KR20140077800A - Wireless power transmitting apparatus and method - Google Patents
Wireless power transmitting apparatus and method Download PDFInfo
- Publication number
- KR20140077800A KR20140077800A KR1020120146956A KR20120146956A KR20140077800A KR 20140077800 A KR20140077800 A KR 20140077800A KR 1020120146956 A KR1020120146956 A KR 1020120146956A KR 20120146956 A KR20120146956 A KR 20120146956A KR 20140077800 A KR20140077800 A KR 20140077800A
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- power
- wireless power
- power transmission
- transmission
- operation mode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- 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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
The technical field of the present invention relates to a wireless power transmission apparatus and method.
In the 1800s, electric motors and transformers using electromagnetic induction principles began to be used, and then radio waves and lasers were used to transmit the electric energy to the desired devices wirelessly. A method of transmitting electrical energy by radiating the same electromagnetic wave has also been attempted. Our electric toothbrushes and some wireless shavers are actually charged with electromagnetic induction. Electromagnetic induction is a phenomenon in which a voltage is induced and a current flows when a magnetic field is changed around a conductor. The electromagnetic induction method is rapidly commercialized mainly in small-sized devices, but there is a problem in that the transmission distance of electric power is short.
Up to now, the energy transmission system by radio system includes electromagnetic induction, self-resonance and remote transmission using short-wave radio frequency.
In recent years, among such wireless power transmission techniques, energy transmission using self resonance is widely used.
In the wireless power transmission system using self-resonance, since the electric signals formed on the transmission side and the reception side are wirelessly transmitted through the coil, the user can easily charge electronic devices such as portable devices.
The wireless power transmission apparatus generates and transmits AC power having a resonance frequency to the wireless power receiving apparatus. At this time, the power transmission efficiency is determined by various causes. There is a growing demand for increased wireless power transmission efficiency.
SUMMARY OF THE INVENTION The present invention provides a wireless power transmission apparatus and method capable of improving wireless power transmission efficiency.
An embodiment of the present invention provides a wireless power transmission apparatus for transmitting wireless power to a wireless power receiving apparatus, the wireless power transmission apparatus comprising: an AC power generating unit that operates in a half bridge operation mode and a full bridge operation mode and generates square wave shaped power using first DC power; ; And a transmission induction coil for transmitting the square wave power to the transmission resonance coil by electromagnetic induction.
An embodiment of the present invention is directed to a wireless power transmission apparatus for transmitting wireless power to a wireless power receiving apparatus, comprising: a transmission induction coil for transmitting an applied electric power to a transmission resonant coil by electromagnetic induction; And a transistor circuit portion of a full bridge structure connected to the transmission induction coil.
The embodiment further provides a wireless power transmission method for transmitting wireless power to a wireless power receiving apparatus, comprising: determining one of a half bridge operation mode and a full bridge operation mode; Generating square wave shaped power using the first direct current power according to the determined operation mode; And transmitting the square wave power through a part of the transmission induction coil to the transmission resonance coil by electromagnetic induction.
According to embodiments of the present invention, the efficiency of a wireless power transmission apparatus can be increased.
Further, according to the embodiment of the present invention, circuit breakage due to high current can be prevented.
1 is a diagram for explaining a wireless power transmission system according to an embodiment of the present invention.
2 is an equivalent circuit diagram of a transmission induction coil according to an embodiment of the present invention.
3 is an equivalent circuit diagram of a power supply apparatus and a wireless power transmission apparatus according to an embodiment of the present invention.
4 is an equivalent circuit diagram of a wireless power receiving apparatus according to an embodiment of the present invention.
5 shows a block diagram of a power supply according to an embodiment of the present invention.
6 is a block diagram of an AC power generation unit and a transmission power control unit according to an embodiment of the present invention.
7 is a circuit diagram of a DC-DC converter according to an embodiment of the present invention.
8 is a circuit diagram of a DC-AC converting unit and a power transmission state sensing unit according to an embodiment of the present invention.
9 shows a flow chart of a wireless power transmission method according to an embodiment of the present invention.
10 shows a waveform diagram of nodes in a power supply apparatus according to an embodiment of the present invention.
11 shows a block diagram of a power supply according to another embodiment of the present invention.
12 is a block diagram of an AC power generation unit and a transmission power control unit according to another embodiment of the present invention.
13 is a circuit diagram of a DC-AC converting unit and a power transmission state sensing unit according to another embodiment of the present invention.
14 shows a flowchart of a wireless power transmission method according to another embodiment of the present invention.
15 shows a waveform diagram of nodes in a power supply device according to another embodiment of the present invention.
Figure 16 shows a block diagram of a power supply according to another embodiment of the present invention.
FIG. 17 is a block diagram of an AC power generation unit and a transmission power control unit according to another embodiment of the present invention.
18 is a circuit diagram of a DC-AC converting unit and a power transmission state sensing unit according to another embodiment of the present invention.
FIG. 19 shows a flowchart of a wireless power transmission method according to another embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.
Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.
Hereinafter, a wireless power transmission system according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG.
1 is a diagram for explaining a wireless power transmission system according to an embodiment of the present invention.
Referring to FIG. 1, a wireless power transmission system may include a
In one embodiment, the
The wireless
The wireless
Both ends of the
The transmission
The reception
Both ends of the reception
The power generated by the
More specifically, the power transmission process will be described below.
The
The transmission-inducing
Thereafter, the power transmitted to the transmission
Power can be transmitted by resonance between two LC circuits whose impedance is matched. Such resonance-based power transmission enables power transmission to be carried out farther than the power transmission by electromagnetic induction with higher efficiency.
The reception
The transmission
The transmission
Specifically, the transmission
The power transmission efficiency between the wireless
In wireless power transmission, quality factor and coupling coefficient have important meaning. That is, the power transmission efficiency can be improved as the quality index and coupling coefficient have larger values.
The quality factor may mean an index of energy that can be accumulated in the vicinity of the wireless
The quality factor may vary depending on the operating frequency (w), the shape of the coil, the dimensions, and the material. The quality index can be expressed as a formula Q = w * L / R. L is the inductance of the coil, and R is the resistance corresponding to the amount of power loss occurring in the coil itself.
The quality factor can have a value from 0 to infinity. The larger the quality index, the higher the power transmission efficiency between the wireless
Coupling coefficient means the degree of magnetic coupling between the transmitting coil and the receiving coil, and ranges from 0 to 1.
The coupling coefficient may vary depending on the relative position or distance between the transmitting coil and the receiving coil.
2 is an equivalent circuit diagram of a transmission
2, the transmission
The transmission
The capacitor C1 may be a variable capacitor, and the impedance matching may be performed as the capacitance of the capacitor C1 is adjusted. The equivalent circuit of the transmission
3 is an equivalent circuit diagram of a
As shown in FIG. 3, the transmission-inducing
4 is an equivalent circuit diagram of a wireless
As shown in FIG. 4, the reception
The rectifying
Specifically, the rectifying
The rectifier can convert the DC power to the AC power received from the reception
The smoothing circuit can output smooth DC power by removing the AC component included in the DC power converted in the rectifier. In one embodiment, the smoothing circuit may be, but need not be, a rectifying capacitor C5, as shown in Fig.
The
The wireless
The wireless
In band communication may refer to a communication in which information is exchanged between a wireless
Specifically, the wireless
More specifically, when the switch is opened, the power absorbed by the resistor becomes zero, and the power consumed by the wireless
If the switch is shorted, the power absorbed by the resistor is greater than zero, and the power consumed by the wireless
The wireless
Conversely, it is also possible to transmit the state information of the wireless
Next, out-of-band communication will be described.
Out-of-band communication refers to communication in which information necessary for power transmission is exchanged by using a separate frequency band instead of the resonance frequency band. The wireless
Next, a
5 shows a block diagram of a power supply according to an embodiment of the present invention.
5, the
The
The
The power transmission
The transmission
The AC
The wireless
6 is a block diagram of an AC power generation unit and a transmission power control unit according to an embodiment of the present invention.
6, the AC
The AC power
The DC power
The
The DC-
The DC-
7 is a circuit diagram of a DC-DC converter according to an embodiment of the present invention.
As shown in FIG. 7, the DC-
One end of the inductor L11 is connected to the output terminal of the
The gate electrode of the power switch T11 is connected to the node A, which is the output terminal of the direct current power
The anode electrode of the diode D11 is connected to the drain electrode of the power switch T11, and the cathode electrode is connected to the node B.
One end of the capacitor C11 is connected to the cathode electrode of the diode D11, and the other end is connected to the ground.
8 is a circuit diagram of a DC-AC converting unit and a power transmission state sensing unit according to an embodiment of the present invention.
8, the half-bridge transistor circuit portion includes an upper transistor T21, a lower transistor T22, a DC blocking capacitor C21, And is connected to the AC power
The AC power
The drain electrode of the upper transistor T21 is connected to one end of the resistor R1 and the gate electrode is connected to the upper transistor control signal output terminal of the AC power
The drain electrode of the lower transistor T22 is connected to the source electrode of the upper transistor T21, the gate electrode of the lower transistor T22 is connected to the output terminal of the lower transistor control signal of the AC power
One end of the DC blocking capacitor C21 is connected to the source electrode of the upper transistor T21 and is connected to one end of the transmission induction coil L1. The other end of the transmission induction coil L1 is connected to the ground.
The voltage
Next, a wireless power transmission method according to an embodiment of the present invention will be described with reference to FIGS. 9 and 10. FIG.
FIG. 9 shows a flowchart of a wireless power transmission method according to an embodiment of the present invention, and FIG. 10 shows a waveform diagram of nodes in a power supply apparatus according to an embodiment of the present invention.
In particular, FIG. 9 is a wireless power transmission method embodying the embodiments of FIGS. 6-8.
The
The
The power transmission
The coupling coefficient varies depending on the distance or the relative position between the wireless
Since the output current of the dc-
The direct current power
In one embodiment, the voltage
In another embodiment, the
At this time, the voltage
In another embodiment, the
Table 2 shows a look-up table according to an embodiment of the present invention.
As shown in Table 2, the
When the DC-
If the magnitude of the output current of the DC-
Then, when the magnitude of the output voltage of the DC-
If the magnitude of the output current of the DC-
In the above example, the distance between the wireless
In this way, the wireless
The DC-
The AC power
An upper transistor control signal and a lower transistor control signal will be described with reference to FIG.
As shown in FIG. 10, the upper transistor control signal and the lower transistor control signal are square waves.
One period of the upper transistor control signal sequentially includes a turn-on time slot of the upper transistor T21 and a turn-off time slot of the upper transistor T21. The turn-on time slot of the upper transistor T21 corresponds to the half period of the small power sine wave of the
One period of the lower transistor control signal sequentially includes a turn-on time slot of the lower transistor T22 and a turn-off time slot of the lower transistor T22. The turn-on time slot of the lower transistor T22 corresponds to the half period of the low power sine wave and the turn off time slot of the lower transistor T22 corresponds to the remaining half period of the low power sine wave.
In the turn-on time slot of the upper transistor T21, the upper transistor control signal has a level for turning on the upper transistor T21. The level for turning on the upper transistor T21 may be a high level.
The upper transistor control signal in the turn-off time slot of the upper transistor T21 has a level for turning off the upper transistor T21. The level for turning off the upper transistor T21 may be a low level.
In the turn-on time slot of the lower transistor T22, the lower transistor control signal has a level for turning on the lower transistor T22. The level for turning on the lower transistor T22 may be a high level.
In the turn-off time slot of the lower transistor T22, the lower transistor control signal has a level for turning off the upper transistor T22. The level for turning off the lower transistor T22 may be a low level.
In the turn-on time slot of the upper transistor T21, the lower transistor control signal of the turn-off time slot of the lower transistor T22 has a level for turning off the lower transistor T22.
In the turn-on time slot of the lower transistor T22, the lower transistor control signal of the turn-off time slot of the upper transistor T21 has a level for turning off the lower transistor T22.
The upper transistor control signal and the lower transistor control signal may have a dead time slot to prevent a short circuit due to simultaneous turn-on of the upper transistor T21 and the lower transistor T22.
The turn-on time slot of the upper transistor T21 has a time length of (50-a)% of one period (T), and the dead time of the upper transistor T21 The slot has a time length of a% of one period T, the turn-off time slot of the upper transistor T21 has a time length of 50%, the turn-on time slot of the lower transistor T22 has one time period T, The dead time slot of the lower transistor T22 has a time length of a% of one period T and the turn-off time slot of the lower transistor T22 has a time length of 50% Lt; / RTI > For example, where a may be 1%.
The DC-
The operation of the DC-
The upper transistor T21 and the lower transistor T22 output square-wave power having the square-wave voltage V3 as shown in Fig. 10 by the upper transistor control signal having the dead time slot and the lower transistor control signal.
The DC blocking capacitor C21 cuts off the DC voltage of the square wave power and outputs the rectangular wave AC power having the square wave AC voltage V4 to the transmission
The wireless
Next, a
11 shows a block diagram of a power supply according to another embodiment of the present invention.
11, the
The
The
The power transmission
The transmission
The ac
The wireless
12 is a block diagram of an AC power generation unit and a transmission power control unit according to another embodiment of the present invention.
12, the AC
The AC power
The DC-
13 is a circuit diagram of a DC-AC converting unit and a power transmission state sensing unit according to another embodiment of the present invention.
As shown in FIG. 13, the DC-
The power transmission
The AC power
The drain electrode of the upper transistor T41 is connected to one end of the resistor R1 and the gate electrode thereof is connected to the first upper transistor control signal output terminal of the AC power
The drain electrode of the lower transistor T42 is connected to the source electrode of the upper transistor T41, the gate electrode is connected to the first lower transistor control signal output terminal of the AC power
The drain electrode of the upper transistor T44 is connected to one end of the resistor R1 and the gate electrode is connected to the output terminal of the second upper transistor control signal of the AC power
The drain electrode of the lower transistor T43 is connected to the source electrode of the upper transistor T44 and the gate electrode of the lower transistor T43 is connected to the output terminal of the second lower transistor control signal of the ac power
The voltage
Next, a wireless power transmission method according to another embodiment of the present invention will be described with reference to FIG. 14 and FIG.
FIG. 14 shows a flowchart of a wireless power transmission method according to another embodiment of the present invention, and FIG. 15 shows a waveform diagram of nodes in a power supply apparatus according to another embodiment of the present invention.
In particular, Figure 14 is a wireless power transmission method embodying the embodiments of Figures 11-13.
The
The
The power transmission
The AC power
In one embodiment, the AC power
At this time, the reference value may be the appropriate current range of Table 2 set according to the initial output voltage value.
When the measured output current value is larger than the reference value, the DC power
In the half-bridge operation mode, the AC power
In the full bridge operation mode, the AC power
In another embodiment, the voltage
If the measured output power value is larger than the reference value, the DC power
The DC-
The wireless
Next, a
Figure 16 shows a block diagram of a power supply according to another embodiment of the present invention.
16, the
The
The
The power transmission
The transmission
The ac
The wireless
FIG. 17 is a block diagram of an AC power generation unit and a transmission power control unit according to another embodiment of the present invention.
17, the AC
The direct-current power
The
The DC-
The AC power
The DC-
18 is a circuit diagram of a DC-AC converting unit and a power transmission state sensing unit according to another embodiment of the present invention.
As shown in Fig. 18, the dc-
The power transmission
The AC power
The drain electrode of the upper transistor T61 is connected to one end of the resistor R1 and the gate electrode thereof is connected to the first upper transistor control signal output terminal of the AC power
The drain electrode of the lower transistor T62 is connected to the source electrode of the upper transistor T61 and the gate electrode of the lower transistor T62 is connected to the output terminal of the first lower transistor control signal of the ac power
The drain electrode of the upper transistor T64 is connected to one end of the resistor R1 and the gate electrode is connected to the output terminal of the second upper transistor control signal of the AC power
The drain electrode of the lower transistor T63 is connected to the source electrode of the upper transistor T64 and the gate electrode of the lower transistor T63 is connected to the output terminal of the second lower transistor control signal of the ac power
The voltage
Next, a wireless power transmission method according to another embodiment of the present invention will be described with reference to FIG.
FIG. 19 shows a flowchart of a wireless power transmission method according to another embodiment of the present invention.
In particular, Figure 19 is a wireless power transmission method embodying the embodiments of Figures 16-18.
The
The
The power transmission
The direct current power
The DC-
The AC power
The DC-
The wireless
The features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (20)
An alternating-current power generation unit operating in a half-bridge operation mode and a full-bridge operation mode, the alternating-current power generation unit generating square-shaped power using the first direct-current power; And
And a transmission induction coil for transmitting the square wave power to the transmission resonance coil by electromagnetic induction
A wireless power transmission device.
Wherein the AC power generating unit includes a transistor circuit part of a full bridge structure connected to the transmission induction coil
A wireless power transmission device.
Further comprising a transmission power control unit for determining one of the half bridge operation mode and the full bridge operation mode and for generating an AC power generation control signal corresponding to the determined operation mode and providing the AC power generation control signal to the transistor circuit unit
A wireless power transmission device.
Further comprising a sensing unit for sensing a wireless power transmission state between the wireless power transmission apparatus and the wireless power reception apparatus,
The transmission power control section
Wherein the transmission power control unit determines one of the half bridge operation mode and the full bridge operation mode based on the sensed radio power transmission state
A wireless power transmission device.
The AC power generating unit
A DC-DC converter for converting the first DC power into a second DC power;
And a DC-AC converting unit that operates in the half bridge operation mode and the full bridge operation mode and converts the second DC power into the square wave power
A wireless power transmission device.
Further comprising a sensing unit for sensing a wireless power transmission state between the wireless power transmission apparatus and the wireless power reception apparatus,
The transmission power control section
And a DC power generation control unit for generating a DC power generation control signal based on the sensed wireless power transmission state,
And the DC-DC converter converts the first DC power into the second DC power based on the DC power generation control signal
A wireless power transmission device.
The DC power generation control unit changes the duty ratio of the DC power generation control signal based on the sensed radio power transmission state
A wireless power transmission device.
Wherein the DC power generation control unit obtains a target output voltage corresponding to the sensed radio power transmission state from a lookup table and changes the duty ratio so that the voltage of the second DC power reaches the target output voltage
A wireless power transmission device.
Further comprising a sensing unit for sensing a wireless power transmission state between the wireless power transmission apparatus and the wireless power reception apparatus,
The sensing unit senses the wireless power transmission state based on the magnitude of the current of the transmission power
A wireless power transmission device.
The sensing unit senses the wireless power transmission state based on a peak-to-peak magnitude of the current of the transmission power
A wireless power transmission device.
A transmission induction coil for transmitting the applied electric power to the transmission resonance coil by electromagnetic induction; And
And a transistor circuit portion of a full bridge structure connected to the transmission induction coil
A wireless power transmission device.
A sensing unit for sensing a wireless power transmission state between the wireless power transmission apparatus and the wireless power reception apparatus;
And a transmission power control section for controlling the transistor circuit section of the full bridge structure based on the sensed wireless power transmission state
A wireless power transmission device.
Wherein the transistor circuit portion of the full bridge structure operates in one of the half bridge operation mode and the full bridge operation mode,
Wherein the transmission power control unit determines one of the half bridge operation mode and the full bridge operation mode based on the sensed radio power transmission state and controls the transistor circuit unit according to the determined operation mode
A wireless power transmission device.
The transistor circuit portion of the full bridge structure
A first transistor including a drain electrode to which DC power is applied and a source electrode connected to one end of the transmission induction coil;
A second transistor including a drain electrode connected to the source electrode of the first transistor and a source electrode connected to the ground;
A third transistor including a drain electrode to which the DC power is applied and a source electrode connected to the other end of the transmission induction coil; And
And a fourth transistor including a drain electrode connected to the source electrode of the third transistor and a source electrode connected to the ground
A wireless power transmission device.
In the half bridge operation mode, the transmission power control section
The third transistor is turned off,
The fourth transistor is turned on,
The first transistor is turned on and the second transistor is turned off in half of one period,
Turning off the first transistor and turning on the second transistor in the other half of the period
A wireless power transmission device.
In the full bridge operation mode, the transmission power control section
Turning on the first and fourth transistors and turning off the second and third transistors at half of one period,
And turning off the first and fourth transistors and turning on the second and third transistors in the other half period
A wireless power transmission device.
Determining one of a half bridge operation mode and a full bridge operation mode;
Generating square wave shaped power using the first direct current power according to the determined operation mode; And
And transmitting the square wave shaped power through a part of the transmission induction coil to the transmission resonance coil by electromagnetic induction
Wireless power transmission method.
Wherein generating the square wave shaped power comprises:
Generating an AC power generation control signal corresponding to the determined operation mode;
Generating the square wave power based on the ac power generation control signal
Wireless power transmission method.
Further comprising sensing a wireless power transmission state between the wireless power transmission apparatus and the wireless power reception apparatus,
Wherein determining one of the half bridge operation mode and the full bridge operation mode comprises:
And determining one of the half bridge operation mode and the full bridge operation mode based on the sensed wireless power transmission state
Wireless power transmission method.
Determining a duty ratio based on the sensed wireless power transmission state;
Generating a DC power generation control signal according to the duty ratio;
Wherein generating the square wave shaped power comprises:
Converting the first direct current power into second direct current power based on the direct current power generation control signal;
And converting the second direct current power into the square wave power in the determined operation mode
Wireless power transmission method.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120146956A KR102019079B1 (en) | 2012-12-14 | 2012-12-14 | Wireless power transmitting apparatus and method |
| US13/826,526 US9225391B2 (en) | 2012-03-19 | 2013-03-14 | Wireless power transmitting apparatus and method thereof |
| EP13159585.2A EP2642628B1 (en) | 2012-03-19 | 2013-03-15 | Wireless power transmitting apparatus and method thereof |
| JP2013053241A JP5643362B2 (en) | 2012-03-19 | 2013-03-15 | Wireless power transmission apparatus and method |
| EP18155272.0A EP3340419B1 (en) | 2012-03-19 | 2013-03-15 | Wireless power transmitting apparatus and method thereof |
| CN201310088465.2A CN103326475B (en) | 2012-03-19 | 2013-03-19 | Wireless power transmission apparatus and method thereof |
| JP2014221116A JP6153506B2 (en) | 2012-03-19 | 2014-10-30 | Wireless power transmission apparatus and method |
| US14/980,904 US9711974B2 (en) | 2012-03-19 | 2015-12-28 | Wireless power transmitting apparatus and method thereof |
| US16/510,270 USRE49017E1 (en) | 2012-03-19 | 2019-07-12 | Wireless power transmitting apparatus and method thereof |
| US17/675,619 USRE49955E1 (en) | 2012-03-19 | 2022-02-18 | Wireless power transmitting apparatus and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120146956A KR102019079B1 (en) | 2012-12-14 | 2012-12-14 | Wireless power transmitting apparatus and method |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020190095023A Division KR20190096888A (en) | 2019-08-05 | 2019-08-05 | Wireless power transmitting apparatus and method |
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| KR20140077800A true KR20140077800A (en) | 2014-06-24 |
| KR102019079B1 KR102019079B1 (en) | 2019-09-06 |
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| KR1020120146956A KR102019079B1 (en) | 2012-03-19 | 2012-12-14 | Wireless power transmitting apparatus and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160063004A (en) * | 2014-11-26 | 2016-06-03 | 에스엘 주식회사 | Apparatus for wireless power transmission |
| KR102204344B1 (en) * | 2020-06-29 | 2021-01-18 | 김선호 | Multi concentric plug with wireless charging function for mobile devices |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10136653A (en) * | 1996-10-28 | 1998-05-22 | Sony Corp | Power unit |
| JP2011091991A (en) * | 2009-08-17 | 2011-05-06 | Schleifring & Apparatebau Gmbh | Controlled contactless power transmission capable of estimating load state |
| JP2011135760A (en) * | 2009-11-30 | 2011-07-07 | Tdk Corp | Wireless power supply device, wireless power receiver, and wireless power transmission system |
-
2012
- 2012-12-14 KR KR1020120146956A patent/KR102019079B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10136653A (en) * | 1996-10-28 | 1998-05-22 | Sony Corp | Power unit |
| JP2011091991A (en) * | 2009-08-17 | 2011-05-06 | Schleifring & Apparatebau Gmbh | Controlled contactless power transmission capable of estimating load state |
| JP2011135760A (en) * | 2009-11-30 | 2011-07-07 | Tdk Corp | Wireless power supply device, wireless power receiver, and wireless power transmission system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160063004A (en) * | 2014-11-26 | 2016-06-03 | 에스엘 주식회사 | Apparatus for wireless power transmission |
| KR102204344B1 (en) * | 2020-06-29 | 2021-01-18 | 김선호 | Multi concentric plug with wireless charging function for mobile devices |
Also Published As
| Publication number | Publication date |
|---|---|
| KR102019079B1 (en) | 2019-09-06 |
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