CN208971221U - A kind of wireless charging system - Google Patents
A kind of wireless charging system Download PDFInfo
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- CN208971221U CN208971221U CN201821488620.4U CN201821488620U CN208971221U CN 208971221 U CN208971221 U CN 208971221U CN 201821488620 U CN201821488620 U CN 201821488620U CN 208971221 U CN208971221 U CN 208971221U
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- electric current
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Abstract
The utility model discloses a kind of wireless charging systems, including wireless launcher and radio receiver, the wireless launcher includes transmitting coil, transmitting compensation network, transmitting converter, the radio receiver includes receiving coil, receives compensation network, receiving transducer, the phase difference between electric current in the phase and the receiving coil of the electric current in the transmitting coilNot equal to 90 degree, the phase differenceLess than 160 degree；By adjusting the load equivalent impedance or reception compensation network of the radio receiver, the phase difference is adjustedThe wireless charging system of the utility model can reduce the electromagnetic field intensity between wireless launcher and radio receiver, improve the safety of wireless charging.
Description
Technical field
The utility model relates to wireless charging technical fields, particularly relate to a kind of wireless charging system.
Background technique
Electric car has been subjected to generally approving and having obtained relatively broad popularize as a kind of new-energy automobile.Mesh
Before, the charging modes of electric car are broadly divided into wired charging and two kinds of wireless charging, wherein wireless charging mode, which has, to be not necessarily to
Bulky plug and cable are configured, manual operation is not necessarily to, without danger of hazardous electrical discharges, the advantages such as easy to use, thus by wireless charging
Technology is as main R&D direction.
According to the technical principle of wireless charging, between the transmitting coil of wireless transmitter and the receiving coil of wireless receiver
And surrounding can generate electromagnetic field, electromagnetic field crosses conference and generates harm to human body, moreover, metallics can be in excessive electromagnetic field
In seriously generate heat, it is possible to bring fire hazard.
Utility model content
In view of this, electromagnetic field intensity can be reduced the purpose of this utility model is that propose a kind of wireless charging system,
Improve the safety of wireless charging.
Based on above-mentioned purpose, the utility model provides a kind of wireless charging system, including wireless launcher and wireless
Reception device, the wireless launcher include transmitting coil, transmitting compensation network, transmitting converter, the radio receiver packet
It includes receiving coil, receive compensation network, receiving transducer,
The phase difference between electric current in the phase of electric current in the transmitting coil and the receiving coilIt is not equal to
90 degree.
Optionally, the phase differenceLess than 160 degree.
Optionally, the phase differenceEqual to 135 degree.
Optionally, by adjusting the load equivalent impedance of the radio receiver, the phase difference is adjusted
Optionally, by adjusting the reception compensation network of the radio receiver, the phase difference is adjusted
Optionally, the frequency of electric current is not equal to the receiving coil and receives the resonance of compensation network in the receiving coil
Frequency.
Optionally, under the frequency of the electric current of the receiving coil, the load equivalent impedance of the radio receiver is in
Perception.
Optionally, the frequency of electric current is not equal to the transmitting coil and emits the resonance of compensation network in the transmitting coil
Frequency.
Optionally, in the transmitting coil under the frequency of electric current, the load equivalent impedance of the wireless launcher is in
Perception.
Optionally, by adjusting the transmitting converter, the size of electric energy transimission power is adjusted.
From the above it can be seen that wireless charging system provided by the utility model, including wireless launcher and nothing
Line reception device, wireless launcher include transmitting coil, transmitting compensation network, transmitting converter, and radio receiver includes
Receiving coil receives compensation network, receiving transducer, between the electric current in the phase and receiving coil of the electric current in transmitting coil
Phase differenceNot equal to 90 degree, adjustment phase place is poorLess than 160 degree；By adjusting the load equivalent impedance of radio receiver
Or compensation network is received, adjustment phase place is poorThe utility model can reduce nothing under the premise of guaranteeing electric energy transimission power
Electromagnetic field intensity between line emitter and radio receiver improves the safety of wireless charging.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the simplification electrical block diagram of the wireless launcher of the utility model embodiment；
Fig. 2 is the simplification electrical block diagram of the radio receiver of the utility model first embodiment；
Fig. 3 is the equivalent circuit structure schematic diagram of circuit structure shown in Fig. 2；
When Fig. 4 is resonance frequency in transmitting coil in electric current and receiving coil electric current phase relation schematic diagram；
Fig. 5 is that the phase relation of electric current and electric current in receiving coil in transmitting coil in the utility model embodiment is illustrated
Figure；
Fig. 6 is the electric current curve synoptic diagram varying with frequency in the receiving coil of the utility model embodiment；
Fig. 7 is the simplification electrical block diagram of the radio receiver of the utility model second embodiment；
Fig. 8 is the simplification electrical block diagram of the radio receiver of the utility model 3rd embodiment；
Fig. 9 is the receiving coil of the utility model fourth embodiment and the simplification circuit structure signal for receiving compensation network
Figure；
Figure 10 is the receiving coil of the 5th embodiment of the utility model and the simplification circuit structure signal for receiving compensation network
Figure.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to attached drawing, the utility model is further described.
It should be noted that all statements for using " first " and " second " are for area in the utility model embodiment
Be divided to two non-equal entities of same names or non-equal parameter, it is seen that " first " " second " only for statement convenience,
It should not be construed as the restriction to the utility model embodiment, subsequent embodiment no longer illustrates this one by one.
Wireless charging system provided by the embodiment of the utility model includes wireless launcher and radio receiver.Fig. 1
For the simplification electrical block diagram of the wireless launcher of the utility model embodiment.As shown, the utility model is implemented
The wireless launcher that example provides, including transmitting coil 1, transmitting compensation network 2, transmitting converter 3, transmitting coil 1 and transmitting
Compensation network 2 is connected, and transmitting converter 3 and transmitting coil 1, transmitting compensation network 2 are electrically connected.The utility model embodiment
In, transmitting converter 3 is configured to by four switching tube S1-S4The controllable full-bridge inverter of composition, it is adjustable using transmitting converter 3
The size of whole electric energy transimission power.
Fig. 2 is the electrical block diagram of the radio receiver of the utility model first embodiment.As shown, this reality
The radio receiver provided with new embodiment, including receiving coil 4, reception compensation network 5, receiving transducer 6, receive line
Circle 4 is connected with compensation network 5 is received, and receiving transducer 6 and receiving coil 4 receive the electrical connection of compensation network 5.This is practical new
In type embodiment, receiving transducer 6 is configured to by four diode D1-D4Composition does not control full-bridge rectifier.
Fig. 6 is the electric current curve synoptic diagram varying with frequency in the receiving coil of the utility model embodiment,
When Fig. 4 is resonance frequency in transmitting coil in electric current and receiving coil electric current phase relation schematic diagram.As schemed
Show, at this point, the output electric current and output voltage same-phase of receiving coil and reception compensation network, i.e. receiving coil and reception compensate
When network reaches resonant state, receiving coil and the resonance frequency for receiving compensation network are fS, equivalent impedance is pure resistance, this
When, the electric current I in transmitting coilfPhase and receiving coil in electric current phase difference be 90 degree, in this case, emission lines
Electric current I in circlefElectric current I in the electromagnetic field and receiving coil of generationSThe intensity width of electromagnetic field synthesized by the electromagnetic field of generation
It is worth very big.
Fig. 5 is that the phase relation of electric current and electric current in receiving coil in transmitting coil in the utility model embodiment is illustrated
Figure.In conjunction with shown in Fig. 5,6, in the utility model embodiment, produced between wireless launcher and radio receiver to reduce
Raw electromagnetic field intensity adjusts the electric current I in receiving coil 4S, so that the electric current I in receiving coil 4SThe frequency f of `0, so that frequency
Rate f0Not equal to the resonance frequency f of receiving coil 4 and reception compensation network 5S, at this point, the electric current I in transmitting coil 1fPhase
With the electric current I in receiving coil 4SThe phase difference of ` is not equal to 90 degree, that is, controls and receives coil 4 with compensation network 5 is received and be in non-
Resonant state, to reduce electromagnetic field intensity.
Electric current I while reducing electromagnetic field intensity, to guarantee power transmission efficiency, in transmitting coil 1fPhase with
Electric current I in receiving coil 4SPhase difference between the phase of `Less than 160 degree.In the utility model embodiment, hair is adjusted
Electric current I in ray circle 1fPhase and receiving coil 4 in electric current ISPhase difference between the phase of `Equal to 135 degree, this
When, it being capable of electric current I under conditions of guaranteeing same transmission power, in transmitting coil 1fThe electromagnetic field and receiving coil 4 of generation
In electric current ISThe intensity amplitude of electromagnetic field synthesized by the electromagnetic field that ` is generated can greatly reduce, and improve the safety of wireless charging
Reliability.
According to circuit theory:
When receiving coil and receive compensation network be under resonant state, have:
Wherein, fSFor resonance frequency, CSFor the capacitance of the reception compensation network under resonant state, LSFor under resonant state
The inductance value of receiving coil.
If receiving the capacitance C of compensation networkS1Greater than the capacitance C under resonant stateS, it may be assumed that
Then, the electric current I in transmitting coilfPhase and receiving coil in electric current ISPhase between phase difference be greater than
90 degree, the frequency of the electric current in receiving coil is f0, at this point, receiving coil and the load equivalent impedance for receiving compensation network are in sense
Property.
Fig. 3 is the equivalent circuit structure schematic diagram of circuit structure shown in Fig. 2.As shown, receiving coil 4 is equivalent to first
40 (L of inductance coilS1) and 41 (L of the second inductance coilS2), it receives compensation network 5 and is equivalent to capacitor CS, according to radio receiver
Equivalent circuit, the inductance L of receiving coilSAre as follows:
Ls=Ls1+Ls2
Wherein, when the power frequency in receiving coil 4 is f0When, the second inductance coil LS2Resonance occurs with capacitor Cs, it may be assumed that
At this point, the load equivalent impedance of circuit is in perception, equivalent impedance are as follows:
Z=j ω Ls1+R
Electric current I in receiving coil 4S` are as follows:
Wherein, M is mutual inductance, and ω is the angular frequency of sinusoidal quantity.
According to foregoing circuit principle, as the inductance value L of the first inductance coilS1When=0, the inductance L of receiving coilSAnd reception
The capacitor C of compensation networkSResonance, the electric current I in transmitting coil 1 occursfPhase and receiving coil 4 in electric current ISPhase
Between phase difference should be 90 degree.And as the inductance value L of the first inductance coilS1When > 0, the load equivalent impedance of circuit is in sense
Property, electric current I in transmitting coil 1fPhase and receiving coil 4 in electric current ISPhase difference between the phase of ` is greater than 90 degree, and
Phase differenceBy the inductance value L of the first inductance coilS1It is determined with the ratio of resistance R, it may be assumed that
By the formula as it can be seen that by adjusting radio receiver load equivalent impedance or receive compensation network, can adjust
Electric current I in whole transmitting coil 1fPhase and receiving coil 4 in electric current ISPhase difference between the phase of `
In the utility model embodiment, the frequency of the electric current in transmitting coil 1 is not equal to transmitting coil 1 and transmitting compensation net
The resonance frequency of network 2, the frequency of the electric current in transmitting coil 1 are equal to the operating switch frequency of transmitting converter 3.That is, when wireless
When the transmitting converter 3 of emitter is worked under operating switch frequency, transmitting coil 1 and transmitting compensation network 2 are in anharmonic
Vibration state.In transmitting coil 1 under the frequency of electric current, the load equivalent impedance of wireless launcher is conducive at this time in perception
The Sofe Switch for realizing transmitting converter, improves efficiency.
For the radio receiver of first embodiment shown in Fig. 2, receiving transducer 6 is configured to not control full-bridge rectification
Circuit structure initial configuration is electric current I in transmitting coil 1 by devicefPhase and receiving coil 4 in electric current ISBetween the phase of `
Phase difference be greater than 90 degree, the subsequent size that can not adjust load equivalent impedance.
Fig. 7 is the electrical block diagram of the radio receiver of the utility model second embodiment.As shown, this reality
With in novel second embodiment, radio receiver includes receiving coil 4A, receives compensation network 5A, receiving transducer 6A, is connect
Take-up circle 4A connects with compensation network 5A is received, and receiving transducer 6A and receiving coil 4A, receives compensation network 5A electrical connection.
Wherein, receiving transducer 6A is by two diode D1、D2With two switching tube S1、S2The rectifier bridge of composition, passes through control switch
Pipe S1、S2On-off, the size of adjustable load equivalent impedance, so as to adjust the electric current I in transmitting coil 1fPhase
With the electric current I in receiving coil 4SPhase difference between the phase of `
Fig. 8 is the electrical block diagram of the radio receiver of the utility model 3rd embodiment.As shown, this reality
With in novel 3rd embodiment, radio receiver includes receiving coil 4B, receives compensation network 5B, receiving transducer 6B, is connect
Take-up circle 4B connects with compensation network 5B is received, and receiving transducer 6B and receiving coil 4B, receives compensation network 5B electrical connection.
Wherein, the circuit structure of receiving transducer 6B is by four diode D1、D2、D3、D4Composition does not control full-bridge rectifier and switch
Pipe S is in parallel, then with diode D5Series connection, by the on-off of control switch pipe S, the size of adjustable load equivalent impedance,
So as to adjust the electric current I in transmitting coil 1fPhase and receiving coil 4 in electric current ISPhase difference between the phase of `
Fig. 9 is the receiving coil of the utility model fourth embodiment and the electrical block diagram for receiving compensation network.Such as
Shown in figure, in the utility model fourth embodiment, receiving coil 4C and to receive compensation network 5C in parallel, receiving transducer with connect
Take-up circle 4C and reception compensation network 5C electrical connection.
Figure 10 is the receiving coil of the 5th embodiment of the utility model and the electrical block diagram for receiving compensation network.Such as
Shown in figure, in the 5th embodiment of the utility model, receiving compensation network 5D includes capacitor CS, inductance Lb, receiving coil 4D and electricity
Hold CSParallel connection, then with inductance LbSeries connection, constitutes LCL circuit, and receiving transducer and receiving coil 4D, reception compensation network 5D are electrical
Connection.
The utility model embodiment also provides a kind of wireless charging method realized based on the wireless charging system, packet
It includes: the phase difference between electric current in the phase and receiving coil of the electric current in adjustment transmitting coilNot equal to 90 degree.
In the utility model embodiment, the phase of the electric current in the phase and receiving coil of the electric current in transmitting coil is adjusted
Between phase differenceLess than 160 degree.
Load equivalent impedance or reception compensation net in the utility model embodiment, by adjusting radio receiver
Network adjusts the phase difference
The device of above-described embodiment for realizing method corresponding in previous embodiment there is corresponding method to implement
The beneficial effect of example, details are not described herein.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under the thinking of the utility model, the above reality
Applying can also be combined between the technical characteristic in example or different embodiments, and step can be realized with random order, and be deposited
In many other variations of the different aspect of the utility model as described above, for simplicity, they are not provided in details.
In addition, to simplify explanation and discussing, and in order not to which the utility model indigestion can be made, in provided attached drawing
In can show or can not show and connect with the well known power ground of integrated circuit (IC) chip and other components.In addition,
Device can be shown in block diagram form, to avoid making the utility model indigestion, and this has also contemplated following facts,
Details i.e. about the embodiment of these block diagram arrangements be height depend on will implement the utility model platform (that is,
These details should be completely within the scope of the understanding of those skilled in the art).Elaborate detail (for example, circuit) with
In the case where the exemplary embodiment for describing the utility model, it will be apparent to those skilled in the art that can be
Without implementing the utility model in the case where these details or in the case that these details change.Therefore, this
A little descriptions should be considered as illustrative rather than restrictive.
Although having been incorporated with specific embodiment of the utility model the utility model is described, before
The description in face, many replacements of these embodiments, modifications and variations will be apparent for those of ordinary skills
's.For example, discussed embodiment can be used in other memory architectures (for example, dynamic ram (DRAM)).
The embodiments of the present invention are intended to cover fall into all such within the broad range of appended claims
Replacement, modifications and variations.Therefore, within the spirit and principle of the utility model, any omission for being made, modification, equivalent
Replacement, improvement etc., should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of wireless charging system, including wireless launcher and radio receiver, which includes transmitting
Coil, transmitting compensation network, transmitting converter, the radio receiver include receiving coil, receive compensation network, receive transformation
Device, which is characterized in that
The phase difference between electric current in the phase of electric current in the transmitting coil and the receiving coilNot equal to 90 degree.
2. wireless charging system according to claim 1, which is characterized in that the phase differenceLess than 160 degree.
3. wireless charging system according to claim 2, which is characterized in that the phase differenceEqual to 135 degree.
4. wireless charging system according to claim 1, which is characterized in that by adjusting the negative of the radio receiver
Equivalent impedance is carried, the phase difference is adjusted
5. wireless charging system according to claim 1, which is characterized in that by adjusting connecing for the radio receiver
Compensation network is received, the phase difference is adjusted
6. wireless charging system according to claim 1, which is characterized in that the frequency of electric current differs in the receiving coil
In the resonance frequency of the receiving coil and reception compensation network.
7. wireless charging system according to claim 6, which is characterized in that in the frequency of the electric current of the receiving coil
Under, the load equivalent impedance of the radio receiver is in perception.
8. wireless charging system according to claim 1, which is characterized in that the frequency of electric current differs in the transmitting coil
In the resonance frequency of the transmitting coil and transmitting compensation network.
9. wireless charging system according to claim 8, which is characterized in that the frequency of electric current in the transmitting coil
Under, the load equivalent impedance of the wireless launcher is in perception.
10. wireless charging system according to claim 1, which is characterized in that by adjusting the transmitting converter, adjustment
The size of electric energy transimission power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821488620.4U CN208971221U (en) | 2018-09-12 | 2018-09-12 | A kind of wireless charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821488620.4U CN208971221U (en) | 2018-09-12 | 2018-09-12 | A kind of wireless charging system |
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| Publication Number | Publication Date |
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| CN208971221U true CN208971221U (en) | 2019-06-11 |
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ID=66755058
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821488620.4U Active CN208971221U (en) | 2018-09-12 | 2018-09-12 | A kind of wireless charging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274164A (en) * | 2018-09-12 | 2019-01-25 | 北京有感科技有限责任公司 | A kind of wireless charging system and method |
| CN110932373A (en) * | 2019-11-29 | 2020-03-27 | 北京有感科技有限责任公司 | Adjusting method of wireless charging system |
-
2018
- 2018-09-12 CN CN201821488620.4U patent/CN208971221U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274164A (en) * | 2018-09-12 | 2019-01-25 | 北京有感科技有限责任公司 | A kind of wireless charging system and method |
| CN110932373A (en) * | 2019-11-29 | 2020-03-27 | 北京有感科技有限责任公司 | Adjusting method of wireless charging system |
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Address after: 230088 China (Anhui) pilot Free Trade Zone, Hefei, Anhui Province a3-15, 14 / F, block a, building J1, phase II, innovation industrial park, No. 2800, innovation Avenue, high tech Zone, Hefei Patentee after: Hefei Yougan Technology Co.,Ltd. Address before: D412-1, floor 3, block D, No. 9, Shangdi Third Street, Haidian District, Beijing 100089 Patentee before: BEIJING INVISPOWER TECHNOLOGY Co.,Ltd. |