CN115051563B - Multiple ultra-high voltage gain DC-DC converter - Google Patents
Multiple ultra-high voltage gain DC-DC converter Download PDFInfo
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- CN115051563B CN115051563B CN202210675655.3A CN202210675655A CN115051563B CN 115051563 B CN115051563 B CN 115051563B CN 202210675655 A CN202210675655 A CN 202210675655A CN 115051563 B CN115051563 B CN 115051563B
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- 238000010586 diagram Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
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- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Classifications
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A multiple ultra-high voltage gain DC-DC converter includes a basic Boost and n multiple expansion units. The multiple expansion units are composed of an inductor, a capacitor and two diodes, and the input and output gains of the converter can be adjusted by adjusting the number of the multiple expansion units. The converter has the characteristics of simple control and driving circuit, high input and output voltage gain and high reliability; is suitable for the application occasions with low input voltage, large output voltage and high reliability requirement.
Description
Technical Field
The invention relates to a DC-DC converter, in particular to a multi-time ultra-high voltage gain DC-DC converter.
Background
In applications where the power is partially low, such as wind, photovoltaic power generation, and electrical isolation is not required, non-isolated DC-DC converters are often used to Boost the input voltage to meet the load or bus requirements, where the most common non-isolated Boost DC-DC converter is a Boost converter. Theoretically, by adjusting the duty cycle D, the output gain of these converters can be varied from zero to infinity, but the boost capability of these converters is greatly limited by the parasitic parameters of the components and circuits.
At present, a scheme for improving the gain of the input and output voltage of the DC-DC converter is mostly constructed by adopting a basic Boost circuit, a switch capacitor, a switch inductor and the like, but the boosting capacity is still lower, and the situation of extreme duty ratio can occur when the ultra-high voltage gain is applied, so that the efficiency can be drastically reduced. Therefore, research on the realization of the ultra-high voltage gain boost DC/DC converter is of great significance.
Disclosure of Invention
In order to solve the problem that the voltage gain of the existing non-isolated high-gain DC-DC converter is not high, the invention provides a multi-time ultrahigh-voltage gain DC-DC converter which consists of a basic Boost and a plurality of multi-time expansion units. And when the one-stage multiple expansion unit is added, the number of times of the denominator of the input and output voltage gain coefficient is increased once compared with that of the traditional Boost voltage gain coefficient, so that the output voltage is greatly improved under the condition of unchanged duty ratio. The converter has the characteristics of simple control and driving circuit, high output voltage gain and high reliability; the method is suitable for the application occasions with high output voltage gain requirements and high reliability requirements.
The technical scheme adopted by the invention is as follows:
A multiple ultra-high voltage gain DC-DC converter, the converter comprising:
a Boost converter, n multiple expansion units;
The Boost converter comprises an inductor L 1, a power switch S, a diode D 0 and a capacitor C 0;
The positive electrode of the direct current power supply u in is connected with one end of the inductor L 1, and the negative electrode of the direct current power supply u in is respectively connected with the source electrode of the power switch S and the other end of the capacitor C 0; one end of the capacitor C 0 is connected with the cathode of the diode D 0, and the anode of the diode D 0 is connected with the drain electrode of the power switch S;
The first multiple expansion unit comprises a diode D 11、D12, a capacitor C 11 and an inductor L 11;
The other end of the inductor L 1 is respectively connected with the anode of the diode D 11 and the anode of the diode D 12; the cathode of the diode D 12 is respectively connected with the other end of the capacitor C 11 and one end of the inductor L 11; one end of the capacitor C 11 is connected with the source electrode of the power switch S; the cathode of the diode D 11 is connected with the drain electrode of the power switch S;
the second multiple expansion unit comprises a diode D 21、D22, a capacitor C 21 and an inductor L 21;
The other end of the inductor L 11 is respectively connected with the anode of the diode D 21 and the anode of the diode D 22; the cathode of the diode D 22 is respectively connected with the other end of the capacitor C 21 and one end of the inductor L 21; one end of the capacitor C 21 is connected with the source electrode of the power switch S; the cathode of the diode D 21 is connected with the drain electrode of the power switch S;
....analogy, n > 2,
The n-1 th multiple expansion unit comprises a diode D (n-1)1、D(n-1)2, a capacitor C (n-1)1 and an inductor L (n-1)1;
The other end of the inductor L (n-2)1 is respectively connected with the anode of the diode D (n-1)1 and the anode of the diode D (n-1)2; the cathode of the diode D (n-1)2 is respectively connected with the other end of the capacitor C (n-1)1 and one end of the inductor L (n-1)1; one end of the capacitor C (n-1)1 is connected with the source electrode of the power switch S; the cathode of the diode D (n-1)1 is connected with the drain electrode of the power switch S;
The nth multiple expansion unit comprises a diode D n1、Dn2, a capacitor C n1 and an inductor L n1;
The other end of the inductor L (n-1)1 is provided with a diode D n1 anode and a diode D n2 anode respectively; the cathode of the diode D n2 is respectively connected with the other end of the capacitor C n1 and one end of the inductor L n1; one end of the capacitor C n1 is connected with the source electrode of the power switch S; the cathode of the diode D n1 is connected with the drain electrode of the power switch S;
The two ends of the load R are respectively connected with one end of the capacitor C 0 and the other end of the capacitor C 0.
The grid electrode of the power switch S is connected with the controller, the duty ratio of the power switch S can be changed between 0 and 1, and when the expansion unit is added for one-level times, the gain coefficient of the input and output voltage is increased once compared with the denominator times of the gain coefficient of the voltage of the traditional Boost, so that the output voltage of the converter is greatly improved.
When the number of the multiple expansion units is 2, the circuit can be divided into 2 working states according to different power switch states when the current of the inductor L 1、L11、L21 is continuously conducted:
(1) The power switch S is turned on, the diode D 12、D22、D0 is turned off, the inductor L 1、L11、L21 is charged, and the capacitor C 11、C21 is discharged. The inductor L 1、L11、L21 terminal voltage is as follows:
(2) The power switch S is turned off, the diodes D 12、D22、D0 are all turned on, at this time, the inductor L 1、L11、L21 is all discharged, and the capacitor C 11、C21 is charged. The inductor L 1、L11、L21 terminal voltage is as follows:
Taking 2 multiple expansion units as an example:
A multiple ultra-high voltage gain DC-DC converter, the converter comprising:
A Boost converter, 2 multiple expansion units;
The Boost converter comprises an inductor L 1, a power switch S, a diode D 0 and a capacitor C 0;
The positive electrode of the direct current power supply u in is connected with one end of the inductor L 1, and the negative electrode of the direct current power supply u in is respectively connected with the source electrode of the power switch S and the other end of the capacitor C 0; one end of the capacitor C 0 is connected with the cathode of the diode D 0, and the anode of the diode D 0 is connected with the drain electrode of the power switch S;
The first multiple expansion unit comprises a diode D 11、D12, a capacitor C 11 and an inductor L 11;
The other end of the inductor L 1 is respectively connected with the anode of the diode D 11 and the anode of the diode D 12; the cathode of the diode D 12 is respectively connected with the other end of the capacitor C 11 and one end of the inductor L 11; one end of the capacitor C 11 is connected with the source electrode of the power switch S; the cathode of the diode D 11 is connected with the drain electrode of the power switch S;
the second multiple expansion unit comprises a diode D 21、D22, a capacitor C 21 and an inductor L 21;
The other end of the inductor L 11 is respectively connected with the anode of the diode D 21 and the anode of the diode D 22; the cathode of the diode D 22 is respectively connected with the other end of the capacitor C 21 and one end of the inductor L 21; one end of the capacitor C 21 is connected with the source electrode of the power switch S; the cathode of the diode D 21 is connected with the drain electrode of the power switch S;
The two ends of the load R are respectively connected with one end of the capacitor C 0 and the other end of the capacitor C 0.
The invention relates to a multiple ultra-high voltage gain DC-DC converter, which has the following technical effects:
1) And the number of times of the input and output voltage gain coefficient of each stage of the multi-time expansion unit is increased once compared with the number of times of the denominator of the voltage gain coefficient of the traditional Boost, so that the output voltage is greatly improved under the condition of unchanged duty ratio. The method comprises the following steps:
when n gain expansion units are used,
Voltage gain:
The voltage stress of the switching tube is as follows:
The voltage on the output capacitor is:
Wherein: for the D duty cycle, u in is the input voltage, u S is the power switch voltage stress, and u C0 is the voltage stress of the output capacitor.
2) The DC-DC converter only uses one power switch, and has simple control and low cost.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is a schematic diagram of a basic Boost converter circuit.
Fig. 3 is a circuit topology diagram of the present invention when the number of multiple expansion units is 2.
Fig. 4 is a graph comparing the input/output gain of the multiple expansion unit number of 2 with the input/output gain of the basic Boost converter.
Fig. 5 is a simulation diagram of an output waveform when d=0.6 for an input voltage of 30V and the number of multiple expansion units of the present invention is 2.
Detailed Description
As shown in fig. 1, a multiple ultra-high voltage gain DC-DC converter comprises a basic Boost converter and n multiple expansion units. Wherein:
As shown in fig. 2, the basic Boost converter includes an inductance L 1, a power switch S, a diode D 0, and a capacitance C 0; the connection form is as follows: one end of an inductor L 1 is connected with the positive electrode of the direct-current power supply u in, the anode of a diode D 0 is connected with the drain electrode of the power switch S, the cathode of the diode D 0 is connected with one end of a capacitor C 0, and the other end of the capacitor C 0 is connected with the source electrode of the power switch S and the negative electrode of the direct-current power supply u in;
The first multiple expansion unit comprises two diodes D 11、D12, a capacitor C 11 and an inductor L 11; the anode of the diode D 11 is connected with the anode of the D 12, the cathode of the diode D 12 is respectively connected with one end of the capacitor C 11 and one end of the inductor L 11, and the other end of the capacitor C 11 is connected with the cathode of the direct current power supply u in;
The second multiple expansion unit comprises two diodes D 21、D22, a capacitor C 21 and an inductor L 21; the anode of the diode D 21 is connected with the anode of the D 22, the cathode of the diode D 22 is respectively connected with one end of the capacitor C 21 and one end of the inductor L 21, and the other end of the capacitor C 21 is connected with the cathode of the direct current power supply u in;
.. analogizes to the above,
The nth multiple expansion unit comprises two diodes D n1、Dn2, a capacitor C n1 and an inductor L n1; the anode of the diode D n1 is connected with the anode of the D n2, the cathode of the diode D n2 is respectively connected with one end of the capacitor C n1 and one end of the inductor L n1, and the other end of the capacitor C n1 is connected with the cathode of the direct current power supply u in;
The connection relationship between the first multiple expansion unit and the basic Boost converter is as follows:
The intersection point of the anode of the diode D 11 and the anode of the diode D 12 of the first multiple expansion unit is connected with one end of the inductor L 1 of the basic Boost, the cathode of the diode D 11 is connected with the drain electrode of the power switch S of the basic Boost and the anode of the diode D 0, and the other end of the capacitor C 11 of the first multiple expansion unit is respectively connected with the cathode of the direct-current power supply u in, the source electrode of the power switch S, one end of the capacitor C 0 and one end of the load R;
the connection relationship between the respective multiple expansion units is as follows:
The cathode of the diode D (n-1)1 in the n-1 multiple expansion unit is connected with the cathode of the diode D n1 in the n-1 multiple expansion unit, the inductor L (n-1)1 in the n-1 multiple expansion unit is connected with the intersection point of the anode of the diode D n1 and the anode of the diode D n2 in the n-1 multiple expansion unit, and the capacitor C (n-1)1 in the n-1 multiple expansion unit is connected with the capacitor C n1 in the n multiple expansion unit.
One end of the load R is connected with the cathode of the basic Boost diode D 0 and one end of the capacitor C 0, and the other end of the load R is connected with the other end of the capacitor C 0, the source electrode of the power switch, the other end of the multiple expansion unit capacitor C 11、C21……Cn1 and the negative electrode of the direct current power supply u in respectively.
The grid electrode of the power switch S is connected with the controller, the duty ratio of the power switch S can be changed between 0 and 1, and when the expansion unit is added for one-level times, the gain coefficient of the input and output voltage is increased once compared with the denominator times of the gain coefficient of the voltage of the traditional Boost, so that the output voltage of the converter is greatly improved.
When the number of the multiple expansion units is 2, the circuit can be divided into 2 working states according to different power switch states when the current of the inductor L 1、L11、L21 is continuously conducted:
(1): the power switch S is turned on, the diode D 12、D22、D0 is turned off, the inductor L 1、L11、L21 is charged, and the capacitor C 11、C21 is discharged. The inductor L 1、L11、L21 terminal voltage is as follows:
(2): the power switch S is turned off, the diodes D 12、D22、D0 are all turned on, at this time, the inductor L 1、L11、L21 is all discharged, and the capacitor C 11、C21 is charged. The inductor L 1、L11、L21 terminal voltage is as follows:
Examples:
as shown in fig. 3, a circuit topology diagram of the present invention when the number of the multiple expansion units is 2 is shown: the converter comprises a basic Boost and n gain expansion units. Wherein:
The basic Boost converter comprises an inductor L 1, a power switch S, a diode D 0 and a capacitor C 0; one end of the inductor L 1 is connected with the positive electrode of the direct-current power supply u in, and the other end of the inductor L 1 is connected with the first multiple expansion unit; the anode of the diode D 0 is connected with the drain electrode of the power switch S, and the other end of the diode D 0 is respectively connected with the capacitor C 0 and the load R.
The first multiple expansion unit comprises two diodes D 11、D12, a capacitor C 11 and an inductor L 11; the anode of the diode D 11 is connected with the anode of the D 12, the cathode of the diode D 12 is respectively connected with one end of the capacitor C 11 and one end of the inductor L 11, and the other end of the capacitor C 11 is connected with the cathode of the direct current power supply u in;
The second multiple expansion unit comprises two diodes D 21、D22, a capacitor C 21 and an inductor L 21; the anode of the diode D 21 is connected with the anode of the D 22, the cathode of the diode D 22 is respectively connected with one end of the capacitor C 21 and one end of the inductor L 21, and the other end of the capacitor C 21 is connected with the cathode of the direct current power supply u in;
The connection relationship between the first multiple expansion unit and the basic Boost converter is as follows:
The intersection point of the diode D 11 and the anode of the diode D 12 of the first multiple expansion unit is connected with one end of the inductor L 1 of the basic Boost, the cathode of the diode D 11 is connected with the drain electrode of the power switch S of the basic Boost and the anode of the diode D 0, and the other end of the capacitor C 11 of the first multiple expansion unit is respectively connected with the cathode of the direct current power supply u in, the source electrode of the power switch S, one end of the capacitor C 0 and one end of the load R.
The connection relationship between the respective multiple expansion units is as follows:
The cathode of the diode D (n-1)1 in the n-1 multiple expansion unit is connected with the cathode of the diode D n1 in the n-1 multiple expansion unit, the inductor L (n-1)1 in the n-1 multiple expansion unit is connected with the intersection point of the anode of the diode D n1 and the anode of the diode D n2 in the n-1 multiple expansion unit, and the capacitor C (n-1)1 in the n-1 multiple expansion unit is connected with the capacitor C n1 in the n multiple expansion unit.
One end of the load R is connected with the intersection point of the cathode of the diode D 0 of the basic Boost converter and the capacitor C 0, and the other end of the load R is connected with the other end of the capacitor C 0, the source electrode of the power switch, the other end of the expansion unit capacitor C 11、C21……Cn1 and the negative electrode of the direct current power supply u in respectively.
The gate of the power switch S is connected to its controller and its duty cycle can vary between 0 and 1. The power switch on-off time 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.
When the current of the inductor L 1、L11、L21 is continuously conducted, the circuit can be divided into 2 working states according to different power switch states:
(1) The power switch S is turned on, the diode D 12、D22、D0 is turned off, the inductor L 1、L11、L21 is charged, and the capacitor C 11、C21 is discharged. The inductor L 1、L11、L21 terminal voltage is as follows:
(2) The power switch S is turned off, the diodes D 12、D22、D0 are all turned on, at this time, the inductor L 1、L11、L21 is all discharged, and the capacitor C 11、C21 is charged. The inductor L 1、L11、L21 terminal voltage is as follows:
From the duty cycle of the controller connected to the gate of the power switch S, the voltage level across each capacitor is derived as follows:
Fig. 4 is a graph showing the comparison of the input/output gain of the multiple expansion unit number of the present invention with the input/output gain of the Boost converter when the multiple expansion unit number is 2. It can be found that the voltage gain simulation result of the proposed converter is consistent with the theoretical calculation result, and the voltage gain of the proposed converter is much higher than that of the conventional Boost converter.
Fig. 5 is a simulation diagram of the output waveform when the number of gain expansion units is 2 and d=0.6 when the input voltage is 30V. The output voltage is 156V, which is consistent with the theoretical calculation result and has extremely small output voltage ripple, thus being capable of meeting most of application occasions requiring a high-gain DC-DC converter.
Claims (4)
1.A multiple ultra-high voltage gain DC-DC converter, the converter comprising:
a Boost converter, n multiple expansion units;
The Boost converter comprises an inductor L 1, a power switch S, a diode D 0 and a capacitor C 0;
The positive electrode of the direct current power supply u in is connected with one end of the inductor L 1, and the negative electrode of the direct current power supply u in is respectively connected with the source electrode of the power switch S and the other end of the capacitor C 0; one end of the capacitor C 0 is connected with the cathode of the diode D 0, and the anode of the diode D 0 is connected with the drain electrode of the power switch S;
The first multiple expansion unit comprises a diode D 11、D12, a capacitor C 11 and an inductor L 11;
The other end of the inductor L 1 is respectively connected with the anode of the diode D 11 and the anode of the diode D 12; the cathode of the diode D 12 is respectively connected with the other end of the capacitor C 11 and one end of the inductor L 11; one end of the capacitor C 11 is connected with the source electrode of the power switch S; the cathode of the diode D 11 is connected with the drain electrode of the power switch S;
the second multiple expansion unit comprises a diode D 21、D22, a capacitor C 21 and an inductor L 21;
The other end of the inductor L 11 is respectively connected with the anode of the diode D 21 and the anode of the diode D 22; the cathode of the diode D 22 is respectively connected with the other end of the capacitor C 21 and one end of the inductor L 21; one end of the capacitor C 21 is connected with the source electrode of the power switch S; the cathode of the diode D 21 is connected with the drain electrode of the power switch S;
....analogy, n > 2,
The n-1 th multiple expansion unit comprises a diode D (n-1)1、D(n-1)2, a capacitor C (n-1)1 and an inductor L (n-1)1;
The other end of the inductor L (n-2)1 is respectively connected with the anode of the diode D (n-1)1 and the anode of the diode D (n-1)2; the cathode of the diode D (n-1)2 is respectively connected with the other end of the capacitor C (n-1)1 and one end of the inductor L (n-1)1; one end of the capacitor C (n-1)1 is connected with the source electrode of the power switch S; the cathode of the diode D (n-1)1 is connected with the drain electrode of the power switch S;
The nth multiple expansion unit comprises a diode D n1、Dn2, a capacitor C n1 and an inductor L n1;
The other end of the inductor L (n-1)1 is provided with a diode D n1 anode and a diode D n2 anode respectively; the cathode of the diode D n2 is respectively connected with the other end of the capacitor C n1 and one end of the inductor L n1; one end of the capacitor C n1 is connected with the source electrode of the power switch S; the cathode of the diode D n1 is connected with the drain electrode of the power switch S;
The two ends of the load R are respectively connected with one end of the capacitor C 0 and the other end of the capacitor C 0.
2. The multiple ultra-high voltage gain DC-DC converter according to claim 1, wherein the gate of the power switch S is connected to the controller, the duty cycle of which can be changed between 0 and 1, and the input/output voltage gain coefficient is increased once for each stage of the multiple expansion unit compared with the denominator of the voltage gain coefficient of the conventional Boost.
3. The multiple ultra-high voltage gain DC-DC converter according to claim 1, wherein when the number of the multiple expansion units is 2, the current of the inductor L 1、L11、L21 is continuously turned on, and the circuit can be divided into 2 working states according to different power switch states:
(1) The power switch S is turned on, the diode D 12、D22、D0 is turned off, at the moment, the inductor L 1、L11、L21 is charged, and the capacitor C 11、C21 is discharged; the inductor L 1、L11、L21 terminal voltage is as follows:
(2) The power switch S is turned off, the diodes D 12、D22、D0 are all turned on, at the moment, the inductor L 1、L11、L21 is all discharged, and the capacitor C 11、C21 is charged; the inductor L 1、L11、L21 terminal voltage is as follows:
4. A multiple ultra-high voltage gain DC-DC converter, the converter comprising:
A Boost converter, 2 multiple expansion units;
The Boost converter comprises an inductor L 1, a power switch S, a diode D 0 and a capacitor C 0;
The positive electrode of the direct current power supply u in is connected with one end of the inductor L 1, and the negative electrode of the direct current power supply u in is respectively connected with the source electrode of the power switch S and the other end of the capacitor C 0; one end of the capacitor C 0 is connected with the cathode of the diode D 0, and the anode of the diode D 0 is connected with the drain electrode of the power switch S;
The first multiple expansion unit comprises a diode D 11、D12, a capacitor C 11 and an inductor L 11;
The other end of the inductor L 1 is respectively connected with the anode of the diode D 11 and the anode of the diode D 12; the cathode of the diode D 12 is respectively connected with the other end of the capacitor C 11 and one end of the inductor L 11; one end of the capacitor C 11 is connected with the source electrode of the power switch S; the cathode of the diode D 11 is connected with the drain electrode of the power switch S;
the second multiple expansion unit comprises a diode D 21、D22, a capacitor C 21 and an inductor L 21;
The other end of the inductor L 11 is respectively connected with the anode of the diode D 21 and the anode of the diode D 22; the cathode of the diode D 22 is respectively connected with the other end of the capacitor C 21 and one end of the inductor L 21; one end of the capacitor C 21 is connected with the source electrode of the power switch S; the cathode of the diode D 21 is connected with the drain electrode of the power switch S;
The two ends of the load R are respectively connected with one end of the capacitor C 0 and the other end of the capacitor C 0.
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| CN113890340A (en) * | 2021-09-01 | 2022-01-04 | 三峡大学 | Single-input high-reliability capacitance-current consistent buck-boost DC-DC converter |
| CN113890342A (en) * | 2021-09-06 | 2022-01-04 | 三峡大学 | Multi-input high-reliability Sepic DC-DC converter with consistent capacitance and current |
| CN113965085A (en) * | 2021-10-11 | 2022-01-21 | 三峡大学 | Single-input high-reliability capacitor current consistent Cuk DC-DC converter |
| CN114301282A (en) * | 2021-12-31 | 2022-04-08 | 镇江金能电力科技有限公司 | High-gain DC-DC converter based on coupling inductor |
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| CN113890341A (en) * | 2021-09-06 | 2022-01-04 | 三峡大学 | Multi-input high-reliability Sepic DC-DC converter |
| CN113890342A (en) * | 2021-09-06 | 2022-01-04 | 三峡大学 | Multi-input high-reliability Sepic DC-DC converter with consistent capacitance and current |
| CN113965085A (en) * | 2021-10-11 | 2022-01-21 | 三峡大学 | Single-input high-reliability capacitor current consistent Cuk DC-DC converter |
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