CN203590024U - Wide-gain buck-boost converter - Google Patents
Wide-gain buck-boost converter Download PDFInfo
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- CN203590024U CN203590024U CN201320575121.XU CN201320575121U CN203590024U CN 203590024 U CN203590024 U CN 203590024U CN 201320575121 U CN201320575121 U CN 201320575121U CN 203590024 U CN203590024 U CN 203590024U
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- diode
- power
- boost converter
- buck
- gain
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Abstract
The utility model provides a wide-gain buck-boost converter. The wide-gain buck-boost converter mainly comprises a power switch tube, two power inductors, an intermediate energy-storage capacitor, an output capacitor and three diodes. In the working process of the wide-gain buck-boost converter, the inherent properties of an inductor-capacitor-diode network are utilized, and when the power switch tube is switched off, the second power inductor charges the intermediate energy-storage capacitor, and the first power inductor discharges a load; and when the power switch tube is switched on, the intermediate energy-storage capacitor and an input power supply charge the first power inductor simultaneously, thereby stepping up the output voltage. According to the utility model, the gain of the output voltage of the converter is expanded by combining original characteristics of the conventional buck-boost converter.
Description
Technical field
The utility model relates to converters technical field, is specifically related to a kind of wide gain buck-boost converter.
Background technology
Along with life and industrial expansion, more and more higher to the requirement of converters, there is the buck-boost converter boosting with buck functionality simultaneously and obtained application in various degree in increasing occasion.But traditional buck-boost converter is due to its inherent characteristic, and the excursion of output voltage is less, output voltage can only change in 0～9 times of input voltage conventionally.In the occasion of low pressure high input voltage output, as solar power system and fuel cell system, traditional buck-boost converter becomes no longer applicable.In order to expand the scope of application of traditional buck-boost converter, be necessary to realize by technological improvement the expansion of its output voltage excursion.But method by cascade can realize above-mentioned target can bring that switching tube quantity increases, the stability of a system reduces and the deficiency such as decrease in efficiency.
Utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of wide gain buck-boost converter is provided.
The utility model is achieved through the following technical solutions:
A wide gain buck-boost converter, mainly comprises input power, switching tube, the first power inductance, the second power inductance, intermediate energy storage electric capacity, output capacitance, the first diode, the second diode, the 3rd diode and load.
The drain electrode of described switching tube is connected with the positive pole of input power;
The source electrode of described switching tube is connected with the negative electrode of the 3rd diode with one end of the first power inductance, the anode of the first diode respectively;
The other end of described the first power inductance respectively with one end of intermediate energy storage electric capacity and the anodic bonding of the second diode;
The negative electrode of described the first diode is connected with one end of the second power inductance with the negative electrode of the second diode respectively;
The anode of described the 3rd diode is connected with one end of output capacitance and one end of load respectively;
The other end of the other end of described intermediate energy storage electric capacity, the second power inductance, the other end of output capacitance and the other end of load and the negative pole of input power are connected.
Described the first diode, the second diode, the 3rd diode are fast recovery diode.
Compared with prior art the utlity model has following advantage:
The utility model is without extra power switch pipe, simple in structure, and it is convenient to control; During the utility model work, utilize the intrinsic characteristic of inductor-capacitor-diode network, when switching tube turn-offs, the second power inductance is to intermediate energy storage capacitor charging, the first power inductance is to load discharge, when switching tube conducting, intermediate energy storage electric capacity and input power are given the first power inductance charging simultaneously, thereby boosted output voltages is realized the expansion of converter output voltage gain in conjunction with the primary characteristic of traditional buck-boost circuit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the embodiment of a kind of wide gain buck-boost converter described in the utility model;
Fig. 2 a, Fig. 2 b are respectively the groundwork mode figure of circuit diagram shown in Fig. 1 in a switch periods.Wherein Fig. 2 a is the circuit diagram of operation mode 1, and Fig. 2 b is the circuit diagram of operation mode 2.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. 3 is the gain contrast curve chart of converter described in the utility model and traditional buck-boost converter.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, wide gain buck-boost converter mainly comprises input power V
g, switching tube S, the first power inductance L
1with the second power inductance L
2, intermediate energy storage capacitor C
1, output capacitance C
2, the first diode D
1, the second diode D
2, the 3rd diode D
3with load R.
The drain electrode of described switching tube S and input power V
gpositive pole connect;
The source electrode of described switching tube S respectively with the first power inductance L
1one end, the first diode D
1anode and the 3rd diode D
3negative electrode connect;
Described the first power inductance L
1the other end respectively with intermediate energy storage capacitor C
1one end and the second diode D
2anodic bonding;
Described the first diode D
1negative electrode respectively with the second diode D
2negative electrode and the second power inductance L
2one end connect;
Described the 3rd diode D
3anode respectively with output capacitance C
2one end be connected with one end of load R;
Described intermediate energy storage capacitor C
1the other end, the second power inductance L
2the other end, output capacitance C
2the other end and the other end and the input power V of load R
gnegative pole connect.
As shown in Figure 2 a and 2 b, a kind of wide gain buck-boost converter mainly contains 2 operation modes in one-period, is described below respectively:
Operation mode 1:
As shown in Figure 2 a, switching tube S is open-minded, the first diode D
1conducting, the second diode D
2with the 3rd diode D
3cut-off.Input power V
gwith intermediate energy storage capacitor C
1the common first power inductance L that gives
1charging, simultaneously input power V
ggive separately the second power inductance L
2charging, the first power inductance L
1with the second power inductance L
2energy storage, intermediate energy storage capacitor C
1release energy.Output capacitance C
2energy is provided to load R.
Under this operation mode, related electric parameter relationship formula is:
V
L1＝V
g+V
C1 （1）
V
L2＝V
g （2）
Wherein, V
grepresent input supply voltage, V
l1represent the both end voltage of the first power inductance L1 under this operation mode, V
l2represent the second power inductance L
2both end voltage under this operation mode, V
c1represent intermediate energy storage capacitor C
1both end voltage.
Operation mode 2:
As shown in Figure 2 b, switching tube S turn-offs, the second diode D
2with the 3rd diode current flow D
3, the first diode D
1cut-off.The second power inductance L
2through the second diode D
2to intermediate energy storage capacitor C
1release energy, intermediate energy storage capacitor C
1energy storage, the first power inductance L
1through the 3rd diode D
3afterflow, releases energy to output, output capacitance C
2energy storage.
Under this operation mode, related electric parameter relationship formula is:
V′
L1＝V
o-V
C1 （3）
V′
L2＝V
C1 （4）
Wherein, V
orepresent output voltage, V '
l1represent the first inductance L
1both end voltage under this operation mode, V '
l2represent the second inductance L
2both end voltage under this operation mode.
During converter steady operation, voltage gain is analyzed:
If the switch periods of switching tube work is T
s, duty ratio is D, 1 duration of operation mode is DT
s, 2 duration of operation mode are (1-D) T
s.According to inductance weber equilibrium response, can obtain:
V
L1DT
s＝V′
L1(1-D)T
s （5）
V
L2DT
s＝V′
L2(1-D)T
s （6）
Simultaneous formula (1)～formula (6) can obtain:
Can output thus, the voltage gain M of a kind of wide gain buck-boost converter described in the utility model is:
As shown in Figure 3, when duty ratio D changes in 0～0.8 scope, the gain of tradition buck-boost converter can only change in 0～4 scope, be that output voltage can only be 0～4 times of input voltage, and the gain of converter described in the utility model can change in 0～24 scope, the highest 24 times of can reach input voltage of output voltage, the gain of significantly having expanded traditional buck-boost converter.
Compared with prior art the utlity model has following advantage:
The utility model is without extra power switch pipe, simple in structure, and it is convenient to control;
The intrinsic characteristic of utilizing inductor-capacitor-diode network during the utility model work, when switching tube S turn-offs, the second power inductance is to L
2intermediate energy storage capacitor C
1charging, the first power inductance L
1to load R electric discharge, when switching tube S conducting, intermediate energy storage capacitor C
1with input power V
ggive the first power inductance L simultaneously
1charging, thus boosted output voltages is realized the expansion of converter output voltage gain in conjunction with the primary characteristic of traditional buck-boost circuit.
Above-described embodiment is preferably execution mode of the utility model; but execution mode of the present utility model is not limited by the examples; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection range of the present utility model.
Claims (2)
1. a wide gain buck-boost converter, is characterized in that: comprise input power (V
g), switching tube (S), the first power inductance (L
1), the second power inductance (L
2), intermediate energy storage electric capacity (C
1), output capacitance (C
2), the first diode (D
1), the second diode (D
2), the 3rd diode (D
3) and load (R);
The drain electrode of described switching tube (S) and input power (V
g) positive pole connect;
The source electrode of described switching tube (S) respectively with the first power inductance (L
1) one end, the first diode (D
1) anode and the 3rd diode (D
3) negative electrode connect;
Described the first power inductance (L
1) the other end respectively with intermediate energy storage electric capacity (C
1) one end and the second diode (D
2) anodic bonding;
Described the first diode (D
1) negative electrode respectively with the second diode (D
2) negative electrode and the second power inductance (L
2) one end connect;
Described the 3rd diode (D
3) anode respectively with output capacitance (C
2) one end be connected with one end of load (R);
Described intermediate energy storage electric capacity (C
1) the other end, the second power inductance (L
2) the other end, output capacitance (C
2) the other end and the other end and the input power (V of load (R)
g) negative pole connect.
2. a kind of wide gain buck-boost converter according to claim 1, is characterized in that: described the first diode (D
1), the second diode (D
2), the 3rd diode (D
3) be fast recovery diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320575121.XU CN203590024U (en) | 2013-09-16 | 2013-09-16 | Wide-gain buck-boost converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320575121.XU CN203590024U (en) | 2013-09-16 | 2013-09-16 | Wide-gain buck-boost converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203590024U true CN203590024U (en) | 2014-05-07 |
Family
ID=50587871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320575121.XU Withdrawn - After Issue CN203590024U (en) | 2013-09-16 | 2013-09-16 | Wide-gain buck-boost converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203590024U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490621A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Wide-gain buck-boost converter |
| WO2018024052A1 (en) * | 2016-08-04 | 2018-02-08 | 京东方科技集团股份有限公司 | Direct current-direct current converter, boosting unit, electric car, and battery-backup system |
| CN109194165A (en) * | 2018-10-18 | 2019-01-11 | 矽力杰半导体技术(杭州)有限公司 | AC-DC power converter |
-
2013
- 2013-09-16 CN CN201320575121.XU patent/CN203590024U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490621A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Wide-gain buck-boost converter |
| CN103490621B (en) * | 2013-09-16 | 2016-01-20 | 华南理工大学 | A kind of wide gain buck-boost converter |
| WO2018024052A1 (en) * | 2016-08-04 | 2018-02-08 | 京东方科技集团股份有限公司 | Direct current-direct current converter, boosting unit, electric car, and battery-backup system |
| US10277124B2 (en) | 2016-08-04 | 2019-04-30 | Boe Technology Group Co., Ltd. | DC-DC converter, boosting unit, electric vehicle and battery backup system |
| CN109194165A (en) * | 2018-10-18 | 2019-01-11 | 矽力杰半导体技术(杭州)有限公司 | AC-DC power converter |
| CN109194165B (en) * | 2018-10-18 | 2021-05-14 | 矽力杰半导体技术(杭州)有限公司 | AC-DC power converter |
| US11114931B2 (en) | 2018-10-18 | 2021-09-07 | Silergy Semiconductor Technology (Hangzhou) Ltd | AC-DC power converter |
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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 |