CN105763045A - Coupled inductor quasi-Z-source DC-DC converter - Google Patents

Coupled inductor quasi-Z-source DC-DC converter Download PDF

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Publication number
CN105763045A
CN105763045A CN201610070967.6A CN201610070967A CN105763045A CN 105763045 A CN105763045 A CN 105763045A CN 201610070967 A CN201610070967 A CN 201610070967A CN 105763045 A CN105763045 A CN 105763045A
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CN
China
Prior art keywords
diode
electric capacity
converter
source
transformator
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
CN201610070967.6A
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Chinese (zh)
Inventor
张波
沈瀚云
罗安
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
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 CN201610070967.6A priority Critical patent/CN105763045A/en
Publication of CN105763045A publication Critical patent/CN105763045A/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
    • H02M3/10—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
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H02M3/1552—Boost converters exploiting the leakage inductance of a transformer or of an alternator as boost inductor

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

Abstract

The present invention provides a coupled inductor quasi-Z-source DC-DC converter. The converter comprises a direct current input power supply, a first inductor (L1), a first diode (D1), a first capacitor (C1), a second capacitor (C2), a transformer with a turn ratio of 1:n, a switch tube (S), a second diode (D2), an output capacitor (Cout) and a load. Compared with a flyback converter, the quasi-Z-source converter has high voltage gain and is suitable for the occasion of non-isolated high gain direct voltage transformation.

Description

A kind of coupling inductance type quasi-Z source DC-DC converter
Technical field
The present invention relates to DC/DC changer field, be specifically related to a kind of coupling inductance type quasi-Z source DC-DC converter.
Background technology
In recent years, photovoltaic power generation technology has obtained unprecedented development, and it also becomes the main Land use systems of solar energy One of.Parallel network power generation technology to alleviating energy crisis, protect environment and ensure that sustainable economic development are significant. Generally, the output voltage of photovoltaic array battery is relatively low, it is necessary to could meet wanting of combining inverter through DC/DC converter boost Ask, therefore require that DC/DC changer has higher gain and efficiency.But many boosting DC/DC changers are by dutycycle, parasitism Parameter and the restriction of loss, it is impossible to realize significantly boosting, such as anti exciting converter, its voltage gain is that nD/ (1-D), n are for becoming The depressor turn ratio, D is dutycycle, but due to the impact of parasitic parameter, its gain is restricted；The most quasi-Z source converter, its voltage Gain is 1/ (1-2D), and relatively Boost improves, but still is difficult to meet the demand of reality application.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, propose a kind of coupling inductance type quasi-Z source DC-DC and become Parallel operation.
Circuit of the present invention specifically includes direct-current input power supplying, the first inductance, the first diode, the first electric capacity, the second electricity Hold, the turn ratio is the transformator of 1:n, switching tube, the second diode, output capacitance and load.
The concrete connected mode of circuit of the present invention is: the positive pole of described direct-current input power supplying and one end of the first inductance are even 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 and the Same Name of Ends of one end of the first electric capacity and transformer primary side connect.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 the Same Name of Ends of transformer secondary, switching tube Drain electrode and the second diode anode connect.The described negative electrode of the second diode and one end of output capacitance and the one of load End connects.Described output capacitance is in parallel with load.The negative pole of described direct-current input power supplying and the other end of the first electric capacity, The other end of the source electrode of switching tube, the other end of output capacitance and load connects.
Compared with prior art, circuit of the present invention have the advantage that into: compared to traditional anti exciting converter, (it exports electricity Pressure is) and quasi-Z source converter (its output voltage is) etc. DC/DC changer, in phase In the case of same dutycycle and input voltage, having higher output voltage, output voltage is? Under the conditions of identical input voltage and output voltage, circuit of the present invention has only to less dutycycle just can be by inferior grade voltage Rise to high-grade voltage, and input and output altogether, continuous input current etc., circuit the most of the present invention has the most widely should Use prospect.
Accompanying drawing explanation
Fig. 1 is a kind of coupling inductance type quasi-Z source DC-DC converter structure chart.
Fig. 2 is the voltage and current waveform of a switch periods main element.
Fig. 3 a, Fig. 3 b are different phase circuit modal graph in a switch periods.
Fig. 4 is the circuit of the present invention in example, anti exciting converter and the gain V of quasi-Z source converterout/VinWith dutycycle D The oscillogram of change.
Detailed description of the invention
Below in conjunction with the present invention is described in further detail the explanation of embodiment and accompanying drawing, but embodiments of the present invention It is not limited to this.If it is noted that the following process having not detailed description especially or parameter, being all that those skilled in the art can join According to prior art understand or realize.
The Basic Topological of the present 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 driving signal v of switching tube SGS, the first diode D1Electric current iD1, second Diode D2Electric current iD2, the first inductance L1Electric current iL1, the magnetizing inductance L of transformator TmElectric current iLm, the first electric capacity C1Voltage VC1, Two electric capacity C2Voltage VC2Oscillogram as shown in Figure 2.
(1) at t0～t1Stage, changer this stage modal graph as shown in Figure 3 a, the driving signal v of switching tube SGS Becoming high level from low level, switching tube S turns on, the first diode D1With the second diode D2Bear backward voltage cut-off.Direct current Input power VinWith the second electric capacity C2By the first diode D1Give the first inductance L with switching tube S simultaneously1Charging, the first electric capacity C1 By switching tube S to the magnetizing inductance L of transformator TmCharging.Additionally, output capacitance CoutPowering load.
(2) at t1～t2Stage, changer this stage modal graph as shown in Figure 3 b, the driving signal v of switching tube SGS Becoming low level from high level, switching tube S turns off, the first diode D1With the second diode D2Bear forward voltage conducting.Direct current Input power VinWith the first inductance L1By the first diode D1Give the first electric capacity C simultaneously1Charging, direct-current input power supplying VinWith One inductance L1By the second diode D2Give the second electric capacity C simultaneously2, output capacitance CoutWith load charging, the excitation electricity of transformator T Sense LmBy the first diode D1To the second electric capacity C2Charging, the magnetizing inductance L of transformator TmBy the second diode D2To first Electric capacity C1, output capacitance CoutWith load charging.Additionally, direct-current input power supplying Vin, the first inductance L1Excitation electricity with transformator T Sense LmBy the first diode D1With the second diode D2Give output capacitance C simultaneouslyoutWith load charging.
The steady-state gain of circuit of the present invention is derived as follows.
By the first inductance L1Magnetizing inductance L with transformator TmVoltage meansigma methods in a switch periods be zero, can Obtain following relationship.
(Vin+VC2+nVC1)ton+(Vin-VC1)toff=0 (1)
V C 1 t o n - V C 2 n + 1 t o f f = 0 - - - ( 2 )
Again when switching tube S turns off, output voltage VoutMeet following relationship.
V o u t = V C 1 + V C 2 - n n + 1 V C 2 - - - ( 3 )
Simultaneous solution formula (1), (2), (3) available output voltage VoutWith DC input voitage VinRelation.
V o u t = 1 1 - ( n + 2 ) D V i n - - - ( 4 )
The steady-state gain of tradition anti exciting converter and quasi-Z source converter is respectively nD/ (1-D) and 1/ (1-2D), and (D is duty Ratio, n is transformer turns ratio), when turn ratio n=3, the carried circuit of the present invention increases with the stable state of anti exciting converter, quasi-Z source converter 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 the dutycycle to be to benefit comparison diagram 0.18 just can rise to about 100V, and other two changer then needs bigger dutycycle.

Claims (2)

1. a coupling inductance type quasi-Z source DC-DC converter, it is characterised in that include direct-current input power supplying, the first inductance (L1), First diode (D1), the first electric capacity (C1), the second electric capacity (C2), the turn ratio be the transformator (T) of 1:n, switching tube (S), the two or two Pole pipe (D2), output capacitance (Cout) and load；
The positive pole of described direct-current input power supplying and the first inductance (L1) one end connect；Described first inductance (L1) other end With the second electric capacity (C2) one end and the first diode (D1) anode connect；Described first diode (D1) negative electrode and first Electric capacity (C1) one end and transformator (T) former limit Same Name of Ends connect；Described second electric capacity (C2) other end and transformator (T) the different name end of secondary connects；The different name end on described transformator (T) former limit and the Same Name of Ends of transformator (T) secondary, switching tube (S) drain electrode and the second diode (D2) anode connect；Described second diode (D2) negative electrode and output capacitance (Cout) One end of one end and load connects；Described output capacitance (Cout) in parallel with load；The negative pole of described direct-current input power supplying and first Electric capacity (C1) other end, the source electrode of switching tube (S), output capacitance (Cout) other end and load other end even Connect.
A kind of coupling inductance type quasi-Z source the most according to claim 1 DC-DC converter, it is characterised in that output voltage Vout With DC input voitage VinRelation be:
, wherein D is dutycycle, and n is transformer turns ratio.
CN201610070967.6A 2016-01-31 2016-01-31 Coupled inductor quasi-Z-source DC-DC converter Pending CN105763045A (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107517016A (en) * 2017-08-31 2017-12-26 哈尔滨工业大学 With the high step-up ratio Y source inventers for suppressing the influence of coupling inductance leakage inductance
CN108599569A (en) * 2018-05-15 2018-09-28 安徽工业大学 A kind of quasi- sources Z DC/DC converters of coupling inductance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103457496A (en) * 2013-08-15 2013-12-18 南京航空航天大学 Single-stage booster inverter
CN206211838U (en) * 2016-01-31 2017-05-31 华南理工大学 A kind of quasi- Z sources DC DC converters of coupling inductance type

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103457496A (en) * 2013-08-15 2013-12-18 南京航空航天大学 Single-stage booster inverter
CN206211838U (en) * 2016-01-31 2017-05-31 华南理工大学 A kind of quasi- Z sources DC DC converters of coupling inductance type

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
WEI MO，ET AL: "Asymmetrical Γ-Source Inverters", 《IEEE TRANSACTIONS ON INDUSTRIAL 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 C042-153》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107517016A (en) * 2017-08-31 2017-12-26 哈尔滨工业大学 With the high step-up ratio Y source inventers for suppressing the influence of coupling inductance leakage inductance
CN108599569A (en) * 2018-05-15 2018-09-28 安徽工业大学 A kind of quasi- sources Z DC/DC converters of coupling inductance

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Application publication date: 20160713

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