CN103312154A - Series type multi input coupled inductor buck and boost converter - Google Patents
Series type multi input coupled inductor buck and boost converter Download PDFInfo
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- CN103312154A CN103312154A CN2012100632619A CN201210063261A CN103312154A CN 103312154 A CN103312154 A CN 103312154A CN 2012100632619 A CN2012100632619 A CN 2012100632619A CN 201210063261 A CN201210063261 A CN 201210063261A CN 103312154 A CN103312154 A CN 103312154A
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- booster circuit
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Abstract
The invention discloses a series type multi input coupled inductor buck and boost converter which belongs to the technical field of power electronic converters. The converter is composed of N boost circuits, a buck circuit (20) and a load, wherein N is a natural number more than one. Each boost circuit is composed of an input source, a filtering inductor, a switch tube, a diode and a filtering capacitor. The buck circuit is composed of a switch tube, a diode, a filtering inductor and a filtering capacitor. The output ends of N boost circuits are connected in series and then are connected with the input end of the buck circuit (20). The output end of the buck circuit (20) is connected with the load. The filtering inductors of N boost circuits are respectively coupled with the filtering inductor of the buck circuit. According to the converter provided by the invention, a number of input sources power the load at the same time; buck and boost conversion between input and output is realized; the filtering inductors are coupled with each other; the converter has the advantage of small size; different input sources and the load side can be respectively and independently controlled; and the control is simple.
Description
Technical field
The present invention relates to a kind of tandem and input the coupling inductance buck-boost converter more, belong to the converters technical field.
Background technology
Energy crisis and problem of environmental pollution are day by day serious, and the development and utilization of novel energy is subject to the attention of countries in the world.The output voltage of the generation of electricity by new energy equipment such as heat energy thermoelectric cell, photovoltaic cell, fuel cell with the variation of environmental condition in the wide range inner conversion, and the energy storage devices such as storage battery, super capacitor are along with the difference of charging and discharging state, its terminal voltage is also in very wide scope inner conversion, and the output voltage of single generation of electricity by new energy equipment is very low, therefore needs to adapt to wide-voltage range and realizes simultaneously high DC converter of boosting.On the other hand, solar energy, wind energy, etc. novel energy larger with its power output of environmental evolution, change in voltage, supply of electric power is unstable, discontinuous, and fuel cell output voltage changes with the variation of load, therefore, in order to ensure continuously reliable powering load, multiple new forms of energy need to be bonded to each other, consist of the associating electric power system of having complementary advantages.
In buck-boost converter, the buck-boost converter that is made of Buck converter and the cascade of Boost converter has obtained more research and application owing to plurality of advantages.Document " Ren Xiaoyong; 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 that is made of Buck converter and the cascade of Boost converter studied only comprises an inductance, and topological structure is simple, but the input and output side discontinuous current is not suitable for heat energy thermo-electric generation, fuel cell etc. to the application scenario of ripple sensitivity; Document " Rae-Young Kim and Jih-Sheng Lai.A seamless mode transfer maximum power point tracking controller for thermoelectric generator applications[J] .IEEE Transactions on power electronics; 2008; 24 (5): 2310-2318. " the buck-boost converter input and output current continuity studied, but comprise two independently inductance, converter volume weight is large.Simultaneously, above-mentioned buck-boost converter can only realize that single input source arrives the power conversion of load, can not realize the power conversion between a plurality of input sources and the load simultaneously.On the other hand, adopt traditional Boost converter in the buck-boost converter, its step-up ratio is subject to the restriction of switching tube maximum duty cycle in the converter, voltage and current stress, is not suitable for being used in the occasion that requires high step-up ratio.And in the occasion that requires height to boost, usually realize boosting by transformer, transformer configuration complexity and conversion efficiency are low.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide a kind of tandem to input the coupling inductance buck-boost converter more.
This converter is by N booster circuit, 1 reduction voltage circuit (20) and load (R
o) form, N is the natural number greater than 1, wherein:
Each booster circuit in the described N booster circuit all is comprised of input source, filter inductance, switching tube, diode and electric capacity, the positive pole of input source connects the 1. end of filter inductance, 2. the end of filter inductance connects the anode of diode and the drain electrode of switching tube, the negative electrode of diode connects an end of filter capacitor, the source electrode of the other end connecting valve pipe of filter capacitor and the negative pole of input source, the end that the negative electrode of described diode links to each other with filter capacitor consists of the positive output end of booster circuit, and the negative pole of described input source consists of the negative output terminal of booster circuit;
The output of a described N booster circuit is connected in series each other successively;
Described reduction voltage circuit (20) is by the first switching tube (Q
o), the first diode (D
o), a N filter inductance (L
O-1, L
O-2L
O-N) and the first filter capacitor (C
o) form K filter inductance (L in the described N filter inductance
O-K) 1. end and (K+1) individual filter inductance (L
O-(K+1)) 2. end link to each other, wherein K is the natural number less than N, the first switching tube (Q
o) drain electrode link to each other the first switching tube (Q with the positive output end of the 1st booster circuit
o) source electrode and the first diode (D
o) negative electrode and the first filter inductance (L
O-1) 2. end link to each other N filter inductance (L
O-N) 1. end respectively with the first filter capacitor (C
o) an end and load (R
o) an end link to each other load (R
o) the other end respectively with the first filter capacitor (C
o) the other end, the first diode (D
o) anode and the negative output terminal of N booster circuit link to each other;
In the described N 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 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 the 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) can realize buck conversion between a plurality of input sources and the load voltage, be applicable to the application scenario that voltage wide range changes;
(2) a plurality of input sources share reduction voltage circuit and form the load output, have reduced the quantity of converter switches pipe, have simplified circuit structure;
(3) filter inductance in booster circuit and the reduction voltage circuit shares inductance core, has reduced the quantity of the used magnetic core of converter, and can improve by inductance coupling high the dynamic property of converter;
(4) voltage of a plurality of input sources and load voltage can independently be controlled separately, and control is simple.
Description of drawings
The circuit structure schematic diagram of converter of the present invention when accompanying drawing 2 is dual input.
Accompanying drawing 3～accompanying drawing 9 is the equivalent circuit theory figure of each switch mode of converter of the present invention.
1,2, N is the numbering of booster circuit designation in the above accompanying drawing:; 20 is reduction voltage circuit; V
In1, V
In2, V
InNBe respectively the 1st, 2, the input source of a N booster circuit; L
I-1, L
I-2, L
I-NBe respectively the 1st, 2, the filter inductance of a N booster circuit; Q
1, Q
2, Q
NBe respectively the 1st, 2, the switching tube of a N booster circuit; D
1, D
2, D
NBe respectively the 1st, 2, the diode of a N booster circuit; C
1, C
2, C
NBe respectively the 1st, 2, the filter capacitor of a N booster circuit; Q
oThe first switching tube for reduction voltage circuit; D
oThe first diode for reduction voltage circuit; L
O-1, L
O-2, L
O-NFilter inductance for reduction voltage circuit; C
oFilter capacitor for reduction voltage circuit; R
oBe load; V
oBe output voltage.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
The present invention adopts the mode of booster circuit and reduction voltage circuit cascade to realize buck conversion between input source and the load voltage, adapts to the needs that the input source voltage wide range changes with this; Adopt the mode of booster circuit series connection to realize high boosting, be that each booster circuit only needs lower step-up ratio just can realize the step-up ratio that whole converter is higher, reduce the realization difficulty of each booster circuit, reduce the stress of device, and improve the efficient of converter; By with filter inductance mode coupled to each other in booster circuit and the reduction voltage circuit, reduce the number of magnetic elements in the converter, reduce volume, the weight of converter, the high frequency ripple between the filter inductance in the inductance that can also cancel each other out coupled to each other, the dynamic property of raising converter.
As shown in Figure 1, this converter is by N booster circuit, 1 reduction voltage circuit (20) and load (R
o) form, N is the natural number greater than 1, wherein: each booster circuit in the described N booster circuit all is by input source, filter inductance, switching tube, diode and electric capacity form, the positive pole of input source connects the 1. end of filter inductance, 2. the end of filter inductance connects the anode of diode and the drain electrode of switching tube, the negative electrode of diode connects an end of filter capacitor, the source electrode of the other end connecting valve pipe of filter capacitor and the negative pole of input source, the end that the negative electrode of described diode links to each other with filter capacitor consists of the positive output end of booster circuit, and the negative pole of described input source consists of the negative output terminal of booster circuit; The output of a described N booster circuit is connected in series each other successively; Described reduction voltage circuit (20) is by the first switching tube (Q
o), the first diode (D
o), a N filter inductance (L
O-1, L
O-2L
O-N) and the first filter capacitor (C
o) form K filter inductance (L in the described N filter inductance
O-K) 1. end and (K+1) individual filter inductance (L
O-(K+1)) 2. end link to each other, wherein K is the natural number less than N, the first switching tube (Q
o) drain electrode link to each other the first switching tube (Q with the positive output end of the 1st booster circuit
o) source electrode and the first diode (D
o) negative electrode and the first filter inductance (L
O-1) 2. end link to each other N filter inductance (L
O-N) 1. end respectively with the first filter capacitor (C
o) an end and load (R
o) an end link to each other load (R
o) the other end respectively with the first filter capacitor (C
o) the other end, the first diode (D
o) anode and the negative output terminal of N booster circuit link to each other; In the described N 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 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 the 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 below is take dual input as example, and the operation principle of 9 pairs of converters of the present invention of 2～accompanying drawing is made a concrete analysis of by reference to the accompanying drawings.
When converter was worked: two booster circuits can work in and boost or the non-operating state of boosting, when booster circuit work and pressure-increasning state, switching tube in the corresponding booster circuit is on off state, when booster circuit worked in non-pressure-increasning state, the switching tube in the corresponding booster circuit kept off state; Reduction voltage circuit can work in step-down or non-step-down operating state, and when reduction voltage circuit worked in the step-down state, corresponding switching tube was on off state, and when reduction voltage circuit worked in non-step-down state, corresponding switching tube was in always conducting state.
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, and booster circuit 2 works in pressure-increasning state, and reduction voltage circuit works in the step-down state, at this moment the switching tube Q in the accompanying drawing 2
1, Q
2And Q
oAll work on off state.
Operating state 2: booster circuit 1 works in pressure-increasning state, and booster circuit 2 works in pressure-increasning state, and reduction voltage circuit works in non-step-down state, at this moment the switching tube Q in the accompanying drawing 2
1, Q
2Work on off state, switching tube Q
oAlways conducting, equivalent electric circuit are as shown in Figure 3.
Operating state 3: booster circuit 1 works in pressure-increasning state, and booster circuit 2 works in non-pressure-increasning state, and reduction voltage circuit works in the step-down state, at this moment the switching tube Q in the 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, and booster circuit 2 works in non-pressure-increasning state, and reduction voltage circuit works in non-step-down state, at this moment the switching tube Q in the accompanying drawing 2
1Work on off state, switching tube Q
2Turn-off switching tube Q always
oAlways conducting, equivalent electric circuit are as shown in Figure 5.
Operating state 5: booster circuit 1 works in non-pressure-increasning state, and booster circuit 2 works in pressure-increasning state, and reduction voltage circuit works in the step-down state, at this moment the switching tube Q in the 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, and booster circuit 2 works in pressure-increasning state, and reduction voltage circuit works in non-step-down state, at this moment the switching tube Q in the accompanying drawing 2
2Work on off state, switching tube Q
1Turn-off switching tube Q always
oAlways conducting, equivalent electric circuit are as shown in Figure 7.
Operating state 7: booster circuit 1 works in non-pressure-increasning state, and booster circuit 2 works in non-pressure-increasning state, and reduction voltage circuit works in the step-down state, at this moment the switching tube Q in the 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, and booster circuit 2 works in non-pressure-increasning state, and reduction voltage circuit works in non-step-down state, at this moment the switching tube Q in the accompanying drawing 2
1And Q
2Turn-off switching tube Q always
oAlways conducting, equivalent electric circuit are as shown in Figure 9.
By above analysis as can be known, the input of converter and output can independently be controlled separately, and the control strategy of converter can have multiple choices, and input source can power to the load by boosting inverter, can power to the load by decompression transformation, also can power to the load by the buck conversion.
Claims (1)
1. a tandem is inputted the coupling inductance buck-boost converter more, it is characterized in that: this converter is by N booster circuit, 1 reduction voltage circuit (20) and load (R
o) form, N is the natural number greater than 1, wherein:
Each booster circuit in the described N booster circuit all is comprised of input source, filter inductance, switching tube, diode and electric capacity, the positive pole of input source connects the 1. end of filter inductance, 2. the end of filter inductance connects the anode of diode and the drain electrode of switching tube, the negative electrode of diode connects an end of filter capacitor, the source electrode of the other end connecting valve pipe of filter capacitor and the negative pole of input source, the end that the negative electrode of described diode links to each other with filter capacitor consists of the positive output end of booster circuit, and the negative pole of described input source consists of the negative output terminal of booster circuit;
The output of a described N booster circuit is connected in series each other successively;
Described reduction voltage circuit (20) is by the first switching tube (Q
o), the first diode (D
o), a N filter inductance (L
O-1, L
O-2L
O-N) and the first filter capacitor (C
o) form K filter inductance (L in the described N filter inductance
O-K) 1. end and (K+1) individual filter inductance (L
O-(K+1)) 2. end link to each other, wherein K is the natural number less than N, the first switching tube (Q
o) drain electrode link to each other the first switching tube (Q with the positive output end of the 1st booster circuit
o) source electrode and the first diode (D
o) negative electrode and the first filter inductance (L
O-1) 2. end link to each other N filter inductance (L
O-N) 1. end respectively with the first filter capacitor (C
o)～end and load (R
o) an end link to each other load (R
o) the other end respectively with the first filter capacitor (C
o) the other end, the first diode (D
o) anode and the negative output terminal of N booster circuit link to each other;
In the described N 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 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 the 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210063261.9A CN103312154B (en) | 2012-03-12 | 2012-03-12 | A kind of tandem multi input coupling inductance buck-boost converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210063261.9A CN103312154B (en) | 2012-03-12 | 2012-03-12 | A kind of tandem multi input coupling inductance buck-boost converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103312154A true CN103312154A (en) | 2013-09-18 |
| CN103312154B CN103312154B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210063261.9A Expired - Fee Related CN103312154B (en) | 2012-03-12 | 2012-03-12 | A kind of tandem multi input coupling inductance buck-boost converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245101A (en) * | 2015-10-30 | 2016-01-13 | 高海凌 | High-efficiency photovoltaic power optimizer serial topology circuit and control method thereof |
| CN105785295A (en) * | 2016-04-19 | 2016-07-20 | 鑫高益医疗设备股份有限公司 | Gradient power amplifier based on multistage coupling inductor optimized design |
| WO2018192495A1 (en) * | 2017-04-17 | 2018-10-25 | Huawei Technologies Co., Ltd. | Multiple buck stage single boost stage optimizer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6798177B1 (en) * | 2002-10-15 | 2004-09-28 | Arques Technology, Inc. | Boost-buck cascade converter for pulsating loads |
-
2012
- 2012-03-12 CN CN201210063261.9A patent/CN103312154B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6798177B1 (en) * | 2002-10-15 | 2004-09-28 | Arques Technology, Inc. | Boost-buck cascade converter for pulsating loads |
Non-Patent Citations (4)
| Title |
|---|
| GEOFFREY R.WALKER ET AL.: "Cascaded DC–DC Converter Connection of Photovoltaic Modules", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》, vol. 19, no. 4, 31 July 2004 (2004-07-31), pages 1130 - 1139 * |
| JINGQUAN CHEN ET AL.: "Buck-Boost PWM Converters Having Two Independently Controlled Switches", 《POWER ELECTRONICS SPECIALISTS CONFERENCE, 2001》, 21 June 2001 (2001-06-21), pages 736 - 741, XP010559317, DOI: 10.1109/PESC.2001.954206 * |
| 吴红飞等: "基于双输入/双输出变换器的三端口变换器拓扑", 《中国电机工程学报》, vol. 31, no. 27, 25 September 2011 (2011-09-25), pages 45 - 51 * |
| 陈乾宏等: "开关电源中磁集成技术及其应用", 《电工技术学报》, vol. 19, no. 3, 31 March 2004 (2004-03-31), pages 1 - 8 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245101A (en) * | 2015-10-30 | 2016-01-13 | 高海凌 | High-efficiency photovoltaic power optimizer serial topology circuit and control method thereof |
| CN105785295A (en) * | 2016-04-19 | 2016-07-20 | 鑫高益医疗设备股份有限公司 | Gradient power amplifier based on multistage coupling inductor optimized design |
| 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 |
| WO2018192495A1 (en) * | 2017-04-17 | 2018-10-25 | Huawei Technologies Co., Ltd. | Multiple buck stage single boost stage optimizer |
| US10333314B2 (en) | 2017-04-17 | 2019-06-25 | Futurewei Technologies, Inc. | Multiple buck stage single boost stage optimizer |
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| CN103312154B (en) | 2016-03-30 |
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