CN109039063A - A kind of quasi- source Z boost chopper of stacked - Google Patents
A kind of quasi- source Z boost chopper of stacked Download PDFInfo
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- CN109039063A CN109039063A CN201810706439.4A CN201810706439A CN109039063A CN 109039063 A CN109039063 A CN 109039063A CN 201810706439 A CN201810706439 A CN 201810706439A CN 109039063 A CN109039063 A CN 109039063A
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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
- H02M3/02—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
Abstract
The present invention provides a kind of quasi- source Z boost chopper of stacked, including direct-current input power supplyingV in , the first inductance (L 1), the second inductance (L 2), third inductance (L 3), the 4th inductance (L 4), first capacitor (C 1), the second capacitor (C 2), third capacitor (C 3), the 4th capacitor (C 4), the 5th capacitor (C 5), the 6th capacitor (C 6), first diode (D 1), the second diode (D 2), third diode (D 3), the 4th diode (D 4), switching tube (S), output capacitance (C out ) and load.The present invention compared to voltage gain with higher and lower capacitors, switch and diode voltage stress such as Boost, the quasi- Z source converters of tradition and input and output altogether, the occasion suitable for non-isolation type high-gain DC voltage transformation.
Description
Technical field
The present invention relates to DC/DC converter fields, and in particular to a kind of quasi- source Z boost chopper of stacked.
Background technique
In the renewable energy systems such as photovoltaic and fuel cell, the DC/DC converter of high voltage gain is needed
Obtain higher DC voltage.However, since switched parasitic parameter and voltage endurance capability limit traditional DC/DC booster converter
Voltage gain and output voltage amplitude.If voltage gain is the Boost circuit of 1/ (1-D) (D is duty ratio), when duty ratio connects
Higher voltage gain can just be obtained by being bordering on 1, but switched parasitic parameter limits duty cycle adjustment range；Simultaneously because secondly
The voltage stress of pole pipe and switch is equal with output voltage, and the amplitude of output voltage is limited by the voltage endurance capability of diode and switch
System.The emerging source Z or the quasi- source Z DC/DC converter in recent years, voltage gain are higher than boost circuit, if voltage gain is (2-
The high-gain Z source converter and voltage gain on the total ground of 2D)/(1-2D) (D is duty ratio) are 1/ (1-4D) (D is duty ratio)
The source Hybrid Z DC/DC converter.But the voltage stress of the DC/DC converter switches in the above source Z and the quasi- source Z is not apparent from
It reduces, therefore output voltage amplitude is still restricted.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, the quasi- source the Z boost chopper of stacked is proposed.
Direct-current input power supplying V is specifically included in circuit of the present inventionin, the first inductance, the second inductance, third inductance, the 4th electricity
Sense, first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, first diode, the two or two pole
Pipe, third diode, the 4th diode, switching tube, output capacitance and load.
The specific connection type of circuit of the present invention are as follows: direct-current input power supplying VinAnode, the anode of first diode, the first electricity
One end of appearance connects；Direct-current input power supplying VinCathode, one end of the first inductance, the cathode of load and output capacitance one end connect
It connects；The other end of first inductance, one end of the second capacitor are connected with the source electrode of switching tube；The other end of first capacitor, the two or two
The anode of pole pipe, the second inductance one end connected with one end of third capacitor；The yin of the other end of second capacitor, first diode
One end of pole, the other end of the second inductance and the 4th capacitor connects；The other end of third capacitor, the anode of third diode,
One end of three inductance is connected with one end of the 5th capacitor；The other end of 4th capacitor, the cathode of the second diode, third inductance
The connection of one end of the other end and the 6th capacitor；The other end of 5th capacitor, one end of the 4th inductance are connected with the drain electrode of switching tube；
The anode connection of the other end of 6th capacitor, the cathode of third diode, the other end of the 4th inductance and the 4th diode；4th
The cathode of diode, the other end of output capacitance and the connection of the anode of load.
Compared with prior art, circuit of the present invention has the advantage that are as follows: on voltage gain, compared to traditional Boost
Converter (its voltage gain is M=1/ (1-D)), altogether high-gain Z source converter (its voltage gain be M=(2-2D)/
(1-2D)) and the DC/DC converter such as Hybrid Z source converter (its voltage gain be M=1/ (1-4D)), there is higher electricity
Gain is pressed, voltage gain is M=(2-2D)/(1-4D)；On switching voltage stress, compared to traditional Boost
(its switching voltage stress is Vs=Vout), (its switching voltage stress is V for high-gain Z source converter altogethers=Vout-Vin) and
(its switching voltage stress is V to Hybrid Z source converters=Vout) etc. DC/DC converter, have smaller switching voltage answer
Power, voltage stress Vs=(2Vout-Vin)/3.When input voltage is identical with output voltage, the switch of circuit of the present invention is accounted for
Empty smaller and switch stress is smaller, and input and output are altogether, therefore circuit of the present invention has very broad application prospect.
Detailed description of the invention
Fig. 1 is a kind of quasi- source the Z boost chopper structure chart of stacked.
Fig. 2 is the voltage and current waveform of a switch periods T main element.
Fig. 3 a~3b is circuit modal graph in a switch periods.
Fig. 4 is circuit, Boost, high-gain Z source converter altogether and the Hybrid Z source converter proposed
The relational graph of voltage gain and duty ratio D.
Fig. 5 is circuit, Boost, high-gain Z source converter altogether and the Hybrid Z source converter proposed
The ratio V of switching voltage stress and input voltages/VinWith the relational graph of voltage gain.
Specific embodiment
Specific embodiments of the present invention are specifically described below in conjunction with attached drawing, but implementation of the invention is not limited to
This, if it need to be pointed out that having the not special symbol or process of detailed description below, it is existing to be that those skilled in the art can refer to
What technology was realized.
This example Basic Topological and each main element voltage and current reference direction are as shown in Figure 1.
A kind of quasi- source Z boost chopper of stacked comprising direct-current input power supplying Vin, the first inductance L1, the second inductance
L2, third inductance L3, the 4th inductance L4, first capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5、
6th capacitor C6, first diode D1, the second diode D2, third diode D3, the 4th diode D4, switching tube S, output capacitance
CoutAnd load.The direct-current input power supplying VinAnode, first diode D1Anode, first capacitor C1One end connection；Institute
The direct-current input power supplying V statedinCathode, the first inductance L1One end, load cathode and output capacitance CoutOne end connection；Institute
The the first inductance L stated1The other end, the second capacitor C2One end connected with the source electrode of switching tube S；The first capacitor C1's
The other end, the second diode D2Anode, the second inductance L2One end and third capacitor C3One end connection；Second electricity
Hold C2The other end, first diode D1Cathode, the second inductance L2The other end and the 4th capacitor C4One end connection；It is described
Third capacitor C3The other end, third diode D3Anode, third inductance L3One end and the 5th capacitor C5One end connect
It connects；The 4th capacitor C4The other end, the second diode D2Cathode, third inductance L3The other end and the 6th capacitor C6
One end connection；The 5th capacitor C5The other end, the 4th inductance L4One end connected with the drain electrode of switching tube S；Described
6th capacitor C6The other end, third diode D3Cathode, the 4th inductance L4The other end and the 4th diode D4Anode connect
It connects；The 4th diode D4Cathode, output capacitance CoutThe other end and load anode connection.
For easy analysis, the device in circuit structure is accordingly to be regarded as ideal component.The driving signal V of switching tube SGS, first
Diode D1Electric current iD1, the second diode D2Electric current iD2, third diode D3Electric current iD3, the 4th diode D4Electric current iD4, first
Inductance L1Electric current iL1, the second inductance L2Electric current iL2, third inductance L3Electric current iL3, the 4th inductance L4Electric current iL4, first capacitor C1Electricity
Press VC1, the second capacitor C2Voltage VC2, third capacitor C3Voltage VC3, the 4th capacitor C4Voltage VC4, the 5th capacitor C5Voltage VC5,
Six capacitor C6Voltage VC6, output capacitance CoutVoltage VCoWith output voltage VoutWaveform diagram as shown in Fig. 2, being described as follows.
In t0~t1In the stage, converter is as shown in Figure 3a in the modal graph in this stage, the driving signal V of switching tube SGSFor height
Level, switching tube S conducting, first diode D1, the second diode D2With third diode D3It bears backward voltage to end, the 4th
Diode D4Bear forward voltage conducting.Direct-current input power supplying Vin, first capacitor C1, third capacitor C3With the 5th capacitor C5Pass through
Switching tube S is to the first inductance L1Charging, the second capacitor C2, third capacitor C3With the 5th capacitor C5By switching tube S to the second inductance
L2Charging, the second capacitor C2, the 4th capacitor C4With the 5th capacitor C5By switching tube S to third inductance L3Charging, the second capacitor C2、
4th capacitor C4With the 6th capacitor C6By switching tube S to the 4th inductance L4Charging, direct-current input power supplying Vin, first capacitor C1,
Two capacitor C2, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5With the 6th capacitor C6Pass through switching tube S and the 4th diode D4
To output capacitance CoutIt charges and powers to the load.
In t1~t2In the stage, converter is as shown in Figure 3b in the modal graph in this stage, the driving signal V of switching tube SGSIt is low
Level, switching tube S shutdown, first diode D1, the second diode D2With third diode D3It bears forward voltage to be connected, the 4th
Diode D4Bear backward voltage cut-off.Direct-current input power supplying VinWith the first inductance L1Pass through first diode D1To the second capacitor
C2Charging, the second inductance L2Pass through first diode D1Give first capacitor C1Charging, the second inductance L2Pass through the second diode D2It gives
4th capacitor C4Charging, third inductance L3Pass through the second diode D2Give third capacitor C3Charging, third inductance L3Pass through the three or two
Pole pipe D3To the 6th capacitor C6Charging, the 4th inductance L4Pass through third diode D3To the 5th capacitor C5Charging, output capacitance CoutTo
Load supplying.
The voltage gain of circuit of the present invention calculates:
By the first inductance L1, the second inductance L2, third inductance L3With the 4th inductance L4Voltage in a switch periods
Average value is zero, and following relationship can be obtained.
(Vin+VC1+VC3+VC5)ton+(Vin-VC2)toff=0 (1)
(VC2+VC3+VC5)ton-VC1toff=0 (2)
(VC2+VC3+VC5)ton-VC4toff=0 (3)
(VC2+VC4+VC5)ton-VC3toff=0 (4)
(VC2+VC4+VC5)ton-VC6toff=0 (5)
(VC2+VC4+VC6)ton-VC5toff=0 (6)
Voutton+(Vin-VC2-VC5)toff=0 (7)
Output voltage V can be obtained in simultaneous solution formula (1), (2), (3), (4), (5), (6), (7)outWith DC input voitage
VinWith the relationship of duty cycle of switching D.
The voltage gain of traditional Boost is 1/ (1-D) (D is duty ratio), high-gain Z source converter altogether
Voltage gain is (2-2D)/(1-2D) (D is duty ratio), and the voltage gain of the source Hybrid Z DC/DC converter is 1/ (1-4D)
(D is duty ratio), the mentioned circuit of the present invention and Boost, high-gain Z source converter altogether and Hybrid Z source DC/
The steady-state gain of DC converter compares figure as shown in figure 4, as can be seen from Figure 4, under the same conditions, the voltage gain of this circuit is most
It is high.
The switch tube voltage stress of circuit of the present invention.
When switching tube S is turned off, switch tube voltage stress VSFor
VS=VC1+VC2+VC3+VC5 (9)
Simultaneous solution formula (1), (2), (3), (4), (5), (6), (7), (8), (9) available switching tube S voltage stress
For
The switch tube voltage stress of traditional Boost is Vs=Vout, the switch of high-gain Z source converter altogether
Tube voltage stress is Vs=Vout-Vin, the switch tube voltage stress of the source Hybrid Z DC/DC converter is Vs=Vout, the present invention
Mentioned circuit and the switching tube of Boost, high-gain Z source converter altogether and the source Hybrid Z DC/DC converter electricity
Compression compares figure as shown in figure 5, as can be seen from Figure 5, under the same conditions, the switch tube voltage stress of this circuit is minimum.
Claims (4)
1. a kind of quasi- source Z boost chopper of stacked, it is characterised in that including direct-current input power supplyingV in , the first inductance (L 1),
Second inductance (L 2), third inductance (L 3), the 4th inductance (L 4), first capacitor (C 1), the second capacitor (C 2), third capacitor (C 3),
4th capacitor (C 4), the 5th capacitor (C 5), the 6th capacitor (C 6), first diode (D 1), the second diode (D 2), third diode
(D 3), the 4th diode (D 4), switching tube (S), output capacitance (C out ) and load.
2. the quasi- source the Z boost chopper of a kind of stacked according to claim 1, it is characterised in that:
The direct-current input power supplyingV in Positive, first diode (D 1) anode, first capacitor (C 1) one end connection；
The direct-current input power supplyingV in Cathode, the first inductance (L 1) one end, load cathode and output capacitance (C out ) one
End connection；
First inductance (L 1) the other end, the second capacitor (C 2) one end and switching tube (S) source electrode connection；
The first capacitor (C 1) the other end, the second diode (D 2) anode, the second inductance (L 2 ) one end and third electricity
Hold (C 3) one end connection；
Second capacitor (C 2) the other end, first diode (D 1) cathode, the second inductance (L 2 ) the other end and the 4th
Capacitor (C 4) one end connection；
The third capacitor (C 3) the other end, third diode (D 3) anode, third inductance (L 3 ) one end and the 5th electricity
Hold (C 5) one end connection；
4th capacitor (C 4) the other end, the second diode (D 2) cathode, third inductance (L 3 ) the other end and the 6th
Capacitor (C 6) one end connection；
5th capacitor (C 5) the other end, the 4th inductance (L 4 ) one end and switching tube (S) drain electrode connection；
6th capacitor (C 6) the other end, third diode (D 3) cathode, the 4th inductance (L 4 ) the other end and the 4th
Diode (D 4) anode connection；
4th diode (D 4) cathode, output capacitance (C out ) the other end and load anode connection.
3. the quasi- source the Z boost chopper of a kind of stacked according to claim 1, it is characterised in that: output voltage,DFor duty ratio.
4. the quasi- source the Z boost chopper of a kind of stacked according to claim 3, it is characterised in that: switching tube (S) voltage
Stress is。
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| CN201810706439.4A CN109039063B (en) | 2018-06-30 | 2018-06-30 | Stacked quasi-Z-source boost chopper circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810706439.4A CN109039063B (en) | 2018-06-30 | 2018-06-30 | Stacked quasi-Z-source boost chopper circuit |
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| CN109039063B CN109039063B (en) | 2020-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829840A (en) * | 2019-11-15 | 2020-02-21 | 上海海事大学 | Expandable quasi-Z source boost converter and double-integral sliding mode control method thereof |
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