CN103762841A - Embedded single-switch Buck-Boost converter - Google Patents
Embedded single-switch Buck-Boost converter Download PDFInfo
- Publication number
- CN103762841A CN103762841A CN201410043097.4A CN201410043097A CN103762841A CN 103762841 A CN103762841 A CN 103762841A CN 201410043097 A CN201410043097 A CN 201410043097A CN 103762841 A CN103762841 A CN 103762841A
- Authority
- CN
- China
- Prior art keywords
- inductance
- diode
- boost converter
- electric capacity
- buck
- 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.)
- Granted
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention provides an embedded single-switch Buck-Boost converter. The embedded single-switch Buck-Boost converter is characterized in that a main Buck-Boost converter body is formed by a direct current power source, a switch tube, a first capacitor, a second inductor, a second diode, a second capacitor and a load, and an embedded Buck-Boost converter body is formed by the direct current power source, the switch tube, the first capacitor, a first inductor, a first diode and a third diode. When the switch tube is switched on, the first inductor is charged through the direct current power source, the second inductor is charged jointly through the direct current power source and the first capacitor, and meanwhile the second capacitor supplies power to the load; when the switch tube is switched off, the first inductor supplies power to the first capacitor, and meanwhile the second inductor supplies power to the second capacitor and the load. One Buck-Boost converter body is embedded into another Buck-Boost converter body only through one switch tube, and the gain can reach D/(1-D)<2>.
Description
Technical field
The present invention relates to high-gain non-isolation type DC-DC converter field, be specifically related to a kind of embedded single switch Buck-Boost converter.
Background technology
In recent years, high gain boost DC-DC converter is widely used in UPS, distributed photovoltaic power generation and battery energy storage system.At present, high gain boost DC-DC converter has switching capacity type, switched inductors type, realizes the rising of voltage by increasing switching capacity or inductance, also makes circuit structure become very complicated simultaneously.In addition, by isolating transformer or coupling inductance, realize high-gain in addition, but the leakage inductance of transformer and coupling inductance is difficult to control, can greatly increases stress and the energy loss of device.In addition, embedded DC-DC converter can be realized high-gain, be subject to equally very large favor, if basic Buck-Boost converter is embedded in another Buck-Boost converter, can obtain high-gain cascade converter simple in structure, but how to use a switching tube to realize the embedded converter of high-gain, be still a difficult problem.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, propose a kind of embedded single switch Buck-Boost converter converter.
The technical solution used in the present invention is as follows.
A kind of embedded single switch Buck-Boost converter converter, forms main Buck-Boost converter with DC power supply, switching tube, the first electric capacity, the second inductance, the second diode, the second electric capacity and load; With DC power supply, switching tube, the first electric capacity, the first inductance, the first diode and the 3rd diode, form and embed Buck-Boost converter.
In above-mentioned embedded single switch Buck-Boost converter converter, the positive pole of DC power supply is connected with the drain electrode of switching tube, the negative pole of the source electrode of switching tube and the first electric capacity, one end of the first inductance connects, the anode of the other end of the first inductance and the first diode, the anodic bonding of the 3rd diode, the positive pole of the negative electrode of the first diode and the first electric capacity, the negative electrode of the second diode, one end of the second inductance connects, the other end of the second inductance and the negative pole of DC power supply, the negative electrode of the 3rd diode, the positive pole of the second electric capacity, one end of load connects, the anode of the other end of load and the second diode, the negative pole of the second electric capacity connects.
In above-mentioned embedded single switch Buck-Boost converter converter, when switching tube is opened, DC power supply is given the first induction charging, and DC power supply and the first electric capacity are given the second induction charging, simultaneously the second electric capacity powering load jointly; When switching tube turn-offs, the first inductance is given the first capacitor charging, and the second inductance is given the second electric capacity and load supplying simultaneously.
The mode of operation of above-mentioned converter comprises the first inductance L
1electric current and the second inductance L
2electric current all work in continuous conduction mode (L
2-CCM pattern), the first inductance L
1current work in continuous conduction mode and the second inductance L
2current work in discontinuous conduction mode (L2-DCM pattern).
Compared with prior art, the advantage that the present invention has is: only use a switching tube, realize a Buck-Boost converter and be embedded in another Buck-Boost converter, simplified greatly circuit structure, gain can reach D/ (1-D)
2, D is the duty ratio of switch controlled signal.
Accompanying drawing explanation
Fig. 1 is a kind of embedded single switch Buck-Boost converter structure chart of the present invention;
Fig. 2 is that a kind of embedded single switch Buck-Boost converter shown in Fig. 1 works in L
2crucial current waveform figure under-CCM pattern;
Fig. 3 is that a kind of embedded single switch Buck-Boost converter shown in Fig. 1 works in L
2crucial current waveform figure under-DCM pattern;
Fig. 4 a, Fig. 4 b are respectively that a kind of embedded single switch Buck-Boost converter shown in Fig. 1 works in L
2two kinds of operation modes under-CCM pattern;
Fig. 5 is that a kind of embedded single switch Buck-Boost converter shown in Fig. 1 works in L
2a kind of operation mode under-DCM pattern;
Fig. 6 is that a kind of embedded single switch Buck-Boost converter shown in Fig. 1 works in L
2simulation waveform figure under-CCM pattern;
Fig. 7 is that a kind of embedded single switch Buck-Boost converter shown in Fig. 1 works in L
2simulation waveform figure under-DCM pattern.
Embodiment
For further setting forth content of the present invention and feature, below in conjunction with accompanying drawing, specific embodiment of the invention scheme is specifically described, but enforcement of the present invention is not limited to this.
With reference to figure 1, a kind of embedded single switch Buck-Boost converter of the present invention, with DC power supply V
in, switching tube Q, the first capacitor C
1, the second inductance L
2, the second diode D
2, the second capacitor C
oform main Buck-Boost converter with load R; With DC power supply V
in, switching tube Q, the first capacitor C
1, the first inductance L
1, the first diode D
1with the 3rd diode D
3form and embed Buck-Boost converter, its gain can reach D/ (1-D)
2, D is the duty ratio of switch controlled signal.
DC power supply V
inpositive pole be connected with the drain electrode of switching tube Q, the source electrode of switching tube Q and the first capacitor C
1negative pole, the first inductance L
1one end connect, the first inductance L
1the other end and the first diode D
1anode, the 3rd diode D
3anodic bonding, the first diode D
1negative electrode and the first capacitor C
1positive pole, the second diode D
2negative electrode, the second inductance L
2one end connect, the second inductance L
2the other end and DC power supply V
innegative pole, the 3rd diode D
3negative electrode, the second capacitor C
oone end of positive pole, load R connect, the other end of load R and the second diode D
2anode, the second capacitor C
onegative pole connect.
Take Fig. 1 as main circuit structure, in conjunction with Fig. 2～Fig. 5, narrate specific works principle of the present invention below.
First consider that converter is operated in L
2-CCM pattern, crucial current waveform figure as shown in Figure 2:
T in Fig. 2
0-t
1in the stage, switching tube Q is open-minded, the first diode D
1with the second diode D
2cut-off, the 3rd diode D
3conducting, DC power supply V
inthrough switching tube Q and the 3rd diode D
3give the first inductance L
1charging, the first inductance L
1current i
l1linear rising; DC power supply V
inwith the first capacitor C
1jointly through switching tube Q, give the second inductance L
2charging, the second inductance L
2current i
l2linear rising, simultaneously the second capacitor C
ogive load R power supply, current path is as shown in Fig. 4 a.
T in Fig. 2
1-t
2in the stage, switching tube Q turn-offs, the first inductance L
1by the first diode D
1afterflow, the second inductance L
2by the second diode D
2afterflow, the 3rd diode D
3cut-off, the first inductance L
1through the first diode D
1give the first capacitor C
1charging, the first inductance L
1current i
l1linear decline, the second inductance L
2through the second diode D
2give the second capacitor C simultaneously
owith load R power supply, the second inductance L
2current i
l2linear decline, current path as shown in Figure 4 b.
Consider that again converter is operated in L
2-DCM pattern, crucial current waveform figure as shown in Figure 3:
The t of Fig. 2 and Fig. 3
0-t
2in the stage, the course of work of converter is identical.T=t
3, the second inductance L
2current i
l2drop to zero.
The t of Fig. 3
2-t
3in the stage, switching tube Q continues to turn-off, the second diode D
2with the 3rd diode D
3cut-off, the first inductance L
1through the first diode D
1continuation is to the first capacitor C
1charging, the first inductance L
1current i
l1continue linear decline, simultaneously the second capacitor C
ogive load R power supply, current path as shown in Figure 5.
Fig. 6 illustrates that converter works in L
2simulation waveform figure under-CCM pattern is the gate pole control signal v of switching tube from top to bottom successively
gQ, the first inductance current i
l1, the second inductance current i
l2, flow through the current i of the first electric capacity
c1, flow through the current i of the second electric capacity
c2, the current i of the first inductance as can be seen from Fig. 6
l1current i with the second inductance
l2all continuous.
Fig. 7 illustrates that converter works in L
2simulation waveform figure under-DCM pattern is the gate pole control signal v of switching tube from top to bottom successively
gQ, the first inductance current i
l1, the second inductance current i
lx, flow through the current i of the first electric capacity
c1, flow through the current i of the second electric capacity
c2, the current i of the first inductance as can be seen from Fig. 6
l1continuously, and the current i of the second inductance
l2intermittently.
Claims (4)
1. an embedded single switch Buck-Boost converter, is characterized in that: with DC power supply (
v in ), switching tube (
q), the first electric capacity (
c 1 ), the second inductance (
l 2 ), the second diode (
d 2 ), the second electric capacity (
c o ) and load (
r) form main Buck-Boost converter; With DC power supply (
v in ), switching tube (
q), the first electric capacity (
c 1 ), the first inductance (
l 1 ), the first diode (
d 1 ) and the 3rd diode (
d 3 ) formation embedding Buck-Boost converter.
2. a kind of embedded single switch Buck-Boost converter according to claim 1, is characterized in that: DC power supply (
v in ) positive pole and switching tube (
q) drain electrode connect, switching tube (
q) source electrode and the first electric capacity (
c 1 ) negative pole, the first inductance (
l 1 ) one end connect, the first inductance (
l 1 ) the other end and the first diode (
d 1 ) anode, the 3rd diode (
d 3 ) anodic bonding, the first diode (
d 1 ) negative electrode and the first electric capacity (
c 1 ) positive pole, the second diode (
d 2 ) negative electrode, the second inductance (
l 2 ) one end connect, the second inductance (
l 2 ) the other end and DC power supply (
v in ) negative pole, the 3rd diode (
d 3 ) negative electrode, the second electric capacity (
c o ) positive pole, load (
r) one end connect, load (
r) the other end and the second diode (
d 2 ) anode, the second electric capacity (
c o ) negative pole connect.
3. a kind of embedded single switch Buck-Boost converter according to claim 1, is characterized in that: when switching tube (
q) while opening, DC power supply (
v in ) give the first inductance (
l 1 ) charging, DC power supply (
v in ) and the first electric capacity (
c 1 ) jointly give the second inductance (
l 2 ) charging, while the second electric capacity (
c o ) give load (
r) power supply; When switching tube (
q) turn-off time, the first inductance (
l 1 ) give the first electric capacity (
c 1 ) charging, while the second inductance (
l 2 ) give the second electric capacity (
c o ) and load (
r) power supply.
4. a kind of embedded single switch Buck-Boost converter according to claim 1, is characterized in that: the mode of operation of converter comprise the first inductance (
l 1 ) electric current and the second inductance (
l 2 ) electric current all work in continuous conduction mode, and the first inductance (
l 1 ) current work in continuous conduction mode and the second inductance (
l 2 ) current work in discontinuous conduction mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410043097.4A CN103762841B (en) | 2014-01-28 | 2014-01-28 | A kind of embedded single switch Buck-Boost converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410043097.4A CN103762841B (en) | 2014-01-28 | 2014-01-28 | A kind of embedded single switch Buck-Boost converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103762841A true CN103762841A (en) | 2014-04-30 |
| CN103762841B CN103762841B (en) | 2016-04-13 |
Family
ID=50530026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410043097.4A Active CN103762841B (en) | 2014-01-28 | 2014-01-28 | A kind of embedded single switch Buck-Boost converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103762841B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109600040A (en) * | 2018-12-17 | 2019-04-09 | 北京交通大学 | The Zeta type high step-up ratio DC converter of photovoltaic cell capable of generating power |
| CN109617399A (en) * | 2018-12-17 | 2019-04-12 | 北京交通大学 | Sepic type high-gain DC converter based on clamping voltage boosting unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1950995A (en) * | 2004-04-30 | 2007-04-18 | 美蓓亚株式会社 | DC/DC converter |
| US20110057639A1 (en) * | 2009-09-09 | 2011-03-10 | City University Of Hong Kong | Passive lossless snubber cell for a power converter |
| US20130077362A1 (en) * | 2011-09-28 | 2013-03-28 | General Electric Company | Power factor correction (pfc) circuit configured to control high pulse load current and inrush current |
| CN103490622A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Single-switch high-gain boost converter |
| CN103490621A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Wide-gain buck-boost converter |
| CN203722473U (en) * | 2014-01-28 | 2014-07-16 | 华南理工大学 | Embedded single-switch Buck-Boost converter |
-
2014
- 2014-01-28 CN CN201410043097.4A patent/CN103762841B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1950995A (en) * | 2004-04-30 | 2007-04-18 | 美蓓亚株式会社 | DC/DC converter |
| US20110057639A1 (en) * | 2009-09-09 | 2011-03-10 | City University Of Hong Kong | Passive lossless snubber cell for a power converter |
| US20130077362A1 (en) * | 2011-09-28 | 2013-03-28 | General Electric Company | Power factor correction (pfc) circuit configured to control high pulse load current and inrush current |
| CN103490622A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Single-switch high-gain boost converter |
| CN103490621A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Wide-gain buck-boost converter |
| CN203722473U (en) * | 2014-01-28 | 2014-07-16 | 华南理工大学 | Embedded single-switch Buck-Boost converter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109600040A (en) * | 2018-12-17 | 2019-04-09 | 北京交通大学 | The Zeta type high step-up ratio DC converter of photovoltaic cell capable of generating power |
| CN109617399A (en) * | 2018-12-17 | 2019-04-12 | 北京交通大学 | Sepic type high-gain DC converter based on clamping voltage boosting unit |
| CN109617399B (en) * | 2018-12-17 | 2020-01-10 | 北京交通大学 | Sepic type high-gain direct current converter based on clamping boosting unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103762841B (en) | 2016-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203590031U (en) | DC-DC converter realizing high-efficiency high-gain low-voltage current stress | |
| CN105939112B (en) | A kind of quasi- boost switching DC-DC converter of high-gain | |
| CN105939107B (en) | A kind of quasi- boost switching DC-DC converter of mixed type | |
| CN103269164B (en) | The quasi-single-stage high power factor circuit of former limit current constant control and device | |
| CN102723869A (en) | Power converter | |
| CN203722473U (en) | Embedded single-switch Buck-Boost converter | |
| CN203645540U (en) | A high-efficiency high-gain DC-DC converter with coupling inductors | |
| CN104270085A (en) | DC/DC conversion circuit in solar photovoltaic power generation system | |
| CN105978322B (en) | A kind of quasi- sources Z DC-DC converter of switching capacity type high-gain | |
| CN103762841B (en) | A kind of embedded single switch Buck-Boost converter | |
| CN104393755A (en) | High-efficiency booster circuit | |
| CN204031528U (en) | A kind of energy-conservation driving circuit of high-power LED lamp | |
| CN103633835B (en) | The DC-DC converter of High-efficiency high-gain low-voltage current stress | |
| CN206698115U (en) | A kind of two-tube Z sources DC voltage converter | |
| CN203691247U (en) | High-efficiency high-gain DC-DC converter with double coupling inductors | |
| CN201766502U (en) | Circuit topological structure of non-isolation type zero-voltage soft switching DC (direct current) to DC converter | |
| CN204013231U (en) | A kind of boosted switch power supply | |
| CN103762852B (en) | High-efficiency high-gain DC-DC converter with double coupling inductors | |
| CN203326884U (en) | Primary-side constant-current control quasi-single-stage high-power-factor circuit and device | |
| CN103633833A (en) | Single-switching-tube converter Boost-Buck-Boost converter | |
| CN203339977U (en) | BUCK-BUCK-BOOST bridgeless converter | |
| CN203368351U (en) | BOOST-BUCK-BOOST bridgeless convertor | |
| CN105515367A (en) | High-step-down DC/DC converter based on a Sepic circuit | |
| CN102570796B (en) | Multi-path output boosting converter | |
| CN203827173U (en) | Single-tube Boost-Buck-Boost converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |