CN105846674A - Non-isolation and high-transformation-ratio bidirectional direct-current converter - Google Patents
Non-isolation and high-transformation-ratio bidirectional direct-current converter Download PDFInfo
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- CN105846674A CN105846674A CN201610460723.9A CN201610460723A CN105846674A CN 105846674 A CN105846674 A CN 105846674A CN 201610460723 A CN201610460723 A CN 201610460723A CN 105846674 A CN105846674 A CN 105846674A
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- inductance
- power switch
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- switch pipe
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention relates to a non-isolation and high-transformation-ratio bidirectional direct-current converter and aims at providing a bidirectional direct-current converter which is small in size, high in voltage transformation ratio and high in efficiency. The non-isolation and high-transformation-ratio bidirectional direct-current converter comprises a first direct-current power supply, a second direct-current power supply, a first inductor, a second inductor, a first power switching tube, a second power switching tube and a third power switching tube. A negative electrode of the first direct-current power supply is connected with a negative electrode end of the first power switching tube; a positive electrode end of the first power switching tube is connected with one end of the first inductor; the other end of the first inductor is connected with a positive electrode of the first direct-current power supply; the positive electrode of the first direct-current power supply is connected with the positive electrode end of the second power switching tube; the negative electrode end of the second power switching tube is connected with one end of the second inductor; the other end of the second inductor is connected with the negative electrode of the second direct-current power supply; the first power switching tube and the first inductor as well as the second power switching tube and the second inductor are connected through lead wires respectively; the other ends of the lead wires are connected into the second direct-current power supply.
Description
Technical field
The present invention relates to power electronics frequency conversion field, particularly relate to a kind of non-isolated high no-load voltage ratio two-way DC converter.
Background technology
Two-way DC converter carries out two-way energy transmission between two DC sources, is widely used in industrial circle at present,
As hybrid electric automobiles on energy management system, uninterrupted power source, fuel cell hybrid generation system, photovoltaic hybrid power system and
The aspects such as battery charger.
Present stage widely used two-way DC converter mainly includes that traditional two-way DC converter and isolation type bidirectional direct current become
Parallel operation.Traditional two-way DC converter simple in construction, is widely used, but there is also the following shortcoming: (1) is bigger when needs
No-load voltage ratio occasion time, operative duty cycles is very big, and therefore the time shared by energy transmission mode is few, causes efficiency to reduce；(2) required
Boost inductance is big, and inductance flows through whole input currents, and the current value of inductance is input current value, owing to operative duty cycles is big,
The inductive energy storage time is long, causes inductive current ripple big, and inductance volume and weight is big；(3) power switch flows through whole when turning on
Inductive current, i.e. flows through input current, and its on-state loss is big, and efficiency is low；(4) big due to output current ripple, need to select relatively
Big filter capacitor, adds volume and the cost of system.Isolation type bidirectional DC converter needs by adjusting isolating transformer
Turn ratio obtain higher boosting and antihypertensive effect, cause whole system work efficiency on the low side.
Summary of the invention
It is two-way that the technical problem to be solved in the present invention is to provide the non-isolated high no-load voltage ratio that a kind of volume is little, voltage change ratio is high, efficiency is high
DC converter.
Non-isolated high no-load voltage ratio two-way DC converter of the present invention, wherein, including the first DC source, the second DC source, first
Inductance, the second inductance, the first power switch pipe and the second power switch pipe, the negative pole of the first DC source and the first power switch
The negative pole end of pipe connects, one end connection of the positive terminal of the first power switch pipe and the first inductance, the other end of the first inductance and the
The positive pole of one DC source connects, and the positive pole of the first DC source and the positive terminal of the second power switch pipe connect, and the second power is opened
One end of the negative pole end and the second inductance that close pipe connects, and the other end of the second inductance and the negative pole of the second DC source connect, and first
Drawing the first wire between power switch pipe and the first inductance, the other end of the first wire and the negative pole end of the 3rd power switch pipe are even
Connecing, the positive pole of the positive terminal of the 3rd power switch pipe and the second DC source connects, the second power switch pipe and the second inductance it
Between draw the second wire, the negative pole of the other end of the second wire and the second DC source connects.
Non-isolated high no-load voltage ratio two-way DC converter of the present invention, wherein said first power switch pipe, the second power switch pipe and
Three power switch pipes are all made up of metal-oxide-semiconductor and power diode, and the negative electrode of power diode is connected with the drain electrode of metal-oxide-semiconductor, sun
Pole is connected with the source electrode of metal-oxide-semiconductor, and the negative electrode of power diode is the positive terminal of power switch pipe, and the anode of power diode is
The negative pole end of power switch pipe.
Non-isolated high no-load voltage ratio two-way DC converter of the present invention, wherein said first power switch pipe, the second power switch pipe and
Three power switch pipes are all made up of IGBT pipe and power diode, and the negative electrode of power diode is connected with IGBT pipe collector,
Anode is connected with IGBT pipe emitter stage, and the negative electrode of power diode is the positive terminal of power switch pipe, the anode of power diode
Negative pole end for power switch pipe.
Non-isolated high no-load voltage ratio two-way DC converter of the present invention, is parallel with between positive pole and the negative pole of wherein said first DC source
First electric capacity, is parallel with the second electric capacity between the positive pole and negative pole of the second DC source.
Non-isolated high no-load voltage ratio two-way DC converter of the present invention, wherein said first inductance and the second inductance are discrete inductance or coupling
Close inductance.
Non-isolated high no-load voltage ratio two-way DC converter difference from prior art of the present invention is: DC source two ends of the present invention are even
Being connected to the first brachium pontis and the second brachium pontis, the first brachium pontis is made up of the first power switch pipe and the first inductance, and the second brachium pontis is by the second merit
Rate switching tube and the second inductance composition, the first power switch pipe and the second power switch pipe compared with existing two-way DC converter
Dutycycle reduces, and can produce bigger voltage change ratio during voltage transformation.The most only flow on first inductance and the second inductance
Cross the current value less than DC source output of the current value on part input current, the first inductance and the second inductance, therefore, first
Inductance and the second inductance are less, and the current ripples of the first inductance and the second inductance is less, reduce the volume of the present invention.Due to stream
Crossing the current value on the first inductance and the second inductance less, electric current when making each power switch pipe turn on is smaller, and each power is opened
The on-state loss closing pipe is little, in hgher efficiency.Because the current ripples of the first inductance and the second inductance is less, less can be used
One electric capacity and the second electric capacity are filtered, and also further reduce the volume and weight of the present invention.
Below in conjunction with the accompanying drawings non-isolated high no-load voltage ratio two-way DC converter of the present invention is described further.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of non-isolated high no-load voltage ratio two-way DC converter of the present invention；
Fig. 2 is circuit structure diagram during non-isolated high no-load voltage ratio two-way DC converter boosting inverter pattern of the present invention；
Fig. 3 is circuit structure diagram during non-isolated high no-load voltage ratio two-way DC converter decompression transformation pattern of the present invention.
Detailed description of the invention
As it is shown in figure 1, be the circuit structure diagram of non-isolated high no-load voltage ratio two-way DC converter of the present invention, including the first DC source
V1, the second DC source V2, the first inductance L1, the second inductance L2, first power switch tube S the 1, second power switch pipe
S2 and the 3rd power switch tube S 3.The negative pole of the first DC source V1 and the negative pole end of the first power switch tube S 1 connect, the
The positive terminal of one power switch tube S 1 and one end of the first inductance L1 connect, the other end of the first inductance L1 and the first unidirectional current
The positive pole of source V1 connects, and the positive pole of the first DC source V1 and the positive terminal of the second power switch tube S 2 connect, the second power
One end of the negative pole end of switching tube S2 and the second inductance L2 connects, the other end of the second inductance L2 and the second DC source V2's
Negative pole connects, and is also parallel with the first electric capacity C1 between positive pole and the negative pole of the first DC source V1.At the first power switch pipe
Drawing the first wire between S1 and the first inductance L1, the other end of the first wire and the negative pole end of the 3rd power switch tube S 3 connect,
The positive terminal of the 3rd power switch tube S 3 and the positive pole of the second DC source S2 connect, in the second power switch tube S 2 and second
Drawing the second wire between inductance L2, the other end of the second wire and the negative pole of the second DC source S2 connect, at the second direct current
The second electric capacity C2 also it is parallel with between positive pole and the negative pole of power supply V2.
First power switch tube S 1, second power switch tube S 2 of the present invention and the 3rd power switch tube S 3 all by metal-oxide-semiconductor and
Power diode forms, or is made up of IGBT pipe and power diode.When using metal-oxide-semiconductor and power diode, power two
The negative electrode of pole pipe is connected with the drain electrode of metal-oxide-semiconductor, and anode is connected with the source electrode of metal-oxide-semiconductor, and the negative electrode of power diode is that power is opened
Closing the positive terminal of pipe, the anode of power diode is the negative pole end of power switch pipe.When using IGBT pipe and power diode,
The negative electrode of power diode is connected with IGBT pipe collector, and anode is connected with IGBT pipe emitter stage, the negative electrode of power diode
For the positive terminal of power switch pipe, the anode of power diode is the negative pole end of power switch pipe.
The first inductance L1 and the second inductance L2 employed in one embodiment of the present of invention are discrete inductance or coupling inductance.
The present invention is when carrying out boosting inverter, as in figure 2 it is shown, disconnect the second DC source V2, and at former second DC source
Load R is accessed in the position of V2, and the first power switch tube S 1 and the first inductance L1 forms the first brachium pontis, the second power switch pipe
S2 and the second inductance L2 forms the second brachium pontis, and the voltage of the first DC source V1 boosts through the first brachium pontis and the second brachium pontis
Conversion, by the voltage V that the voltage transformation of the first DC source V1 is the second electric capacity C2 two endsC2Add and be located at load R two ends, from
And complete boost process.In boost process, the first electric capacity C1 and the second electric capacity C2 plays filter action, the 3rd power switch pipe
S3 plays the effect of protection circuit by the characteristic of self conducting and cut-off.
The present invention is when carrying out decompression transformation, as it is shown on figure 3, disconnect the first DC source V1, and at former first DC source
Load R is accessed in the position of V1, and the first power switch tube S 1 and the first inductance L1 forms the first brachium pontis, the second power switch pipe
S2 and the second inductance L2 forms the second brachium pontis, and the voltage of the second DC source V2 boosts through the first brachium pontis and the second brachium pontis
Conversion, by the voltage V that the voltage transformation of the second DC source V2 is the first electric capacity C1 two endsC1Add and be located at load R two ends, from
And complete pressure reduction.In pressure reduction, the first electric capacity C1 and the second electric capacity C2 plays filter action, the 3rd power switch pipe
S3 plays the effect of protection circuit by the characteristic of self conducting and cut-off.
Non-isolated no-load voltage ratio two-way DC converter of the present invention, DC source two ends connect the first brachium pontis and the second brachium pontis, the first bridge
Arm is made up of the first power switch tube S 1 and the first inductance L1, and the second brachium pontis is by the second power switch tube S 2 and the second inductance L2
Composition, the dutycycle of the first power switch tube S 1 and the second power switch tube S 2 reduces compared with existing two-way DC converter,
Bigger voltage change ratio can be produced during voltage transformation.Part is flowed only through respectively on first inductance L1 and the second inductance L2
Current value on input current, the first inductance L1 and the second inductance L2 is less than the current value of DC source output, therefore, first
Inductance L1 and the second inductance L2 is less, and the current ripples of the first inductance L1 and the second inductance L2 is less, reduces the present invention's
Volume.Less owing to flowing through the current value on the first inductance L1 and the second inductance L2, when making each power switch pipe turn on electric current
Smaller, the on-state loss of each power switch pipe is little, in hgher efficiency.Because the first inductance L1 and the electric current of the second inductance L2
Ripple is less, the first less electric capacity C1 and the second electric capacity C2 can be used to be filtered, also further reduce the body of the present invention
Amass and weight.Volume of the present invention is little, voltage change ratio is high, efficiency is high, compared with prior art has clear advantage.
Embodiment described above is only to be described the preferred embodiment of the present invention, not carries out the scope of the present invention
Limiting, on the premise of designing spirit without departing from the present invention, technical scheme is made by those of ordinary skill in the art
Various deformation and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (5)
1. a non-isolated high no-load voltage ratio two-way DC converter, it is characterised in that: include the first DC source (V1), the second direct current
Power supply (V2), the first inductance (L1), the second inductance (L2), the first power switch pipe (S1), the second power switch pipe (S2) and the 3rd
Power switch pipe (S3), the negative pole of the first DC source (V1) and the negative pole end of the first power switch pipe (S1) connect, and the first power is opened
Close one end connection of positive terminal and first inductance (L1) of pipe (S1), the other end of the first inductance (L1) and the first DC source (V1)
Positive pole connects, and the positive pole of the first DC source (V1) and the positive terminal of the second power switch pipe (S2) connect, the second power switch pipe (S2)
Negative pole end and one end of the second inductance (L2) connect, the negative pole company of the other end of the second inductance (L2) and the second DC source (V2)
Connecing, draw the first wire between the first power switch pipe (S1) and the first inductance (L1), the other end and the 3rd power of the first wire are opened
The negative pole end closing pipe (S3) connects, the positive pole connection of the positive terminal of the 3rd power switch pipe (S3) and the second DC source (S2), the
The second wire is drawn, the other end of the second wire and the second DC source (S2) between two power switch pipes (S2) and the second inductance (L2)
Negative pole connect.
Non-isolated high no-load voltage ratio two-way DC converter the most according to claim 2, it is characterised in that: described first power is opened
Close pipe (S1), the second power switch pipe (S2) and the 3rd power switch pipe (S3) to be all made up of metal-oxide-semiconductor and power diode, power
The negative electrode of diode is connected with the drain electrode of metal-oxide-semiconductor, and anode is connected with the source electrode of metal-oxide-semiconductor, and the negative electrode of power diode is power
The positive terminal of switching tube, the anode of power diode is the negative pole end of power switch pipe.
Non-isolated high no-load voltage ratio two-way DC converter the most according to claim 2, it is characterised in that: described first power is opened
Close pipe (S1), the second power switch pipe (S2) and the 3rd power switch pipe (S3) to be all made up of IGBT pipe and power diode, power
The negative electrode of diode is connected with IGBT pipe collector, and anode is connected with IGBT pipe emitter stage, and the negative electrode of power diode is merit
The positive terminal of rate switching tube, the anode of power diode is the negative pole end of power switch pipe.
Non-isolated high no-load voltage ratio two-way DC converter the most according to claim 1, it is characterised in that: described first unidirectional current
It is parallel with the first electric capacity (C1) between positive pole and the negative pole in source (V1), is parallel with between positive pole and the negative pole of the second DC source (V2)
Second electric capacity (C2).
Non-isolated high no-load voltage ratio two-way DC converter the most according to claim 1, it is characterised in that: described first inductance (L1)
It is discrete inductance or coupling inductance with the second inductance (L2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610460723.9A CN105846674B (en) | 2016-06-21 | 2016-06-21 | Non-isolated high no-load voltage ratio two-way DC converter |
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| CN201610460723.9A CN105846674B (en) | 2016-06-21 | 2016-06-21 | Non-isolated high no-load voltage ratio two-way DC converter |
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| CN105846674A true CN105846674A (en) | 2016-08-10 |
| CN105846674B CN105846674B (en) | 2019-04-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108347164A (en) * | 2018-03-13 | 2018-07-31 | 深圳市保益新能电气有限公司 | A kind of non-isolation type two-way changing circuit and its control method |
| CN110086340A (en) * | 2019-04-30 | 2019-08-02 | 福州大学 | A kind of two-way large velocity ratio DC-DC converter of novel coupling inductance |
| CN110611425A (en) * | 2019-08-30 | 2019-12-24 | 电子科技大学 | Current sharing method based on series-parallel Boost converter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108347164A (en) * | 2018-03-13 | 2018-07-31 | 深圳市保益新能电气有限公司 | A kind of non-isolation type two-way changing circuit and its control method |
| CN108347164B (en) * | 2018-03-13 | 2024-05-10 | 深圳市保益新能电气有限公司 | Non-isolated bidirectional conversion circuit and control method thereof |
| CN110086340A (en) * | 2019-04-30 | 2019-08-02 | 福州大学 | A kind of two-way large velocity ratio DC-DC converter of novel coupling inductance |
| CN110086340B (en) * | 2019-04-30 | 2020-10-02 | 福州大学 | Coupling inductance bidirectional large-transformation-ratio DC-DC converter |
| CN110611425A (en) * | 2019-08-30 | 2019-12-24 | 电子科技大学 | Current sharing method based on series-parallel Boost converter |
| CN110611425B (en) * | 2019-08-30 | 2021-08-06 | 电子科技大学 | Current sharing method based on series-parallel Boost converter |
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| CN105846674B (en) | 2019-04-30 |
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