CN103312153B - A kind of parallel multi input coupling inductance buck-boost converter - Google Patents
A kind of parallel multi input coupling inductance buck-boost converter Download PDFInfo
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- CN103312153B CN103312153B CN201210063240.7A CN201210063240A CN103312153B CN 103312153 B CN103312153 B CN 103312153B CN 201210063240 A CN201210063240 A CN 201210063240A CN 103312153 B CN103312153 B CN 103312153B
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- 230000009467 reduction Effects 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 230000008859 change Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 3
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Abstract
The invention discloses a kind of parallel multi input coupling inductance buck-boost converter, belong to Technics of Power Electronic Conversion technical field.This converter is made up of N number of booster circuit, 1 reduction voltage circuit (20) and load, N be greater than 1 natural number, each booster circuit is all be made up of input source, filter inductance, switching tube, diode and filter capacitor, reduction voltage circuit is made up of switching tube, diode, filter inductance and filter capacitor, the output of N number of booster circuit is connected in parallel, then be connected with the input of reduction voltage circuit (20), the output of reduction voltage circuit (20) is connected with load, and the filter inductance of N number of booster circuit is coupled with the filter inductance of reduction voltage circuit respectively.Converter of the present invention can realize multiple input source and power to the load simultaneously, and can realize the buck conversion between input and output, and filter inductance is coupled to each other, and converter volume is little, and different input source and load-side can independently control separately, controls simple.
Description
Technical field
The present invention relates to a kind of parallel multi input coupling inductance buck-boost converter, belong to converters technical field, the power inverter technical field particularly in technical field of new energy power generation.
Background technology
Along with energy crisis and problem of environmental pollution are day by day serious, the development and utilization of the new and renewable sources of energies such as solar energy, wind energy, fuel cell obtains paying close attention to more and more widely, and distributed generation system has become the focus that countries in the world are paid close attention to and studied.And the intrinsic defect of generation of electricity by new energy equipment brings some a new difficult problem and challenges, as: the response speed of fuel cell is relatively slower, and power output can not the change of tracking in time load; Wind energy, solar power generation can not continue owing to being subject to the impact of the natural conditions changes such as wind speed, wind direction, intensity of sunshine, ambient temperature, stable output electric energy, cause the increase of system instability.Therefore, in order to ensure continuous reliably powering load, usually need multiple new forms of energy to be bonded to each other, have complementary advantages and form joint distributed electric power system.
Due in distributed power supply system containing multiple input source, the voltage of often kind of input source is also unstable, therefore needs straight conversion that the output voltage that input source is relatively unstable is converted into stable voltage for load.Straight convertor can be divided into two classes by input source number: single input straight convertor and multi input straight convertor.In some middle low power occasions and the close occasion of generation of electricity by new energy device, if use multiple single input straight convertor, structure can be made to become complicated and cost is higher.In this occasion, a multi input straight convertor can be used to replace multiple single input straight convertor.In addition, the output voltage of the generation of electricity by new energy equipment such as heat energy thermoelectric cell, photovoltaic cell, fuel cell with the change of environmental condition in wide range inner conversion, and the energy storage device such as storage battery, super capacitor is along with the difference of charging and discharging state, its terminal voltage, also in very wide scope inner conversion, therefore needs a kind of buck straight convertor that can adapt to the change of input voltage wide region.
In buck-boost converter, the investigation and application that the buck-boost converter be made up of Buck converter and Boost cascade is more because plurality of advantages obtains.Document " Ren little Yong; Tang Zhao; Ruan Xinbo; etc. a kind of four switch Buck-Boost converters [J] of novelty. Proceedings of the CSEE; 2008,28 (21): 15-19. " buck-boost converter be made up of Buck converter and Boost cascade studied only comprises an inductance, and topological structure is simple, but input and output side discontinuous current, is not suitable for the application scenario to ripple sensitivity such as heat energy thermo-electric generation, fuel cell; The buck-boost converter input and output current continuity that document " Rae-YoungKimandJih-ShengLai.Aseamlessmodetransfermaximum powerpointtrackingcontrollerforthermoelectricgeneratorap plications [J] .IEEETransactionsonpowerelectronics; 2008; 24 (5): 2310-2318. " is studied, but comprise two independently inductance, converter volume weight is large.Meanwhile, above-mentioned buck-boost converter can only realize the power conversion of single input source to load, can not realize the power conversion between multiple input source and load simultaneously.On the other hand, in single input buck-boost converter, booster circuit breaker in middle tube current stress is large, is especially not suitable for low-voltage, high-current application scenario.
Summary of the invention
Goal of the invention:
The present invention is directed to the deficiencies in the prior art, a kind of parallel multi input coupling inductance buck-boost converter is provided.
Technical scheme:
The present invention adopts following technical scheme for achieving the above object:
This converter is by N number of booster circuit, 1 reduction voltage circuit (20) and load (R
o) composition, N be greater than 1 natural number, wherein:
Each booster circuit in described N number of booster circuit is all made up of input source, filter inductance, switching tube, diode, the positive pole of input source connects the 1. end of filter inductance, 2. the end drain electrode of connecting valve pipe and the anode of diode respectively of filter inductance, the source electrode of switching tube is connected with the negative pole of input source, the negative electrode of described diode forms the positive output end of booster circuit, and the negative pole of described input source forms the negative output terminal of booster circuit;
The output of described N number of booster circuit is connected in parallel with each other, and N number of booster circuit shares a filter capacitor (C
m), filter capacitor (C
m) two ends be connected with the positive and negative output of N number of booster circuit respectively.
Described reduction voltage circuit (20) is by the first switching tube (Q
o), the first diode (D
o), N number of filter inductance (L
o-1, L
o-2l
o-N) and the first filter capacitor (C
o) composition, K filter inductance (L in described N number of filter inductance
o-K) 1. end and (K+1) individual filter inductance (L
o-(K+1)) 2. end be connected, wherein K is the natural number being less than N, the first switching tube (Q
o) drain electrode be connected with the positive output end of N number of booster circuit, the first switching tube (Q
o) source electrode respectively with the first diode (D
o) negative electrode and the first filter inductance (L
o-1) 2. end be connected, N filter inductance (L
o-N) 1. end respectively with the first filter capacitor (C
o) one end and load (R
o) one end be connected, load (R
o) the other end respectively with the first filter capacitor (C
o) the other end, the first diode (D
o) anode and N number of boosting negative output terminal be connected;
In described N number of booster circuit, the filter inductance (L in J booster circuit
i-J) with reduction voltage circuit (20) in J filter inductance (L
o-J) be coupled by a magnetic core, J is the natural number being less than or equal to N, and filter inductance (L in J booster circuit
i-J) 1. end and reduction voltage circuit (20) in J filter inductance (L
o-J) 1. end be Same Name of Ends, filter inductance (L in J booster circuit
i-J) 2. end and reduction voltage circuit (20) in J filter inductance (L
o-J) 2. end be Same Name of Ends.
The present invention has following technique effect:
(1) the buck conversion between multiple input source and load voltage can be realized, be applicable to the application scenario of voltage wide range change;
(2) multiple input source shares reduction voltage circuit and forms load outputs, decreases the quantity of converter switches pipe, simplifies circuit structure;
(3) filter inductance in booster circuit and reduction voltage circuit shares inductance core, decreases the quantity of converter magnetic core used, and can be improved the dynamic property of converter by inductance coupling high;
(4) voltage of multiple input source and load voltage can independently control separately, control simple;
(5) input current continuity and pulsation is less, multiple input source can simultaneously or timesharing power to the load, considerably increase the control strategy of converter, make control variation.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit structure schematic diagram of converter of the present invention;
The circuit structure schematic diagram of converter of the present invention when accompanying drawing 2 is dual input;
The equivalent circuit theory figure of converter of the present invention each switch mode when accompanying drawing 3 ~ Fig. 9 is dual input;
1,2, the numbering of N-booster circuit symbol description in above accompanying drawing:; 20-reduction voltage circuit; V
in1~ V
inNinput direct-current source in-1 ~ N number of booster circuit; L
in-1~ L
in-1filter inductance in-1 ~ N number of booster circuit; Q
1~ Q
n-1 ~ N number of booster circuit breaker in middle pipe; D
1~ D
ndiode in-1 ~ N number of booster circuit; C
m-booster circuit filter capacitor; Q
ofirst switching tube in-reduction voltage circuit; D
ofirst diode in-reduction voltage circuit; L
o-1~ L
o-N1st ~ N number of filter inductance in-reduction voltage circuit; C
ofilter capacitor in-reduction voltage circuit; R
o-load; V
o-output voltage.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The buck that the present invention adopts the mode of booster circuit and reduction voltage circuit cascade to realize between input source and load voltage converts, and adapts to the needs of input source voltage wide range change with this; The mode of booster circuit parallel connection is adopted to realize power expansion, namely the input of each booster circuit can be the input source of one species, also can be different types of input source, the application requirement of electricity generation system to accommodate distributed, reduces single booster circuit breaker in middle tube current stress simultaneously; Each booster circuit independently controls, and that reduces each booster circuit realizes difficulty, and improves the whole efficiency of converter; By by mode coupled to each other for filter inductance in booster circuit and reduction voltage circuit, reduce the number of magnetic elements in converter, reduce volume, the weight of converter, the high frequency ripple that can also cancel each other out in inductance coupled to each other between filter inductance, improve the dynamic property of converter.
As shown in Figure 1, this converter is by N number of booster circuit, 1 reduction voltage circuit (20) and load (R
o) composition, N be greater than 1 natural number, wherein: each booster circuit in described N number of booster circuit is all made up of input source, filter inductance, switching tube, diode, the positive pole of input source connects the 1. end of filter inductance, 2. the end drain electrode of connecting valve pipe and the anode of diode respectively of filter inductance, the source electrode of switching tube is connected with the negative pole of input source, and the negative electrode of described diode forms the positive output end of booster circuit, and the negative pole of described input source forms the negative output terminal of booster circuit; The output of described N number of booster circuit is connected in parallel with each other, and N number of booster circuit shares a filter capacitor (C
m), filter capacitor (C
m) two ends be connected with the positive and negative output of N number of booster circuit respectively.Described reduction voltage circuit (20) is by the first switching tube (Q
o), the first diode (D
o), N number of filter inductance (L
o-1, L
o-2l
o-N) and the first filter capacitor (C
o) composition, K filter inductance (L in described N number of filter inductance
o-K) 1. end and (K+1) individual filter inductance (L
o-(K+1)) 2. end be connected, wherein K is the natural number being less than N, the first switching tube (Q
o) drain electrode be connected with the positive output end of N number of booster circuit, the first switching tube (Q
o) source electrode respectively with the first diode (D
o) negative electrode and the first filter inductance (L
o-1) 2. end be connected, N filter inductance (L
o-N) 1. end respectively with the first filter capacitor (C
o) one end and load (R
o) one end be connected, load (R
o) the other end respectively with the first filter capacitor (C
o) the other end, the first diode (D
o) anode and N number of boosting negative output terminal be connected; In described N number of booster circuit, the filter inductance (L in J booster circuit
i-J) with reduction voltage circuit (20) in J filter inductance (L
o-J) be coupled by a magnetic core, J is the natural number being less than or equal to N, and filter inductance (L in J booster circuit
i-J) 1. end and reduction voltage circuit (20) in J filter inductance (L
o-J) 1. end be Same Name of Ends, filter inductance (L in J booster circuit
i-J) 2. end and reduction voltage circuit (20) in J filter inductance (L
o-J) 2. end be Same Name of Ends.
Below for dual input, and the operation principle of 2 ~ accompanying drawing, 9 pairs of converters of the present invention is made a concrete analysis of by reference to the accompanying drawings.
When converter works: two booster circuits can work in boosting or non-boosting operating state, when booster circuit work and pressure-increasning state, switching tube in corresponding booster circuit is on off state, when booster circuit works in non-pressure-increasning state, the switching tube in corresponding booster circuit keeps off state; Reduction voltage circuit can work in step-down or non-step-down operating state, and when reduction voltage circuit works in step-down state, corresponding switching tube is on off state, and when reduction voltage circuit works in non-step-down state, corresponding switching tube is in conducting state always.
According to the operating state of booster circuit and reduction voltage circuit, converter has 8 kinds of operating states.
Operating state 1: booster circuit 1 works in pressure-increasning state, booster circuit 2 works in pressure-increasning state, and reduction voltage circuit works in step-down state, the switching tube Q now in accompanying drawing 2
1, Q
2and Q
oall work on off state.
Operating state 2: booster circuit 1 works in pressure-increasning state, booster circuit 2 works in pressure-increasning state, and reduction voltage circuit works in non-step-down state, the switching tube Q now in accompanying drawing 2
1, Q
2work on off state, switching tube Q
oconducting always, equivalent electric circuit as shown in Figure 3.
Operating state 3: booster circuit 1 works in pressure-increasning state, booster circuit 2 works in non-pressure-increasning state, and reduction voltage circuit works in step-down state, the switching tube Q now in accompanying drawing 2
1, Q
owork on off state, switching tube Q
2turn off, equivalent electric circuit as shown in Figure 4 always.
Operating state 4: booster circuit 1 works in pressure-increasning state, booster circuit 2 works in non-pressure-increasning state, and reduction voltage circuit works in non-step-down state, the switching tube Q now in accompanying drawing 2
1work on off state, switching tube Q
2turn off, switching tube Qo conducting always, equivalent electric circuit as shown in Figure 5 always.
Operating state 5: booster circuit 1 works in non-pressure-increasning state, booster circuit 2 works in pressure-increasning state, and reduction voltage circuit works in step-down state, the switching tube Q now in accompanying drawing 2
2and Q
owork on off state, switching tube Q
1turn off, equivalent electric circuit as shown in Figure 6 always.
Operating state 6: booster circuit 1 works in non-pressure-increasning state, booster circuit 2 works in pressure-increasning state, and reduction voltage circuit works in non-step-down state, the switching tube Q now in accompanying drawing 2
2work on off state, switching tube Q
1turn off, switching tube Qo conducting always, equivalent electric circuit as shown in Figure 7 always.
Operating state 7: booster circuit 1 works in non-pressure-increasning state, booster circuit 2 works in non-pressure-increasning state, and reduction voltage circuit works in step-down state, the switching tube Q now in accompanying drawing 2
owork on off state, switching tube Q
1, Q
2turn off, equivalent electric circuit as shown in Figure 8 always.
Operating state 8: booster circuit 1 works in non-pressure-increasning state, booster circuit 2 works in non-pressure-increasning state, and reduction voltage circuit works in non-step-down state, the switching tube Q now in accompanying drawing 2
1and Q
2turn off, switching tube Q always
oconducting always, equivalent electric circuit as shown in Figure 9.
From analyzing above, the input of converter and output can independently control separately, and the control strategy of converter can have multiple choices, and input source can be powered to the load by boosting inverter, can be powered to the load by decompression transformation, also can be powered to the load by buck conversion.
Claims (1)
1. a parallel multi input coupling inductance buck-boost converter, is characterized in that:
This converter is by N number of booster circuit, filter capacitor (C
m), 1 reduction voltage circuit (20) and load (R
o) composition, N be greater than 1 natural number, wherein:
Each booster circuit in described N number of booster circuit is all made up of input source, filter inductance, switching tube, diode, the positive pole of input source connects the 1. end of filter inductance, 2. the end drain electrode of connecting valve pipe and the anode of diode respectively of filter inductance, the source electrode of switching tube is connected with the negative pole of input source, the negative electrode of described diode forms the positive output end of booster circuit, and the negative pole of described input source forms the negative output terminal of booster circuit;
The output of described N number of booster circuit is connected in parallel with each other, and N number of booster circuit shares a filter capacitor (C
m), filter capacitor (C
m) two ends be connected with the positive and negative output of N number of booster circuit respectively;
Described reduction voltage circuit (20) is by the first switching tube (Q
o), the first diode (D
o), N number of filter inductance (L
o-1, L
o-2l
o-N) and the first filter capacitor (C
o) composition, K filter inductance (L in described N number of filter inductance
o-K) 1. end and (K+1) individual filter inductance (L
o-(K+1)) 2. end be connected, wherein K is the natural number being less than N, the first switching tube (Q
o) drain electrode be connected with the positive output end of N number of booster circuit, the first switching tube (Q
o) source electrode respectively with the first diode (D
o) negative electrode and the first filter inductance (L
o-1) 2. end be connected, N filter inductance (L
o-N) 1. end respectively with the first filter capacitor (C
o) one end and load (R
o) one end be connected, load (R
o) the other end respectively with the first filter capacitor (C
o) the other end, the first diode (D
o) anode and N number of booster circuit negative output terminal be connected;
In described N number of booster circuit, the filter inductance (L in J booster circuit
i-J) with reduction voltage circuit (20) in J filter inductance (L
o-J) be coupled by a magnetic core, J is the natural number being less than or equal to N, and filter inductance (L in J booster circuit
i-J) 1. end and reduction voltage circuit (20) in J filter inductance (L
o-J) 1. end be Same Name of Ends, filter inductance (L in J booster circuit
i-J) 2. end and reduction voltage circuit (20) in J filter inductance (L
o-J) 2. end be Same Name of Ends.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210063240.7A CN103312153B (en) | 2012-03-12 | 2012-03-12 | A kind of parallel multi input coupling inductance buck-boost converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210063240.7A CN103312153B (en) | 2012-03-12 | 2012-03-12 | A kind of parallel multi input coupling inductance buck-boost converter |
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| Publication Number | Publication Date |
|---|---|
| CN103312153A CN103312153A (en) | 2013-09-18 |
| CN103312153B true CN103312153B (en) | 2016-04-27 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155892B (en) * | 2014-07-11 | 2017-03-01 | 深圳市浩博高科技有限公司 | Circuit and method using the faint energy collection technology of single-chip I/O mouth |
| CN104218793A (en) * | 2014-09-26 | 2014-12-17 | 天津世冠自动化科技有限公司 | Novel multi-source input double-way direct current/direct current (DC/DC) converter |
| CN105785295B (en) * | 2016-04-19 | 2019-05-03 | 鑫高益医疗设备股份有限公司 | A kind of gradient power amplifier based on multistage coupling inductance optimization design |
| CN105939110A (en) * | 2016-05-26 | 2016-09-14 | 吉林大学 | DC chopper device with multi-path input processing ability |
| CN109713901A (en) * | 2019-01-10 | 2019-05-03 | 江苏工程职业技术学院 | A kind of end Boost coupling inductance formula buck translation circuit and control method |
| CN117674584A (en) * | 2022-09-01 | 2024-03-08 | 中兴通讯股份有限公司 | Power factor correction converter and switching power supply |
| CN117595649A (en) * | 2023-11-27 | 2024-02-23 | 深圳市迪威电气有限公司 | Multiport input non-isolated direct current converter and control method thereof |
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|---|---|---|---|---|
| CN101626212A (en) * | 2009-07-31 | 2010-01-13 | 东南大学 | Auxiliary power supply device of hybrid-power electric vehicle based on waste heat and photovoltaic generation |
| CN102064705A (en) * | 2011-01-19 | 2011-05-18 | 南京航空航天大学 | Current-source-type multi-input full-bridge converter with single primary winding |
| CN102290985A (en) * | 2011-08-12 | 2011-12-21 | 南京航空航天大学 | Coupling inductor based voltage boosting and reducing direct current (DC) converter |
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|---|---|---|---|---|
| US7375985B2 (en) * | 2006-03-17 | 2008-05-20 | Yuan Ze University | High efficiency single stage bidirectional converter |
| CN101976953B (en) * | 2010-09-17 | 2012-08-15 | 浙江大学 | Isolated bidirectional DC-DC converter realized by coupling inductor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626212A (en) * | 2009-07-31 | 2010-01-13 | 东南大学 | Auxiliary power supply device of hybrid-power electric vehicle based on waste heat and photovoltaic generation |
| CN102064705A (en) * | 2011-01-19 | 2011-05-18 | 南京航空航天大学 | Current-source-type multi-input full-bridge converter with single primary winding |
| CN102290985A (en) * | 2011-08-12 | 2011-12-21 | 南京航空航天大学 | Coupling inductor based voltage boosting and reducing direct current (DC) converter |
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Inventor after: Zhang Junjun Inventor after: Wu Hongfei Inventor after: Xing Yan Inventor after: Wang Jingjing Inventor before: Zhang Junjun Inventor before: Wu Hongfei Inventor before: Xing Yan |
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