CN108075669A - The DC-DC converter of the integrated cascade structure of band - Google Patents
The DC-DC converter of the integrated cascade structure of band Download PDFInfo
- Publication number
- CN108075669A CN108075669A CN201711353077.7A CN201711353077A CN108075669A CN 108075669 A CN108075669 A CN 108075669A CN 201711353077 A CN201711353077 A CN 201711353077A CN 108075669 A CN108075669 A CN 108075669A
- Authority
- CN
- China
- Prior art keywords
- diode
- transformer
- switch tube
- converter
- boost circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims description 30
- 238000004804 winding Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000844 transformation Methods 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
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses the DC DC converters that a kind of band integrates cascade structure, the band, which integrates, is integrated with Boost circuit, Buck Boost circuits and transformer in the DC DC converters of cascade structure, wherein, the input terminal of the Boost circuit and extraneous DC power supply VinConnection, the output terminal of the Boost circuit are connected with the primary coil of the transformer, and the secondary coil of the transformer is connected with the input terminal of the Buck Boost circuits, the output terminal of the Buck Boost circuits and extraneous load R0Connection.Compared with the prior art, the present invention realizes larger voltage gain, improves the integrated level of converter and the work efficiency of transformer, and reduce the voltage stress of switching tube.
Description
Technical Field
The invention relates to the technical field of DC-DC converters, in particular to a DC-DC converter with an integrated cascade structure.
Background
In a distributed power generation system or a battery powered system, it is generally required to employ a high boost DC-DC converter. For example, in a distributed photovoltaic power generation system, the output of the solar panel is a very low dc voltage, and the inverter in the later stage requires an input voltage high enough to obtain an ac output voltage meeting the requirement, so a boost converter with a high enough voltage gain is required to realize energy conversion. As shown in fig. 1, fig. 1 is a diagram of an energy conversion structure of a typical photovoltaic power generation system. As can be seen from the figure, the high-boost DC-DC converter is a key part for connecting the photovoltaic cell panel and the DC bus of the inverter.
The high boost DC-DC converter may be implemented with isolated and non-isolated topologies. In a conventional photovoltaic power generation system, the high-Boost DC-DC converter in fig. 1 generally adopts a Boost circuit, which has a simple circuit structure, a small number of components, and an easily implemented control system. However, when the difference between the input voltage and the output voltage is large, the conversion efficiency of the Boost converter is low, and the voltage gain in the conventional Boost circuit has an inflection point, and when the duty ratio is larger than the inflection point, the voltage gain exhibits a fast drop characteristic.
Generally, where electrical isolation is not required, non-isolated converters have some advantages because their control system is simple and there is no isolation transformer so that a smaller volume can be achieved. However, in some applications where electrical isolation is required to meet safety standards, non-isolated converters do not meet the requirements.
The isolated high-boost DC-DC converter has been widely researched and widely used in practical systems because of its ability to achieve large voltage gain and electrical isolation. Among them, min-Khai Nguyen et al propose an isolated topology of the quasi-switched Boost type, which allows the presence of a shoot-through condition and reduces the turns ratio of the transformer.
However, in the case of the design invented by min-Khai Nguyen et al, since the input side inductance is large, the resonance frequency between the input side inductance and the input side capacitance is lowered, and when the switching frequency is high, the converter is liable to oscillate, and the influence of the transformer leakage inductance on the circuit is not considered. In fact, at the time of switching, the existence of leakage inductance generates a large voltage spike, and the larger the output power is, the larger the voltage spike is, thereby damaging power components in the circuit.
Disclosure of Invention
The invention provides a DC-DC converter with an integrated cascade structure, and aims to realize larger voltage gain and improve the integration level and the working efficiency of the converter through an integrated structure and a small turn ratio of a transformer.
To achieve the above object, the present invention provides a belt setThe DC-DC converter with the integrated cascade structure is internally integrated with a Boost circuit, a Buck-Boost circuit and a transformer, wherein the input end of the Boost circuit is connected with an external direct-current power supply VinThe output end of the Boost circuit is connected with the primary coil of the transformer, the secondary coil of the transformer is connected with the input end of the Buck-Boost circuit, and the output end of the Buck-Boost circuit is connected with an external load R0And (4) connecting.
According to a further technical scheme of the invention, the Boost circuit comprises a capacitor C1Inductor L1Diode D1Diode D2Diode D3Switch tube S1Switch tube S2Switch tube S3And a switch tube S4(ii) a Wherein,
the inductance L1Input terminal of the power supply and an external direct current power supply VinThe positive pole of the inductor L1Respectively with said diode D1Anode, diode D2Anode, diode D3The positive connection of (2); the diode D1Respectively with the capacitor C1One end of the switch tube S1Drain and switch tube S3The drain connection of (1); the switch tube S1Respectively with said diode D2The cathode of (1), the switch tube S2The drain of the transformer is connected with one end of a primary coil of the transformer; the switch tube S3Respectively with said diode D3The cathode of (1), the switch tube S4The other end of the primary coil of the transformer is connected with the drain of the transformer; the capacitor C1The other end of the switch tube S2Source stage of, the switching tube S4Respectively with the external DC power supply VinIs connected to the negative electrode of (1).
The invention has the further technical scheme that the Buck-Boost circuit comprises an inductor L2Diode D4Diode D5Diode D6Diode D7Diode D8And a switch tube S5And a capacitor C2(ii) a Wherein,
the inductance L2Is connected with one end of the transformer, the inductor L2And the other end of the diode D is respectively connected with the diode D4Anode of, the diode D5The cathode of (a) is connected; the diode D4Respectively with said diode D6The cathode of (1), the switch tube S5The diode D8The anode of (2) is connected; the diode D6With the other end of the secondary winding of the transformer and the diode D, respectively7The cathode of (a) is connected; the diode D8Respectively with said capacitor C2One end of, the external load R0The positive electrode of (1) is connected; the diode D7Anode of (2) and the switching tube S5Source electrode of, the capacitor C2The other end of (2), the external resistance R0Respectively with the diode D6Is connected with the anode of (2).
The invention has the beneficial effects that: according to the technical scheme, the Boost circuit, the Buck-Boost circuit and the transformer are integrated in the DC-DC converter with the integrated cascade structure, wherein the input end of the Boost circuit is connected with an external direct-current power supply VinThe output end of the Boost circuit is connected with the primary coil of the transformer, the secondary coil of the transformer is connected with the input end of the Buck-Boost circuit, and the output end of the Buck-Boost circuit is connected with an external load R0The connection realizes larger voltage gain, improves the integration level of the converter and the working efficiency of the transformer, and reduces the voltage stress of the switch tube.
Drawings
FIG. 1 is a diagram of an energy conversion architecture of a prior art photovoltaic power generation system;
fig. 2 is a schematic structural diagram of a first embodiment of the DC-DC converter with an integrated cascade structure according to the present invention;
fig. 3 is a schematic circuit diagram of a second embodiment of the DC-DC converter with an integrated cascade structure according to the present invention;
FIG. 4 is a waveform diagram of inductor L2 operating in DCM;
fig. 5(a) is a schematic diagram of a first stage structure in an equivalent circuit diagram of a second embodiment of the proposed DC-DC converter with an integrated cascade structure;
fig. 5(b) is a schematic diagram of a second stage structure in an equivalent circuit diagram of a second embodiment of the proposed DC-DC converter with an integrated cascade structure;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specifically, referring to fig. 2, fig. 2 is a schematic structural diagram of a first embodiment of a DC-DC converter with an integrated cascade structure according to the present invention.
As shown in fig. 2, the DC-DC converter with the integrated cascade structure provided in this embodiment integrates a Boost circuit, a Buck-Boost circuit, and a transformer, where an input end of the Boost circuit is connected to an external DC power supply VinThe output end of the Boost circuit is connected with the primary coil of the transformer, the secondary coil of the transformer is connected with the input end of the Buck-Boost circuit, and the output end of the Buck-Boost circuit is connected with an external load R0And (4) connecting.
According to the technical scheme, the Boost circuit, the Buck-Boost circuit and the transformer are integrated in the DC-DC converter with the integrated cascade structure, so that large voltage gain is achieved, and the integration level of the converter and the working efficiency of the transformer are improved.
Further, referring to fig. 3, fig. 3 is a circuit structure schematic diagram of a second embodiment of the DC-DC converter with an integrated cascade structure according to the present invention.
Specifically, in this embodiment, the Boost circuit includes a capacitor C1Inductor L1Diode D1Diode D2Diode D3Switch tube S1Switch tube S2Switch tube S3And a switch tube S4. Wherein the inductance L1Input terminal of the power supply and an external direct current power supply VinThe positive pole of the inductor L1Respectively with said diode D1Anode, diode D2Anode, diode D3The positive connection of (2); the diode D1Respectively with the capacitor C1One end of the switch tube S1Drain and switch tube S3The drain connection of (1); the switch tube S1Respectively with said diode D2The cathode of (1), the switch tube S2The drain of the transformer is connected with one end of a primary coil of the transformer; the switch tube S3Respectively with said diode D3The cathode of (1), the switch tube S4The other end of the primary coil of the transformer is connected with the drain of the transformer; the capacitor C1The other end of the switch tube S2Source stage of, the switching tube S4Respectively with the external DC power supply VinIs connected to the negative electrode of (1).
The Buck-Boost circuit comprises an inductor L2Diode D4Diode D5Diode D6Diode D7Diode D8And a switch tube S5And a capacitor C2. Wherein the inductance L2Is connected with one end of the transformer, the inductor L2And the other end of the diode D is respectively connected with the diode D4Anode of, the diode D5The cathode of (a) is connected; the diode D4Respectively with said diode D6The cathode of (1), the switch tube S5The diode D8The anode of (2) is connected; the diode D6With the other end of the secondary winding of the transformer and the diode D, respectively7The cathode of (a) is connected; the diode D8Respectively with said capacitor C2One end of, the external load R0The positive electrode of (1) is connected; the diode D7Anode of (2) and the switching tube S5Source electrode of, the capacitor C2The other end of (2), the external resistance R0Respectively with the diode D6Is connected with the anode of (2).
The circuit principle of this embodiment will be described in detail with reference to fig. 3, 4, 5(a) and 5 (b):
the circuit diagram of the DC-DC converter with integrated cascade structure proposed in this embodiment is shown in fig. 3, where VinIs an input voltage, and VoIs the output voltage. N is transformer TrThe turn ratio of (c). Inductor L2For transformers T in practical systemsrThe sum of the leakage inductance of (a) and the external series inductance.
As shown in fig. 3, the low voltage side is typically connected to the output of the photovoltaic cell or fuel cell, and the high voltage side is the dc bus. Because of the battery property of the low-voltage side, in order to obtain a smaller peak current, the inductance L in the actual circuit1Typically operating in Continuous Conduction Mode (CCM). And an inductance L2It can operate in Discontinuous Conduction Mode (DCM) or Continuous Conduction Mode (CCM). When the circuit parameters are determined, the inductance L2Depending on the size of the load.
To simplify the analysis process, the following assumptions were made:
1) all the switching tubes and the diodes are considered as ideal devices, namely the on-resistance of all the switching tubes and the forward conducting voltage drop of all the diodes are considered as zero;
2) the above-mentionedCapacitor C1And a capacitor C2The capacity value being sufficiently large, i.e. VC1And VC2Constant;
3) the dead time between the upper and lower tubes of the same bridge arm is neglected.
FIG. 4 shows an inductor L2Waveform diagram when operating in DCM. Where Ts is the switching period. D is a switch tube S2And a switching tube S4Duty cycle within one switching period. Delta1Is a time period t1，t2]In a switching period TsThe duty cycle of the capacitor. In DCM, the converter is divided into 6 stages within one switching cycle.
Stage 1[ t ]0-t1]: at t0At any moment, switch tube S1Switching tube S4And a switching tube S5And conducting. At this stage, the input voltage VinThrough a loop D3And S4For inductor L1And (6) charging. At the same time, the voltage VC1Through a loop S1，D4，S5，D7And S4For inductor L2And (6) charging. According to the transformer equivalence principle, the current is applied to the inductor L2Voltage across NVC1. Output voltage VoFrom voltage VC2Provided is a method.
Stage 2[ t ]1-t2]: at t1At any moment, switch tube S4And a switching tube S5Turn-off, switch tube S3And conducting. Inductor L1Through a loop D1，C1And VinAnd then follow current. Inductor L1Is released to the capacitor C1. Inductor L2Through a loop S3，S1，D4，D8，VoAnd D7And then follow current. Inductor L2Is released to the output voltage Vo。
Stage 3[ t ]2-t3]: at t2Time of day, inductance L2End of follow current, inductance L2The current of (c) drops to zero. At this stage, the current flows through the inductor L2Is zero. Although the switch tube S1And a switching tube S3Still in the on state, but no current flows. At the same time, the inductance L1Still operating in the freewheeling state. Output voltage VoFrom voltage VC2Provided is a method.
Stage 4[ t ]3-t4]: at t3At any moment, switch tube S1Turn-off, switch tube S2And a switching tube S5And conducting. This stage is similar to stage 1. However, the inductance L at this stage2Opposite to phase 1. At this stage, the input voltage VinThrough a loop D2And S2For inductor L1And (6) charging. At the same time, the voltage VC1Through a loop S3，D6，S5，D5And S2For inductor L2And (6) charging. Applied to the inductor L2Voltage across NVC1. Output voltage VoFrom voltage VC2Provided is a method.
Stage 5[ t ]4-t5]: at t4At any moment, switch tube S2And a switching tube S5Turn-off, switch tube S1And conducting. This stage is similar to stage 2. At this stage, the inductance L1Through a loop D1，C1And VinAnd then follow current. Inductor L1Is released to the capacitor C1. Inductor L2Through a loop S1，S3，D6，D8，VoAnd D5And then follow current. Inductor L2Is released to the output voltage Vo。
Stage 6[ t ]5-t6]: at t5Time of day, inductance L2End of follow current, inductance L2The current of (c) drops to zero. This stage is similar to stage 3. At this stage, the current flows through the inductor L2Is zero. Output voltage VoFrom voltage VC2Provided is a method.
It should be noted that the present embodiment proposes the integrated cascade structure according to the operation principleThe DC-DC converter is integrated into a non-isolated converter and an isolated converter. The converter with the integrated cascade structure can be equivalent to a two-stage circuit structure. Wherein, in the first stage structure, energy is input from an input voltage VinTo the capacitor C1Performing the following steps; in the second stage structure, energy is transferred from the capacitor C1To the output side. Fig. 5(a) and 5(b) show equivalent circuit diagrams of the DC-DC converter with the integrated cascade structure according to this embodiment.
Fig. 5(a) shows a Boost converter, and fig. 5(b) shows a Buck-Boost converter. In FIG. 5(b), NVC1Is composed of VC1Obtained by equivalent transformation of a transformer.
The Boost converter shown in fig. 5(a) includes an inductor L1Diode D1Switch tube S2Or S4Capacitor C1And a resistor R1(ii) a The inductance L1One end of (1) and a power supply VinThe positive pole of the inductor L1And the other end of the diode D is respectively connected with the diode D1Anode of (2) and the switching tube S2Or S4Said diode D1Respectively with said capacitor C1One end of, the resistor R1Is connected to said power supply VinRespectively with the switching tube S2Or S4Source stage of, said capacitor C1Another terminal of (3), the resistor R1The other end of the connecting rod is connected.
The Buck-Boost converter shown in FIG. 5(b) includes a switching tube S2Or S4Inductance L2Diode D8Diode DS1Or DS3Switching tube S5Capacitor C2Resistance R0. In the above-mentioned fig. 3, the switching tube S1Is connected with the diode D between the source and the drainS1Said diode DS1And the switching tube S1The diode DS1And the switching tube S1The drain connection of (1);the switch tube S2Is connected with the diode D between the source and the drainS2Said diode DS2And the switching tube S2The diode DS2And the switching tube S2Is connected.
In FIG. 5(b), the switch tube S2Or S4And said power supply NVC1Is connected to the positive pole of the switching tube S2Or S4And the source of (2) and the inductance L2One end of the diode DS1Or DS3The cathode of the inductor L2And the other end of the first and second switching tubes S5Said diode D8Of the diode D, the diode D8Respectively with said capacitor C2One end of, the resistor R0Is connected to one end of the power supply NVC1Respectively with the diode DS1Or DS3Anode and said switching tube S5Source stage of, said capacitor C2Another terminal of (3), the resistor R0The other end of the connecting rod is connected.
The operating waveforms of the converter in DCM are shown in fig. 4. Ts is the switching period, switching frequencyAccording to the above analysis, in the positive half periodAnd negative half periodThe operating principle of the converter is the same. Therefore, only the circuit state of the converter in a half cycle needs to be deduced and analyzed.
According to FIGS. 4, 5(a), and 5(b), at time interval [ t ]0,t3]Inner and outer pairs of inductors L1And an inductance L2Applying the principle of volt-second balance, there are
Simplified formula (1) is provided with
Further, according to the operation waveform of FIG. 4, the current iCAt time intervals t0，t3]The average value in the inner is equal to the average current value I on the output sideoThen there is
The expression for obtaining the output power is shown in the following (2) and (3) in a simultaneous manner
In summary, the Boost circuit, the Buck-Boost circuit and the transformer are integrated in the DC-DC converter with the integrated cascade structure, wherein the input end of the Boost circuit is connected with an external direct current power supply VinThe output end of the Boost circuit is connected with the primary coil of the transformer, the secondary coil of the transformer is connected with the input end of the Buck-Boost circuit, and the output end of the Buck-Boost circuit is connected with an external load R0Compared with the prior art, the connection realizes larger voltage gain, improves the integration level of the converter and the working efficiency of the transformer, and reduces the voltage stress of the switching tube.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structures or flow transformations made by the present specification and drawings, or applied directly or indirectly to other related arts, are included in the scope of the present invention.
Claims (3)
1. A DC-DC converter with an integrated cascade structure is characterized in that a Boost circuit, a Buck-Boost circuit and a transformer are integrated in the DC-DC converter with the integrated cascade structure, wherein the input end of the Boost circuit is connected with an external direct-current power supply VinThe output end of the Boost circuit is connected with the primary coil of the transformer, the secondary coil of the transformer is connected with the input end of the Buck-Boost circuit, and the output end of the Buck-Boost circuit is connected with an external load R0And (4) connecting.
2. The DC-DC converter with integrated cascade structure of claim 1, characterized in that the Boost circuit comprises a capacitor C1Inductor L1Diode D1Diode D2Diode D3Switch tube S1Switch tube S2Switch tube S3And a switch tube S4(ii) a Wherein,
the inductance L1Input terminal of the power supply and an external direct current power supply VinThe positive pole of the inductor L1Respectively with said diode D1Anode, diode D2Anode, diode D3The positive connection of (2); the diode D1Respectively with the capacitor C1One end of the switch tube S1Drain and switch tube S3The drain connection of (1); the switch tube S1Respectively with said diode D2The cathode of (1), the switch tube S2The drain of the transformer is connected with one end of a primary coil of the transformer; the switch tube S3Respectively with said diode D3The cathode of (1), the switch tube S4The other end of the primary coil of the transformer is connected with the drain of the transformer; the capacitor C1The other end of the switch tube S2Source stage of, the switching tube S4Respectively with the external DC power supply VinIs connected to the negative electrode of (1).
3. The DC-DC converter with integrated cascade structure of claim 2, wherein the Buck-Boost circuit comprises an inductor L2Diode D4Diode D5Diode D6Diode D7Diode D8And a switch tube S5And a capacitor C2(ii) a Wherein,
the inductance L2Is connected with one end of the transformer, the inductor L2And the other end of the diode D is respectively connected with the diode D4Anode of, the diode D5The cathode of (a) is connected; the diode D4Respectively with said diode D6The cathode of (1), the switch tube S5The diode D8The anode of (2) is connected; the diode D6With the other end of the secondary winding of the transformer and the diode D, respectively7The cathode of (a) is connected; the diode D8Respectively with said capacitor C2One end of, the external load R0The positive electrode of (1) is connected; the diode D7Anode of (2) and the switching tube S5Source electrode of, the capacitor C2The other end of (2), the external resistance R0Respectively with the diode D6Is connected with the anode of (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711353077.7A CN108075669B (en) | 2017-12-15 | 2017-12-15 | DC-DC converter with integrated cascade structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711353077.7A CN108075669B (en) | 2017-12-15 | 2017-12-15 | DC-DC converter with integrated cascade structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108075669A true CN108075669A (en) | 2018-05-25 |
| CN108075669B CN108075669B (en) | 2020-01-21 |
Family
ID=62158878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711353077.7A Active CN108075669B (en) | 2017-12-15 | 2017-12-15 | DC-DC converter with integrated cascade structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108075669B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752752A (en) * | 2019-10-25 | 2020-02-04 | 中国科学院电工研究所 | High-transformation-ratio DC-DC converter and method suitable for photovoltaic direct-current boosting system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545637A (en) * | 2010-05-28 | 2012-07-04 | 南京航空航天大学 | Buck-boost secondary side regulation three-port direct current converter |
| CN103151932A (en) * | 2013-02-05 | 2013-06-12 | 南京航空航天大学 | Buck / Boost integration type three-port direct current converter and control method thereof |
| CN103944396A (en) * | 2014-04-11 | 2014-07-23 | 燕山大学 | LLC resonance type three-port DC-DC converter and control method thereof |
| US20140347894A1 (en) * | 2013-05-24 | 2014-11-27 | Marvell World Trade Ltd | Current shaping for dimmable led |
| CN106936320A (en) * | 2017-05-11 | 2017-07-07 | 辽宁工程技术大学 | A kind of crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter |
| CN107222100A (en) * | 2017-06-12 | 2017-09-29 | 福州大学 | A kind of integrated Buck Boost and LLC circuits single-stage LED drive circuit |
-
2017
- 2017-12-15 CN CN201711353077.7A patent/CN108075669B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545637A (en) * | 2010-05-28 | 2012-07-04 | 南京航空航天大学 | Buck-boost secondary side regulation three-port direct current converter |
| CN103151932A (en) * | 2013-02-05 | 2013-06-12 | 南京航空航天大学 | Buck / Boost integration type three-port direct current converter and control method thereof |
| US20140347894A1 (en) * | 2013-05-24 | 2014-11-27 | Marvell World Trade Ltd | Current shaping for dimmable led |
| CN103944396A (en) * | 2014-04-11 | 2014-07-23 | 燕山大学 | LLC resonance type three-port DC-DC converter and control method thereof |
| CN106936320A (en) * | 2017-05-11 | 2017-07-07 | 辽宁工程技术大学 | A kind of crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter |
| CN107222100A (en) * | 2017-06-12 | 2017-09-29 | 福州大学 | A kind of integrated Buck Boost and LLC circuits single-stage LED drive circuit |
Non-Patent Citations (2)
| Title |
|---|
| NENG ZHANG ET AL.: "A review of topologies of three-port DC-DC converters for the integration of renewable energy and energy storage system", 《RENEWABLE AND SUSTAINABLE ENERGY REVIEWS 56 (2016) 388-401》 * |
| 石健将等: "一种双管正激磁集成变换器", 《南京航空航天大学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752752A (en) * | 2019-10-25 | 2020-02-04 | 中国科学院电工研究所 | High-transformation-ratio DC-DC converter and method suitable for photovoltaic direct-current boosting system |
| CN110752752B (en) * | 2019-10-25 | 2021-07-13 | 中国科学院电工研究所 | High-transformation-ratio DC-DC converter and method suitable for photovoltaic direct-current boosting system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108075669B (en) | 2020-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Fardoun et al. | Ultra step-up DC–DC converter with reduced switch stress | |
| Gui et al. | A high voltage-gain LLC micro-converter with high efficiency in wide input range for PV applications | |
| Ting et al. | Analysis, design, and implementation of a zero-voltage-transition interleaved boost converter | |
| CN108988634B (en) | Three-phase interleaved bidirectional large-transformation-ratio DCDC converter and control method thereof | |
| CN110581649B (en) | High-gain soft-switching direct-current converter and control method thereof | |
| CN210724563U (en) | T gamma novel boost DC-DC converter topology | |
| CN103066841A (en) | Voltage-multiplying DC converter based on charge pump capacitor | |
| CN103490635B (en) | A kind of modified model H bridge buck-boost DC converter and control method thereof | |
| CN110829837A (en) | Low-voltage stress ZVS high-gain Boost converter | |
| CN110752752B (en) | High-transformation-ratio DC-DC converter and method suitable for photovoltaic direct-current boosting system | |
| Luewisuthichat et al. | Analysis and implement DC-DC integrated boost-flyback converter with LED street light stand-by application | |
| CN108075669B (en) | DC-DC converter with integrated cascade structure | |
| US8937463B2 (en) | Common-core power factor correction resonant converter | |
| Liang et al. | Study and implementation of a high step-up voltage DC-DC converter using coupled-inductor and cascode techniques | |
| CN203522541U (en) | Improved H bridge buck-boost DC converter | |
| CN109149933A (en) | A kind of high-gain DC/DC converter with coupling inductance | |
| CN114123791A (en) | Bridge type high-gain high-efficiency switch capacitor type DC-DC converter | |
| CN114301282A (en) | High-gain DC-DC converter based on coupling inductor | |
| Chen et al. | A isolated bidirectional interleaved flyback converter for battery backup system application | |
| Ting et al. | A new zero-voltage-transition pwm dc-dc boost converter | |
| CN113364294A (en) | Low-voltage stress and low-input current ripple high-gain converter and control method | |
| Davis et al. | Developed non-isolated high step-up converter with low voltage stress | |
| Chub et al. | Sheppard-Taylor isolated high boost DC-DC converter | |
| Amani et al. | A high step-up interleaved LLC resonant converter by using a center-tapped transformer | |
| CN220457296U (en) | High-efficiency boosting DC-DC converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |