CN107492956A - A kind of wireless charging system of achievable multi-coil screening - Google Patents
A kind of wireless charging system of achievable multi-coil screening Download PDFInfo
- Publication number
- CN107492956A CN107492956A CN201710868886.5A CN201710868886A CN107492956A CN 107492956 A CN107492956 A CN 107492956A CN 201710868886 A CN201710868886 A CN 201710868886A CN 107492956 A CN107492956 A CN 107492956A
- Authority
- CN
- China
- Prior art keywords
- screening
- circuit
- wireless charging
- control module
- resonance transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
Abstract
The present invention discloses a kind of wireless charging system of achievable multi-coil screening, including wireless charging transmitter and wireless charging receiver, the wireless charging transmitter include：Power supply unit, charge control module, screening unit and resonance transmission circuit；The charge control module sends control signal to each screening unit, and is transferred to each resonance transmission circuit being connected with screening unit；After a resonance transmission circuit senses wireless charging receiver, the resonance transmission circuit will produce a charging signals, and be transferred to the screening unit being connected with the resonance transmission circuit；After screening unit control receives the charging signals of feedback, control the power supply unit with screening unit connection to be discharged to corresponding resonance transmission circuit, complete charging screening.It is of the invention that screening not only is realized to the device for needing to charge in certain limit, control the transmitting coil without setting position to be charged to stop electric discharge, moreover it is possible to realize multiple devices to be charged while wireless charging in certain limit.
Description
Technical field
The present invention relates to wireless charging technical field, more particularly to a kind of wireless charging system of achievable multi-coil screening
System.
Background technology
Wireless charging device be different from wired charging a big advantage be wireless charging device charging freedom and can
Embeddability.When being charged by wireless charging device, as long as wireless charging module is embedded into desk, on chair handle,
User's can is when talking public affair, the when of waiting, accomplishes to put down mobile phone charging whenever and wherever possible when even friend meets.
Current wireless charging technology mainly utilizes electromagnetic induction principle, by electromagnetic induction principle transmission energy need by
One transmitting coil launches electromagnetic wave, and another coil receives electromagnetic wave.Electric energy is received and dispatched by the transmission of electromagnetic wave, realized
The wireless charging of mobile terminal.In order to improve free degree when terminal is electrically charged, expand effective charging area of wireless charging, it is real
Existing mobile terminal is freely charged within the specific limits, and the wireless charging technology based on multiple transmitting coils is arisen at the historic moment.
Man-to-man charge mode is expanded to many-one, the form of multi-to-multi by the wireless charging technology of multiple coils.One
Individual wireless charging device includes receiver and transmitter, and wherein receiver and transmitter transmits energy by its respective charge coil
Amount.The inductance value of charge coil on transmitter usually requires very big effectively to transmit energy with the receiving coil on recipient
Amount.When the receiving coil for receiving end module is placed on transmitting coil array, corresponding coil transmissions on transmitting coil array
Electromagnetic wave is powered to receiving module.
However, because wireless charger has multiple coils, if each coil keeps charged state simultaneously, for electricity
Loss it is huge, can not only damage band charging device, also bring along potential safety hazard.A kind of it would therefore be desirable to control coil battle array
The scheme of each coil charges state in row, screening is realized to certain coil for effectively needing to charge in chargeable range, so as to reach
To the notable purpose for saving electric energy.The prior art is defective, it is necessary to improve.
The content of the invention
The purpose of the present invention is overcome the deficiencies in the prior art, there is provided a kind of wireless charging system of achievable multi-coil screening
System, screening is realized to certain coil for effectively needing to charge in chargeable range.
Technical scheme is as follows：A kind of wireless charging system of achievable multi-coil screening, including wireless charging
Transmitter and wireless charging receiver, the wireless charging transmitter include：Power supply unit, charge control module, screening unit
And resonance transmission circuit；The output end of the charge control module connects several screening units, some screening units
Output end connects a resonance transmission circuit respectively, and the output end of said supply unit connects some screening units respectively；
The charge control module sends control signal to each screening unit, and is transferred to corresponding with each screening unit
Each resonance transmission circuit of connection；After a resonance transmission circuit senses wireless charging receiver, resonance ejection electricity
Road will produce a charging signals, and be transferred to the screening unit being connected with the resonance transmission circuit；The screening unit controls
After the charging signals for receiving feedback, control power supply unit discharges to corresponding resonance transmission circuit, completes charging screening.
Further, the screening unit includes：Logic control module, inverter circuit and filter circuit；The logic control
The output end of the input connection charge control module of molding block, the input of the output end connection inverter circuit of Logic control module
End；The output end connection filter circuit of inverter circuit, the output end connection resonance transmission circuit of filter circuit；Inverter circuit it is defeated
Enter end and be also connected with power supply unit；
The charge control module exports a control signal and is output to inverter circuit, inversion electricity by Logic control module
Road produces an electric signal to filter circuit, and is transferred to resonance transmission circuit；Filter circuit senses according to resonance transmission circuit
Result produce an electric signal, and feed back to Logic control module, the electric signal that Logic control module feeds back according to filter circuit
The conducting of inverter circuit is controlled, so as to control power supply unit to be charged to resonance transmission circuit.
Further, the filter circuit feeds back to the frequency of the electric signal of Logic control module by resonance transmission circuit
Influence, when resonance transmission circuit senses the receiving coil in wireless charging receiver, electric signal caused by filter circuit
Frequency shift.
Further, the charge control module includes a main control chip；The main control chip sends the PWM of certain frequency
Control signal is output on inverter circuit by Logic control module, and the inverter circuit produces one after receiving pwm control signal
The electric signal transmission of frequency is determined to filter circuit.
Further, the result that the filter circuit senses according to resonance transmission circuit produces the feedback telecommunications of certain frequency
Number, and feed back to Logic control module；The Logic control module compares the feedback electric signal and inversion electricity of filter circuit output
The electric signal of road output produces pwm control signal, so as to controlling inverter circuit conducting state.
Further, said supply unit includes：Power supply, regulator rectifier circuit and AC-DC translation circuits；The power supply
Output end connects regulator rectifier circuit, the output end connection AC-DC translation circuits of the regulator rectifier circuit.
Further, the resonance transmission circuit includes single or multiple transmitting coils.
Using such scheme, the present invention provides a kind of wireless charging system of achievable multi-coil screening, can not only realize
Multiple devices to be charged while wireless charging in certain limit, moreover it is possible to screening is realized to the device for needing to charge in certain limit,
Control the transmitting coil without setting position to be charged to stop electric discharge, significantly save electric energy so as to reach, safeguard the mesh of Electrical Safety
's；It can also improve and improve the chargeable area of wireless charging device, add the application of wireless charging.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Structure according to these accompanying drawings obtains other accompanying drawings.
Fig. 1 is the part-structure schematic diagram of the present invention；
Fig. 2 is not place the filter circuit Parameter Map after receiving coil；
Fig. 3 is to place the filter circuit Parameter Map after receiving coil；
Fig. 4 is the circuit theory diagrams of filter circuit；
Fig. 5 is the circuit theory diagrams of inverter circuit；
Fig. 6 is the logic diagram of Logic control module.
Wherein, m1 represents the frequency of transmitting coil in Fig. 2 and Fig. 3, and m2 represents the frequency of receiving coil.Inductance L2 in Fig. 4
Represent transmitting coil.The realization, functional characteristics and advantage of the object of the invention will be done furtherly referring to the drawings in conjunction with the embodiments
It is bright.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Shown in reference picture 1, the present invention provides a kind of wireless charging system of achievable multi-coil screening, including wireless charging
Transmitter and wireless charging receiver, the wireless charging transmitter include：Power supply unit 4, charge control module 1, screening are single
Member 2 and resonance transmission circuit 3；The output end of the charge control module 1 connects several screening units 2, some screenings
The output end of unit 2 connects a resonance transmission circuit 3 respectively, and the output end of said supply unit 4 connects some screening lists respectively
Member 2；The charge control module 1 sends control signal to each screening unit 2, and be transferred to be connected with screening unit 2 it is each
Individual resonance transmission circuit 3；After a resonance transmission circuit 3 senses wireless charging receiver, the resonance transmission circuit 3 will
A charging signals are produced, and are transferred to the screening unit 2 being connected with the resonance transmission circuit 3；The screening unit 2 control receives
After the charging signals of feedback, the power supply unit 4 with the screening unit 2 connection is controlled to be discharged to corresponding resonance transmission circuit 3, it is complete
Screened into charging.
As a kind of embodiment, said supply unit 4 includes：Power supply, regulator rectifier circuit and AC-DC translation circuits；Institute
State the output end connection regulator rectifier circuit of power supply, the output end connection AC-DC translation circuits of the regulator rectifier circuit.AC-
The output end of DC translation circuits connects each screening unit 2.
The screening unit 2 includes：Logic control module 21, inverter circuit 22 and filter circuit 23；The logic control
The output end of the input connection charge control module 1 of module 21, the output end connection inverter circuit 22 of Logic control module 21
Input, inverter circuit 22 output end connection filter circuit 23, filter circuit 23 output end connection resonance transmission circuit
3；The input of inverter circuit 22 is also connected with power supply unit 4；The charge control module 1 exports a control signal and passes through logic
Control module 21 is output to inverter circuit 22, and inverter circuit 22 produces an electric signal to filter circuit 23, and is transferred to resonance hair
Transmit-receive radio road 3；The result that filter circuit 23 senses according to resonance transmission circuit 3 produces an electric signal, and feeds back to logic control
Module 21, the electric signal that Logic control module 21 feeds back according to filter circuit 23 controls the conducting of inverter circuit 22, so as to control
Power supply unit 4 charges to resonance transmission circuit 3.
The charge control module 1 includes a main control chip；The main control chip sends the pwm control signal of certain frequency
It is output to by Logic control module 21 on inverter circuit 22, the inverter circuit 22 produces necessarily after receiving pwm control signal
The electric signal transmission of frequency is to filter circuit 23.The result that the filter circuit 23 senses according to resonance transmission circuit 3 produces one
Determine the feedback electric signal of frequency, and feed back to Logic control module 21；It is defeated that the Logic control module 21 compares filter circuit 23
Electric signal that the feedback electric signal that goes out exports with inverter circuit 22 produces pwm control signal, so as to control inverter circuit 22 to lead
Logical state.
The resonance transmission circuit 3 includes single or multiple transmitting coils.As a kind of embodiment, transmitting coil can be set
Put in filter circuit 23, a kind of filter circuit 23 is provided in Fig. 4, including：Electric capacity C1, electric capacity C2, inductance L1, inductance L2 and
Inductance L3, wherein, inductance L2 is transmitting coil；It is grounded after an inductance L2 termination capacitor C1, the inductance L2 other end connects successively
It is grounded after meeting electric capacity C2 and inductance L3, inductance L1 is connected in parallel on electric capacity C1 both ends, and electric capacity C3 is connected in parallel on inductance L3 both ends.Pass through
The electric elements of different induction value or capacitance are chosen, the electrical characteristics such as the centre frequency of filter circuit 23 can be adjusted.
A kind of inverter circuit 22 is provided in Fig. 5, including：Metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4；Metal-oxide-semiconductor
Q1 and metal-oxide-semiconductor Q2 D poles connect power supply unit 4, and metal-oxide-semiconductor Q1 S poles connect metal-oxide-semiconductor Q3 D poles, and metal-oxide-semiconductor Q2 S poles meet metal-oxide-semiconductor Q4
D poles, metal-oxide-semiconductor Q3 S poles ground connection, metal-oxide-semiconductor Q4 S poles ground connection.The input of filter circuit 23 terminate at metal-oxide-semiconductor Q1 S poles and
Between metal-oxide-semiconductor Q3 D poles, the output of filter circuit 23 is terminated between metal-oxide-semiconductor Q2 S poles and metal-oxide-semiconductor Q4 D poles.Metal-oxide-semiconductor Q1
The output end of Logic control module 21 is connected with metal-oxide-semiconductor Q3 G poles, metal-oxide-semiconductor Q2 connects logic control mould with metal-oxide-semiconductor Q4 G poles
The input of block 21.
Shown in reference picture 2 and Fig. 3, the main control chip sends pwm control signal and is output to by Logic control module 21
Inverter circuit 22, the electric signal that inverter circuit 22 can produce certain frequency are sent to filter circuit 23.Hair in filter circuit 23
After ray circle senses the receiving coil in wireless charging receiving circuit, due to the coupling between two coils, two lines
Coupling sense can be produced between circle, filter circuit 23 produces the electric signal of certain frequency.As a kind of embodiment, main control chip can be with
It is that TI is applied to the wireless charging chip BQ500212A of BPP (power is less than 5W emitter chip), wireless charging chip
BQ500412；Wireless charging chip BQ500215 applied to EPP (emitter chip of the power between 5-15W)；Can also
It is the wireless charging chip P9242_R that IDT is applied to EPP.Logic control module can use 51 single-chip microcomputers, STM32 single-chip microcomputers etc..
Refer again to shown in Fig. 4 and Fig. 5, when inverter circuit 22 is sent to the frequency and filtered electrical of the electric signal of filter circuit 23
When the caused frequency when transmitting coil senses receiving coil of road 23 is of substantially equal, electric signal caused by inverter circuit 22 does not have
Have and filtered by filter circuit 23, electric energy caused by power supply unit 4 is transferred to receiving coil by transmitting coil；When inverter circuit 22
It is caused when transmitting coil senses receiving coil to be sent to the frequency of the electric signal of filter circuit 23 and filter circuit 23
When frequency phase-difference is very big, electric signal will be attenuated caused by inverter circuit 22, and now, no electric energy is launched coil and sent out
Go.
Logic control module 21 detects the feedback signal of a filter circuit 23 at regular intervals.Produced from inverter circuit 22
If raw electric signal is not attenuated at, 1 is fed back, otherwise feeds back 0.The feedback signal that Logic control module 21 receives is 0,
Illustrate that centre frequency caused by filter circuit 23 differs greatly with signal frequency caused by inverter circuit 22, inverter circuit 22 produces
Raw electric signal is attenuated, without placement receiving coil on the transmitting coil in corresponding filter circuit 23.Now, logic control mould
Block 21 will block pwm signal to be transferred to inverter circuit 22, to reduce the power attenuation on inverter circuit 22.
The feedback signal that Logic control module 21 receives is 1, illustrates the centre frequency and inverter circuit of filter circuit 23
Signal frequency is essentially identical caused by 22, and electric signal caused by inverter circuit 22 is not attenuated at, in corresponding filter circuit 23
Transmitting coil on placed receiving coil.Now, Logic control module 21 will keep pwm signal to be transferred to inverter circuit
22, caused alternating current can is transmitted on receiving coil by transmitting coil on inverter circuit 22.
For example, Logic control module 21 sends G pole of the pwm signal 1 to metal-oxide-semiconductor Q1 in Fig. 6, when the center of filter circuit 23
Frequency and signal frequency caused by inverter circuit 22 are essentially identical, when electric signal caused by inverter circuit 22 is not attenuated at,
Logic control module 21 will keep sending pwm signal 1 and be transferred to metal-oxide-semiconductor Q3 G poles, caused alternating current on inverter circuit 22
Can is transmitted on receiving coil by transmitting coil.
When centre frequency caused by filter circuit 23 differs greatly with signal frequency caused by inverter circuit 22, inversion is electric
Electric signal caused by road 22 is attenuated, without placement receiving coil on the transmitting coil in corresponding filter circuit 23.Now, logic
Control module 21 will block pwm signal 1 to be transferred to inverter circuit 22, to reduce the power attenuation on inverter circuit 22.
As a kind of embodiment, charge control module 1 and filter circuit 23 are electrically connected with, and pass through feedback resonance radiating circuit
3 electric signal keeps communicating, so as to maintain charged state after coil screening is completed.So if it is intended to giving multiple electrical appliances
Power simultaneously if, each electrical appliance will be corresponding to a charge controlling chip.So, a charge control module 1 will include more
Individual TI and IDT charging chip, realize lasting charging of the resonance transmission circuit 3 to charger.
In summary, the present invention provides a kind of wireless charging system of achievable multi-coil screening, can not only realize certain
In the range of multiple devices to be charged wireless charging simultaneously, moreover it is possible to screening, control are realized to the device that needs to charge in certain limit
Transmitting coil without setting position to be charged stops electric discharge, significantly saves electric energy so as to reach, safeguards the purpose of Electrical Safety；Also
The chargeable area of wireless charging device can be improved, adds the application of wireless charging.
These are only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made within principle etc., should be included in the scope of the protection.
Claims (5)
1. a kind of wireless charging system of achievable multi-coil screening, including wireless charging transmitter and wireless charging receiver,
Characterized in that, the wireless charging transmitter includes：Power supply unit, charge control module, screening unit and resonance ejection electricity
Road；The output end of the charge control module connects several screening units, and the output end of some screening units connects respectively
A resonance transmission circuit is connect, the output end of said supply unit connects some screening units respectively；
The charge control module sends control signal to each screening unit, and be transferred to be connected with screening unit it is each humorous
Shake radiating circuit；After a resonance transmission circuit senses wireless charging receiver, the resonance transmission circuit will produce one
Individual charging signals, and it is transferred to the screening unit being connected with the resonance transmission circuit；Screening unit control receives filling for feedback
After electric signal, control the power supply unit with screening unit connection to be discharged to corresponding resonance transmission circuit, complete charging screening.
2. the wireless charging system of achievable multi-coil screening according to claim 1, it is characterised in that the screening is single
Member includes：Logic control module, inverter circuit and filter circuit；The input connection charge control mould of the Logic control module
The output end of block, the input of the output end connection inverter circuit of Logic control module；The output end connection filtering of inverter circuit
Circuit, the output end connection resonance transmission circuit of filter circuit；The input of inverter circuit is also connected with power supply unit；
The charge control module exports a control signal and is output to inverter circuit, inverter circuit production by Logic control module
A raw electric signal is transferred to resonance transmission circuit to filter circuit；The knot that filter circuit senses according to resonance transmission circuit
Fruit produces an electric signal, and feeds back to Logic control module, and the electric signal that Logic control module feeds back according to filter circuit controls
The conducting of inverter circuit, so as to control power supply unit to be charged to resonance transmission circuit.
3. the wireless charging system of achievable multi-coil screening according to claim 2, it is characterised in that the charging control
Molding block includes one or more main control chips；The pwm control signal that the main control chip sends certain frequency passes through logic control
Molding block is output on inverter circuit, and the inverter circuit receives the electric signal transmission of generation certain frequency after pwm control signal
To filter circuit.
4. the wireless charging system of achievable multi-coil screening according to claim 1, it is characterised in that the power supply is single
Member includes：Power supply, regulator rectifier circuit and AC-DC translation circuits；The output end connection regulator rectifier circuit of the power supply, it is described
The output end connection AC-DC translation circuits of regulator rectifier circuit.
5. the wireless charging system of achievable multi-coil screening according to claim 1, it is characterised in that the resonance hair
Transmit-receive radio road includes single or multiple transmitting coils.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710868886.5A CN107492956A (en) | 2017-09-22 | 2017-09-22 | A kind of wireless charging system of achievable multi-coil screening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710868886.5A CN107492956A (en) | 2017-09-22 | 2017-09-22 | A kind of wireless charging system of achievable multi-coil screening |
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| Publication Number | Publication Date |
|---|---|
| CN107492956A true CN107492956A (en) | 2017-12-19 |
Family
ID=60652975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710868886.5A Pending CN107492956A (en) | 2017-09-22 | 2017-09-22 | A kind of wireless charging system of achievable multi-coil screening |
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| CN109038766A (en) * | 2018-10-09 | 2018-12-18 | 深圳市方昕科技有限公司 | One kind one fills three wireless charging systems |
| CN110212651A (en) * | 2019-05-21 | 2019-09-06 | 深圳市优笔触控科技有限公司 | Twin coil antenna plate and its control circuit |
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| CN109038766A (en) * | 2018-10-09 | 2018-12-18 | 深圳市方昕科技有限公司 | One kind one fills three wireless charging systems |
| CN110212651A (en) * | 2019-05-21 | 2019-09-06 | 深圳市优笔触控科技有限公司 | Twin coil antenna plate and its control circuit |
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