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
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- 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
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- transformer
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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
- H02M3/22—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
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 present invention relates to the DC-DC conversion that DC-DC converter technical field more particularly to a kind of band integrate cascade structure
Device.
Background technology
In distributed generation system or battery power supply system, usually require that using high boost DC-DC converter.Example
Such as, in distributed photovoltaic power generation system, the output of solar panel is simultaneously a very low DC voltage, and rear stage
Inverter requirement input voltage it is sufficiently high, to obtain satisfactory ac output voltage, it is therefore desirable to one have it is enough
The boost converter of high voltage gain come realize energy convert.As shown in Figure 1, Fig. 1 is typical photovoltaic generating system energy
Mapped structure figure.It can be seen that high boost DC-DC converter is the key that connection photovoltaic battery panel and inverter dc bus
Part.
High boost DC-DC converter can pass through isolated form and non-isolation type topological realization.In traditional photovoltaic generation system
In system, the high boost DC-DC converter generally use Boost circuit in Fig. 1, circuit structure is simple, and component number is few, control
System processed is easy to implement.However, when the difference of input voltage and output voltage is larger, the transfer efficiency of Boost is relatively low,
And voltage gain is there are an inflection point in traditional Boost circuit, and when duty cycle is more than this inflection point, voltage gain will be in
The characteristic of existing rapid decrease.
In general, not requiring the occasion of electrical isolation, non-isolation type converter has some advantages, because its control system
Simply, and there is no isolating transformers it is hereby achieved that smaller volume.However, it is wanted some to reach safety standard
The realistic occasion for applying electrical isolation, non-isolation type converter can not be met the requirements.
The high boost DC-DC converter of isolated form is largely ground at present due to that can realize big voltage gain and electrical isolation
Study carefully and be widely used in real system.Wherein Minh-Khai Nguyen et al. propose a kind of quasi- switch Boost type
Isolated form topology, which allows there are pass-through state, and reduces the turn ratio of transformer.
However, in the scheme of Minh-Khai Nguyen et al. inventions, since input side inductance value is very big so that input
Resonant frequency between side inductance and input lateral capacitance reduces, and when switching frequency is higher, converter easily generates vibration, and
And influence of the transformer leakage inductance to circuit is not considered.In fact, at the switching moment, the presence of leakage inductance can generate larger
Due to voltage spikes, and output power is bigger, due to voltage spikes is bigger, so as to damage the power component in circuit.
The content of the invention
The present invention provides the DC-DC converter that a kind of band integrates cascade structure, it is intended to by a kind of integrated morphology and small
Transformer turns ratio realizes larger voltage gain, and improves the integrated level and work efficiency of converter.
To achieve the above object, the present invention provides the DC-DC converter that a kind of band integrates cascade structure, and the band integrates grade
It is coupled in the DC-DC converter of structure and is integrated with Boost circuit, Buck-Boost circuits and transformer, wherein, the Boost
The input terminal of circuit and extraneous DC power supply VinConnection, the primary coil of the output terminal of the Boost circuit and the transformer
Connection, the secondary coil of the transformer are connected with the input terminal of the Buck-Boost circuits, the Buck-Boost circuits
Output terminal and extraneous load R0Connection.
The further technical solution of the present invention is that the Boost circuit includes capacitance C1, inductance L1, diode D1, two
Pole pipe D2, diode D3, switching tube S1, switching tube S2, switching tube S3And switching tube S4；Wherein,
The inductance L1Input terminal and extraneous DC power supply VinAnode connection, the inductance L1Output terminal respectively with
The diode D1Positive grade, diode D2Positive grade, diode D3Positive grade connection；The diode D1Cathode respectively with
The capacitance C1One end, the switching tube S1Drain, switching tube S3Drain connection；The switching tube S1Source level difference
With the diode D2Cathode, the switching tube S2Drain, the transformer primary coil one end connection；It is described to open
Close pipe S3Source level respectively with the diode D3Cathode, the switching tube S4Drain, the primary coil of the transformer
The other end connects；The capacitance C1The other end, the switching tube S2Source level, the switching tube S4Source level respectively with it is described
Extraneous DC power supply VinCathode connection.
The further technical solution of the present invention is that the Buck-Boost circuits include inductance L2, diode D4, two poles
Pipe D5, diode D6, diode D7, diode D8And switching tube S5And capacitance C2；Wherein,
The inductance L2One end be connected with one end of the transformer, the inductance L2The other end respectively with described two
Pole pipe D4Anode, the diode D5Cathode connection；The diode D4Cathode respectively with the diode D6The moon
Pole, the switching tube S5Drain electrode, the diode D8Anode connection；The diode D6Anode respectively with the transformation
The other end of the secondary coil of device, the diode D7Cathode connection；The diode D8Cathode respectively with the capacitance C2
One end, the extraneous load R0Anode connection；The diode D7Anode, the switching tube S5Source electrode, the capacitance
C2The other end, the extraneous resistance R0Cathode respectively with the diode D6Anode connection.
The beneficial effects of the invention are as follows：The present invention in the band through the above technical solutions, integrate the DC-DC of cascade structure
Boost circuit, Buck-Boost circuits and transformer are integrated in converter, wherein, the input terminal of the Boost circuit with
Extraneous DC power supply VinConnection, the output terminal of the Boost circuit are connected with the primary coil of the transformer, the transformer
Secondary coil be connected with the input terminal of the Buck-Boost circuits, the output terminal of the Buck-Boost circuits is born with the external world
Carry R0Connection, 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 of the drawings
Fig. 1 is existing photovoltaic generating system energy conversion structure chart；
Fig. 2 is the structure diagram for the DC-DC converter first embodiment that band proposed by the present invention integrates cascade structure；
Fig. 3 is the circuit structure signal for the DC-DC converter second embodiment that band proposed by the present invention integrates cascade structure
Figure；
Fig. 4 is oscillogram of the inductance L2 operations in DCM；
Fig. 5 (a) is the equivalent circuit diagram for the DC-DC converter second embodiment that band proposed by the present invention integrates cascade structure
In the first level structure schematic diagram；
Fig. 5 (b) is the equivalent circuit diagram for the DC-DC converter second embodiment that band proposed by the present invention integrates cascade structure
In the second level structure schematic diagram；
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Specifically, it refer to Fig. 2, Fig. 2 is that band proposed by the present invention integrates the DC-DC converter first of cascade structure and implements
The structure diagram of example.
As shown in Fig. 2, the present embodiment propose band integrate cascade structure DC-DC converter be integrated with Boost circuit,
Buck-Boost circuits and transformer, wherein, the input terminal of the Boost circuit and extraneous DC power supply VinConnection, it is described
The output terminal of Boost circuit is connected with the primary coil of the transformer, the secondary coil of the transformer and the Buck-
The input terminal connection of Boost circuit, the output terminal of the Buck-Boost circuits and extraneous load R0Connection.
The present embodiment integrates Boost through the above technical solutions, being integrated in the band in the DC-DC converter of cascade structure
Circuit, Buck-Boost circuits and transformer, realize larger voltage gain, improve integrated level and the change of converter
The work efficiency of depressor.
Further, Fig. 3 is refer to, Fig. 3 is that band proposed by the present invention integrates the DC-DC converter second of cascade structure in fact
Apply the electrical block diagram of example.
Specifically, in the present embodiment, the Boost circuit includes capacitance C1, inductance L1, diode D1, diode D2, two
Pole pipe D3, switching tube S1, switching tube S2, switching tube S3And switching tube S4.Wherein, the inductance L1Input terminal and the external world it is straight
Galvanic electricity source VinAnode connection, the inductance L1Output terminal respectively with the diode D1Positive grade, diode D2Positive grade,
Diode D3Positive grade connection；The diode D1Cathode respectively with the capacitance C1One end, the switching tube S1Leakage
Grade, switching tube S3Drain connection；The switching tube S1Source level respectively with the diode D2Cathode, the switching tube S2
Drain, the transformer primary coil one end connection；The switching tube S3Source level respectively with the diode D3The moon
Pole, the switching tube S4Drain, the transformer primary coil the other end connection；The capacitance C1The other end, described
Switching tube S2Source level, the switching tube S4Source level respectively with the extraneous DC power supply VinCathode connection.
The Buck-Boost circuits include inductance L2, diode D4, diode D5, diode D6, diode D7, diode
D8And switching tube S5And capacitance C2.Wherein, the inductance L2One end be connected with one end of the transformer, the electricity
Feel L2The other end respectively with the diode D4Anode, the diode D5Cathode connection；The diode D4Cathode
Respectively with the diode D6Cathode, the switching tube S5Drain electrode, the diode D8Anode connection；The diode
D6Anode respectively with the other end of the secondary coil of the transformer, the diode D7Cathode connection；The diode D8
Cathode respectively with the capacitance C2One end, the extraneous load R0Anode connection；The diode D7Anode, described
Switching tube S5Source electrode, the capacitance C2The other end, the extraneous resistance R0Cathode respectively with the diode D6Anode
Connection.
The circuit theory of the present embodiment is elaborated with reference to Fig. 3, Fig. 4, Fig. 5 (a) and Fig. 5 (b)：
The band that the present embodiment proposes integrates the circuit diagram of the DC-DC converter of cascade structure as shown in figure 3, wherein, VinFor
Input voltage, and VoFor output voltage.N is transformer TrThe turn ratio.Inductance L2For transformer T in real systemrLeakage inductance with it is outer
The sum of portion's series inductance.
As shown in figure 3, low-pressure side usually connects the output terminal of photovoltaic cell or fuel cell, high-pressure side is female for direct current
Line.Due to the battery attributes of low-pressure side, to obtain a smaller peak point current, therefore inductance L in actual circuit1Usually work
At continuous conduction mode (CCM).And inductance L2Discontinuous conduction mode (DCM) or continuous conduction mode can be then operated in
(CCM).When circuit parameter determines, inductance L2Conduction mode depend on load size.
Process to simplify the analysis, do it is assumed hereinafter that：
1) all switching tubes and diode are considered as ideal component, i.e., the conducting resistance of all switching tubes and all two poles
The forward conduction voltage drop of pipe is accordingly to be regarded as zero；
2) the capacitance C1With capacitance C2Capacitance is sufficiently large, i.e. VC1And VC2It is constant；
3) dead time between the top tube and down tube of same bridge arm is ignored.
Fig. 4 is inductance L2Operate the oscillogram in DCM.Wherein, Ts is switch periods.D is switching tube S2With switching tube S4
Duty cycle in a switch periods.Δ1For period [t1, t2] in a switch periods TsInterior duty cycle.In DCM, one
Converter is divided into 6 stages in a switch periods.
1 [t of stage0-t1]：In t0Moment, switching tube S1, switching tube S4With switching tube S5Conducting.In this stage, input electricity
Press VinPass through circuit D3And S4Give inductance L1It charges.Meanwhile voltage VC1Pass through circuit S1, D4, S5, D7And S4Give inductance L2It charges.
According to the transformer principle of equal effects, inductance L is applied at this time2The voltage at both ends is NVC1.Output voltage VoBy voltage VC2It provides.
2 [t of stage1-t2]：In t1Moment, switching tube S4With switching tube S5Shut-off, switching tube S3Conducting.Inductance L1By returning
Road D1, C1And VinAfterflow.Inductance L1In energy be released to capacitance C1.Inductance L2Pass through circuit S3, S1, D4, D8, VoAnd D7It is continuous
Stream.Inductance L2In energy be released to output voltage Vo。
3 [t of stage2-t3]：In t2Moment, inductance L2Afterflow terminates, inductance L2Electric current fall to zero.In this stage, stream
Cross inductance L2Electric current be zero.Although switching tube S1With switching tube S3Conducting state is still within, but also no electric current flows through.
Meanwhile inductance L1Still it is operated in freewheeling state.Output voltage VoBy voltage VC2It provides.
4 [t of stage3-t4]：In t3Moment, switching tube S1Shut-off, switching tube S2With switching tube S5Conducting.This stage and rank
Section 1 is similar.However, in this stage inductance L2Current direction it is opposite with the stage 1.In this stage, input voltage VinPass through
Circuit D2And S2Give inductance L1It charges.Meanwhile voltage VC1Pass through circuit S3, D6, S5, D5And S2Give inductance L2It charges.It is applied to inductance
L2The voltage at both ends is NVC1.Output voltage VoBy voltage VC2It provides.
5 [t of stage4-t5]：In t4Moment, switching tube S2With switching tube S5Shut-off, switching tube S1Conducting.This stage and rank
Section 2 is similar.In this stage, inductance L1Pass through circuit D1, C1And VinAfterflow.Inductance L1In energy be released to capacitance C1.Electricity
Feel L2Pass through circuit S1, S3, D6, D8, VoAnd D5Afterflow.Inductance L2In energy be released to output voltage Vo。
6 [t of stage5-t6]：In t5Moment, inductance L2Afterflow terminates, inductance L2Electric current fall to zero.This stage and rank
Section 3 is similar.In this stage, inductance L is flowed through2Electric current be zero.Output voltage VoBy voltage VC2It provides.
It should be noted that according to operating principle, the band that the present embodiment proposes integrates the DC-DC converter quilt of cascade structure
It is integrated into a non-isolation type converter and an isolated converter.The converter that the band integrates cascade structure can be equivalent to
Two-stage circuit structure.Wherein, in the first level structure, energy is from input voltage VinIt is transferred to capacitance C1In；In the second level structure, energy
It measures from capacitance C1It is transferred to outlet side.The band that the present embodiment proposes integrates the equivalent circuit diagram of the DC-DC converter of cascade structure
As shown in Fig. 5 (a) and Fig. 5 (b).
It is a Boost in Fig. 5 (a), is an One Buck-Boost converter body in Fig. 5 (b).In Fig. 5 (b),
NVC1It is by VC1By being obtained after transformer equivalent transformation.
Wherein, the Boost shown in Fig. 5 (a) includes inductance L1, diode D1, switching tube S2Or S4, capacitance C1、
And resistance R1；The inductance L1One end and power supply VinAnode connection, the inductance L1The other end respectively with two pole
Pipe D1Anode, the switching tube S2Or S4Drain connection, the diode D1Cathode respectively with the capacitance C1One
End, the resistance R1One end connection, the power supply VinCathode respectively with the switching tube S2Or S4Source level, the electricity
Hold C1The other end, the resistance R1The other end connection.
One Buck-Boost converter body shown in Fig. 5 (b) includes switching tube S2Or S4, inductance L2, diode D8, diode
DS1Or DS3, switching tube S5, capacitance C2, resistance R0.It should be noted that in above-mentioned Fig. 3, the switching tube S1Source level and
The diode D is connected between drainS1, the diode DS1Anode and the switching tube S1Source level connection, described two
Pole pipe DS1Cathode and the switching tube S1Drain connection；The switching tube S2Source level and drain between be connected with described two
Pole pipe DS2, the diode DS2Anode and the switching tube S2Source level connection, the diode DS2Cathode and described open
Close pipe S2Drain connection.
In Fig. 5 (b), the switching tube S2Or S4Drain and the power supply NVC1Anode connection, the switching tube S2
Or S4Source level respectively with the inductance L2One end, the diode DS1Or DS3Cathode connection, the inductance L2's
The other end respectively with the switching tube S5Drain, the diode D8Anode connection, the diode D8Cathode respectively with
The capacitance C2One end, the resistance R0One end connection, the power supply NVC1Cathode respectively with the diode DS1Or
DS3Positive grade, the switching tube S5Source level, the capacitance C2The other end, the resistance R0The other end connection.
In DCM, the operation waveform of converter is as shown in Figure 4.Ts is switch periods, switching frequencyMore than
Analysis, in positive half periodAnd negative half-cycleThe operating principle of converter is identical.Therefore it may only be necessary to becoming
Circuit state of the parallel operation in half period is derived and analyzed.
According to Fig. 4, Fig. 5 (a) and Fig. 5 (b), in time interval [t0,t3] in, respectively to inductance L1With inductance L2Using
Voltage-second balance principle, has
Abbreviation formula (1), has
In addition, according to the operation waveform of Fig. 4, electric current iCIn time interval [t0, t3] in average value be equal to the flat of outlet side
Equal current value Io, then have
Simultaneous (2) and (3), the expression formula that output power can be obtained are
In conclusion band proposed by the present invention, which integrates, integrates Boost circuit, Buck- in the DC-DC converter of cascade structure
Boost circuit and transformer, wherein, the input terminal of the Boost circuit and extraneous DC power supply VinConnection, the Boost
The output terminal of circuit is connected with the primary coil of the transformer, the secondary coil of the transformer and Buck-Boost electricity
The input terminal connection on road, the output terminal of the Buck-Boost circuits and extraneous load R0Connection compared with the prior art, is realized
Larger voltage gain, improves the integrated level of converter and the work efficiency of transformer, and reduces the voltage of switching tube
Stress.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every utilization
Equivalent structure or the flow conversion that description of the invention and accompanying drawing content are made, are directly or indirectly used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (3)
1. a kind of band integrates the DC-DC converter of cascade structure, which is characterized in that the DC-DC that the band integrates cascade structure becomes
Boost circuit, Buck-Boost circuits and transformer are integrated in parallel operation, wherein, the input terminal of the Boost circuit with
Extraneous DC power supply VinConnection, the output terminal of the Boost circuit are connected with the primary coil of the transformer, the transformer
Secondary coil be connected with the input terminal of the Buck-Boost circuits, the output terminal of the Buck-Boost circuits is born with the external world
Carry R0Connection.
2. band according to claim 1 integrates the DC-DC converter of cascade structure, which is characterized in that the Boost circuit
Including capacitance C1, inductance L1, diode D1, diode D2, diode D3, switching tube S1, switching tube S2, switching tube S3And switch
Pipe S4；Wherein,
The inductance L1Input terminal and extraneous DC power supply VinAnode connection, the inductance L1Output terminal respectively with it is described
Diode D1Positive grade, diode D2Positive grade, diode D3Positive grade connection；The diode D1Cathode respectively with it is described
Capacitance C1One end, the switching tube S1Drain, switching tube S3Drain connection；The switching tube S1Source level respectively with institute
State diode D2Cathode, the switching tube S2Drain, the transformer primary coil one end connection；The switching tube
S3Source level respectively with the diode D3Cathode, the switching tube S4Drain, the transformer primary coil it is another
End connection；The capacitance C1The other end, the switching tube S2Source level, the switching tube S4Source level respectively with the external world
DC power supply VinCathode connection.
3. band according to claim 2 integrates the DC-DC converter of cascade structure, which is characterized in that the Buck-
Boost circuit includes inductance L2, diode D4, diode D5, diode D6, diode D7, diode D8And switching tube S5、
And capacitance C2；Wherein,
The inductance L2One end be connected with one end of the transformer, the inductance L2The other end respectively with the diode
D4Anode, the diode D5Cathode connection；The diode D4Cathode respectively with the diode D6Cathode, institute
State switching tube S5Drain electrode, the diode D8Anode connection；The diode D6Anode respectively with the transformer time
The other end, the diode D of grade coil7Cathode connection；The diode D8Cathode respectively with the capacitance C2One
End, the extraneous load R0Anode connection；The diode D7Anode, the switching tube S5Source electrode, the capacitance C2's
The other end, the extraneous resistance R0Cathode respectively with the diode D6Anode connection.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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