CN204103575U - A kind of wireless charging device - Google Patents
A kind of wireless charging device Download PDFInfo
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- CN204103575U CN204103575U CN201420231352.3U CN201420231352U CN204103575U CN 204103575 U CN204103575 U CN 204103575U CN 201420231352 U CN201420231352 U CN 201420231352U CN 204103575 U CN204103575 U CN 204103575U
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Abstract
The utility model discloses a kind of wireless charging device, comprise feeder ear and charging end, described feeder ear comprises power circuit, connects the high-frequency oscillating circuits of power circuit, connect the high-frequency power amplifying circuit of high-frequency oscillating circuits, and connect the high-frequency emission coil of high-frequency power amplifying circuit; Described charging end comprises high-frequency reception coil, connects the rectifier filter circuit of high-frequency reception coil and connects the load unit of rectifier filter circuit; Described high-frequency oscillating circuits comprises the duty ratio adjustable pulse circuit that NE555 is formed.The utility model circuit is simple, economizes on resources, and output current is comparatively large, directly can promote the load of multiple automatic control; Timing precision is high simultaneously, temperature stability is good, and low price; Its efficient and rational property visible.
Description
Technical field
The utility model relates to a kind of charging device, particularly relates to a kind of wireless charging device.
Background technology
Electromagnetic induction phenomenon is disclosed from scientist in 1840, to maxwell's electromagnetic equation group of the classics that maxwell sets up, establish complete Theory of Electromagnetic Field by its mathematical theory, electromagnetic field not only can carry the transmission of signal for information, and electromagnetic field also carries energy simultaneously.Thus people imagine the wireless transmission by adopting the mode of electromagnetic field to realize energy with regard to starting.Wireless power transmission technology is broadly divided into three classes: 1. way of electromagnetic induction; 2. microwave or laser form; 3. electromagnetic resonance manifold type.In these three kinds of wireless charging modes, induction is technology the most ripe at present, its principle is the wireless transmission utilizing the electromagnetic induction principle between transmitting terminal coil and receiving terminal coil to realize electric energy, namely the power supply that transmitting terminal provides converts electrical energy into magnetic field energy, then by receiving terminal coil, magnetic energy is converted to electric energy, provides rechargeable energy to charging equipment.The ubiquitous problem of current electromagnetic induction wireless power transmission is that transmission range is limited, efficiency of transmission is lower, generally ripe not enough.
Utility model content
The purpose of this utility model is to provide a kind of charging device utilizing electromagnetic induction coupling principle to realize electric energy efficient wireless transmission.
The technical scheme that the utility model adopts for its technical problem of solution is:
A kind of wireless charging device, comprise feeder ear and charging end, described feeder ear comprises power circuit, connects the high-frequency oscillating circuits of power circuit, connect the high-frequency power amplifying circuit of high-frequency oscillating circuits, and connect the high-frequency emission coil of high-frequency power amplifying circuit; Described charging end comprises high-frequency reception coil, connects the rectifier filter circuit of high-frequency reception coil and connects the load unit of rectifier filter circuit; Described high-frequency oscillating circuits comprises the duty ratio adjustable pulse circuit that NE555 is formed.
As the further improvement of such scheme, described high-frequency oscillating circuits comprises the duty ratio adjustable pulse circuit that NE555 is formed.
As the further improvement of such scheme, described high-frequency power amplifying circuit comprises the field effect transistor as power amplifier element.
As the further improvement of such scheme, described high-frequency emission coil and high-frequency reception coil are solenoid coil.
The beneficial effects of the utility model are: wireless charging device provided by the utility model, its high-frequency oscillating circuits bag adopts NE555 formation duty ratio adjustable pulse oscillating circuit to replace active crystal oscillator formation high-frequency generator, frequency is adjustable in certain scope, and only need resistance and the electric capacity of minority, just the pulse signal of the various different frequencies needed for digit circuit can be produced, circuit is simple, economizes on resources; And output current is comparatively large, directly can promote the load of multiple automatic control; Timing precision is high simultaneously, temperature stability is good, and low price; Its efficient and rational property visible; In addition, the utility model can adopt field effect transistor as power amplifier element, power consumption is lower than switch triode, driving power is little, easy to use and drive circuit is fairly simple, be not easy distortion, in parallel use and to there will not be electric current to distribute uneven, solve the big current problem in practical application, there is higher noise margin and antijamming capability in addition.In addition, the utility model can adopt solenoid coil, and relatively evenly and have good directivity, it has long transmission distance and efficiency advantages of higher simultaneously in its magnetic field produced.
Accompanying drawing explanation
Fig. 1 is functional-block diagram of the present utility model;
Fig. 2 is workflow diagram of the present utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Below in conjunction with specific embodiment, specific implementation of the present utility model is described in detail:
With reference to Fig. 1, a kind of wireless charging device provided by the utility model, comprise feeder ear and charging end, described feeder ear comprises power circuit 1, connect the high-frequency oscillating circuits 2 of power circuit 1, connect the high-frequency power amplifying circuit 3 of high-frequency oscillating circuits 2 and the high-frequency emission coil 4 of high-frequency power amplifying circuit 3; Described charging end comprises high-frequency reception coil 5, connects the rectifier filter circuit 6 of high-frequency reception coil 5 and connects the load unit 7 of rectifier filter circuit 6; Powered by power circuit 1 during use, high-frequency emission coil 4 pairs of high-frequency reception coils 5 transmit, and can charge to load unit 7.Described high-frequency oscillating circuits 2 of the present utility model comprises the duty ratio adjustable pulse circuit 21 that NE555 is formed, and makes frequency adjustable in certain scope; And NE555 only needs resistance and the electric capacity of minority, just can produce the pulse signal of the various different frequencies needed for digit circuit, circuit is simple, economizes on resources, and output current is comparatively large, directly can promote the load of multiple automatic control; Timing precision is high simultaneously, temperature stability is good, and low price.
Wireless power transmission is, by coil, AC signal is delivered to receiving terminal from transmitting terminal, and frequency is higher, and the efficiency of transmission is higher.Therefore, need to produce required high-frequency signal by high-frequency oscillating circuits.
Use the duty ratio adjustable pulse oscillating circuit that NE555 is formed, frequency is adjustable in certain scope, and circuit is simple, economizes on resources.555 timers are a kind of multiduty monolithic medium scale integrated circuits.This circuit uses flexibly, convenient, only need external a small amount of Resistor-Capacitor Unit just can form monostable, multi resonant and Schmidt trigger.Thus be obtained in many fields such as generation and conversion, Measurement & Control, household electrical appliance and electronic toy of waveform and apply widely.The supply electric current of its output is large, directly can promote the load of multiple automatic control.
The type selecting of magnetic structure designs according to the transmission range of the transmission characteristic of system and load, and there is different designing requirements different application scenarios.Magnetic structure due to wireless electric energy transmission system belongs to Loosely Coupled Architecture, and launching and receiving end has very large air gap and both positions are energy relative movements, through to circuit analysis, determines to adopt solenoid coil.
In a preferred approach, described high-frequency power amplifying circuit 3 comprises field effect transistor 31 as power amplifier element to replace switch triode, and the effect of high-frequency power amplifying circuit 3 is that high-frequency signal is carried out power amplification, to meet the requirement of transmitted power.And high-frequency generator only plays a generation signal function, because wireless power transmission importantly wants transferring energy, so need high frequency power to amplify, high-frequency power amplifying circuit module is exactly be converted into the high-frequency signal with large energy, therefore, for meeting the requirement of design circuit, export by the vibration after high-frequency power amplifying circuit 3 amplifies the amplitude needing generation enough.Select this model of power field effect pipe IRF840, it is the brute force combination of collection quick, sturdy and durable, the low conduction impedance of conversion and high benefit, its power consumption is lower than switch triode, driving power is little, easy to use and drive circuit is fairly simple, mutual conductance linear better, there is larger Linear Amplifer region, be therefore not easy distortion.And due to field effect transistor 31 namely between grid and source electrode, voltage is constant, electric conduction fails to be convened for lack of a quorum with pipe temperature rise and reduces, there is negative current temperature coefficient, so there is not the damaged tubular that second breakdown causes, thus parallel connection can use and there will not be electric current to distribute uneven problem, solving the big current problem in practical application, and, field effect transistor also has relatively high cut-in voltage, therefore has higher noise margin and antijamming capability.
The type selecting of magnetic structure designs according to the transmission range of the transmission characteristic of system and load, and there is different designing requirements different application scenarios.Magnetic structure due to wireless electric energy transmission system belongs to Loosely Coupled Architecture, launching and receiving end has very large air gap and both positions are energy relative movements, therefore as preferred embodiment, pass through circuit analysis, solenoid coil is adopted as the high-frequency emission coil 4 of magnetic structure and high-frequency reception coil 5, namely form inductive coupler coils and replace separable transformer formula and plate armature, line solenoid ring type produce magnetic field relatively evenly and there is good directivity, it has long transmission distance and efficiency advantages of higher simultaneously, and then the advantage reached compared with long-distance transmissions, and preferably iron core is set in solenoid coil, is conducive to increasing magnetic field intensity.In order to improve power delivery capabilities and the efficiency of inductive coupler coils, in the design process of inductive coupling type electric energy wireless transmitting system coupled inductor, we need the type selecting considering coupling coil.When to coupling coil winding mode type selecting, the factor such as volume, thickness of the coupling coil that system can allow must be considered, also need himself inductance value of coil that coiling is gone out to meet design requirement, consider quality factor and the Mutual Inductance Coupling coefficient and heat radiation etc. between the two of launching and receiving coil self.For the number of turn of the transmission characteristic coiling improving system is more few better, be conducive to like this reducing its loss.
In the utility model, power circuit 1 comprises that to have be the three terminal regulator that your end exports, and exports to high-frequency oscillating circuits 2, high-frequency emission coil 4 and NE555 work respectively; The voltage that power circuit 1 provides for high-frequency emission coil 4 is higher, and the energy that high-frequency emission coil 4 is coupled to high-frequency reception coil 5 is larger, and efficiency also improves relatively.Therefore first function demand supply voltage of power circuit 1 is the bigger the better.But because NE555 operating voltage is 5V, therefore, second effect of power circuit 1 determine power circuit 1 supply module also Yao You mono-road 5V voltage export.Secondly, the supply power voltage of high-frequency emission coil 4 needs the power supply of 12V, can carry out voltage stabilizing obtain with the secondary output of a slice LM7812 to transformer.The supply power voltage that high-frequency oscillating circuits 2 part needs is the power supply of 5V, can obtain with the voltage stabilizing of a slice LM7805 chip.In order to reduce the power consumption of integrated package, LM7805 input directly comes from the output of LM7812.
As shown in Figure 2, illustrate the workflow of a kind of embodiment of the utility model, it is engaged in a certain electronic product equipment such as mobile phone etc. and uses, can in the environment of wired and wireless charging, first electronic product can judge to treat whether to have electricity and the need of charging, if do not need charging, then work; If need charging, then can judge that charging equipment is wired charging or wireless charging, if connect charging wire, then directly adopt wired charging, if wireless, then respond to and whether meet wireless charging condition, meet, adopt wireless charging; Until charging complete.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (5)
1. a wireless charging device, it is characterized in that: comprise feeder ear and charging end, described feeder ear comprises power circuit (1), connect the high-frequency oscillating circuits (2) of power circuit (1), connect the high-frequency power amplifying circuit (3) of high-frequency oscillating circuits (2), and connect the high-frequency emission coil (4) of high-frequency power amplifying circuit (3); Described charging end comprises high-frequency reception coil (5), connects the rectifier filter circuit (6) of high-frequency reception coil (5) and connects the load unit (7) of rectifier filter circuit (6); Described high-frequency oscillating circuits (2) comprises the duty ratio adjustable pulse circuit (21) that NE555 is formed.
2. a kind of wireless charging device according to claim 1, is characterized in that: described high-frequency power amplifying circuit (3) comprises the field effect transistor (31) as power amplifier element.
3. a kind of wireless charging device according to claim 1 and 2, is characterized in that: described high-frequency emission coil (4) and high-frequency reception coil (5) are solenoid coil.
4. a kind of wireless charging device according to claim 3, is characterized in that: be provided with iron core in solenoid coil.
5. follow up a kind of wireless charging device according to claim 1, it is characterized in that: described power circuit (1) comprises the three terminal regulator with three-polar output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231352.3U CN204103575U (en) | 2014-05-07 | 2014-05-07 | A kind of wireless charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231352.3U CN204103575U (en) | 2014-05-07 | 2014-05-07 | A kind of wireless charging device |
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| Publication Number | Publication Date |
|---|---|
| CN204103575U true CN204103575U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420231352.3U Expired - Fee Related CN204103575U (en) | 2014-05-07 | 2014-05-07 | A kind of wireless charging device |
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| CN (1) | CN204103575U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836990A (en) * | 2017-02-11 | 2017-06-13 | 杭州亘幄电子科技有限公司 | Fingerprint lock with wireless charging function |
-
2014
- 2014-05-07 CN CN201420231352.3U patent/CN204103575U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836990A (en) * | 2017-02-11 | 2017-06-13 | 杭州亘幄电子科技有限公司 | Fingerprint lock with wireless charging function |
| CN106836990B (en) * | 2017-02-11 | 2018-12-21 | 杭州亘幄电子科技有限公司 | Fingerprint lock with wireless charging function |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20160507 |
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| CF01 | Termination of patent right due to non-payment of annual fee |