CN110994992A - Expandable gain unit type high-capacity DC/DC converter - Google Patents

Expandable gain unit type high-capacity DC/DC converter Download PDF

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Publication number
CN110994992A
CN110994992A CN201911306711.0A CN201911306711A CN110994992A CN 110994992 A CN110994992 A CN 110994992A CN 201911306711 A CN201911306711 A CN 201911306711A CN 110994992 A CN110994992 A CN 110994992A
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China
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gain
port
electrically connected
input
gain unit
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CN201911306711.0A
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Chinese (zh)
Inventor
刘崧
武利会
曾庆辉
刘少辉
陈贤熙
范心明
唐琪
黎小龙
梁年柏
李�浩
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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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Priority to CN201911306711.0A priority Critical patent/CN110994992A/en
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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
    • 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
    • H02M3/158—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 including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—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 including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • 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
    • H02M3/158—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 including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—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 including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • H02M3/1586—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 including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved

Abstract

The invention relates to an expandable gain unit type high-capacity 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 different voltage and current stresses are adapted by adjusting different numbers of input end ports and gain units. The invention provides an expandable gain unit type high-capacity DC/DC converter, which utilizes a voltage-multiplying unit capacitor with voltage gradually increased to realize high boosting capacity, can boost basic gain of more than several times on the basis of the altitude every time the number of input phases or the number of gain units is increased, and obtains lower voltage and current stress of an active device by adjusting the number of the input phases and the number of the gain units.

Description

Expandable gain unit type high-capacity DC/DC converter
Technical Field
The invention relates to the field of converters, in particular to an expandable gain unit type high-capacity DC/DC converter.
Background
In the prior art, researches on a DC/DC converter applied to a large-scale boosting occasion are less, the input and output gains of most converters are fixed, the expansibility is poor, and the defects of complex control strategy, low energy transmission efficiency and the like cause the converter to be limited in application occasions such as offshore wind power and the like; there are three main types of converters studied for this problem: firstly, utilize switch resonance electric capacity to pass through the resonance and realize high-gain, also reduce power device's voltage stress simultaneously, but this method expansibility is relatively poor, and the structure is complicated, and required switching device is more, and the higher energy transmission efficiency of system's loss is not high. 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 an expandable gain unit type high-capacity DC/DC converter, aiming at solving the problems that a gain unit of the existing converter cannot be effectively expanded and has small capacity.
In order to realize the purpose, the technical scheme is as follows:
an expandable gain unit type high-capacity 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 different voltage and current stresses are adapted by adjusting different numbers of input end ports and gain units.
The input module comprises an input power supply UinM power switches S1、S2……SmM inductors L1、L2……Lm(ii) a Wherein:
the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module;
the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module;
according to the above rule, the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module;
the input power supply UinPositive pole and the power switch SmDrain electrode electrically connected to the power switch SmSource electrode andthe inductance 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 UinThe 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 nm gain units and a resistor RL(ii) a Wherein: the gain unit comprises a first port, a second port and a third port, and the power switch S1A drain electrically connected to the first port … … of the 1 st gain cell, the third port of the mth gain cell and the third port of the (n-1) th gain cell, respectively, and the power switch S2A source electrode is electrically connected to the third port … … of the 1 st gain cell, the third port of the m +1 th gain cell and the third port of the (n-1) th m +1 th gain cell, and so on, and the power switch Sm-1A drain electrode electrically connected to the third port … … of the m-2 th gain unit, the third port of the 2m-2 th gain unit and the third port of the nm-2 th gain unit, respectively, and the power switch SmThe source is electrically connected to the third port … … of the m-1 th gain cell, the third port of the 2m-1 th gain cell and the third port of the nm-1 th gain cell, respectively;
a second port of the 1 st gain unit is electrically connected to a first port of the 2 nd gain unit, a second port of the 2 nd gain unit is electrically connected to a first port of the 3 rd gain unit, and so on, a second port of the nm-2 nd gain unit is electrically connected to a first port of the nm-1 th gain unit, and a second port of the nm-1 th gain unit is electrically connected to a first port of the nm-1 th gain unit; the second port of the nm gain unit and the resistor RLOne end is electrically connected withA third port of the nm gain unit and the resistor RLThe other end is respectively connected with the input power supply UinThe negative electrodes are electrically connected.
Any one of the nm gain units comprises a diode D and a capacitor C; the cathode of the diode D is electrically connected with one end of the capacitor C, the anode of the diode D is a first port, the junction of the cathode of the diode D and the capacitor C is a second port, and the other end of the capacitor C is a third port.
The resistor RLThe voltage at both ends is set as the output voltage U0The ratio of the output voltage to the input voltage is:
Figure BDA0002323350110000031
m and n are gain unit parameters, and D is a diode parameter.
The input power supply UinIs a low voltage input power supply.
m said inductors L1、L2……LmAre all filter inductors.
The capacitor C0……Cnm-1Are all filter capacitors.
The diode D0……Dnm-1Are all rectifier filter diodes.
m power switches S1～SmThe grid electrode of the voltage boosting circuit is connected with a PWM wave control signal of the same controller, high boosting capacity is realized by utilizing a voltage-multiplying unit capacitor with voltage gradually boosted, basic gain which is more than several times of the basic gain on the basis can be increased when an input phase number or a gain unit number is increased, and the ratio of output voltage to input voltage is as follows:
Figure BDA0002323350110000032
the converter adopts the synchronous control of the switching tubes, so that the complexity of the design of a control system can be effectively reduced; compared with other interleaved parallel type converters, the duty ratio of the converter is not limited to D >0.5, and lower voltage and current stress of active devices can be obtained by adjusting the number of input phases and the number of gain units.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an expandable gain unit type high-capacity DC/DC converter, which utilizes a voltage-multiplying unit capacitor with voltage gradually increased to realize high boosting capacity, can boost basic gain of more than several times on the basis of the altitude every time the number of input phases or the number of gain units is increased, and obtains lower voltage and current stress of an active device by adjusting the number of the input phases and the number of the gain units.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a circuit topology diagram of the circuit of the present invention with 8 gain cells for 4 input phases;
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, an expandable gain unit type large-capacity DC/DC converter includes an input module and a gain module, where 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 different voltage and current stresses are adapted by adjusting different numbers of input end ports and gain units.
The input module comprises an input power supply UinM power switches S1、S2……SmM inductors L1、L2……Lm(ii) a Wherein:
the input power supply UinPositive 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 UinCathode and the gain moduleThe output ends of the two ends are electrically connected;
the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module;
according to the above rule, the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module;
the input power supply UinPositive 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 UinThe 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 nm gain units and a resistor RL(ii) a Wherein: the gain unit comprises a first port, a second port and a third port, and the power switch S1A drain electrically connected to the first port … … of the 1 st gain cell, the third port of the mth gain cell and the third port of the (n-1) th gain cell, respectively, and the power switch S2Source and 1 st gain cellThe third port … … of the (m + 1) th gain unit and the third port of the (n-1) th m +1 gain unit are electrically connected, and so on, the power switch Sm-1A drain electrode electrically connected to the third port … … of the m-2 th gain unit, the third port of the 2m-2 th gain unit and the third port of the nm-2 th gain unit, respectively, and the power switch SmThe source is electrically connected to the third port … … of the m-1 th gain cell, the third port of the 2m-1 th gain cell and the third port of the nm-1 th gain cell, respectively;
a second port of the 1 st gain unit is electrically connected to a first port of the 2 nd gain unit, a second port of the 2 nd gain unit is electrically connected to a first port of the 3 rd gain unit, and so on, a second port of the nm-2 nd gain unit is electrically connected to a first port of the nm-1 th gain unit, and a second port of the nm-1 th gain unit is electrically connected to a first port of the nm-1 th gain unit; the second port of the nm gain unit and the resistor RLOne end of the nm gain unit is electrically connected with the third port of the resistor RLThe other end is respectively connected with the input power supply UinThe negative electrodes are electrically connected.
Any one of the nm gain units comprises a diode D and a capacitor C; the cathode of the diode D is electrically connected with one end of the capacitor C, the anode of the diode D is a first port, the junction of the cathode of the diode D and the capacitor C is a second port, and the other end of the capacitor C is a third port.
The resistor RLThe voltage at both ends is set as the output voltage U0The ratio of the output voltage to the input voltage is:
Figure BDA0002323350110000051
m and n are gain unit parameters, and D is a diode parameter.
m power switches S1～SmThe grid of the voltage boosting unit is connected with a PWM (pulse-width modulation) wave control signal of the same controller, and high boosting capacity is realized by utilizing a voltage-multiplying unit capacitor with voltage increased step by step, wherein each time the number of input phases is increased or one phase is increasedThe number of the beneficial units can be increased to more than several times of basic gain on the basis of the altitude, and the ratio of the output voltage to the input voltage is as follows:
Figure BDA0002323350110000052
the converter adopts the synchronous control of the switching tubes, so that the complexity of the design of a control system can be effectively reduced; compared with other interleaved parallel type converters, the duty ratio of the converter is not limited to D >0.5, and lower voltage and current stress of active devices can be obtained by adjusting the number of input phases and the number of gain units.
Example 2
As shown in fig. 2, an expandable gain unit type large-capacity DC/DC converter includes an input module and a gain module, where 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 different voltage and current stresses are adapted by adjusting different numbers of input end ports and gain units.
The input module comprises an input power supply UinPower switch S1、S2、S3And S4Inductance L1、L2、L3And L4(ii) a Wherein:
the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module;
the input power supply UinPositive 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 UinA negative electrode and an output end of the gain moduleElectrically connecting;
the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module;
the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module.
The 4 power switches 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 8 gain units and a resistor RL(ii) a Wherein: the gain unit comprises a first port, a second port and a third port, and the power switch S1A drain electrode electrically connected to the first port of the 1 st gain unit and the third port of the 4 th gain unit, respectively, and the power switch S2A source electrode is electrically connected with the third port of the 1 st gain unit and the third port of the 5 th gain unit respectively, and the power switch S3A drain electrode electrically connected to the third port of the No. 2 gain unit and the third port of the No. 6 gain unit, respectively, and the power switch S4The source electrode is electrically connected with the third port of the 3 rd gain unit and the third port of the 7 th gain unit respectively;
the second port of the 1 st gain unit is electrically connected with the first port of the 2 nd gain unitA second port of the 2 nd gain unit is electrically connected to a first port of the 3 rd gain unit, and so on, a second port of the 6 th gain unit is electrically connected to a first port of the 7 th gain unit, and a second port of the 7 th gain unit is electrically connected to a first port of the 8 th gain unit; the second port of the 8 th gain cell and the resistor RLOne end of the 8 th gain unit is electrically connected with the resistor RLThe other end is respectively connected with the input power supply UinThe negative electrodes are electrically connected.
Any one of the 8 gain units comprises a diode D and a capacitor C; the cathode of the diode D is electrically connected with one end of the capacitor C, the anode of the diode D is a first port, the junction of the cathode of the diode D and the capacitor C is a second port, and the other end of the capacitor C is a third port. Four power switches S1、S2、S3、S4The gates of which are connected to the same PWM controller.
According to the different states of the power switch, the circuit can be divided into two working states:
(1) power switch S1～S4Are all conducted, inductance L1～L4The current rises gradually, and the low-voltage power supply passes through the power switch S2Diode D2Power switch S3To the capacitor C2Charging, to C1Discharge through diode D6To a capacitor C6Charging, to C5Discharging; at the same time, the low-voltage power supply passes through a power switch S4Diode D4Power switch S1To the capacitor C4Charging, to C3Discharge through diode DoCapacitor C7Discharge to the filter capacitor CoCharging while simultaneously applying a voltage to a load RLSupplying power; diode D1、D3、D5、D7Are all turned off.
(2) The controller controls the power switch S1～S4All turn off, inductance L1～L4The current gradually decreases, and the low-voltage power supply passes through the inductor L1Diode D1Inductor L2To the capacitor C1Charging through diode D5To the capacitor C5Charging the capacitor C4Discharging; at the same time, the low-voltage power supply passes through an inductor L3Diode D3Inductor L4To the capacitor C3Charging, to C2Discharge through diode D7Capacitor C5Discharge to the capacitor C7Charging, diode D2、D4、D6、DoAre all turned off.
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 large capacity DC/DC converter of the unit type of the expandable gain, characterized by that: the device 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 different voltage and current stresses are adapted by adjusting different numbers of input end ports and gain units.
2. The large-capacity DC/DC converter of the extended gain unit type as set forth in claim 1, wherein: the input module comprises an input power supply UinM power switches S1、S2……SmM inductors L1、L2……Lm(ii) a Wherein:
the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module;
the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module;
according to the above rule, the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module;
the input power supply UinPositive 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 UinThe negative electrode is electrically connected with the output end of the gain module.
3. The large-capacity DC/DC converter of the extended gain unit type as set forth in claim 2, wherein: 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. Root of herbaceous plantA large capacity DC/DC converter of an extended gain unit type according to claim 3, wherein: the gain module comprises nm gain units and a resistor RL(ii) a Wherein: the gain unit comprises a first port, a second port and a third port, and the power switch S1A drain electrically connected to the first port … … of the 1 st gain cell, the third port of the mth gain cell and the third port of the (n-1) th gain cell, respectively, and the power switch S2A source electrode is electrically connected to the third port … … of the 1 st gain cell, the third port of the m +1 th gain cell and the third port of the (n-1) th m +1 th gain cell, and so on, and the power switch Sm-1A drain electrode electrically connected to the third port … … of the m-2 th gain unit, the third port of the 2m-2 th gain unit and the third port of the nm-2 th gain unit, respectively, and the power switch SmThe source is electrically connected to the third port … … of the m-1 th gain cell, the third port of the 2m-1 th gain cell and the third port of the nm-1 th gain cell, respectively; a second port of the 1 st gain unit is electrically connected to a first port of the 2 nd gain unit, a second port of the 2 nd gain unit is electrically connected to a first port of the 3 rd gain unit, and so on, a second port of the nm-2 nd gain unit is electrically connected to a first port of the nm-1 th gain unit, and a second port of the nm-1 th gain unit is electrically connected to a first port of the nm-1 th gain unit; the second port of the nm gain unit and the resistor RLOne end of the nm gain unit is electrically connected with the third port of the resistor RLThe other end is respectively connected with the input power supply UinThe negative electrodes are electrically connected.
5. The large-capacity DC/DC converter with the expandable gain unit type according to claim 4, wherein: any one of the nm gain units comprises a diode D and a capacitor C; the cathode of the diode D is electrically connected with one end of the capacitor C, the anode of the diode D is a first port, the junction of the cathode of the diode D and the capacitor C is a second port, and the other end of the capacitor C is a third port.
6. The large-capacity DC/DC converter with the expandable gain unit type according to claim 4, wherein: the resistor RLThe voltage at both ends is set as the output voltage U0The ratio of the output voltage to the input voltage is:
Figure FDA0002323350100000021
m and n are gain unit parameters, and D is a diode parameter.
7. The large-capacity DC/DC converter with extended gain unit of claim 1, wherein the input power U is connected to the DC/DC converterinIs a low voltage input power supply.
8. A large capacity DC/DC converter with extended gain unit as claimed in claim 2, wherein m said inductors L1、L2……LmAre all filter inductors.
9. The large-capacity DC/DC converter with extended gain unit of claim 4, wherein the capacitor C is connected to the DC/DC converter0……Cnm-1Are all filter capacitors.
10. A large capacity DC/DC converter with extended gain unit as claimed in claim 4, wherein the diode D0……Dnm-1Are all rectifier filter diodes.
CN201911306711.0A 2019-12-18 2019-12-18 Expandable gain unit type high-capacity DC/DC converter Pending CN110994992A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112701923A (en) * 2020-12-25 2021-04-23 三峡大学 Novel high-gain Zeta DC-DC converter
CN112737324A (en) * 2020-12-25 2021-04-30 三峡大学 Automatic voltage-sharing bipolar Zeta DC-DC converter
CN112737332A (en) * 2020-12-25 2021-04-30 三峡大学 Automatic voltage-sharing bipolar Cuk DC-DC converter
CN112737331A (en) * 2020-12-25 2021-04-30 三峡大学 Automatic voltage-equalizing bipolar buck-boost DC-DC converter
CN112737330A (en) * 2020-12-25 2021-04-30 三峡大学 Novel high-gain Buck-Boost DC-DC converter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112701923A (en) * 2020-12-25 2021-04-23 三峡大学 Novel high-gain Zeta DC-DC converter
CN112737324A (en) * 2020-12-25 2021-04-30 三峡大学 Automatic voltage-sharing bipolar Zeta DC-DC converter
CN112737332A (en) * 2020-12-25 2021-04-30 三峡大学 Automatic voltage-sharing bipolar Cuk DC-DC converter
CN112737331A (en) * 2020-12-25 2021-04-30 三峡大学 Automatic voltage-equalizing bipolar buck-boost DC-DC converter
CN112737330A (en) * 2020-12-25 2021-04-30 三峡大学 Novel high-gain Buck-Boost DC-DC converter
CN112737330B (en) * 2020-12-25 2022-02-01 三峡大学 High-gain Buck-Boost DC-DC converter

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