CN104079047B - Wireless charger - Google Patents
Wireless charger Download PDFInfo
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- CN104079047B CN104079047B CN201310102136.9A CN201310102136A CN104079047B CN 104079047 B CN104079047 B CN 104079047B CN 201310102136 A CN201310102136 A CN 201310102136A CN 104079047 B CN104079047 B CN 104079047B
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Abstract
The present invention proposes a kind of wireless charger, and it connects power supply and charging equipment, comprising: transmitter module and receiver module；Transmitter module includes: control unit, power drive unit, the first resonant element, switch element and feedback unit, feedback unit detection wireless charger whether is connected to charging equipment or whether charging completes, if wireless charger is connected to charging equipment or charging complete, transmitter module starts to charge up, otherwise, transmitter module stops charging；Receiver module includes: the second resonant element, rectification filtering unit, pressure unit and output unit, and the second resonant element produces alternating voltage, and rectification filtering unit is converted into DC source alternating voltage, and to DC voltage filtering；Pressure unit is charging voltage DC voltage blood pressure lowering；Output unit exports to charging equipment.The present invention can be being connected to charging equipment when, automatic charging, can be in low standby power loss by wireless charger again, it is to avoid the waste of the energy.
Description
Technical field
The present invention relates to a kind of charger, particularly relate to a kind of wireless charger.
Background technology
Wireless charging technology is increasingly widely used, but the wireless charger on market does not has automatic detection function, and wireless charger cannot judge whether wireless charger is connected to charging equipment or charging equipment is the most fully charged.If being connected to charging equipment, wireless charger can not automatic charging, need to restart, operate cumbersome, and the regular hour to be waited.If filled with electricity, wireless charger continues to produce electric energy, will increase stand-by power consumption, cause unnecessary waste.
Summary of the invention
The technical problem to be solved in the present invention is the deficiency overcoming above-mentioned prior art to exist, and a kind of wireless charger is proposed, it is possible to solve wireless charger and cannot detect whether to be connected to charging equipment or charging equipment is the most fully charged and cause unnecessary energy waste and cannot the problem of automatic charging.
For solving above-mentioned technical problem, the present invention proposes a kind of wireless charger, and it connects power supply and charging equipment, comprising: transmitter module, comprising: control unit, it connects power supply；Power drive unit, it connects control unit, and it is controlled by control unit；First resonant element, it connects power drive unit, and it is for producing the magnetic field of change under the driving of power drive unit；Switch element, its connection control unit, power drive unit and the first resonant element, it is controlled by control unit, is used for controlling power supply and is switched on or off with power drive unit, the first resonant element；Feedback unit, it connects the first resonant element and switch element, it is used for detecting wireless charger and whether is connected to charging equipment or whether charging completes, if wireless charger is connected to charging equipment or charging complete, output loading feedback signal, control unit controls switch element and closes, power supply and power drive unit, first resonant element conducting, first resonant element produces changes of magnetic field, transmitter module starts to charge up, otherwise, output no-load signal, control unit controls switch element and opens, power supply and power drive unit, first resonant element disconnects, transmitter module stops charging；Receiver module, comprising: the second resonant element, it produces alternating voltage for the changes of magnetic field of sensing the first resonant element；Rectification filtering unit, it connects the second resonant element, for alternating voltage is converted into DC source, and to DC voltage filtering；Pressure unit, it connects rectification filtering unit, for being charging voltage DC voltage blood pressure lowering；Output unit, it connects pressure unit, for charging voltage is exported to charging equipment.Feedback unit includes the first comparator, second comparator, first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, first audion and the first electric capacity, first resistance, second resistance and the 3rd resistance are sequentially connected in series between power supply and ground, 5th resistance is connected between the forward end of the first comparator and the junction of the first resistance and the second resistance, the backward end of the first comparator connects the second resistance and the junction of the 3rd resistance, the outfan of the first comparator connects the backward end of the second comparator, the forward end of the second comparator connects the first resistance and the junction of the second resistance, the outfan of the second comparator connects the base stage of the first audion after connecting the 4th resistance, it is connected between the colelctor electrode of the first audion and emitter stage and has the first electric capacity, the grounded emitter of the first audion.
Preferably, transmitter module also includes indicating member, indicating member is connected between feedback unit and the first resonant element, indicating member includes the 6th resistance, the 7th resistance, the first diode, the second diode, the outfan of the first comparator connects the first resonant element after being sequentially connected with the 6th resistance and the first diode, and the outfan of the second comparator connects the first resonant element after being sequentially connected with the 7th resistance and the second diode.
Preferably, switch element includes that switch chip, switch chip include input and outfan, and the input of switch chip connects control unit, and the outfan of switch chip connects power drive unit and the first resonant element.
Preferably, control unit includes that single-chip microcomputer, single-chip microcomputer include first input end, the first outfan and the second outfan, and first input end connects power supply, the first outfan connecting valve unit, and the second outfan connects power drive unit.
Preferably, transmitter module also includes activate switch, and activate switch connects single-chip microcomputer, when activate switch is closed, and single-chip microcomputer is started working.
Preferably, the pressure unit of receiver module includes that transformer, transformer include input and outfan, and the input of transformer connects the rectification filtering unit of receiver module, and the outfan of transformer connects the output unit of receiver module.
Preferably, transmitter module also includes voltage regulation unit, and voltage regulation unit includes input and outfan, and the input of voltage regulation unit connects power supply and control unit, and the outfan of voltage regulation unit connects power drive unit and the first resonant element.
Compared with prior art, the wireless charger of the present invention, by arranging feedback unit, it is possible to whether detection wireless charger is connected to charging equipment or charging equipment is the most fully charged automatically, this makes it possible to being connected to charging equipment when, automatic charging, need not operate, use fairly simple, fully charged after, low standby power loss can be in by wireless charger again, it is to avoid the waste of the energy.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the wireless charger of the present invention.
Description of reference numerals is as follows: transmitter module 1 control unit 11 single-chip microcomputer U1 crystal oscillator X1 the second electric capacity C2 the 3rd electric capacity C3 switch element 12 switch chip U2 feedback unit 13 first comparator B1 the second comparator B2 the first resistance R1 the second resistance R2 the 3rd resistance R3 the 4th resistance R4 the 5th resistance R5 the first audion Q1 the first electric capacity C1 indicating member 14 the 6th resistance R6 the 7th resistance R7 the first diode D1 the second diode D2 power drive unit 15 first resonant element 16 first inductance L1 activate switch S1 voltage regulation unit 17 three terminal integrated voltage stabilizer U3 receiver module 2 second resonant element 21 second resonance coil L2 rectification filtering unit 22 pressure unit 23 transformer U4 output unit 24.
Detailed description of the invention
In order to further illustrate principle and the structure of the present invention, in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail.
Refer to Fig. 1, refer to Fig. 1, the wireless charger of the present invention, it connects power supply and charging equipment, comprising: transmitter module 1 and receiver module 2.
Transmitter module 1 includes: control unit 11, switch element 12, feedback unit 13, indicating member 14, power drive unit the 15, first resonant element 16, activate switch S1 and voltage regulation unit 17.Receiver module 2 includes: the second resonant element 21, rectification filtering unit 22, pressure unit 23 and output unit 24.Control unit 11 connects power supply and activate switch S1, power drive unit 15 connects control unit 11, first resonant element 16 connects power drive unit 15, switch element 12 connects control unit 11, power drive unit 15 and the first resonant element 16, feedback unit 13 connects the first resonant element 16 and switch element 12, and indicating member 14 is connected between feedback unit 13 and the first resonant element 16.Rectification filtering unit 22 connects the second resonant element 21, and pressure unit 23 connects rectification filtering unit 22, and output unit 24 connects pressure unit 23.
Activate switch S1 is closed, and control unit 11 is started working.Power drive unit 15 is controlled by control unit 11, and the first resonant element 16 produces the magnetic field of change under the driving of power drive unit 15.Switch element 12 is controlled by control unit 11, is used for controlling power supply and is switched on or off with power drive unit the 15, first resonant element 16.Feedback unit 13 is used for detecting wireless charger and whether is connected to charging equipment or whether charging completes, if wireless charger is connected to charging equipment or charging equipment completes, output loading feedback signal, control unit 11 controls switch element 12 and closes, power supply and power drive unit 15, first resonant element 16 turns on, first resonant element 16 produces changes of magnetic field, transmitter module 1 starts to charge up, otherwise, output no-load signal, control unit 11 controls switch element 12 and opens, power supply and power drive unit 15, first resonant element 16 disconnects, transmitter module 1 stops charging.
Its changes of magnetic field being used for sensing the first resonant element 16 of second resonant element 21, produces alternating voltage.Rectification filtering unit 22 is used for being converted into alternating voltage DC source, and to DC voltage filtering；Pressure unit 23 is used for DC voltage blood pressure lowering being charging voltage；Output unit 24 is for exporting charging voltage to charging equipment.
Activate switch S1 connects single-chip microcomputer U1, when activate switch S1 is closed, and single-chip microcomputer U1 starts working.
Control unit 11 includes single-chip microcomputer U1, crystal oscillator X1, the second electric capacity C2 and the 3rd electric capacity C3.Single-chip microcomputer U1 includes first input end, the second input, the 3rd input, the first outfan and the second outfan.The first input end of single-chip microcomputer U1 connects power supply, second input of single-chip microcomputer U1 connects ground connection after the second electric capacity C2,3rd input of single-chip microcomputer U1 connects ground connection after the 3rd electric capacity C3, the first outfan connecting valve unit 12 of single-chip microcomputer U1, second outfan of single-chip microcomputer U1 connects power drive unit 15.Crystal oscillator X1 is connected between second input of single-chip microcomputer U1 and the 3rd input.In the present embodiment, single-chip microcomputer U1 can control switch element 12, power control unit 11 and feedback unit 13 and work by coding.Single-chip microcomputer U1 is encapsulated as DIP4.In the present embodiment, first pin of single-chip microcomputer U1 connects activate switch S1, the second pin connecting valve unit 12 of single-chip microcomputer U1, the three-prong of single-chip microcomputer U1 and the 6th pin connect power supply, the 4th pin ground connection of single-chip microcomputer U1,5th pin of single-chip microcomputer U1 connects power switch unit 12, and the 7th pin of single-chip microcomputer U1 connects the 8th pin of the 3rd electric capacity C3, single-chip microcomputer U1 and connects the second electric capacity C2.
Switch element 12 includes switch chip U2.Switch chip U2 includes input and outfan.The input of switch chip U2 connects control unit 11, and the outfan of switch chip U2 connects power drive unit 15 and the first resonant element 16.In the present embodiment, switch chip U2 be model be CEM4936 chip.Therefore, the pin 1 of input correspondence CEM4936 chip, pin 2, pin 3 and the pin 4 of switch chip U2, outfan correspondence pin 5, pin 6, pin 7 and the pin 8 of switch chip U2.
Feedback unit 13 includes the first comparator B1, the second comparator B2, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the first audion Q1 and the first electric capacity C1.First resistance R1, the second resistance R2 and the 3rd resistance R3 are sequentially connected in series between power supply and ground, and the 5th resistance R5 is connected between the forward end of the first comparator B1 and the junction of the first resistance R1 and the second resistance R2.The backward end of the first comparator B1 connects the second resistance R2 and the junction of the 3rd resistance R3, and the outfan of the first comparator B1 connects the backward end of the second comparator B2.The forward end of the second comparator B2 connects the first resistance R1 and the junction of the second resistance R2, the outfan of the second comparator B2 connects the base stage of the first audion Q1 after connecting the 4th resistance R4, it is connected between colelctor electrode and the emitter stage of the first audion Q1 and has the first electric capacity C1, the grounded emitter of the first audion Q1.In the present embodiment, the model of the first comparator B1 and the second comparator B2 is LM358.
Indicating member 14 includes the 6th resistance R6, the 7th resistance R7, the first diode D1 and the second diode D2.The outfan of the first comparator B1 connects the first resonant element 16 after being sequentially connected with the 6th resistance R6 and the first diode D1, the outfan of the second comparator B2 connects the first resonant element 16 after being sequentially connected with the 7th resistance R7 and the second diode D2.In the present embodiment, the first diode D1 is red LED lamp, and the second diode D2 is green LED lamp.
First resonant element 16 includes the first inductance L1.In the present embodiment, the inductance value of the first inductance L1 is 100 μ H.
Voltage regulation unit 17 includes input and outfan.The input of voltage regulation unit 17 connects power supply and control unit 11, and the outfan of voltage regulation unit 17 connects power drive unit 15 and the first resonant element 16.In the present embodiment, voltage regulation unit 17 includes the three terminal integrated voltage stabilizer U3 of model 78L05.The input of three terminal regulator connects the input of voltage regulation unit 17, and the outfan of three terminal regulator connects the outfan of voltage regulation unit 17.
Second resonant element 21 of receiver module 2 includes the second resonance coil L2.
The pressure unit 23 of receiver module 2 includes transformer U4.Transformer U4 includes input and outfan, and the input of transformer U4 connects the rectification filtering unit 22 of receiver module 2, and the outfan of transformer U4 connects the output unit 24 of receiver module 2.In the present embodiment, the model of transformer U4 is TA1410, for the voltage received is reduced to the voltage needed for actual charging.Pin 2 and the pin 7 of transformer U4TA1410 are input, and the pin 1 of transformer U4TA1410, pin 3, pin 4 and pin 5 are outfan.
The operation principle of the present invention is described in detail below in conjunction with Fig. 1.
Press activate switch S1, circuit start, the single-chip microcomputer U1 starting of oscillation of control unit 11, the pin 5 of single-chip microcomputer U1 export square-wave signal to rear class amplify after, to power drive unit 15, power drive unit 15 drives the first resonance coil resonance, thus produces the magnetic field of a change.
The pin 2 of single-chip microcomputer U1 exports high level and controls switch element 12 conducting offer power supply.First comparator B1 and the second comparator B2 plays feedback effect, when wireless charger has load, the end in the same direction of the first comparator B1 is high level, output also will be high level, therefore, the backward end of the second comparator B2 is also high level, the second comparator B2 output low level, such first diode D1 shiny red；When after charging complete, electric current declines, the end in the same direction of the first comparator B1 is low level, output low level, therefore, the backward end of the second comparator B2 is low level, and holding in the same direction of the second comparator B2 is higher than the level of backward end, and the second comparator B2 exports high level, now the second diode D2 bright green, 3 feet of single-chip microcomputer U1 transfer low level to, and internal delay time starts, if non-loaded or charging complete in 30 seconds, the 2 foot output low levels of single-chip microcomputer U1, switch element 12 pipe ends, and disconnects the connection with power drive unit 15, standby minimizing power consumption.
When the second resonance coil L2 senses the change in magnetic field, second resonance coil L2 just produces alternating voltage, then by rectification filtering unit 22 rectification, filtering is to transformer U4, voltage is reduced to the charging voltage value that we are required, finally by output unit 24 output voltage to charging equipment.
It should be noted that the model not restriction of single-chip microcomputer, as long as being capable of the above-mentioned control to switch element, power control unit and feedback unit.
Compared with prior art, the wireless charger of the present invention, by arranging feedback unit, it is possible to whether detection wireless charger is connected to charging equipment or charging equipment is the most fully charged automatically, this makes it possible to being connected to charging equipment when, automatic charging, need not operate, use fairly simple, fully charged after, low standby power loss can be in by wireless charger again, it is to avoid the waste of the energy.
The foregoing is only the preferable possible embodiments of the present invention, not limit the scope of the invention.Equivalent structure change done by all utilization description of the invention and accompanying drawing content, is all contained in protection scope of the present invention.
Claims (7)
1. a wireless charger, its connection power supply and charging equipment, including:
Transmitter module, comprising: control unit, it connects described power supply；Power drive unit, it connects described control unit, and it is controlled by described control unit；First resonant element, it connects described power drive unit, and it is for producing the magnetic field of change under the driving of described power drive unit；Switch element, its described control unit of connection, power drive unit and the first resonant element, it is controlled by described control unit, is used for controlling described power supply and is switched on or off with described power drive unit, the first resonant element；Feedback unit, it connects described first resonant element and switch element, it is used for detecting described wireless charger and whether is connected to described charging equipment or whether charging completes, if wireless charger is connected to charging equipment or charging equipment completes, output loading feedback signal, described control unit controls described switch element and closes, described power supply and described power drive unit, first resonant element conducting, described first resonant element produces changes of magnetic field, described transmitter module starts to charge up, otherwise, output no-load signal, described control unit controls described switch element and opens, described power supply and described power drive unit, first resonant element disconnects, described transmitter module stops charging,
Receiver module, comprising: the second resonant element, it, for sensing the changes of magnetic field of described first resonant element, produces alternating voltage；Rectification filtering unit, it connects described second resonant element, for described alternating voltage is converted into DC source, and to described DC voltage filtering；Pressure unit, it connects described rectification filtering unit, for being charging voltage described DC voltage blood pressure lowering；Output unit, it connects described pressure unit, for described charging voltage is exported to described charging equipment,
It is characterized in that, including:
nullDescribed feedback unit includes the first comparator、Second comparator、First resistance、Second resistance、3rd resistance、4th resistance、5th resistance、First audion and the first electric capacity，Described first resistance、Second resistance and the 3rd resistance are sequentially connected in series between described power supply and ground，Described 5th resistance is connected between forward end and described first resistance and the junction of the second resistance of described first comparator，The backward end of described first comparator connects described second resistance and the junction of the 3rd resistance，The outfan of described first comparator connects the backward end of described second comparator，The forward end of described second comparator connects described first resistance and the junction of the second resistance，The outfan of described second comparator connects the base stage of described first audion after connecting described 4th resistance，It is connected between colelctor electrode and the emitter stage of described first audion and has described first electric capacity，The grounded emitter of described first audion.
2. wireless charger as claimed in claim 1, it is characterized in that, described transmitter module also includes indicating member, described indicating member is connected between described feedback unit and the first resonant element, described indicating member includes the 6th resistance, the 7th resistance, the first diode, the second diode, the outfan of described first comparator connects described first resonant element after being sequentially connected with described 6th resistance and the first diode, the outfan of described second comparator connects described first resonant element after being sequentially connected with described 7th resistance and the second diode.
3. wireless charger as claimed in claim 1, it is characterized in that, described switch element includes switch chip, described switch chip includes input and outfan, the input of described switch chip connects described control unit, and the outfan of described switch chip connects described power drive unit and the first resonant element.
4. wireless charger as claimed in claim 1, it is characterized in that, described control unit includes single-chip microcomputer, described single-chip microcomputer includes first input end, the first outfan and the second outfan, described first input end connects described power supply, described first outfan connects described switch element, and described second outfan connects described power drive unit.
5. wireless charger as claimed in claim 4, it is characterised in that described transmitter module also includes activate switch, and described activate switch connects described single-chip microcomputer, when described activate switch is closed, and described single-chip microcomputer is started working.
6. wireless charger as claimed in claim 1, it is characterized in that, the pressure unit of described receiver module includes transformer, described transformer includes input and outfan, the input of described transformer connects the rectification filtering unit of described receiver module, and the outfan of described transformer connects the output unit of described receiver module.
7. wireless charger as claimed in claim 1, it is characterized in that, described transmitter module also includes voltage regulation unit, described voltage regulation unit includes input and outfan, the input of described voltage regulation unit connects described power supply and control unit, and the outfan of described voltage regulation unit connects described power drive unit and the first resonant element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310102136.9A CN104079047B (en) | 2013-03-27 | 2013-03-27 | Wireless charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310102136.9A CN104079047B (en) | 2013-03-27 | 2013-03-27 | Wireless charger |
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| Publication Number | Publication Date |
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| CN104079047A CN104079047A (en) | 2014-10-01 |
| CN104079047B true CN104079047B (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310102136.9A Expired - Fee Related CN104079047B (en) | 2013-03-27 | 2013-03-27 | Wireless charger |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016050156A1 (en) * | 2014-10-02 | 2016-04-07 | 陈念祖 | Wireless charging system and device |
| CN104475906B (en) * | 2014-10-30 | 2016-09-14 | 东莞莱玛电子科技有限公司 | A kind of charging type electric soldering iron device |
| CN106329682B (en) * | 2015-07-07 | 2020-09-04 | 海洋王（东莞）照明科技有限公司 | Wireless charging system |
| CN107734789B (en) * | 2017-11-24 | 2023-09-22 | 山西高科华杰光电科技有限公司 | OLED intelligent desk lamp with wireless charging function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101447684A (en) * | 2007-11-30 | 2009-06-03 | 郑春吉 | Wirelss charging system |
| CN102130514A (en) * | 2011-03-30 | 2011-07-20 | 上海北京大学微电子研究院 | Wireless power supply device of diagnosis and treatment system |
| CN102142709A (en) * | 2011-03-23 | 2011-08-03 | 深圳市银盾科技开发有限公司 | Wireless charging device |
| CN102157989A (en) * | 2011-03-28 | 2011-08-17 | 东南大学 | Closed loop wireless energy supply system for implantable medical electronic device |
| CN202034798U (en) * | 2011-02-24 | 2011-11-09 | 富达通科技股份有限公司 | Portable wireless charging device |
-
2013
- 2013-03-27 CN CN201310102136.9A patent/CN104079047B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101447684A (en) * | 2007-11-30 | 2009-06-03 | 郑春吉 | Wirelss charging system |
| CN202034798U (en) * | 2011-02-24 | 2011-11-09 | 富达通科技股份有限公司 | Portable wireless charging device |
| CN102142709A (en) * | 2011-03-23 | 2011-08-03 | 深圳市银盾科技开发有限公司 | Wireless charging device |
| CN102157989A (en) * | 2011-03-28 | 2011-08-17 | 东南大学 | Closed loop wireless energy supply system for implantable medical electronic device |
| CN102130514A (en) * | 2011-03-30 | 2011-07-20 | 上海北京大学微电子研究院 | Wireless power supply device of diagnosis and treatment system |
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