CN107104596A - A kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress - Google Patents
A kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress Download PDFInfo
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- CN107104596A CN107104596A CN201710371907.2A CN201710371907A CN107104596A CN 107104596 A CN107104596 A CN 107104596A CN 201710371907 A CN201710371907 A CN 201710371907A CN 107104596 A CN107104596 A CN 107104596A
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- diode
- switch pipe
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- voltage
- electric capacity
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress, including the first diode, first switch pipe, direct-current input power supplying, inductance, the second diode, electric capacity, the 3rd diode, second switch pipe, output capacitance and load.The described negative electrode of the first diode and the source electrode of the negative pole of direct-current input power supplying and first switch pipe are connected.The positive pole of described direct-current input power supplying is connected with the anode of the 3rd diode and one end of inductance.The other end of described inductance is connected with the drain electrode of the anode and second switch pipe of the second diode.The negative electrode of the second described diode is connected with the drain electrode of first switch pipe and one end of electric capacity.The other end of the electric capacity is connected with the anode of the first diode, the source electrode of second switch pipe, one end of output capacitance and one end of load.The present invention is simple in construction, with higher steady-state gain, it is adaptable to non-isolation type high-gain DC voltage transformation occasion.
Description
Technical field
The present invention relates to DC/DC converters field, and in particular to a kind of quasi- boost switching DC/ of the high-gain of low voltage stress
DC converters.
Background technology
As energy efficiency is increasingly taken seriously, generation of electricity by new energy achieves significant progress, but as solar energy, wind
The output DC voltage that the clean energy resource such as energy and fuel cell generates electricity is typically relatively low, it is impossible to be directly used in inversion grid connection or some high
The load supplying of voltage class.Accordingly, it would be desirable to which low output voltage is carried out lifting by the DC/DC converters of high-gain.And it is traditional
Boost because simple in construction be commonly used for booster circuit, but to realize high-gain, the dutycycle of its switching tube is often
Larger, this is unfavorable for the raising of the energy conversion efficiency of system, and the proposition of Z sources/quasi- Z sources DC/DC converters, really will input
Output voltage gain is improved much, but Z sources therein and quasi- Z source networks contain two inductance and electric capacity so that the body of circuit
Product is larger, is unfavorable for the miniaturization and lightweight of system.And the quasi- boost switching network proposed in recent years, only containing an inductance
With an electric capacity, it is possible to realize the identical boost capability with tradition Z source networks, and quasi- boost switching network is used for into DC-
In DC circuits, appropriate transformation is carried out to it, not only its boost capability can be made further to be lifted, and switchgear
Voltage stress also can further reduce.
The content of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, propose that a kind of high-gain standard of low voltage stress is opened
Close boosting DC/DC converters, concrete technical scheme.
A kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress, including the first diode, first switch
Pipe, direct-current input power supplying, inductance, the second diode, electric capacity, the 3rd diode, second switch pipe, output capacitance and load；Institute
The source electrode for stating the negative electrode of the first diode and the negative pole of direct-current input power supplying and first switch pipe is connected；The direct-current input power supplying
Positive pole be connected with the anode of the 3rd diode and one end of inductance；The anode of the other end of the inductance and the second diode and
The drain electrode connection of second switch pipe；The negative electrode of second diode is connected with the drain electrode of first switch pipe and one end of electric capacity；
The anode of the other end of the electric capacity and the first diode, the source electrode of second switch pipe, the one of one end of output capacitance and load
End connection；The negative electrode of the other end of the output capacitance and the 3rd diode and the other end connection of load.The converter stable state
Voltage gain G during output is：
Wherein VoRepresent the output voltage of converter load-side, ViFor input dc power potential source, D is
Dutycycle.
Compared with prior art the invention has the advantages that：It is few compared to traditional Z sources, quasi- Z sources DC/DC converters
One group of inductance capacitor element a, many switching tube and diodes, component number sum is identical, and relative volume is smaller；Separately
In the case of external identical dutycycle and input voltage, with higher output voltage.That is identical input voltage and output
Under voltage conditions, circuit of the present invention, which only needs to less dutycycle, can just rise to low step voltage high-grade voltage, and
And simple in construction, two switching tube synchronization actions, easy to control, the voltage stress of switching tube and diode is small, and operating efficiency is high,
Therefore circuit of the present invention has is widely applied prospect very much.
Brief description of the drawings
Fig. 1 is a kind of quasi- boost switching DC/DC converter circuit figures of high-gain of low voltage stress.
Fig. 2 is the voltage and current waveform of a switch periods main element.
Fig. 3 a, Fig. 3 b be circuit shown in Fig. 1 simultaneously turn on respectively in first switch pipe and second switch pipe, first switch pipe
When being simultaneously turned off with second switch pipe, the circuit modal graph in a switch periods.
Fig. 4 is converter described in present example and Z sources DC/DC converters and the voltage gain V of Boosto/
ViThe comparison figure changed with dutycycle D.
Fig. 5 is the MATLAB/simulink simulation waveforms of circuit of the present invention correlated variables of steady operation in D=0.4
Figure.
Embodiment
With reference to embodiments and accompanying drawing the present invention is described in further detail explanation, but embodiments of the present invention
Not limited to this.If being that those skilled in the art can join it is noted that having the process or parameter of not special detailed description below
According to prior art understand or realize.
The Basic Topological of this example and each main element voltage x current reference direction are as shown in Figure 1.For the side of analysis
Just, the device in circuit structure is accordingly to be regarded as ideal component.A kind of quasi- boost switching DC/DC conversion of the high-gain of low voltage stress
Device, it includes the first diode D1, first switch pipe S1, direct-current input power supplying Vin, inductance L, the second diode D2, electric capacity C,
Three diode D3, second switch pipe S2, output capacitance CoWith load RL。
The drive signal of first, second switching tube is set in this example as Vg, input voltage be Vi, output voltage be Vo, electricity
Appearance voltage is VC, inductive current be iL, first, second diode current be iD1、iD2, the 3rd diode voltage be VD3.Setting the
First, dutycycle when second switch pipe is turned on is D, sets output voltage gain as G, and the configuration switch cycle is Ts.Oscillogram is such as
Shown in Fig. 2.
A kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress, in a switch periods (t0~t2) in not
With 2 operation modes in stage, it is described as follows respectively：
(the t of operation mode 10~t1)：As shown in Figure 3 a, first, second switching tube synchronization action, its driving voltage VgFrom low
Level is changed into high level, and first, second 2 switching tubes are simultaneously turned on, and first, second diode bears backward voltage cut-off, the 3rd
Diode bears forward voltage conducting, and direct-current input power supplying and electric capacity, to induction charging, are led to simultaneously by first, second switching tube
The 3rd diode is crossed to output capacitance and load supplying.
(the t of operation mode 20~t1)：As shown in Figure 3 b, first, second switching tube synchronization action, its driving voltage VgFrom height
Level is changed into low level, and first, second switching tube is simultaneously turned off, and first, second diode bears forward voltage conducting, the three or two
Pole pipe bears backward voltage cut-off, and direct-current input power supplying and inductance are charged to electric capacity by first, second diode, passed through simultaneously
3rd diode is to output capacitance and load supplying.
Analyzed more than, be zero with the average value of voltage-second balance principle, i.e. inductive drop in a switch periods,
Therefore formula (1) is obtained, input voltage V is obtained by formula (1)iWith capacitance voltage VCRelational expression (2).The interval turned in switching tube, it is defeated
Go out voltage VoEqual to input voltage ViWith capacitance voltage VCSum, so can further obtain output voltage according to relational expression (2)
VoWith input voltage VinRelational expression be formula (3).
(VC+Vi)D+(Vi-VC) (1-D)=0 (1)
When then a kind of quasi- boost switching DC/DC converters stable state of the high-gain of low voltage stress of the present invention is exported
Voltage gain G is：
Boost and the steady-state gain of Z sources DC/DC converters are respectively that (D is by 1/ (1-D) and (1-D)/(1-2D)
Dutycycle), this example circuit is compared figure as shown in figure 4, by scheming with the steady-state gain of Boost and Z sources DC/DC converters
Understand, circuit of the present invention is not equal to or greater than in the case of 0.5 in dutycycle D, output voltage gain G can just reach very greatly,
Apparently higher than the voltage gain of other two kinds of converters, and present example only contains an inductance and electric capacity, and volume is relative
It is smaller, it is simple in construction.Additionally, due to the switching tube synchronization action of present example, it is only necessary to which driving can just control all the way.
With ViExemplified by=10V, dutycycle D=0.4, simulation result such as Fig. 5 of correlated variables in circuit of the present invention is given
It is shown.During D=0.4, corresponding output voltage gain G=6, capacitance voltage VC=50V, output voltage Vo=60V, switching tube electricity
Compression VS1=VS2=50V, diode voltage stress VD1=VD2=VD3=50V.
In summary, a kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress proposed by the present invention, structure
Simply, control simple, with higher steady-state gain, the voltage gain of switchgear is below output voltage, it is adaptable to it is non-every
Release high-gain DC voltage transformation occasion.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by the embodiment of the invention
Limitation, it is other it is any be Spirit Essence and the change made under principle away from the present invention, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (3)
1. a kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress, it is characterised in that including the first diode
(D1), first switch pipe (S1), direct-current input power supplying (Vin), inductance (L), the second diode (D2), electric capacity (C), the 3rd diode
(D3), second switch pipe (S2), output capacitance (Co) and load (RL)；First diode (the D1) negative electrode and direct current input electricity
Source (Vin) negative pole and first switch pipe (S1) source electrode connection；Direct-current input power supplying (the Vin) positive pole and the 3rd diode
(D3) anode and inductance (L) one end connection；The other end and the second diode (D of the inductance (L)2) anode and second
Switching tube (S2) drain electrode connection；Second diode (the D2) negative electrode and first switch pipe (S1) drain electrode and electric capacity (C)
One end is connected；The other end and the first diode (D of the electric capacity (C)1) anode, second switch pipe (S2) source electrode, output electricity
Hold (Co) one end and load (RL) one end connection；Output capacitance (the Co) the other end and the 3rd diode (D3) the moon
Pole and load (RL) the other end connection.
2. requiring a kind of quasi- boost switching DC/DC converters of high-gain of described low voltage stress according to right 1, it is main special
Levy and be that the first diode, the second diode bear backward voltage and cut when first switch pipe, the two or two switching tube are simultaneously turned on
Only, the 3rd diode bears forward voltage conducting, and direct-current input power supplying and electric capacity give electricity by first switch pipe, second switch pipe
Sense charging, while by the 3rd diode to output capacitance and load supplying；When simultaneously first switch pipe, second switch pipe are closed
Disconnected, the first diode, the second diode bear forward voltage conducting, and the 3rd diode bears backward voltage cut-off, direct current input
Power supply and inductance give electric capacity to charge by the first diode, the second diode, at the same by the 3rd diode to output capacitance and
Load supplying.
3. requiring a kind of quasi- boost switching DC/DC converters of high-gain of described low voltage stress according to right 1, its feature exists
Voltage gain G when stable state is exported is：
Wherein VoRepresent the output voltage of converter load-side, ViFor input dc power potential source, D is duty
Than.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710371907.2A CN107104596A (en) | 2017-05-24 | 2017-05-24 | A kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923652A (en) * | 2018-08-24 | 2018-11-30 | 广东工业大学 | A kind of high-gain biswitch DC-DC converter |
| CN109889037A (en) * | 2017-12-06 | 2019-06-14 | 群光电能科技股份有限公司 | The circuit structure of switched-mode power supply |
| CN110635684A (en) * | 2019-09-09 | 2019-12-31 | 南通大学 | Single-tube quasi-Z-source Boost converter |
| CN111162672A (en) * | 2020-01-15 | 2020-05-15 | 广东工业大学 | DC-DC converter based on X-type switch network and switch power supply |
| CN115664201A (en) * | 2022-10-27 | 2023-01-31 | 江苏韩娜新能源有限公司 | High-gain low-loss Boost converter and power supply system thereof |
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| CN105450020A (en) * | 2015-05-01 | 2016-03-30 | 华南理工大学 | Common-ground high-gain Z source boost converter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889037A (en) * | 2017-12-06 | 2019-06-14 | 群光电能科技股份有限公司 | The circuit structure of switched-mode power supply |
| CN108923652A (en) * | 2018-08-24 | 2018-11-30 | 广东工业大学 | A kind of high-gain biswitch DC-DC converter |
| CN110635684A (en) * | 2019-09-09 | 2019-12-31 | 南通大学 | Single-tube quasi-Z-source Boost converter |
| CN111162672A (en) * | 2020-01-15 | 2020-05-15 | 广东工业大学 | DC-DC converter based on X-type switch network and switch power supply |
| CN111162672B (en) * | 2020-01-15 | 2021-04-16 | 广东工业大学 | DC-DC converter based on X-type switch network and switch power supply |
| CN115664201A (en) * | 2022-10-27 | 2023-01-31 | 江苏韩娜新能源有限公司 | High-gain low-loss Boost converter and power supply system thereof |
| CN115664201B (en) * | 2022-10-27 | 2023-10-24 | 国网浙江省电力有限公司杭州市临安区供电公司 | Boost converter with high gain and low loss and power supply system thereof |
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Application publication date: 20170829 |