CN205178878U - Single switch high -gain converter that contains voltage -multiplying unit - Google Patents
Single switch high -gain converter that contains voltage -multiplying unit Download PDFInfo
- Publication number
- CN205178878U CN205178878U CN201520937040.9U CN201520937040U CN205178878U CN 205178878 U CN205178878 U CN 205178878U CN 201520937040 U CN201520937040 U CN 201520937040U CN 205178878 U CN205178878 U CN 205178878U
- Authority
- CN
- China
- Prior art keywords
- voltage
- storage capacitor
- diode
- multiplication
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a single switch high -gain converter that contains voltage -multiplying unit. This converter is formed by QBC circuit and the combination of switching capacity inductance voltage -multiplying unit. Including direct -current input power (Vin), input inductance (Lin), two middle energy storage inductance (L1, L2), an energy -storage capacitor (C1), a controllable power switch pipe (Q), three freewheeling diode (D1, D2, D4), a clamping diode (D3), three voltage -multiplying energy -storage capacitor (C2, C3, C4), an output diode (D0), an output filter capacitance (C0). Compare with traditional boost circuit, the utility model provides a combination converter has increased substantially voltage gain. Boost circuit duty cycle approaches at 1 o'clock and could realize 10 times voltage gain, and the utility model discloses a converter is just can making voltage gain reach more than 10 times about 0.5 the time in the duty cycle, and the switch tube pressure of having avoided limit duty cycle to cause has improved the efficiency of stepping up, secondly, voltage, the electric current stress of switch tube reduce, the passive harmless snubber circuit who is become by clamping diode and energy storage capacitor set can reduce the voltage spike of switch tube, reduces the switch tube loss, has improved the whole efficiency of converter.
Description
Technical field
The present invention relates to the DC-to-DC converter field of field of power electronics, specifically, relate to a kind of Single switch high-gain converter containing voltage doubling unit.
Background technology
In field of new energy generation, the output voltage of photovoltaic battery panel and storage battery is all lower, and busbar voltage reaches about 400 volts.If need to generate electricity by way of merging two or more grid systems, just require that the voltage gain of the DC booster converter of prime is more than 10 times.Therefore need one-level high efficiency, high step-up ratio converter photovoltaic battery panel or storage battery output voltage be raised to can be grid-connected electric pressure.
The gain of traditional B oost converter voltage is low, if will reach more than 10 times, pulse duty factor is close to 1; Boost inductor current ripple is comparatively large, and switch tube voltage stress is approximately equal to output, and shutoff voltage is also very large.Therefore, the turn-on and turn-off loss of switching tube is all very large, causes transducer effciency very low.In recent years, in conjunction with the high-gain feature of other circuit on traditional B oost circuit base, propose many high-gain converters: as Switching capacitors, improve voltage gain, but there is very large pulse in its input inductive current, and it is poor to export voltage stabilizing ability; As adopted switching capacity inductance unit to improve transducer gain, for reducing switch tube voltage stress, needing multiple switching tube work, adding converter overall volume cost; Adopt coupling inductance can increase substantially converter voltage gain, reduce switch tube voltage stress, but the energy demand design energy recovery circuit of the middle leakage inductance of coupling inductance, otherwise efficiency is lower.
Utility model content
1. the technical problems to be solved in the utility model
The utility model object is based on above defect, in conjunction with QBC circuit and switching capacity inductance unit boosting advantage, proposes a kind of novel Single switch high-gain converter containing voltage doubling unit.
2. application place
The utility model is applicable to the electric and electronic technical field that photovoltaic generating system, storage battery grid-connected technology etc. need to use high-gain converter.
3. technical scheme
In order to reach above object, the technical scheme that the utility model proposes is: a kind of Single switch, high-gain converter containing voltage doubling unit, combined by the QBC circuit proposed and voltage doubling unit, comprise direct-current input power supplying, input inductance, the first energy storage inductor and the second energy storage inductor, storage capacitor, controlled power switch pipe, first fly-wheel diode, the second fly-wheel diode, the 3rd fly-wheel diode, clamping diode, first multiplication of voltage storage capacitor, the second multiplication of voltage storage capacitor, the 3rd multiplication of voltage storage capacitor, output diode, output filter capacitor;
The positive pole of direct-current input power supplying is connected with one end of input inductance, negative pole is connected with the source electrode of power switch pipe with one end of storage capacitor, the other end of input inductance is connected with the positive pole of the second fly-wheel diode with the positive pole of the first fly-wheel diode respectively, the negative pole of the first fly-wheel diode is connected with the positive pole of clamping diode and one end of the first multiplication of voltage storage capacitor with the drain electrode of power switch pipe, the negative pole of the second fly-wheel diode is connected with one end of storage capacitor with one end of the first energy storage inductor, the other end of energy storage inductor is connected with the drain electrode of power switch pipe, the negative pole of clamping diode is connected with one end of the second multiplication of voltage storage capacitor and the positive pole of the 3rd fly-wheel diode with one end of the second energy storage inductor, the other end of the second multiplication of voltage storage capacitor is connected with the source electrode of power switch pipe, the other end of the second energy storage inductor is then connected with one end of the 3rd multiplication of voltage storage capacitor with the other end of first times of voltage capacitance, the other end of the 3rd multiplication of voltage storage capacitor is then connected with the positive pole of output diode with the negative pole of the 3rd fly-wheel diode, the negative pole of output diode is connected with the positive pole of output filter capacitor, the negative pole of output filter capacitor is then linked on the source electrode of power switch pipe, two terminating load of output filter capacitor, the voltage at output filter capacitor two ends and output voltage.
The utility model has two kinds of operation modes when inputting inductance and energy storage inductor is all in continuous current mode state:
Operation mode 1: switching tube conducting, input power and storage capacitor give input inductance and the first intermediate energy storage induction charging respectively, and the second multiplication of voltage storage capacitor gives the charging of the second energy storage inductor, the first multiplication of voltage storage capacitor and the 3rd multiplication of voltage storage capacitor respectively.
Operation mode 2: switching tube turns off, input inductance and the electric discharge of first, second energy storage inductor, intermediate energy storage capacity charge, the first, the 3rd multiplication of voltage storage capacitor electric discharge, the second multiplication of voltage storage capacitor charging.
4. beneficial effect
(1) adopt the scheme that the utility model proposes, compared with traditional B oost circuit, increased substantially voltage gain, reduced switch tube voltage stress, improve converter whole efficiency.And form passive lossless snubber clamp circuit by clamping diode and intermediate energy storage electric capacity, reduce due to voltage spikes when switching tube turns off, decrease switching tube turn-off power loss, improve transducer effciency.
(2) compared with other high-gain converters, adopt the non-isolated structure of inductance, only need a switching tube, topological structure is simply easy to control.
Accompanying drawing explanation
Fig. 1 is the topology diagram of a kind of Single switch high-gain converter containing voltage doubling unit that the utility model proposes;
Fig. 2 is the equivalent circuit diagram of the operation mode 1 of a kind of Single switch high-gain converter containing voltage doubling unit that the utility model proposes;
Fig. 3 is the equivalent circuit diagram of the operation mode 2 of a kind of Single switch high-gain converter containing voltage doubling unit that the utility model proposes.
Label declaration in figure:
V
in: direct-current input power supplying; L
in: input inductance; L
1: the first energy storage inductor; L
2: the second energy storage inductor; C
1: storage capacitor; Q: controlled power switch pipe; D
1: the first fly-wheel diode; D
2: the second fly-wheel diode; D
4: the 3rd fly-wheel diode; D
3: clamping diode; C
2: the first multiplication of voltage storage capacitor; C
3: the second multiplication of voltage storage capacitor; C
4: the 3rd multiplication of voltage storage capacitor; D
0: output diode; C
0: output filter capacitor; R: load resistance.
Embodiment
In conjunction with the embodiments here makes further detailed description with accompanying drawing to the utility model.
Combined by QBC circuit and voltage doubling unit, comprise direct-current input power supplying (V
in), input inductance (L
in), two energy storage inductor (L
1, L
2), a storage capacitor (C
1), a controlled power switch pipe (Q), three fly-wheel diode (D
1, D
2, D
4), a clamping diode (D
3), three multiplication of voltage storage capacitor (C
2, C
3, C
4), an output diode (D
0), an output filter capacitor (C
0), load R;
Described direct-current input power supplying V
inpositive pole with input inductance L
inone end be connected, negative pole and storage capacitor C
1one end be connected with the source electrode of power switch pipe Q, input inductance L
inthe other end respectively at the first sustained diode
1with the second sustained diode
2positive pole be connected, the first sustained diode
1negative pole and the drain electrode of power switch pipe Q and clamping diode D
3positive pole and the first multiplication of voltage storage capacitor C
2one end be connected, the second sustained diode
2negative pole and the first energy storage inductor L
1one end and storage capacitor C
1one end be connected, the first energy storage inductor L
1the other end be connected with the drain electrode of power switch pipe Q, clamping diode D
3negative pole and the second energy storage inductor L
2one end and the second multiplication of voltage storage capacitor C
3one end and the 3rd sustained diode
4positive pole be connected, the second multiplication of voltage storage capacitor C
3the other end be connected with the source electrode of power switch pipe Q, the second energy storage inductor L
2the other end then with the first multiplication of voltage storage capacitor C
2the other end and the 3rd multiplication of voltage storage capacitor C
4one end be connected, the 3rd multiplication of voltage storage capacitor C
4the other end then with the 3rd sustained diode
4negative pole and output diode (D
0) positive pole be connected, output diode D
0negative pole and output filter capacitor C
0positive pole be connected, output filter capacitor C
0negative pole then link on the source electrode of power switch pipe Q, output filter capacitor C
0two terminating load R.
A kind of Single switch high-gain converter containing voltage doubling unit that the utility model proposes, when inputting inductance and intermediate energy storage inductance is all in continuous current mode state, comprise two operation modes, labor is as follows:
Operation mode 1:
The current flowing loop of Fig. 2 mode for this reason.Drive pulse signal is added on switching tube Q, switching tube conducting.Diode D
2, D
3, D
0respectively because voltage V
c1, V
c3and V
0-V
c3and oppositely end, only have diode D
1, D
4conducting.Input voltage V
inwith capacitance voltage V
c1give input inductance L respectively
inand L
1charging, current i
linand i
l1linear rising.C
3pass through inductance L
2to C
2charging, inductive current i
l2rise; C simultaneously
3by diode D
4to C
4charging.Output capacitance C
0be continuously load supplying.
Operation mode 2:
The current flowing loop of Fig. 3 mode for this reason.Switching tube turns off, diode D
2, D
3, D
0for input inductance L
inwith energy storage inductor L
1, L
2there is provided discharge loop and conducting; Diode D
1, D
4bear reverse voltage V respectively
l1, V
0-V
c3be cut off.Input power V
inwith input inductance L
inby diode D
2to storage capacitor C
1charging, charging current and inductive current i
linlinear decline; Be stored in inductance L
1in energy pass through D
3to electric capacity C
3charging; Be stored in inductance L
2in energy pass through D
0to output capacitance C
0charging, thus powering load.Electric capacity C
2and C
3series connection is powered to output loading.Until switching tube conducting again, enter next switch periods.
During stable state, voltage gain is analyzed:
Switching tube conducting, energy storage inductor L
in, L
2and L
3charge respectively, the voltage at inductance two ends is:
V
L1＝V
in(1)
V
L2＝V
C1(2)
V
L3＝V
C3-V
C2(3)
Middle multiplication of voltage storage capacitor C
3give middle times voltage capacitance C in parallel respectively
2, C
4charging:
V
C3＝V
C2+V
C4(4)
When switching tube turns off, three energy storage inductor electric discharges, inductance both end voltage is:
V
Lin＝V
in-V
C1(5)
V
L1＝V
C1-V
C3(6)
V
L2＝-V
C2(7)
Middle multiplication of voltage storage capacitor C2 and C4 discharged in series:
V
0＝V
C2+V
C3+V
C4(8)
If switch periods is T
s, duty ratio is D.According to the voltage-second balance principle of inductance, can be obtained by (1) ~ (3) and (5) ~ (7):
DT
SV
in+(1-D)T
S(V
in-V
C1)＝0(9)
DT
SV
C1+(1-D)T
S(V
C1-V
C3)＝0(10)
DT
SV
C4+(1-D)T
S(-V
C2)＝0(11)
The converter voltage gain that simultaneous (4) and (8) and (9) ~ (11) can the utility model proposes is:
From formula (12), compared with traditional B oost circuit, the voltage gain of the converter that the utility model proposes is improved largely; Compared with QBC circuit, voltage gain is 2 times of QBC converter.When duty ratio is about 0.5, just can realize the voltage gain of 10 times, voltage gain is required that higher occasion has important theory value and actual reference significance.
Claims (4)
1., containing a Single switch high-gain converter for voltage doubling unit, it is characterized in that:
Combined by QBC circuit and voltage doubling unit, comprise direct-current input power supplying V
in, input inductance L
in, two intermediate energy storage inductance L
1and L
2, a storage capacitor C
1, a controlled power switch pipe Q, three sustained diode
1, D
2and D
4, a clamping diode D
3, three multiplication of voltage storage capacitor C
2, C
3and C
4, an output diode D
0, an output filter capacitor C
0, load;
Described direct-current input power supplying V
inpositive pole with input inductance L
inone end be connected, negative pole and storage capacitor C
1one end be connected with the source electrode of power switch pipe Q, input inductance L
inthe other end respectively with sustained diode
1and D
2positive pole be connected, sustained diode
1negative pole and the drain electrode of power switch pipe Q and clamping diode D
3positive pole and multiplication of voltage storage capacitor C
2one end be connected, sustained diode
2negative pole and energy storage inductor L
1one end and storage capacitor C
1one end be connected, energy storage inductor L
1the other end be connected with the drain electrode of power switch pipe Q, clamping diode D
3negative pole and energy storage inductor L
2one end and multiplication of voltage storage capacitor C
3one end and sustained diode
4positive pole be connected, multiplication of voltage storage capacitor C
3the other end be connected with the source electrode of power switch pipe Q, energy storage inductor L
2the other end then with multiplication of voltage storage capacitor C
2the other end and multiplication of voltage storage capacitor C
4one end be connected, multiplication of voltage storage capacitor C
4the other end then with sustained diode
4negative pole and output diode D
0positive pole be connected, output diode D
0negative pole and output filter capacitor C
0positive pole be connected, output filter capacitor C
0negative pole then link on the source electrode of power switch pipe Q, output filter capacitor C
0two terminating load.
2. according to a kind of Single switch high-gain converter containing voltage doubling unit that claim 1 proposes, it is characterized in that converter only needs a switching tube, structure is simple and be easy to control.
3., according to a kind of Single switch high-gain converter containing voltage doubling unit that claim 1 proposes, it is characterized in that the high gain characteristics based on QBC circuit and voltage doubling unit, when duty ratio is 0.5, the output voltage gain of converter can reach more than 10 times.
4., according to a kind of Single switch high-gain converter containing voltage doubling unit that claim 1 proposes, it is characterized in that the passive lossless snubber be made up of multiplication of voltage storage capacitor and clamping diode, the due to voltage spikes of switching tube shutdown moment can be reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520937040.9U CN205178878U (en) | 2015-11-23 | 2015-11-23 | Single switch high -gain converter that contains voltage -multiplying unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520937040.9U CN205178878U (en) | 2015-11-23 | 2015-11-23 | Single switch high -gain converter that contains voltage -multiplying unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205178878U true CN205178878U (en) | 2016-04-20 |
Family
ID=55742808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520937040.9U Expired - Fee Related CN205178878U (en) | 2015-11-23 | 2015-11-23 | Single switch high -gain converter that contains voltage -multiplying unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205178878U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877656A (en) * | 2017-03-22 | 2017-06-20 | 华南理工大学 | A kind of multi input high-gain Z source converters based on switching capacity unit |
| CN107070211A (en) * | 2017-03-22 | 2017-08-18 | 华南理工大学 | A kind of multi input high-gain Z source converters based on voltage doubling unit |
| CN107979283A (en) * | 2017-11-30 | 2018-05-01 | 东南大学 | cascade boost converter based on asymmetric boosting unit |
| CN108429451A (en) * | 2018-03-13 | 2018-08-21 | 东南大学 | A kind of photovoltaic system cascade connection type is booted DC-DC converter more |
| CN111865076A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Direct-current voltage reduction circuit applied to energy supply of relay protection device of transformer substation |
| CN114006546A (en) * | 2021-11-04 | 2022-02-01 | 珠海格力电器股份有限公司 | Current sampling circuit of voltage doubling circuit, control method and air conditioner |
| CN116827126A (en) * | 2023-03-23 | 2023-09-29 | 广东工业大学 | High-gain boost converter |
-
2015
- 2015-11-23 CN CN201520937040.9U patent/CN205178878U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877656A (en) * | 2017-03-22 | 2017-06-20 | 华南理工大学 | A kind of multi input high-gain Z source converters based on switching capacity unit |
| CN107070211A (en) * | 2017-03-22 | 2017-08-18 | 华南理工大学 | A kind of multi input high-gain Z source converters based on voltage doubling unit |
| CN107979283A (en) * | 2017-11-30 | 2018-05-01 | 东南大学 | cascade boost converter based on asymmetric boosting unit |
| CN108429451A (en) * | 2018-03-13 | 2018-08-21 | 东南大学 | A kind of photovoltaic system cascade connection type is booted DC-DC converter more |
| CN111865076A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Direct-current voltage reduction circuit applied to energy supply of relay protection device of transformer substation |
| CN114006546A (en) * | 2021-11-04 | 2022-02-01 | 珠海格力电器股份有限公司 | Current sampling circuit of voltage doubling circuit, control method and air conditioner |
| CN114006546B (en) * | 2021-11-04 | 2023-08-25 | 珠海格力电器股份有限公司 | Current sampling circuit of voltage boosting circuit, control method and air conditioner |
| CN116827126A (en) * | 2023-03-23 | 2023-09-29 | 广东工业大学 | High-gain boost converter |
| CN116827126B (en) * | 2023-03-23 | 2023-11-28 | 广东工业大学 | High-gain boost converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205178878U (en) | Single switch high -gain converter that contains voltage -multiplying unit | |
| CN203261235U (en) | High-gain SEPIC converter | |
| CN101895223B (en) | Double-Cuk buck-boost output parallel-type converter | |
| CN101867297B (en) | Single-phase soft-switching and high-gain boost converter for distributed photovoltaic power generation | |
| CN103346672B (en) | Multi-stage single switch boost converter | |
| CN203233309U (en) | High-gain high-efficiency boost converter realized by three-winding coupling inductor | |
| CN108988634B (en) | Three-phase interleaved bidirectional large-transformation-ratio DCDC converter and control method thereof | |
| CN105391287A (en) | Zero-input current ripple high-gain converter based on double coupling inductors and single switch | |
| CN102208868A (en) | Direct-current to direct-current converter with high boost transformation ratio | |
| CN103490622B (en) | A kind of Single-switch high-gain boost converter | |
| CN107659144B (en) | Inductor built-in boost unit converter | |
| CN103929058A (en) | Two-phase interleaved converter based on coupled inductors | |
| CN103095134A (en) | Active network boost converter | |
| CN103633839A (en) | Improved Z-source boosting DC (direct current)-DC converter | |
| CN101958660A (en) | Dual-Sepic buck-boost output parallel combined inverter | |
| CN103326566A (en) | Four-switch boost and step down DC converter and control method thereof | |
| CN105553254A (en) | Zero-voltage switch high-gain DC-DC converter containing switched capacitors | |
| CN107919797A (en) | The fuel cell efficient voltage boosting dc converter of wide input range crisscross parallel type | |
| CN103887987A (en) | Multiple voltage-multiplying high-gain high-frequency rectification isolation converter based on switched capacitor | |
| CN103904923A (en) | High-gain high-frequency boosting and rectifying isolated converter based on hybrid rectifying bridge arm and switch capacitors | |
| CN203883673U (en) | Improved Z-source boost DC-DC converter | |
| CN203827175U (en) | Novel soft switching bi-directional DC-DC converter | |
| CN103066841A (en) | Voltage-multiplying DC converter based on charge pump capacitor | |
| CN205195559U (en) | Novel DC -DC converter steps up | |
| CN203775027U (en) | High-voltage-boost-ratio converter with bidirectional voltage output used for photovoltaic module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20161123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |