CN206922649U - A kind of double down booster circuit - Google Patents
A kind of double down booster circuit Download PDFInfo
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- CN206922649U CN206922649U CN201720469633.6U CN201720469633U CN206922649U CN 206922649 U CN206922649 U CN 206922649U CN 201720469633 U CN201720469633 U CN 201720469633U CN 206922649 U CN206922649 U CN 206922649U
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- inductance
- buck
- boost
- fly
- afterflows
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Abstract
The utility model discloses a kind of double down booster circuit, including main switch, the first buck-boost BUCK BOOST afterflows branch roads and the 2nd BUCK BOOST afterflow branch roads；The main switch, the first BUCK BOOST afterflows branch roads and the 2nd BUCK BOOST afterflow branch roads are sequentially connected in series between positive input terminal and negative input end；The first BUCK BOOST afterflows branch roads are also connected with the first output end, and the 2nd BUCK BOOST afterflows branch roads are also connected with the second output end；The first BUCK BOOST afterflows branch road includes the first inductance, and the 2nd BUCK BOOST afterflows branch road includes the second inductance；The main switch, first inductance and second inductance are sequentially connected in series between the positive input terminal and the negative input end.The utility model embodiment is applied to three level and staggeredly code converter under wide input voltage range, and it is simple in construction, cost is low.
Description
Technical field
It the utility model is related to electronic technology field, more particularly to a kind of double down-booster circuit.
Background technology
In some occasions, it is necessary to which single busbar dc source is converted into double-bus dc source, i.e. rear class uses three
Level or staggeredly topology.Prior art typically uses double BOOST circuits (double boost choppers) structure as shown in Figure 1, with
Just upper Down Highway balance control is realized within the specific limits.But the structure is Boost topology, due to parts selection, cost, peace
The consideration of rule scheme, being not particularly suited for prime needs decompression-boosting, and rear class uses three level translations or staggeredly DC-DC, DC-AC
Convert occasion.Moreover, the structure has two switching tubes and two magnetic devices, it is complicated.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of double down-booster circuit, suitable for wide input voltage
Three level and interleaved converter of scope, and it is simple in construction, cost is low.
To solve above technical problem, the utility model embodiment provides a kind of double down-booster circuit, including main switch
Pipe, the first BUCK-BOOST afterflows branch road and the 2nd BUCK-BOOST afterflow branch roads；
The main switch, the first BUCK-BOOST afterflows branch road and the 2nd BUCK-BOOST afterflows branch road according to
It is secondary to be connected in series between positive input terminal and negative input end；The first BUCK-BOOST afterflows branch road also connects with the first output end
Connect, the 2nd BUCK-BOOST afterflows branch road is also connected with the second output end.
Further, the first BUCK-BOOST afterflows branch road includes the first inductance, and the 2nd BUCK-BOOST continues
Stream branch road includes the second inductance；The main switch, first inductance and second inductance are sequentially connected in series described
Between positive input terminal and the negative input end.
Further, first inductance and second inductance, which intercouple, forms coupling transformer.
Further, the first BUCK-BOOST afterflows branch road also includes the first fly-wheel diode component and the first electric capacity
Component；
The first end of the main switch is connected to the positive input terminal, and the negative pole of the first fly-wheel diode component connects
The second end of the main switch is connected to, and the positive pole of first fly-wheel diode is connected to via first capacitance component
Branch node, the branch node are the tie point of first inductance and second inductance；First capacitance component
Both ends form first output end.
Further, the 2nd BUCK afterflows branch road also includes the second fly-wheel diode component and the second capacitance component；
The positive pole of the second fly-wheel diode component is connected to the negative input end, and the second fly-wheel diode group
The negative pole of part is connected to branch node via second capacitance component, and the branch node is first inductance and described the
The tie point of two inductance；The both ends of second capacitance component form second output end.
Preferably, the first fly-wheel diode component includes a fly-wheel diode or multiple poles of afterflow two in parallel
Pipe；First capacitance component includes an electric capacity or multiple electric capacity in parallel.
Preferably, the second fly-wheel diode component includes a fly-wheel diode or multiple poles of afterflow two in parallel
Pipe；Second capacitance component includes an electric capacity or multiple electric capacity in parallel.
Preferably, the main switch is following one of any semiconductor devices：
MOSFET, triode, IGBT.
Preferably, the turn ratio of first inductance and second inductance is 1:1.
Double down-booster circuit that the utility model embodiment provides, is continued using a switching tube and two BUCK-BOOST
Branch road is flowed, realizes that the DC voltage of single channel converts to the BUCK-BOOST of double-bus, two outputs is realized in full-load range
The balance of voltage, it is highly suitable for three level of wide input voltage range and staggeredly DC-DC, DC-AC converts occasion, and device
Less, it is simple in construction, cost is low.
Brief description of the drawings
Fig. 1 is the structural representation of double BOOST circuits of the prior art；
Fig. 2 is the structural representation of one embodiment of double down-booster circuit provided by the utility model；
Fundamental diagram when Fig. 3 is the main switch conducting in double down-booster circuit provided by the utility model；
Fundamental diagram when Fig. 4 is the main switch shut-off in double down-booster circuit provided by the utility model；
Fig. 5 is the working waveform figure of double down-booster circuit provided by the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe.
It is the structural representation of one embodiment of double down-booster circuit provided by the utility model referring to Fig. 2.
The present embodiment provides a kind of double down-booster circuit, including main switch Q1, the first BUCK-BOOST afterflows branch road 1
With the 2nd BUCK-BOOST afterflows branch road 2；
The main switch Q1, the first BUCK-BOOST afterflows branch road 1 and the 2nd BUCK-BOOST afterflow branch
Road 2 is sequentially connected in series between positive input terminal Vin+ and negative input end Vin-；The first BUCK-BOOST afterflows branch road 1 is also
It is connected with the first output end vo ut1, the 2nd BUCK-BOOST afterflows branch road 2 is also connected with the second output end vo ut2.
Wherein, the main switch Q1 is the main switch of double down-liter circuit, can be MOSFET (Metal-Oxide-
Semiconductor Field-Effect Transistor, Metal-Oxide Semiconductor field-effect transistor), triode or
The semiconductor devices such as IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor).
It should be noted that the first BUCK-BOOST afterflows branch road and the 2nd BUCK-BOOST afterflow branch roads are connected in series,
Main switch Q1 can be connected at positive input terminal Vin+, be also attached at negative input end Vin-.Input input single channel is straight
Voltage is flowed, main switch Q1 makes the first BUCK-BOOST afterflows branch road and the 2nd BUCK- by switched conductive and off state
BOOST afterflows branch road carries out three level BUCK-BOOST conversion, the equal voltage of output two-way, without it to single channel DC voltage
His circuit and control, realize two-way voltage output self-balancing, three level translations suitable for wide input voltage range and staggeredly DC-
DC, DC-AC etc. convert occasion.
Further, as shown in Fig. 2 the first BUCK-BOOST afterflows branch road 1 includes the first inductance L1, described second
BUCK-BOOST afterflows branch road 2 includes the second inductance L2；The main switch Q1, the first inductance L1 and the second inductance L2 according to
It is secondary to be connected in series between the positive input terminal Vin+ and negative input end Vin-.
Further, the first inductance L1 and the second inductance L2, which intercouples, forms coupling transformer T.
It should be noted that a winding in coupling transformer T is first in the first BUCK-BOOST afterflow branch roads
Another winding in inductance L1, coupling transformer T is the second inductance L2 in the 2nd BUCK-BOOST afterflow branch roads so that this
Double down-booster circuit that utility model is provided only has a magnetic device.Using a switching tube and a magnetic device
Realize that two-way BUCK-BOOST is exported so that the utility model is simple in construction, device is few, cost is low.
Further, the first BUCK-BOOST afterflows branch road 1 also includes the first fly-wheel diode component and the first electricity
Hold component；
The first end of the main switch Q1 is connected to the positive input terminal Vin+, the first fly-wheel diode component
Negative pole is connected to the second end of the main switch Q1, and the positive pole of first fly-wheel diode is via first capacitance group
Part is connected to branch node, and the branch node is the first inductance L1 and the second inductance L2 tie point A；Described
The both ends of one capacitance component form the first output end vo ut1.
Further, the 2nd BUCK afterflows branch road 2 also includes the second fly-wheel diode component and the second capacitance component；
The positive pole of the second fly-wheel diode component is connected to the negative input end Vin-, and the pole of the second afterflow two
The negative pole of tube assembly is connected to branch node via second capacitance component, the branch node be the first inductance L1 and
The tie point A of the second inductance L2；The both ends of second capacitance component form the second output end vo ut2.
Preferably, the first fly-wheel diode component includes a fly-wheel diode or multiple poles of afterflow two in parallel
Pipe；First capacitance component includes an electric capacity or multiple electric capacity in parallel.
Preferably, the second fly-wheel diode component includes a fly-wheel diode or multiple poles of afterflow two in parallel
Pipe；Second capacitance component includes an electric capacity or multiple electric capacity in parallel.
It is preferably carried out at one in mode, as shown in Fig. 2 the first fly-wheel diode component is sustained diode 1, the
One capacitance component is bus capacitor C1, and the second fly-wheel diode component is sustained diode 2, and the second capacitance component is bus electricity
Hold C2, main switch Q1 is connected at positive input terminal Vin+.Wherein, main switch Q1 front end connection positive input terminal Vin+, master
Switching tube Q1 rear end connects the negative pole of sustained diode 1, the first inductance L1 mark end respectively, and sustained diode 1 is just
Pole connection bus capacitor C1 one end, the bus capacitor C1 other end connect the first inductance L1 Same Name of Ends, the second inductance L2's
Mark end connects the first inductance L1 Same Name of Ends, bus capacitor C2 one end, bus capacitor C2 other end connection afterflow respectively
Diode D2 negative pole, the positive pole of sustained diode 2 connect the second inductance L2 Same Name of Ends, negative input end Vin- respectively.Separately
Outside, bus capacitor C1 both ends form the first output end vo ut1, with export all the way voltage to load R1, bus capacitor C2 both ends structure
Into the second output end vo ut2, with export all the way voltage to loading R2.
Preferably, the first inductance L1 and the second inductance L2 turn ratio is 1:1.
It should be noted that it is 1 in the first inductance L1 and the second inductance L2 turn ratio:When 1, no matter two-way output loading
Which kind of ratio R1, R2 size are in, and two-way voltage output is equal, i.e., without other circuits and control, you can realize two-way
Voltage output self-balancing.In addition, can also be needed to adjust the first inductance L1 and the second inductance L2 turn ratio according to reality output,
Two-way voltage output self-balancing is realized in full-load range.
Below using transformer T turn ratio as 1:1, and exemplified by load R1, R2 unequal (R1 ＜ R2), to the utility model
The operation principle of the double down-liter circuit provided illustrates.
In t0 to the t1 stages, main switch Q1 conductings, as shown in Figure 3 and Figure 5, and transformer T two windings, i.e., the first electricity
Feel L1 and the second inductance L2 series connection in circuit, in charged state, now the first inductance L1 and the second inductance L2 electric current phase
Deng, direction is identical, and sustained diode 1, D2 are in cut-off state, load R1, R2 energy entirely from output bus capacitor C1,
C2, due to R1 ＜ R2, then Vout1 ＜ Vout2.
At the t1 moment, main switch Q1 shut-offs, as shown in Figure 4 and Figure 5, the first BUCK-BOOST afterflows branch road and second
BUCK-BOOST afterflows branch road forms two continuous current circuits, and due to Vout1 ＜ Vout2, electric current main transformer T flows through first
Inductance L1, Vout1 increase rapidly, and Vout2 reduces rapidly, when Vout1 and Vout2 pressure difference is less than leakage inductance and line impedance partial pressure
When, the first inductance L1 electric currents reduce, and the increase of the second inductance L2 electric currents, at the t2 moment, the second inductance L2 electric current reaches maximum.
Because transformer T energy persistently reduces, the first inductance L1 and the second inductance L2 electric current all reduce after the t2 moment, in this mistake
Cheng Zhong, without other controls, Vout1 and Vout2 realize self-balancing.At the t3 moment, main switch Q1 is turned on again, with the t0 moment
Operation principle is identical, will not be repeated here.
It should be noted that due to flowing only through transformer T in main switch Q1 conducting phase electric currents, without flow through output bus
Electric capacity C1, C2 and load R1, R2, the flow direction of electric current depends on output voltage Vout1 and Vout2 after main switch Q1 shut-offs, i.e.,
No matter which kind of ratio is R1 and R2 size is under, and Vout1 and Vout2 can obtain balance.Adjust transformer T two windings
The L1 and L2 turn ratio, you can obtain a variety of required voltages.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the scope of protection of the utility model.
Claims (8)
1. a kind of double down-booster circuit, it is characterised in that including main switch, the first buck-boost BUCK-BOOST afterflow branch
Road and the 2nd BUCK-BOOST afterflow branch roads；
The main switch, the first BUCK-BOOST afterflows branch road and the 2nd BUCK-BOOST afterflow branch roads are gone here and there successively
Connection is connected between positive input terminal and negative input end；The first BUCK-BOOST afterflows branch road is also connected with the first output end,
The 2nd BUCK-BOOST afterflows branch road is also connected with the second output end；
The first BUCK-BOOST afterflows branch road includes the first inductance, and the 2nd BUCK-BOOST afterflows branch road includes second
Inductance；The main switch, first inductance and second inductance are sequentially connected in series in the positive input terminal and described
Between negative input end.
2. double down-booster circuit as claimed in claim 1, it is characterised in that first inductance and the second inductance phase
Mutual coupling forms coupling transformer.
3. double down-booster circuit as claimed in claim 2, it is characterised in that the first BUCK-BOOST afterflows branch road is also
Including the first fly-wheel diode component and the first capacitance component；
The first end of the main switch is connected to the positive input terminal, and the negative pole of the first fly-wheel diode component is connected to
Second end of the main switch, and the positive pole of first fly-wheel diode is connected to branch road via first capacitance component
Node, the branch node are the tie point of first inductance and second inductance；The both ends of first capacitance component
Form first output end.
4. double down-booster circuit as claimed in claim 2, it is characterised in that the 2nd BUCK afterflows branch road also includes the
Two fly-wheel diode components and the second capacitance component；
The positive pole of the second fly-wheel diode component is connected to the negative input end, and the second fly-wheel diode component
Negative pole is connected to branch node via second capacitance component, and the branch node is first inductance and second electricity
The tie point of sense；The both ends of second capacitance component form second output end.
5. double down-booster circuit as claimed in claim 3, it is characterised in that the first fly-wheel diode component includes one
Individual fly-wheel diode or multiple fly-wheel diodes in parallel；First capacitance component includes an electric capacity or multiple electricity in parallel
Hold.
6. double down-booster circuit as claimed in claim 4, it is characterised in that the second fly-wheel diode component includes one
Individual fly-wheel diode or multiple fly-wheel diodes in parallel；Second capacitance component includes an electric capacity or multiple electricity in parallel
Hold.
7. double down-booster circuit as claimed in claim 1, it is characterised in that the main switch is following one of any
Semiconductor devices：
Mos field effect transistor MOSFET, triode, insulated gate bipolar transistor IGBT.
8. double down-booster circuit as claimed in claim 1, it is characterised in that first inductance and second inductance
Turn ratio is 1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720469633.6U CN206922649U (en) | 2017-04-28 | 2017-04-28 | A kind of double down booster circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720469633.6U CN206922649U (en) | 2017-04-28 | 2017-04-28 | A kind of double down booster circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206922649U true CN206922649U (en) | 2018-01-23 |
Family
ID=61306657
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720469633.6U Active CN206922649U (en) | 2017-04-28 | 2017-04-28 | A kind of double down booster circuit |
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| Country | Link |
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| CN (1) | CN206922649U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654183A (en) * | 2020-06-12 | 2020-09-11 | 深圳英飞源技术有限公司 | DC-DC conversion device and control method thereof |
| CN114204801A (en) * | 2021-11-16 | 2022-03-18 | 深圳技术大学 | BUCK circuit |
| CN114204808A (en) * | 2021-11-17 | 2022-03-18 | 深圳技术大学 | BUCK voltage reduction circuit |
-
2017
- 2017-04-28 CN CN201720469633.6U patent/CN206922649U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654183A (en) * | 2020-06-12 | 2020-09-11 | 深圳英飞源技术有限公司 | DC-DC conversion device and control method thereof |
| CN114204801A (en) * | 2021-11-16 | 2022-03-18 | 深圳技术大学 | BUCK circuit |
| CN114204808A (en) * | 2021-11-17 | 2022-03-18 | 深圳技术大学 | BUCK voltage reduction circuit |
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Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |