CN106253495B - A kind of clipping control circuit and method - Google Patents
A kind of clipping control circuit and method Download PDFInfo
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- CN106253495B CN106253495B CN201610634365.9A CN201610634365A CN106253495B CN 106253495 B CN106253495 B CN 106253495B CN 201610634365 A CN201610634365 A CN 201610634365A CN 106253495 B CN106253495 B CN 106253495B
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Abstract
This application provides a kind of clipping control circuit and method, the circuit includes: resonance coil, resonant capacitance, switch and transformer；The resonance coil and the resonant capacitance are in parallel or in series；The primary coil of the transformer is in parallel with the resonance coil；The secondary coil of the transformer and the switch in parallel.When needing to provide stable voltage, control the switch conduction, the secondary coil of the transformer is short-circuited at this time, the inductance value of the primary coil of the transformer declines, the total inductance amount decline of entire circuit, and then resonant state is changed, and is capable of providing stable voltage or electric current, solves the problems, such as driven resonant ring job insecurity.
Description
Technical field
The present invention relates to wireless power fields, more specifically, being related to a kind of clipping control circuit and method.
Background technique
Driven resonant ring has the double grading for receiving energy and emitted energy, in the terminal of wireless power, from dynamic resonance
Ring Chang Dangzuo receives resonant ring and uses, and powers for terminal appliance.
Since driven resonant ring works in resonant state, the voltage and current amplitude in resonant ring is very big and unstable,
If powered directly to terminal appliance, huge electric current and voltage fluctuation can be generated, serious influence can be brought to terminal appliance,
Electric appliance can even be burnt.
Therefore, a kind of amplitude for controlling driven resonance loop voltag or electric current is needed, guarantees driven resonant ring the operation is stable
Circuit.
Summary of the invention
In view of this, the present invention provides a kind of clipping control circuit and method, to solve driven resonant ring job insecurity
The problem of.
In order to solve the above technical problems, present invention employs following technical solutions:
A kind of clipping control circuit, comprising:
Resonance coil, resonant capacitance, switch and transformer；
The resonance coil and the resonant capacitance are in parallel or in series；The primary coil of the transformer and the resonance
Coils from parallel connection of coils；The secondary coil of the transformer is connected with the switch.
Preferably, the switch is votage control switch；
Wherein, two switch terminals of the votage control switch are connected with the secondary coil of the transformer.
Preferably, the votage control switch is IGBT pipe, and the collector and emitter of the IGBT pipe is two switch terminals.
Preferably, the votage control switch is MOSFET pipe, and the drain electrode of the MOSFET pipe and source electrode are two switch terminals.
Preferably, the votage control switch is TRIAC pipe, and the main electrode T1 and main electrode T2 of the TRIAC pipe are two and open
Guan Duan.
Preferably, the votage control switch is two IGBT pipe differential concatenations, after described two IGBT pipe differential concatenations
Two current collections extremely two switch terminals.
Preferably, the votage control switch be two MOSFET pipe differential concatenations, described two MOSFET pipe differential concatenations it
Two drain electrodes afterwards are two switch terminals.
Preferably, the votage control switch is two TRIAC pipe differential concatenations, after described two TRIAC pipe differential concatenations
Two main electrode T2 be two switch terminals.
A kind of limiting control method, applied to clipping control circuit described in above-mentioned any one, which comprises
When needing to provide stable voltage, the switch conduction is controlled.
Preferably, the control switch conduction, specifically includes:
By the way of manual off switch, the mode of the mode of input low and high level or pulse width modulation control it is described
Switch conduction.
Compared to the prior art, the invention has the following advantages:
The present invention provides a kind of clipping control circuit and method, the circuit includes: resonance coil, resonant capacitance, opens
Pass and transformer；The resonance coil and the resonant capacitance are in parallel or in series；The primary coil of the transformer with it is described
Resonance coil is in parallel；The secondary coil of the transformer and the switch in parallel.When needing to provide stable voltage, institute is controlled
Switch conduction is stated, the secondary coil of the transformer is short-circuited at this time, the inductance value decline of the primary coil of the transformer, whole
The total inductance amount of a circuit declines, and then resonant state is changed, and is capable of providing stable voltage or electric current, is solved driven humorous
The problem of vibration ring job insecurity.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of resonant ring in the present invention；
Fig. 2 is the structural schematic diagram of three end votage control switches in the present invention；
Fig. 3 is the structural schematic diagram of four end votage control switches in the present invention；
Fig. 4 is in the present invention using the structural schematic diagram of the resonant ring of three end votage control switches；
Fig. 5 is in the present invention using the structural schematic diagram of the resonant ring of four end votage control switches.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of clipping control circuit, the circuit includes:
Resonance coil, resonant capacitance, switch and transformer；
The resonance coil and the resonant capacitance are in parallel or in series；The primary coil of the transformer and the resonance
Coils from parallel connection of coils；The secondary coil of the transformer is connected with the switch.
Referring to Fig.1, in Fig. 1 in the figure in left side, A, B indicate that two output ends of series resonance ring, arrow indicate magnetic field side
To K indicates that switch, C1 indicate that resonant capacitance, L1 indicate that resonance coil, the primary coil of L2 indication transformer, L3 indicate transformation
The secondary coil of device.
In Fig. 1 in the figure on right side, A, B indicate that two output ends of parallel resonance ring, arrow indicate that magnetic direction, K indicate
Switch, C1 indicate that resonant capacitance, L1 indicate resonance coil, the primary coil of L2 indication transformer, the secondary of L3 indication transformer
Coil.
When switch K open circuit, the secondary coil L3 of transformer does not work, and at this moment, is equivalent to resonance coil L1 and transformation
Device primary coil L2 is in parallel, and the inductance after parallel connection can be calculated as follows:
1/Lt=1/L1+1/L2
Lt=(L1*L2)/(L1+L2)
Lt is total inductance amount in formula, and L1 is the inductance of resonance coil, and L2 is the inductance of the primary coil of transformer, and
After connection, Lt is less than L1, again smaller than L2.
When switch K closure, the secondary coil L3 of transformer is short-circuited, and forms a short-circuited conducting sleeve, the internal resistance of transformer
It is greatly lowered, the inductance of the primary coil L2 of transformer significantly reduces；According to the calculation formula of resonance frequency:The inductance of entire circuit is reduced at this time, and the original resonant state of circuit is destroyed, amplitude corresponding change,
Output voltage is just different.
The course of work of each element in Fig. 1 are as follows:
After the secondary coil L3 tandem tap K of transformer, the primary coil L2 of transformer has reformed into a variable coil,
The inductance of primary coil L2 will be different with cut-offfing for switch K.When switch K conducting, the internal resistance of switch K is zero or connects
It is bordering on zero, at this moment, the secondary coil of transformer is short-circuited, and forms a short-circuited conducting sleeve, and the core reluctance of transformer will significantly drop
Low, the impedance of primary coil L2 is synchronous to be reduced, since primary coil L2 is in parallel with resonance coil L1, total electricity of entire circuit at this time
Sensibility reciprocal decline, original resonant state are destroyed, and amplitude changes, and output voltage is with change.
Present embodiments provide a kind of clipping control circuit, the circuit include: resonance coil, resonant capacitance, switch and
Transformer；The resonance coil and the resonant capacitance are in parallel or in series；The primary coil of the transformer and the resonance
Coils from parallel connection of coils；The secondary coil of the transformer and the switch in parallel.When needing to provide stable voltage, opened described in control
Conducting is closed, the secondary coil of the transformer is short-circuited at this time, the inductance value decline of the primary coil of the transformer, entire electricity
The total inductance amount on road declines, and then resonant state is changed, and is capable of providing stable voltage or electric current, solves driven resonant ring
The problem of job insecurity.
Optionally, in another embodiment of the present invention, the switch K is votage control switch；
Wherein, two switch terminals of the votage control switch are connected with the secondary coil of the transformer.
Specifically, the votage control switch is IGBT pipe, the collector and emitter of the IGBT pipe is two switch terminals；Institute
Votage control switch is stated as MOSFET pipe, the drain electrode of the MOSFET pipe and source electrode are two switch terminals；The votage control switch is TRIAC
Pipe, the main electrode T1 and main electrode T2 of the TRIAC pipe are two switch terminals；The votage control switch is two reversed strings of IGBT pipe
Join, two current collections extremely two switch terminals after described two IGBT pipe differential concatenations；The votage control switch is two
MOSFET pipe differential concatenation, two drain electrodes after described two MOSFET pipe differential concatenations are two switch terminals；It is described voltage-controlled
Switch is two TRIAC pipe differential concatenations, and two main electrode T2 after described two TRIAC pipe differential concatenations are two switches
End.
One IGBT pipe, MOSFET pipe or TRIAC pipe are a three end votage control switches, two IGBT pipe differential concatenations, two
A MOSFET pipe differential concatenation or two TRIAC pipe differential concatenations are a four end votage control switches.
Wherein, IGBT manages (Insulated Gate Bipolar Transistor), and insulated gate bipolar transistor is
It is 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) are formed
Body device.MOSFET manages (Metal-Oxide-Semiconductor Field-Effect Transistor), metal-oxide
Object 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 thyristor, it is grown up on the basis of triode thyristor, it is not
It is only capable of the thyristor instead of two reversed polarity parallel connections, and only with a trigger circuit.
In order to make those skilled in the art more be apparent from the votage control switch in the present invention, referring to figure 2.
And Fig. 3.Wherein, what Fig. 2 was indicated is three end votage control switches, and what Fig. 3 was indicated is four end votage control switches.
Three end votage control switch S1 share 1,2,3 three end in Fig. 2, wherein 2 ends and 3 ends are two switch terminals, 1 end is control
End.There are three pole, respectively collector C, emitter E and gate pole G altogether for IGBT pipe.Also there are three poles for MOSFET pipe, respectively leak
Pole D, grid G and source 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 relationship are as follows: 1-G, 2-C, 3-E；When three end votage control switches
When S1 is MOSFET pipe, foot position corresponding relationship are as follows: 1-G, 2-D, 3-S；When three end votage control switch S1 are TRIAC pipe, foot position is right
It should be related to are as follows: 1-G, 2-T2,3-T1.
Four end votage control switch S2 share 1,2,3,4 four end in Fig. 3, wherein 2,3 be two switch terminals, and 1,4 be two controls
End processed, wherein 4 ends are used to be grounded.The four ends votage control switch S2 is that 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 are two IGBT pipe differential concatenations, foot position corresponding relationship are as follows: 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 relationship are as follows: 1-G, 2-D, 3-D,
4-S, when four end votage control switch S2 are two TRIAC pipe differential concatenations, foot position corresponding relationship are as follows: 1-G, 2-T2,3-T2,4-
T1。
It should be noted that either three end votage control switch S1 or four end votage control switch S2, control terminal 1 is used to control
The on-off of votage control switch.
Votage control switch and resonance coil L1, resonant capacitance C1, primary coil are described referring to Fig. 4 and Fig. 5, Fig. 4 and Fig. 5
The connection relationship of L2, secondary coil L3.
In Fig. 4 in the figure in left side, A, B indicate that two output ends of series resonance ring, arrow indicate that magnetic direction, S1 indicate
Three end votage control switches, C1 indicate that resonant capacitance, L1 indicate that resonance coil, the primary coil of L2 indication transformer, L3 indicate transformation
The secondary coil of device.Primary coil L2 is in parallel with resonance coil L1, two switches of secondary coil L3 and three end votage control switch S1
End series connection.
In Fig. 4 in the figure on right side, A, B indicate that two output ends of parallel resonance ring, arrow indicate that magnetic direction, S1 indicate
Three end votage control switches, C1 indicate that resonant capacitance, L1 indicate that resonance coil, the primary coil of L2 indication transformer, L3 indicate transformation
The secondary coil of device.Primary coil L2 is in parallel with resonance coil L1, two switches of secondary coil L3 and three end votage control switch S1
End series connection.
In Fig. 5 in the figure in left side, A, B indicate that two output ends of series resonance ring, arrow indicate that magnetic direction, S2 indicate
Four end votage control switches, C1 indicate that resonant capacitance, L1 indicate that resonance coil, the primary coil of L2 indication transformer, L3 indicate transformation
The secondary coil of device.Primary coil L2 is in parallel with resonance coil L1, two switches of secondary coil L3 and four end votage control switch S2
End series connection.
In Fig. 5 in the figure on right side, A, B indicate that two output ends of parallel resonance ring, arrow indicate that magnetic direction, S2 indicate
Four end votage control switches, C1 indicate that resonant capacitance, L1 indicate that resonance coil, the primary coil of L2 indication transformer, L3 indicate transformation
The secondary coil of device.Primary coil L2 is in parallel with resonance coil L1, two switches of secondary coil L3 and four end votage control switch S2
End series connection.
Due to the buffer action of transformer, it is only necessary to one opposite " ground " is arranged in the side of secondary coil L3, it can
Reference level is provided for three end votage control switch S1 or four end votage control switch S2, this reference level is unrelated with resonant ring, therefore, nothing
By being three end votage control switch S1 or four end votage control switch S2, resonant ring allows halfwave rectifier to export, and also full-wave rectification is allowed to export.
In the present embodiment, the votage control switch is IGBT pipe or MOSFET pipe or TRIAC pipe or the 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 another embodiment of the present invention, a kind of limiting control method is provided, which is characterized in that be applied to above-mentioned clipping
Control circuit, which comprises
When needing to provide stable voltage, the switch conduction is controlled.
Specifically, the control switch conduction, specifically includes:
By the way of manual off switch, the mode of the mode of input low and high level or pulse width modulation control it is 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
When control switch, by the way of inputting low and high level or the mode of pulse width modulation controls the switch conduction.
It should be noted that when controlling the switch conduction, concrete principle by the way of inputting low and high level are as follows:
When switch is votage control switch, when control terminal input high level, two switch terminals conductings connect resistance and are zero or approach
In zero, the secondary coil of the transformer is short-circuited at this time, the inductance value decline of the primary coil of the transformer, entire circuit
The decline of total inductance amount, original resonant state is changed, and amplitude changes.When control terminal is low level, two switch terminals are short
Road, offresistance is infinitely great, restores original resonant state, and amplitude changes.
The switch conduction, concrete principle are controlled by the way of modulating using pulse width are as follows:
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 to open
The on-off of pass, when votage control switch conducting, connection resistance is zero or close to zero, and the secondary coil of the transformer is short at this time
Road, the inductance value decline of the primary coil of the transformer, the total inductance amount decline of entire circuit, original resonant state are changed
Become, amplitude changes.When votage control switch shutdown, offresistance is infinitely great, restores original resonant state, and amplitude changes.
In the present embodiment, by using the mode of manual off switch, the mode or pulse width tune of input low and high level
The mode of system controls the switch conduction, and the secondary coil of the transformer is short-circuited at this time, the primary coil of the transformer
Inductance value decline, the total inductance amount decline of entire circuit, and then resonant state is changed, and is capable of providing stable voltage or electricity
Stream, solves the problems, such as driven resonant ring job insecurity.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of clipping control circuit characterized by comprising
Resonance coil, resonant capacitance, switch and transformer；
The resonance coil and the resonant capacitance are in parallel or in series；The primary coil of the transformer and the resonance coil
It is in parallel；The secondary coil of the transformer is connected with the switch；
When the switch disconnects, the secondary coil of the transformer is switched off, the resonance coil, the resonant capacitance and institute
State the primary coil composition resonant ring of transformer；
When the switch is closed, the secondary coil of the transformer is short-circuited, the resonance coil, the resonant capacitance, institute
State the primary coil of transformer and the secondary coil composition resonant ring of the transformer.
2. circuit according to claim 1, which is characterized in that the switch is votage control switch；
Wherein, two switch terminals of the votage control switch are connected with the secondary coil of the transformer.
3. circuit according to claim 2, which is characterized in that the votage control switch is IGBT pipe, the collection of the IGBT pipe
Electrode and transmitting extremely two switch terminals.
4. circuit according to claim 2, which is characterized in that the votage control switch is MOSFET pipe, the MOSFET pipe
Drain electrode and source electrode be two switch terminals.
5. circuit according to claim 2, which is characterized in that the votage control switch is TRIAC pipe, the TRIAC pipe
Main electrode T1 and main electrode T2 is two switch terminals.
6. circuit according to claim 2, which is characterized in that the votage control switch is two IGBT pipe differential concatenations, institute
State two current collections extremely two switch terminals after two IGBT pipe differential concatenations.
7. circuit according to claim 2, which is characterized in that the votage control switch is two MOSFET pipe differential concatenations,
Two drain electrodes after described two MOSFET pipe differential concatenations are two switch terminals.
8. circuit according to claim 2, which is characterized in that the votage control switch is two TRIAC pipe differential concatenations, institute
Stating two main electrode T2 after two TRIAC pipe differential concatenations is two switch terminals.
9. a kind of limiting control method, which is characterized in that applied to the clipping control as described in claim 1~8 any one
Circuit, which comprises
When needing to provide stable voltage, the switch conduction is controlled.
10. according to the method described in claim 9, it is characterized in that, the control switch conduction, specifically includes:
By the way of manual off switch, input low and high level mode or pulse width modulation mode control the switch
Conducting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610634365.9A CN106253495B (en) | 2016-08-04 | 2016-08-04 | A kind of clipping control circuit and method |
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| CN201610634365.9A CN106253495B (en) | 2016-08-04 | 2016-08-04 | A kind of clipping control circuit and method |
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| CN106253495B true CN106253495B (en) | 2019-06-21 |
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| CN111306743B (en) * | 2020-03-02 | 2021-06-18 | 广东美的暖通设备有限公司 | Air conditioner and multi-split central air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023335A (en) * | 2012-12-27 | 2013-04-03 | 万仁春 | LLC (logical link control) converter synchronous rectification method and device |
| CN104578345A (en) * | 2015-01-23 | 2015-04-29 | 山东大学 | Electromagnetic resonance type wireless charging device and control method based on CLL resonant transformation |
| CN206004421U (en) * | 2016-08-04 | 2017-03-08 | 中惠创智无线供电技术有限公司 | A kind of amplitude limit control circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006324035A (en) * | 2005-05-17 | 2006-11-30 | Koito Mfg Co Ltd | Discharge lamp lighting circuit |
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2016
- 2016-08-04 CN CN201610634365.9A patent/CN106253495B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023335A (en) * | 2012-12-27 | 2013-04-03 | 万仁春 | LLC (logical link control) converter synchronous rectification method and device |
| CN104578345A (en) * | 2015-01-23 | 2015-04-29 | 山东大学 | Electromagnetic resonance type wireless charging device and control method based on CLL resonant transformation |
| CN206004421U (en) * | 2016-08-04 | 2017-03-08 | 中惠创智无线供电技术有限公司 | A kind of amplitude limit control circuit |
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Denomination of invention: A limiting control circuit and method Granted publication date: 20190621 Pledgee: Huishang Bank Co.,Ltd. Fuyang Yingquan Branch Pledgor: ZONECHARGE (SHENZHEN) WIRELESS POWER TECHNOLOGY Co.,Ltd. Registration number: Y2024980029765 |
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