CN205921460U - Limitation control circuit - Google Patents
Limitation control circuit Download PDFInfo
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- CN205921460U CN205921460U CN201620840735.XU CN201620840735U CN205921460U CN 205921460 U CN205921460 U CN 205921460U CN 201620840735 U CN201620840735 U CN 201620840735U CN 205921460 U CN205921460 U CN 205921460U
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- switch
- circuit
- votage control
- control switch
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Abstract
The utility model provides a limitation control circuit, the circuit includes: resonance inductor, resonant capacitor, switch and transformer, the secondary coil of transformer with the switch series connection the resonance inductor with constitute first circuit after the primary series connection of transformer, first circuit with parallelly connected or the series connection of resonant capacitor. When needs provide stable voltage, control the switch conduction, the secondary coil of transformer is by the short circuit, and then the primary's of transformer inductance value reduces, and the inductance value of circuit changes, therefore resonant condition is changed, 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, in particular, is related to a kind of amplitude limit control circuit.
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 working stability
Circuit.
Utility model content
For solving above-mentioned technical problem, this utility model provides a kind of amplitude limit control circuit.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of amplitude limit control circuit, comprising:
Resonance coil, resonant capacitance, switch and transformator；
The secondary coil of described transformator connect with described switch, the primary coil of described resonance coil and described transformator
The first circuit is formed, described first circuit is with described resonant capacitance in parallel or in series after series connection.
Preferably, described switch as votage control switch；
Wherein, two switch terminals of described votage control switch are connected with the secondary coil of described transformator.
Preferably, described votage control switch is managed for igbt, and the collector and emitter of described igbt pipe is two switch terminals.
Preferably, described votage control switch is managed for mosfet, and the drain electrode of described mosfet pipe and source electrode are two switch terminals.
Preferably, described votage control switch is managed for triac, and main electrode t1 of described triac pipe and main electrode t2 are opened for two
Guan Duan.
Preferably, described votage control switch is two igbt pipe differential concatenations, after described two igbt pipe differential concatenations
Extremely two switch terminals of two current collections.
Preferably, described votage control switch be two mosfet pipe differential concatenations, described two mosfet pipe differential concatenations it
Two afterwards drain as two switch terminals.
Preferably, described votage control switch is two triac pipe differential concatenations, after described two triac pipe differential concatenations
Two main electrodes t2 be two switch terminals.
From technique scheme as can be seen that this utility model provides a kind of amplitude limit control circuit, described circuit includes:
Resonance coil, resonant capacitance, switch and transformator；The secondary coil of described transformator is connected with described switch, described resonance line
Circle connect with the primary coil of described transformator after form the first circuit, described first circuit in parallel with described resonant capacitance or
Series connection.When needing to provide stable voltage, control described switch conduction, the secondary coil of described transformator is shorted, and then
The inductance value of the primary coil of described transformator reduces, and the inductance value of circuit changes, and therefore resonant condition is changed, 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.
Fig. 1 is the structural representation of series resonance ring and parallel resonance ring in this utility model；
Fig. 2 is the structural representation of three end votage control switches in this utility model；
Fig. 3 is the structural representation of four end votage control switches in this utility model；
Fig. 4 is the structural representation of the resonant ring applying three end votage control switches in this utility model；
Fig. 5 is the structural representation of the resonant ring applying four end votage control switches in this utility model.
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, comprising:
Resonance coil, resonant capacitance, switch and transformator；
The secondary coil of described transformator connect with described switch, the primary coil of described resonance coil and described transformator
The first circuit is formed, described first circuit is with described resonant capacitance in parallel or in series after series connection.
With reference to Fig. 1, the in figure in left side in Fig. 1, a, b represent two outfans of series resonance ring, and arrow represents magnetic field side
To k represents switch, and c1 represents resonant capacitance, and l1 represents resonance coil, the primary coil of l2 indication transformer, and l3 represents transformation
The secondary coil of device.The secondary coil l3 of described transformator is connected with described switch k, described resonance coil l1 and described transformator
Primary coil l2 series connection after form the first circuit, described first circuit is connected with described resonant capacitance.
The in figure on right side in Fig. 1, a, b represent two outfans of parallel resonance ring, and arrow represents magnetic direction, and k represents
Switch, c1 represents resonant capacitance, and l1 represents resonance coil, the primary coil of l2 indication transformer, the secondary of l3 indication transformer
Coil.The secondary coil l3 of described transformator is connected with described switch k, the primary line of described resonance coil l1 and described transformator
The first circuit is formed, described first circuit is in parallel with described resonant capacitance after circle l2 series connection.
When switching k open circuit, the secondary coil l3 of transformator is inoperative, at this moment, is equivalent to resonance coil l1 and transformation
Device primary coil l2 connects, and the inductance value after series connection can be calculated as follows:
Lt=l1+l2
In formula, lt is total inductance amount, and l1 is the inductance value of resonance coil, and l2 is the inductance value of the primary coil of transformator, string
After connection, lt is more than l1, also greater than l2；
Relational expression according to resonant frequency:The resonant frequency of resonant ring becomes anti-with the square root of lc
Than, here, l=lt=(l1+l2), c=c1.
When switching k connection, the resistance of itself is zero or close to zero, at this moment, is equivalent to the secondary coil l3 of transformator
Short circuit, forms a magnetic short-circuited conducting sleeve, leads to the inductance value of the primary coil l2 of transformator to reduce, the original resonant condition of system
Destroyed, amplitude respective change, output voltage is just different.
In Fig. 1, the work process of each element is:
After the secondary coil l3 tandem tap k of transformator, the primary coil l2 of transformator has reformed into a variable coil,
The inductance value of primary coil l2 will be different with cut-offfing of k of switch.When switching k conducting, the internal resistance of switch k is zero or connects
It is bordering on zero, at this moment, the secondary coil l3 of transformator is shorted, form a short-circuited conducting sleeve, the core reluctance of transformator will significantly
Reduce, the impedance of primary coil l2 synchronously reduces, because primary coil l2 is connected with resonance coil l1, now whole circuit is total
Inductance value declines, and original resonant condition is destroyed, and amplitude changes, and output voltage is with change.
Assume that the resonant condition of resonant ring is to maximize, that is, be in peak swing state before switch k closure, when opening
Close after k connects, the internal resistance of switch k is zero or close to zero, and at this moment, the secondary coil l3 of transformator is shorted, and forms one
Short-circuited conducting sleeve, the core reluctance of transformator will be greatly lowered, and the impedance of primary coil l2 synchronously reduces, due to primary coil l2 with
Resonance coil l1 connects, and now the total inductance amount of whole circuit declines, and original resonant condition is destroyed, and amplitude declines；Conversely,
If original state of resonant ring be not maximize, that is, be in non-peak swing state, when switch k connect after, resonance coil l1 with
Inductance value after the primary coil l2 series connection of transformator reduces, the resonant condition of resonant ring be likely to occur following two phenomenons it
One: or amplitude increase, or amplitude reduction；In a word, switch k is connected with the secondary coil l3 of transformator, by switching the break-make of k,
It is capable of the regulation to amplitude, if for the wireless power of terminal appliance, rational voltage can be exported it is ensured that electrical equipment
Trouble free service.
Present embodiments provide a kind of amplitude limit control circuit, described circuit includes: resonance coil, resonant capacitance, switch and
Transformator；The secondary coil of described transformator connect with described switch, the primary coil of described resonance coil and described transformator
The first circuit is formed, described first circuit is with described resonant capacitance in parallel or in series after series connection.When needing to provide stable electricity
During pressure, control described switch conduction, the secondary coil of described transformator is shorted, and then the electricity of the primary coil of described transformator
Sensibility reciprocal reduces, and the inductance value of circuit changes, and therefore resonant condition is changed, using the teaching of the invention it is possible to provide stable voltage or electric current, solves
The problem of driven resonant ring job insecurity.
Optionally, in another embodiment of the present utility model, described switch k is votage control switch；
Wherein, two switch terminals of described votage control switch are connected with the secondary coil of described transformator.
Specifically, described votage control switch is managed for igbt, and the collector and emitter of described igbt pipe is two switch terminals；Institute
State votage control switch to manage for mosfet, the drain electrode of described mosfet pipe and source electrode are two switch terminals；Described votage control switch is triac
Pipe, main electrode t1 of described triac pipe and main electrode t2 are two switch terminals；Described votage control switch is that two igbt pipes are reversely gone here and there
Connection, extremely two switch terminals of two current collections after described two igbt pipe differential concatenations；Described votage control switch is two
Mosfet pipe differential concatenation, two after described two mosfet pipe differential concatenations drain as two switch terminals；Described voltage-controlled
Switch as two triac pipe differential concatenations, two main electrodes t2 after described two triac pipe differential concatenations are two switches
End.
One igbt pipe, mosfet pipe or triac manage as three end votage control switches, two igbt pipe differential concatenations, two
Individual mosfet pipe differential concatenation or two triac pipe differential concatenations are four end votage control switches.
Wherein, igbt pipe (insulated gate bipolar transistor), insulated gate bipolar transistor, be
Partly led by the compound full-control type voltage driven type power that bjt (double pole triode) and mos (insulating gate type field effect tube) form
Body device.Mosfet manages (metal-oxide-semiconductor field-effect transistor), metal-oxide
Thing semiconductor field effect transistor, is a kind of field-effect transistor that can be widely used in analog circuit and digital circuit.Three ends
Two-way exchange switch triac pipe is substantially bi-directional IGCT, and it grows up on the basis of triode thyristor, and it is not
It is only capable of replacing two reversed polarity IGCT in parallel, and only with a triggers circuit.
In order to the votage control switch making those skilled in the art more be apparent from this utility model, refer to
Fig. 2 and Fig. 3.Wherein, what Fig. 2 represented is three end votage control switches, and what Fig. 3 represented is four end votage control switches.
In Fig. 2, three end votage control switch s1 have 1,2,3 three ends, and wherein 2 ends and 3 ends are two switch terminals, and 1 end is to control
End.Igbt pipe has three poles, respectively colelctor electrode c, emitter e and gate pole g.Mosfet pipe also has three poles, respectively leaks
Pole d, grid g and source electrode s.Three poles of triac pipe are respectively main electrode t1, main electrode t2 and grid g.
When three end votage control switch s1 are igbt pipe, foot position corresponding relation is: 1-g, 2-c, 3-e；When three end votage control switches
When s1 is mosfet pipe, foot position corresponding relation is: 1-g, 2-d, 3-s；When three end votage control switch s1 are triac pipe, foot position is right
Should be related to for 1-g, 2-t2,3-t1.
In Fig. 3, four end votage control switch s2 have 1,2,3,4 four ends, and wherein, 2,3 is two switch terminals, and 1,4 is two controls
End processed, wherein, 4 ends are used for being grounded.Described four end votage control switch s2 are two igbt pipe differential concatenations or two mosfet pipes are anti-
To series connection or two triac pipe differential concatenations.
Specifically, when four end votage control switch s2 be two igbt pipe differential concatenations when, foot position corresponding relation is: 1-g, 2-c,
3-c, 4-e, when four end votage control switch s2 be two mosfet pipe differential concatenations when, foot position corresponding relation is: 1-g, 2-d, 3-d,
4-s, when four end votage control switch s2 are two triac pipe differential concatenations, foot position corresponding relation is: 1-g, 2-t2,3-t2,4-
t1.
No matter it should be noted that being three end votage control switch s1, or four end votage control switch s2, control end 1 is for controlling
The break-make of votage control switch.
With reference to Fig. 4 and Fig. 5, Fig. 4 and Fig. 5 describes votage control switch and resonance coil l1, resonant capacitance c1, primary coil
L2, the annexation of secondary coil l3.
The in figure in left side in Fig. 4, a, b represent two outfans of series resonance ring, and arrow represents magnetic direction, and s1 represents
Three end votage control switches, c1 represents resonant capacitance, and l1 represents resonance coil, the primary coil of l2 indication transformer, and l3 represents transformation
The secondary coil of device.Primary coil l2 is connected with resonance coil l1, two switches of secondary coil l3 and three end votage control switch s1
After the series connection of end, the first circuit of composition is connected with resonant capacitance c1.
The in figure on right side in Fig. 4, a, b represent two outfans of parallel resonance ring, and arrow represents magnetic direction, and s1 represents
Three end votage control switches, c1 represents resonant capacitance, and l1 represents resonance coil, the primary coil of l2 indication transformer, and l3 represents transformation
The secondary coil of device.Primary coil l2 is connected with resonance coil l1, two switches of secondary coil l3 and three end votage control switch s1
End series connection.Primary coil l2 is connected with resonance coil l1, secondary coil l3 is connected with two switch terminals of three end votage control switch s1
The first circuit forming afterwards is in parallel with resonant capacitance c1.
The in figure in left side in Fig. 5, a, b represent two outfans of series resonance ring, and arrow represents magnetic direction, and s2 represents
Four end votage control switches, c1 represents resonant capacitance, and l1 represents resonance coil, the primary coil of l2 indication transformer, and l3 represents transformation
The secondary coil of device.Primary coil l2 is connected with resonance coil l1, two switches of secondary coil l3 and four end votage control switch s2
End series connection.Primary coil l2 is connected with resonance coil l1, secondary coil l3 is connected with two switch terminals of four end votage control switch s2
The first circuit forming afterwards is connected with resonant capacitance c1.
The in figure on right side in Fig. 5, a, b represent two outfans of parallel resonance ring, and arrow represents magnetic direction, and s2 represents
Four end votage control switches, c1 represents resonant capacitance, and l1 represents resonance coil, the primary coil of l2 indication transformer, and l3 represents transformation
The secondary coil of device.Primary coil l2 is connected with resonance coil l1, two switches of secondary coil l3 and four end votage control switch s2
End series connection.Primary coil l2 is connected with resonance coil l1, secondary coil l3 is connected with two switch terminals of four end votage control switch s2
The first circuit forming afterwards is in parallel with resonant capacitance c1.
Due to transformator buffer action it is only necessary to by the side of secondary coil l3 arrange one relatively " ", just permissible
There is provided datum for three end votage control switch s1 or four end votage control switch s2, this datum is unrelated with resonant ring, therefore, no
By being three end votage control switch s1 or four end votage control switch s2, resonant ring allows halfwave rectifier output, also allows all wave rectification output.
In the present embodiment, described votage control switch is igbt pipe or mosfet pipe or triac pipe, or described votage control switch is
Two igbt pipe differential concatenations or two mosfet pipe differential concatenations or two triac pipe differential concatenations.Selection mode is more, can
To be selected according to different situations.
In this utility model when needing to provide stable voltage, control described switch conduction.
Specifically, the described switch conduction of described control, specifically includes:
By the way of manual off switch, the mode of the input mode of low and high level or pulse width modulation control described
Switch conduction.
When switch is not votage control switch, switch conduction can be made by the way of manual off switch.When switch is pressure
During control switch, by the way of input low and high level or the mode of pulse width modulation controls described switch conduction.
It should be noted that when controlling described switch conduction by the way of input low and high level, concrete principle is:
When switching as votage control switch, when control end input high level, two switch terminals conductings, connecting resistance is zero or close
In zero, now the secondary coil of described transformator is shorted, and the inductance value of the primary coil of described transformator declines, whole circuit
Total inductance amount decline, original resonant condition is changed, and amplitude changes.When control end is for low level, two switch terminals are short
Road, offresistance is infinitely great, recovers original resonant condition, and amplitude changes.
When controlling described switch conduction by the way of pulse width modulation, concrete principle is:
By the way of pulse width modulation i.e. in switch terminals input pulse width modulated signal, thus it is possible to vary voltage-controlled open
The break-make closed, when votage control switch turn on, connection resistance is zero or close to zero, and now the secondary coil of described transformator is short
Road, the inductance value of the primary coil of described transformator declines, and the total inductance amount of whole circuit declines, and original resonant condition is changed
Become, amplitude changes.When votage control switch turns off, offresistance is infinitely great, recovers original resonant condition, and amplitude changes.
In the present embodiment, by way of using manual off switch, the input mode of low and high level or pulse width adjust
The mode of system controls described switch conduction, and now the secondary coil of described transformator is shorted, the primary coil of described transformator
Inductance value decline, the total inductance amount of whole circuit declines, and then resonant condition is changed, using the teaching of the invention it is possible to provide stable voltage or electricity
Stream, solves the problems, such as driven resonant ring job insecurity.
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 (8)
1. a kind of amplitude limit control circuit is it is characterised in that include:
Resonance coil, resonant capacitance, switch and transformator；
The secondary coil of described transformator is connected with described switch, described resonance coil is connected with the primary coil of described transformator
After form the first circuit, described first circuit is with described resonant capacitance in parallel or in series.
2. circuit according to claim 1 is it is characterised in that described switch is votage control switch；
Wherein, two switch terminals of described votage control switch are connected with the secondary coil of described transformator.
3. circuit according to claim 2 is it is characterised in that described votage control switch is igbt pipe, the collection of described igbt pipe
Electrode and extremely two switch terminals of transmitting.
4. it is characterised in that described votage control switch is managed for mosfet, described mosfet manages circuit according to claim 2
Drain electrode and source electrode be two switch terminals.
5. circuit according to claim 2 it is characterised in that described votage control switch be triac pipe, described triac pipe
Main electrode t1 and main electrode t2 are two switch terminals.
6. circuit according to claim 2 it is characterised in that described votage control switch be two igbt pipe differential concatenations, institute
State extremely two switch terminals of two current collections after two igbt pipe differential concatenations.
7. circuit according to claim 2 it is characterised in that described votage control switch be two mosfet pipe differential concatenations,
After described two mosfet pipe differential concatenations two drain as two switch terminals.
8. circuit according to claim 2 it is characterised in that described votage control switch be two triac pipe differential concatenations, institute
Stating two main electrodes t2 after two triac pipe differential concatenations is two switch terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620840735.XU CN205921460U (en) | 2016-08-04 | 2016-08-04 | Limitation control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620840735.XU CN205921460U (en) | 2016-08-04 | 2016-08-04 | Limitation control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205921460U true CN205921460U (en) | 2017-02-01 |
Family
ID=57871404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620840735.XU Active CN205921460U (en) | 2016-08-04 | 2016-08-04 | Limitation control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205921460U (en) |
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2016
- 2016-08-04 CN CN201620840735.XU patent/CN205921460U/en active Active
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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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210317 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. |