CN103490627B - A kind of wide gain cuk converter - Google Patents
A kind of wide gain cuk converter Download PDFInfo
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- CN103490627B CN103490627B CN201310423152.8A CN201310423152A CN103490627B CN 103490627 B CN103490627 B CN 103490627B CN 201310423152 A CN201310423152 A CN 201310423152A CN 103490627 B CN103490627 B CN 103490627B
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- inductance
- diode
- energy storage
- electric capacity
- intermediate energy
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Abstract
The invention provides a kind of wide gain cuk converter, mainly comprise a power switch pipe, three inductance, two intermediate energy storage electric capacity, an output capacitance, three diodes.The present invention utilizes the intrinsic characteristic of inductor-capacitor-diode network, when power switch pipe turns off, second inductance gives the first intermediate energy storage capacitor charging, first inductive discharge, when power switch pipe conducting, first intermediate energy storage electric capacity and input power give the first induction charging simultaneously, thus boosted output voltages, the primary characteristic in conjunction with traditional cuk converter realizes the expansion of converter output voltage gain.
Description
Technical field
The present invention relates to converters technical field, be specifically related to a kind of wide gain cuk converter.
Background technology
Along with life and industrial expansion, more and more higher to the requirement of converters, the cuk converter simultaneously with boosting and buck functionality obtains increasing application.But traditional cuk converter is due to its intrinsic characteristic, and the excursion of output voltage is less, usual output voltage can only be 0 ~ 9 times of input voltage.In the occasion that low pressure high input voltage exports, as distributed energy grid-connected system and uninterruptible power system, traditional cuk converter becomes no longer applicable.In order to expand the scope of application of traditional cuk converter, it may be necessary technological improvement and expanding its output voltage gain.Above-mentioned target can be realized by the method for cascade but the deficiencies such as the increase of power switch pipe quantity, stability of a system reduction and decrease in efficiency can be brought.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of wide gain cuk converter is provided.
The present invention is achieved through the following technical solutions:
A kind of wide gain cuk converter, mainly comprises input power, power switch pipe, the first inductance, the second inductance, the 3rd inductance, the first intermediate energy storage electric capacity, the second intermediate energy storage electric capacity, output capacitance, the first diode, the second diode, the 3rd diode and load.
The anode of described first diode is connected with one end of the first inductance and the positive pole of input power respectively;
The negative electrode of described first diode is connected with the negative electrode of the second diode and one end of the second inductance respectively;
The anode of described second diode is connected with the other end of the first inductance and one end of the first intermediate energy storage electric capacity respectively;
The drain electrode of described power switch pipe is connected with one end of the other end of the first intermediate energy storage electric capacity, the other end of the second inductance and the second intermediate energy storage electric capacity respectively;
The other end of described second intermediate energy storage electric capacity is connected with one end of the 3rd diode and the 3rd inductance respectively;
The other end of described 3rd inductance is connected with one end of output capacitance and one end of load respectively;
The source electrode of described power switch pipe, the negative electrode of the 3rd diode, the other end of output capacitance are all connected with the negative pole of input power with the other end of load.
Compared with prior art tool of the present invention has the following advantages:
The present invention is without the need to extra power switch pipe, and structure is simple, and it is convenient to control; The intrinsic characteristic of inductor-capacitor-diode network is utilized when the present invention works, when power switch pipe turns off, second inductance gives the first intermediate energy storage capacitor charging, first inductive discharge, when power switch pipe conducting, first intermediate energy storage electric capacity and input power give the first induction charging simultaneously, thus boosted output voltages, the primary characteristic in conjunction with traditional cuk converter realizes the expansion of converter output voltage gain.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the embodiment of a kind of wide gain cuk converter of the present invention;
Fig. 2 a, Fig. 2 b are the groundwork modal graph of circuit diagram shown in Fig. 1 in a switch periods respectively.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 in converter the part having electric current to flow through, and dotted line represents in converter the part not having electric current to flow through;
Fig. 3 is the gain contrast curve chart of converter of the present invention and traditional cuk converter.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, a kind of wide gain cuk converter, mainly comprises input power V
g, power switch tube S, the first inductance L
1, the second inductance L
2, the 3rd inductance L
3, the first intermediate energy storage electric capacity C
1, the second intermediate energy storage electric capacity C
2, output capacitance C
3, the first diode D
1, the second diode D
2, the 3rd diode D
3with load R.
Described first diode D
1anode respectively with the first inductance L
1one end and input power V
gpositive pole connect;
Described first diode D
1negative electrode respectively with the second diode D
2negative electrode and the second inductance L
2one end connect;
Described second diode D
2anode respectively with the first inductance L
1the other end and the first intermediate energy storage electric capacity C
1one end connect;
The drain electrode of described power switch tube S respectively with the first intermediate energy storage electric capacity C
1the other end, the second inductance L
2the other end and the second intermediate energy storage electric capacity C
2one end connect;
Described second intermediate energy storage electric capacity C
2the other end respectively with the 3rd diode D
3with the 3rd inductance L
3one end connect;
Described 3rd inductance L
3the other end respectively with output capacitance C
3one end be connected with one end of load R;
The source electrode of described power switch tube S, the 3rd diode D
3negative electrode, output capacitance C
3the other end and load R the other end all with input power V
gnegative pole connect.
As shown in Figure 2 a and 2 b, a kind of wide gain cuk converter mainly contains 2 operation modes in a switch periods, is described below respectively:
Operation mode 1:
As shown in Figure 2 a, power switch 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 the first intermediate energy storage electric capacity C
1common to the first inductance L
1charging, simultaneously input power V
ggive the second inductance L separately
2charging, the first inductance L
1with the second inductance L
2energy storage, the first intermediate energy storage electric capacity C
1release energy.Second intermediate energy storage electric capacity C
2released energy to load-side by power switch tube S, output capacitance C
3with the 3rd inductance L
3energy storage.
Under this operation mode, associated electrical parameters relational expression is:
V
L1＝V
g+V
C1（1）
V
L2＝V
g（2）
V
L3＝V
C2-V
o（3）
Wherein, V
grepresent input supply 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, V
l3represent the 3rd inductance L
3both end voltage under this operation mode, V
c1represent the first intermediate energy storage electric capacity C
1the voltage at two ends, V
c2represent the second intermediate energy storage electric capacity C
2the voltage at two ends, V
orepresent output voltage.
Operation mode 2:
As shown in Figure 2 b, power switch tube S turns off, the second diode D
2with the 3rd diode current flow D
3, the first diode D
1cut-off.Second inductance L
2through the second diode D
2to the first intermediate energy storage electric capacity C
1release energy, the first intermediate energy storage electric capacity C
1energy storage, the first inductance L
1through the 3rd diode D
3release energy, the second intermediate energy storage electric capacity C
2energy storage.Meanwhile, the 3rd inductance L
3through the 3rd diode D
3afterflow, releases energy to load R.
Under this operation mode, associated electrical parameters relational expression is:
V′
L1＝V
C2-V
C1-V
g（4）
V′
L2＝V
C1（5）
V′
L3＝V
o（6）
Wherein, 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, V '
l3represent the 3rd inductance L
3both end voltage under this operation mode.
During converter steady operation, voltage gain is analyzed:
If the switch periods of power switch pipe work is T
s, duty ratio is D, and namely operation mode 1 duration is DT
s, operation mode 2 duration is (1-D) T
s.According to inductance voltage-second balance characteristic, can obtain:
V
L1DT
s＝V′
L1(1-D)T
s（7）
V
L2DT
s＝V′
L2(1-D)T
s(8）
V
L3DT
s＝V′
L3(1-D)T
s（9）
Simultaneous formula (1) ~ formula (9) can obtain:
Can output thus, the voltage gain M of a kind of wide gain cuk converter of the present invention is:
As shown in Figure 3, when duty ratio D changes in 0 ~ 0.8 scope, the gain of tradition cuk converter can only change in 0 ~ 4 scope, namely output voltage can only be 0 ~ 4 times of input voltage, and the gain of converter of the present invention can change in 0 ~ 20 scope, the highest 20 times of can reach input voltage of output voltage, have significantly expanded the gain of traditional cuk converter.
Compared with prior art tool of the present invention has the following advantages:
The present invention is without the need to extra power switch pipe, and structure is simple, and it is convenient to control;
The intrinsic characteristic of inductor-capacitor-diode network is utilized when the present invention works, when power switch pipe turns off, the second inductance L
2to the first electric capacity C
1charging, the first inductance L
1electric discharge, when power switch pipe conducting, the first electric capacity C
1with input power V
ggive the first inductance L simultaneously
1charging, thus boosted output voltages, the primary characteristic in conjunction with traditional cuk converter realizes the expansion of converter output voltage gain.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not limited by the examples; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (2)
1. a wide gain cuk converter, is characterized in that: mainly comprise input power (V
g), power switch pipe (S), the first inductance (L
1), the second inductance (L
2), the 3rd inductance (L
3), the first intermediate energy storage electric capacity (C
1), the second intermediate energy storage electric capacity (C
2), output capacitance (C
3), the first diode (D
1), the second diode (D
2), the 3rd diode (D
3) and load (R);
Described first diode (D
1) anode respectively with the first inductance (L
1) one end and input power (V
g) positive pole connect;
Described first diode (D
1) negative electrode respectively with the second diode (D
2) negative electrode and the second inductance (L
2) one end connect;
Described second diode (D
2) anode respectively with the first inductance (L
1) the other end and the first intermediate energy storage electric capacity (C
1) one end connect;
The drain electrode of described power switch pipe (S) respectively with the first intermediate energy storage electric capacity (C
1) the other end, the second inductance (L
2) the other end and the second intermediate energy storage electric capacity (C
2) one end connect;
Described second intermediate energy storage electric capacity (C
2) the other end respectively with the 3rd diode (D
3) and the 3rd inductance (L
3) one end connect;
Described 3rd inductance (L
3) the other end respectively with output capacitance (C
3) one end be connected with one end of load (R);
The source electrode of described power switch pipe (S), the 3rd diode (D
3) negative electrode, output capacitance (C
3) the other end and load (R) the other end all with input power (V
g) negative pole connect.
2. one according to claim 1 wide gain cuk converter, is characterized in that: described 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 |
|---|---|---|---|
| CN201310423152.8A CN103490627B (en) | 2013-09-16 | 2013-09-16 | A kind of wide gain cuk converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310423152.8A CN103490627B (en) | 2013-09-16 | 2013-09-16 | A kind of wide gain cuk converter |
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| Publication Number | Publication Date |
|---|---|
| CN103490627A CN103490627A (en) | 2014-01-01 |
| CN103490627B true CN103490627B (en) | 2016-04-13 |
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|---|---|---|---|---|
| CN107070212A (en) * | 2017-06-19 | 2017-08-18 | 广东工业大学 | A kind of back-pressure type active impedance network booster system |
| CN111092548B (en) * | 2019-12-24 | 2021-04-27 | 燕山大学 | High-gain Cuk direct-current converter with inductance-capacitance switch network |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882869A (en) * | 2010-06-21 | 2010-11-10 | 华南理工大学 | High-gain boost converter with inductance-capacitance switching network |
| CN203590029U (en) * | 2013-09-16 | 2014-05-07 | 华南理工大学 | Wide-gain cuk converter |
-
2013
- 2013-09-16 CN CN201310423152.8A patent/CN103490627B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882869A (en) * | 2010-06-21 | 2010-11-10 | 华南理工大学 | High-gain boost converter with inductance-capacitance switching network |
| CN203590029U (en) * | 2013-09-16 | 2014-05-07 | 华南理工大学 | Wide-gain cuk converter |
Non-Patent Citations (2)
| Title |
|---|
| Switched-capacitor/switched-inductor structures for getting transformerless hybrid dc-dc PWM converters;Axelrod, Boris et al;《IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS》;20080330;第55卷(第2期);正文第691页右栏倒数第3段至第692页、图16 * |
| 一种具有高电压传输比的新型Cuk矩阵变换器;***等;《中国工程学》;20081231;第10卷(第4期);正文第78页、图1 * |
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| CN103490627A (en) | 2014-01-01 |
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