CN207150428U - 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
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- CN207150428U CN207150428U CN201721213094.6U CN201721213094U CN207150428U CN 207150428 U CN207150428 U CN 207150428U CN 201721213094 U CN201721213094 U CN 201721213094U CN 207150428 U CN207150428 U CN 207150428U
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Abstract
A kind of two-way DC/DC converters of low conduction loss are the utility model is related to, 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.It is of the present utility model to have the prominent advantages that：Compared to original two-way Buck Boosts structure, the utility model all 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 utility model belongs to electric and electronic technical field, 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.
Utility model content
In view of this, the purpose of this utility model is the two-way DC/DC converters for providing a kind of low conduction loss, enters one
Walk the efficiency of Lifting Transform device.
To reach above-mentioned purpose, the utility model 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 utility model are：
(1) the utility model compares original two-way One Buck-Boost converter body structure, all subtracts under various mode of operations
Lack the conduction loss of an electronic power switch or diode, the conduction loss of converter is reduced about half, efficiency is big
Width improves.
(2) the utility model is simple in construction, easily controllable, has obvious practical value.
Brief description of the drawings
In order that the purpose of this utility model, technical scheme and beneficial effect are clearer, the utility model provides as follows
Accompanying drawing illustrates：
Fig. 1 is the topology diagram of DC/DC converters in the utility model embodiment；
Fig. 2 is the switching tube and relay when DC/DC converters are operated in positive decompression mode in the utility model embodiment
Device state diagram；
Fig. 3 is the switching tube and relay when DC/DC converters are operated in positive boost mode in the utility model embodiment
Device state diagram；
Fig. 4 is the switching tube and relay when DC/DC converters are operated in reverse decompression mode in the utility model embodiment
Device state diagram；
Fig. 5 is the switching tube and relay when DC/DC converters are operated in reverse boost mode in the utility model embodiment
Device state diagram.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below in conjunction with specific
The utility model is described in detail embodiment.It should be evident that following examples will be helpful to those skilled in the art
The utility model is further understood, but it is not formed to limitation of the present utility model, it will be apparent to those skilled in the art that can
To create similar accompanying drawing under general plotting of the present utility model.These belong to the scope of protection of the utility model.
As shown in figure 1, converter described in the utility model includes：Two IGBT half-bridges, an inductor, two electric capacity
Device, two relays.Wherein：Each relay is in parallel with the upper bridge arm of a half-bridge；Capacitor is connected to two and half
The DC terminal of bridge；Two IGBT half-bridges and an inductor form a two-way One Buck-Boost converter body, i.e. inductor connects
Between the midpoint of two half-bridge modules.
DC/DC converters described in the utility model have two ports, including four kinds of mode of operations, are respectively：Forward direction drop
Die pressing type, positive boost mode, reverse decompression mode, reverse boost mode.As can be seen that the converter has bidirectional power flow
It is dynamic, 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 present utility model make original to need to flow through T3Anti-paralleled diode load current by not having substantially
The relay J of conduction 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 present utility model make original to need to flow through T1IGBT load current damaged by being not turned on substantially
The relay J of consumption1Flow 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 present utility model make original to need to flow through T1Anti-paralleled diode load current by not having substantially
The relay J of conduction 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 present utility model make original to need to flow through T3IGBT load current damaged by being not turned on substantially
The relay J of consumption2Flow through, reduce the loss of a switching tube.
Finally illustrate, preferred embodiment above is only unrestricted to illustrate the technical solution of the utility model, to the greatest extent
The utility model has been described in detail by above preferred embodiment for pipe, but those skilled in the art should manage
Solution, can make various changes, without departing from the utility model claims book institute to it in the form and details
The scope of restriction.
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 operation in freewheeling state, when bridge arm electronic power switch disconnects instantly, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721213094.6U CN207150428U (en) | 2017-09-20 | 2017-09-20 | A kind of two-way DC/DC converters of low conduction loss |
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| CN201721213094.6U CN207150428U (en) | 2017-09-20 | 2017-09-20 | A kind of two-way DC/DC converters of low conduction loss |
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| CN207150428U true CN207150428U (en) | 2018-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465343A (en) * | 2017-09-20 | 2017-12-12 | 重庆聚陆新能源有限公司 | A kind of two-way DC/DC converters of low conduction loss |
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2017
- 2017-09-20 CN CN201721213094.6U patent/CN207150428U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465343A (en) * | 2017-09-20 | 2017-12-12 | 重庆聚陆新能源有限公司 | A kind of two-way DC/DC converters of low conduction loss |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180327 Termination date: 20210920 |
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| CF01 | Termination of patent right due to non-payment of annual fee |