CN105450020A - Common-ground high-gain Z source boost converter - Google Patents

Common-ground high-gain Z source boost converter Download PDF

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Publication number
CN105450020A
CN105450020A CN201510224460.7A CN201510224460A CN105450020A CN 105450020 A CN105450020 A CN 105450020A CN 201510224460 A CN201510224460 A CN 201510224460A CN 105450020 A CN105450020 A CN 105450020A
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CN
China
Prior art keywords
diode
electric capacity
inductance
gain
load
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Pending
Application number
CN201510224460.7A
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Chinese (zh)
Inventor
张波
沈瀚云
丘东元
周丽萍
肖文勋
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South China University of Technology SCUT
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South China University of Technology SCUT
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Publication date
Application filed by South China University of Technology SCUT filed Critical South China University of Technology SCUT
Priority to CN201510224460.7A priority Critical patent/CN105450020A/en
Priority to PCT/CN2015/100157 priority patent/WO2016177011A1/en
Publication of CN105450020A publication Critical patent/CN105450020A/en
Pending legal-status Critical Current

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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
    • H02M3/02—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
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention provides a common-ground high-gain Z source boost converter comprising a direct-current input power supply, a first diode, a first inductor, a second inductor, a first capacitor, a second capacitor, a switch tube, a second diode, an output capacitor and a load. One end of the direct-current input power supply is connected with an anode of the first diode. A cathode of the first diode is connected with one end of the first inductor, one end of the first capacitor and an anode of the second diode. The other end of the first inductor is connected with one end of the second capacitor and a drain electrode of the switch tube. The other end of the first capacitor is connected with a source electrode of the switch tube and one end of the second inductor. The second diode is connected with one end of the output capacitor and one end of the load. The other end of the direct-current input power supply is connected with the other end of the second capacitor, the other end of the second inductor, the other end of the output capacitor and the other end of the load. Compared with a Boost converter and a conventional Z source boost converter, the common-ground high-gain Z source boost converter has a relatively high voltage gain.

Description

A kind of high-gain Z source booster converter altogether
Technical field
The present invention relates to DC/DC converter field, be specifically related to a kind of high-gain Z source booster converter altogether.
Background technology
In renewable energy system, most regenerative resource is all low-grade direct voltage as exported in solar energy, wind energy and fuel cell etc., to grid-connected words, need to use the converter of high-gain that low-voltage DC is converted to high voltage direct current, and then electric with grid-connected through the effect output AC of inverter.But traditional DC/DC booster converter is subject to the restriction of duty ratio, heat-dissipating and loss, cannot realize significantly boosting, as Boost, its voltage gain is 1/ (1-D), D is duty ratio, when duty ratio close to 1 time could obtain higher voltage gain, but meanwhile can run into above-mentioned problem; And many Z sources DC/DC converter, though utilize Z source network to achieve boosting, but voltage gain still has the space of lifting, the voltage gain as Z source booster converter is (1-D)/(1-2D), the problem such as to there is not altogether, switching tube stress is larger in addition.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, propose a kind of high-gain Z source booster converter altogether.
Direct-current input power supplying V is specifically comprised in circuit of the present invention in, the first diode, the first inductance, the second inductance, the first electric capacity, the second electric capacity, switching tube, the second diode, output capacitance and load.
The concrete connected mode of circuit of the present invention is: direct-current input power supplying V inone end be connected with the anode of the first diode.The negative electrode of the first diode is connected with one end of one end of the first inductance, the first electric capacity and the anode of the second diode.Other one end of first inductance is connected with one end of the second electric capacity and the drain electrode of switching tube.Other one end of first electric capacity is connected with one end of the source electrode of switching tube and the second inductance.Second diode is connected with one end of output capacitance and one end of load.Output capacitance is in parallel with load.Direct-current input power supplying V inother one end of other one end and the second electric capacity, other one end of the second inductance, other one end of output capacitance and load other one end be connected.
Compared with prior art, the advantage that circuit of the present invention has is: compared to traditional Boost, (its output voltage is ) and Z source booster converter (its output voltage is ) etc. DC/DC converter, when identical duty ratio and input voltage, have higher output voltage, output voltage is under identical input voltage and output voltage condition, circuit of the present invention only needs less duty ratio just inferior grade voltage can be risen to high-grade voltage, and input and output altogether, switching tube stress is lower, structure is simple and efficiency is high, therefore circuit of the present invention has application prospect very widely.
Accompanying drawing explanation
Fig. 1 is a kind of high-gain Z source boost converter configuration figure altogether.
Fig. 2 is the voltage and current waveform of a switch periods main element.
Fig. 3 a ~ Fig. 3 b is circuit modal graph in a switch periods.
Fig. 4 is the gain V of circuit of the present invention, Boost and Z source booster converter o/ V inwith the oscillogram of duty ratio D change.
Embodiment
For setting forth content of the present invention and feature further, below in conjunction with accompanying drawing, specific embodiment of the invention scheme is specifically described, but enforcement of the present invention is not limited thereto.
Basic Topological of the present invention and each main element electric current and voltage reference direction are as shown in Figure 1.In order to easy analysis, the device in circuit structure is all considered as ideal component.The drive singal V of switching tube S gS, the first diode D 1current i d1, the second diode D 2current i d2, the first inductance L 1current i l1, the second inductance L 2current i l2, the first electric capacity C 1voltage V c1, the second electric capacity C 2voltage V c2oscillogram as shown in Figure 2.
(1) at (t 0~ t 1) stage, converter this stage modal graph as shown in Figure 3 a, the drive singal V of switching tube S gShigh level is become, switching tube S conducting, the first diode D from low level 1bear reverse voltage cut-off, the second diode D 2bear forward voltage conducting.First electric capacity C 1with the second electric capacity C 2the first inductance L is given respectively by switching tube S 1with the second inductance L 2charging, in addition, the first electric capacity C 1with the second electric capacity C 2give output capacitance C by switching tube S simultaneously outcharging and load supplying.
(2) at (t 1~ t 2) stage, converter this stage modal graph as shown in Figure 3 b, the drive singal V of switching tube S gSbecome low level from high level, switching tube S turns off, the first diode D 1bear forward voltage conducting, the second diode D 2bear reverse voltage cut-off.Direct-current input power supplying V inwith the first inductance L 1by the first diode D 1give the second electric capacity C simultaneously 2charging, direct-current input power supplying V inwith the second inductance L 2by the second diode D 2give the first electric capacity C simultaneously 1charging.Output capacitance C outpowering load, to maintain output voltage V outconstant.
(3) steady-state gain of circuit of the present invention
Due to the first inductance L 1with the second inductance L 2inductance value identical, the first electric capacity C 1with the second electric capacity C 2capacitance identical, and be a symmetrical structure, therefore the first inductance L 1, the first electric capacity C 1respectively with the second inductance L 2, the second electric capacity C 2voltage, electric current equal.
Input voltage V is obtained by formula (1) inwith the first electric capacity C 1voltage V c1relational expression (2).
V C1D＝(V C1-V in)(1-D)(1)
V C 1 = 1 - D 1 - 2 D V in - - - ( 2 )
Due to the first electric capacity C 1with the second electric capacity C 2voltage equal, therefore obtain formula (3).
V C 2 = V C 1 = 1 - D 1 - 2 D V in - - - ( 3 )
Due to output voltage V outequal the first electric capacity C 1v c1with the second electric capacity C 2v c2sum, so obtain output voltage V by formula (2), (3) outwith DC input voitage V inrelational expression (4).
V out = V C 1 + V C 2 = 2 ( 1 - D ) 1 - 2 D V in - - - ( 4 )
The steady-state gain of traditional B oost converter and Z source booster converter is respectively 1/ (1-D) and (1-D)/(1-2D) (D is duty ratio), herein carry circuit and Boost, Z source booster converter steady-state gain comparison diagram as shown in Figure 4, as can be seen from Figure 4, when input voltage is 24V, circuit in this paper only needs duty ratio to be 0.4 just can rise to about 144V, and another two kinds of converters need larger duty ratio.

Claims (2)

1. the high-gain Z source booster converter on ground altogether, is characterized in that comprising direct-current input power supplying (V in), the first diode (D 1), the first inductance (L 1), the second inductance (L 2), the first electric capacity (C 1), the second electric capacity (C 2), switching tube (S), the second diode (D 2), output capacitance (C out) and load.
2. require described a kind of high-gain Z source booster converter altogether according to right 1, be primarily characterized in that: described direct-current input power supplying (V in) one end and the first diode (D 1) anode connect; The first described diode (D 1) negative electrode and the first inductance (L 1) one end, the first electric capacity (C 1) one end and the second diode (D 2) anode connect; The first described inductance (L 1) other one end and the second electric capacity (C 2) one end be connected with the drain electrode of switching tube (S); The first described electric capacity (C 1) other one end and the source electrode of switching tube (S) and the second inductance (L 2) one end connect; The second described diode (D 2) and output capacitance (C out) one end be connected with one end of load; Described output capacitance (C out) in parallel with load; Described direct-current input power supplying V inother one end and the second electric capacity (C 2) other one end, the second inductance (L 2) other one end, output capacitance (C out) other one end be connected with other one end of load.
CN201510224460.7A 2015-05-01 2015-05-01 Common-ground high-gain Z source boost converter Pending CN105450020A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201510224460.7A CN105450020A (en) 2015-05-01 2015-05-01 Common-ground high-gain Z source boost converter
PCT/CN2015/100157 WO2016177011A1 (en) 2015-05-01 2015-12-31 Ground-sharing high-gain z source boost converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510224460.7A CN105450020A (en) 2015-05-01 2015-05-01 Common-ground high-gain Z source boost converter

Publications (1)

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WO (1) WO2016177011A1 (en)

Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN106602869A (en) * 2017-01-26 2017-04-26 华南理工大学 Common-ground high-gain Z source DC-DC convertor
CN107104590A (en) * 2017-05-24 2017-08-29 华南理工大学 A kind of quasi- boost switching DC/DC converters based on switched inductors
CN107104596A (en) * 2017-05-24 2017-08-29 华南理工大学 A kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress
CN108462391A (en) * 2018-03-13 2018-08-28 广东工业大学 A kind of impedance network DC-DC converter
CN109217670A (en) * 2018-10-18 2019-01-15 广东工业大学 A kind of new energy resources system and its source Z DC-DC converter
CN109756105A (en) * 2018-06-30 2019-05-14 华南理工大学 A kind of input and output source active switch capacitor Z boost chopper altogether
CN111245219A (en) * 2020-01-15 2020-06-05 广东工业大学 Novel embedded impedance network DC-DC converter with high power density and switching power supply

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CN109274265A (en) * 2018-11-21 2019-01-25 三峡大学 A kind of single switch high-gain Boost based on novel voltage gain unit
CN109510464A (en) * 2018-11-21 2019-03-22 三峡大学 A kind of Buck-Boost DC-DC converter having high gain boost ability
CN110880868A (en) * 2019-11-26 2020-03-13 上海申传电气股份有限公司 Novel wide-gain quadratic buck converter
CN113179015A (en) * 2021-05-12 2021-07-27 西安石油大学 High-gain DC-DC converter based on Z boost structure
CN113258812B (en) * 2021-05-31 2022-05-10 郑州大学 Low-stress boost inverter and implementation method thereof
CN113364294B (en) * 2021-07-15 2022-07-26 南通大学 Low-voltage stress and low-input current ripple high-gain converter and control method
CN114640243B (en) * 2022-03-29 2024-04-30 南方科技大学 DC conversion circuit and DC conversion system
CN115051563B (en) * 2022-06-15 2024-06-11 三峡大学 Multiple ultra-high voltage gain DC-DC converter

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106602869A (en) * 2017-01-26 2017-04-26 华南理工大学 Common-ground high-gain Z source DC-DC convertor
CN107104590A (en) * 2017-05-24 2017-08-29 华南理工大学 A kind of quasi- boost switching DC/DC converters based on switched inductors
CN107104596A (en) * 2017-05-24 2017-08-29 华南理工大学 A kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress
CN108462391A (en) * 2018-03-13 2018-08-28 广东工业大学 A kind of impedance network DC-DC converter
CN109756105A (en) * 2018-06-30 2019-05-14 华南理工大学 A kind of input and output source active switch capacitor Z boost chopper altogether
CN109756105B (en) * 2018-06-30 2024-04-26 华南理工大学 Z-source boost chopper circuit of input-output common-ground active switch capacitor
CN109217670A (en) * 2018-10-18 2019-01-15 广东工业大学 A kind of new energy resources system and its source Z DC-DC converter
CN111245219A (en) * 2020-01-15 2020-06-05 广东工业大学 Novel embedded impedance network DC-DC converter with high power density and switching power supply

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Application publication date: 20160330