CN205992858U - Decompression DC translation circuit and step down DC converter - Google Patents
Decompression DC translation circuit and step down DC converter Download PDFInfo
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- CN205992858U CN205992858U CN201621051356.9U CN201621051356U CN205992858U CN 205992858 U CN205992858 U CN 205992858U CN 201621051356 U CN201621051356 U CN 201621051356U CN 205992858 U CN205992858 U CN 205992858U
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- decompression
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- translation circuit
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- 230000006837 decompression Effects 0.000 title claims abstract description 69
- 238000013519 translation Methods 0.000 title claims abstract description 65
- 230000008878 coupling Effects 0.000 claims abstract description 29
- 238000010168 coupling process Methods 0.000 claims abstract description 29
- 238000005859 coupling reaction Methods 0.000 claims abstract description 29
- 238000004146 energy storage Methods 0.000 claims abstract description 17
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 17
- 230000005669 field effect Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 21
- 230000005611 electricity Effects 0.000 description 6
- 230000036772 blood pressure Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model discloses a kind of decompression DC translation circuit and step down DC converter, belong to field of circuit technology.Described decompression DC translation circuit includes：Power module, switch module, load, afterflow module, coupling inductance and voltage stabilizing energy-storage module；Switch module, coupling inductance and load constitute series circuit, and the two ends of power module are connected with the two ends of series circuit, and voltage stabilizing energy-storage module is in parallel with load；Coupling inductance includes primary side and secondary side, the connection between the negative pole of afterflow module and primary side and secondary side, and positive pole is connected with the negative pole of power module.This utility model passes through the decompression DC translation circuit that power module, switch module, load, afterflow module, coupling inductance and voltage stabilizing energy-storage module are constituted, provide a kind of structure of new decompression DC translation circuit, solve the problems, such as that the structure of decompression DC translation circuit in correlation technique is more single.Reach the effect of the structure of abundant decompression DC translation circuit.
Description
Technical field
This utility model is related to field of circuit technology, particularly to a kind of decompression DC translation circuit and decompression DC conversion
Device.
Background technology
DC transfer circuit (English：Direct Current converting circuit) it is that amplitude fixation is straight
The translation circuit that stream voltage transformation becomes amplitude and polarity is variable DC voltage.
There is a kind of decompression DC translation circuit, as shown in figure 1, this decompression DC translation circuit includes switching in correlation technique
11st, diode 12, inductance 13, power supply 14 and electrical appliance 15.During switch 11 conducting, power supply 14 is powered to electrical appliance 15, uses
The voltage of electrical equipment 15 is equal to the voltage E at power supply 14 two ends, and the electric current of electrical appliance 15 exponentially rises；In the switch 11 shutoff phase
Between, through diode 12 afterflow, the voltage of electrical appliance 15 is approximately 0 to the electric current of electrical appliance 15, and the electric current of electrical appliance 15 is exponentially bent
Line declines.The meansigma methodss of electrical appliance 15 voltage are：Wherein, t1For the time of switch 11 conducting, t2For switch
The time turning off, due to t1Less than t1+t2, thus reach the effect of blood pressure lowering, voltage conversion ratio
During realizing this utility model, inventor finds that correlation technique at least has problems with：Correlation technique
The structure of middle decompression DC translation circuit is more single.
Utility model content
Structure in order to solve the problems, such as decompression DC translation circuit in prior art is more single, and this utility model is implemented
Example provides a kind of decompression DC translation circuit and step down DC converter.Described technical scheme is as follows：
According to first aspect of the present utility model, there is provided a kind of decompression DC translation circuit, described decompression DC conversion
Circuit includes：
Power module, switch module, load, afterflow module, coupling inductance and voltage stabilizing energy-storage module；
Described switch module, described coupling inductance and described load constitute series circuit, the two ends of described power module with
The two ends of described series circuit connect, and described voltage stabilizing energy-storage module is in parallel with described load；
Described coupling inductance includes primary side and secondary side, the negative pole of described afterflow module and described primary side and described two
Connection between secondary side, positive pole is connected with the negative pole of described power module.
Optionally, described decompression DC translation circuit also includes control module, described control module and described switch module
Connect, for controlling the time of described switch module conducting and the time turning off, make the voltage at described load two ends and described electricity
The voltage ratio at source module two ends meetsWherein, described n1For the coil turn of described primary side, described n2
For the coil turn of described secondary side, describedDescribed t1For the time of described switch module conducting, described t2For institute
State the time of switch module shutoff.
Optionally, described n1/n2More than preset value.
Optionally, described switch module includes MOSFET.
Optionally, described MOSFET includes source electrode, drain and gate, and described grid is connected with described control module, described
The positive pole of source electrode and described power module connects, and described drain electrode and described coupling inductance connect.
Optionally, described afterflow module includes fly-wheel diode.
Optionally, described voltage stabilizing energy-storage module includes capacitor.
Optionally, the Same Name of Ends of described primary side is connected with the positive pole of described power supply, the Same Name of Ends of described secondary side and institute
The negative pole stating afterflow module connects.
Optionally, described control module be controller, control circuit, intervalometer or control IC.
According to second aspect of the present utility model, provide a kind of step down DC converter, described step down DC converter bag
Include the decompression DC translation circuit described in first aspect.
The beneficial effect brought of technical scheme that this utility model embodiment provides is：
The blood pressure lowering being constituted by power module, switch module, load, afterflow module, coupling inductance and voltage stabilizing energy-storage module
A kind of DC transfer circuit, there is provided structure of new decompression DC translation circuit, solves decompression DC in correlation technique and becomes
Change the more single problem of the structure of circuit.Reach the effect of the structure of abundant decompression DC translation circuit.
Brief description
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, below will be to required in embodiment description
Accompanying drawing to be used be briefly described it should be apparent that, drawings in the following description are only that of the present utility model some are real
Apply example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the structural representation of one of correlation technique decompression DC translation circuit；
Fig. 2 is a kind of structural representation of decompression DC translation circuit that this utility model enforcement exemplifies；
Fig. 3-1 is the structural representation of another kind of decompression DC translation circuit that this utility model enforcement exemplifies；
Fig. 3-2 is the decompression DC translation circuit shown in decompression DC translation circuit and Fig. 3-1 in correlation technique
Voltage conversion ratio and the graph of relation of dutycycle.
In each accompanying drawing above-mentioned, the implication of reference is：11- switchs, 12- diode, 13- inductance, 14- power supply, 15-
Electrical appliance, 21- power module, 22- switch module, 23- loads, 24- afterflow module, 25- coupling inductance, 26- voltage stabilizing energy storage mould
Block, 251- primary side, 252- secondary side, the negative pole of 24a- afterflow module, the positive pole of 24b- afterflow module, 27- control module,
221-MOSFET, 241- fly-wheel diode, 261- capacitor, 251a and 252a- Same Name of Ends, 31,32,33,34 and 35- voltage turn
Change than the relation curve with dutycycle.
By above-mentioned accompanying drawing it has been shown that the clear and definite embodiment of this utility model, hereinafter will be described in more detail.These
Accompanying drawing and word description are not intended to limit the scope of this utility model design by any mode, but by reference to specific
Embodiment illustrates concept of the present utility model for those skilled in the art.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, new to this practicality below in conjunction with accompanying drawing
Type embodiment is described in further detail.
Fig. 2 is a kind of structural representation of decompression DC translation circuit that this utility model enforcement exemplifies.This blood pressure lowering is straight
Stream translation circuit can include：
Power module 21, switch module 22, load 23, afterflow module 24, coupling inductance 25 and voltage stabilizing energy-storage module 26.
Switch module 22, coupling inductance 25 and load 23 composition series circuit, the two ends of power module 21 and series circuit
Two ends connect, voltage stabilizing energy-storage module 26 with load 23 in parallel.
Coupling inductance 25 includes primary side 251 and secondary side 252, the negative pole 24a of afterflow module 24 and primary side 251 and two
Connection between secondary side 252, positive pole 24b is connected with the negative pole of power module 21.
In sum, the decompression DC translation circuit that this utility model embodiment provides, by power module, switching molding
The decompression DC translation circuit that block, load, afterflow module, coupling inductance and voltage stabilizing energy-storage module are constituted, there is provided a kind of new
The structure of decompression DC translation circuit, solves the problems, such as that the structure of decompression DC translation circuit in correlation technique is more single.
Reach the effect of the structure of abundant decompression DC translation circuit.
Further, refer to Fig. 3-1, another kind of decompression DC conversion of this utility model embodiment offer is provided
The structural representation of circuit, this decompression DC translation circuit increased on the basis of the decompression DC translation circuit shown in Fig. 2
Preferred part, so that the decompression DC translation circuit that this utility model embodiment provides has better performance.
Optionally, decompression DC translation circuit also includes control module 27, and control module 27 is connected with switch module 22, uses
In time and the time turning off of controlling switch module 22 conducting, make the voltage at load 23 two ends and the electricity at power module 21 two ends
Pressure ratio meetsWherein, n1For the coil turn of primary side 251, n2For the coil turn of secondary side 252,t1For the time of switch module 22 conducting, t2The time turning off for switch module 22.
Optionally, n1/n2More than preset value, n1/n2Bigger, load the voltage at 23 two ends and the electricity at power module 21 two ends
Pressure ratio is less, and that is, the blood pressure lowering ability of decompression DC change-over circuit is stronger.
Now the working method of the decompression DC translation circuit that Fig. 3-1 provides is illustrated：
When switch module 22 turns on, power module 21 fills to the primary side 251 of coupling inductance 25 and secondary side 252 simultaneously
Electricity.If the voltage ratio of the primary side 251 of coupling inductance 25 and secondary side 252 is n1：n2(coupling inductance primary side and secondary side
Turn ratio is equal to the voltage ratio of primary side and secondary side), then now, the voltage u at coupling inductance 25 primary side 251 two endsL1=
(Ui-Uo)/(n2/n1+ 1), wherein UiFor the voltage at power module 21 two ends, UoFor loading the voltage at 23 two ends, coupling inductance 25
The voltage u at secondary side 252 two endsL2=n2/n1·(Ui-Uo)/(n2/n1+1).
And when switch module 22 turns off, coupling inductance 25 is discharged.Now, the secondary side 252 of coupling inductance 25 with
Afterflow module 24 and load 23, voltage stabilizing energy-storage module 26 constitute discharge loop, now secondary side 252 two ends of coupling inductance 25
Voltage uL2=-Uo.
The ON time of switch module 22 is t1, the turn-off time is t2, then understand the dutycycle of this decompression DC translation circuit
For D=t1/(t1+t2).The voltage conversion ratio of the Buck conversion circuit (also known as BUCK circuit) in correlation technique generally equal to accounts for
Empty ratio D, voltage conversion ratio is the ratio of the voltage of the voltage at load two ends and both ends of power.
Further according to voltage-second balance principle, that is, inductance variable quantity of electric current in a cycle is zero, can obtain uL2*t1+
uL2*t2=0.
Further, it is possible to obtainWherein, Uo/UiCan be for voltage conversion ratio it is clear that being less than
D in correlation technique.It is less electricity that decompression DC translation circuit in correlation technique is wanted a larger voltage conversion
Pressure may need to carry out the conversion of a medium voltage, after being such as 8V voltage by 48V (volt) voltage conversion, further by its turn
It is changed to 3.3V voltage.Such design undoubtedly will increase the area of circuit board and the cost of circuit.
Optionally, switch module 22 includes mos field effect transistor (English:Metal-Oxide-
Semiconductor Field-Effect Transistor；Referred to as：MOSFET)221.
Optionally, MOSFET includes source electrode s, drain electrode d and grid g, and grid g is connected with control module 27, source electrode s and power supply
The positive pole of module 21 connects, and drain electrode d and coupling inductance 25 connect.
Optionally, afterflow module 24 includes fly-wheel diode 241.Fast recovery diode or Schottky two can be selected
Pole pipe is as fly-wheel diode.This fly-wheel diode 241 constitutes a T-shape unit with coupling inductance 25.
Optionally, voltage stabilizing energy-storage module 26 includes capacitor 261.
Optionally, the Same Name of Ends 251a of primary side 251 is connected with the positive pole of power module 21, the Same Name of Ends of secondary side 252
252a is connected with the negative pole of afterflow module 24.The Same Name of Ends of wherein primary side 251 refers to the of the same name of primary side and secondary side 252
End, i.e. 251a and 252a Same Name of Ends each other.The definition of Same Name of Ends can be：If primary coil (primary side) and secondary coil (two
Secondary side) unanimously (regulation, in two opposite side coiling primary coils and secondary coil respectively of rectangle iron core, starts coiling to direction of winding
When, it is that direction of winding is consistent that two wires all penetrate iron core from observer visual angle), then the initiating terminal of two coil-windings is of the same name each other
End, the middle not-go-end of two coil-windings also Same Name of Ends each other.
Optionally, control module be controller, control circuit, intervalometer or control integrated circuit (English：
integrated circuit；Referred to as：IC).
In order to become apparent from intuitively contrasting decompression DC translation circuit and the correlation technique of the offer of this utility model embodiment
The relation of the blood pressure lowering ability of middle decompression DC translation circuit, reduction voltage circuit (Fig. 1 in the correlation technique according to the determination of theoretical formula
The circuit illustrating) voltage conversion ratio with choose different parameters when this utility model embodiment provide decompression DC conversion electricity
As shown in figure 3-2, wherein abscissa represents dutycycle to the voltage change ratio on road, and vertical coordinate represents voltage conversion ratio, curve 35 table
The dutycycle of decompression DC translation circuit in correlation technique shown in diagram 1 and the relation of voltage conversion ratio, this decompression DC
The voltage conversion ratio of translation circuit is equal with dutycycle, and curve 31 to curve 34 represents different turn ratios (primary side and secondary side
Turn ratio) when, the relation of the dutycycle of decompression DC translation circuit and voltage conversion ratio that this utility model embodiment provides,
Curve 31 is the curve that turn ratio is when 3/1, and curve 32 is the curve that turn ratio is when 2/1, when curve 33 is 1/1 for turn ratio
Curve, curve 34 is curve that turn ratio is when 1/2.Curve shown by from Fig. 3-2 is it is recognised that this utility model is implemented
The decompression DC translation circuit that example provides can realize larger range of conversion ratio, meets the demand in more circuit design.
Exemplary, when turn ratio is 3/1, the decompression DC translation circuit that this utility model embodiment provides can be easily reached
0.1 voltage conversion ratio, can be the voltage of 10V by the voltage conversion of 100V.
In sum, the decompression DC translation circuit that this utility model embodiment provides, by power module, switching molding
The decompression DC translation circuit that block, load, afterflow module, coupling inductance and voltage stabilizing energy-storage module are constituted, there is provided a kind of new
The structure of decompression DC translation circuit, solves the problems, such as that the structure of decompression DC translation circuit in correlation technique is more single.
Reach the effect of the structure of abundant decompression DC translation circuit.
Additionally, this utility model embodiment also provides a kind of step down DC converter, this step down DC converter can wrap
Include the decompression DC translation circuit shown in decompression DC translation circuit or Fig. 3-1 shown in Fig. 2.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all in this practicality
Within new spirit and principle, any modification, equivalent substitution and improvement made etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (10)
1. a kind of decompression DC translation circuit is it is characterised in that described decompression DC translation circuit includes：
Power module, switch module, load, afterflow module, coupling inductance and voltage stabilizing energy-storage module；
Described switch module, described coupling inductance and described load constitute series circuit, the two ends of described power module with described
The two ends of series circuit connect, and described voltage stabilizing energy-storage module is in parallel with described load；
Described coupling inductance includes primary side and secondary side, the negative pole of described afterflow module and described primary side and described secondary side
Between connection, positive pole is connected with the negative pole of described power module.
2. decompression DC translation circuit according to claim 1 is it is characterised in that described decompression DC translation circuit also wraps
Include control module, described control module is connected with described switch module, for controlling time and the pass of described switch module conducting
The disconnected time, the voltage at described load two ends is made to meet with the voltage ratio at described power module two endsIts
In, described n1For the coil turn of described primary side, described n2For the coil turn of described secondary side, describedInstitute
State t1For the time of described switch module conducting, described t2The time turning off for described switch module.
3. decompression DC translation circuit according to claim 2 is it is characterised in that described n1/n2More than preset value.
4. decompression DC translation circuit according to claim 2 is it is characterised in that described switch module includes metal oxidation
Thing semiconductor field effect transistor MOSFET.
5. decompression DC translation circuit according to claim 4 is it is characterised in that described MOSFET includes source electrode, drain electrode
And grid, described grid is connected with described control module, and the positive pole of described source electrode and described power module connects, described drain electrode and
Described coupling inductance connects.
6. decompression DC translation circuit according to claim 1 is it is characterised in that described afterflow module includes afterflow two pole
Pipe.
7. decompression DC translation circuit according to claim 1 is it is characterised in that described voltage stabilizing energy-storage module includes electric capacity
Device.
8. decompression DC translation circuit according to claim 1 it is characterised in that the Same Name of Ends of described primary side with described
The positive pole of power supply connects, and the Same Name of Ends of described secondary side is connected with the negative pole of described afterflow module.
9. decompression DC translation circuit according to claim 2 is it is characterised in that described control module is controller, control
Circuit processed, intervalometer or control IC.
10. a kind of step down DC converter is it is characterised in that described step down DC converter includes the arbitrary institute of claim 1 to 9
The decompression DC translation circuit stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051356.9U CN205992858U (en) | 2016-09-12 | 2016-09-12 | Decompression DC translation circuit and step down DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051356.9U CN205992858U (en) | 2016-09-12 | 2016-09-12 | Decompression DC translation circuit and step down DC converter |
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| Publication Number | Publication Date |
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| CN205992858U true CN205992858U (en) | 2017-03-01 |
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| CN201621051356.9U Expired - Fee Related CN205992858U (en) | 2016-09-12 | 2016-09-12 | Decompression DC translation circuit and step down DC converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395015A (en) * | 2017-08-08 | 2017-11-24 | 哈尔滨工业大学 | A kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance |
| CN109560701A (en) * | 2018-11-27 | 2019-04-02 | 上海交通大学 | A kind of zero current Zero-voltage soft switch Buck converter |
| CN109698618A (en) * | 2019-01-04 | 2019-04-30 | 国网山东省电力公司淄博供电公司 | The high-gain boost converter and its control method that coupling inductance boosting unit is realized |
-
2016
- 2016-09-12 CN CN201621051356.9U patent/CN205992858U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395015A (en) * | 2017-08-08 | 2017-11-24 | 哈尔滨工业大学 | A kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance |
| CN109560701A (en) * | 2018-11-27 | 2019-04-02 | 上海交通大学 | A kind of zero current Zero-voltage soft switch Buck converter |
| CN109698618A (en) * | 2019-01-04 | 2019-04-30 | 国网山东省电力公司淄博供电公司 | The high-gain boost converter and its control method that coupling inductance boosting unit is realized |
| CN109698618B (en) * | 2019-01-04 | 2021-02-26 | 国网山东省电力公司淄博供电公司 | High-gain boost converter realized by coupling inductor boost unit and control method thereof |
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