnetic wave radiation have limitations in efficiency due to the radiation loss consumed in the air. Recently, Many techniques using electromagnetic induction phenomena have been studied.
The wireless power transmission technology using the electromagnetic induction phenomenon is divided into an inductive coupling method and a resonant magnetic coupling method.
In the electromagnetic induction method, energy is transmitted by using a current induced in a receiving coil due to a magnetic field generated in a transmitting coil in accordance with electromagnetic coupling between a transmitting coil and a receiving coil. Although the electromagnetic induction type wireless power transmission technology has advantages of high transmission efficiency, it has a disadvantage in that the power transmission distance is limited to several millimeters, and the positional freedom is extremely low due to sensitivity to matching between coils.
Magnetic resonance method was proposed by Professor Marin Solarovich of MIT in 2005. It uses the phenomenon that the magnetic field is concentrated at both the transmission side and the reception side by the magnetic field applied at the resonance frequency between the transmission side coil and the reception side coil, Transmission.
This magnetic resonance method is capable of transmitting energy from a relatively long distance of several tens of centimeters to several meters as compared with the electromagnetic induction method, and it is also possible to transmit electric power to a plurality of devices at the same time, thereby realizing true cord-free It is expected to be implemented as a wireless power transmission technology.
However, in such a wireless power transmission technique, there is a limitation in the power transmission distance in any of the methods, and in the absence of the wireless power transmission device, power transmission is impossible.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless power transmission / reception device and a wireless power transmission / reception method capable of wireless power transmission / reception between devices that receive wireless power and charge a battery.
It is to be understood that the present invention is not limited to the above-described embodiments and that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the following claims .
According to an aspect of the present invention, there is provided a wireless communication device including: an antenna for receiving or transmitting wireless power using a magnetic field; A power receiving module for receiving wireless power through the antenna; A power transmitting module for transmitting wireless power through the antenna; And to set the reception timeslot and the transmission timeslot to divide a time interval, receive wireless power from the wireless power transmission device through the power reception module during the reception timeslot, And a controller for transmitting wireless power to the wireless power receiving apparatus through the wireless power receiving apparatus.
According to another aspect of the present invention, there is provided a method comprising: setting the reception time slot and the transmission time slot to divide a time interval; Receiving wireless power from the wireless power transmission device through the power receiving module during the reception time slot; And transmitting wireless power to the wireless power receiving apparatus through the power transmitting module during the transmission time slot.
It is to be understood that the solution of the problem of the present invention is not limited to the above-mentioned solution, and the solutions which are not mentioned can be clearly understood by those skilled in the art to which the present invention belongs There will be.
According to the present invention, it is possible to transmit and receive wireless power between devices that receive wireless power and charge a battery, thereby sharing power between devices when there is no wireless power transmission device.
According to the present invention, one wireless power receiving apparatus can transmit wireless power to another wireless power receiving apparatus while receiving wireless power.
The effects of the present invention are not limited to the above-mentioned effects, and the effects not mentioned can be clearly understood by those skilled in the art from the present specification and the accompanying drawings.
1 is a block diagram of a wireless power system in accordance with an embodiment of the present invention.
2 is a block diagram of a wireless power transmission apparatus according to an embodiment of the present invention.
3 is a block diagram of a wireless power receiving apparatus according to an embodiment of the present invention.
4 is a block diagram of a wireless power transceiver according to an embodiment of the present invention.
5 is a flowchart of a wireless power transmission / reception method according to an embodiment of the present invention.
6 is a flowchart of a wireless power transmission / reception method according to an embodiment of the present invention.
7 is a diagram illustrating an operation in which wireless power transmission is performed in a transmission time slot in a wireless power transmission / reception method according to an embodiment of the present invention.
8 is a diagram illustrating an operation in which wireless power reception is performed in a reception time slot in a wireless power transmission / reception method according to an embodiment of the present invention.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to be illustrative of the present invention and not to limit the scope of the invention. Should be interpreted to include modifications or variations that do not depart from the spirit of the invention.
The terms and accompanying drawings used herein are for the purpose of facilitating the present invention and the shapes shown in the drawings are exaggerated for clarity of the present invention as necessary so that the present invention is not limited thereto And are not intended to be limited by the terms and drawings.
In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
According to an aspect of the present invention, there is provided a wireless communication device including: an antenna for receiving or transmitting wireless power using a magnetic field; A power receiving module for receiving wireless power through the antenna; A power transmitting module for transmitting wireless power through the antenna; And to set the reception timeslot and the transmission timeslot to divide a time interval, receive wireless power from the wireless power transmission device through the power reception module during the reception timeslot, And a controller for transmitting wireless power to the wireless power receiving apparatus through the wireless power receiving apparatus.
And a communication module for performing communication with the wireless power transmission apparatus and the wireless power receiving apparatus, wherein the wireless communication apparatus transmits scheduling information including information on the reception time slot and the transmission time slot to the wireless transmission apparatus through the communication module, To the power transmission device and the wireless power receiving device.
The wireless power transmission apparatus may transmit wireless power during the reception time slot based on the scheduling information, and the wireless power reception apparatus may receive wireless power during the transmission time slot based on the scheduling information .
The controller may set the reception time slot and the transmission time slot length based on the battery state of the wireless power transmission / reception device.
The controller may set a relative size of the transmission time slot to the reception time slot to be small if the battery state is a low power state and set a relative size of the transmission time slot to the reception time slot when the battery state is a high power state, Can be set to be largely small.
And a communication module for performing communication with the wireless power transmission device and the wireless power reception device, wherein the controller receives the device profile of the wireless power reception device through the communication module, The length of the reception time slot and the length of the transmission time slot can be set.
The device profile may include information on the battery status of the wireless power receiving apparatus.
The controller sets the relative size of the transmission time slot for the reception time slot to be large if the battery state of the wireless power transmission / reception device is more charged than the battery state of the wireless power reception device, The relative size of the transmission time slot for the reception time slot can be set small if the battery state of the wireless power transmission / reception device is charged to be less than the battery state of the wireless power reception device.
According to another aspect of the present invention, there is provided a method comprising: setting the reception time slot and the transmission time slot to divide a time interval; Receiving wireless power from the wireless power transmission device through the power receiving module during the reception time slot; And transmitting wireless power to the wireless power receiving apparatus through the power transmitting module during the transmission time slot.
And transmitting the scheduling information including the reception time slot and the transmission time slot to the wireless power transmission apparatus and the wireless power reception apparatus.
The wireless power transmission apparatus may transmit wireless power during the reception time slot based on the scheduling information, and the wireless power reception apparatus may receive wireless power during the transmission time slot based on the scheduling information .
In the setting of the time slot, the length of the reception time slot and the transmission time slot may be set based on the battery state of the wireless power transmission / reception device.
In the setting of the time slot, if the battery state is a low power state, a relative size of the transmission time slot with respect to the reception time slot is set small, and when the battery state is a high power state, The relative size of the time slot can be set to be largely small.
Receiving the device profile of the wireless power receiving apparatus, and setting the time slot, the length of the receiving time slot and the transmitting time slot may be set considering the device profile .
The device profile may include information on the battery status of the wireless power receiving apparatus.
In the setting of the time slot, if the battery state of the wireless power transmission / reception device is more charged than the battery state of the wireless power reception device, the relative size of the transmission time slot for the reception time slot is And the relative size of the transmission timeslot with respect to the reception time slot can be set small if the battery state of the wireless power transmission / reception device is charged to be less than the battery state of the wireless power reception device.
Hereinafter, a
The
1 is a block diagram of a
Referring to FIG. 1, a
1, power is transmitted from the wireless
Also, in the
Here, the wireless
In addition, the wireless
In the
1, a wireless
Although not shown in FIG. 1, the
Hereinafter, a wireless
The wireless
2 is a block diagram of a wireless
Referring to FIG. 2, the wireless
The
The AC-
The
The
The
Transmit
Although not shown in FIG. 2, the wireless
The
The in-band communication module can transmit and receive information using a magnetic wave having a specific frequency as a center frequency. For example, the
The out-band communication module may perform out-band communication through a communication antenna. For example, the
The
The
Hereinafter, a wireless
The wireless power receiving apparatus () can receive power wirelessly.
3 is a block diagram of a wireless
3, the wireless
The receiving
The
The
The
The DC-
The
Although not shown in FIG. 3, the wireless
The
The in-band communication module can transmit and receive information using a magnetic wave having a specific frequency as a center frequency. For example, the
The out-band communication module may perform out-band communication through a communication antenna. For example, the
The
The
4 is a block diagram of a
4, the wireless power transmission /
The transmitting and receiving
The
The
The
The
Hereinafter, a process of wirelessly transmitting power in the
The wireless power is transmitted from the wireless
The wireless transmission of electric power can be performed using an electromagnetic induction method or a magnetic resonance method. At this time, it may be performed between the
When a magnetic resonance method is used, the transmitting
The transmission of energy between the transmitting
The electromagnetic induction method can be implemented similarly to the magnetic resonance method, but the frequency of the magnetic field does not have to be the resonance frequency at this time. Instead, in the electromagnetic induction method, matching between the loops constituting the receiving
Hereinafter, a method of transmitting / receiving a wireless power according to an embodiment of the present invention will be described. The wireless power transmission / reception method will be described using the
5 is a flowchart of a wireless power transmission / reception method according to an embodiment of the present invention.
5, a wireless power transmission / reception method includes receiving (S110) wireless power from a wireless
Hereinafter, each of the above-described steps will be described in detail with reference to FIG. 6 is a flowchart of a wireless power transmission / reception method according to an embodiment of the present invention.
Referring to FIG. 6, the wireless power transmission /
The
The
The wireless power transmission /
If it is determined that the wireless power transmission /
For example, if the battery of the wireless power transmission /
Meanwhile, the length and the ratio of the transmission / reception time slots can be dynamically adjusted when the battery state changes according to wireless power transmission / reception.
The
The wireless power transmission /
The wireless power transmission /
7 is a diagram illustrating an operation in which wireless power transmission is performed in a transmission time slot in a wireless power transmission / reception method according to an embodiment of the present invention.
The
8 is a diagram illustrating an operation in which wireless power reception is performed in a reception time slot in a wireless power transmission / reception method according to an embodiment of the present invention.
The wireless
As the transmission time slot and the reception time slot are alternately performed at regular intervals, the wireless power transmission /
7 and 8, when the wireless
The wireless power transmission / reception method according to the embodiment of the present invention is not essential, so that the wireless power transmission / reception method may be performed including some or all of the above-described steps. Embodiments of the above-described wireless power transmission / reception method may also be performed in combination with each other. It is also to be understood that each of the above-described steps is not necessarily performed in the order described, and that the steps described later may be performed before the steps described earlier.
The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments of the present invention described above can be implemented separately or in combination.
Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.
1000: Wireless power system
1100: Wireless power transmission device
1110: Power transmission module
1111: AC-DC converter
1112: Frequency oscillator
1113: Power amplifier
1114: Impedance matching device
1120: Transmission antenna
1130: Communication module
1140: Controller
1200: wireless power receiving device
1210: Receive antenna
1220: Power receiving module
1221: Impedance matcher
1222: Rectifier
1223: DC-DC converter
1224: Battery
1230: Communication module
1240: Controller
1300: Wireless power transmitter / receiver
1310: Transmitting / receiving antenna
1320: Power receiving module
1330: Power transmission module
1334: Battery
1340: Communication module
1350: Controller
Claims (16)
A power receiving module for receiving wireless power through the antenna;
A power transmitting module for transmitting wireless power through the antenna; And
Set the reception time slot and the transmission time slot to divide a time interval, receive wireless power from the wireless power transmission device through the power reception module during the reception time slot, and transmit the power transmission module during the transmission time slot And a controller for transmitting the wireless power to the wireless power receiving device
Wireless power transceiver.
And a communication module for performing communication with the wireless power transmission device and the wireless power reception device,
And transmitting scheduling information including information on the reception time slot and the transmission time slot to the wireless power transmission apparatus and the wireless power reception apparatus through the communication module
Wireless power transceiver.
Wherein the wireless power transmission apparatus transmits wireless power during the reception time slot based on the scheduling information,
Wherein the wireless power receiving apparatus receives wireless power during the transmission time slot based on the scheduling information
Wireless power transceiver.
Wherein the controller sets a length of the reception time slot and the transmission time slot based on a battery state of the wireless power transmission /
Wireless power transceiver.
Wherein the controller sets a relative size of the transmission time slot to the reception time slot to be small if the battery state is a low power state and sets a relative size of the transmission time slot to the reception time slot when the battery state is a high power state Largely set
Wireless power transceiver.
And a communication module for performing communication with the wireless power transmission device and the wireless power reception device,
The controller receives the device profile of the wireless power receiving apparatus through the communication module and sets the length of the receiving time slot and the transmission time slot considering the device profile further
Wireless power transceiver.
Wherein the device profile includes information about a battery state of the wireless power receiving apparatus
Wireless power transceiver.
The controller sets a relative size of the transmission time slot for the reception time slot to a larger value if the battery state of the wireless power transmission / reception device is more charged than the battery state of the wireless power reception device, If the battery state of the power transmission / reception device is charged to be less than the battery state of the wireless power reception device, the relative size of the transmission time slot for the reception time slot is set to be small
Wireless power transceiver.
Receiving wireless power from the wireless power transmission device through the power receiving module during the reception time slot; And
And transmitting wireless power to the wireless power receiving device through the power transmitting module during the transmission time slot
Wireless power transmission / reception method.
And transmitting scheduling information to the wireless power transmission apparatus and the wireless power reception apparatus, the scheduling information including information on the reception time slot and the transmission time slot
Wireless power transmission / reception method.
Wherein the wireless power transmission apparatus transmits wireless power during the reception time slot based on the scheduling information,
Wherein the wireless power receiving apparatus receives wireless power during the transmission time slot based on the scheduling information
Wireless power transmission / reception method.
And setting a length of the reception time slot and the transmission time slot based on a battery state of the wireless power transmission / reception device
Wireless power transmission / reception method.
Wherein, when the battery state is a low power state, a relative size of the transmission time slot with respect to the reception time slot is set to be small, and when the battery state is a high power state, the transmission time To set the relative size of the slot to be very small
Wireless power transmission / reception method.
Further comprising receiving a device profile of the wireless power receiving apparatus,
In setting the time slot, a length of the reception time slot and the transmission time slot are set considering the device profile further
Wireless power transmission / reception method.
Wherein the device profile includes information about a battery state of the wireless power receiving apparatus
Wireless power transmission / reception method.
Wherein the setting of the time slot is such that if the battery state of the wireless power transmission / reception device is more charged than the battery state of the wireless power reception device, the relative size of the transmission time slot for the reception time slot is increased And sets the relative size of the transmission time slot for the reception time slot to be small if the battery state of the wireless power transmission / reception device is charged to be less than the battery state of the wireless power reception device
Wireless power transceiver.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020130048807A KR20140129896A (en) | 2013-04-30 | 2013-04-30 | Apparatus and method for transmitting and receiving wireless power |
PCT/KR2014/003628 WO2014178575A1 (en) | 2013-04-30 | 2014-04-25 | Wireless power transmitting and receiving apparatus and method therefor |
Applications Claiming Priority (1)
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KR1020130048807A KR20140129896A (en) | 2013-04-30 | 2013-04-30 | Apparatus and method for transmitting and receiving wireless power |
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KR20140129896A true KR20140129896A (en) | 2014-11-07 |
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KR1020130048807A KR20140129896A (en) | 2013-04-30 | 2013-04-30 | Apparatus and method for transmitting and receiving wireless power |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20190006641A (en) * | 2017-07-11 | 2019-01-21 | 울산과학기술원 | Apparatus and method for wireless charging |
-
2013
- 2013-04-30 KR KR1020130048807A patent/KR20140129896A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20190006641A (en) * | 2017-07-11 | 2019-01-21 | 울산과학기술원 | Apparatus and method for wireless charging |
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