CN105529918A - High-gain Trans-Z source boost converter - Google Patents

High-gain Trans-Z source boost converter Download PDF

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Publication number
CN105529918A
CN105529918A CN201511034574.1A CN201511034574A CN105529918A CN 105529918 A CN105529918 A CN 105529918A CN 201511034574 A CN201511034574 A CN 201511034574A CN 105529918 A CN105529918 A CN 105529918A
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CN
China
Prior art keywords
diode
electric capacity
transformer
converter
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201511034574.1A
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Chinese (zh)
Inventor
张波
沈瀚云
罗安
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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 CN201511034574.1A priority Critical patent/CN105529918A/en
Publication of CN105529918A publication Critical patent/CN105529918A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion 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
    • H02M3/145Conversion 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
    • H02M3/155Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion 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
    • H02M3/145Conversion 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
    • H02M3/155Conversion 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
    • H02M3/1555Conversion 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 for the generation of a regulated current to a load whose impedance is substantially inductive
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The invention provides a high-gain Trans-Z source boost converter. The converter comprises a direct-current input power supply Vin, a first inductor (L1), a first diode (D1), a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), a second diode (D2), a transformer (T) with the turn ratio of 1 to n, a switch tube (S), a third diode (D3), an output capacitor (Cout) and a load. The converter is mainly characterized in that a positive electrode of the direct-current input power supply Vin is connected with one end of the first inductor (L1). Compared with a Boost converter, a quasi Z source converter and the like, the high-gain Trans-Z source boost converter has a higher voltage gain, and is suitable for the occasion of non-isolating high-gain direct-current voltage conversion.

Description

A kind of high-gain Trans-Z source booster converter
Technical field
The present invention relates to DC/DC converter field, be specifically related to a kind of high-gain Trans-Z source booster converter.
Background technology
The development of the renewable energy system such as photovoltaic, fuel cell has become one of important means solving fossil fuel shortages and protection of the environment.But the voltage that photovoltaic, fuel cell etc. export is very low, generally needs DC/DC converter boost.But many boosting DC/DC converters are 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, but due to the impact of parasitic parameter, its gain is restricted; And for example accurate Z source converter, its voltage gain is 1/ (1-2D), and comparatively Boost improves, but still has the space of lifting.
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 Trans-Z source booster converter.
Direct-current input power supplying V is specifically comprised in circuit of the present invention in, described in the first inductance, described in the first diode, described in the first electric capacity, described in the second electric capacity, described in the 3rd electric capacity, described in the second diode, the turn ratio is for described in the transformer described in 1:n (n>=2), described in switching tube, described in the 3rd diode, described in output capacitance and load.
The concrete connected mode of circuit of the present invention is: described direct-current input power supplying V inpositive pole be connected with the one end described in the first inductance.Other one end described in the first described inductance is connected with the anode described in the first diode and the one end described in the second electric capacity.The described negative electrode described in the first diode is connected with the one end described in the one end described in the first electric capacity, the 3rd electric capacity and the anode described in the second diode.The described negative electrode described in the second diode is connected with the Same Name of Ends of secondary described in transformer.The different name end of secondary described in described transformer is connected with the Same Name of Ends on former limit described in the other one end described in the 3rd electric capacity and transformer.The different name end on former limit described in described transformer is connected with the anode described in the other one end described in the second electric capacity, the drain electrode described in switching tube and the 3rd diode.The described negative electrode described in the 3rd diode is connected with one end of the one end described in output capacitance and load.In parallel with load described in described output capacitance.Described direct-current input power supplying V innegative pole be connected with other one end of the other one end described in the other one end described in the first electric capacity, the source electrode described in switching tube, output capacitance and load.
Compared with prior art, the advantage that circuit of the present invention has is: compared to traditional Boost, (its output voltage is ) and accurate Z source 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, continuous input current etc., therefore circuit of the present invention has application prospect very widely.
Accompanying drawing explanation
Fig. 1 is a kind of high-gain Trans-Z source boost converter configuration figure.
Fig. 2 is the voltage and current waveform of a switch periods main element.
Fig. 3 a, Fig. 3 b are circuit modal graph in a switch periods.
Fig. 4 is the gain V of circuit, Boost and the accurate Z source converter proposed out/ V inwith the oscillogram of duty ratio D change.
Embodiment
Illustrate for below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.If it is noted that following process or the parameter having special detailed description, be all that those skilled in the art can refer to prior art understanding or realize.
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 3rd diode D 3current i d3, the first inductance L 1current i l1, transformer T magnetizing inductance L mcurrent i lm, the first electric capacity C 1voltage V c1, the second electric capacity C 2voltage V c2, the 3rd electric capacity C 3voltage V c3oscillogram as shown in Figure 2.
At t 0~ t 1stage, 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 1, the second diode D 2with the 3rd diode D 3bear reverse voltage cut-off.Direct-current input power supplying V inwith the second electric capacity C 2give the first inductance L by switching tube S simultaneously 1charging, the first electric capacity C 1with the 3rd electric capacity C 3given the magnetizing inductance L of transformer T by switching tube S simultaneously mcharging.In addition, output capacitance C outpowering load.
At t 1~ t 2stage, 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 1, the second diode D 2with the 3rd diode D 3bear forward voltage conducting.Direct-current input power supplying V inwith the first inductance L 1by the first diode D 1with the 3rd diode D 3give the first electric capacity C simultaneously 1, the second electric capacity C 2, the 3rd electric capacity C 3, output capacitance C outwith load charging, the magnetizing inductance L of transformer T mby the first diode D 1with the second diode D 2give the first electric capacity C simultaneously 1, the second electric capacity C 2, the 3rd electric capacity C 3, output capacitance C outcharge with load.In addition, direct-current input power supplying V in, the first inductance L 1with the magnetizing inductance L of transformer T mby the first diode D 1, the second diode D 2with the 3rd diode D 3give output capacitance C simultaneously outcharge with load.
The steady-state gain of circuit of the present invention is derived as follows.
By the first inductance L 1with the magnetizing inductance L of transformer T mthe mean value of voltage in a switch periods be zero, can following relationship be obtained.
(V in+V C2)t on+(V in-V C1)t off=0(1)
( V C 1 + V C 3 ) t o n - V C 3 n t o f f = 0 - - - ( 2 )
- V C 3 n = V C 3 - V C 2 - - - ( 3 )
Again when switching tube S turns off, output voltage V outmeet following relationship.
V out=V C1+V C2(4)
Simultaneous solution formula (1), (2), (3), (4) can obtain output voltage V outwith DC input voitage V inrelation.
V o u t = 1 1 - ( n + 2 ) D V i n - - - ( 5 )
The steady-state gain of traditional B oost converter and accurate Z source converter is respectively 1/ (1-D) and (1-D)/(1-2D) (D is duty ratio), as turn ratio n=2, the present invention carry circuit and Boost, accurate Z source converter steady-state gain comparison diagram as shown in Figure 4, as can be seen from Figure 4, when input voltage is 10V, the circuit that the present invention proposes only needs duty ratio to be 0.24 just can rise to about 250V, and another two kinds of converters then need larger duty ratio.

Claims (2)

1. a high-gain Trans-Z source booster converter, is characterized in that comprising 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 3rd electric capacity (C 3), the second diode (D 2), the turn ratio is transformer (T), switching tube (S), the 3rd diode (D of 1:n 3), output capacitance (C out) and load;
The positive pole of described direct-current input power supplying and the first inductance (L 1) one end connect; Described first inductance (L 1) other one end and the first diode (D 1) anode and the second electric capacity (C 2) one end connect; Described first diode (D 1) negative electrode and the first electric capacity (C 1) one end, the 3rd electric capacity (C 3) one end and the second diode (D 2) anode connect; Described second diode (D 2) negative electrode be connected with the Same Name of Ends of transformer (T) secondary; The different name end of described transformer (T) secondary and the 3rd electric capacity (C 3) other one end be connected with the Same Name of Ends on transformer (T) former limit; The different name end on described transformer (T) former limit and the second electric capacity (C 2) other one end, the drain electrode of switching tube (S) and the 3rd diode (D 3) anode connect; Described 3rd diode (D 3) negative electrode 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 innegative pole and the first electric capacity (C 1) other one end, the source electrode of switching tube (S), output capacitance (C out) other one end be connected with other one end of load.
2. a kind of high-gain Trans-Z source as claimed in claim 1 booster converter, is characterized in that output voltage V outwith DC input voitage V inpass be , D is duty ratio.
CN201511034574.1A 2015-12-31 2015-12-31 High-gain Trans-Z source boost converter Pending CN105529918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201511034574.1A CN105529918A (en) 2015-12-31 2015-12-31 High-gain Trans-Z source boost converter

Applications Claiming Priority (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105939126A (en) * 2016-06-30 2016-09-14 华南理工大学 Switch inductor type hybrid quasi-Z-source inverter
CN105958823A (en) * 2016-06-28 2016-09-21 华南理工大学 Current continuous high-gain switch voltage rise quasi-Z-source converter circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204316331U (en) * 2015-01-16 2015-05-06 四川瑞新轨道交通科技发展有限公司 The accurate Z source step-up/step-down circuit of track traffic automatic grounding system
CN205336112U (en) * 2015-12-31 2016-06-22 华南理工大学 High -gain trans -Z source booster converter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204316331U (en) * 2015-01-16 2015-05-06 四川瑞新轨道交通科技发展有限公司 The accurate Z source step-up/step-down circuit of track traffic automatic grounding system
CN205336112U (en) * 2015-12-31 2016-06-22 华南理工大学 High -gain trans -Z source booster converter

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
WEI QIAN,ET AL: "Trans-Z-Source inverters", 《IEEE TRANSACTION ON POWER ELECTRONICS》 *
杨立强: "阻抗源DC-DC变换器的构造研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105958823A (en) * 2016-06-28 2016-09-21 华南理工大学 Current continuous high-gain switch voltage rise quasi-Z-source converter circuit
CN105958823B (en) * 2016-06-28 2019-04-09 华南理工大学 A kind of quasi- Z source converter circuit of electric current continuous type high-gain boost switching
CN105939126A (en) * 2016-06-30 2016-09-14 华南理工大学 Switch inductor type hybrid quasi-Z-source inverter
CN105939126B (en) * 2016-06-30 2018-09-14 华南理工大学 A kind of quasi- Z-source inverter of switched inductors type mixing

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Application publication date: 20160427