CN203590025U - Single-switch high-gain boost converter - Google Patents
Single-switch high-gain boost converter Download PDFInfo
- Publication number
- CN203590025U CN203590025U CN201320575151.0U CN201320575151U CN203590025U CN 203590025 U CN203590025 U CN 203590025U CN 201320575151 U CN201320575151 U CN 201320575151U CN 203590025 U CN203590025 U CN 203590025U
- Authority
- CN
- China
- Prior art keywords
- diode
- inductance
- electric capacity
- capacitor
- boost converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model provides a single-switch high-gain boost converter. The boost converter mainly comprises an ordinary Boost circuit link and an energy storage circuit link, wherein the ordinary Boost circuit link is formed by a direct-current voltage source, a first inductor, a fourth diode, a fourth capacitor and an output load, and the energy storage circuit link is formed by a first diode, a second diode, a third diode, a first capacitor, a second capacitor, a third capacitor, a second inductor and a third inductor. According to the utility model, the single-switch high-gain boost converter is simple in structure, and has a larger voltage gain with the same duty ratio compared with a conventional direct-current boost converter; a switch tube bears a relative low switch stress while being turned off; the circuit is controlled to work by only one switch tube, such that single-switch high-gain boost converter is simple in control, and suitable for direct-current voltage conversion applications requiring high voltage gains.
Description
Technical field
The utility model relates to converters technical field, is specifically related to a kind of single switch high gain boost converter.
Background technology
In solar power system or fuel cell system, what provide due to monolithic solar cell or single fuel cell is all the direct current that voltage is lower, can not meet the need for electricity of existing power consumption equipment, can not meet grid-connected requirement, therefore need low voltage and direct current to be converted to the high voltage direct current of actual needs.Thereby the booster converter of high-gain, stable performance becomes a study hotspot, this research has a very big significance the development that promotes photovoltaic, fuel cell industry.
The most basic booster converter is single tube Boost converter, but the scope of boosting of this converter is very limited, is difficult to meet the conversion requirement of high-gain.At present, single boost switching converter of high-gain mainly contains three kinds.The first is to utilize transformer, adds the transformer of a high frequency in the middle of original DC-DC converter, realizes the object of high gain boost by changing transformer voltage ratio.Now, in fact the conversion process of electric energy by original DC-to-DC, becomes DC-AC-AC-DC, and the energy conversion efficiency of whole system reduces.The second is to utilize coupling inductance, but coupling inductance complex structure is unfavorable for industrial processes, is difficult to guarantee the consistency of circuit, and can cause that switching device voltage stress is too high, brings the impacts such as electromagnetic interference, causes converter working loss larger.The third is to add cascade boosting unit, and unit number is more, and voltage gain is larger, but circuit elements number of packages is more, and structure is more complicated.
Utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of single switch high gain boost converter is provided.
The utility model is applicable to photovoltaic system, fuel cell system, energy-recuperation system etc. need to use the occasion of high-gain high-performance electric power electronic converter.
The utility model is achieved through the following technical solutions:
A kind of single switch high gain boost converter, comprises common Boost booster circuit link, accumulator link.
Described common Boost booster circuit link comprises direct voltage source, the first inductance, the 4th diode, the 4th electric capacity and output loading; Accumulator link comprises the first diode, the second diode, the 3rd diode, the first electric capacity, the second electric capacity, the 3rd electric capacity, the second inductance and the 3rd inductance.
Described first inductance one end is connected with the positive pole of direct voltage source, the other end respectively with the anode of the first diode, the anodic bonding of the second diode;
The negative electrode of the second described diode respectively with the drain electrode of switching tube, one end, one end of the 3rd inductance and the anodic bonding of the 4th diode of the second electric capacity;
The other end of the second described electric capacity is connected with the anode of the 3rd diode, one end of the second inductance respectively;
The other end of the 3rd described inductance respectively with one end of the 3rd electric capacity, the negative electrode of the 3rd diode connects;
The other end of the second described inductance is connected with one end of the first electric capacity and the negative electrode of the first diode respectively;
The other end of the first described electric capacity is connected with one end, one end of load, the switching tube source electrode of direct voltage source negative pole, the 3rd electric capacity other end, the 4th electric capacity respectively;
The negative electrode of the 4th described diode is connected with the 4th other end of electric capacity and the other end of load respectively.
Compared with prior art the utlity model has following advantage:
The utility model is simple in structure, compared with existing DC boosting code converter, in the situation that duty ratio is identical, has larger voltage gain; The switch stress that switching tube bears while turn-offing is lower; Only, with the work of a switch controlled circuit, control simply, be applicable to need the DC voltage conversion occasion of high voltage gain.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of single switch high gain boost converter of the utility model enforcement;
Fig. 2, Fig. 3 and Fig. 4 are respectively the operation mode figure of the embodiment of the utility model shown in Fig. 1 circuit in a switch periods.Operation mode figure when wherein Fig. 2 is switching tube S conducting, two kinds of operation mode figure when Fig. 3, Fig. 4 are switching tube S shutoff.In figure, solid line represents the part that has electric current to flow through in converter, and dotted line represents the part that does not have electric current to flow through in converter.
Fig. 5 is respectively that the utility model embodiment is at input voltage V
g=12V, the duty ratio D=0.4 of switch S, load R
loutput voltage V during=50 Ω
o, switching tube both end voltage V
ds, flow through diode (D
1, D
2, D
3, D
4) oscillogram of electric current.
Fig. 6 is the output voltage gain M of the utility model embodiment circuit under duty ratio (0<D<0.5) and the graph of a relation of switching tube S duty ratio D.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
As shown in Figure 1, a kind of single switch high gain boost converter comprises common Boost booster circuit link, accumulator link.
Described common Boost booster circuit link comprises direct voltage source V
g, the first inductance L
1, the 4th diode D
4, the 4th capacitor C
4with output loading R
l; Accumulator link comprises the first diode D
1, the second diode D
2, the 3rd diode D
3, the first capacitor C
1, the second capacitor C
2, the 3rd capacitor C
3, the second inductance L
2with the 3rd inductance L
3.
Concrete connected mode:
Described the first inductance L
1one end is connected with the positive pole of direct voltage source, the other end respectively with the first diode D
1anode, the anodic bonding of the second diode D2;
The second described diode D
2negative electrode respectively with drain electrode, the second capacitor C of switching tube S
1one end, the 3rd inductance L
3one end and the 4th diode D
4anodic bonding;
The second described capacitor C
1the other end respectively with the 3rd diode D
3anode, the second inductance L
2one end connect;
The 3rd described inductance L
3the other end respectively with the 3rd capacitor C
3one end, the 3rd diode C
3negative electrode connect;
The second described inductance L
2the other end respectively with the first capacitor C
2one end and the first diode D
1negative electrode connect;
The first described capacitor C
2the other end respectively with direct voltage source negative pole, the 3rd capacitor C
3the other end, the 4th capacitor C
4one end, load R
lone end, switching tube S source electrode connect;
The 4th described diode D
4negative electrode respectively with the 4th capacitor C
4the other end and load R
lthe other end connect.
The utility model is only analyzed the embodiment of continuous current mode in circuit.
Operation mode 1:
As shown in Figure 2, switching tube S conducting, the duty ratio of establishing switching tube S is D.The second diode D
2conducting, the first inductance L
1electric current increases, the first capacitor C
1, the second capacitor C
2, the 3rd capacitor C
3, the 4th capacitor C
4electric discharge, the second inductance L
2, the 3rd inductance L
3electric current also increases.This stage first inductance L
1, the second inductance L
2, the 3rd inductance L
3the voltage V that bear at two ends
l1, V
l2, V
l3be respectively:
V
L1＝V
g （1）
V
L2＝V
c1+V
c2 （2）
V
L3＝V
c3 （3）
Wherein, V
gfor input supply voltage, V
c1, V
c2, V
c3, V
l1, V
l2, V
l3represent respectively the first capacitor C
1, the second capacitor C
2, the 3rd capacitor C
3, the first inductance L
1, the second inductance L
2with the 3rd inductance L
3the voltage at two ends.
Operation mode 2:
As shown in Figure 3, switching tube S turn-offs, the 4th diode D
4not yet conducting, the first inductance L
1, the second inductance L
2, the 3rd inductance L
3electric current reduces, the 4th capacitor C
4continue electric discharge, the first capacitor C
1, the second capacitor C
2, the 3rd capacitor C
3charging.This stage first inductance L
1, the second inductance L
2, the 3rd inductance L
3the voltage V that bear at two ends
l1, V
l2, V
l3be respectively:
V
L1＝V
g-V
c2 （4）
V
L2＝V
c2-V
c3 （5）
V
L3＝V
c1 （6）
Operation mode 3:
As shown in Figure 4, switching tube S turn-offs, the 4th diode D
4conducting.Work as V
c3+ V
c1>V
c4time, circuit enters operation mode 3.The first inductance L
1, the second inductance L
2, the 3rd inductance L
3electric current continues to reduce, the first capacitor C
1, the second capacitor C
2, the 3rd capacitor C
3, the 4th capacitor C
4charging.This stage first inductance L
1, the second inductance L
2, the 3rd inductance L
3the voltage V that bear at two ends
l1, V
l2, V
l3be respectively formula (4), formula (5), formula (6).
If switching tube S duty ratio is D, according to inductance weber equilibrium response, and simultaneous formula (1)～formula (6) can obtain:
V
g□D+(V
g-V
c2)(1-D)＝0 （7）
(V
c1+V
c2)□D+(V
c2-V
c3)(1-D)＝0 （8）
V
c3□D＝V
c1(1-D) （9）
Simultaneous formula (7)～(8):
Because
V
o＝V
c1+V
c3 （13）
So
The voltage gain M that is a kind of single switch high gain boost converter described in the utility model is:
Fig. 5 is respectively that the utility model embodiment is at input voltage V
g=12V, the duty ratio D=0.4 of switch S, load R
loutput voltage V during=50 Ω
o, switching tube both end voltage V
ds, flow through diode (D
1, D
2, D
3, D
4) current waveform figure, the switch stress bearing when as can be seen from the figure switching tube turn-offs is lower.Fig. 6 is the output voltage gain M of the utility model embodiment circuit under duty ratio (0<D<0.5) and the graph of a relation of switching tube S duty ratio D, and that can find out this utility model circuit can realize very high voltage gain.
The utility model is simple in structure, compared with existing DC boosting code converter, in the situation that duty ratio is identical, has larger voltage gain; The switch stress that switching tube bears while turn-offing is lower; Only, with the work of a switch controlled circuit, control simply, be applicable to need the DC voltage conversion occasion of high voltage gain.
Those skilled in the art can make various modifications to this specific embodiment or supplement or adopt similar mode to substitute under the prerequisite without prejudice to principle of the present utility model and essence, but these changes all fall into protection range of the present utility model.Therefore the utility model technical scope is not limited to above-described embodiment.
Claims (1)
1. a single switch high gain boost converter, is characterized in that comprising common Boost circuit link and accumulator link; Common Boost booster circuit link comprises direct voltage source (V
g), the first inductance (L
1), the 4th diode (D
4), the 4th electric capacity (C
4) and output loading (R
l); Accumulator link comprises the first diode (D
1), the second diode (D
2), the 3rd diode (D
3), the first electric capacity (C
1), the second electric capacity (C
2), the 3rd electric capacity (C
3), the second inductance (L
2) and the 3rd inductance (L
3);
Described the first inductance (L
1) one end is connected with the positive pole of direct voltage source, the other end respectively with the first diode (D
1) anode, the second diode (D
2) anodic bonding;
The second described diode (D
2) negative electrode respectively with drain electrode, the second electric capacity (C of switching tube (S)
1) one end, the 3rd inductance (L
3) one end and the 4th diode (D
4) anodic bonding;
The second described electric capacity (C
1) the other end respectively with the 3rd diode (D
3) anode, the second inductance (L
2) one end connect;
The 3rd described inductance (L
3) the other end respectively with the 3rd electric capacity (C
3) one end, the 3rd diode (C
3) negative electrode connect;
The second described inductance (L
2) the other end respectively with the first electric capacity (C
2) one end and the first diode (D
1) negative electrode connect;
The first described electric capacity (C
2) the other end respectively with direct voltage source negative pole, the 3rd electric capacity (C
3) other end, the 4th electric capacity (C
4) one end, load (R
l) one end, switching tube (S) source electrode connect;
The 4th described diode (D
4) negative electrode respectively with the 4th electric capacity (C
4) the other end and load (R
l) the other end connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320575151.0U CN203590025U (en) | 2013-09-16 | 2013-09-16 | Single-switch high-gain boost converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320575151.0U CN203590025U (en) | 2013-09-16 | 2013-09-16 | Single-switch high-gain boost converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203590025U true CN203590025U (en) | 2014-05-07 |
Family
ID=50587872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320575151.0U Withdrawn - After Issue CN203590025U (en) | 2013-09-16 | 2013-09-16 | Single-switch high-gain boost converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203590025U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490622A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Single-switch high-gain boost converter |
| CN104821784A (en) * | 2014-12-12 | 2015-08-05 | 武汉绿鼎天舒科技发展有限公司 | Solar cell with boost circuit |
| CN110635684A (en) * | 2019-09-09 | 2019-12-31 | 南通大学 | Single-tube quasi-Z-source Boost converter |
-
2013
- 2013-09-16 CN CN201320575151.0U patent/CN203590025U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490622A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Single-switch high-gain boost converter |
| CN103490622B (en) * | 2013-09-16 | 2016-01-20 | 华南理工大学 | A kind of Single-switch high-gain boost converter |
| CN104821784A (en) * | 2014-12-12 | 2015-08-05 | 武汉绿鼎天舒科技发展有限公司 | Solar cell with boost circuit |
| CN110635684A (en) * | 2019-09-09 | 2019-12-31 | 南通大学 | Single-tube quasi-Z-source Boost converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103490622B (en) | A kind of Single-switch high-gain boost converter | |
| CN103490628B (en) | A kind of single-phase high-gain boost converter | |
| CN203261235U (en) | High-gain SEPIC converter | |
| CN103066873B (en) | Novel voltage reduction type bridgeless Cuk power factor correction (PFC) circuit | |
| CN101867297B (en) | Single-phase soft-switching and high-gain boost converter for distributed photovoltaic power generation | |
| CN201699584U (en) | High efficiency step-up converter for solar distributed power generation | |
| CN105450020A (en) | Common-ground high-gain Z source boost converter | |
| CN102684482A (en) | Single-switch high-gain direct current boost converter | |
| CN102684484A (en) | Double-input boost and buck converter within wide input voltage range | |
| CN103560666A (en) | Four-switch voltage boosting and reducing converter with low ripples and control method thereof | |
| CN105490523A (en) | Switching quasi-Z-source boost converter | |
| CN103633840A (en) | Single-switch high-gain boosting DC (direct current)/DC converter | |
| CN103312153B (en) | A kind of parallel multi input coupling inductance buck-boost converter | |
| CN203434860U (en) | High-gain boost converter based on coupling inductor and voltage transfer technology | |
| CN203590025U (en) | Single-switch high-gain boost converter | |
| CN203434865U (en) | Single-phase high-gain boost converter | |
| CN103490635B (en) | A kind of modified model H bridge buck-boost DC converter and control method thereof | |
| CN203434870U (en) | Two-winding coupling inductor voltage-multiplying single switch tube high-gain converter | |
| CN105490536A (en) | High-gain voltage-lifting quasi Z source converter | |
| CN103441668A (en) | High-gain boost DC-DC converter allowing pseudo continuous work | |
| CN203608084U (en) | Four-switch boost-buck converter with low ripple | |
| CN203457048U (en) | Low-ripple four-switch buck-boost DC converter | |
| CN104467414B (en) | A kind of power supply-capacitances in series type DC converter | |
| CN203590022U (en) | Non-cascaded Nth form Boost converter | |
| CN103337957B (en) | Low-ripple four-switch buck-boost direct-current converter and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140507 Effective date of abandoning: 20160120 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |