CN207368879U - 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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- CN207368879U CN207368879U CN201720582628.6U CN201720582628U CN207368879U CN 207368879 U CN207368879 U CN 207368879U CN 201720582628 U CN201720582628 U CN 201720582628U CN 207368879 U CN207368879 U CN 207368879U
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- diode
- switch pipe
- capacitance
- gain
- inductance
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Abstract
The utility model 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, capacitance, the 3rd diode, second switch pipe, output capacitance and load.The cathode of first diode and the source electrode of the anode of direct-current input power supplying and first switch pipe connect.The cathode of the direct-current input power supplying is connected with the anode of the 3rd diode and one end of inductance.The other end of the inductance is connected with the drain electrode of the anode and second switch pipe of the second diode.The cathode of second diode is connected with the drain electrode of first switch pipe and one end of capacitance.The other end of the capacitance 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 utility model is simple in structure, has higher steady-state gain, suitable for non-isolation type high-gain DC voltage transformation occasion.
Description
Technical field
It the utility model is related to DC/DC converters field, and in particular to a kind of quasi- switch of the high-gain of low voltage stress rises
Press DC/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 can be generated electricity with clean energy resourcies such as fuel cells is generally relatively low, cannot be used directly for inversion grid connection or some high
The load supplying of voltage class.Low output voltage is carried out lifting by the DC/DC converters therefore, it is necessary to high-gain.It is and traditional
Boost because simple in structure be commonly used for booster circuit, but to realize high-gain, the duty cycle 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 improves much, but Z sources therein and quasi- Z source networks contain two inductance and capacitance causes 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 a capacitance, it is possible to realize the identical boost capability with tradition Z source networks, and quasi- boost switching network is used for 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.
Utility model content
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, propose a kind of high-gain of low voltage stress
Quasi- boost switching DC/DC converters, concrete technical scheme are as follows.
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, capacitance, the 3rd diode, second switch pipe, output capacitance and load；Institute
State the cathode of the first diode and the source electrode of the anode of direct-current input power supplying and first switch pipe connects；The direct-current input power supplying
Cathode 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 cathode of second diode is connected with the drain electrode of first switch pipe and one end of capacitance；
The anode of the other end of the capacitance and the first diode, the source electrode of second switch pipe, the one of one end of output capacitance and load
End connection；The cathode of the other end of the output capacitance and the 3rd diode is connected with the other end of load.
The converter stable state export when voltage gain G be：
Wherein VoRepresent the output voltage of converter load-side, ViFor input dc power potential source, D
For duty cycle.
The utility model has the following advantages that compared with prior art：Converted compared to traditional Z sources, quasi- Z sources DC/DC
Device, has lacked one group of inductance capacitor element, and more a switching tube and diodes, component number sum is identical, and relative volume is more
It is small；In addition in the case of identical duty cycle and input voltage, there is the output voltage of higher.I.e. identical input voltage and
Under the conditions of output voltage, it is high-grade that the utility model circuit only needs less duty cycle to rise to low step voltage
Voltage, and it is simple in structure, and two switching tube synchronization actions, easy to control, the voltage stress of switching tube and diode is small, work
It is efficient, thus the utility model circuit have be widely applied very much prospect.
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 that converter described in the example of the utility model increases with Z sources DC/DC converters and the voltage of Boost
Beneficial Vo/ViThe comparison figure changed with duty cycle D.
Fig. 5 is the MATLAB/simulink emulation of the utility model circuit correlated variables of steady operation in D=0.4
Oscillogram.
Embodiment
With reference to embodiments and attached drawing is described in further detail the utility model explanation, but the utility model
Embodiment not limited to this.It is noted that if the following process or parameter for having not special detailed description, is art technology
Personnel can refer to the prior art understand or realize.
The Basic Topological of this example and each main element voltage and 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, capacitance 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 Vi, output voltage Vo, electricity
Appearance voltage is VC, inductive current iL, first, second diode current be iD1、iD2, the 3rd diode voltage be VD3.Setting the
First, duty cycle when second switch pipe turns on is D, sets output voltage gain as G, 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：
1 (t of operation mode0~t1)：As shown in Figure 3a, first, second switching tube synchronization action, its driving voltage VgFrom low
Level is changed into high level, and first, second 2 switching tubes simultaneously turn on, and first, second diode, which bears backward voltage, to be ended, and the 3rd
Diode bears forward voltage conducting, direct-current input power supplying and capacitance by first, second switching tube to induction charging, leads at the same time
The 3rd diode is crossed to output capacitance and load supplying.
2 (t of operation mode0~t1)：As shown in Figure 3b, first, second switching tube synchronization action, its driving voltage VgFrom height
Level is changed into low level, and first, second switching tube simultaneously turns off, and first, second diode bears forward voltage and turns on, and the three or two
Pole pipe bears backward voltage cut-off, direct-current input power supplying and inductance and is charged by first, second diode to capacitance, passes through at the same time
3rd diode is to output capacitance and load supplying.
Analyzed more than, with voltage-second balance principle, i.e. average value of the inductive drop in a switch periods is zero,
Therefore formula (1) is obtained, input voltage V is obtained by formula (1)iWith capacitance voltage VCRelational expression (2).It is defeated in the section of switching tube conducting
Go out voltage VoEqual to input voltage ViWith capacitance voltage VCThe sum of, 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)
A kind of then quasi- boost switching DC/DC converters stable state output of the high-gain of low voltage stress described in the utility model
When voltage gain G be：
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)
Duty cycle), this example circuit compared with Boost and the steady-state gain of Z sources DC/DC converters figure as shown in figure 4, by scheming
Understand, in the case where duty cycle D is not equal to or greater than 0.5, output voltage gain G can reach very the utility model circuit
Greatly, hence it is evident that higher than the voltage gain of other two kinds of converters, and the example of the utility model only contains an inductance and capacitance, body
Product is relatively small, simple in structure.Additionally, due to the switching tube synchronization action of the example of the utility model, it is only necessary to which driving can all the way
With control.
With ViExemplified by=10V, duty cycle D=0.4, the simulation result of correlated variables in the utility model circuit is given such as
Shown in Fig. 5.During D=0.4, corresponding output voltage gain G=6, capacitance voltage VC=50V, output voltage Vo=60V, switching tube
Voltage stress VS1=VS2=50V, diode voltage stress VD1=VD2=VD3=50V.
In conclusion the utility model proposes a kind of low voltage stress the quasi- boost switching DC/DC converters of high-gain,
Simple in structure, control is simple, has higher steady-state gain, the voltage gain of switchgear is below output voltage, is suitable for
Non-isolation type high-gain DC voltage transformation occasion.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiment of the utility model and from described
The limitation of embodiment, it is other it is any for made under the Spirit Essence of the utility model and principle change, modify, replace
Generation, combination, simplify, and should be equivalent substitute mode, is included within the scope of protection of the utility model.
Claims (2)
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
（D 1）, first switch pipe（S 1）, direct-current input power supplying（V in）, inductance（L）, the second diode（D 2）, capacitance（C）, the 3rd diode
（D 3）, second switch pipe（S 2）, output capacitance（C o）And load（R L）；First diode（D 1）Cathode and direct current input electricity
Source（V in）Anode and first switch pipe（S 1）Source electrode connection；The direct-current input power supplying（V in）Cathode and the 3rd diode
（D 3）Anode and inductance（L）One end connection；The inductance（L）The other end and the second diode（D 2）Anode and second
Switching tube（S 2）Drain electrode connection；Second diode（D 2）Cathode and first switch pipe（S 1）Drain electrode and capacitance（C）'s
One end connects；The capacitance（C）The other end and the first diode（D 1）Anode, second switch pipe（S 2）Source electrode, output electricity
Hold（C o）One end and load（R L）One end connection；The output capacitance（C o）The other end and the 3rd diode（D 3）The moon
Pole and load（R L）The other end connection.
2. a kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress according to claim 1, it is main special
Sign is that the first diode, the second diode bear backward voltage and cut when first switch pipe, the two or two switching tube simultaneously turn on
Only, the 3rd diode bears forward voltage conducting, direct-current input power supplying and capacitance by first switch pipe, second switch pipe to electricity
Sense charging, while by the 3rd diode to output capacitance and load supplying；When first switch pipe, second switch pipe close at the same time
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 capacitance to charge by the first diode, the second diode, at the same by the 3rd diode to output capacitance and
Load supplying.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720582628.6U CN207368879U (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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| CN201720582628.6U CN207368879U (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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104596A (en) * | 2017-05-24 | 2017-08-29 | 华南理工大学 | A kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress |
| CN109217670A (en) * | 2018-10-18 | 2019-01-15 | 广东工业大学 | A kind of new energy resources system and its source Z DC-DC converter |
| CN111130349A (en) * | 2020-01-15 | 2020-05-08 | 广东工业大学 | H-bridge high-gain boost converter and switching power supply |
-
2017
- 2017-05-24 CN CN201720582628.6U patent/CN207368879U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104596A (en) * | 2017-05-24 | 2017-08-29 | 华南理工大学 | A kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress |
| CN109217670A (en) * | 2018-10-18 | 2019-01-15 | 广东工业大学 | A kind of new energy resources system and its source Z DC-DC converter |
| CN111130349A (en) * | 2020-01-15 | 2020-05-08 | 广东工业大学 | H-bridge high-gain boost converter and switching power supply |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |