CN206211838U - A kind of quasi- Z sources DC DC converters of coupling inductance type - Google Patents
A kind of quasi- Z sources DC DC converters of coupling inductance type Download PDFInfo
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- CN206211838U CN206211838U CN201620102203.6U CN201620102203U CN206211838U CN 206211838 U CN206211838 U CN 206211838U CN 201620102203 U CN201620102203 U CN 201620102203U CN 206211838 U CN206211838 U CN 206211838U
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- diode
- electric capacity
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Abstract
The utility model provides a kind of quasi- Z sources DC DC converters of coupling inductance type, including direct-current input power supplying, the first inductance(L 1), the first diode(D 1), the first electric capacity(C 1), the second electric capacity(C 2), the turn ratio be 1:nTransformer(T), switching tube(S), the second diode(D 2), output capacitance(C out )And load.The utility model is compared to anti exciting converter, quasi- Z source converters etc. with voltage gain higher, it is adaptable to the occasion of non-isolation type high-gain DC voltage transformation.
Description
Technical field
The present invention relates to DC/DC converters field, and in particular to a kind of quasi- Z sources DC-DC converter of coupling inductance type.
Background technology
In recent years, photovoltaic power generation technology has obtained unprecedented development, its main Land use systems for also turning into solar energy
One of.Parallel network power generation technology is to alleviating energy crisis, environmental protection and ensures that sustainable economic development are significant.
Generally, the output voltage of photovoltaic array battery is relatively low, it is necessary to could meet wanting for combining inverter by DC/DC converter boosts
Ask, therefore require that DC/DC converters possess gain and efficiency higher.But many boosting DC/DC converters are subject to dutycycle, parasitism
Parameter and the limitation of loss, it is impossible to which realization is significantly boosted, such as anti exciting converter, its voltage gain are nD/ (1-D), and n is to become
The depressor turn ratio, D is dutycycle, but due to the influence of parasitic parameter, its gain is restricted;And for example quasi- Z source converters, its voltage
Gain is 1/ (1-2D), is improved compared with Boost, but still be difficult to meet the demand of practical application.
The content of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, propose that a kind of quasi- Z sources DC-DC of coupling inductance type becomes
Parallel operation.
Direct-current input power supplying, the first inductance, the first diode, the first electric capacity, the second electricity are specifically included in circuit of the present invention
Hold, the turn ratio is 1:The transformer of n, switching tube, the second diode, output capacitance and load.
The specific connected mode of circuit of the present invention is:One end of the positive pole of described direct-current input power supplying and the first inductance connects
Connect.The other end of the first described inductance is connected with the anode of one end of the second electric capacity and the first diode.Described first
The negative electrode of diode is connected with one end of the first electric capacity and the Same Name of Ends of transformer primary side.The other end of the second described electric capacity
It is connected with the different name end of transformer secondary.The different name end of described transformer primary side and Same Name of Ends, the switching tube of transformer secondary
Drain electrode and the second diode anode connect.The described negative electrode of the second diode and one end of output capacitance and load one
End connection.Described output capacitance is in parallel with load.The other end of the negative pole of described direct-current input power supplying and the first electric capacity,
The other end connection of the source electrode of switching tube, the other end of output capacitance and load.
Compared with prior art, circuit of the present invention have the advantage that for:Compared to traditional anti exciting converter (its output electricity
Press and be) and quasi- Z source converters (its output voltage is) etc. DC/DC converters, in phase
In the case of same dutycycle and input voltage, with output voltage higher, output voltage is
Under the conditions of identical input voltage and output voltage, circuit of the present invention only needs to less dutycycle just can be by inferior grade electricity
Pressure rises to high-grade voltage, and input and output altogether, continuous input current etc., therefore circuit of the present invention is with very extensive
Application prospect.
Brief description of the drawings
Fig. 1 is a kind of quasi- Z sources DC-DC converter structure chart of coupling inductance type.
Fig. 2 is a voltage and current waveform for switch periods main element.
Fig. 3 a, Fig. 3 b are different phase circuit modal graph in a switch periods.
Fig. 4 is the gain V of circuit of the invention, anti exciting converter and quasi- Z source converters in exampleout/VinWith dutycycle D
The oscillogram of change.
Specific embodiment
With reference to embodiments and accompanying drawing the present invention is described in further detail explanation, but embodiments of the present invention
Not limited to this.If being that those skilled in the art can join it is noted that having the process or parameter of not special detailed description below
Understand according to prior art or realize.
Basic Topological of the invention and each main element voltage x current reference direction are as shown in Figure 1.For authentication
Just, the device in circuit structure is accordingly to be regarded as ideal component.The drive signal v of switching tube SGS, the first diode D1Electric current iD1, second
Diode D2Electric current iD2, the first inductance L1Electric current iL1, transformer T magnetizing inductance LmElectric current iLm, the first electric capacity C1Voltage VC1,
Two electric capacity C2Voltage VC2Oscillogram it is as shown in Figure 2.
(1) in t0~t1Stage, converter this stage modal graph as shown in Figure 3 a, the drive signal v of switching tube SGS
It is changed into high level, switching tube S conductings, the first diode D from low level1With the second diode D2Bear backward voltage cut-off.Direct current
Input power VinWith the second electric capacity C2By the first diode D1The first inductance L is given simultaneously with switching tube S1Charge, the first electric capacity C1
By switching tube S to transformer T magnetizing inductance LmCharge.Additionally, output capacitance CoutPowering load.
(2) in t1~t2Stage, converter this stage modal graph as shown in Figure 3 b, the drive signal v of switching tube SGS
It is changed into low level, switching tube S shut-offs, the first diode D from high level1With the second diode D2Bear forward voltage conducting.Direct current
Input power VinWith the first inductance L1By the first diode D1The first electric capacity C is given simultaneously1Charge, direct-current input power supplying VinWith
One inductance L1By the second diode D2The second electric capacity C is given simultaneously2, output capacitance CoutCharged with load, the excitation electricity of transformer T
Sense LmBy the first diode D1To the second electric capacity C2Charge, the magnetizing inductance L of transformer TmBy the second diode D2To first
Electric capacity C1, output capacitance CoutCharged with load.Additionally, direct-current input power supplying Vin, the first inductance L1With the excitation electricity of transformer T
Sense LmBy the first diode D1With the second diode D2Output capacitance C is given simultaneouslyoutCharged with load.
The steady-state gain of circuit of the present invention derives as follows.
By the first inductance L1With the magnetizing inductance L of transformer TmAverage value of the voltage in a switch periods be zero, can
Obtain following relationship.
(Vin+VC2+nVC1)ton+(Vin-VC1)toff=0 (1)
Again when switching tube S is turned off, output voltage VoutMeet following relationship.
Simultaneous solution formula (1), (2), (3) can obtain output voltage VoutWith DC input voitage VinRelation.
Traditional anti exciting converter is respectively nD/ (1-D) and 1/ (1-2D) with the steady-state gain of quasi- Z source converters, and (D is duty
Than n is transformer turns ratio), as turn ratio n=3, the present invention carries circuit and increases with the stable state of anti exciting converter, quasi- Z source converters
Benefit compares figure as shown in figure 4, as can be seen from Figure 4, and when input voltage is 10V, circuit proposed by the present invention only needs the dutycycle to be
0.18 can just rise to 100V or so, and other two converter then needs larger dutycycle.
Claims (1)
1. the quasi- Z sources DC-DC converter of a kind of coupling inductance type, it is characterised in that including direct-current input power supplying, the first inductance(L 1)、
First diode(D 1), the first electric capacity(C 1), the second electric capacity(C 2), the turn ratio be 1:nTransformer(T), switching tube(S)、
Second diode(D 2), output capacitance(C out )And load;
The positive pole of the direct-current input power supplying and the first inductance(L 1)One end connection;First inductance(L 1)Other end
With the second electric capacity(C 2)One end and the first diode(D 1)Anode connection;First diode(D 1)Negative electrode and
One electric capacity(C 1)One end and transformer(T)The Same Name of Ends connection of primary side;Second electric capacity(C 2)Other end with become
Depressor(T)The different name end connection of secondary;The transformer(T)The different name end of primary side and transformer(T)The Same Name of Ends of secondary,
Switching tube(S)Drain electrode and the second diode(D 2)Anode connection;Second diode(D 2)Negative electrode with output electricity
Hold(C out )One end and load one end connection;The output capacitance(C out )It is in parallel with load;The direct-current input power supplying
Negative pole and the first electric capacity(C 1)Other end, switching tube(S)Source electrode, output capacitance(C out )Other end and load
Other end connection.
Priority Applications (1)
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CN201620102203.6U CN206211838U (en) | 2016-01-31 | 2016-01-31 | A kind of quasi- Z sources DC DC converters of coupling inductance type |
Applications Claiming Priority (1)
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CN201620102203.6U CN206211838U (en) | 2016-01-31 | 2016-01-31 | A kind of quasi- Z sources DC DC converters of coupling inductance type |
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CN206211838U true CN206211838U (en) | 2017-05-31 |
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CN201620102203.6U Expired - Fee Related CN206211838U (en) | 2016-01-31 | 2016-01-31 | A kind of quasi- Z sources DC DC converters of coupling inductance type |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105763045A (en) * | 2016-01-31 | 2016-07-13 | 华南理工大学 | Coupled inductor quasi-Z-source DC-DC converter |
CN110856309A (en) * | 2019-11-22 | 2020-02-28 | 安徽乐图电子科技有限公司 | Multi-path LED driving circuit |
-
2016
- 2016-01-31 CN CN201620102203.6U patent/CN206211838U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105763045A (en) * | 2016-01-31 | 2016-07-13 | 华南理工大学 | Coupled inductor quasi-Z-source DC-DC converter |
CN110856309A (en) * | 2019-11-22 | 2020-02-28 | 安徽乐图电子科技有限公司 | Multi-path LED driving circuit |
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GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20220131 |
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CF01 | Termination of patent right due to non-payment of annual fee |