CN206834989U - With double circuit, the staggered switching power unit of more circuits input series connection for eliminating circulation function - Google Patents
With double circuit, the staggered switching power unit of more circuits input series connection for eliminating circulation function Download PDFInfo
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- CN206834989U CN206834989U CN201720668133.5U CN201720668133U CN206834989U CN 206834989 U CN206834989 U CN 206834989U CN 201720668133 U CN201720668133 U CN 201720668133U CN 206834989 U CN206834989 U CN 206834989U
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Abstract
With double circuit, the staggered switching power unit of more circuits input series connection for eliminating circulation function, belong to switch power technology field, the utility model is solves the problems, such as to be currently based on the integrated input of transformer and connect between series circuit existing for staggered DC converter circulation to be present and series circuit quantity is difficult to increase.The staggered switching power unit scheme of the utility model double circuit input series connection：The staggered switching power unit of the input series connection is the biswitch positive activation type circuit being made up of two positive activation type on-off circuits, and the input power of two positive activation type on-off circuits is connected, and each positive activation type on-off circuit has two switching tubes and two clamp diodes；Produced in the circulation of each positive activation type on-off circuit and voltage source is sealed on loop, the voltage source is used to offset circulation.Staggered switching power unit of connecting is inputted with the more circuits for eliminating circulation function, including the staggered switching power unit of double circuit input series connection with elimination circulation function.
Description
Technical field
The utility model belongs to switch power technology field, and in particular to double circuit, more circuits input staggered open of connecting
Loop technology between each series circuit of elimination of powered-down source device.
Background technology
At present, various high input voltage occasions gradually increase, and are limited by factors such as device voltage class, how effectively to drop
The voltage stress of low each switching device is always the difficult point in high tension transformer design process.In order to solve high tension transformer voltage
The problem of stress is high, people pass through shares high pressure frequently with by multiple circuits in the form that input side is connected.
For inputting series type inverter, its mission critical is that the input for realizing each series circuit is pressed.At present, close
It is relatively more in the research of various pressure equalizing control methods, but as use existing various control methods, must increase by one it is high-precision
The controller of degree, this undoubtedly adds the complexity of controlling unit, reduces the reliability of converter.
Except the research of various pressure equalizing control methods, in recent years, people can also realize input string that nature presses to some
Connection code converter is studied.Among the input series type inverter that these are pressed naturally, integrated based on transformer defeated
Entering series interleaved code converter has obvious advantage, is mainly reflected in：(1) 2 series circuit can realize the near of input voltage
Like dividing equally, the actual magnitude of voltage born of each series circuit is reduced；(2) 2 series circuits staggeredly work so that integrated transformation
Device bidirectional excitation, the utilization rate of magnetic core of transformer is improved, reduce magnetic core of transformer volume；(3) use of integrated transformer,
It is easily achieved the multiple-channel output of converter.
As Fig. 1 (a) show the staggered DC converter of input series connection integrated based on transformer existing at present.The change
Parallel operation is made up of 2 input series circuits, and 2 series circuits share 1 integrated transformer T.Wherein：UiElectricity is inputted for direct current
Pressure, Ui1、Ui2For the input voltage of each series circuit, Ci1、Ci2(Ci1=Ci2) be each series circuit input side filter capacitor,
S11、S12、S21、S22For the switching tube (generally power MOSFET switching tube) of circuit.In integrated transformer T, 2 primary sides around
Group has identical number of turn np, 2 vice-side windings also have identical number of turn ns, " stain " in figure on each winding represents transformation
The Same Name of Ends corresponding relation of each winding of device.In output loop, Do1、Do2To export commutation diode, LfFor output inductor,
C is output filter capacitor, and R loads for converter, UoFor VD.
Switching tube (the S inside each series circuit shown in Fig. 1 (a)11、S12Or S21、S22) Simultaneous Switching work, often
Individual series circuit interleaved switching work, i.e. S11、S12With S21、S22Switching sequence it is complementary, as shown in Fig. 1 (b).
In the running of converter, if (U is pressed in the input of 2 series circuits completelyi1=Ui2=Ui/ 2), then when
Switching tube S11、S12Conducting, S21、S22During shut-off, (input voltage is U to series circuit 1 i.e. in figurei1Series circuit) by integrated
Transformer transmits energy to outlet side, as switching tube S11、S12Shut-off, S21、S22During conducting, series circuit 2 (inputs electricity i.e. in figure
Press as Ui2Series circuit) by integrated transformer to outlet side transmit energy.As shown in Figure 2.
2 problems are primarily present based on the staggered DC converter of input series connection that transformer integrates shown in Fig. 1 (a)：
Circulation be present between (1) 2 series circuit
As seen from Figure 2：Work as S11、S12During conducting, Ci1Released energy to outlet side, Ci1、Ci2It is together in series and is transfused to
Electric current IiCharging, in this process, keeping Ui1+Ui2=UiOn the premise of, Ui1Decline, Ui2Rise；Work as S21、S22During conducting,
Ci2Released energy to outlet side, Ci1、Ci2It is together in series and is transfused to electric current IiCharging, in this process, keeping Ui1+Ui2=
UiOn the premise of, Ui1Rise, Ui2Decline.
Due to the presence of said process, the actual value of 2 series circuit input voltages will be around Ui/ 2 fluctuations, such as Fig. 3
It is shown.
For circuit shown in Fig. 2 (a), in S11、S12Beginning initial stage is turned on, is had：Ui1>Ui2, due to 2 series circuit transformations
The coupling of device primary side winding, will appear from Ci1Energy by integrated transformer to Ci2The situation of transmission, such as Fig. 4 (a) institutes
Show, caused circulation is as is shown in phantom lines；For circuit shown in Fig. 2 (b), in S21、S22Beginning initial stage is turned on, is had：Ui2>Ui1,
Due to the coupling of 2 series circuit transformers primary side windings, C will appear fromi2Energy by integrated transformer to Ci1Transmit
Situation, as shown in Fig. 4 (b), caused circulation is as is shown in phantom lines.Thus, circulation is generated between 2 series circuits.
The generation of the circulation causes efficiency, the reliability of converter to decline.
It is general at present to use increase input filter capacitor Ci1、Ci2The method of value suppresses the circulation, in order to reach preferable effect
Fruit, Ci1、Ci2Value will generally increase by tens times even more than hundred times.Interleaved series scheme is to reduce in itself in Fig. 1 (a)
Magnetic core of transformer volume, but Ci1、Ci2The increase of value causes increasing considerably for the electric capacity volume, in this case, becomes
The overall volume of parallel operation can even increase.
(2) series interleaved principle is themselves such that it (is typically all 2 circuits that the series circuit quantity of the converter, which is difficult to increase,
Series interleaved work), it can not further reduce the voltage stress of each series circuit in high input voltage occasion.
Utility model content
The purpose of the utility model is to solve to be currently based on the integrated staggered DC converter of input series connection of transformer
Circulation between existing series circuit be present and the problem of series circuit quantity is difficult to increase, there is provided one kind, which has, eliminates circulation
The staggered switching power unit of input series connection of function, can eliminate circulation between each series circuit.
The utility model includes two kinds：Double circuit, more circuit structures.
Described to have the staggered switching power unit of double circuit input series connection for eliminating circulation function, the input series connection is handed over
Shift switching power unit is the biswitch positive activation type circuit being made up of two positive activation type on-off circuits, and two positive activation type switches are electric
The input power series connection on road, each positive activation type on-off circuit have two switching tubes and two clamp diodes；
Produced in the circulation of each positive activation type on-off circuit and voltage source is sealed on loop, the voltage source is used to offset ring
Stream.
Preferably, the mode that two positive activation type on-off circuits seal in voltage source is identical, goes here and there and is propped up where clamp diode
Lu Zhong.
Preferably, a voltage is sealed in branch road where one of clamp diode of each positive activation type on-off circuit
Source UD, the voltage source UDValue be more than or equal to positive activation type on-off circuit input power both end voltage peak-to-valley difference.
Preferably, two positive activation type on-off circuits seal in voltage source UDThe position of clamp diode be corresponding.
Preferably, a voltage source U is respectively sealed in branch road where two clamp diodes in positive activation type on-off circuitD/
2, wherein UDValue be more than or equal to positive activation type on-off circuit input power both end voltage peak-to-valley difference.
Preferably, voltage source is realized using voltage-regulator diode.
Preferably, voltage source is realized using electric capacity, resistor coupled in parallel branch road.
Preferably, voltage source is realized using multiple Diode series branch roads.
Staggered switching power unit of connecting is inputted with the more circuits for eliminating circulation function, including it is described with elimination ring
Flow the staggered switching power unit of double circuit input series connection of function.
The advantages of the utility model：The utility model eliminates ring using voltage source is increased on the generation loop of circulation
Stream, means are easy and effective, on the premise of device volume is not increased, do not influence the original function of primary circuit, effectively eliminate
Circulation between each series circuit, this technology are advantageous to promote on a large scale.
Brief description of the drawings
Fig. 1 is the existing input staggered DC converter topological diagram of series connection integrated based on transformer and its each switching tube
Basic switch timing diagram；For biswitch positive activation type circuit, wherein (a) is DC converter topological diagram；(b) it is the base of each switching tube
This switching sequence figure.
Fig. 2 is the course of work of converter shown in Fig. 1, and (a) is S11、S12Conducting, S21、S22During shut-off, (b) is S11、S12
Shut-off, S21、S22During conducting.
Fig. 3 is the basic fluctuation oscillogram of 2 series circuit input voltages in converter shown in Fig. 1；
Fig. 4 is the generation schematic diagram of two positive activation type on-off circuit input side circulation in converter shown in Fig. 1；(a) under being
During the positive activation type on-off circuit work of side, upside positive activation type on-off circuit produces the current trend figure (part shown in dotted line) of circulation；
(b) when being worked for upside positive activation type on-off circuit, downside positive activation type on-off circuit produces the current trend figure of circulation (shown in dotted line
Part)；
Fig. 5 is that the staggered switching power unit circuit of input series connection with elimination circulation function described in the utility model is opened up
Figure is flutterred, one group of biswitch positive activation type on-off circuit is only drawn, wherein (a) is in D11、D21Upper series electrical potential source UD, (b) is in D12、D22
Upper series electrical potential source UD, (c) is in D11、D12、D21、D22Upper series electrical potential source UD/2；
Fig. 6 is the schematic diagram that two positive activation type circuit input side circulation shown in Fig. 5 eliminate, and (a) is S11、S12Conducting,
S21、S22During shut-off (during the positive activation type on-off circuit work of downside), (b) is S11、S12Shut-off, S21、S22(upside is just during conducting
When swashing the work of formula on-off circuit)；
Fig. 7 is voltage source UDImplementation, (a) uses voltage-regulator diode, and (b) uses resistance capacitance parallel circuit, (c)
Using multiple diode series circuits；
Fig. 8 is that the staggered switching power unit circuit of input series connection with elimination circulation function described in the utility model is opened up
Figure is flutterred, gives n group biswitch positive activation type circuits, wherein being interlocked using more circuit connected in series of device described in the utility model structure
Type DC converter implementation；
Fig. 9 is the basic switch timing diagram of each switching tube of converter described in Fig. 8.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 3, Fig. 5~Fig. 7, have described in present embodiment
The staggered switching power unit of double circuit input series connection of circulation function is eliminated,
Two positive activation type on-off circuit input powers are respectively that two electric capacity provide, and its both end voltage is respectively Ui1、Ui2,
Its value changes with the charge and discharge process of electric capacity, and specific change procedure is as shown in Figure 3.The peak-to-valley difference of input power both end voltage
It is worth for Δ Ui12。
In order to eliminate the circulation between each series circuit, basic thought of the present utility model is increased on the generation loop of circulation
Power up potential source UD, wherein UDValue should be more than Ui1With Ui2Maximum different value, i.e. UD>ΔUi12(such as Fig. 3).In the production of circulation
Increase voltage source shares 3 kinds of forms on raw loop：(1) as shown in Fig. 5 (a), in D11、D21Upper series electrical potential source UD；(2) such as Fig. 5
(b) shown in, in D12、D22Upper series electrical potential source UD；(3) as shown in Fig. 5 (c), in D11、D12、D21、D22Upper series electrical potential source UD/2。
Increase voltage source U is introduced by taking Fig. 5 (a) as an example belowDAfterwards, between each series circuit circulation elimination principle.
As shown in Fig. 6 (a), in S11、S12Beginning initial stage is turned on, although Ui1>Ui2, but Ui1<Ui2+UD, so Ci1Energy
Amount will not be again by integrated transformer to Ci2Transmit；In S21、S22Beginning initial stage is turned on, although Ui2>Ui1, but Ui2<Ui1+UD,
So Ci2Energy will not be again by integrated transformer to Ci1Transmit.Therefore, the circulation between series loop is respectively eliminated.
The voltage source U to connect in circuitDIt can be realized using several schemes as shown in Figure 7.As shown in Fig. 7 (a)
To use rated voltage as UDVoltage-regulator diode；As Fig. 7 (b) is shown using resistance capacitance parallel circuit, wherein, electric capacity electricity
Pressure approximately constant is UD(actually having a little fluctuation), the larger a little release for being mainly used in energy on electric capacity of the resistance of resistance, with
Prevent that electric capacity is over-pressed；As Fig. 7 (c) is shown by the way of multiple Diode series, the wherein conduction voltage drop of series diode
Sum is UD。
Present embodiment increase voltage source is succinctly effective to offset the technological means of circulation, i.e., cost-effective, and and can produces
Good technique effect.
Embodiment two：Illustrate present embodiment with reference to Fig. 8 and Fig. 9, have described in present embodiment and eliminate
The staggered switching power unit of more circuits input series connection of circulation function, including have described in embodiment one and eliminate circulation function
Double circuit input connect staggered switching power unit.Its structure is as shown in figure 8, its timing diagram is as shown in Figure 9.
In high input voltage occasion, in order to further reduce the voltage stress of each series circuit, the utility model proposes it is more
The staggered DC converter scheme of circuit connected in series is as shown in Figure 8.All series circuits of the converter are divided into A, B two in figure
Group, every group includes n (n >=1) individual series circuit, and 2 groups include altogether 2n series circuit and (extend 2 original series circuits
For 2n series circuit).Wherein, in Fig. 8 each series circuit can use with each series circuit identical structure in Fig. 5, this
In provided by taking series circuit in Fig. 5 (a) as an example.
In fig. 8, equivalent to including the staggered Switching Power Supply dress of double circuit input series connection described in n embodiment one
Put, UAi1,UAi2,...,UAinAnd UBi1,UBi2,...,UBinThe respectively input voltage of two groups of each series circuits of A, B；CAi1,
CAi2,...,CAinAnd CBi1,CBi2,...,CBin(CAi1=CAi2=...=CAin=CBi1=CBi2=...=CBin) it is respectively A, B
The input filter capacitor of two groups of each series circuits；SA11,SA12,SA21,SA22,...,SAn1,SAn2And SB11,SB12,SB21,
SB22,...,SBn1,SBn2Switching tube respectively in two groups of each series circuits of A, B；DA11,DA12,DA21,DA22,...,DAn1,DAn2
And DB11,DB12,DB21,DB22,...,DBn1,DBn2Diode respectively in two groups of each series circuits of A, B；Each series circuit is still
An integrated transformer T is so shared, wherein, 2n primary side winding of integrated transformer has identical number of turn np。
It is illustrated in figure 9 the basic switch sequential of each switching tube of more staggered DC converters of circuit connected in series in Fig. 8.Its
In, the switching tube Simultaneous Switching used inside two groups of A, B works, the switching tube of A group series circuits and the switch of B group series circuits
Pipe staggeredly works, i.e. the switching sequence of two groups of series circuit switches pipes of A, B is complementary.
Claims (8)
1. with the staggered switching power unit of double circuit input series connection for eliminating circulation function, the double circuit input series connection is handed over
Shift switching power unit is the biswitch positive activation type circuit being made up of two positive activation type on-off circuits, and two positive activation type switches are electric
The input power series connection on road, each positive activation type on-off circuit have two switching tubes and two clamp diodes；
Characterized in that, sealing in voltage source on the circulation generation loop of each positive activation type on-off circuit, the voltage source is used for
Offset circulation.
2. there is the staggered switching power unit of double circuit input series connection for eliminating circulation function according to claim 1, its
It is characterised by, the mode that two positive activation type on-off circuits seal in voltage source is identical, goes here and there in branch road where clamp diode.
3. there is the staggered switching power unit of double circuit input series connection for eliminating circulation function according to claim 2, its
It is characterised by, a voltage source U is sealed in branch road where one of clamp diode of each positive activation type on-off circuitD,
The voltage source UDValue be more than or equal to positive activation type on-off circuit input power both end voltage peak-to-valley difference.
4. there is the staggered switching power unit of double circuit input series connection for eliminating circulation function according to claim 3, its
It is characterised by, two positive activation type on-off circuits seal in voltage source UDThe position of clamp diode be corresponding.
5. there is the staggered switching power unit of double circuit input series connection for eliminating circulation function according to claim 2, its
It is characterised by, a voltage source U is respectively sealed in branch road where two clamp diodes in positive activation type on-off circuitD/ 2, wherein UD
Value be more than or equal to positive activation type on-off circuit input power both end voltage peak-to-valley difference.
6. have the double circuit input series connection for eliminating circulation function staggered according to Claims 1 to 5 any claim
Switching power unit, it is characterised in that voltage source is realized using voltage-regulator diode.
7. have the double circuit input series connection for eliminating circulation function staggered according to Claims 1 to 5 any claim
Switching power unit, it is characterised in that voltage source is realized using electric capacity, resistor coupled in parallel branch road.
8. have the double circuit input series connection for eliminating circulation function staggered according to Claims 1 to 5 any claim
Switching power unit, it is characterised in that voltage source is realized using multiple Diode series branch roads.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720668133.5U CN206834989U (en) | 2017-06-09 | 2017-06-09 | With double circuit, the staggered switching power unit of more circuits input series connection for eliminating circulation function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359796A (en) * | 2017-07-17 | 2017-11-17 | 华南理工大学 | A kind of dual input normal shock type Z sources DC voltage converter |
| CN110649813A (en) * | 2019-09-09 | 2020-01-03 | 浙江大学 | Isolated integrated three-port bidirectional DCDC converter |
-
2017
- 2017-06-09 CN CN201720668133.5U patent/CN206834989U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359796A (en) * | 2017-07-17 | 2017-11-17 | 华南理工大学 | A kind of dual input normal shock type Z sources DC voltage converter |
| CN107359796B (en) * | 2017-07-17 | 2020-05-22 | 华南理工大学 | Double-input forward Z-source direct-current voltage converter |
| CN110649813A (en) * | 2019-09-09 | 2020-01-03 | 浙江大学 | Isolated integrated three-port bidirectional DCDC converter |
| CN110649813B (en) * | 2019-09-09 | 2020-11-10 | 浙江大学 | Isolated integrated three-port bidirectional DCDC converter |
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