CN102290985A - Coupling inductor based voltage boosting and reducing direct current (DC) converter - Google Patents
Coupling inductor based voltage boosting and reducing direct current (DC) converter Download PDFInfo
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- CN102290985A CN102290985A CN2011102303166A CN201110230316A CN102290985A CN 102290985 A CN102290985 A CN 102290985A CN 2011102303166 A CN2011102303166 A CN 2011102303166A CN 201110230316 A CN201110230316 A CN 201110230316A CN 102290985 A CN102290985 A CN 102290985A
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Abstract
The invention relates to a coupling inductor based voltage boosting and reducing direct current (DC) converter, belonging to voltage boosting and reducing DC converters with a wide input voltage range. The coupling inductor based voltage boosting and reducing DC converter comprises an input power supply (Vin), a first capacitor (C1), a first coupling inductor (Lc1), a first switching tube (Q1), a second switching tube (Q2), a first capacitor (C2), a third switching tube (Q3), a fourth switching tube (Q4), a second coupling inductor (Lc2), a third capacitor (C3) and a load (Ro), wherein the first coupling inductor (Lc1) and the second coupling inductor (Lc2) are mutually coupled together through sharing one inductor magnetic core. The inductor-coupling voltage boosting and reducing DC converter provided by the invention has continuous input/output currents, input/output inductors share the magnetic core, and the converter has a small volume and light weight and high power density, so that the coupling inductor based voltage boosting and reducing DC converter is particularly suitable for occasions with voltage boosting and reducing conversion in a wide input voltage range, large electric current and low pulsation of input/output current.
Description
Technical field
The present invention relates to a kind of coupling inductance buck DC converter, belong to the buck DC converter of wide input voltage range.
Background technology
Energy crisis and problem of environmental pollution are serious day by day, and the development and utilization of novel energy is subjected to the attention of countries in the world.Need adopt DC converter in occasions such as heat energy thermo-electric generation, charge in batteries with buck characteristic.Developing a kind of buck DC converter with high efficiency, high power density, wide input voltage range has important practical significance.
Traditional single tube buck-boost converter such as Buck-Boost, Flyback, SEPIC and Cuk converter etc. all have the function of buck conversion, but their stresses of parts is higher, volume and weight is bigger.Particularly Buck-Boost and Cuk converter, the polarity of its output voltage is opposite with input voltage, has limited their application in some occasion more.
Boost and the cascade of Buck converter can constitute two kinds of buck-boost converters, shown in accompanying drawing 1 (a) and accompanying drawing 1 (b).The converter of Buck cascade Boost shown in the accompanying drawing 1 (a) is owing to topological structure has succinctly obtained more application, but its inductance is in the centre, when working in decompression mode, input current is interrupted, when working in boost mode, output current is interrupted, is not suitable for the big electric current of output such as heat generating, charge in batteries and requires the very little application scenario of current pulsation.The converter of Boost cascade Buck shown in the accompanying drawing 1 (b) inductance is distributed in two ends, and the input and output electric current is continuous, but needs to adopt two inductance, and volume and weight is bigger, thereby has reduced power density of transform.
Summary of the invention
The present invention proposes a kind of coupling inductance buck DC converter, can realize the conversion of wide input voltage range buck, the input and output electric current is continuous when working simultaneously, has improved transducer effciency and power density effectively.
The present invention adopts following technical scheme for solving its technical problem:
A kind of coupling inductance buck DC converter comprises input power supply, first electric capacity, first coupling inductance, first switching tube, second switch pipe, second electric capacity, the 3rd switching tube, the 4th switching tube, second coupling inductance, the 3rd electric capacity and load; Wherein, an end of the input positive output end of power supply and first electric capacity, first coupling inductance
End links to each other, first coupling inductance
End links to each other with the drain electrode of first switching tube, the source electrode of second switch pipe, and the drain electrode of second switch pipe links to each other with an end of second electric capacity, the drain electrode of the 3rd switching tube, the drain electrode of the source electrode of the 3rd switching tube and the 4th switching tube, second coupling inductance
End links to each other, second coupling inductance
End links to each other with an end of the 3rd electric capacity, an end of load, and the other end of load links to each other with the other end of the 3rd electric capacity, the source electrode of the 4th switching tube, the other end of second electric capacity, the source electrode of first switching tube, the other end of first electric capacity and the negative output terminal of input power supply.
Described first coupling inductance intercouples by a shared inductance core with second coupling inductance and is in the same place, first coupling inductance
The end and second coupling inductance
End is end of the same name.
Beneficial effect of the present invention is as follows:
Coupling inductance buck DC converter of the present invention, be actually by Boost converter and the cascade of Buck converter and the shared magnetic core of input and output inductance and constituted, especially be fit to the conversion of wide input voltage range buck, big electric current and require the little applications of input and output current pulsation.By the reverse coupled of input and output inductance, can reduce D.C. magnetic biasing magnetic flux in the coupling inductance magnetic core effectively, improve the utilance of magnetic core, help reducing the loss and the volume of magnetic element, and then improve power density of transform.
Description of drawings
Fig. 1 (a) is Buck cascade Boost buck-boost converter circuit theory diagrams; Fig. 1 (b) is Boost cascade Buck buck-boost converter circuit theory diagrams.
Fig. 2 is coupling inductance buck-boost converter embodiment one circuit theory diagrams of the present invention.
Fig. 3 (a) is coupling inductance buck-boost converter embodiment two circuit theory diagrams of the present invention; Fig. 3 (b) is a coupling inductance buck-boost converter embodiment three-circuit schematic diagram of the present invention; Fig. 3 (c) is coupling inductance buck-boost converter embodiment four circuit theory diagrams of the present invention.
Fig. 4 (a) is equivalent circuit theory diagrams under the coupling inductance buck-boost converter embodiment one Boost pattern of the present invention; Fig. 4 (b) is equivalent circuit theory diagrams under the coupling inductance buck-boost converter embodiment one Buck pattern of the present invention.
Fig. 5 (a) is operation mode 1 equivalent circuit theory figure under the coupling inductance buck-boost converter embodiment one Boost pattern of the present invention; Fig. 5 (b) is operation mode 2 equivalent circuit theory figure under the coupling inductance buck-boost converter embodiment one Boost pattern of the present invention.
Fig. 6 (a) is operation mode 1 equivalent circuit theory figure under the coupling inductance buck-boost converter embodiment one Buck pattern of the present invention; Fig. 6 (b) is operation mode 2 equivalent circuit theory figure under the coupling inductance buck-boost converter embodiment one Buck pattern of the present invention.
Wherein: V
InBe the input power supply; L
C1, L
C2Be respectively first, second coupling inductance;
,
Be respectively coupling inductance L
C1, L
C2The two ends of coil windings; Q
1--Q
4Be power switch pipe or power diode; C
1--C
3Be electric capacity; R
oBe load.
Embodiment
Below in conjunction with accompanying drawing the invention is described in further details.
As shown in Figure 2, be the circuit theory diagrams of coupling inductance buck DC converter embodiment one of the present invention: its structure comprises input power supply V
In, first capacitor C
1, the first coupling inductance L
C1, the first switching tube Q
1, second switch pipe Q
2, second capacitor C
2, the 3rd switching tube Q
3, the 4th switching tube Q
4, the second coupling inductance L
C2, the 3rd capacitor C
3With load R
o, wherein: input power supply V
InThe positive output end and first capacitor C
1An end, the first coupling inductance L
C1 End links to each other, the first coupling inductance L
C1 
The end and the first switching tube Q
1Drain electrode, second switch pipe Q
2Source electrode link to each other second switch pipe Q
2The drain electrode and second capacitor C
2An end, the 3rd switching tube Q
3Drain electrode link to each other the 3rd switching tube Q
3Source electrode and the 4th switching tube Q
4Drain electrode, the second coupling inductance L
C2 
End links to each other, the second coupling inductance L
C2 
End and the 3rd capacitor C
3An end, load R
oAn end link to each other load R
oThe other end and the 3rd capacitor C
3The other end, the 4th switching tube Q
4Source electrode, second capacitor C
2The other end, the first switching tube Q
1Source electrode, first capacitor C
1The other end and input power supply V
InNegative output terminal link to each other.The described first coupling inductance L
C1With the second coupling inductance L
C2Intercouple together and the first coupling inductance L by a shared inductance core
C1 
The end and the second coupling inductance L
C2 
End is end of the same name.
Coupling inductance buck DC converter of the present invention is in embodiment, according to second switch pipe Q
2With the 4th switching tube Q
4Implementation different and have a numerous embodiments.Second switch pipe Q
2With the 4th switching tube Q
4Can be power switch pipe, also can be power diode, second switch pipe Q in embodiment illustrated in fig. 2
2With the 4th switching tube Q
4Be power switch pipe, the circuit theory diagrams of other three kinds of execution modes as shown in Figure 3.Wherein, second switch pipe Q in Fig. 3 (a) illustrated embodiment two
2Be power switch pipe, the 4th switching tube Q
4Be power diode; Second switch pipe Q in Fig. 3 (b) illustrated embodiment three
2Be power diode, the 4th switching tube Q
4Be power switch pipe; Second switch pipe Q in Fig. 3 (c) illustrated embodiment four
2With the 4th switching tube Q
4Be power diode.
Be example with circuit theory diagrams shown in the embodiment one below, in conjunction with the accompanying drawings 2 and accompanying drawing 4 ~ 6, the course of work of coupling inductance buck-boost converter of the present invention is described.
According to input, output voltage magnitude relationship, the coupling inductance buck-boost converter can have Boost and two kinds of mode of operations of Buck.Switching tube Q
1, Q
3Duty ratio be designated as d1, d2 respectively, output voltage is designated as Vo, then under the continuous situation of inductive current, input when converter work enters stable state, output voltage close and are:
| ? | (1) |
When Vin＜Vo, converter is operated in the Boost pattern, at this moment, and Q
1Be on off state, Q
3Conducting always, Q
4Turn-off, its equivalent electric circuit is shown in Fig. 4 (a) always; As Vin〉during Vo, converter is operated in the Buck pattern, at this moment, Q
3Be on off state, Q
1Turn-off Q always
2Conducting always, its equivalent electric circuit is shown in Fig. 4 (b).
Be the switch mode of example analytic transformation device below with the Boost mode of operation, first, second coupling inductance L
C1, L
C2Electric current be designated as iL1, iL2 respectively, self-induction is respectively L1, L2, Lm is a magnetizing inductance, k is a coupling coefficient.
| ? |
 |
(2) |
Formula (2) shows: at Q
1Conduction period, current i L1, iL2 increase in the acting in conjunction lower linear of input voltage, self-induction and mutual inductance.
| ? |
 |
(3) |
Formula (3) shows: at switching tube Q
1Blocking interval, current i L1, iL2 reduce in the acting in conjunction lower linear of input voltage, output voltage, self-induction and mutual inductance.
The switch mode of Buck mode of operation downconverter and job analysis and Boost mode of operation are similar, do not repeat them here, and the switch mode equivalent circuit diagram of Buck mode of operation downconverter as shown in Figure 6.
Coupling inductance buck DC converter of the present invention, its first coupling inductance L
C1With the second coupling inductance L
C2Intercouple together and the first coupling inductance L by a shared inductance core
C1 The end and the second coupling inductance L
C2 
End is end of the same name.By the reverse coupled mode, can reduce D.C. magnetic biasing magnetic flux in the coupling inductance magnetic core effectively, improve the utilance of magnetic core, help reducing loss and the volume and then the raising power density of transform of magnetic element.
Coupling inductance buck DC converter of the present invention input and output altogether, the input and output electric current is continuous, the shared magnetic core of input and output inductance, converter volume weight is little, power density is high, especially is fit to the conversion of wide input voltage range buck, big electric current and requires the little applications of input and output current pulsation.
Claims (1)
1. a coupling inductance buck DC converter comprises input power supply (V
In), the first electric capacity (C
1), the first coupling inductance (L
C1), the first switching tube (Q
1), second switch pipe (Q
2), the second electric capacity (C
2), the 3rd switching tube (Q
3), the 4th switching tube (Q
4), the second coupling inductance (L
C2), the 3rd electric capacity (C
3) and load (R
o); Wherein, input power supply (V
In) the positive output end and the first electric capacity (C
1) an end, the first coupling inductance (L
C1)
End links to each other, the first coupling inductance (L
C1)
The end and the first switching tube (Q
1) drain electrode, second switch pipe (Q
2) source electrode link to each other second switch pipe (Q
2) the drain electrode and the second electric capacity (C
2) an end, the 3rd switching tube (Q
3) drain electrode link to each other the 3rd switching tube (Q
3) source electrode and the 4th switching tube (Q
4) drain electrode, the second coupling inductance (L
C2)
End links to each other, the second coupling inductance (L
C2)
End and the 3rd electric capacity (C
3) an end, load (R
o) an end link to each other load (R
o) the other end and the 3rd electric capacity (C
3) the other end, the 4th switching tube (Q
4) source electrode, the second electric capacity (C
2) the other end, the first switching tube (Q
1) source electrode, the first electric capacity (C
1) the other end and input power supply (V
In) negative output terminal link to each other, it is characterized in that described first the coupling inductance ((L
C1) and the second coupling inductance (L
C2) intercouple together first the coupling inductance ((L by a shared inductance core
C1)
The end and the second coupling inductance (L
C2)
End is end of the same name.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102303166A CN102290985A (en) | 2011-08-12 | 2011-08-12 | Coupling inductor based voltage boosting and reducing direct current (DC) converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102303166A CN102290985A (en) | 2011-08-12 | 2011-08-12 | Coupling inductor based voltage boosting and reducing direct current (DC) converter |
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|---|---|
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|---|---|---|---|
| CN2011102303166A Pending CN102290985A (en) | 2011-08-12 | 2011-08-12 | Coupling inductor based voltage boosting and reducing direct current (DC) converter |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312153A (en) * | 2012-03-12 | 2013-09-18 | 南京航空航天大学 | Parallel multi input coupled inductor buck and boost converter |
| CN103560666A (en) * | 2013-11-14 | 2014-02-05 | 南京集能易新能源技术有限公司 | Four-switch voltage boosting and reducing converter with low ripples and control method thereof |
| CN105207477A (en) * | 2015-09-02 | 2015-12-30 | 南京航空航天大学 | Bidirectional three-port non-isolated DC converter and control method thereof |
| CN106533163A (en) * | 2016-01-22 | 2017-03-22 | 东莞市清能光伏科技有限公司 | Photovoltaic power converter |
| CN106972573A (en) * | 2017-04-24 | 2017-07-21 | 深圳市永联科技股份有限公司 | A kind of super capacitor charging system based on battery |
| CN106992675A (en) * | 2017-05-09 | 2017-07-28 | 辽宁工程技术大学 | A kind of switched inductors capacitance group and unit supercharging high voltage gain DC converter |
| CN109327139A (en) * | 2018-11-13 | 2019-02-12 | 广州金升阳科技有限公司 | A kind of step-up/step-down circuit |
| CN109474182A (en) * | 2018-11-12 | 2019-03-15 | 浙江工业大学 | A kind of cascade buck-boost type DC-DC converter |
| CN112350573A (en) * | 2020-11-13 | 2021-02-09 | 福州大学 | Boost-improved Boost gain Cuk converter single-switch DC-DC circuit |
| CN114172366A (en) * | 2022-01-24 | 2022-03-11 | 澳门大学 | DC converter and electronic device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312153B (en) * | 2012-03-12 | 2016-04-27 | 南京航空航天大学 | A kind of parallel multi input coupling inductance buck-boost converter |
| CN103312153A (en) * | 2012-03-12 | 2013-09-18 | 南京航空航天大学 | Parallel multi input coupled inductor buck and boost converter |
| CN103560666A (en) * | 2013-11-14 | 2014-02-05 | 南京集能易新能源技术有限公司 | Four-switch voltage boosting and reducing converter with low ripples and control method thereof |
| CN105207477B (en) * | 2015-09-02 | 2017-12-15 | 南京航空航天大学 | The non-isolated DC converter in two-way three port and its control method |
| CN105207477A (en) * | 2015-09-02 | 2015-12-30 | 南京航空航天大学 | Bidirectional three-port non-isolated DC converter and control method thereof |
| CN106533163A (en) * | 2016-01-22 | 2017-03-22 | 东莞市清能光伏科技有限公司 | Photovoltaic power converter |
| CN106972573A (en) * | 2017-04-24 | 2017-07-21 | 深圳市永联科技股份有限公司 | A kind of super capacitor charging system based on battery |
| CN106992675A (en) * | 2017-05-09 | 2017-07-28 | 辽宁工程技术大学 | A kind of switched inductors capacitance group and unit supercharging high voltage gain DC converter |
| CN109474182A (en) * | 2018-11-12 | 2019-03-15 | 浙江工业大学 | A kind of cascade buck-boost type DC-DC converter |
| CN109327139A (en) * | 2018-11-13 | 2019-02-12 | 广州金升阳科技有限公司 | A kind of step-up/step-down circuit |
| CN112350573A (en) * | 2020-11-13 | 2021-02-09 | 福州大学 | Boost-improved Boost gain Cuk converter single-switch DC-DC circuit |
| CN114172366A (en) * | 2022-01-24 | 2022-03-11 | 澳门大学 | DC converter and electronic device |
| CN114172366B (en) * | 2022-01-24 | 2023-12-15 | 澳门大学 | DC converter and electronic device |
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Application publication date: 20111221 |