CN205921462U - Limitation control circuit and device - Google Patents
Limitation control circuit and device Download PDFInfo
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- CN205921462U CN205921462U CN201620841267.8U CN201620841267U CN205921462U CN 205921462 U CN205921462 U CN 205921462U CN 201620841267 U CN201620841267 U CN 201620841267U CN 205921462 U CN205921462 U CN 205921462U
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Abstract
The utility model provides a limitation control circuit and device, the circuit includes: driven resonance loop and half control electric capacity, driven resonance loop includes resonance inductor and resonant capacitor, the resonance inductor with resonant capacitor establishes ties, half control electric capacity includes: electric capacity and switch tube, the one end of electric capacity with the source connection of switch tube, the other end of electric capacity with resonant capacitor does not connect the one end of resonance inductor and connects, the drain electrode of switch tube with the resonance inductor resonant capacitor's tie point is connected. When needs provide stable voltage or electric current, control the switch tube switches on, and then control half control electric capacity switches on, half control electric capacity destroys resonance inductor and resonant capacitor's resonant condition, can provide stable voltage or electric current, has solved the unstable problem of driven resonance loop work.
Description
Technical field
This utility model is related to wireless power field, more particularly, it relates to a kind of amplitude limit control circuit and device.
Background technology
Driven resonant ring has the double grading accepting energy and emitted energy, in the terminal of wireless power, from dynamic resonance
Ring Chang Dangzuo receives resonant ring and uses, and is that terminal appliance is powered.
Because driven resonant ring works in resonant condition, the voltage and current amplitude in resonant ring is very big, and unstable,
If powered directly to terminal appliance, huge electric current and voltage pulsation can be produced, serious impact can be brought to terminal appliance,
Even electrical equipment can be burnt.Therefore, need a kind of amplitude controlling driven resonance loop voltag or electric current badly it is ensured that driven resonant ring works
Stable circuit.
Utility model content
For solving above-mentioned technical problem, this utility model provides a kind of amplitude limit control circuit and device, driven humorous to solve
Shake the problem of ring job insecurity.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of amplitude limit control circuit, described circuit includes:
Driven resonant ring and half control electric capacity；
Described driven resonant ring includes resonance coil and resonant capacitance, and described resonance coil is connected with described resonant capacitance；
Described half control electric capacity includes: electric capacity and switching tube；
One end of described electric capacity is connected with the source electrode of described switching tube；The other end of described electric capacity is with described resonant capacitance not
The one end connecting resonance coil connects；The drain electrode of described switching tube is connected with the junction point of described resonance coil, described resonant capacitance
Connect.
Preferably, described switching tube is managed for igbt.
Preferably, described switching tube is managed for mosfet.
A kind of amplitude limit control device, described device includes amplitude limit control circuit and drive voltage supply circuit；
Described amplitude limit control circuit includes:
Driven resonant ring and half control electric capacity；
Described driven resonant ring includes resonance coil and resonant capacitance, and described resonance coil is connected with described resonant capacitance；
Described half control electric capacity includes: electric capacity and switching tube；
One end of described electric capacity is connected with the source electrode of described switching tube；The other end of described electric capacity is with described resonant capacitance not
The one end connecting resonance coil connects；The drain electrode of described switching tube is connected with the junction point of described resonance coil, described resonant capacitance
Connect；
Described drive voltage supply circuit, for providing voltage for described half control electric capacity；
Described drive voltage supply circuit includes:
Commutator, filter capacitor, isolating switch power, voltage sampling circuit, comparator and driving amplifier；
One end of the non-described junction point of resonance coil, described commutator, described filter capacitor, institute in described driven resonant ring
State voltage sampling circuit, described comparator, described driving amplifier and described half control electric capacity to be sequentially connected, described keep apart powered-down
Source is connected in parallel on the two ends of filter capacitor.
Preferably, described switching tube is managed for igbt.
Preferably, described switching tube is managed for mosfet.
From technique scheme as can be seen that provided by the utility model
This utility model provides a kind of amplitude limit control circuit and device, and described circuit includes: driven resonant ring and half control
Electric capacity；Described driven resonant ring includes resonance coil and resonant capacitance, and described resonance coil is connected with described resonant capacitance；Described
Half control electric capacity includes: electric capacity and switching tube；One end of described electric capacity is connected with the source electrode of described switching tube；Described electric capacity another
The one end being not connected with resonance coil with described resonant capacitance is held to be connected；The drain electrode of described switching tube and described resonance coil, described
The junction point of resonant capacitance connects.When needing to provide stable voltage or electric current, control described switching tube conducting, and then control
Described half control capacitors conductive, described half control electric capacity destroys the resonant condition of resonance coil and resonant capacitance, using the teaching of the invention it is possible to provide stable
Voltage or electric current, solve the problems, such as driven resonant ring job insecurity.
Brief description
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing providing.
The circuit diagram of the amplitude limit control circuit that Fig. 1 provides for this utility model embodiment one；
The circuit diagram of the amplitude limit control circuit that Fig. 2 provides for this utility model embodiment two；
The circuit diagram of the amplitude limit control device that Fig. 3 provides for this utility model embodiment three.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely description is it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of making creative work
The every other embodiment being obtained, broadly falls into the scope of this utility model protection.
This utility model provides a kind of amplitude limit control circuit it is characterised in that described circuit includes:
Driven resonant ring and half control electric capacity；
Described driven resonant ring includes resonance coil and resonant capacitance, and described resonance coil is connected with described resonant capacitance；
Described half control electric capacity includes: electric capacity and switching tube；
One end of described electric capacity is connected with the source electrode of described switching tube；The other end of described electric capacity is with described resonant capacitance not
The one end connecting resonance coil connects；The drain electrode of described switching tube is connected with the junction point of described resonance coil, described resonant capacitance
Connect.
Optionally, in another embodiment of the present utility model, described switching tube is managed for insulated gate bipolar transistor igbt；
Optionally, in another embodiment of the present utility model, described switching tube is that Metal-Oxide Semiconductor field effect is brilliant
Body pipe mosfet manages.
With reference to Fig. 1, Fig. 1 is resonance coil and resonance capacitances in series, switching tube are the situation of mosfet pipe.
Wherein, l1 is resonance coil, and c1 is resonant capacitance, and l1, c1 are composed in series a driven resonant ring, electric capacity c2 with
Mosfet pipe 101 is composed in series a half control electric capacity, and half control electric capacity is in parallel with resonant capacitance c1, goes here and there with resonance coil l1 simultaneously
Connection, a, b are outfans, and arrow represents magnetic field.When the grid of mosfet pipe 101 is high level, mosfet pipe 101 turns on, by
In the internal resistance very little of mosfet pipe 101, close to 0, at this moment, be equivalent to that electric capacity c2 is in parallel with resonant capacitance c1, driven resonant ring
Optimum resonant state is destroyed, and amplitude declines even complete failure of oscillation；When grid is for low level, mosfet pipe 101 ends, due to
Mosfet pipe 101 is opened a way, and electric capacity c2 is invalid.
With reference to Fig. 2, Fig. 2 is resonance coil and resonance capacitances in series, switching tube are the situation of igbt pipe.
Wherein, l1 is resonance coil, and c1 is resonant capacitance, and l1, c1 are composed in series a driven resonant ring, electric capacity c2 with
Igbt pipe 102 is composed in series a half control electric capacity, and half control electric capacity is in parallel with resonant capacitance c1, connects with resonance coil l1 simultaneously,
A, b are outfans, and arrow represents magnetic field.Specific work process, with the corresponding explanation of Fig. 1, will not be described here.
Present embodiments provide a kind of amplitude limit control circuit, when needing to provide stable voltage or electric current, control described
Switching tube turns on, and then controls described half control capacitors conductive, and described half control electric capacity destroys the resonance of resonance coil and resonant capacitance
State, using the teaching of the invention it is possible to provide stable voltage or electric current, solves the problems, such as driven resonant ring job insecurity.
Optionally, provide a kind of amplitude limit control device in another embodiment of the present utility model, described device includes limiting
Width control circuit and drive voltage supply circuit；
Described amplitude limit control circuit includes:
Driven resonant ring and half control electric capacity；
Described driven resonant ring includes resonance coil and resonant capacitance, and described resonance coil is connected with described resonant capacitance；
Described half control electric capacity includes: electric capacity and switching tube；
One end of described electric capacity is connected with the source electrode of described switching tube；The other end of described electric capacity is with described resonant capacitance not
The one end connecting resonance coil connects；The drain electrode of described switching tube is connected with the junction point of described resonance coil, described resonant capacitance
Connect；
Described drive voltage supply circuit, for providing voltage for described half control electric capacity；
Described drive voltage supply circuit includes:
Commutator, filter capacitor, isolating switch power, voltage sampling circuit, comparator and driving amplifier；
One end of the non-described junction point of resonance coil, described commutator, described filter capacitor, institute in described driven resonant ring
State voltage sampling circuit, described comparator, described driving amplifier and described half control electric capacity to be sequentially connected, described keep apart powered-down
Source is connected in parallel on the two ends of filter capacitor.
Optionally, in another embodiment of the present utility model, described switching tube is managed for igbt.
Optionally, in another embodiment of the present utility model, described switching tube is managed for mosfet.
The circuit diagram of amplitude limit control device is with reference to Fig. 3.Specifically, resonant capacitance c1 and resonance coil l1 is composed in series one
Driven resonant ring, 103 is commutator, and c3 is filter capacitor, and 104 is isolating switch power, and resistance r1 and r2 is composed in series voltage
Sample circuit, 105 is comparator, and 106 is driving amplifier, and electric capacity c2 and mosfet pipe 101 form half control electric capacity, and vd represents defeated
Go out voltage, vreg is reference voltage.
Driven resonant ring, the circuit diagram of half control electric capacity are introduced in the above-described embodiments, refer to above-mentioned enforcement
Example, will not be described here.The work process of drive voltage supply circuit is as follows:
Mosfet pipe and igbt pipe are all voltage-controlled devices, need to provide a suitable driving voltage just for their grid
After energy normal work, the rectified device of outfan 103 rectification of driven resonant ring and filter capacitor c3 filtering, obtain a high straightening
Stream electricity, isolating switch power 104 inputs a Switching Power Supply, high voltage direct current is carried out voltage conversion, obtains switching tube grid
Required DC voltage, generally between 10v-18v, high direct voltage carries out voltage through the voltage sampling circuit that r1 and r2 forms
Sampling, is then delivered to comparator 105 and carries out voltage-contrast, if detection voltage exceedes setting voltage, comparator 105 exports high electricity
Flat, this high level carries out delivering to the grid of switching tube after Current amplifier through driving amplifier 106 again, at this moment switching tube conducting,
Effectively, the complete resonance of driven resonant ring is destroyed half control electric capacity, and then can provide stable voltage or electric current.
It should be noted that described switching tube conducting can be controlled in the way of using input low and high level or adopt pulse width
The mode of degree modulation controls described switching tube conducting.
When controlling described switching tube conducting by the way of inputting low and high level, with reference to Fig. 3, specific work process is such as
Under:
When the mid-point voltage of voltage sampling circuit, when that is, the voltage between resistance r1 and r2 exceedes reference voltage vreg, than
Export high level compared with device 105, at this moment the audion q1 conducting in driving amplifier 106, q2 ends, and voltage is from isolating switch power
104 vd, through q1 and r3, is added on the grid of mosfet pipe 101,101 conductings, is at this moment equivalent to electric capacity c2 and resonant capacitance
C1 is in parallel, and the capacity of resonance changes, and optimum resonant state originally is changed, and amplitude reduces even failure of oscillation, therefore, resonance coil
The voltage at two ends reduces, and the voltage on rectification post filtering electric capacity c3 declines；When voltage sampling circuit mid-point voltage is less than with reference to electricity
During pressure vreg, comparator 105 exports low level, the audion q1 cut-off in driving amplifier 106, and q2 turns on, mosfet pipe 101
Grid be low level, 101 cut-offs, electric capacity c2 is invalid, and driven resonant ring maintains original optimum resonant state, resonance coil two
The voltage at end raises, and the voltage on rectification post filtering electric capacity c3 raises；So circulate, result is the voltage dimension on filter capacitor c3
Hold in a metastable value, thus having reached the purpose of guarantee driven resonant ring working stability.
When controlling described switching tube conducting by the way of pulse width modulation, see figures.1.and.2, specific work process
As follows:
There is provided a pulse width modulating signal to the grid of switching tube, at this moment, the half control that electric capacity c2 is formed with switching tube
Electric capacity has reformed into a variable capacitance being controlled by pulse width modulation, after this variable capacitance is in parallel with resonant capacitance c1,
Also the resonant condition of driven resonant ring can be destroyed, so, the amplitude of driven resonant ring is directly controlled by pulse width modulation,
Thus providing suitable output voltage for terminal electrical appliance.
It should be noted that because half control electric capacity is that electric capacity c2 is connected with switching tube formation, switching tube at work
End must connect " ", this is the potential minimum reference point of a circuit, is not real ground, select " " be for the ease of
Controlling switch pipe works effectively.In the driven resonant ring of series connection, resonance coil l1 is public with resonant capacitance c1 only one of which
Midpoint, select this midpoint as " ".
In the present embodiment, by arranging drive voltage supply circuit, suitable voltage can be provided to half control electric capacity, and then
The resonant condition changed from dynamic resonance can be destroyed by the break-make of half control electric capacity.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or new using this practicality
Type.Multiple modifications to these embodiments will be apparent from for those skilled in the art, is determined herein
The General Principle of justice can be realized in the case of without departing from spirit or scope of the present utility model in other embodiments.Cause
This, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The wide scope consistent with features of novelty.
Claims (6)
1. a kind of amplitude limit control circuit is it is characterised in that described circuit includes:
Driven resonant ring and half control electric capacity；
Described driven resonant ring includes resonance coil and resonant capacitance, and described resonance coil is connected with described resonant capacitance；
Described half control electric capacity includes: electric capacity and switching tube；
One end of described electric capacity is connected with the source electrode of described switching tube；The other end of described electric capacity is not connected with described resonant capacitance
One end of resonance coil connects；The drain electrode of described switching tube is connected with the junction point of described resonance coil, described resonant capacitance.
2. circuit according to claim 1 is it is characterised in that described switching tube is managed for igbt.
3. circuit according to claim 1 is it is characterised in that described switching tube is managed for mosfet.
4. a kind of amplitude limit control device is it is characterised in that described device includes amplitude limit control circuit and drive voltage supply circuit；
Described amplitude limit control circuit includes:
Driven resonant ring and half control electric capacity；
Described driven resonant ring includes resonance coil and resonant capacitance, and described resonance coil is connected with described resonant capacitance；
Described half control electric capacity includes: electric capacity and switching tube；
One end of described electric capacity is connected with the source electrode of described switching tube；The other end of described electric capacity is not connected with described resonant capacitance
One end of resonance coil connects；The drain electrode of described switching tube is connected with the junction point of described resonance coil, described resonant capacitance；
Described drive voltage supply circuit, for providing voltage for described half control electric capacity；
Described drive voltage supply circuit includes:
Commutator, filter capacitor, isolating switch power, voltage sampling circuit, comparator and driving amplifier；
One end of the non-described junction point of resonance coil, described commutator, described filter capacitor, described electricity in described driven resonant ring
Pressure sample circuit, described comparator, described driving amplifier and described half control electric capacity are sequentially connected, and described isolating switch power is simultaneously
It is associated in the two ends of filter capacitor.
5. device according to claim 4 is it is characterised in that described switching tube is managed for igbt.
6. device according to claim 4 is it is characterised in that described switching tube is managed for mosfet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620841267.8U CN205921462U (en) | 2016-08-04 | 2016-08-04 | Limitation control circuit and device |
| PCT/CN2016/102563 WO2018023882A1 (en) | 2016-08-04 | 2016-10-19 | Amplitude limit control circuit, device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620841267.8U CN205921462U (en) | 2016-08-04 | 2016-08-04 | Limitation control circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205921462U true CN205921462U (en) | 2017-02-01 |
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ID=57870122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620841267.8U Active CN205921462U (en) | 2016-08-04 | 2016-08-04 | Limitation control circuit and device |
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| Country | Link |
|---|---|
| CN (1) | CN205921462U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253494A (en) * | 2016-08-04 | 2016-12-21 | 中惠创智无线供电技术有限公司 | A kind of amplitude limit control circuit, device and method |
-
2016
- 2016-08-04 CN CN201620841267.8U patent/CN205921462U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253494A (en) * | 2016-08-04 | 2016-12-21 | 中惠创智无线供电技术有限公司 | A kind of amplitude limit control circuit, device and method |
| CN106253494B (en) * | 2016-08-04 | 2019-06-21 | 中惠创智无线供电技术有限公司 | A kind of clipping control circuit, device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210323 Address after: 518000 room 133-134, No.1 International Students (Longgang) Pioneer Park, Longcheng street, Longgang District, Shenzhen City, Guangdong Province Patentee after: ZONECHARGE (SHENZHEN) WIRELESS POWER SUPPLY TECHNOLOGY Co.,Ltd. Address before: 264003 Mingda West Road, Laishan District, Yantai, Shandong Province, No. 11 Patentee before: ZHONG HUI POWERISE WIRELESS POWER TECHNOLOGY Ltd. |
|
| TR01 | Transfer of patent right |