CN107465343A - A kind of two-way DC/DC converters of low conduction loss - Google Patents
A kind of two-way DC/DC converters of low conduction loss Download PDFInfo
- Publication number
- CN107465343A CN107465343A CN201710853456.6A CN201710853456A CN107465343A CN 107465343 A CN107465343 A CN 107465343A CN 201710853456 A CN201710853456 A CN 201710853456A CN 107465343 A CN107465343 A CN 107465343A
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- Prior art keywords
- electronic power
- bridge
- low
- power switch
- converters
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- 239000003990 capacitor Substances 0.000 claims abstract description 8
- 230000006837 decompression Effects 0.000 claims description 10
- 238000010276 construction Methods 0.000 abstract description 3
- 230000001939 inductive effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001172 regenerating 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to a kind of two-way DC/DC converters of low conduction loss, belong to electric and electronic technical field.The converter includes：The half-bridge of two electronic power switches, an inductor, two capacitors, two low-ohmic switches.Wherein, the half-bridge of electronic power switch, inductor and capacitor bank are in parallel with the upper bridge arm of the half-bridge of each electronic power switch into a two-way Buck Boost, low-ohmic switches.The present invention's has the prominent advantages that：Compared to original two-way Buck Boosts structure, the present invention reduces the loss of an electronic power switch or diode under various mode of operations, conduction loss is reduced into about half, efficiency high, it is simple in construction, it is easily controllable, there is obvious practical value.
Description
Technical field
The invention belongs to electric and electronic technical field, it is related to a kind of two-way DC/DC converters of low conduction loss.
Background technology
In recent years, Development of Power Electronic Technology is swift and violent, has driven the development of multiple industries, especially renewable energy power generation
And new-energy automobile.Currently, the development of renewable energy power generation has had come to the node of key, photovoltaic power generating equipment in 2016
Construction cost already below traditional fossil energy power generating equipment.In addition, the motor-drive technique of new-energy automobile there has also been it is huge
Much progress, the newest P100D electric automobiles of tesla, hundred kilometers of acceleration have reached 2.5s, can the luxurious super race of ten million yuan of level shoulder to shoulder.
Correspondingly, micro-capacitance sensor becomes the hot topic of research in recent years.Due to the distributed nature of regenerative resource,
A kind of efficient mode is needed to be integrated, micro-capacitance sensor is undoubtedly best selection, especially direct-current micro-grid.Most new energy
The output voltage type that source generates electricity is all direct current, and the type of DC load now is more and more, the introducing nothing of direct-current micro-grid
Unnecessary AC/DC converting units, the efficiency of lifting system can be reduced by doubting.In addition, direct-current micro-grid can also integrate electric automobile
Electrically-charging equipment, the direct current charge that is particularly suitable for use in equipment.
DC/DC converters are the key interface equipment in direct-current grid, determine between various DC equipments and its with
Can efficiently it be interconnected between common DC bus.The technology of DC/DC converters is various at present, and any DC/DC power conversions
Primary demand is an electronic power switch and a fly-wheel diode, and wherein electronic power switch is by pulsewidth modulation, by one
Fixed time accounting is opened and turned off, and fly-wheel diode then undertakes the load current afterflow of electronic power switch turn-off time.
Flexibly switch between multi-mode to realize, in the topological structure for the DC/DC power conversions having, such as two-way Buck-Boost is converted
Device, although the purpose of two-way flow for realizing energy is pressed with Bidirectional up-down, has reached maximum flexibility, its topological structure
Also become complicated, electronic power switch and fly-wheel diode in its control model be present and current-carrying is turned on 100% time accounting,
Open shut-off without high-frequency, then just bring because of the larger conduction loss of power electronic devices and caused by additionally damage
Consumption, reduces efficiency.
The content of the invention
In view of this, it is an object of the invention to provide a kind of two-way DC/DC converters of low conduction loss, further carry
Rise the efficiency of converter.
To reach above-mentioned purpose, the present invention provides following technical scheme：
A kind of two-way DC/DC converters of low conduction loss, including the half-bridge of two electronic power switches, an inductance
Device, two capacitors and two low-ohmic switches；
Wherein：
Described two low-ohmic switches are respectively in parallel with a upper bridge arm in the half-bridge of described two electronic power switches；
Described two capacitors are connected to the DC terminal of the half-bridge of two electronic power switches；
The half-bridge of described two electronic power switches and one inductor form a two-way Buck-Boost conversion
Device, i.e., between the midpoint for the half-bridge that described inductor is connected to described two electronic power switches.
Further, the DC/DC converters have two ports, to and fro flow of power, from any one port to another
Realize the function of boosting and decompression in individual port.
Further, the low-ohmic switches are single-pole single-throw(SPST type, have closed and disconnected two states.
Further, when the DC/DC converters are operated in decompression mode, output end and the half of the electronic power switch
The upper bridge arm of bridge low-ohmic switches closure in parallel, another low-ohmic switches disconnect；The half-bridge of electronic power switch described in input
The electronic power switch of upper bridge arm be operated on off state, the diode operation of lower bridge arm is in freewheeling state, in upper bridge arm
When electronic power switch disconnects, the diode flows through load current, the upper and lower bridge arm electronic power switch of half-bridge described in output end
Remain open.
Further, when the DC/DC converters are operated in boost mode, input and the half of the electronic power switch
The upper bridge arm of bridge low-ohmic switches closure in parallel, another low-ohmic switches disconnect；The half-bridge of electronic power switch described in input
Upper and lower bridge arm electronic power switch remain open, the lower bridge arm power electronics of the half-bridge of electronic power switch described in output end is opened
Pass is operated on off state, and the diode of upper bridge arm is operated in freewheeling state, and when bridge arm electronic power switch disconnects instantly, this two
Pole pipe flows through load current.
Further, the low-ohmic switches are the switch of mechanical contact-type switch or low conduction loss.
The beneficial effects of the present invention are：
(1) present invention compares original two-way One Buck-Boost converter body structure, all reduces under various mode of operations
The conduction loss of one electronic power switch or diode, the conduction loss of converter is reduced about half, efficiency significantly carries
It is high.
(2) present invention is simple in construction, easily controllable, has obvious practical value.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carried out
Explanation：
Fig. 1 is the topology diagram of DC/DC converters in the embodiment of the present invention；
Fig. 2 is operated in switching tube and relay shape during positive decompression mode for DC/DC converters in the embodiment of the present invention
State figure；
Fig. 3 is operated in switching tube and relay shape during positive boost mode for DC/DC converters in the embodiment of the present invention
State figure；
Fig. 4 is operated in switching tube and relay shape during reverse decompression mode for DC/DC converters in the embodiment of the present invention
State figure；
Fig. 5 is operated in switching tube and relay shape during reverse boost mode for DC/DC converters in the embodiment of the present invention
State figure.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below in conjunction with specific implementation
The present invention is described in detail for example.Further managed it should be evident that following examples will be helpful to those skilled in the art
The solution present invention, but it is not construed as limiting the invention, it will be apparent to those skilled in the art that can be in the totality of the present invention
Similar accompanying drawing is createed under design.These belong to protection scope of the present invention.
As shown in figure 1, converter of the present invention includes：Two IGBT half-bridges, an inductor, two capacitors,
Two relays.Wherein：Each relay is in parallel with the upper bridge arm of a half-bridge；Capacitor is connected to two half-bridges
DC terminal；Two IGBT half-bridges and an inductor form a two-way One Buck-Boost converter body, i.e. inductor is connected to two
Between the midpoint of individual half-bridge module.
DC/DC converters of the present invention have two ports, including four kinds of mode of operations, are respectively：Forward direction decompression mould
Formula, positive boost mode, reverse decompression mode, reverse boost mode.As can be seen that the converter has bi-directional power flow,
The function of boosting and decompression can be achieved from input to output end or from output end to input.
When converter is operated in positive decompression mode, the state of all switching tubes and relay is as shown in Figure 2.Now,
Only relay J2Closure, other relays disconnect.Switch transistor T1IGBT be operated in switching mode, T2Anti-paralleled diode
Freewheeling mode is operated in, works as T1IGBT disconnect when, inductive current is by T2Anti-paralleled diode flow through.Switch transistor T3And T4Protect
Hold shut-off.In this operating mode, converter turns into a Buck converter.Compared to original two-way One Buck-Boost converter body
Structure, transformer configuration of the invention make original to need to flow through T3Anti-paralleled diode load current by being not turned on substantially
The relay J of loss3Flow through, reduce the loss of a diode.
When converter is operated in positive boost mode, the state of all switching tubes and relay is as shown in Figure 3.Now,
Only relay J1Closure, other relays disconnect.Switch transistor T4IGBT be operated in switching mode, T3Anti-paralleled diode
Freewheeling mode is operated in, works as T4IGBT disconnect when, inductive current is by T3Anti-paralleled diode flow through.Switch transistor T1And T2Protect
Hold shut-off.In this operating mode, converter turns into a Boost.Converted compared to original two-way Buck-Boost
Device structure, transformer configuration of the invention make original to need to flow through T1IGBT load current by be not turned on substantially loss
Relay J1Flow through, reduce the loss of an electronic power switch.
When converter is operated in reverse decompression mode, the state of all switching tubes and relay is as shown in Figure 4.Now,
Only relay J1Closure, other relays disconnect.Switch transistor T3IGBT be operated in switching mode, T4Anti-paralleled diode
Freewheeling mode is operated in, works as T3IGBT disconnect when, inductive current is by T4Anti-paralleled diode flow through.Switch transistor T1And T2Protect
Hold shut-off.In this operating mode, converter turns into a Buck converter.Compared to original two-way One Buck-Boost converter body
Structure, transformer configuration of the invention make original to need to flow through T1Anti-paralleled diode load current by being not turned on substantially
The relay J of loss1Flow through, reduce the loss of a diode.
When converter is operated in reverse boost mode, the state of all switching tubes and relay is as shown in Figure 5.Now,
Only relay J2Closure, other relays disconnect.Switch transistor T2IGBT be operated in switching mode, T1Anti-paralleled diode
Freewheeling mode is operated in, works as T2IGBT disconnect when, inductive current is by T1Anti-paralleled diode flow through.Switch transistor T3And T4Protect
Hold shut-off.In this operating mode, converter turns into a Boost.Converted compared to original two-way Buck-Boost
Device structure, transformer configuration of the invention make original to need to flow through T3IGBT load current by be not turned on substantially loss
Relay J2Flow through, reduce the loss of a switching tube.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (6)
- A kind of 1. two-way DC/DC converters of low conduction loss, it is characterised in that：Half-bridge including two electronic power switches, One inductor, two capacitors and two low-ohmic switches；Wherein：Described two low-ohmic switches are respectively in parallel with a upper bridge arm in the half-bridge of described two electronic power switches；Described two capacitors are connected to the DC terminal of the half-bridge of two electronic power switches；The half-bridge of described two electronic power switches and one inductor form a two-way One Buck-Boost converter body, i.e., The inductor is connected between the midpoint of the half-bridge of described two electronic power switches.
- A kind of 2. two-way DC/DC converters of low conduction loss according to claim 1, it is characterised in that：The DC/DC Converter has two ports, to and fro flow of power, realizes what is boosted and be depressured from any one port to another port Function.
- A kind of 3. two-way DC/DC converters of low conduction loss according to claim 1, it is characterised in that：The low-resistance Switch as single-pole single-throw(SPST type, there are closed and disconnected two states.
- A kind of 4. two-way DC/DC converters of low conduction loss according to claim 2, it is characterised in that：As the DC/ When DC converters are operated in decompression mode, the output end low-ohmic switches in parallel with the upper bridge arm of the half-bridge of the electronic power switch Closure, another low-ohmic switches disconnect；The electronic power switch work of the upper bridge arm of the half-bridge of electronic power switch described in input Make on off state, the diode operation of lower bridge arm is in freewheeling state, when the electronic power switch of upper bridge arm disconnects, two pole Pipe flows through load current, and the upper and lower bridge arm electronic power switch of half-bridge described in output end remains open.
- A kind of 5. two-way DC/DC converters of low conduction loss according to claim 2, it is characterised in that：As the DC/ When DC converters are operated in boost mode, the input low-ohmic switches in parallel with the upper bridge arm of the half-bridge of the electronic power switch Closure, another low-ohmic switches disconnect；The upper and lower bridge arm electronic power switch of the half-bridge of electronic power switch described in input is protected Disconnection is held, the lower bridge arm electronic power switch of the half-bridge of electronic power switch described in output end is operated on off state, upper bridge arm Diode be operated in freewheeling state, instantly bridge arm electronic power switch disconnect when, the diode flows through load current.
- A kind of 6. two-way DC/DC converters of low conduction loss according to claim 1 or 3 or 4 or 5, it is characterised in that： The low-ohmic switches are the switch of mechanical contact-type switch or low conduction loss.
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| Application Number | Priority Date | Filing Date | Title |
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| CN112511005A (en) * | 2021-02-03 | 2021-03-16 | 深圳市正浩创新科技有限公司 | Bidirectional DC/DC converter and energy storage system |
| CN114895207A (en) * | 2022-05-28 | 2022-08-12 | 上海交通大学 | On-line measuring method and system for AC impedance of lithium ion battery |
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Application publication date: 20171212 |