CN110932544A - Multi-input modular DC/DC converter - Google Patents

Multi-input modular DC/DC converter Download PDF

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Publication number
CN110932544A
CN110932544A CN201911306503.0A CN201911306503A CN110932544A CN 110932544 A CN110932544 A CN 110932544A CN 201911306503 A CN201911306503 A CN 201911306503A CN 110932544 A CN110932544 A CN 110932544A
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China
Prior art keywords
electrically connected
capacitor
diode
input
gain
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Application number
CN201911306503.0A
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Chinese (zh)
Inventor
刘崧
武利会
梁东明
曾庆辉
刘少辉
王俊波
李国伟
李兰茵
赖艳珊
张殷
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Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Application filed by Guangdong Power Grid Co Ltd, Foshan Power Supply Bureau of Guangdong Power Grid Corp filed Critical Guangdong Power Grid Co Ltd
Priority to CN201911306503.0A priority Critical patent/CN110932544A/en
Publication of CN110932544A publication Critical patent/CN110932544A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • H02M1/0083—Converters characterised by their input or output configuration

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

Abstract

The invention relates to a multi-input modular DC/DC converter, which comprises an input module and a gain module, wherein the input module comprises a plurality of input end ports, and the gain module comprises a plurality of gain units; the output end of the input module is electrically connected with the input end of the gain module, and the gain is improved through the reasonable configuration of the port number of the input end and the gain unit. The reasonable configuration of the input port number of the input module and the gain unit of the gain module is utilized to realize high boosting capacity, and basic gain of more than several times on the basis of the altitude can be increased when the input port number or the gain unit number is increased; the invention provides a multi-input modular DC/DC converter, which realizes high boosting capacity by reasonably configuring the number of input end ports of an input module and a gain unit of a gain module, and can increase basic gain of more than several times on the basis of the high voltage every time the number of the input end ports or the number of the gain unit is increased.

Description

Multi-input modular DC/DC converter
Technical Field
The invention relates to the field of converters, in particular to a multi-input modular DC/DC converter.
Background
In the prior art, researches on DC/DC converters applied to interconnection of direct current power grids and high-capacity high-power convergence are few, the number of input ports of most converters is limited, the expansibility is poor, meanwhile, the gain is low, the control strategy is complex, and the like, so that the DC/DC converters are limited in energy interconnection and application occasions such as convergence of offshore wind power full direct current wind farms and the like.
At present, there are three main types of converters for realizing high gain: firstly, high gain is realized through resonance by utilizing a switch resonance capacitor, and simultaneously, the voltage stress of a power device is reduced. And secondly, high gain is realized by using the coupling inductor, but the use of the coupling inductor not only causes overhigh voltage stress of a switching device, but also causes magnetic interference, and increases the working loss of the converter. And thirdly, a modular multilevel technology realizes high gain through series-parallel connection between submodules, the highly modular structure can realize redundancy control, and the enhanced system reliability is high, but the converter usually needs to be added with more complex control strategies due to the large number of switches.
Disclosure of Invention
The invention provides a multi-input modular DC/DC converter for solving the problem of poor expansion of the existing high-gain converter.
In order to realize the purpose, the technical scheme is as follows:
a multi-input modular DC/DC converter comprises an input module and a gain module, wherein the input module comprises a plurality of input end ports, and the gain module comprises a plurality of gain units; the output end of the input module is electrically connected with the input end of the gain module, and the gain is improved through the reasonable configuration of the port number of the input end and the gain unit.
In the above scheme, the number of input ports of the input module and the reasonable configuration of the gain unit of the gain module are used to realize high boosting capability, and each time the number of input ports or the number of gain units is increased, the basic gain can be increased by more than several times on the basis of the altitude.
The input module comprises m input power supplies Uin1、Uin2……UinmM power switches S1、S2……SmM inductors L1、L2……Lm(ii) a Wherein:
the input power supply Uin1Positive electrode and said inductor L1One end of the inductor L is electrically connected with the inductor1The other end and the power switch S1The drain electrodes are respectively electrically connected with the input ends of the gain modules, and the power switch S1Source electrode is grounded, and the input power supply Uin1The negative electrode is electrically connected with the output end of the gain module;
the input power supply Uin2Positive pole and the power switch S2Drain electrode electrically connected to the power switch S2Source electrode and the inductor L2One end of the inductor L is electrically connected with the input end of the gain module respectively2The other end is grounded, and the input power supply Uin2The negative electrode is electrically connected with the output end of the gain module;
according to the above rule, the input power supply Uin(m-1)Positive electrode and said inductor Lm-1One end of the inductor L is electrically connected with the inductorm-1The other end and the power switch Sm-1Drain electrodeRespectively electrically connected with the input end of the gain module, and the power switch Sm-1Source electrode is grounded, and the input power supply Uin(m-1)The negative electrode is electrically connected with the output end of the gain module;
the input power supply UinmPositive pole and the power switch SmDrain electrode electrically connected to the power switch SmSource electrode and the inductor LmOne end of the inductor L is electrically connected with the input end of the gain module respectivelymThe other end is grounded, and the input power supply UinmThe negative electrode is electrically connected with the output end of the gain module.
The m power switches S1、S2……SmAny one of the power switches S comprises a field effect transistor and a diode; the drain electrode of the field effect transistor is electrically connected with the cathode of the diode, and the source electrode of the field effect transistor is electrically connected with the anode of the diode; the drain electrode of the field effect transistor is the drain electrode of the power switch, and the source electrode of the field effect transistor is the source electrode of the power switch.
The gain module comprises n gain units and m diodes D1、D2……DmCapacitor C0And a resistance RL(ii) a Wherein: the output end of the input module is electrically connected with the input end of the 1 st gain unit, the n gain units are connected in series, and the output end of the n gain unit is connected with the m diodes D1、D2……DmM of the diodes D1、D2……DmM said diodes D connected in parallel1、D2……DmAnd the capacitor C0And a resistor RLOne end of the capacitor C is electrically connected with the other end of the capacitor C0Another terminal of (1) and a resistor RLThe other end of the power supply unit is respectively connected with m input power supplies Uin1、Uin2……UinmThe negative electrodes are electrically connected.
n of said gain cells include a 1 st gain cell, a 2 nd gain cell … … n th gain cell, said 1 st gain cell including a capacitor C11、C12……C1mDiode D11、D12……D1mThe 2 nd gain unit comprises a capacitor C21、C22……C2mDiode D21、D22……D2mAnd so on, the nth gain unit comprises a capacitor Cn1、Cn2……CnmDiode Dn1、Dn2……Dnm；
Wherein: the capacitor C11、C21……Cn1Connected in series, said capacitor C12、C22……Cn2Series connection, and so on, the capacitor C1m、C2m……CnmAre connected in series;
in the 1 st gain cell, the capacitor C11And the diode D11The anode of the diode D is electrically connected with the anode of the diode11And the capacitor C12The output end of the capacitor C is electrically connected with the output end of the capacitor12And the diode D12The anode of the diode D is electrically connected with the anode of the diode12And the capacitor C13The output ends of the capacitors are electrically connected, and so on, the capacitor C1(m-1)And the diode D1(m-1)The anode of the diode D is electrically connected with the anode of the diode1(m-1)And the capacitor C1mThe output end of the capacitor C is electrically connected with the output end of the capacitor1mAnd the diode D1mThe anode of the diode D is electrically connected with the anode of the diode1mAnd the capacitor C11The output ends of the two ends are electrically connected;
in the 2 nd gain cell, the capacitor C21And the diode D21The anode of the diode D is electrically connected with the anode of the diode21And the capacitor C22The output end of the capacitor C is electrically connected with the output end of the capacitor22And the diode D22The anode of the diode D is electrically connected with the anode of the diode22And the capacitor C23The output ends of the capacitors are electrically connected, and so on, the capacitor C2(m-1)And the diode D2(m-1)The anode of the diode D is electrically connected with the anode of the diode2(m-1)And the capacitor C2mThe output end of the capacitor C is electrically connected with the output end of the capacitor2mAnd the diode D2mThe anode of the diode D is electrically connected with the anode of the diode2mAnd the capacitor C21The output ends of the two ends are electrically connected;
and so on, in the nth gain unit, the capacitor Cn1And the diode Dn1The anode of the diode D is electrically connected with the anode of the dioden1And the capacitor Cn2The output end of the capacitor C is electrically connected with the output end of the capacitorn2And the diode Dn2The anode of the diode D is electrically connected with the anode of the dioden2And the capacitor Cn3The output ends of the capacitors are electrically connected, and so on, the capacitor Cn(m-1)And the diode Dn(m-1)The anode of the diode D is electrically connected with the anode of the dioden(m-1)And the capacitor CnmThe output end of the capacitor C is electrically connected with the output end of the capacitornmAnd the diode DnmThe anode of the diode D is electrically connected with the anode of the diodenmAnd the capacitor Cn1The output ends of the two ends are electrically connected.
The power switch S1Drain electrode of (1) and C11Is electrically connected with the input terminal of the power switch S2Source and C of12The input terminals of the power switch S are electrically connected, and so on, the power switch Sm-1Drain electrode of (1) and C1(m-1)Is electrically connected with the input terminal of the power switch SmSource and C of1mThe input ends are electrically connected;
said C isn1And the output end of D1Is electrically connected with the anode, Cn2And the output end of D2The anode of (A) is electrically connected, and so on, the step (C)nmAnd the output end of DmThe anode is electrically connected.
m said input power supply Uin1、Uin2……UinmAre all low-voltage input power supplies.
m said inductors L1、L2……LmAre all filter inductors.
The capacitor C0Is a filter capacitor.
m said diodes D1、D2……DmAre all rectifier filter diodes.
A control method of a multi-input modular DC/DC converter adopts the following steps: m power switches S1～SmThe grid of the grid is connected with a phase synchronous PWM wave control signal; the switching tubes are synchronously controlled, so that the complexity of the design of a control system can be effectively reduced; the duty cycle of the converter is not limited by D compared to other interleaved parallel type converters>0.5, and lower voltage and current stress of the active device can be obtained by adjusting the number of input end ports and the number of gain units.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a multi-input modular DC/DC converter, which realizes high boosting capacity by reasonably configuring the number of input end ports of an input module and a gain unit of a gain module, and can increase basic gain of more than several times on the basis of the high voltage every time the number of the input end ports or the number of the gain unit is increased.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a circuit topology diagram of the 4-phase input port number and 2 gain cells of the present invention;
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
the invention is further illustrated below with reference to the figures and examples.
Example 1
As shown in fig. 1, a multi-input modular DC/DC converter includes an input module and a gain module, wherein the input module includes a plurality of input ports, and the gain module includes a plurality of gain units; the output end of the input module is electrically connected with the input end of the gain module, and the gain is improved through the reasonable configuration of the port number of the input end and the gain unit.
In the above scheme, the number of input ports of the input module and the reasonable configuration of the gain unit of the gain module are used to realize high boosting capability, and each time the number of input ports or the number of gain units is increased, the basic gain can be increased by more than several times on the basis of the altitude.
The input module comprises m input power supplies Uin1、Uin2……UinmM power switches S1、S2……SmM inductors L1、L2……Lm(ii) a Wherein:
the input power supply Uin1Positive electrode and said inductor L1One end of the inductor L is electrically connected with the inductor1The other end and the power switch S1The drain electrodes are respectively electrically connected with the input ends of the gain modules, and the power switch S1Source electrode is grounded, and the input power supply Uin1The negative electrode is electrically connected with the output end of the gain module;
the input power supply Uin2Positive pole and the power switch S2Drain electrode electrically connected to the power switch S2Source electrode and the inductor L2One end of the inductor L is electrically connected with the input end of the gain module respectively2The other end is grounded, and the input power supply Uin2The negative electrode is electrically connected with the output end of the gain module;
according to the above rule, the input power supply Uin(m-1)Positive electrode and said inductor Lm-1One end of the inductor L is electrically connected with the inductorm-1The other end and the power switch Sm-1The drain electrodes are respectively electrically connected with the input ends of the gain modules, and the power switch Sm-1Source electrode is grounded, and the input power supply Uin(m-1)The negative electrode is electrically connected with the output end of the gain module;
the input power supply UinmPositive pole and the power switch SmDrain electrode electrically connected to the power switch SmSource electrode and the inductor LmOne end of the input terminal is electrically connected with the input end of the gain module respectivelySaid inductance LmThe other end is grounded, and the input power supply UinmThe negative electrode is electrically connected with the output end of the gain module.
The m power switches S1、S2……SmAny one of the power switches S comprises a field effect transistor and a diode; the drain electrode of the field effect transistor is electrically connected with the cathode of the diode, and the source electrode of the field effect transistor is electrically connected with the anode of the diode; the drain electrode of the field effect transistor is the drain electrode of the power switch, and the source electrode of the field effect transistor is the source electrode of the power switch.
The gain module comprises n gain units and m diodes D1、D2……DmCapacitor C0And a resistance RL(ii) a Wherein: the output end of the input module is electrically connected with the input end of the 1 st gain unit, the n gain units are connected in series, and the output end of the n gain unit is connected with the m diodes D1、D2……DmM of the diodes D1、D2……DmM said diodes D connected in parallel1、D2……DmAnd the capacitor C0And a resistor RLOne end of the capacitor C is electrically connected with the other end of the capacitor C0Another terminal of (1) and a resistor RLThe other end of the power supply unit is respectively connected with m input power supplies Uin1、Uin2……UinmThe negative electrodes are electrically connected.
n of said gain cells include a 1 st gain cell, a 2 nd gain cell … … n th gain cell, said 1 st gain cell including a capacitor C11、C12……C1mDiode D11、D12……D1mThe 2 nd gain unit comprises a capacitor C21、C22……C2mDiode D21、D22……D2mAnd so on, the nth gain unit comprises a capacitor Cn1、Cn2……CnmDiode Dn1、Dn2……Dnm；
Wherein: the capacitor C11、C21……Cn1Connected in series, said capacitor C12、C22……Cn2Series connection, and so on, the capacitor C1m、C2m……CnmAre connected in series;
in the 1 st gain cell, the capacitor C11And the diode D11The anode of the diode D is electrically connected with the anode of the diode11And the capacitor C12The output end of the capacitor C is electrically connected with the output end of the capacitor12And the diode D12The anode of the diode D is electrically connected with the anode of the diode12And the capacitor C13The output ends of the capacitors are electrically connected, and so on, the capacitor C1(m-1)And the diode D1(m-1)The anode of the diode D is electrically connected with the anode of the diode1(m-1)And the capacitor C1mThe output end of the capacitor C is electrically connected with the output end of the capacitor1mAnd the diode D1mThe anode of the diode D is electrically connected with the anode of the diode1mAnd the capacitor C11The output ends of the two ends are electrically connected;
in the 2 nd gain cell, the capacitor C21And the diode D21The anode of the diode D is electrically connected with the anode of the diode21And the capacitor C22The output end of the capacitor C is electrically connected with the output end of the capacitor22And the diode D22The anode of the diode D is electrically connected with the anode of the diode22And the capacitor C23The output ends of the capacitors are electrically connected, and so on, the capacitor C2(m-1)And the diode D2(m-1)The anode of the diode D is electrically connected with the anode of the diode2(m-1)And the capacitor C2mThe output end of the capacitor C is electrically connected with the output end of the capacitor2mAnd the diode D2mThe anode of the diode D is electrically connected with the anode of the diode2mAnd the capacitor C21The output ends of the two ends are electrically connected;
and so on, in the nth gain unit, soThe capacitor Cn1And the diode Dn1The anode of the diode D is electrically connected with the anode of the dioden1And the capacitor Cn2The output end of the capacitor C is electrically connected with the output end of the capacitorn2And the diode Dn2The anode of the diode D is electrically connected with the anode of the dioden2And the capacitor Cn3The output ends of the capacitors are electrically connected, and so on, the capacitor Cn(m-1)And the diode Dn(m-1)The anode of the diode D is electrically connected with the anode of the dioden(m-1)And the capacitor CnmThe output end of the capacitor C is electrically connected with the output end of the capacitornmAnd the diode DnmThe anode of the diode D is electrically connected with the anode of the diodenmAnd the capacitor Cn1The output ends of the two ends are electrically connected.
The power switch S1Drain electrode of (1) and C11Is electrically connected with the input terminal of the power switch S2Source and C of12The input terminals of the power switch S are electrically connected, and so on, the power switch Sm-1Drain electrode of (1) and C1(m-1)Is electrically connected with the input terminal of the power switch SmSource and C of1mThe input ends are electrically connected;
said C isn1And the output end of D1Is electrically connected with the anode, Cn2And the output end of D2The anode of (A) is electrically connected, and so on, the step (C)nmAnd the output end of DmThe anode is electrically connected.
A control method of a multi-input modular DC/DC converter adopts the following steps: m power switches S1～SmThe grid of the grid is connected with a phase synchronous PWM wave control signal; the switching tubes are synchronously controlled, so that the complexity of the design of a control system can be effectively reduced; the duty cycle of the converter is not limited by D compared to other interleaved parallel type converters>0.5, and lower voltage and current stress of the active device can be obtained by adjusting the number of input end ports and the number of gain units.
Example 2
As shown in fig. 2, a multi-input modular DC/DC converter includes an input module and a gain module, wherein the input module includes a plurality of input ports, and the gain module includes a plurality of gain units; the output end of the input module is electrically connected with the input end of the gain module, and the gain is improved through the reasonable configuration of the port number of the input end and the gain unit.
In the above scheme, the number of input ports of the input module and the reasonable configuration of the gain unit of the gain module are used to realize high boosting capability, and each time the number of input ports or the number of gain units is increased, the basic gain can be increased by more than several times on the basis of the altitude.
The input module comprises an input power supply Uin1、Uin2、Uin3And Uin4Power switch S1、S2、S3And S4Inductance L1、L2、L3And L4(ii) a Wherein:
the input power supply Uin1Positive electrode and said inductor L1One end of the inductor L is electrically connected with the inductor1The other end and the power switch S1The drain electrodes are respectively electrically connected with the input ends of the gain modules, and the power switch S1Source electrode is grounded, and the input power supply Uin1The negative electrode is electrically connected with the output end of the gain module;
the input power supply Uin2Positive pole and the power switch S2Drain electrode electrically connected to the power switch S2Source electrode and the inductor L2One end of the inductor L is electrically connected with the input end of the gain module respectively2The other end is grounded, and the input power supply Uin2The negative electrode is electrically connected with the output end of the gain module;
the input power supply Uin3Positive electrode and said inductor L3One end of the inductor L is electrically connected with the inductor3The other end and the power switch S3The drain electrodes are respectively electrically connected with the input ends of the gain modules, and the power switch S3Source electrode is grounded, and the input power supply Uin3The negative electrode is electrically connected with the output end of the gain module;
the input power supply Uin4Positive pole and the power switch S4Drain electrode electrically connected to the power switch S4Source electrode and the inductor L4One end of the inductor L is electrically connected with the input end of the gain module respectively4The other end is grounded, and the input power supply Uin4The negative electrode is electrically connected with the output end of the gain module.
The power switch S1、S2、S3And S4Any one of the power switches S comprises a field effect transistor and a diode; the drain electrode of the field effect transistor is electrically connected with the cathode of the diode, and the source electrode of the field effect transistor is electrically connected with the anode of the diode; the drain electrode of the field effect transistor is the drain electrode of the power switch, and the source electrode of the field effect transistor is the source electrode of the power switch.
The gain module comprises 2 gain units and a diode D1、D2、D3And D4Capacitor C0And a resistance RL(ii) a Wherein: the output end of the input module is electrically connected with the input end of the 1 st gain unit, the 2 gain units are connected in series, and the output end of the 2 nd gain unit is connected with the 4 diodes D1、D2、D3And D44 of the diodes D1、D2、D3And D4Parallel connection, 4 of said diodes D1、D2、D3And D4And the capacitor C0And a resistor RLOne end of the capacitor C is electrically connected with the other end of the capacitor C0Another terminal of (1) and a resistor RLThe other end of the power supply is respectively connected with 4 input power supplies Uin1、Uin2、Uin3And Uin4The negative electrodes are electrically connected.
2 gain units including the 1 st gain unit and the 2 nd gain unit, the 1 st gain unit including a capacitor C11、C12、C13And C14Diode D11、D12、D13And D14The 2 nd gain unit comprises a capacitor C21、C22、C23And C24Diode D21、D22、D23And D24；
Wherein: the capacitor C11、C21Connected in series, said capacitor C12、C22Series connection, and so on, the capacitor C14、C24Are connected in series;
in the 1 st gain cell, the capacitor C11And the diode D11The anode of the diode D is electrically connected with the anode of the diode11And the capacitor C12The output end of the capacitor C is electrically connected with the output end of the capacitor12And the diode D12The anode of the diode D is electrically connected with the anode of the diode12And the capacitor C13The output end of the capacitor C is electrically connected with the output end of the capacitor13And the diode D13The anode of the diode D is electrically connected with the anode of the diode13And the capacitor C14The output end of the capacitor C is electrically connected with the output end of the capacitor14And the diode D14The anode of the diode D is electrically connected with the anode of the diode14And the capacitor C11The output ends of the two ends are electrically connected;
in the 2 nd gain cell, the capacitor C21And the diode D21The anode of the diode D is electrically connected with the anode of the diode21And the capacitor C22The output end of the capacitor C is electrically connected with the output end of the capacitor22And the diode D22The anode of the diode D is electrically connected with the anode of the diode22And the capacitor C23The output end of the capacitor C is electrically connected with the output end of the capacitor23And the diode D23The anode of the diode D is electrically connected with the anode of the diode23And the capacitor C24The output end of the capacitor C is electrically connected with the output end of the capacitor24And the diode D24The anode of the diode D is electrically connected with the anode of the diode24And the capacitor C21The output ends of the two ends are electrically connected.
The power switch S1Drain electrode of (1) and C11Is electrically connected with the input terminal of the power switch S2Source and C of12Is electrically connected with the input terminal of the power switch S3Drain electrode of (1) and C13Is electrically connected with the input terminal of the power switch S4Source and C of14The input ends are electrically connected;
said C is21And the output end of D1Is electrically connected with the anode, C22And the output end of D2The anode is electrically connected.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A multi-input modular DC/DC converter is characterized by comprising an input module and a gain module, wherein the input module comprises a plurality of input end ports, and the gain module comprises a plurality of gain units; the output end of the input module is electrically connected with the input end of the gain module, and the gain is improved through the reasonable configuration of the port number of the input end and the gain unit.
2. A multi-input modular DC/DC converter as claimed in claim 1, wherein the input module comprises m input power sources Uin1、Uin2……UinmM power switches S1、S2……SmM inductors L1、L2……Lm(ii) a Wherein:
the input power supply Uin1Positive electrode and said inductor L1One end of the inductor L is electrically connected with the inductor1The other end andthe power switch S1The drain electrodes are respectively electrically connected with the input ends of the gain modules, and the power switch S1Source electrode is grounded, and the input power supply Uin1The negative electrode is electrically connected with the output end of the gain module;
the input power supply Uin2Positive pole and the power switch S2Drain electrode electrically connected to the power switch S2Source electrode and the inductor L2One end of the inductor L is electrically connected with the input end of the gain module respectively2The other end is grounded, and the input power supply Uin2The negative electrode is electrically connected with the output end of the gain module;
according to the above rule, the input power supply Uin(m-1)Positive electrode and said inductor Lm-1One end of the inductor L is electrically connected with the inductorm-1The other end and the power switch Sm-1The drain electrodes are respectively electrically connected with the input ends of the gain modules, and the power switch Sm-1Source electrode is grounded, and the input power supply Uin(m-1)The negative electrode is electrically connected with the output end of the gain module;
the input power supply UinmPositive pole and the power switch SmDrain electrode electrically connected to the power switch SmSource electrode and the inductor LmOne end of the inductor L is electrically connected with the input end of the gain module respectivelymThe other end is grounded, and the input power supply UinmThe negative electrode is electrically connected with the output end of the gain module.
3. A multi-input modular DC/DC converter as claimed in claim 2, characterized in that the m power switches S1、S2……SmAny one of the power switches S comprises a field effect transistor and a diode; the drain electrode of the field effect transistor is electrically connected with the cathode of the diode, and the source electrode of the field effect transistor is electrically connected with the anode of the diode; the drain electrode of the field effect transistor is the drain electrode of the power switch, and the source electrode of the field effect transistor is the source electrode of the power switch.
4. A multi-input modular DC/DC converter as claimed in claim 2, characterized in that the gain module comprises n gain cells, m diodes D1、D2……DmCapacitor C0And a resistance RL(ii) a Wherein: the output end of the input module is electrically connected with the input end of the 1 st gain unit, the n gain units are connected in series, and the output end of the n gain unit is connected with the m diodes D1、D2……DmM of the diodes D1、D2……DmM said diodes D connected in parallel1、D2……DmAnd the capacitor C0And a resistor RLOne end of the capacitor C is electrically connected with the other end of the capacitor C0Another terminal of (1) and a resistor RLThe other end of the power supply unit is respectively connected with m input power supplies Uin1、Uin2……UinmThe negative electrodes are electrically connected.
5. The multiple-input modular DC/DC converter as claimed in claim 4, wherein the n gain cells include a 1 st gain cell, a 2 nd gain cell … … n th gain cell, the 1 st gain cell including a capacitor C11、C12……C1mDiode D11、D12……D1mThe 2 nd gain unit comprises a capacitor C21、C22……C2mDiode D21、D22……D2mAnd so on, the nth gain unit comprises a capacitor Cn1、Cn2……CnmDiode Dn1、Dn2……Dnm；
Wherein: the capacitor C11、C21……Cn1Connected in series, said capacitor C12、C22……Cn2Series connection, and so on, the capacitor C1m、C2m……CnmAre connected in series;
in the 1 st gain cell, the capacitor C11And the diode D11The anode of the diode D is electrically connected with the anode of the diode11And the capacitor C12The output end of the capacitor C is electrically connected with the output end of the capacitor12And the diode D12The anode of the diode D is electrically connected with the anode of the diode12And the capacitor C13The output ends of the capacitors are electrically connected, and so on, the capacitor C1(m-1)And the diode D1(m-1)The anode of the diode D is electrically connected with the anode of the diode1(m-1)And the capacitor C1mThe output end of the capacitor C is electrically connected with the output end of the capacitor1mAnd the diode D1mThe anode of the diode D is electrically connected with the anode of the diode1mAnd the capacitor C11The output ends of the two ends are electrically connected;
in the 2 nd gain cell, the capacitor C21And the diode D21The anode of the diode D is electrically connected with the anode of the diode21And the capacitor C22The output end of the capacitor C is electrically connected with the output end of the capacitor22And the diode D22The anode of the diode D is electrically connected with the anode of the diode22And the capacitor C23The output ends of the capacitors are electrically connected, and so on, the capacitor C2(m-1)And the diode D2(m-1)The anode of the diode D is electrically connected with the anode of the diode2(m-1)And the capacitor C2mThe output end of the capacitor C is electrically connected with the output end of the capacitor2mAnd the diode D2mThe anode of the diode D is electrically connected with the anode of the diode2mAnd the capacitor C21The output ends of the two ends are electrically connected;
and so on, in the nth gain unit, the capacitor Cn1And the diode Dn1The anode of the diode D is electrically connected with the anode of the dioden1And the capacitor Cn2The output end of the capacitor C is electrically connected with the output end of the capacitorn2And the diode Dn2The anode of the diode D is electrically connected with the anode of the dioden2And the capacitor Cn3Output terminal of (2)Sex connection, and so on, the capacitor Cn(m-1)And the diode Dn(m-1)The anode of the diode D is electrically connected with the anode of the dioden(m-1)And the capacitor CnmThe output end of the capacitor C is electrically connected with the output end of the capacitornmAnd the diode DnmThe anode of the diode D is electrically connected with the anode of the diodenmAnd the capacitor Cn1The output ends of the two ends are electrically connected.
6. A multi-input modular DC/DC converter as claimed in claim 4, characterized in that the power switch S1Drain electrode of (1) and C11Is electrically connected with the input terminal of the power switch S2Source and C of12The input terminals of the power switch S are electrically connected, and so on, the power switch Sm-1Drain electrode of (1) and C1(m-1)Is electrically connected with the input terminal of the power switch SmSource and C of1mThe input ends are electrically connected;
said C isn1And the output end of D1Is electrically connected with the anode, Cn2And the output end of D2The anode of (A) is electrically connected, and so on, the step (C)nmAnd the output end of DmThe anode is electrically connected.
7. A multiple-input modular DC/DC converter as claimed in claim 1, wherein m said input power sources Uin1、Uin2……UinmAre all low-voltage input power supplies.
8. A multi-input modular DC/DC converter as claimed in claim 2, wherein m of said inductors L1、L2……LmAre all filter inductors.
9. A multi-input modular DC/DC converter as claimed in claim 4, characterized in that the capacitor C0Is a filter capacitor.
10. A multiple-input modular DC/DC converter as claimed in claim 4, characterized in that m of said diodes D1、D2……DmAre all rectifier filter diodes.
CN201911306503.0A 2019-12-18 2019-12-18 Multi-input modular DC/DC converter Pending CN110932544A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106026657A (en) * 2016-07-08 2016-10-12 西华大学 Non-isolated high-gain DC-DC boost converter
CN106655774A (en) * 2016-12-29 2017-05-10 三峡大学 Multi-input high-gain DC/DC converter
CN106787723A (en) * 2016-12-29 2017-05-31 三峡大学 A kind of multi input boosting DC/DC converters high
CN211579878U (en) * 2019-12-18 2020-09-25 广东电网有限责任公司 Multi-input modular DC/DC converter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106026657A (en) * 2016-07-08 2016-10-12 西华大学 Non-isolated high-gain DC-DC boost converter
CN106655774A (en) * 2016-12-29 2017-05-10 三峡大学 Multi-input high-gain DC/DC converter
CN106787723A (en) * 2016-12-29 2017-05-31 三峡大学 A kind of multi input boosting DC/DC converters high
CN211579878U (en) * 2019-12-18 2020-09-25 广东电网有限责任公司 Multi-input modular DC/DC converter

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