CN109309448A - A kind of wide output Cuk DC-DC converter of wide input - Google Patents
A kind of wide output Cuk DC-DC converter of wide input Download PDFInfo
- Publication number
- CN109309448A CN109309448A CN201811393711.4A CN201811393711A CN109309448A CN 109309448 A CN109309448 A CN 109309448A CN 201811393711 A CN201811393711 A CN 201811393711A CN 109309448 A CN109309448 A CN 109309448A
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- 239000003990 capacitor Substances 0.000 claims abstract description 47
- 230000005611 electricity Effects 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/005—Conversion of dc power input into dc power output using Cuk converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention proposes a kind of wide output Cuk DC-DC converter of wide input.Mentioned converter enhances beneficial expanding element with several by basic Cuk converter and forms.It enhances beneficial expanding element to be made of an inductance, two capacitors and a diode, the adjusting to converter input and output gain and switching device voltage stress can be realized by the number that adjusting enhances beneficial expanding element.Mentioned converter has the advantages such as control and simple, wide, the switching device voltage stress of input and output voltage adjustable range of driving circuit, is more suited to input or the biggish application of output voltage variation range.
Description
Technical field
The present invention relates to a kind of wide input and output buck DC/DC converter, specifically a kind of wide wide output Cuk of input
DC-DC converter.
Background technique
The biggish application of voltage change is being output and input, input voltage could possibly be higher than output voltage, can also
Output voltage can be lower than, applicable common non-isolation type step-up/step-down dc-dc converter has Buck-Boost, Cuk, Sepic at this time
And Zeta circuit.Theoretically by adjusting duty ratio D, the input and output gain of these converters can be zero to infinity
Between change, but influenced by component and circuit parasitic parameter, the boost capability of these converters has been more limited.Mesh
The preceding scheme for improving DC-DC converter input and output gain is based on Boost circuit more and constructs, thus these circuits are typically only capable to
It realizes boosting, can not achieve decompression, be difficult to be applicable in outputting and inputting the biggish application of voltage change.Therefore it studies and is
High gain boost can be achieved, while can also realize that the novel wide input and output buck DC/DC converter of decompression has important meaning
Justice.
Summary of the invention
It cannot realize that high gain boost is asked with what is be depressured simultaneously to solve existing non-isolation type high-gain DC-DC converter
Topic, the present invention is based on basic Cuk circuits to propose a kind of wide input and output buck DC/DC converter.
The technical scheme adopted by the invention is as follows:
A kind of wide output Cuk DC-DC converter of wide input, the converter include a direct current input source, a load
RL, a basic Cuk converter, n expanding element.Wherein:
Basic Cuk converter includes two inductance L1、L2, two capacitor C1、C2, a power switch S1, a diode
D1.Its type of attachment is as follows: inductance L1Left end connect the anode of input power, right end connects power switch S1Drain electrode and electricity
Hold C1Left end, capacitor C1Right end and inductance L2Left end and diode D1Anode be connected, inductance L2Right end and capacitor
C2Upper end be connected, power switch S1Source electrode, diode D1Cathode and capacitor C2Lower end and the cathode phase of input power
Even.
The component of n expanding element and internal type of attachment are all the same, illustrate by taking i-th of expanding element as an example, contain
Have: an inductance Li1, a diode Di1, two capacitor Ci1、Ci2.Wherein capacitor Ci1Right end and inductance Li1Left end and
Diode Di1Anode be connected, inductance Li1Right end and capacitor Ci2Upper end be connected.
Type of attachment between each expanding element is following (1 < i≤n): capacitor C in (i-1)-th expanding element(i-1)1The right side
End, inductance L(i-1)1Left end and diode D(i-1)1The connected intersection point and i-th of expanding element of anode in capacitor Ci1A left side
End is connected, inductance L in (i-1)-th expanding element(i-1)1Right end and capacitor C(i-1)2The connected intersection point in upper end extended with i-th
Diode D in uniti1Cathode be connected, capacitor C in (i-1)-th expanding element(i-1)2Lower end and electricity in i-th expanding element
Hold Ci2Lower end and input power cathode be connected.
Connection relationship between 1st expanding element and basic Cuk converter is as follows: capacitor C in basic Cuk converter1
Right end and inductance L2Left end and diode D1The connected intersection point and the 1st expanding element of anode in capacitor C11Left end
It is connected, inductance L in basic Cuk converter2Right end and capacitor C2The connected intersection point and the 1st expanding element in upper end in two poles
Pipe D11Cathode be connected.
Load RLBoth ends and capacitor C in n-th expanding elementn2Both ends be connected.
Power switch S1Grid connect its controller, duty ratio can change between 0 to 1.
A kind of wide input and output buck DC/DC converter of the present invention, technical effect are as follows:
1, buck, and input and output high gain can be achieved at the same time, switching device voltage stress is low.(inductance specific as follows
L1Electric current when being continuously turned on):
Input and output gain are as follows:
Switch tube voltage stress are as follows:
Wherein D is duty ratio, uinFor input voltage, uoFor output voltage, usFor power switching voltage stress, n is extension
Element number.
2, only contain 1 power switch, control strategy and driving circuit are simple.
Detailed description of the invention
Fig. 1 is circuit diagram of the present invention.
Fig. 2 be expanding element number of the present invention be 1 when circuit topology figure.
Fig. 3 is traditional Cuk converter circuit schematic diagram
Fig. 4 be expanding element number of the present invention be 1 when input and output gain and tradition Cuk converter input and output gain
Comparison diagram.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
It is illustrated in figure 2 circuit topology figure when expanding element number of the present invention is 1:
A kind of wide output Cuk DC-DC converter of wide input, the converter include a direct current input source, a load
RL, a basic Cuk converter, an expanding element.Wherein:
Basic Cuk converter includes two inductance L1、L2, two capacitor C1、C2, a power switch S1, a diode
D1.Its type of attachment is as follows: inductance L1Left end connect the anode of input power, right end connects power switch S1Drain electrode and electricity
Hold C1Left end, capacitor C1Right end and inductance L2Left end and diode D1Anode be connected, inductance L2Right end and capacitor
C2Upper end be connected, power switch S1Source electrode, diode D1Cathode and capacitor C2Lower end and the cathode phase of input power
Even.
Expanding element contains: an inductance L11, a diode D11, two capacitor C11、C12.Wherein capacitor C11Right end
With inductance L11Left end and diode D11Anode be connected, inductance L11Right end and capacitor C12Upper end be connected, capacitor C12
Lower end be connected with the cathode of input power.
Connection relationship between expanding element and basic Cuk converter is as follows: capacitor C in basic Cuk converter1Right end
With inductance L2Left end and diode D1The connected intersection point and expanding element of anode in capacitor C11Left end be connected, substantially
Inductance L in Cuk converter2Right end and capacitor C2The connected intersection point and expanding element in upper end in diode D11Cathode phase
Even.
Load RLBoth ends and expanding element in capacitor C12Both ends be connected.
Power switch S1Grid connect its controller, duty ratio can change between 0 to 1.
In inductance L1Electric current when being continuously turned on, according to the difference of power switch state, circuit can be divided into 2 kinds of work
State:
(1) power switch S1Conducting, diode D1、D11It is turned off, at this time inductance L1、L2、L11, capacitor C2、C12Charging, electricity
Hold C1、C11Electric discharge;Inductance L1、L2、L11End voltage is shown below:
(2) power switch S1Shutdown, diode D1、D11It is both turned on, at this time inductance L1、L2、L11, capacitor C2、C12Electric discharge, electricity
Hold C1、C11Charging;Inductance L1、L2、L11End voltage is shown below:
Above-mentioned embodiment of the invention is only example to illustrate the invention, and is not to reality of the invention
Apply the restriction of mode.For those of ordinary skill in the art, other can also be made on the basis of the above description
Various forms of variations and variation.Here all embodiments can not be exhaustive.It is all to belong to technical side of the invention
Case, changes and variations that derived from are still in the scope of protection of the present invention.
Claims (2)
1. a kind of wide output Cuk DC-DC converter of wide input, it is characterised in that: the converter includes a direct current input source,
One load RL, a basic Cuk converter, n expanding element;Wherein:
Basic Cuk converter includes two inductance L1、L2, two capacitor C1、C2, a power switch S1, a diode D1;Its
Type of attachment is as follows: inductance L1Left end connect the anode of input power, right end connects power switch S1Drain electrode and capacitor C1's
Left end, capacitor C1Right end and inductance L2Left end and diode D1Anode be connected, inductance L2Right end and capacitor C2It is upper
End is connected, power switch S1Source electrode, diode D1Cathode and capacitor C2Lower end be connected with the cathode of input power;
The component of n expanding element and internal type of attachment are all the same, illustrate by taking i-th of expanding element as an example, contain: one
A inductance Li1, a diode Di1, two capacitor Ci1、Ci2;Wherein capacitor Ci1Right end and inductance Li1Left end and two poles
Pipe Di1Anode be connected, inductance Li1Right end and capacitor Ci2Upper end be connected;
Type of attachment between each expanding element is as follows, capacitor C in 1 < i≤n: the (i-1)-th expanding element(i-1)1Right end, electricity
Feel L(i-1)1Left end and diode D(i-1)1The connected intersection point and i-th of expanding element of anode in capacitor Ci1Left end phase
Even, inductance L in (i-1)-th expanding element(i-1)1Right end and capacitor C(i-1)2The connected intersection point and i-th of expanding element in upper end
Middle diode Di1Cathode be connected, capacitor C in (i-1)-th expanding element(i-1)2Lower end and capacitor C in i-th expanding elementi2
Lower end and input power cathode be connected;
Connection relationship between 1st expanding element and basic Cuk converter is as follows: capacitor C in basic Cuk converter1Right end
With inductance L2Left end and diode D1The connected intersection point and the 1st expanding element of anode in capacitor C11Left end be connected,
Inductance L in basic Cuk converter2Right end and capacitor C2The connected intersection point and the 1st expanding element in upper end in diode D11
Cathode be connected;
Load RLBoth ends and capacitor C in n-th expanding elementn2Both ends be connected.
2. a kind of wide output Cuk DC-DC converter of wide input according to claim 1, it is characterised in that: power switch S1's
Grid connects its controller, and duty ratio can change between 0 to 1.
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CN201811393711.4A CN109309448B (en) | 2018-11-21 | 2018-11-21 | Wide-input wide-output Cuk DC-DC converter |
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CN201811393711.4A CN109309448B (en) | 2018-11-21 | 2018-11-21 | Wide-input wide-output Cuk DC-DC converter |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111431399A (en) * | 2020-04-30 | 2020-07-17 | 三峡大学 | Novel expandable Cuk DC-DC converter |
CN111786555A (en) * | 2020-07-22 | 2020-10-16 | 福州大学 | Zero-ripple high-gain DC-DC converter based on novel boosting unit |
CN113965085A (en) * | 2021-10-11 | 2022-01-21 | 三峡大学 | Single-input high-reliability capacitor current consistent Cuk DC-DC converter |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111431399A (en) * | 2020-04-30 | 2020-07-17 | 三峡大学 | Novel expandable Cuk DC-DC converter |
CN111431399B (en) * | 2020-04-30 | 2023-06-02 | 三峡大学 | Scalable Cuk DC-DC converter |
CN111786555A (en) * | 2020-07-22 | 2020-10-16 | 福州大学 | Zero-ripple high-gain DC-DC converter based on novel boosting unit |
CN111786555B (en) * | 2020-07-22 | 2021-11-02 | 福州大学 | Zero-ripple high-gain DC-DC converter based on novel boosting unit |
CN113965085A (en) * | 2021-10-11 | 2022-01-21 | 三峡大学 | Single-input high-reliability capacitor current consistent Cuk DC-DC converter |
CN113965085B (en) * | 2021-10-11 | 2023-10-27 | 三峡大学 | Single-input high-reliability capacitance-current consistent Cuk DC-DC converter |
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