CN206272486U - A kind of quasi- Z source converters of cascade voltage lift type - Google Patents
A kind of quasi- Z source converters of cascade voltage lift type Download PDFInfo
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- CN206272486U CN206272486U CN201621373398.4U CN201621373398U CN206272486U CN 206272486 U CN206272486 U CN 206272486U CN 201621373398 U CN201621373398 U CN 201621373398U CN 206272486 U CN206272486 U CN 206272486U
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- inductance
- diode
- electric capacity
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- voltage
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Abstract
The utility model provides a kind of quasi- Z source converters of cascade voltage lift type, including direct-current input power supplyingV in , the first inductance（L 1）, the first diode（D 1）, the first electric capacity（C 1）, the second electric capacity（C 2）, the second diode（D 2）, the second inductance（L 2）, the 3rd inductance（L 3）, the 3rd electric capacity（C 3）, the 3rd diode（D 3）, the 4th diode（D 4）, the 4th electric capacity（C 4）, the 4th inductance（L 4）, the 5th diode（D 5）, the 5th inductance（L 5）, switching tube（S）, output capacitance（C out ）And load.The utility model patent is compared to Boost, traditional 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 utility model is related to DC/DC converters field, and in particular to a kind of quasi- Z source converters of cascade voltage lift type.
Background technology
In renewable energy system, such as photovoltaic generation and fuel cell system needs the DC/DC converters to have electricity high
Pressure gain and small input current ripple, are easy to be incorporated to AC network and protect input and output.But traditional DC/DC boosting inverters
Device is limited by dutycycle, heat and loss, it is impossible to which realization is significantly boosted, such as Boost, and its voltage gain is
1/ (1-D), D are dutycycle, voltage gain higher could be obtained when dutycycle is close to 1, but at the same time can run into
The problem stated；Additionally, many DC/DC converters based on Z sources and quasi- Z sources, though boosting, electricity using source of resistance real-time performance
Pressure gain still has the space of lifting, and such as voltage gain of quasi- Z source converters is (1-D)/(1-2D), additionally, there may be not altogether,
The problems such as switching tube stress is larger.
Utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, proposes a kind of quasi- Z of cascade voltage lift type
Source converter.
A kind of quasi- Z source converters of cascade voltage lift type, specifically include direct-current input power supplying, the first inductance, the one or two pole
Pipe, the first electric capacity, the second electric capacity, the second diode, the second inductance, the 3rd inductance, the 3rd electric capacity, the 3rd diode, the four or two
Pole pipe, the 4th electric capacity, the 4th inductance, the 5th diode, the 5th inductance, switching tube, output capacitance and load.
The specific connected mode of the utility model circuit is：Direct-current input power supplying VinPositive pole and the first inductance one end connect
Connect.The other end of the first inductance is connected with the anode of the first diode and one end of the second electric capacity.The negative electrode of the first diode
One end of one end, the anode of the second diode and the second inductance with the first electric capacity is connected.The negative electrode of the second diode and the 4th
One end connection of the anode of diode, one end of the 3rd inductance and the 3rd electric capacity.The other end of the second inductance and the 3rd electric capacity
The anode connection of other end and the 3rd diode.The negative electrode of the 4th diode and one end of the 4th inductance and the one of the 4th electric capacity
End connection.The other end of the 3rd inductance and the moon of the 4th electric capacity other end, the anode of the 5th diode and the 3rd diode
Pole connects.The negative electrode of the 5th diode and the other end of the 4th inductance, the drain electrode of the other end, switching tube of the second electric capacity and
One end connection of the 5th inductance.The other end of the 5th inductance is connected with one end of one end of output capacitance and load.Output electricity
Hold in parallel with load.Direct-current input power supplying VinNegative pole and the other end of the first electric capacity, the source electrode of switching tube, output capacitance
Other end and the connection of the other end of load.
Compared with prior art, the utility model circuit have the advantage that for：Compared to traditional Boost (its
Output voltage is) and quasi- Z source converters (its output voltage is) etc. DC/DC converters,
In the case of identical dutycycle and input voltage, with output voltage higher, output voltage is
Under the conditions of identical input voltage and output voltage, the utility model circuit only needs to less dutycycle just can will be low
Step voltage rises to high-grade voltage, and input and output altogether, input and output electric current it is continuous etc., therefore the utility model circuit
With being widely applied very much prospect.
Brief description of the drawings
Fig. 1 is a kind of quasi- Z source converters structure chart of cascade voltage lift type in example.
Fig. 2 is a voltage and current waveform for switch periods main element in example.
Fig. 3 a, Fig. 3 b are circuit modal graph in a switch periods in example.
Fig. 4 is the gain V of the circuit, Boost and quasi- Z source converters in the utility model exampleo/VinBecome with dutycycle D
The oscillogram of change.
Specific embodiment
For content of the present utility model and feature is expanded on further, below in conjunction with accompanying drawing to specific implementation of the present utility model
Scheme is specifically described, but implementation not limited to this of the present utility model.
As example, the Basic Topological and each main element voltage x current of the quasi- Z source converters of cascade voltage lift type
Reference direction is as shown in Figure 1.For easy analysis, the device in circuit structure is accordingly to be regarded as ideal component.The driving letter of switching tube S
Number VGS, the first diode D1Electric current iD1, the second diode D2Electric current iD2, the 3rd diode D3Electric current iD3, the 4th diode D4Electricity
Stream iD4, the 5th diode D5Electric current iD5, the first inductance L1Electric current iL1, the second inductance L2Electric current iL2, the 3rd inductance L3Electric current iL3,
Four inductance L4Electric current iL4, the 5th inductance L5Electric current iL5, the first electric capacity C1Voltage VC1, the second electric capacity C2Voltage VC2, the 3rd electric capacity C3
Voltage VC3, the 4th electric capacity C4Voltage VC4, the 5th electric capacity C5Voltage VC5Oscillogram it is as shown in Figure 2.
The course of work/the mode of the quasi- Z source converters of this cascade voltage lift type is as follows：
(1) in (t0~t1) stage, converter this stage modal graph as shown in Figure 3 a, the drive signal of switching tube S
VGSIt is changed into high level, switching tube S conductings, the first diode D from low level1Bear backward voltage cut-off, the second diode D2,
Three diode D3, the 4th diode D4With the 5th diode D5Bear forward voltage conducting.Direct-current input power supplying VinWith the second electric capacity
C2The first inductance L is given simultaneously by switching tube S1Charge, the first electric capacity C1The second inductance L is given by switching tube S2, the 3rd inductance L3、
4th inductance L4, the 3rd electric capacity C3With the 4th electric capacity C4Charge.Additionally, the 5th inductance L5Output capacitance C is given by switching tube Sout
Charge and load supplying.
(2) in (t1~t2) stage, converter this stage modal graph as shown in Figure 3 b, the drive signal of switching tube S
VGSIt is changed into low level, switching tube S shut-offs, the first diode D from high level1Bear forward voltage conducting, the second diode D2,
Three diode D3, the 4th diode D4With the 5th diode D5Bear backward voltage cut-off.Direct-current input power supplying VinWith the first inductance
L1By the first diode D1The first electric capacity C is given simultaneously1Charge, the second inductance L2, the 3rd inductance L3, the 4th inductance L4, the 3rd electricity
Hold C3With the 4th electric capacity C4The second electric capacity C is given simultaneously2, the 5th inductance L5Charged with load.
The steady-state gain of the quasi- Z source converters circuit of the utility model cascade voltage lift type derives as follows:
Due to the first inductance L1With the second inductance L2, the 3rd inductance L3, the 4th inductance L4Inductance value it is identical, the first electric capacity C1
With the second electric capacity C2, the 3rd electric capacity C3Capacitance it is identical, then the second inductance L2With the 3rd inductance L3, the 4th inductance L4Voltage,
Electric current is equal, the second electric capacity C2With the 3rd electric capacity C3Voltage, electric current it is equal.
By the first inductance L1With the second inductance L2, the 3rd inductance L3, the 4th inductance L4Voltage in a switch periods
Average value is zero, can obtain following relationship.
(Vin+VC2)ton+(Vin-VC1)toff=0 (1)
-Voutton+(VC1+VC2-Vout)toff=0 (3)
Simultaneous solution formula (1), (2), (3) can obtain output voltage VoutWith DC input voitage VinRelation.
Traditional Boost is respectively 1/ (1-D) and (1-D)/(1-2D) (D with the steady-state gain of Z sources booster converter
It is dutycycle), example carries circuit and compares figure with the steady-state gain of Boost, quasi- Z source converters as shown in figure 4, from figure
4 understand, when input voltage be 10V when, the utility model proposes circuit only need dutycycle for 0.2 can just rise to 120V a left side
The right side, and other two converter then needs larger dutycycle, effect is significant.
Claims (2)
1. quasi- Z source converters of a kind of cascade voltage lift type, it is characterised in that including direct-current input power supplying（V in ）, the first inductance
（L 1）, the first diode（D 1）, the first electric capacity（C 1）, the second electric capacity（C 2）, the second diode（D 2）, the second inductance（L 2）, the 3rd
Inductance（L 3）, the 3rd electric capacity（C 3）, the 3rd diode（D 3）, the 4th diode（D 4）, the 4th electric capacity（C 4）, the 4th inductance（L 4）、
5th diode（D 5）, the 5th inductance（L 5）, switching tube（S）, output capacitance（C out ）And load.
2. quasi- Z source converters of a kind of cascade voltage lift type according to claim 1, it is characterised in that：Described direct current
The positive pole of input power and the first inductance（L 1）One end connection；The first described inductance（L 1）Other end and the one or two pole
Pipe（D 1）Anode and the second electric capacity（C 2）One end connection；The first described diode（D 1）Negative electrode and the first electric capacity（C 1）
One end, the second diode（D 2）Anode and the second inductance（L 2）One end connection；The second described diode（D 2）Negative electrode
With the 4th diode（D 4）Anode, the 3rd inductance（L 3）One end and the 3rd electric capacity（C 3）One end connection；The second described electricity
Sense（L 2）Other end and the 3rd electric capacity（C 3）Other end and the 3rd diode（D 3）Anode connection；Described the four or two
Pole pipe（D 4）Negative electrode and the 4th inductance（L 4）One end and the 4th electric capacity（C 4）One end connection；The 3rd described inductance（L 3）
Other end and the 4th electric capacity（C 4）Other end, the 5th diode（D 5）Anode and the 3rd diode（D 3）Negative electrode connect
Connect；The 5th described diode（D 5）Negative electrode and the 4th inductance（L 4）Other end, the second electric capacity（C 2）Other end,
Switching tube（S）Drain electrode and the 5th inductance（L 5）One end connection；The 5th described inductance（L 5）Other end and output capacitance
（C out ）One end and load one end connection；Described output capacitance（C out ）It is in parallel with load；Described 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)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621373398.4U CN206272486U (en) | 2016-12-14 | 2016-12-14 | A kind of quasi- Z source converters of cascade voltage lift type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621373398.4U CN206272486U (en) | 2016-12-14 | 2016-12-14 | A kind of quasi- Z source converters of cascade voltage lift type |
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| Publication Number | Publication Date |
|---|---|
| CN206272486U true CN206272486U (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621373398.4U Expired - Fee Related CN206272486U (en) | 2016-12-14 | 2016-12-14 | A kind of quasi- Z source converters of cascade voltage lift type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602872A (en) * | 2016-12-14 | 2017-04-26 | 华南理工大学 | Cascaded voltage lifting quasi-Z source converter |
-
2016
- 2016-12-14 CN CN201621373398.4U patent/CN206272486U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602872A (en) * | 2016-12-14 | 2017-04-26 | 华南理工大学 | Cascaded voltage lifting quasi-Z source converter |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170620 Termination date: 20201214 |