CN105846674B - Non-isolated high no-load voltage ratio two-way DC converter - Google Patents
Non-isolated high no-load voltage ratio two-way DC converter Download PDFInfo
- Publication number
- CN105846674B CN105846674B CN201610460723.9A CN201610460723A CN105846674B CN 105846674 B CN105846674 B CN 105846674B CN 201610460723 A CN201610460723 A CN 201610460723A CN 105846674 B CN105846674 B CN 105846674B
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- inductance
- switch tube
- power switch
- power
- power supply
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Classifications
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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
Abstract
The present invention relates to a kind of non-isolated high no-load voltage ratio two-way DC converters.Its purpose is to provide a kind of two-way DC converter small in size, voltage change ratio is high, high-efficient.The present invention includes the first DC power supply, the second DC power supply, the first inductance, the second inductance, the first power switch tube, the second power switch tube and third power switch tube.The cathode of first DC power supply is connect with the negative pole end of the first power switch tube, the positive terminal of first power switch tube is connect with one end of the first inductance, the other end of first inductance is connect with the anode of the first DC power supply, the anode of first DC power supply is connect with the positive terminal of the second power switch tube, the negative pole end of second power switch tube is connect with one end of the second inductance, the other end of second inductance is connect with the cathode of the second DC power supply, between first power switch tube and the first inductance, conducting wire is distinguished between second power switch tube and the second inductance, the other end of conducting wire accesses the second DC power supply.
Description
Technical field
The present invention relates to power electronics frequency conversion fields, more particularly to a kind of non-isolated high no-load voltage ratio two-way DC converter.
Background technique
Two-way DC converter is used to carry out two-way energy transmission between two DC power supplies, is widely used in work at present
Industry field, such as hybrid electric automobiles on energy management system, uninterruptible power supply, fuel cell hybrid generation system, photovoltaic mixing hair
Electric system and battery charger etc..
Widely used two-way DC converter mainly includes that traditional two-way DC converter and isolated form are double at this stage
To DC converter.Traditional two-way DC converter structure is simple, is widely used, but there is also the following disadvantages: (1) when
When needing biggish no-load voltage ratio occasion, operative duty cycles are very big, therefore the time shared by energy transmission mode is few, and efficiency is caused to drop
It is low；(2) boost inductance needed for is big, whole input currents is flowed through on inductance, the current value of inductance is input current value, due to work
It is big to make duty ratio, the inductive energy storage time is long, causes inductive current ripple big, and inductance volume and weight is big；(3) power switch is connected
When flow through whole inductive currents, that is, flow through input current, on-state loss is big, low efficiency；(4) due to output current ripple
Greatly, it needs to select biggish filter capacitor, increases the volume and cost of system.Isolation type bidirectional DC converter needs pass through
The turn ratio of isolating transformer is adjusted to obtain higher boosting and antihypertensive effect, causes whole system working efficiency relatively low.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of non-isolated high changes small in size, voltage change ratio is high, high-efficient
Compare two-way DC converter.
The non-isolated high no-load voltage ratio two-way DC converter of the present invention, wherein including the first DC power supply, the second DC power supply,
First inductance, the second inductance, the first power switch tube and the second power switch tube, the cathode of the first DC power supply and the first power
The negative pole end of switching tube connects, and the positive terminal of the first power switch tube is connect with one end of the first inductance, the first inductance it is another
It holds and is connect with the anode of the first DC power supply, the anode of the first DC power supply is connect with the positive terminal of the second power switch tube, the
The negative pole end of two power switch tubes is connect with one end of the second inductance, the cathode of the other end of the second inductance and the second DC power supply
The first conducting wire, the other end and third power switch of the first conducting wire are drawn in connection between the first power switch tube and the first inductance
The negative pole end of pipe connects, and the positive terminal of third power switch tube is connect with the anode of the second DC power supply, in the second power switch
The second conducting wire is drawn between pipe and the second inductance, the other end of the second conducting wire is connect with the cathode of the second DC power supply.
The non-isolated high no-load voltage ratio two-way DC converter of the present invention, wherein first power switch tube, the second power switch
Pipe and third power switch tube are all made of metal-oxide-semiconductor and power diode, and the drain electrode of the cathode and metal-oxide-semiconductor of power diode connects
It connects, the source electrode connection of anode and metal-oxide-semiconductor, the cathode of power diode is the positive terminal of power switch tube, the sun of power diode
The extremely negative pole end of power switch tube.
The non-isolated high no-load voltage ratio two-way DC converter of the present invention, wherein first power switch tube, the second power switch
Pipe and third power switch tube are all made of IGBT pipe and power diode, and the cathode and IGBT pipe collector of power diode connect
It connects, anode is connect with IGBT pipe emitter, and the cathode of power diode is the positive terminal of power switch tube, the sun of power diode
The extremely negative pole end of power switch tube.
The non-isolated high no-load voltage ratio two-way DC converter of the present invention, wherein between the anode and cathode of first DC power supply
It is parallel with first capacitor, is parallel with the second capacitor between the anode and cathode of the second DC power supply.
The non-isolated high no-load voltage ratio two-way DC converter of the present invention, wherein first inductance and the second inductance are discrete inductance
Or coupling inductance.
The non-isolated high no-load voltage ratio two-way DC converter difference from prior art of the present invention is: DC power supply of the present invention
Both ends are connected with the first bridge arm and the second bridge arm, and the first bridge arm is made of the first power switch tube and the first inductance, the second bridge arm
It is made of the second power switch tube and the second inductance, the first power switch tube and the second function compared with existing two-way DC converter
The duty ratio of rate switching tube reduces, and biggish voltage change ratio can be generated during voltage transformation.First inductance and the second electricity
Part input current is flowed only through in sense respectively, the current value on the first inductance and the second inductance is less than the electric current of DC power supply output
Value, therefore, the first inductance and the second inductance are smaller, and the current ripples of the first inductance and the second inductance are smaller, reduce the present invention
Volume.Electric current smaller due to flowing through the current value on the first inductance and the second inductance, when each power switch tube is connected
Smaller, the on-state loss of each power switch tube is small, more efficient.Because the current ripples of the first inductance and the second inductance compared with
It is small, lesser first capacitor can be used and the second capacitor is filtered, also further reduce volume and weight of the invention.
The non-isolated high no-load voltage ratio two-way DC converter of the present invention is described further with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the circuit structure diagram of the non-isolated high no-load voltage ratio two-way DC converter of the present invention；
Circuit structure diagram when Fig. 2 is non-isolated high no-load voltage ratio two-way DC converter boosting inverter mode of the invention；
Circuit structure diagram when Fig. 3 is non-isolated high no-load voltage ratio two-way DC converter decompression transformation mode of the invention.
Specific embodiment
As shown in Figure 1, for the circuit structure diagram of the non-isolated high no-load voltage ratio two-way DC converter of the present invention, including the first direct current
Power supply V1, the second DC power supply V2, the first inductance L1, the second inductance L2, the first power switch tube S 1, the second power switch tube S 2
With third power switch tube S 3.The cathode of first DC power supply V1 is connect with the negative pole end of the first power switch tube S 1, the first function
The positive terminal of rate switching tube S1 is connect with one end of the first inductance L1, the other end of the first inductance L1 and the first DC power supply V1's
The anode of anode connection, the first DC power supply V1 is connect with the positive terminal of the second power switch tube S 2, the second power switch tube S 2
Negative pole end connect with one end of the second inductance L2, the other end of the second inductance L2 is connect with the cathode of the second DC power supply V2,
First capacitor C1 is also parallel between the anode and cathode of the first DC power supply V1.In the first power switch tube S 1 and the first electricity
The first conducting wire is drawn between sense L1, the other end of the first conducting wire is connect with the negative pole end of third power switch tube S 3, third power
The positive terminal of switching tube S3 is connect with the anode of the second DC power supply S2, between the second power switch tube S 2 and the second inductance L2
Draw the second conducting wire, the other end of the second conducting wire is connect with the cathode of the second DC power supply S2, the second DC power supply V2 just
The second capacitor C2 is also parallel between pole and cathode.
First power switch tube S 1, the second power switch tube S 2 and third power switch tube S 3 of the invention is all by metal-oxide-semiconductor
It forms with power diode, or is made of IGBT pipe and power diode.When using metal-oxide-semiconductor and power diode, power two
The drain electrode of the cathode and metal-oxide-semiconductor of pole pipe connects, and the source electrode of anode and metal-oxide-semiconductor connects, and the cathode of power diode is power switch
The positive terminal of pipe, the anode of power diode are the negative pole end of power switch tube.When using IGBT pipe and power diode, power
The cathode of diode is connect with IGBT pipe collector, and anode is connect with IGBT pipe emitter, and the cathode of power diode is power
The positive terminal of switching tube, the anode of power diode are the negative pole end of power switch tube.
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 shown in Fig. 2, disconnecting the second DC power supply V2, and in former second direct current
Position access the load R, the first power switch tube S 1 and the first inductance L1 of source V2 forms the first bridge arm, the second power switch tube S 2
The second bridge arm is formed with the second inductance L2, the voltage of the first DC power supply V1 carries out boosting change by the first bridge arm and the second bridge arm
It changes, is the voltage V at the second both ends capacitor C2 by the voltage transformation of the first DC power supply V1C2It adds at the load both ends R, to complete
Boost process.First capacitor C1 and the second capacitor C2 play filter action in boost process, and third power switch tube S 3 passes through
The characteristic of itself on and off plays the role of protecting circuit.
The present invention is when carrying out decompression transformation, as shown in figure 3, disconnecting the first DC power supply V1, and in former first direct current
Position access the load R, the first power switch tube S 1 and the first inductance L1 of source V1 forms the first bridge arm, the second power switch tube S 2
The second bridge arm is formed with the second inductance L2, the voltage of the second DC power supply V2 carries out boosting change by the first bridge arm and the second bridge arm
It changes, is the voltage V at the both ends first capacitor C1 by the voltage transformation of the second DC power supply V2C1It adds at the load both ends R, to complete
Pressure reduction.First capacitor C1 and the second capacitor C2 play filter action in pressure reduction, and third power switch tube S 3 passes through
The characteristic of itself on and off plays the role of protecting circuit.
The non-isolated no-load voltage ratio two-way DC converter of the present invention, DC power supply both ends are connected with the first bridge arm and the second bridge arm,
First bridge arm is made of the first power switch tube S 1 and the first inductance L1, and the second bridge arm is by the second power switch tube S 2 and the second electricity
Feel L2 composition, the duty ratio of the first power switch tube S 1 and the second power switch tube S 2 subtracts compared with existing two-way DC converter
It is small, biggish voltage change ratio can be generated during voltage transformation.It is flowed only through respectively on first inductance L1 and the second inductance L2
Part input current, the current value on the first inductance L1 and the second inductance L2 are less than the current value of DC power supply output, therefore, the
One inductance L1 and the second inductance L2 are smaller, and the current ripples of the first inductance L1 and the second inductance L2 are smaller, reduce of the invention
Volume.Electric current smaller due to flowing through the current value on the first inductance L1 and the second inductance L2, when each power switch tube is connected
Also smaller, the on-state loss of each power switch tube is small, more efficient.Because of the electric current line of the first inductance L1 and the second inductance L2
Wave is smaller, and lesser first capacitor C1 can be used and the second capacitor C2 is filtered, also further reduce volume of the invention
And weight.The present invention is small in size, voltage change ratio is high, high-efficient, has clear advantage compared with prior art.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (4)
1. a kind of non-isolated high no-load voltage ratio two-way DC converter, it is characterised in that: including the first DC power supply (V1), the second direct current
Power supply (V2), the first inductance (L1), the second inductance (L2), the first power switch tube (S1), the second power switch tube (S2) and
The cathode of three power switch tubes (S3), the first DC power supply (V1) is connect with the second end of the first power switch tube (S1), and first
The first end of power switch tube (S1) is connect with one end of the first inductance (L1), the other end and the first direct current of the first inductance (L1)
The anode connection of power supply (V1), the anode of the first DC power supply (V1) are connect with the first end of the second power switch tube (S2), the
The second end of two power switch tubes (S2) is connect with one end of the second inductance (L2), and the other end of the second inductance (L2) and second is directly
The cathode in galvanic electricity source (V2) connects, and the first conducting wire is drawn between the first power switch tube (S1) and the first inductance (L1), first leads
One end of line is connect with the second end of third power switch tube (S3), the first end and the second direct current of third power switch tube (S3)
The anode connection of power supply (S2), draws the second conducting wire, second leads between the second power switch tube (S2) and the second inductance (L2)
One end of line is connect with the cathode of the second DC power supply (S2)；
It is parallel with first capacitor (C1) between the anode and cathode of first DC power supply (V1), at the second DC power supply (V2)
Anode and cathode between be parallel with the second capacitor (C2).
2. non-isolated high no-load voltage ratio two-way DC converter according to claim 1, it is characterised in that: first power is opened
It closes pipe (S1), the second power switch tube (S2) and third power switch tube (S3) to be all made of metal-oxide-semiconductor and power diode, power
The drain electrode of the cathode and metal-oxide-semiconductor of diode connects, and the source electrode of anode and metal-oxide-semiconductor connects, and the cathode of power diode is opened for power
The positive terminal of pipe is closed, the anode of power diode is the negative pole end of power switch tube.
3. non-isolated high no-load voltage ratio two-way DC converter according to claim 1, it is characterised in that: first power is opened
It closes pipe (S1), the second power switch tube (S2) and third power switch tube (S3) to be all made of IGBT pipe and power diode, function
The cathode of rate diode is connect with IGBT pipe collector, and anode is connect with IGBT pipe emitter, and the cathode of power diode is function
The positive terminal of rate switching tube, the anode of power diode are the negative pole end of power switch tube.
4. non-isolated high no-load voltage ratio two-way DC converter according to claim 1, it is characterised in that: first inductance
(L1) and the second inductance (L2) is discrete inductance or coupling inductance.
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 CN105846674A (en) | 2016-08-10 |
| CN105846674B true CN105846674B (en) | 2019-04-30 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086340B (en) * | 2019-04-30 | 2020-10-02 | 福州大学 | Coupling inductance bidirectional large-transformation-ratio DC-DC 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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2016
- 2016-06-21 CN CN201610460723.9A patent/CN105846674B/en active Active
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| EP2903125A1 (en) * | 2012-09-29 | 2015-08-05 | Emerson Network Power Co., Ltd | Ups and dc/dc circuit thereof |
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