KR101730236B1 - Wireless Power Transmitter - Google Patents
Wireless Power Transmitter Download PDFInfo
- Publication number
- KR101730236B1 KR101730236B1 KR1020150056021A KR20150056021A KR101730236B1 KR 101730236 B1 KR101730236 B1 KR 101730236B1 KR 1020150056021 A KR1020150056021 A KR 1020150056021A KR 20150056021 A KR20150056021 A KR 20150056021A KR 101730236 B1 KR101730236 B1 KR 101730236B1
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- Prior art keywords
- voltage
- adjustment
- power
- wireless power
- adapter
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- 230000005540 biological transmission Effects 0.000 claims abstract description 45
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 238000010248 power generation Methods 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 101100112673 Rattus norvegicus Ccnd2 gene Proteins 0.000 description 3
- 230000005669 field effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- H02J17/00—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
According to an embodiment of the present invention, a wireless power transmission apparatus is disclosed. A wireless power transmission apparatus according to an embodiment of the present invention includes an adjustment signal generation unit for generating an adjustment signal in response to a first voltage input from an adapter and outputting the adjustment signal to the adapter, 2 voltage to transmit power wirelessly.
Description
The present application relates to a wireless power transmission apparatus.
Wireless power transfer technology has been widely applied to a variety of communication devices including a smart phone and a charger of various home appliances, and it can be applied to electric vehicles in the future. .
The transmitting apparatus for transmitting the wireless power generates the wireless power by inputting the external power. In a certain case, for example, when it is necessary to perform rapid charging, the size of the external power needs to be changed.
Such a conventional technique can be understood with reference to Korean Patent Laid-Open Publication No. 2012-0109067 or Japanese Laid-Open Patent Publication No. 2014-003877.
An aspect of the present invention is to provide a wireless power transmission apparatus capable of externally providing information on a required external power source.
One technical aspect of the present invention proposes an embodiment of a wireless power transmission apparatus. Wherein the wireless power transmission apparatus is a wireless power transmission apparatus that receives one of a first direct voltage from an adapter and a second direct voltage having a voltage level higher than the first direct voltage and wirelessly transmits power, An adjustment signal generation unit for generating an adjustment signal by reducing the first DC voltage and outputting the adjustment signal to the adapter, and a second DC voltage output by the adapter in response to the adjustment signal, And a wireless power generation unit for transmitting power.
Another technical aspect of the present invention proposes an embodiment of a wireless power transmission apparatus. Wherein the wireless power transmission apparatus is a wireless power transmission apparatus that receives either one of a general charging power supply and a quick charging power supply as an external power supply from an adapter and transmits power wirelessly, And an output terminal for outputting an adjustment signal to the adapter when the external power is supplied to the adapter, and an output terminal for outputting an adjustment signal to the adapter, Generating unit.
The solution of the above-mentioned problems does not list all the features of the present invention. Various means for solving the problems of the present invention can be understood in detail with reference to specific embodiments of the following detailed description.
The wireless power transmission apparatus according to an embodiment of the present invention can provide an effect of externally providing information on the required external power source size. In addition, a wireless power transmission apparatus according to an embodiment of the present invention can wirelessly transmit electric power to be more suitable for a situation using an external power source having various sizes.
1 is a diagram illustrating a wireless power transmission apparatus according to an embodiment of the present invention.
2 shows a block diagram of a wireless power transmission apparatus according to an embodiment of the present invention.
3 to 20 are diagrams illustrating various embodiments of the adjustment signal generator of the wireless power transmission apparatus according to the embodiment of the present invention shown in FIG.
21 and 22 are diagrams illustrating various embodiments of the delay circuit of the adjustment signal generator of the wireless power transmission apparatus according to an embodiment of the present invention shown in Figs. 18 to 20, respectively.
23 is a block diagram of a wireless power transmission apparatus according to an embodiment of the present invention.
24 shows a block diagram of a wireless power transmission apparatus according to an embodiment of the present invention.
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.
1 is a diagram illustrating a wireless power transmission apparatus according to an embodiment of the present invention.
In the example shown in FIG. 1, the wireless
The wireless
The
In one embodiment, the
Here, the first DC power supply may be a general charging power supply, and the second DC power supply may be a power supply for rapid charging. That is, since the second DC power supply has a higher voltage level than the first DC power supply, it can be used for rapid charging. For example, the
The
In one embodiment, the
The wireless
Hereinafter, various embodiments of the wireless
2 shows a block diagram of a wireless power transmission apparatus according to an embodiment of the present invention.
2, the wireless
The wireless
Converter 10 can convert the external power source Vext into a driving power source for driving the inverter. The external power source Vext may be a DC power source, and the driving power source may be a DC power source.
In one embodiment, the
Converter 10 can output a desired voltage through the on-off operation of the switch element, including a switch element-for example, a field effect transistor (FET) -and a magnetic element.
According to the embodiment, the
The
For example, as the
The
In one embodiment, the
The AC power may be applied to the
The
The adjustment signal may include a first adjustment voltage signal (V1) and a second adjustment voltage signal (V2).
In one embodiment, the external power source may include a first direct current power source and a second direct current power source having a voltage level greater than the first direct current power source. The adjustment
In one embodiment, the adjustment signals (V1, V2) may be a voltage signal having a voltage level that is less than the voltage level of the first DC power supply. Therefore, the adjustment
In one embodiment, the first adjustment voltage signal V1 and the second adjustment voltage signal V2 may have different sizes from each other. For example, the first regulated voltage signal V1 may be a voltage of 3.3 V and the second regulated voltage signal V2 may be a voltage of 0.6V.
In one embodiment, the first adjustment voltage signal V1 and the second adjustment voltage signal V2 may be output with a time difference. In this embodiment, the
In one embodiment, the
Various embodiments of the
3 to 20 are diagrams illustrating various embodiments of the adjustment signal generator of the wireless power transmission apparatus according to the embodiment of the present invention shown in FIG.
As shown in FIG. 3, one embodiment of the
As shown in FIG. 4, one embodiment of the
Hereinafter, a pair of resistance elements R1 and R2 connected in series as the voltage divider circuit is used, but it is an exemplary one, and it is apparent that various modifications are possible.
As shown in FIG. 5, an embodiment of the
As shown in FIG. 6, one embodiment of the
7, an embodiment of the
As shown in FIG. 8, an embodiment of the
A step-down converter such as a buck converter or the like may be used as the DC / DC converter of the embodiment of the
As shown in FIG. 9, one embodiment of the
10, an embodiment of the
As shown in FIG. 11, one embodiment of the
The linear regulator of the embodiment of the
As shown in FIG. 12, one embodiment of the
More specifically, the
The
13, an embodiment of the
More specifically, the
The
As shown in FIG. 14, an embodiment of the
More specifically, the
The adjustment
15 to 17, an embodiment of the
As shown in Fig. 15, both the first adjustment voltage signal V1 and the second adjustment voltage signal V2 may be output through the buffer, and as shown in Figs. 16 and 17, the second adjustment voltage signal V2, May be output through this buffer.
Although FIG. 15 shows a configuration in which a buffer is added to an embodiment of the
In addition, FIG. 16 shows a configuration in which a buffer is added to one embodiment of the
Although FIGS. 16 and 17 show the case where the second adjusted voltage signal V2 is output through the buffer, the first adjusted voltage signal V1 may be output through the buffer.
The buffer shown in Figs. 15 to 17 may be constituted by a voltage follower using an element such as an operational amplifier (OP Amp).
18 to 20, an embodiment of the
As shown in Fig. 18, the first adjusted voltage signal V1 may be output through the
The second adjusted voltage signal V2 may be output through the delay circuit as shown in Fig.
Both the first adjustment voltage signal V1 and the second adjustment voltage signal V2 may be output through the delay circuit as shown in Fig.
18 shows a configuration in which the delay circuit is added to the embodiment using the
19 shows a configuration in which a delay circuit is added to an embodiment of the
20 shows a configuration in which the delay circuit is added to the embodiment using the
21 and 22 are diagrams illustrating various embodiments of the delay circuit of the
The delay circuit shown in FIGS. 21 and 22 can delay the voltage input through the VDD terminal for a predetermined time delay, and then output the delayed voltage to the OUT terminal.
More specifically, when a voltage higher than the reference voltage Vref is input through the VDD terminal, an oscillator counter timer is activated. The oscillator counter timer counts the number of signals generated by the oscillator and turns on or off the switch (for example, FET, etc.) when the set number is counted do.
The delay circuit shown in Fig. 21 relates to an embodiment in which a resistor is externally provided. For example, the delay circuit shown in FIG. 21 relates to an embodiment in which an external resistor is provided between the outside of the VDD terminal and the outside of the OUT terminal. When a VDD voltage is input, a switch (FET) Turn on to output 0V to the OUT terminal, turn off the switch (FET) after a certain time delay, and output the VDD voltage to the OUT terminal through the external resistor.
The delay circuit shown in Fig. 22 relates to an embodiment in which a separate resistor is not required outside. When the VDD voltage is input, the delay circuit turns on the lower switch connected to the OUT terminal and outputs 0V to the OUT terminal. After a certain time delay, the upper switch is turned on to output the VDD voltage to the OUT terminal.
Although not shown, the
FIG. 23 is a block diagram of a wireless power transmission apparatus according to an embodiment of the present invention. The wireless power transmission apparatus includes a
The functions and operations of the
The
For example, the
In one embodiment, the
The
When the magnitude of the external power Vext is large, for example, when the power adapter provides the second DC power having a voltage level higher than that of the first DC power, the
Therefore, when the size of the external power Vext is small, the
FIG. 24 is a block diagram of a wireless power transmission apparatus according to an embodiment of the present invention. The wireless power transmission apparatus includes a
As described above, the input voltage Vext input to the wireless power transmission apparatus can be variably input. For example, the wireless power transmission apparatus can receive 5V or 9V as the input voltage (Vext).
When the input voltage is varied from 5V to 9V, the voltage applied to the
Therefore, according to an embodiment of the present invention, the voltage
Hereinafter, the operation of the voltage
When the magnitude of the input voltage Vext is 5V, the input voltage Vext of 5V is divided by the resistor R1 and the resistor R3 and input to the positive terminal of the comparator CP1. At this time, the voltage divided by the resistor R1 and the resistor R3 may be smaller than the voltage V1. That is, the resistance values of the resistor R1 and the resistor R3 can be determined so that the voltage divided by the resistor R1 and the resistor R3 is smaller than the voltage V1.
By comparing the voltage divided by the voltage V1 and the resistor R1 and the resistor R3, the output of the comparator CP1 can be output as LOW. The LOW output of the comparator CP1 may turn off the switch so that the first input voltage Vin1 may be input to the
[Equation 1]
Vin1 = 5 * R4 / (R2 + R4)
On the other hand, when the magnitude of the input voltage Vext is 9V, the input voltage Vext of 9V is divided by the resistor R1 and the resistor R3 and can be input to the positive terminal of the comparator CP1, Lt; RTI ID = 0.0 > V1. ≪ / RTI > Likewise, the resistance values of the resistors R1 and R3 can be determined so that the voltage divided by the resistors R1 and R3 is greater than the voltage V1.
By comparing the voltage divided by the voltage V1 and the resistor R1 and the resistor R3, the output of the comparator CP1 can be output HIGH. The HIGH output of the comparator CP1 may turn on the switch so that the second input voltage Vin2 may be input to the
&Quot; (2) "
Vin2 = 9 * (R4 // R5) / (R2 + R4 // R5)
Accordingly, the resistors R2 to R5 may have their resistance values such that the first input voltage Vin1 determined by Equation (1) is equal to the second input voltage Vin2 determined by Equation (2).
Therefore, even if the input voltage Vext varies to 5V or 9V as described above, since the constant voltage is always input to the
The functions and operations of the
The
The voltage
According to an embodiment of the present invention, the external power source Vext input to the wireless power transmission apparatus may be variable in size. Therefore, according to an embodiment of the present invention, even if the magnitude of the external power source Vext varies, a sensing signal is generated using a first adjustment signal outputting a voltage of a predetermined magnitude, May determine whether the external power source Vext is input.
Accordingly, even if the size of the external power Vext varies, the controller 22 can determine whether the external power Vext is normally input.
Although not shown, the wireless power transmission apparatus according to an embodiment of the present invention shown in FIG. 24 may additionally include the adjustment signal generator shown in FIG. 3 to FIG.
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 obvious to those of ordinary skill in the art.
10: Converter
20: Inverter
30:
40: Coil
50: Adjustment signal generator
100: Wireless power transmitting device
110: wireless power generation unit
200: Wireless power receiving device
300: Electronic device
400: Power adapter
Claims (21)
An adjustment signal generator for generating an adjustment signal by reducing the first DC voltage input from the adapter and outputting the adjustment signal to the adapter; And
A wireless power generation unit that wirelessly transmits power using the second DC voltage output by the adapter in response to the adjustment signal;
And a wireless power transmitter.
A first adjustment voltage signal; And
And a second regulated voltage signal having a voltage level less than the first regulated voltage signal.
And generates the second adjusted voltage signal by reducing the first adjusted voltage signal.
A power supply terminal and a ground terminal connected to the adapter for receiving the first DC voltage or the second DC voltage;
A first signal terminal for outputting the first adjustment voltage signal; And
And a second signal terminal for outputting the second adjustment voltage signal.
An inverter for generating an AC voltage using the second DC voltage;
A coil receiving the AC voltage and transmitting power wirelessly; And
And a control unit for controlling operation of the inverter.
And the inverter is operated when the reference time elapses after the adjustment signal generator outputs the adjustment signal.
An adjustment signal generator for reducing the external power supply and outputting an adjustment signal to the adapter if the external power supplied from the adapter is the general charging power; And
And a wireless power generation unit that wirelessly transmits power using the rapid charging power provided by the adapter after the adjustment signal is output.
A converter including at least one switching element and converting the external power to a driving power through an on-off operation of the switching element;
An inverter for converting the driving power into an AC power;
A coil receiving the AC power; And
Controls the operation of the converter and the inverter so that the switch element controls the switch element to perform an on-off operation with the first duty ratio if the external power source is the general charging power source, And a control unit for controlling the switch element so that the switch element performs an on-off operation with a second duty ratio smaller than the first duty ratio if the power source is a quick-charge power source.
Wherein the adjustment signal generator outputs the adjustment signal and wirelessly transmits power when a reference time elapses.
The first regulated voltage signal and
And a second regulated voltage signal having a voltage level less than the first regulated voltage signal.
A first converting unit for reducing the normal charging power source to convert the normal charging power source into the first adjusting voltage signal; And
A second conversion unit for converting the general charging power source to a second adjusted voltage signal; And a wireless power transmitter.
A first converting unit for reducing the normal charging power source to convert the normal charging power source into the first adjusting voltage signal; And
A second conversion unit for converting the first adjustment voltage signal to a second adjustment voltage signal by converting the first adjustment voltage signal; And a wireless power transmitter.
A converter for converting the first DC voltage or the second DC voltage into a driving power source;
An inverter for converting the driving power into an AC power; And
A controller for controlling operations of the converter and the inverter to wirelessly transmit power to the wireless power receiving device;
And a wireless power transmitter.
And variably controls the output of the inverter according to the magnitude of the DC voltage supplied from the adapter.
And increases the duty ratio of the switch included in the converter when the first DC voltage is input from the adapter.
And reduces the duty ratio of the switch included in the converter when the second DC voltage is input from the adapter.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/851,651 US10063065B2 (en) | 2015-01-13 | 2015-09-11 | Wireless power transmitter |
| EP15185420.5A EP3046223B1 (en) | 2015-01-13 | 2015-09-16 | Wireless power transmitter |
| CN201510647097.XA CN105790447B (en) | 2015-01-13 | 2015-10-08 | Wireless power transmitter |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20150005919 | 2015-01-13 | ||
| KR1020150005919 | 2015-01-13 |
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| Publication Number | Publication Date |
|---|---|
| KR20160087319A KR20160087319A (en) | 2016-07-21 |
| KR101730236B1 true KR101730236B1 (en) | 2017-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150056021A KR101730236B1 (en) | 2015-01-13 | 2015-04-21 | Wireless Power Transmitter |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102453478B1 (en) * | 2017-12-06 | 2022-10-12 | 주식회사 위츠 | Apparatus for transmiting power wirelessly |
| KR20190114185A (en) * | 2018-03-29 | 2019-10-10 | 엘지이노텍 주식회사 | Wireless charging device and wireless charging method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101181818B1 (en) * | 2011-06-10 | 2012-09-11 | 유노시스템 주식회사 | Wireless Charger System to improve EMC |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101267076B1 (en) | 2011-03-24 | 2013-05-24 | 주식회사 한림포스텍 | Method for controlling power in wireless power transmission assembly and wireless power assembly thereof |
| JP2014003877A (en) | 2012-05-24 | 2014-01-09 | Sony Corp | Power supply device, adaptor, power receiving device and power supply method |
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2015
- 2015-04-21 KR KR1020150056021A patent/KR101730236B1/en active IP Right Grant
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101181818B1 (en) * | 2011-06-10 | 2012-09-11 | 유노시스템 주식회사 | Wireless Charger System to improve EMC |
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| KR20160087319A (en) | 2016-07-21 |
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