CN107959357A - A kind of wireless charging receiving circuit, frequency adjusting method and smart machine - Google Patents
A kind of wireless charging receiving circuit, frequency adjusting method and smart machine Download PDFInfo
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- CN107959357A CN107959357A CN201711224616.7A CN201711224616A CN107959357A CN 107959357 A CN107959357 A CN 107959357A CN 201711224616 A CN201711224616 A CN 201711224616A CN 107959357 A CN107959357 A CN 107959357A
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- 239000003990 capacitor Substances 0.000 claims abstract description 32
- 230000005611 electricity Effects 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 9
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- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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Classifications
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- 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
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- H02J7/025—
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Abstract
The invention discloses a kind of wireless charging receiving circuit, frequency adjusting method and smart machine.The circuit includes receiving coil including at least one tunable capacitor and the capacitance module and rectification module of at least one fixed capacity；Receiving coil receives input exchange signal, and frequency to predeterminated frequency or scope, the AC signal of capacitance module adjustment AC signal is direct current signal by rectification module output；Receiving coil, capacitance module and rectification module are sequentially connected in series.The present invention is by adjusting fixed capacity and the capacitance size of tunable capacitor in capacitance module, so as to change the resonant frequency of circuit, circuit is worked in preset frequency or scheduled frequency range, so as to which the resonant frequency with wireless charging transmitting terminal circuit is mutually matched, the efficiency of wireless charging is improved.
Description
Technical field
The present invention relates to wireless charging technical field, more particularly to a kind of wireless charging receiving circuit, frequency adjusting method
And smart machine.
Background technology
Nowadays increasingly mature, wireless charging product also increasingly enrich wireless charging technology.The wireless charging of mainstream at present
Power technology mainly includes two kinds of electromagnetic induction and magnetic resonance technology, but is limited to the difference of technical principle, based on electromagnetic induction
The wireless charging system maximum functional distance of principle is no more than 10mm, and the wireless charging system of utilization magnetic resonance technology can be with
Operating distance is brought up into tens mm, thus is had been to be concerned by more and more people.When two objects have identical vibration frequency,
Resonate in other words in a specific frequency, they can exchange mutual energy.Magnetic resonance wireless charging is exactly to utilize
This point, magnetic field, that is, oscillating magnetic field of a fixed frequency vibration, the vibration frequency in secondary coil magnetic field are produced by primary coil
Rate is just same, so as to produce resonance, and realizes energy transfer.Wireless charging leagues dictate is based on magnetic resonance technology
Wireless charging system resonant frequency is 6.78MHz, and error is +/- 15KHz.But in actual system, even if using identical
Receiving terminal coil design, material, the difference of coiling technique, the coil inductance of final output are considered in manufacturing process
Also certain difference is had.And existing circuit design can not compensate the difference of this coil inductance value, cause whole system
Resonant frequency can not be fixed at the centre frequency of 6.78MHz, whole wireless charging system it is inefficient.
The content of the invention
It can not be fixed on to solve wireless charging system resonant frequency proposed in the above background technology at centre frequency
The problem of causing the charge efficiency of wireless charging system not high, the present invention provides a kind of wireless charging receiving circuit, frequency tune
Adjusting method and smart machine.
According to an aspect of the present invention, there is provided a kind of wireless charging receiving circuit, circuit is including receiving coil including extremely
The capacitance module and rectification module of a few tunable capacitor and at least one fixed capacity；Receiving coil receives input AC letter
Number, frequency to predeterminated frequency or scope, the AC signal of capacitance module adjustment circuit is direct current signal by rectification module output；
Receiving coil, capacitance module and rectification module are sequentially connected in series.
Preferably, capacitance module includes the first capacitance module, and the first capacitance module is including at least one tunable capacitor and extremely
A few fixed capacity, tunable capacitor and fixed capacity it is parallel with one another after, be connected in series with the first end of receiving coil.
Preferably, capacitance module further includes the second capacitance module, the second capacitance module include at least one tunable capacitor and
At least one fixed capacity, tunable capacitor and fixed capacity it is parallel with one another after, be connected in series with the second end of receiving coil.
Preferably, capacitance module further includes the switch element parallel with one another with fixed capacity and tunable capacitor.
Preferably, circuit further includes first switch module and second switch module；
First switch block coupled in series is connected between receiving coil and capacitance module, for disconnect or connect receiving coil with
Capacitance module；
Second switch block coupled in series is connected between capacitance module and rectification module, for disconnect or connect capacitance module with
Rectification module.
Preferably, first switch module is controllable switch or Zero-ohm resistor；Second switch module for controllable switch or
Person's Zero-ohm resistor.
Preferably, rectification module includes bridge modules and includes the filter module of at least one capacitance, and bridge modules are by electricity
The AC signal of molar block output is converted to direct current signal, and the filtered module of direct current signal is exported to storage battery.
Preferably, bridge modules include the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode
D4；First diode D1 and the 3rd diode D3 series aiding connections；Second diode D2 and the 4th diode D4 series aiding connections；First
There is the first node connected with the first end of receiving coil between diode D1 and the 3rd diode D3；Second diode D2 and
There is the section point connected with the second end of receiving coil between 4th diode D4；First diode D1 and the second diode
The negative pole end of D2 is connected with filter module；The positive terminal ground connection of 3rd diode D3 and the 4th diode D4.
According to another aspect of the present invention, there is provided a kind of wireless charging frequency adjusting method, this method include：Disconnect and receiving
Coil and capacitance module, and measure the inductance value L of receiving coil；Receiving coil is connected with capacitance module, and breaking capacitance mould
Block and rectification module；
According toThe fixed capacity and tunable capacitor of capacitance module are adjusted, makes the equivalent capacity of capacitance module
It is worth for Ce；
Wherein, f is resonant frequency, is the predeterminated frequency or scope of circuit.
In accordance with a further aspect of the present invention, there is provided a kind of smart machine, including wireless charging receiving circuit, wireless charging connect
Receipts circuit is above-mentioned wireless charging receiving circuit.
Beneficial effects of the present invention：
Technique according to the invention scheme is big by adjusting fixed capacity and the capacitance of tunable capacitor in capacitance module
It is small, so as to change the resonant frequency of circuit so that circuit can work in preset frequency or scheduled frequency range, thus with nothing
The resonant frequency of micro USB electricity transmitting terminal circuit is mutually matched, and improves the efficiency of wireless charging.
Brief description of the drawings
Fig. 1 is the schematic diagram of the wireless charging receiving circuit of one embodiment of the invention；
Fig. 2 is the schematic diagram of the capacitance module of one embodiment of the invention；
Fig. 3 is the schematic diagram of the wireless charging receiving circuit of another embodiment of the present invention；
Fig. 4 is the circuit diagram of the wireless charging receiving circuit of one embodiment of the invention；
Fig. 5 is the flow chart of the wireless charging frequency adjusting method of one embodiment of the invention.
Embodiment
In order to solve the technical problem proposed in background technology, present inventor expects connecing by adjusting wireless charging
Capacitance size in the circuit of receiving end makes wireless charging receiving circuit be operated in predetermined frequency so as to change the working frequency of circuit
In rate or frequency range, the efficiency of wireless charging is improved.To make the object, technical solutions and advantages of the present invention clearer, under
Face will embodiment of the present invention is described further in detail with reference to attached drawing.
Embodiment one
Fig. 1 is the schematic diagram of the wireless charging receiving circuit of one embodiment of the invention, as shown in Figure 1, the wireless charging
Receiving circuit includes receiving coil 10, capacitance module 20 and rectification module 30.Receiving coil 10 is with certain inductance value
Coil, capacitance module 20 include at least one fixed capacity and a tunable capacitor, and receiving coil 10 and capacitance module 20 are connected
Form resonance circuit.Receiving coil 10 receives and to wireless charging receiving circuit input exchange signal；The capacitance of capacitance module 20
The size of value can change, and change the capacitance of circuit by adjusting the number of fixed capacity or the capacitance size of tunable capacitor
Value, so that the resonant frequency of adjustment circuit work makes wireless charging receiving circuit work humorous to predeterminated frequency or frequency range
The frequency of vibration frequency and transmitting terminal is consistent.The predeterminated frequency can be 6.78MHz, be wireless charging leagues dictate based on
The wireless charging system resonant frequency of magnetic resonance technology；Can also be using other customized frequencies of other environment.Adjustment
During can there are certain error so that the resonant frequency of circuit cannot reach accurate frequency values, therefore in the mistake of permission
In poor scope, the resonant frequency of circuit can be adjusted to predeterminated frequency scope.AC signal is changed defeated by rectification module 30
Go out direct current signal, charge a battery.
In the preferred solution of the present invention, as shown in Fig. 2, capacitance module 20 includes the first capacitance module 21 and the second capacitance
Module 22.Without successively smooth point, both functions and Principles of Regulation are for first capacitance module 21 and the second capacitance module 22
The same.The two can act synergistically, can also independent role, namely capacitance module 20 can only have the first capacitance module 21 or
Person only has the second capacitance module 22, can also be at the same time there are the first capacitance module 21 and the second capacitance module 22, according to circuit need
The scope for adjusting resonant frequency selects specific capacitance module quantity.First capacitance module 21 and the second capacitance module 22 all wrap
Include at least one tunable capacitor and at least one fixed capacity, and tunable capacitor and fixed capacity rear access wireless charging parallel with one another
Electric receiving circuit.Specifically, the first end of the first capacitance module 21 and receiving coil is connected in series, and the second capacitance module 22 is with connecing
The second end of take-up circle is connected in series.
In the preferred solution of the present invention, it is single that switch is additionally provided with the first capacitance module 21 and the second capacitance module 22
Member, the switch element and fixed capacity and tunable capacitor are parallel with one another.The switch element is controllable switch or Zero-ohm resistor,
For by corresponding capacitance module short circuit, preventing it from being adjusted to the resonant frequency of circuit.Namely when the first capacitance module
21 when working independently, and by 22 short circuit of the second capacitance module, 22 both ends of the second capacitance module is directly turned on；Otherwise the can also be made
Two capacitance modules 22 work independently.It should be noted that switch element at least one remain opening.If opened all
Unit is closed all to close, then all capacitance modules are shorted in circuit, and the capacitance in circuit can not work normally at this time,
Circuit is not just resonance circuit yet, i.e., cannot carry out normal charging work.Therefore, switch element at least one be opening state
State, circuit is the resonance circuit that coil and capacitance are composed in series at this time, can be normally carried out wireless charging function.
In one embodiment of the invention, as shown in figure 3, wireless charging receiving circuit further includes first switch module 40
With second switch module 50.First switch module 40 is connected in series between receiving coil 10 and capacitance module 20, for disconnecting
The connection of receiving coil 10 and capacitance module 20.Second switch module 50 be connected in series in capacitance module 20 and rectification module 30 it
Between, the connection for breaking capacitance module 20 and rectification module 30.First switch module 40 has two switch elements, sets respectively
At the both ends of receiving coil 10, i.e., a switch element is connected with the first end of receiving coil 10, another switch element is with connecing
The second end connection of take-up circle 10.First switch module 40 sets two switch elements, in the inductance value of measurement receiving coil 10
When, disconnect two switch elements, you can the connection of late-class circuit and receiving coil 10 is disconnected, avoids late-class circuit to inductance value
Measurement impact, ensure inductance value measurement accuracy.Second switch module 50 also has two switch elements, sets respectively
At 22 both ends of the first capacitance module 21 and the second capacitance module, i.e. a switch module is connected with the first capacitance module 21, another
A switch module is connected with the second capacitance module 22.Second switch module 50 sets two switch elements, in adjustment capacitance module
During 20 capacitance, two switch elements are disconnected, the connection of late-class circuit and capacitance module 20 can be disconnected, reduction adjusted
Disturbing influence in journey, improves the precision of adjustment.Before each charging, first switch module 40 is disconnected first, and measurement receives
The inductance value of coil 10.After inductance value measures, closure first switch module 40 simultaneously disconnects second switch module 50, according toAdjust the capacitance of capacitance module 20 so that the resonant frequency f of circuit is changed into predeterminated frequency or scope.Set
First switch module 40 and second switch module 50, can be with the connection of various pieces in disconnecting circuit, the convenient survey for carrying out circuit
Amount and adjusting work.Preferably, first switch module 40 and second switch module 50 are controllable switch or zero ohms circuit, can
In order to the disconnection and connection of circuit.
In one embodiment of the invention, rectification module 30 includes the bridge modules and capacitance group of a diode composition
Into filter module.Bridge modules include at least four diode, and filter module includes at least one capacitance and bridge modules are exported
Signal be filtered.The input terminal of bridge modules connects the first end and second end of receiving coil 10 respectively, bridge modules
Output terminal connects the input terminal of filter module.The AC signal that bridge modules export receiving coil 10 carries out rectifying conversion, defeated
Go out direct current signal；The capacitance of filter module is filtered the direct current signal, reduces the pulse repetition of direct current signal, makes output electric
Crimping is bordering on comparatively ideal direct current.Preferably, bridge modules include the first diode D1, the second diode D2, the three or two pole
Pipe D3 and the 4th diode D4.First diode D1 and the 3rd diode D3 series aiding connections；Second diode D2 and the four or two pole
Pipe D4 series aiding connections；There is the first segment connected with the first end of receiving coil between first diode D1 and the 3rd diode D3
Point；There is the section point connected with the second end of receiving coil between second diode D2 and the 4th diode D4；One or two
The negative pole end of pole pipe D1 and the second diode D2 are connected with filter module；The positive terminal of 3rd diode D3 and the 4th diode D4
Ground connection.
Embodiment two
Fig. 4 is the wireless charging receiving circuit figure of one embodiment of the invention, as shown in figure 4, including in receiving coil 10
The first switch module 40 of coil L1, coil L1 both ends connection includes Zero-ohm resistor R1 and Zero-ohm resistor R2, coil L1's
First end connects Zero-ohm resistor R1, the second end connection Zero-ohm resistor R2 of coil L1.The other end of Zero-ohm resistor R1 connects
The first capacitance module 21 is connect, the other end of Zero-ohm resistor R2 connects the second capacitance module 22.In the inductance value of measuring coil L1
When, Zero-ohm resistor R1 and Zero-ohm resistor R2 is disconnected, measures coil L1's in the case where coil L1 influences from circuit
Inductance value, reduces the error of measurement result.
First capacitance module 21 includes the first capacitance C1, the second capacitance C2, the 3rd capacitance C3 and the 4th capacitance C4, Yi Jike
Adjust capacitance CL1.Wherein the first capacitance C1, the second capacitance C2, the 3rd capacitance C3 and the 4th capacitance C4 are fixed capacity, its capacitance
Immutable, tunable capacitor CL1 is the adjustable tunable capacitor of size of capacitance.On the first capacitance module 21, also set
The switch element parallel with one another with fixed capacity and tunable capacitor is equipped with, which is Zero-ohm resistor R4.Work as zero ohms
When resistance R4 is disconnected, the first capacitance module 21 connects in circuit, and the capacitance of circuit is adjusted；As Zero-ohm resistor R4
During connection, the first capacitance module 21 is short-circuited, can not adjustment circuit capacitance.
Similarly, the second capacitance module 22 includes the 5th capacitance C5, the 6th capacitance C6, the 7th capacitance C7 and the 8th capacitance
C8, and tunable capacitor CL2.Wherein the 5th capacitance C5, the 6th capacitance C6, the 7th capacitance C7 and the 8th capacitance C8 are fixed electricity
Hold, its capacitance is immutable, and tunable capacitor CL2 is the adjustable tunable capacitor of size of capacitance.In the second capacitance mould
On block 22, the switch element parallel with one another with fixed capacity and tunable capacitor is additionally provided with, which is Zero-ohm resistor
R3.When Zero-ohm resistor R3 is disconnected, the second capacitance module 22 connects in circuit, and the capacitance of circuit is adjusted；When
During Zero-ohm resistor R3 connections, the second capacitance module 22 is short-circuited, can not adjustment circuit capacitance.
Second switch module 50 is arranged on the other end of capacitance module, including Zero-ohm resistor R5 and Zero-ohm resistor R6.
Zero-ohm resistor R5 is connected with the first capacitance module 21, and Zero-ohm resistor R6 is connected with the second capacitance module 22.Measuring coil
, it is necessary to adjust the capacitance of capacitance module 20 after the inductance value of L1, Zero-ohm resistor R5 and Zero-ohm resistor R6 is disconnected at this time, is kept away
Exempt from circuit during adjusting to have an impact capacitance module 20 and coil L1, improve the precision of adjusting.Due to the electricity of coil L1
Inductance value has measured, and the resonant frequency of wireless charging receiving circuit is predeterminated frequency, according to resonance equationMeter
The theoretical capacitance for obtaining circuit is calculated, then the capacitance of adjusting capacitance module to theoretical capacitance.Specifically, according to circuit
Application environment, can access the first capacitance module 21 and the second capacitance module 22 in circuit, or can only access first
21 or second capacitance module 22 of capacitance module, then adjusts tunable capacitor CL1 or tunable capacitor CL2, make the capacitance of circuit without
The close theoretical capacitance of limit.Zero-ohm resistor R4 and Zero-ohm resistor R3 is disconnected, at this time the first capacitance module 21 and the second capacitance
Module 22 is accessed in circuit, make the capacitance of fixed capacity close to theoretical capacitance, then using tunable capacitor CL1 and
CL2 is finely adjusted the capacitance of circuit, makes the capacitance infinite approach theory capacitance of circuit.When the capacitance of circuit is reason
During by capacitance, the resonant frequency of circuit can reach predeterminated frequency.
The other end connection rectification module 30 of second switch module, rectification module 30 include bridge modules 31 and filter module
32.Bridge modules include the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4.One or two pole
Pipe D1 and the 3rd diode D3 series aiding connections；Second diode D2 and the 4th diode D4 series aiding connections；First diode D1 with
There is the first node connected with the first end of receiving coil between 3rd diode D3；Second diode D2 and the 4th diode
There is the section point connected with the second end of receiving coil between D4；The negative pole end of first diode D1 and the second diode D2
It is connected with filter module；The positive terminal ground connection of 3rd diode D3 and the 4th diode D4.The AC signal warp of coil L1 outputs
Bridge modules 31 are crossed, can be rectified and be transformed to direct current signal.
Rectification module 32 includes the 9th capacitance C9, the tenth capacitance C10, the 11st capacitance C11, the 12nd capacitance C12 and the
13 capacitance C13, and zener diode Z1.9th capacitance C9, the tenth capacitance C10, the 11st capacitance C11, the 12nd capacitance
C12 and the 13rd capacitance C13, and zener diode Z1 are parallel with one another.32 input terminal of rectification module is defeated with bridge modules 31
Outlet connects, output terminal connection storage batteries D C-DC.The direct current signal pulse repetition exported by 31 rectification of bridge modules is larger,
Set filter module to be filtered the direct current signal, the output voltage of circuit is approached and comparatively ideal direct current.
The present invention provides a kind of wireless charging frequency adjusting method, and with reference to shown in Fig. 4 and Fig. 5, this method includes as follows
Step：
Step S10, disconnects the connection of receiving coil 10 and capacitance module 20, and measures the inductance value L of receiving coil 10.
Specifically, the Zero-ohm resistor R1 and Zero-ohm resistor R2 of first switch module 40 are disconnected, receiving coil 10 and electricity
Connection between molar block 20 disconnects therewith.The inductance value L of receiving coil 10 is measured at this time, and specific measurement method can use
Measurement method of the prior art, details are not described herein again.Receiving coil 10 is in the fabrication process because material or coiling work
The difference of skill, the coil inductance of final output also have certain difference.Therefore, it is necessary to measure the actual electricity of receiving coil 10
Inductance value, determines the parameters of circuit, to ensure the reliability of circuit based on this.
Step S20, connects receiving coil and capacitance module, and the connection of breaking capacitance module and rectification module.Namely step
After rapid S10 measurements, first switch module 40 is re-closed, and disconnect the Zero-ohm resistor R5 and zero of second switch module 50
Ohmic resistance R6, at this time receiving coil 10 reconnected with capacitance module 20, capacitance module 20 is disconnected with rectification module 30, the step
Suddenly capacitance module 20 or receiving coil 10 can be had an impact to avoid circuit during being adjusted in capacitance.
Step S30, adjusts the capacitance of capacitance module, the equivalent capacity of capacitance module is equal to Ce.
When carrying out wireless charging, circuit needs to work in resonant frequency.The resonant frequency is set in advance
Frequency or default frequency range, according to resonance equationUnderstand, after the inductance value L of circuit is determined, it is only necessary to
Capacitance value Ce, you can change the resonant frequency of circuit.Circuit is calculated according to resonance equation and reaches resonant frequency needs
Capacitance Ce, then adjusts the number of 20 fixed capacity of capacitance module and the size of tunable capacitor, makes the equivalent of capacitance module 20
Capacitance is equal or close to Ce.
Present invention also offers a kind of smart machine, the smart machine include above-described embodiment in any embodiment it is wireless
Charge receiving circuit, it is possible to achieve efficient wireless charging, saves the charging interval.Smart machine can be mobile phone, intelligent hand
The equipment of the needs such as table, electric toothbrush or tablet computer charging.
In conclusion the wireless charging circuit that uses of the present invention can change the humorous of circuit by adjusting the capacitance of circuit
Vibration frequency, makes circuit be operated in predetermined frequency or frequency range, improves the efficiency of wireless charging.It is also provided with out in circuit
Module is closed, when measuring the inductance value of receiving coil or adjusting the capacitance of circuit, disconnects receiving coil or capacitance module and electricity
The connection on road, avoids the other parts of circuit from impacting measurement result or adjusting process, improves the precision of measurement, reduce and miss
Difference, ensures the reliability of circuit.
The above description is merely a specific embodiment, under the above-mentioned teaching of the present invention, those skilled in the art
Other improvement or deformation can be carried out on the basis of above-described embodiment.It will be understood by those skilled in the art that above-mentioned tool
The purpose of the present invention is simply preferably explained in body description, and protection scope of the present invention should be subject to scope of the claims.
Claims (10)
1. a kind of wireless charging receiving circuit, it is characterised in that the circuit includes receiving coil including at least one adjustable electric
Hold the capacitance module and rectification module with least one fixed capacity；The receiving coil receives input exchange signal, described
Capacitance module adjusts the frequency of the circuit to predeterminated frequency or scope, and the AC signal is exported by the rectification module is
Direct current signal；The receiving coil, capacitance module and rectification module are sequentially connected in series.
2. circuit according to claim 1, it is characterised in that the capacitance module includes the first capacitance module, and described
One capacitance module includes at least one tunable capacitor and at least one fixed capacity, the tunable capacitor and the fixed capacity phase
Mutually after parallel connection, it is connected in series with the first end of the receiving coil.
3. circuit according to claim 1 or 2, it is characterised in that the capacitance module further includes the second capacitance module, institute
Stating the second capacitance module includes at least one tunable capacitor and at least one fixed capacity, the tunable capacitor and the fixed electricity
Hold it is parallel with one another after, be connected in series with the second end of the receiving coil.
4. circuit according to claim 3, it is characterised in that the capacitance module further includes and the fixed capacity and institute
State tunable capacitor switch element parallel with one another.
5. circuit according to claim 1, it is characterised in that the circuit further includes first switch module and second switch
Module；
The first switch block coupled in series is connected between the receiving coil and the capacitance module, for disconnecting or connecting institute
State receiving coil and the capacitance module；
The second switch block coupled in series is connected between the capacitance module and the rectification module, for disconnecting or connecting institute
State capacitance module and the rectification module.
6. circuit according to claim 5, it is characterised in that
The first switch module is controllable switch or Zero-ohm resistor；
The second switch module is controllable switch or Zero-ohm resistor.
7. circuit according to claim 1, it is characterised in that the rectification module includes bridge modules and including at least one
The filter module of a capacitance, the AC signal that the capacitance module exports is converted to direct current signal by the bridge modules, described
Direct current signal is exported to storage battery through the filter module.
8. circuit according to claim 7, it is characterised in that the bridge modules include the first diode D1, the two or two
Pole pipe D2, the 3rd diode D3 and the 4th diode D4；
The first diode D1 and the 3rd diode D3 series aiding connections；
The second diode D2 and the 4th diode D4 series aiding connections；
There is the connected with the first end of the receiving coil between the first diode D1 and the 3rd diode D3
One node；
There is the connected with the second end of the receiving coil between the second diode D2 and the 4th diode D4
Two nodes；
The negative pole end of the first diode D1 and the second diode D2 are connected with the filter module；
The positive terminal ground connection of the 3rd diode D3 and the 4th diode D4.
A kind of 9. wireless charging frequency adjusting method, it is characterised in that the described method includes：
Receiving coil and capacitance module are disconnected, and measures the inductance value L of the receiving coil；
The receiving coil is connected with the capacitance module, and disconnects the capacitance module and rectification module；
According toThe fixed capacity and tunable capacitor of the capacitance module are adjusted, makes the equivalent of the capacitance module
Capacitance is Ce；
Wherein, f is resonant frequency, is the predeterminated frequency or scope of the circuit.
10. a kind of smart machine, including wireless charging receiving circuit, it is characterised in that the wireless charging receiving circuit is power
Profit requires the wireless charging receiving circuit any one of 1 to 8.
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| CN201711224616.7A CN107959357A (en) | 2017-11-29 | 2017-11-29 | A kind of wireless charging receiving circuit, frequency adjusting method and smart machine |
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| CN201711224616.7A CN107959357A (en) | 2017-11-29 | 2017-11-29 | A kind of wireless charging receiving circuit, frequency adjusting method and smart machine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108683271A (en) * | 2018-06-08 | 2018-10-19 | 深圳市汇森无线传输有限公司 | A kind of wireless charging system |
| CN109617255A (en) * | 2018-12-26 | 2019-04-12 | 北京酷能科技有限公司 | Wireless charging receives circuit |
| CN112350456A (en) * | 2020-09-25 | 2021-02-09 | 广州市网优优信息技术开发有限公司 | Intelligent wireless charging circuit and system |
| CN114123436A (en) * | 2022-01-25 | 2022-03-01 | 合肥有感科技有限责任公司 | Inductance deviation self-adaptive wireless charging method |
| CN114661090A (en) * | 2022-05-19 | 2022-06-24 | 深之蓝(天津)水下智能科技有限公司 | Method and system for self-adaptively acquiring matching capacitance value |
| WO2023046121A1 (en) * | 2021-09-24 | 2023-03-30 | 武汉联影生命科学仪器有限公司 | Tuning device for receiving coil, low-temperature probe, and magnetic resonance device |
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| CN103595262A (en) * | 2013-11-04 | 2014-02-19 | 江苏科意达机械有限公司 | Frequency adjusting circuit for wireless charging system |
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| WO2023046121A1 (en) * | 2021-09-24 | 2023-03-30 | 武汉联影生命科学仪器有限公司 | Tuning device for receiving coil, low-temperature probe, and magnetic resonance device |
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| CN114661090A (en) * | 2022-05-19 | 2022-06-24 | 深之蓝(天津)水下智能科技有限公司 | Method and system for self-adaptively acquiring matching capacitance value |
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