CN113890349A - Double-input high-reliability Zeta DC-DC converter - Google Patents

Double-input high-reliability Zeta DC-DC converter Download PDF

Info

Publication number
CN113890349A
CN113890349A CN202111131191.1A CN202111131191A CN113890349A CN 113890349 A CN113890349 A CN 113890349A CN 202111131191 A CN202111131191 A CN 202111131191A CN 113890349 A CN113890349 A CN 113890349A
Authority
CN
China
Prior art keywords
capacitor
inductor
extension unit
diode
terminal
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
CN202111131191.1A
Other languages
Chinese (zh)
Inventor
邾玢鑫
郭浩
刘佳欣
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.)
China Three Gorges University CTGU
Original Assignee
China Three Gorges University CTGU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Three Gorges University CTGU filed Critical China Three Gorges University CTGU
Priority to CN202111131191.1A priority Critical patent/CN113890349A/en
Publication of CN113890349A publication Critical patent/CN113890349A/en
Pending legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

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

Abstract

A dual-input high-reliability Zeta DC-DC converter comprises two direct current input sources, a basic Zeta converter, an input unit,ma forward direction extension unit for the forward direction extension unit,nand a reverse voltage extension unit. The forward and reverse extension units are composed of an inductor, two capacitors and a diode, and the adjustment of the input and output gains of the converter and the voltage stress of the switching device can be realized by adjusting the number of the forward and reverse extension units. The converter has the characteristics of simple control and drive circuit, wide input and output voltage regulation range and high reliability; when one of the switching tubes is damaged, other circuits can work normally; is suitable for the output and input voltage and the output voltage variation rangeThe enclosure is large, two power supplies are needed to supply power simultaneously, and the application occasion is high in reliability requirement.

Description

Double-input high-reliability Zeta DC-DC converter
Technical Field
The invention relates to a DC-DC converter, in particular to a double-input high-reliability Zeta DC-DC converter.
Background
In the application occasions with large input and output voltage changes, the input voltage can be higher than the output voltage or lower than the output voltage, and the common non-isolated Buck-Boost DC-DC converter suitable for the application occasions comprises Buck-Boost circuits, Cuk circuits, Sepic circuits and Zeta circuits. Theoretically, by adjusting the duty ratio D, the input-output gain of these converters can be varied from zero to infinity, but the boost capability of these converters is greatly limited due to the influence of the parasitic parameters of the components and circuits.
At present, the scheme of the input and output gain of the dual-input DC-DC converter basically does not have high-gain output and has poor reliability. Therefore, the research is of great significance for the double-input boost-buck DC/DC converter which can realize high-gain boost and has high reliability.
Disclosure of Invention
The problem that an existing non-isolated type double-input high-gain DC-DC converter is low in reliability is solved. The invention provides a double-input high-reliability Zeta DC-DC converter based on a basic Zeta converter, which consists of the basic Zeta converter, an input unit and a plurality of gain expansion units. The input and output gains of the converter and the voltage stress of the switching device can be adjusted by adjusting the number of the gain expansion units. The converter has the characteristics of simple control and drive circuit, wide input and output voltage regulation range and high reliability; when one of the switching tubes of the expansion unit is damaged, other circuits can work normally; the power supply is suitable for application occasions with large variation range of output and input voltage and output voltage, power supply by two power supplies and high reliability requirement.
The technical scheme adopted by the invention is as follows:
a dual-input high reliability ZetaDC-DC converter, the converter comprising:
the device comprises two direct current input sources, a basic Zeta converter, an input unit, m positive expansion units and n negative expansion units;
the basic Zeta converter comprises an inductor L1、L2Capacitor C1、C2Power switch S1Diode D1(ii) a Wherein,
power switch S1Is connected with a DC input source uin1Positive pole of (2), power switch S1OfPole-to-pole connection inductance L1One terminal of (1), a capacitor C1One terminal of (C), a capacitor1Are respectively connected with an inductor L at the other end2One terminal of (1), diode D1Cathode of (2), inductor L2The other end of the capacitor C is connected with a capacitor C2One end of (a); capacitor C2Another terminal of (1), diode D1Anode of (2), inductor L1The other ends of the two are connected with a direct current input source uin1The negative electrode of (1);
the input unit comprises an inductor L3、L4Capacitor C3、C4Power switch S2Diode D2(ii) a Wherein the power switch S2Is connected with a DC input source uin2Positive pole of (2), power switch S2Are respectively connected with an inductor L3One terminal of (1), a capacitor C3One terminal of (C), a capacitor3Are respectively connected with an inductor L at the other end4One terminal of (1), diode D2Cathode of (2), inductor L4The other end of the capacitor C is connected with a capacitor C4One terminal of (C), a capacitor4Another end of the diode D2Anode of (2), inductor L3The other end of the DC input circuit is connected with a DC input source uin1The negative electrode of (1);
m forward extension units:
the 1 st forward extension unit comprises an inductor LM11Diode DM11Capacitor CM11、CM12(ii) a Wherein, the capacitor CM11Are respectively connected with an inductor L at the other endM11One terminal of (1), diode DM11Cathode of (2), inductor LM11The other end of the capacitor C is connected with a capacitor CM12One terminal of (C), a capacitorM12Another end of the diode DM11The anode of (1);
the 2 nd forward extension unit comprises an inductor LM21Diode DM21Capacitor CM21、CM22(ii) a Wherein, the capacitor CM21Are respectively connected with an inductor L at the other endM21One terminal of (1), diode DM21Cathode of (2), inductor LM21The other end of the capacitor C is connected with a capacitor CM22One terminal of (C), a capacitorM22Another end of the diode DM21The anode of (1);
.... times, in the ith forward extension unit, 1< i ≦ m,
the ith forward extension unit comprises an inductor LMi1Diode DMi1Capacitor CMi1、CMi2(ii) a Wherein, the capacitor CMi1Are respectively connected with an inductor L at the other endMi1One terminal of (1), diode DMi1Cathode of (2), inductor LMi1The other end of the capacitor C is connected with a capacitor CMi2One terminal of (C), a capacitorMi2Another end of the diode DMi1The anode of (1);
the connection form between the forward extension units is as follows:
capacitor C in ith forward extension unitMi1One end of the positive extension unit is connected with a capacitor C in the (i-1) th positive extension unitM(i-1)1The other end of (a); capacitor C in ith forward extension unitMi2The other end of the positive extension unit is connected with a capacitor C in the (i-1) th positive extension unitM(i-1)2One end of (a);
capacitor C in i-1 th forward extension unitM(i-1)1One end of the positive extension unit is connected with a capacitor C in the (i-2) th positive extension unitM(i-2)1The other end of (a); capacitor C in i-1 th forward extension unitM(i-1)2The other end of the positive extension unit is connected with a capacitor C in the (i-2) th positive extension unitM(i-2)2One end of (a);
.... analogized in turn,
capacitor C in 2 nd forward extension unitM21One end of the positive extension unit is connected with a capacitor C in the 1 st positive extension unitM11The other end of (a); capacitor C in 2 nd forward extension unitM22The other end of the positive extension unit is connected with a capacitor C in the 1 st positive extension unitM12One end of (a);
capacitance C in the 1 st forward extension unitM11One terminal of which is connected to the capacitor C in the basic Zeta converter1The other end of (a); capacitance C in the 1 st forward extension unitM12The other end is connected with a capacitor C in the basic Zeta converter2One end of (a);
n negative-going extension units:
the 1 st negative direction extension unit comprises an inductor LN11Diode DN11Capacitor CN11、CN12(ii) a Wherein, the capacitor CN11Are respectively connected with an inductor L at the other endN11One terminal of (1), diode DN11Cathode of (2), inductor LN11The other end of the capacitor C is connected with a capacitor CN12One terminal of (C), a capacitorN12Another end of the diode DMi1The anode of (1);
the 2 nd negative direction extension unit comprises an inductor LN21Diode DN21Capacitor CN21、CN22(ii) a Wherein, the capacitor CN21Another end of the inductor L is connected with the inductor LN21One terminal of (1), diode DN21Cathode of (2), inductor LN21The other end of the capacitor C is connected with a capacitor CN22One terminal of (C), a capacitorN22Another end of the diode DN21The anode of (1);
.... times, in the j-th negative voltage extension unit, 1< j ≦ n,
the jth negative extension unit comprises an inductor LNj1Diode DNj1Capacitor CNj1、CNj2(ii) a Wherein, the capacitor CNj1Are respectively connected with an inductor L at the other endNj1One terminal of (1), diode DNj1Cathode of (2), inductor LNj1The other end of the capacitor C is connected with a capacitor CNj2One terminal of (C), a capacitorNj2Another end of the diode DNj1The anode of (1);
the connection form between the negative direction extension units is as follows:
capacitor C in jth negative direction extension unitNj1One end of the negative-going extension unit is connected with the capacitor C in the j-1 th negative-going extension unitN(j-1)1The other end of (a); capacitance C in ith negative direction extension unitNj2One end of the negative-going extension unit is connected with the capacitor C in the j-1 th negative-going extension unitN(j-1)2The other end of (a);
capacitor C in j-1 th negative extension unitN(j-1)1One end of the negative-going extension unit is connected with the capacitor C in the j-2 th negative-going extension unitN(j-2)1The other end of (a); capacitor C in j-1 th negative extension unitN(j-1)2One end of the negative-going extension unit is connected with the capacitor C in the j-2 th negative-going extension unitN(j-2)2The other end of (a);
.... analogized in turn,
capacitor C in 2 nd negative direction extension unitN21One end of the first negative extension unit is connected with a capacitor C in the 1 st negative extension unitN11The other end of (a); capacitor C in 2 nd negative direction extension unitN22One end of the first negative extension unit is connected with a capacitor C in the 1 st negative extension unitN12The other end of (a);
capacitor C in 1 st negative direction extension unitN11One terminal of which is connected to the capacitor C in the basic Zeta converter3The other end of (1) th negative extension cell, capacitor CN12One terminal of which is connected to the capacitor C in the basic Zeta converter4The other end of (a);
one end of a load R is connected with a capacitor C in the mth forward extension unitMm2The other end of the load R is connected with the capacitor C in the nth negative direction extension unitNn2And the other end of the same.
The power switch S1、S2The duty ratio of the grid electrode is variable between 0 and 1 when the switching tube S is switched on and off1Or S2When damaged, the whole circuit can continue to work normally.
When the number of expansion units m is 1 and n is 1, the invention provides a dual-input high-reliability ZetadC-DC converter, which is characterized by comprising the following components:
the device comprises two direct current input sources, a basic Zeta converter, an input unit, m positive expansion units and n negative expansion units;
the basic Zeta converter comprises an inductor L1、L2Capacitor C1、C2Power switch S1Diode D1(ii) a Wherein,
power switch S1Is connected with a DC input source uin1Positive pole of (2), power switch S1Are respectively connected with an inductor L1One terminal of (1), a capacitor C1One terminal of (C), a capacitor1Are respectively connected with an inductor L at the other end2One terminal of (1), diode D1Cathode of (2), inductor L2The other end of the capacitor C is connected with a capacitor C2One end of (a); capacitor C2Another terminal of (1), diode D1Anode of (2), inductor L1Are all connected toDirect current input source uin1The negative electrode of (1);
the input unit comprises an inductor L3、L4Capacitor C3、C4Power switch S2Diode D2(ii) a Wherein the power switch S2Is connected with a DC input source uin2Positive pole of (2), power switch S2Are respectively connected with an inductor L3One terminal of (1), a capacitor C3One terminal of (C), a capacitor3Are respectively connected with an inductor L at the other end4One terminal of (1), diode D2Cathode of (2), inductor L4The other end of the capacitor C is connected with a capacitor C4One terminal of (C), a capacitor4Another end of the diode D2Anode of (2), inductor L3The other end of the DC input circuit is connected with a DC input source uin1The negative electrode of (1);
the 1 st forward extension unit comprises an inductor LM11Diode DM11Capacitor CM11、CM12(ii) a Wherein, the capacitor CM11Are respectively connected with an inductor L at the other endM11One terminal of (1), diode DM11Cathode of (2), inductor LM11The other end of the capacitor C is connected with a capacitor CM12One terminal of (C), a capacitorM12Another end of the diode DM11The anode of (1);
capacitance C in the 1 st forward extension unitM11One terminal of which is connected to the capacitor C in the basic Zeta converter1The other end of (a); capacitance C in the 1 st forward extension unitM12The other end is connected with a capacitor C in the basic Zeta converter2One end of (a);
the 1 st negative direction extension unit comprises an inductor LN11Diode DN11Capacitor CN11、CN12(ii) a Wherein, the capacitor CN11Are respectively connected with an inductor L at the other endN11One terminal of (1), diode DN11Cathode of (2), inductor LN11The other end of the capacitor C is connected with a capacitor CN12One terminal of (C), a capacitorN12Another end of the diode DMi1The anode of (1);
capacitor C in 1 st negative direction extension unitN11One terminal of which is connected to the capacitor C in the basic Zeta converter3The other end of (1) th negative extension cell, capacitor CN12One terminal of which is connected to the capacitor C in the basic Zeta converter4The other end of (a);
one end of a load R is connected with a capacitor C in the 1 st forward extension unitM12The other end of the load R is connected with the capacitor C in the 1 st negative direction extension unitN12And the other end of the same.
The invention discloses a double-input high-reliability ZetaDC-DC converter, which has the following technical effects:
1) the buck-boost can be realized simultaneously, the input and output gains are high, and the output capacitors are connected in series and share voltage. Inductor L1And L3When the current of (2) is continuously conducted, the following is concrete:
when u isin1＝uin2The maximum input-output gain is:
Figure BDA0003280538360000051
the voltage stress of the switching tube is as follows:
Figure BDA0003280538360000052
the voltage on each output capacitor is:
Figure BDA0003280538360000053
wherein: d is the duty cycle, uin1And uin2Is an input voltage uoTo output a voltage us1And us2For the voltage stress of the power switch, m is the number of the equidirectional extension units, n is the number of the reverse extension units, 0<i≤m,0≤j≤n。
2) When one switch tube is damaged, the other circuits can work normally.
Drawings
Fig. 1 is a schematic diagram of the circuit of the present invention.
Fig. 2 is a schematic diagram of a conventional Zeta converter circuit.
Fig. 3 is a circuit topology diagram when the number of forward extension units is 1 and the number of reverse extension units is 1 according to the present invention.
Fig. 4 is a graph comparing the input/output gain of the present invention with the forward extension unit number of 1 and the reverse extension unit number of 1 with the input/output gain of the conventional Zeta converter.
Fig. 5 is a simulation diagram of an output waveform when D is 0.6 when the input voltage is 30V, the number of forward extension units is 1, and the number of reverse extension units is 1 according to the present invention.
Fig. 6 is a simulation diagram of an output waveform when the switching tube S1 is broken when D is 0.6 when the input voltage is 30V, the number of forward extension units is 1, and the number of reverse extension units is 1 according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 3 shows a circuit topology when the number of extension units m is 1 and n is 1 according to the present invention:
a double-input high-reliability Zeta DC-DC converter comprises two direct current input sources, a basic Zeta converter, an input unit, m positive expansion units and n negative voltage expansion units; wherein:
the basic Zeta converter comprises two inductors L1、L2Two capacitors C1、C2A power switch S1A diode D1(ii) a The connection form is as follows: power switch S1Is connected with a DC input source uin1Positive pole of (2), power switch S1Are respectively connected with an inductor L1One terminal of and a capacitor C1One terminal of (C), a capacitor1The other end of the first and second inductors are respectively connected with the inductor L2And a diode D1Is connected to the cathode of the inductor L2Another terminal of (1) and a capacitor C2Is connected to one end of an inductor L1Another terminal of (1), diode D1Anode and capacitor C2Another end of (1) and a DC input source uin1The negative electrodes are connected;
the input unit comprises two inductors L3、L4Two capacitors C3、C4A power switch S2A diode D2(ii) a The connection form is as follows: power switch S2Is connected with a DC input source uin2Positive pole of (2), power switch S2Are respectively connected with an inductor L3One terminal of and a capacitor C3One terminal of (C), a capacitor3The other end of the first and second inductors are respectively connected with the inductor L4And a diode D2Is connected to the cathode of the inductor L4Another terminal of (1) and a capacitor C4Is connected to one terminal of a capacitor C4Another terminal of (1) and a diode D2Is connected with the anode of the inductor L3Another end of (1) and a DC input source uin1The negative electrodes are connected;
the forward and reverse extension units all have the same internal structure, and taking the 1 st forward extension unit as an example, the forward extension unit comprises: an inductance LM11A diode DM11Two capacitors CM11、CM12(ii) a Wherein, the capacitor CM11The other end of the first and second inductors are respectively connected with the inductor LM11And a diode DM11Is connected to the cathode of the inductor LM11Another terminal of (1) and a capacitor CM12Is connected to one terminal of a capacitor CM12Another terminal of (1) and a diode DM11Are connected with each other.
The connection relationship between the 1 st forward extension unit and the basic Zeta converter is as follows: capacitance C in basic Zeta converter1Another terminal of (1) and a diode D1The intersection point of the cathode connection and the capacitor C in the 1 st forward extension unitM11Is connected to one end of the inductor L in the basic Zeta converter2Another terminal of (1) and a capacitor C2One end of the diode is connected with a diode D in the 1 st forward extension unitM11Anode and capacitor CM12The other ends are connected with each other at the intersection point.
The connection relationship between the 1 st negative direction extension unit and the input unit is as follows: capacitance C in input unit3Another terminal of (1) and a diode D2The intersection point of the cathode and the capacitor C in the 1 st negative direction extension unitN11Is connected to one end of a diode D in the input unit2Anode and capacitor C4And the intersection point of the other end of the first negative direction extension unit and the inductance L in the 1 st negative direction extension unitN11Another terminal of (1) and a capacitor CN12The intersections with one end connected are connected.
The connection relationship between the basic Zeta converter and the input unit is as follows: DC input source u of basic Zeta converterin1And the negative pole of the input unit and the direct current input source u of the input unitin2Is connected to the negative pole of the basic Zeta converter2Another terminal of (1) and a diode D1The cross point of the anode connection and the input unit inductance L4Another terminal of (1) and a capacitor C4Are connected at the intersection point where one ends of the two are connected.
One end of a load R and a capacitor C in the 1 st forward extension unitM12One end of (1) and an inductor LM11The other end of the load R is connected with the capacitor C in the 1 st negative direction extension unitN12Another terminal of (1) and a diode DN11The anodes of (1) are connected at the intersection point.
The gates of power switches S1 and S2 are connected to their controllers, and their duty cycles can be varied from 0 to 1. The on-off time of the power switches S1 and S2 can be controlled by adjusting the duty ratio, and the output voltage level can be adjusted according to the voltage balance formula of the inductor.
At the inductor L1And L3When the current is continuously conducted, the circuit can be divided into 3 working states according to different power switch states:
(1): power switch S1And S2Conducting, diode D1、D2、DM11、DN11Are all turned off, at the moment, the inductance L1、L2、L3、L4、LM11、LN11Capacitor C2、CM12、C3、CN11Charging, capacitance C1、CM11、C4、CN12Discharging; inductor L1、L2、L3、L4、LM11、LN11The terminal voltage is shown as follows:
Figure BDA0003280538360000071
(2): power switch S1And S2Diode D1And D2Turn-off, diode DM11And DN11Conduction at this time, the inductance L1、L2、L3、L4、LM11、LN11Capacitor C2、CM12、C3、CN11Discharge, capacitance C1、CM11、C4、CN12Charging; inductor L1、L2、L3、L4、LM11、LN11The terminal voltage is shown as follows:
Figure BDA0003280538360000081
(3): power switch S1And S2Turn-off, diode D1、D2、DM11、DN11Are all conducted, at this time, the capacitor C1、CM11、C4、CN12Charging, inductance L1、L2、L3、L4、LM11、LN11Capacitor C2、CM12、C3、CN11Discharging; inductor L1、L2、L3、L4、LM11、LN11The terminal voltage is shown as follows:
Figure BDA0003280538360000082
from the duty cycles of the controllers connected to the gates of the power switches S1 and S2, the voltage levels across each capacitor can be derived as follows:
Figure BDA0003280538360000091
fig. 4 is a graph comparing the input/output gain of the conventional Zeta converter with the forward extension unit number of 1 and the backward extension unit number of 1 according to the present invention. As can be seen from fig. 4, the gain of the proposed converter is four times that of the conventional converter at the same duty cycle.
Fig. 5 is a simulation diagram of an output waveform when the input voltage is 30V, the number of forward extension units is 1, and the number of reverse extension units is 1, and D is 0.6, according to the invention, and the feasibility of the invention is verified through simulation.
Fig. 6 is a simulation diagram of an output waveform when the switching tube S1 is damaged when the input voltage is 30V, the number of forward extension units is 1, and the number of reverse extension units is 1, and D is 0.6, according to the invention, and the reliability of the invention is verified by simulation.

Claims (4)

1. A dual-input high-reliability ZetaDC-DC converter, characterized in that it comprises:
the device comprises two direct current input sources, a basic Zeta converter, an input unit, m positive expansion units and n negative expansion units;
the basic Zeta converter comprises an inductor L1、L2Capacitor C1、C2Power switch S1Diode D1(ii) a Wherein,
power switch S1Is connected with a DC input source uin1Positive pole of (2), power switch S1Are respectively connected with an inductor L1One terminal of (1), a capacitor C1One terminal of (C), a capacitor1Are respectively connected with an inductor L at the other end2One terminal of (1), diode D1Cathode of (2), inductor L2The other end of the capacitor C is connected with a capacitor C2One end of (a); capacitor C2Another terminal of (1), diode D1Anode of (2), inductor L1The other ends of the two are connected with a direct current input source uin1The negative electrode of (1);
the input unit comprises an inductor L3、L4Capacitor C3、C4Power switch S2Diode D2(ii) a Wherein,
power switch S2Is connected with a DC input source uin2Positive pole of (2), power switch S2Are respectively connected with an inductor L3One terminal of (1), a capacitor C3One terminal of (C), a capacitor3Are respectively connected with an inductor L at the other end4One end and two poles ofPipe D2Cathode of (2), inductor L4The other end of the capacitor C is connected with a capacitor C4One terminal of (C), a capacitor4Another end of the diode D2Anode of (2), inductor L3The other end of the DC input circuit is connected with a DC input source uin1The negative electrode of (1);
m forward extension units:
the 1 st forward extension unit comprises an inductor LM11Diode DM11Capacitor CM11、CM12(ii) a Wherein, the capacitor CM11Are respectively connected with an inductor L at the other endM11One terminal of (1), diode DM11Cathode of (2), inductor LM11The other end of the capacitor C is connected with a capacitor CM12One terminal of (C), a capacitorM12Another end of the diode DM11The anode of (1);
the 2 nd forward extension unit comprises an inductor LM21Diode DM21Capacitor CM21、CM22(ii) a Wherein, the capacitor CM21Are respectively connected with an inductor L at the other endM21One terminal of (1), diode DM21Cathode of (2), inductor LM21The other end of the capacitor C is connected with a capacitor CM22One terminal of (C), a capacitorM22Another end of the diode DM21The anode of (1);
.... times, in the ith forward extension unit, 1< i ≦ m,
the ith forward extension unit comprises an inductor LMi1Diode DMi1Capacitor CMi1、CMi2(ii) a Wherein, the capacitor CMi1Are respectively connected with an inductor L at the other endMi1One terminal of (1), diode DMi1Cathode of (2), inductor LMi1The other end of the capacitor C is connected with a capacitor CMi2One terminal of (C), a capacitorMi2Another end of the diode DMi1The anode of (1);
the connection form between the forward extension units is as follows:
capacitor C in ith forward extension unitMi1One end of the positive extension unit is connected with a capacitor C in the (i-1) th positive extension unitM(i-1)1The other end of (a); capacitor C in ith forward extension unitMi2The other end of the positive electrode is connected with the capacitor in the (i-1) th forward extension unitCM(i-1)2One end of (a);
capacitor C in i-1 th forward extension unitM(i-1)1One end of the positive extension unit is connected with a capacitor C in the (i-2) th positive extension unitM(i-2)1The other end of (a); capacitor C in i-1 th forward extension unitM(i-1)2The other end of the positive extension unit is connected with a capacitor C in the (i-2) th positive extension unitM(i-2)2One end of (a);
.... analogized in turn,
capacitor C in 2 nd forward extension unitM21One end of the positive extension unit is connected with a capacitor C in the 1 st positive extension unitM11The other end of (a); capacitor C in 2 nd forward extension unitM22The other end of the positive extension unit is connected with a capacitor C in the 1 st positive extension unitM12One end of (a);
capacitance C in the 1 st forward extension unitM11One terminal of which is connected to the capacitor C in the basic Zeta converter1The other end of (a); capacitance C in the 1 st forward extension unitM12The other end is connected with a capacitor C in the basic Zeta converter2One end of (a);
n negative-going extension units:
the 1 st negative direction extension unit comprises an inductor LN11Diode DN11Capacitor CN11、CN12(ii) a Wherein, the capacitor CN11Are respectively connected with an inductor L at the other endN11One terminal of (1), diode DN11Cathode of (2), inductor LN11The other end of the capacitor C is connected with a capacitor CN12One terminal of (C), a capacitorN12Another end of the diode DMi1The anode of (1);
the 2 nd negative direction extension unit comprises an inductor LN21Diode DN21Capacitor CN21、CN22(ii) a Wherein, the capacitor CN21Another end of the inductor L is connected with the inductor LN21One terminal of (1), diode DN21Cathode of (2), inductor LN21The other end of the capacitor C is connected with a capacitor CN22One terminal of (C), a capacitorN22Another end of the diode DN21The anode of (1);
.... times, in the j-th negative voltage extension unit, 1< j ≦ n,
j-th negative direction extension unitComprising an inductance LNj1Diode DNj1Capacitor CNj1、CNj2(ii) a Wherein, the capacitor CNj1Are respectively connected with an inductor L at the other endNj1One terminal of (1), diode DNj1Cathode of (2), inductor LNj1The other end of the capacitor C is connected with a capacitor CNj2One terminal of (C), a capacitorNj2Another end of the diode DNj1The anode of (1);
the connection form between the negative direction extension units is as follows:
capacitor C in jth negative direction extension unitNj1One end of the negative-going extension unit is connected with the capacitor C in the j-1 th negative-going extension unitN(j-1)1The other end of (a); capacitance C in ith negative direction extension unitNj2One end of the negative-going extension unit is connected with the capacitor C in the j-1 th negative-going extension unitN(j-1)2The other end of (a);
capacitor C in j-1 th negative extension unitN(j-1)1One end of the negative-going extension unit is connected with the capacitor C in the j-2 th negative-going extension unitN(j-2)1The other end of (a); capacitor C in j-1 th negative extension unitN(j-1)2One end of the negative-going extension unit is connected with the capacitor C in the j-2 th negative-going extension unitN(j-2)2The other end of (a);
.... analogized in turn,
capacitor C in 2 nd negative direction extension unitN21One end of the first negative extension unit is connected with a capacitor C in the 1 st negative extension unitN11The other end of (a); capacitor C in 2 nd negative direction extension unitN22One end of the first negative extension unit is connected with a capacitor C in the 1 st negative extension unitN12The other end of (a);
capacitor C in 1 st negative direction extension unitN11One terminal of which is connected to the capacitor C in the basic Zeta converter3The other end of (1) th negative extension cell, capacitor CN12One terminal of which is connected to the capacitor C in the basic Zeta converter4The other end of (a);
one end of a load R is connected with a capacitor C in the mth forward extension unitMm2The other end of the load R is connected with the capacitor C in the nth negative direction extension unitNn2And the other end of the same.
2. Double-input high-reliability Zeta according to claim 1A DC-DC converter, characterized by: the power switch S1、S2The duty ratio of the grid electrode is variable between 0 and 1 when the switching tube S is switched on and off1Or S2When damaged, the whole circuit can continue to work normally.
3. A dual-input high-reliability ZetaDC-DC converter is characterized in that: the converter includes:
the device comprises two direct current input sources, a basic Zeta converter, an input unit, m positive expansion units and n negative expansion units;
the basic Zeta converter comprises an inductor L1、L2Capacitor C1、C2Power switch S1Diode D1(ii) a Wherein,
power switch S1Is connected with a DC input source uin1Positive pole of (2), power switch S1Are respectively connected with an inductor L1One terminal of (1), a capacitor C1One terminal of (C), a capacitor1Are respectively connected with an inductor L at the other end2One terminal of (1), diode D1Cathode of (2), inductor L2The other end of the capacitor C is connected with a capacitor C2One end of (a); capacitor C2Another terminal of (1), diode D1Anode of (2), inductor L1The other ends of the two are connected with a direct current input source uin1The negative electrode of (1);
the input unit comprises an inductor L3、L4Capacitor C3、C4Power switch S2Diode D2(ii) a Wherein the power switch S2Is connected with a DC input source uin2Positive pole of (2), power switch S2Are respectively connected with an inductor L3One terminal of (1), a capacitor C3One terminal of (C), a capacitor3Are respectively connected with an inductor L at the other end4One terminal of (1), diode D2Cathode of (2), inductor L4The other end of the capacitor C is connected with a capacitor C4One terminal of (C), a capacitor4Another end of the diode D2Anode of (2), inductor L3The other end of the DC input circuit is connected with a DC input source uin1The negative electrode of (1);
the 1 st forward extension unit comprises an inductor LM11Diode DM11Capacitor CM11、CM12(ii) a Wherein, the capacitor CM11Are respectively connected with an inductor L at the other endM11One terminal of (1), diode DM11Cathode of (2), inductor LM11The other end of the capacitor C is connected with a capacitor CM12One terminal of (C), a capacitorM12Another end of the diode DM11The anode of (1);
capacitance C in the 1 st forward extension unitM11One terminal of which is connected to the capacitor C in the basic Zeta converter1The other end of (a); capacitance C in the 1 st forward extension unitM12The other end is connected with a capacitor C in the basic Zeta converter2One end of (a);
the 1 st negative direction extension unit comprises an inductor LN11Diode DN11Capacitor CN11、CN12(ii) a Wherein, the capacitor CN11Are respectively connected with an inductor L at the other endN11One terminal of (1), diode DN11Cathode of (2), inductor LN11The other end of the capacitor C is connected with a capacitor CN12One terminal of (C), a capacitorN12Another end of the diode DMi1The anode of (1);
capacitor C in 1 st negative direction extension unitN11One terminal of which is connected to the capacitor C in the basic Zeta converter3The other end of (1) th negative extension cell, capacitor CN12One terminal of which is connected to the capacitor C in the basic Zeta converter4The other end of (a);
one end of a load R is connected with a capacitor C in the 1 st forward extension unitM12The other end of the load R is connected with the capacitor C in the 1 st negative direction extension unitN12And the other end of the same.
4. A dual input high reliability ZetaDC-DC converter according to claim 3 wherein: at the inductor L1And L3When the current is continuously conducted, the circuit can be divided into 3 working states according to different power switch states:
(1): power switch S1And S2Conducting, diode D1、D2、DM11、DN11Are all turned off, at the moment, the inductance L1、L2、L3、L4、LM11、LN11Capacitor C2、CM12、C4、CN12Charging, capacitance C1、CM11、C3、CN11Discharging; inductor L1、L2、L3、L4、LM11、LN11The terminal voltage is shown as follows:
Figure FDA0003280538350000051
(2): power switch S1And S2Diode D1And D2Turn-off, diode DM11And DN11Conduction at this time, the inductance L1、L2、L3、L4、LM11、LN11Capacitor C1、C3、CM11、CM12、CN11、CN12Discharge, capacitance CM11、CN11Charging; inductor L1、L2、L3、L4、LM11、LN11The terminal voltage is shown as follows:
Figure FDA0003280538350000052
(3): power switch S1And S2Turn-off, diode D1、D2、DM11、DN11Are all conducted, at this time, the capacitor C1、CM11、C3、CN11Charging, inductance L1、L2、L3、L4、LM11、LN11Capacitor C2、CM12、C4、CN12Discharging; inductor L1、L2、L3、L4、LM11、LN11The terminal voltage is shown as follows:
Figure FDA0003280538350000053
CN202111131191.1A 2021-09-26 2021-09-26 Double-input high-reliability Zeta DC-DC converter Pending CN113890349A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111131191.1A CN113890349A (en) 2021-09-26 2021-09-26 Double-input high-reliability Zeta DC-DC converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111131191.1A CN113890349A (en) 2021-09-26 2021-09-26 Double-input high-reliability Zeta DC-DC converter

Publications (1)

Publication Number Publication Date
CN113890349A true CN113890349A (en) 2022-01-04

Family

ID=79006821

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111131191.1A Pending CN113890349A (en) 2021-09-26 2021-09-26 Double-input high-reliability Zeta DC-DC converter

Country Status (1)

Country Link
CN (1) CN113890349A (en)

Similar Documents

Publication Publication Date Title
CN111446854B (en) Extensible Zeta DC-DC converter
CN111431399B (en) Scalable Cuk DC-DC converter
CN111464024B (en) Buck-Boost DC-DC converter with high gain Boost capability
CN112737324B (en) Automatic voltage-sharing bipolar Zeta DC-DC converter
CN112737330B (en) High-gain Buck-Boost DC-DC converter
CN112713766B (en) High-gain Cuk DC-DC converter
CN112701923B (en) High-gain Zeta DC-DC converter
CN111464023B (en) High-gain step-up and step-down Sepic DC-DC converter
CN112737332B (en) Automatic voltage-sharing bipolar Cuk DC-DC converter
CN112737331B (en) Automatic voltage-equalizing bipolar buck-boost DC-DC converter
CN109309448B (en) Wide-input wide-output Cuk DC-DC converter
CN111446855B (en) Boost DC-DC converter with multiple basic units
CN113965085B (en) Single-input high-reliability capacitance-current consistent Cuk DC-DC converter
CN113890341A (en) Multi-input high-reliability Sepic DC-DC converter
CN113890342A (en) Multi-input high-reliability Sepic DC-DC converter with consistent capacitance and current
CN113965079A (en) Multi-input high-reliability Cuk DC-DC converter
CN113890340B (en) Single-input high-reliability capacitance-current consistent buck-boost DC-DC converter
CN113890339B (en) Multi-input high-reliability capacitance-current consistent Buck-boost DC-DC converter
CN113890349A (en) Double-input high-reliability Zeta DC-DC converter
CN113890346A (en) Double-input high-reliability capacitance current consistent Zeta DC-DC converter
CN113965083A (en) Double-input high-reliability Cuk DC-DC converter
CN113890338A (en) Double-input high-reliability capacitance-current consistent Buck-Boost DC-DC converter
CN113965082A (en) Double-input high-reliability capacitor current consistent Cuk DC-DC converter
CN113691128B (en) Single-input high-reliability Boost DC-DC converter
CN113890350A (en) Multi-input high-reliability capacitance current consistent Zeta DC-DC converter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination