CN104022653A - Boost type three-phase three-level direct current converter and control method thereof - Google Patents
Boost type three-phase three-level direct current converter and control method thereof Download PDFInfo
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- CN104022653A CN104022653A CN201410241046.2A CN201410241046A CN104022653A CN 104022653 A CN104022653 A CN 104022653A CN 201410241046 A CN201410241046 A CN 201410241046A CN 104022653 A CN104022653 A CN 104022653A
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Abstract
The invention discloses a Boost type three-phase three-level direct current converter. The Boost type three-phase three-level direct current converter comprises a direct current source, a three-phase three-level inverter, a three-phase isolation transformer and a rectifying filter circuit which are sequentially connected. The three-phase three-level inverter is formed by assembling a half-bridge three-level unit and full-bridge units, the two units share two switching tubes in the middle of a three-level inverter bridge arm in the half-bridge three-level unit, and a Boost inductor is further connected between a middle point A of a three-level inverter bridge arm and the direct current source. A three-level structure is adopted in the direct current converter, voltage stress of the switching tube can be reduced, and the direct current inverter is suitable for medium and high voltage input occasions. By the adoption of a three-phase structure, current stress and power rating of the switching tube can be reduced, zero-voltage on and off states of part of the switching tube can be achieved without externally adding a resonant element, and the converter has high efficiency. The Boost inductor is added between the middle point A of the three-level inverter bridge arm and the direct current source, an input current is continuous, and the Boost type three-phase three-level direct current converter and the control method of the direct current converter are suitable for the application occasions with a low requirement for current pulses.
Description
Technical field
The invention belongs to converter technical field, particularly a kind of Boost type three-phase tri-level DC converter and control method thereof.
Background technology
Increasingly serious along with the day by day in short supply and environmental pollution of fossil energy, regenerative resource is just being subject to paying close attention to more and more widely.Wherein, fuel cell is rapidly developed with its clean, efficient feature.Fuel cell is a current-control type voltage source, requires output ripple current little, and the converter that is therefore applied to electric power supply system of fuel cell need adopt current type converter.Traditional single-phase electricity flow pattern DC converter, as recommend, half-bridge and full-bridge converter, along with the increase of power grade, the power rating of switching tube can increase thereupon, thereby has limited the application of converter.
Three facies pattern DC converter can reduce by increasing the number of phases of transformer the electric current quota of switching tube, make it to be applicable to large-power occasions; And three-level converter can reduce by increasing the quantity of switching tube the voltage stress of switching tube, make it to be applicable to high input voltage occasion.Three-phase tri-level DC converter has three-phase structure and three level structures concurrently, have advantages of that three-level DC converter voltage stress is little and three facies pattern DC converter electric currents quota is little, but its input current is interrupted, and be not suitable for electric power supply system of fuel cell occasion.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of Boost type three-phase tri-level DC converter and control method thereof, and this converter can make continuous input current.
A kind of Boost type three-phase tri-level DC converter disclosed by the invention, comprise the input unit, three-phase tri-level inverter, three-phase isolation transformer and the current rectifying and wave filtering circuit that connect successively, three-phase tri-level inverter is combined by half-bridge three-level unit and full bridge unit, two switching tubes in two units shared half-bridge three-level unit in the middle of tri-level inversion brachium pontis.Described DC converter input unit comprises DC source and Boost inductance, and this Boost inductance is connected between DC source and tri-level inversion brachium pontis mid point A.This tri-level inversion brachium pontis is half-bridge three-level unit and the shared brachium pontis of full bridge unit.
As the further improvement of technique scheme, described three-phase tri-level inverter comprises first and second input dividing potential drop electric capacity the first and second fly-wheel diode striding capacitances and first, second, third, fourth, the 5th and the 6th switching tube; Wherein, form half-bridge three-level unit by the first and second fly-wheel diode striding capacitances and first, the 3rd, the 4th and the 6th switching tube, by first, second, the 4th and the 5th switching tube forms full bridge unit.The former limit winding of described three-phase isolation transformer adopts triangle connected mode, and three outputs are connected to the mid point of tri-level inversion brachium pontis
a, mid point between first, second input dividing potential drop electric capacity and the mid point of the other one group of brachium pontis of full bridge unit
c; Its secondary winding adopts Y-connection mode, and three Same Name of Ends are connected to secondary rectifier bridge respectively organizes the mid point of brachium pontis, and three different name ends link together; Current rectifying and wave filtering circuit 4 adopts three-phase bridge rectifier circuit and single capacitor filter circuit.
The control method of described Boost type three-phase tri-level DC converter: the complementary conducting of two switching tubes of every group of brachium pontis of Boost type three-phase tri-level DC converter of the present invention, on adjacent brachium pontis, manage service time 1/3rd switch periods of being separated by, because two switching tube duty ratios of every group of brachium pontis are unequal, be therefore defined as asymmetric control mode.On brachium pontis, the scope of pipe duty ratio is 0 ~ 1/3, does not consider the situation of two upper pipes conducting simultaneously.
The present invention's main feature is compared with prior art: adopt three level structures, can reduce the voltage stress of switching tube, be applicable to mesohigh input occasion; Adopt three-phase structure, can reduce current stress and the power rating of switching tube, can realize the zero voltage switch of part switching tube without extra resonance element, converter has high efficiency; Between DC source and tri-level inversion brachium pontis mid point, add Boost inductance, made continuous input current, be applicable to the less application scenario of current pulsation requirement.
brief description of the drawings
Accompanying drawing 1 is Boost type three-phase tri-level DC converter topological structure schematic diagram of the present invention;
Accompanying drawing 2 is main waveform schematic diagrames of Boost type three-phase tri-level DC converter;
Accompanying drawing 3-16 is the equivalent circuit structure schematic diagram of each switch mode.
Main designation in above-mentioned accompanying drawing:
v in : input direct voltage;
c d1
, C d2
: input dividing potential drop electric capacity;
q 1 ～Q 6: switching tube;
c 1 ～C 6: switching tube parasitic capacitance;
d 1 ～D 6: switching tube body diode;
d f1
, D f2
: fly-wheel diode;
c ss :striding capacitance;
t ra , T rb , T rc : three-phase isolation transformer
aphase,
bxiang He
cphase;
l lka , L lkb , L lkc : the parasitic leakage inductance in the former limit of isolating transformer;
d r1
～D r6
: secondary rectifier diode;
l: Boost inductance;
c f : output filter capacitor;
r ld : load;
v aB :
awith
bpoint-to-point transmission voltage,
v aC : Awith
cpoint-to-point transmission voltage,
v bC :
bwith
cpoint-to-point transmission voltage;
v o : output voltage;
i a , i b , i c : flow out
apoint,
bpoint and
cthe electric current of point;
i pa , i pb , i pc : isolating transformer
aphase,
bxiang He
cthe primary current of phase;
i sa , i sb , i sc : isolating transformer
aphase,
bxiang He
cthe secondary current of phase.
Embodiment
Below in conjunction with accompanying drawing, a kind of Boost type three-phase tri-level DC converter and control method thereof that the present invention is proposed are elaborated.
As shown in Figure 1, Boost type three-phase tri-level DC converter of the present invention, comprises the input unit 1, three-phase tri-level inverter 2, three-phase isolation transformer 3 and the current rectifying and wave filtering circuit 4 that connect successively.Input unit 1 comprises DC source
v in and Boost inductance, this Boost inductance is connected on DC source and tri-level inversion brachium pontis mid point
abetween, this tri-level inversion brachium pontis is half-bridge three-level unit and the shared brachium pontis of full bridge unit.The former limit winding of described three-phase isolation transformer 3 adopts triangle connected mode, and three outputs are connected to mid point, the mid point of two input dividing potential drop electric capacity and the mid point of the other one group of brachium pontis of full bridge unit (being that group brachium pontis non-and half-bridge three-level units shared) of tri-level inversion brachium pontis; Its secondary winding adopts Y-connection mode, and three Same Name of Ends are connected to secondary rectifier bridge respectively organizes the mid point of brachium pontis, and three different name ends link together; Current rectifying and wave filtering circuit 4 adopts three-phase bridge rectifier circuit.
Described three-phase tri-level inverter 2 comprises the first and second dividing potential drop electric capacity
c d1
, C d2
,the first and second fly-wheel diodes
d f1
, D f2
,striding capacitance
c ss and first, second, third, fourth, the 5th and the 6th switching tube
q 1 , Q 2 , Q 3 , Q 4 , Q 5 , Q 6.Wherein, by the first and second fly-wheel diodes
d f1
, D f2
, striding capacitance
c ss and first, the 3rd, the 4th and the 6th switching tube
q 1 , Q 3 , Q 4 , Q 6composition half-bridge three-level unit, by first, second, the 4th and the 5th switching tube
q 1 , Q 2 , Q 4 , Q 5composition full bridge unit.Two switching tubes in two units shared half-bridge three-level unit in the middle of tri-level inversion brachium pontis
q 4with
q 6.The first dividing potential drop electric capacity
c d1
one end and the tie point of the 6th switching tube drain electrode form the positive pole of DC bus, the second dividing potential drop electric capacity with
c d2
one end and the tie point of the 3rd switching tube source electrode form the negative pole of DC bus.The 6th switching tube
q 6source electrode connect respectively the first fly-wheel diode
d f1
negative electrode, striding capacitance
c ss one end, the first switching tube
q 1drain electrode and the 5th switching tube
q 5drain electrode, the 3rd switching tube
q 3drain electrode connect respectively the second fly-wheel diode
d f2
anode, striding capacitance
c ss the other end, the 4th switching tube
q 4source electrode and second switch pipe
q 2source electrode, the first fly-wheel diode
d f1
anode and the second fly-wheel diode
d f2
the tie point of negative electrode connects the first dividing potential drop electric capacity
c d1
the other end and the second dividing potential drop electric capacity
c d2
the tie point of the other end.Described three-phase isolation transformer 4 be by
aphase,
bxiang He
cphase transformer
t ra , T rb , T rc composition,
aphase transformer
t ra the Same Name of Ends of former limit winding passes through
athe parasitic leakage inductance in the former limit of phase transformer
l lka connect respectively
cphase transformer
t rc the different name end of former limit winding and the first switching tube
q 1source electrode and the 4th switching tube
q 4the tie point of drain electrode,
bphase transformer
t rb the Same Name of Ends of former limit winding passes through
bthe parasitic leakage inductance in the former limit of phase transformer
l lkb connect respectively
aphase transformer
t ra the different name end of former limit winding and the first fly-wheel diode
d f1
anode and the second fly-wheel diode
d f2
the tie point of negative electrode,
cphase transformer
t rc the Same Name of Ends of former limit winding passes through
cthe parasitic leakage inductance in the former limit of phase transformer
l lkc connect respectively
bphase transformer
t rb the different name end of former limit winding and the 5th switching tube
q 5source electrode and second switch pipe
q 2the tie point of drain electrode.
aphase,
bmutually and
cphase transformer
t ra , T rb , T rc the different name end of secondary winding interconnects.Described current rectifying and wave filtering circuit 4 comprises the first to the 6th rectifier diode
d r1
, D r2
, D r3
, D r4
, D r5
, D r6
and filter capacitor
c f , the first rectifier diode
d r1
anode and the second rectifier diode
d r2
the tie point of negative electrode connects
aphase transformer
t ra the Same Name of Ends of secondary winding, the 3rd rectifier diode
d r3
anode and the 4th rectifier diode
d r4
the tie point of negative electrode connects
bphase transformer T
rbthe Same Name of Ends of secondary winding, the 5th rectifier diode
d r5
anode and the 6th rectifier diode
d r6
the tie point of negative electrode connects
cphase transformer
t rc the Same Name of Ends of secondary winding, first, the 3rd and the 5th rectifier diode
d r1
, D r3
,
d r5
negative electrode interconnect and connect filter capacitor
c f one end and load
r ld one end, second, the 4th and the 6th rectifier diode
d r2
, D r4
, D r6
anode interconnect and connect filter capacitor
c f the other end and load
r ld the other end.
In converter of the present invention, the first and second dividing potential drop electric capacity
c d1
, C d2
capacity very large and equate, both voltage is the half of DC bus-bar voltage,
v cd1 =V cd2 =V bus /2, two dividing potential drop electric capacity all can be regarded voltage as and be
v bus/ 2 voltage source.The first to the 6th switching tube
q 1 ~ Q 6be the device for power switching with body diode and parasitic capacitance.
The control method of converter of the present invention is as follows: the first switching tube
q 1with the 4th switching tube
q 4complementary conducting, second switch pipe
q 2with the 5th switching tube
q 5complementary conducting, the 3rd switching tube
q 3with the 6th switching tube
q 6complementary conducting, the first switching tube
q 1,the 3rd switching tube
q 3with the 5th switching tube
q 5oN time identical, its 1/3rd switch periods of being separated by are successively opened shutoff, the scope of duty ratio is 0 ~ 1/3.Because two switching tube duty ratios of every group of brachium pontis are unequal, be therefore defined as asymmetric control mode.
Due to the difference of converter steady operation point or converter self parameter, the working condition of converter also there are differences.For the sake of simplicity, this specification is only analyzed for a kind of working condition wherein.There are 14 kinds of switch mode by known this converter of accompanying drawing 2 a switch periods.In the whole switch periods of a kind of working condition below in conjunction with Fig. 3 ~ Figure 16 to converter of the present invention, each switch mode is made a concrete analysis of.
Before analyzing, make the following assumptions: 1, Boost inductance
lvalue enough large, it is equivalent to together with input source to a current value and is
i l current source; 2, the value of dividing potential drop electric capacity and output filter capacitor is enough large, and it is equivalent to respectively to three voltage sources; 3, striding capacitance
c ss the voltage at two ends is approximately constant value
v bus /2; 4, all devices are desirable device; 5, all hard switching processes completed in moment.
Switch mode 1 [
t 0in the past]
As shown in Figure 3,
t 0before moment,
q 2 , Q 4 , Q 6conducting, but
q 2 , Q 6current flowing is zero.
d r1
~ D r6
all cut-offs,
d f1
cut-off,
d f2
conducting,
c ss be clamped at
v bus /2.Transformer primary side is not to secondary transferring energy.
Switch mode 2 [
t 0 -t 1]
As shown in Figure 4,
t 0moment,
q 4turn-off,
c 4existence make
q 4both end voltage can not be suddenlyd change, thereby has realized no-voltage shutoff.Now,
c 1start electric discharge,
c 4start charging.
c ss voltage be clamped at
v bus /2
, D f1
cut-off
, D f2
conducting,
d r1
~ D r6
cut-off,
c 1with
c 4charging and discharging currents by
i l provide.T
1moment, junction capacitance
c 1both end voltage is discharged to 0, and this mode finishes.
Switch mode 3 [
t 1 -t 2]
As shown in Figure 5,
t 1moment,
d 1conducting.Now open-minded
q 1 , Q 1realize no-voltage open-minded.
v AB =?V bus /2
，v BC =0；
v CA =－V bus /2。In this mode,
d r1
, D r6
conducting,
d f1
cut-off,
d f2
conducting,
c ss be clamped at
v bus /2.Transformer
aphase current forward rises,
bphase current is zero,
cphase current oppositely declines.Arrive
t 2moment,
q 1turn-off,
aphase current rises to maximum, and this mode finishes.
Switch mode 4 [
t 2 -t 3]
As shown in Figure 6,
t 2moment,
c 1existence make
q 1both end voltage can not be suddenlyd change, thereby has realized no-voltage shutoff.Now,
c 1start charging,
c 4start electric discharge, circuit enters resonance condition, and the element that participates in resonance is
c 1 , C 4 , L lka , L lkc .In this mode,
d r1
, D r6
conducting,
d f1
cut-off,
d f2
conducting
, C ss be clamped at
v bus /2, transformer
aphase current resonance declines,
bphase current is zero,
cphase current resonance rises.Work as junction capacitance
c 4both end voltage resonance was by 0 o'clock, and this mode finishes.
5. switch mode 5[
t 3 -t 4]
As shown in Figure 7,
t 3moment,
d 4conducting, resonant process finishes,
q 4realize no-voltage open-minded.Now
v aB =v bC =v cA =0.In this mode,
d r1
, D r6
conducting,
d f1
cut-off,
d f2
conducting,
c ss be clamped at
v bus /2.Transformer primary side
aphase current forward declines,
bphase current is zero,
cphase current oppositely rises.Arrive
t 4moment, transformer
aphase current drops to zero,
d r1
, D r6
naturally cut-off, this mode finishes.
Switch mode 6 [
t 4 -t 5]
As shown in Figure 8, in this mode,
d r1
~ D r6
all cut-offs,
d f1
cut-off,
d f2
conducting.Former limit is no longer to secondary transferring energy.Now transformer leakage inductance voltage, former secondary voltage are zero.Arrive
t 5moment,
q 3open-minded, this mode finishes.
Switch mode 7 [
t 5 -t 6]
As shown in Figure 9
, t 5moment
, Q 3it is firmly open-minded,
d r2
,
d r3
start conducting,
d f2
end because bearing back-pressure,
c ss the current potential of upper end declines,
d f1
conducting,
c ss start charging, when current potential higher than
v bus /after 2,
d f1
cut-off.Now
v aB =-V bus /2
, v bC =V bus/ 2
; v cA =0.Transformer primary side
aphase current oppositely declines,
bphase current forward rises,
cphase current is zero.Arrive
t 6moment
, Q 3turn-off,
bphase current rises to maximum, and this mode finishes.
Switch mode 8 [
t 6 -t 7]
As shown in Figure 10,
t 6moment,
q 3turn-off
, C 3existence make
q 3 both end voltage can not be suddenlyd change, thereby has realized no-voltage shutoff.Now,
c 3start charging,
c 6start electric discharge, circuit enters resonance condition, and the element that participates in resonance is
c 3 , C 6 , L lka with
l lkb .In this mode
, D r2
, D r3
conducting,
d f1
, D f2
cut-off,
c ss the voltage at two ends is approximately
v bus / 2,transformer
aphase current resonance rises,
bphase current resonance declines,
cphase current is zero.
t 7moment
,junction capacitance
c 6both end voltage resonance to 0, this mode finishes.
Switch mode 9 [
t 7 -t 8]
As shown in Figure 11,
t 7moment,
d 6conducting, resonant process finishes,
q 6realize no-voltage open-minded.Now
v aB =v bC =v cA =0.In this mode,
d r2
, D r3
still conducting,
d f1
cut-off,
c ss both end voltage drops to
v bus /2 o'clock,
d f2
conducting.Transformer primary side
aphase current oppositely rises,
bphase current forward declines,
cphase current is zero.Arrive
t 8moment,
bphase current drops to zero,
d r2
, D r3
naturally cut-off, this mode finishes.
Switch mode 10 [
t 8 -t 9]
As shown in Figure 12, in this mode,
d r1
~ D r6
all cut-offs,
d f1
, D f2
cut-off.Former limit is no longer to secondary transferring energy.Now transformer leakage inductance voltage, former secondary voltage are zero.
t9moment,
q 5open-minded, this mode finishes.
11. switch mode 11 [
t 9 -t 10]
As shown in Figure 13,
t 9moment,
q 5it is firmly open-minded,
d r4
, D r5
start conducting,
d f1
, D f2
cut-off.Now
v aB =0
, v bC =-V bus /2
; v cA =V in /2.Transformer primary side
aphase current is zero,
bphase current oppositely declines,
cphase current forward rises.Arrive
t 10in the moment, turn-off
q 5,
cphase current rises to forward maximum, and this mode finishes.
12. switch mode 12 [
t 10 -t 11]
As shown in Figure 14,
t 10moment,
c 5existence make
q 5both end voltage can not be suddenlyd change, thereby has realized no-voltage shutoff.Now,
c 5start charging,
c 2start electric discharge, circuit enters resonance condition, and the element that participates in resonance is
c 2 , C 5 , L lkb with
l lkc .In this mode,
d r4
, D r5
conducting,
d f1 cut-off,
d f2
conducting, transformer primary side
aphase current is zero,
bphase current resonance declines,
cphase current resonance rises.
t 11moment, junction capacitance
c 2both end voltage resonance to 0, this mode finishes.
13. switch mode 13[
t 11 -t 12]
As shown in Figure 15,
t 11moment,
d 2conducting, resonant process finishes,
q 2realize no-voltage open-minded.Now
v aB =v bC =v cA =0.In this mode,
d r4
, D r5
still conducting,
d f1
cut-off,
d f2
conducting.Transformer primary side
aphase current is zero,
bphase current oppositely rises,
cphase current forward declines.Arrive
t 12moment,
cphase current drops to zero,
d r4
, D r5
naturally cut-off, this mode finishes.
14. switch mode 14[
t 12after]
As shown in Figure 16, get back to initial mode.
Example of the present invention is as follows: input direct-current source voltage
v in =240V; Output dc voltage
v o =42V; Output current
i o =24A; Three-phase transformer pair, former limit no-load voltage ratio
k=4:34; Boost inductance
l=1200 μ H; Output filter capacitor
c f =2000uF; Switching tube
q 1 -Q 6adopt IPW60R125C6; Fly-wheel diode
d f1
, D f2
adopt ISL9R3060G2; Secondary rectifier diode
d r1
-D r6
adopt STPS40H100CW; Switching frequency
f s =50kHz.
As seen from the above description, the Boost type three-phase tri-level DC converter tool that the present invention proposes has the following advantages:
1. three level structures can reduce the voltage stress of switching tube, are applicable to mesohigh input occasion;
2. three-phase structure can reduce the power rating of switching tube, is applicable to high-power applications occasion;
3. can realize the zero voltage switch of part switching tube without extra resonance element;
4. input side is inductance, and therefore continuous input current is applicable to the less application scenario of current pulsation requirement.
The concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improve and also should be considered as protection scope of the present invention.
Claims (3)
1. a Boost type three-phase tri-level DC converter, comprise the input unit (1), three-phase tri-level inverter (2), three-phase isolation transformer (3) and the current rectifying and wave filtering circuit (4) that connect successively, three-phase tri-level inverter (2) is combined by half-bridge three-level unit and full bridge unit, two switching tubes in two units shared half-bridge three-level unit in the middle of tri-level inversion brachium pontis, it is characterized in that: described input unit (1) comprises Boost inductance, this Boost inductance is connected on DC source and tri-level inversion brachium pontis mid point
abetween.
2. Boost type three-phase tri-level DC converter according to claim 1, is characterized in that: described three-phase tri-level inverter (2) comprises the first and second input dividing potential drop electric capacity
c d1
,
c d2
, the first and second fly-wheel diodes
d f1
, D f2
, striding capacitance
c ss
and first, second, third, fourth, the 5th and the 6th switching tube
q 1 , Q 2 , Q 3 , Q 4 , Q 5 , Q 6; Wherein, by the first and second fly-wheel diodes
d f1
, D f2
,striding capacitance
c ss
and first, the 3rd, the 4th and the 6th switching tube
q 1,
q 3 , Q 4 , Q 6composition half-bridge three-level unit, by first, second, the 4th and the 5th switching tube
q 1 , Q 2 , Q 4 , Q 5composition full bridge unit; The former limit winding of three-phase isolation transformer 3 adopts triangle connected mode, and three outputs are connected to the mid point of tri-level inversion brachium pontis
a, first, second input dividing potential drop electric capacity
c d1
, C d2
between mid point
bmid point with the other one group of brachium pontis of full bridge unit
c;its secondary winding adopts Y-connection mode, and three Same Name of Ends are connected to secondary rectifier bridge respectively organizes the mid point of brachium pontis, and three different name ends link together; Current rectifying and wave filtering circuit (4) adopts three-phase bridge rectifier circuit and single capacitor filter circuit.
3. the control method of the Boost type three-phase tri-level DC converter described in claim 1 or 2, it is characterized in that: adopt asymmetric control mode, the complementary conducting of two switching tubes of every group of brachium pontis, on adjacent brachium pontis, manage service time 1/3rd switch periods of being separated by, on brachium pontis, the scope of pipe duty ratio is 0 ~ 1/3.
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|---|---|---|---|
| CN201410241046.2A CN104022653A (en) | 2014-06-03 | 2014-06-03 | Boost type three-phase three-level direct current converter and control method thereof |
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ID=51439265
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712523A (en) * | 2017-02-19 | 2017-05-24 | 盐城工学院 | Boost three-level full-bridge inverter and control method thereof |
| CN112290801A (en) * | 2020-10-21 | 2021-01-29 | 哈尔滨工业大学 | Isolated direct current converter with high step-up ratio and control method thereof |
| CN113437878A (en) * | 2021-06-30 | 2021-09-24 | 燕山大学 | Current type DC/DC isolation converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712523A (en) * | 2017-02-19 | 2017-05-24 | 盐城工学院 | Boost three-level full-bridge inverter and control method thereof |
| CN106712523B (en) * | 2017-02-19 | 2018-10-19 | 盐城工学院 | A kind of three levels full-bridge converters of boosting and its control method |
| CN112290801A (en) * | 2020-10-21 | 2021-01-29 | 哈尔滨工业大学 | Isolated direct current converter with high step-up ratio and control method thereof |
| CN112290801B (en) * | 2020-10-21 | 2021-08-03 | 哈尔滨工业大学 | Isolated direct current converter with high step-up ratio and control method thereof |
| CN113437878A (en) * | 2021-06-30 | 2021-09-24 | 燕山大学 | Current type DC/DC isolation converter |
| CN113437878B (en) * | 2021-06-30 | 2022-07-12 | 燕山大学 | Current type DC/DC isolation converter |
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