CN102025280B - Symmetry control type three-phase three-level direct current converter and symmetry control method thereof - Google Patents
Symmetry control type three-phase three-level direct current converter and symmetry control method thereof Download PDFInfo
- Publication number
- CN102025280B CN102025280B CN 201010598995 CN201010598995A CN102025280B CN 102025280 B CN102025280 B CN 102025280B CN 201010598995 CN201010598995 CN 201010598995 CN 201010598995 A CN201010598995 A CN 201010598995A CN 102025280 B CN102025280 B CN 102025280B
- Authority
- CN
- China
- Prior art keywords
- phase
- switching tube
- phase transformer
- circuit
- tie point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000002955 isolation Methods 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims description 34
- 239000003990 capacitor Substances 0.000 claims description 31
- 230000003071 parasitic effect Effects 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002459 sustained effect Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 3
- 230000009194 climbing Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
Images
Landscapes
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a symmetry control type three-phase three-level direct current converter and a symmetry control method thereof, belonging to the field of power electronic converters. The converter comprises a power circuit (1), a half-bridge three-level circuit (2), a full-bridge circuit (3), a three-phase isolation transformer (4) and a rectifier filter circuit (5) which are connected in sequence. The converter is characterized in that all switching tubes in the converter have the same conduction time; the adjacent switching tubes are conducted in turn; and the turn-on time interval is 1/6 switching cycle. The converter has the following technical effects: the voltage stress of all the switching tubes in the converter is half the input voltage; the three-phase transformer and the symmetry control mode improve the input and output current ripple frequency, thus reducing the volume of the input and output filters; and meanwhile, the current stress of the switching tubes is effectively reduced.
Description
Technical field
The present invention relates to a kind of symmetrical control type three-phase tri-level DC converter and control method thereof in the power inverter, belong to the converters field.
Background technology
Along with the extensive use of various power electronic equipments, people have proposed strict requirement to the power quality of the power conversion unit of use civil power.International Electrotechnical Commission has formulated corresponding standard, and harmonic content is limited, and this just requires electric device to be necessary to adopt power factor correction technology.In, powerful high frequency switch power is generally three-phase 380VAC ± 20% input, the DC bus-bar voltage after the rectification is the highest will to be reached about 640V.If adopt the three-phase activity coefficient technology, DC bus-bar voltage can reach 760～800V usually, even can be up to upper kilovolt, this just so that in the rear class DC converter voltage stress of switching tube greatly increase, brought difficulty for choosing of device.
Three-level converter can reduce by the quantity that increases switching tube the voltage stress of switching tube, makes it to be applicable to the high input voltage occasion.Half-bridge three-level converter is one of isolated form three-level converter that proposes the earliest, it have circuit structure simple, can realize the advantages such as soft switch and switching frequency be constant, thereby used widely.But along with the raising of power output, the current stress of switching tube also increases thereupon.In order to reduce the current stress of switching tube, can adopt the method for a plurality of devices or module parallel connection, but also have the problems such as thermal design is difficult, control circuit is complicated simultaneously.
Summary of the invention
The present invention is directed to the high-voltage input high-power application scenario, and propose a kind of symmetrical control type three-phase tri-level DC converter and symmetrical control method thereof that can effectively reduce switch tube voltage and current stress.
The structure of this symmetry control type three-phase tri-level DC converter comprises: power circuit, half-bridge three-level circuit, full-bridge circuit, three-phase isolation transformer and current rectifying and wave filtering circuit; Described power circuit comprises DC source and the first and second dividing potential drop electric capacity, one end of the first dividing potential drop electric capacity and the tie point of DC source positive pole consist of the positive input terminal of power circuit, and an end of the second dividing potential drop electric capacity and the tie point of DC source negative pole consist of the negative input end of power circuit; Described half-bridge three-level circuit comprises the first and second fly-wheel diodes, striding capacitance and first, the 3rd, the the 4th and the 6th switching tube, described full-bridge circuit comprises first, second, the the 4th and the 5th switching tube, full-bridge circuit and half-bridge three-level circuit share the first and the 4th switching tube, wherein: the drain electrode of the 6th switching tube connects the positive input terminal of power circuit, the source electrode of the 3rd switching tube connects the negative input end of power circuit, the source electrode of the 6th switching tube connects respectively the negative electrode of the first fly-wheel diode, one end of striding capacitance, the drain electrode of the drain electrode of the first switching tube and the 5th switching tube, the drain electrode of the 3rd switching tube connects respectively the anode of the second fly-wheel diode, the other end of striding capacitance, the source electrode of the source electrode of the 4th switching tube and second switch pipe, the first fly-wheel diode anode are connected the tie point of the first dividing potential drop electric capacity other end and the second dividing potential drop electric capacity other end in the power circuit with the tie point of the second fly-wheel diode negative electrode; Described three-phase isolation transformer is by a phase, b reaches mutually the c phase transformer and forms, the Same Name of Ends of the former limit of a phase transformer winding connects respectively the different name end of the former limit of c phase transformer winding and the tie point of the first switching tube source electrode and the drain electrode of the 4th switching tube by the parasitic leakage inductance in the former limit of a phase transformer, the Same Name of Ends of the former limit of b phase transformer winding connects respectively the different name end of the former limit of a phase transformer winding and the tie point of the first fly-wheel diode anode and the second fly-wheel diode negative electrode by the parasitic leakage inductance in the former limit of b phase transformer, the Same Name of Ends of the former limit of c phase transformer winding connects respectively the different name end of the former limit of b phase transformer winding and the tie point of the 5th switching tube source electrode and the drain electrode of second switch pipe, a phase by the parasitic leakage inductance in the former limit of c phase transformer, the different name end that b reaches c phase transformer secondary winding mutually interconnects; Described current rectifying and wave filtering circuit comprises the first to the 6th rectifier diode, filter inductance and filter capacitor, the first rectifier diode anode is connected the Same Name of Ends of a phase transformer secondary winding with the tie point of the second rectifier diode negative electrode, the 3rd rectifier diode anode is connected the Same Name of Ends of b phase transformer secondary winding with the tie point of the 4th rectifier diode negative electrode, the 5th rectifier diode anode is connected the Same Name of Ends of c phase transformer secondary winding with the tie point of the 6th rectifier diode negative electrode, first, the 3rd interconnects and connects an end of filter inductance with the negative electrode of the 5th rectifier diode, the other end of filter inductance connects respectively an end of filter capacitor and an end of load, second, the 4th interconnects with the anode of the 6th rectifier diode and connects the other end of filter capacitor and the other end of load.
The symmetrical control method of above-mentioned symmetrical control type three-phase tri-level DC converter is: the ON time of the first to the 6th switching tube is identical, the successively in turn conducting of switching tube that sequence number is adjacent, service time 1/6 switch periods of being separated by, the change in duty cycle scope of each switching tube is 1/6～1/3.
The present invention compared with prior art has following technique effect:
(1) voltage stress of all switching tubes is half of input voltage, is applicable to the high input voltage occasion;
(2) Effective Raise input and output current pulsation frequency, and then reduced input and output filter volume, improved the power density of converter, improved the dynamic characteristic of converter;
(3) adopt the three-phase transformer structure, effectively reduce the current stress of switching tube, be applicable to the high-power applications occasion.
Description of drawings
Fig. 1 is the circuit structure schematic diagram of converter of the present invention.
Fig. 2 is the main waveform schematic diagram of converter of the present invention.
Fig. 3～Figure 21 is respectively the equivalent circuit theory figure of converter first half cycle switch mode 1～19 of the present invention.
Designation in the above-mentioned accompanying drawing: V
InBe (input) DC source; C
D1, C
D2Be respectively first, second dividing potential drop electric capacity; Q
1～Q
6Be respectively the first to the 6th switching tube; C
1～C
6Be respectively the parasitic capacitance of the first to the 6th switching tube; D
1～D
6Be respectively the body diode of the first to the 6th switching tube; D
F1, D
F2Be respectively first, second fly-wheel diode; C
SsBe striding capacitance; T
Ra, T
Rb, T
RcBe respectively a phase, b phase and c phase transformer in the three-phase isolation transformer; L
Lka, L
Lkb, L
LkcBe respectively the parasitic leakage inductance in former limit of a phase, b phase and c phase transformer; D
R1～D
R6Be respectively the first to the 6th rectifier diode; L
fBe filter inductance; C
fBe filter capacitor; R
LdBe load; v
ABBe A, B point-to-point transmission voltage among Fig. 1; v
ACBe A, C point-to-point transmission voltage among Fig. 1; v
BCBe B, C point-to-point transmission voltage among Fig. 1; v
RectBe the secondary commutating voltage; V
oBe output voltage; i
A, i
B, i
CBe respectively and flow out the electric current that A point, B point and C are ordered among Fig. 1; i
Pa, i
Pb, i
PcBe respectively the primary current of a phase, b phase and c phase transformer; i
Sa, i
Sb, i
ScBe respectively the secondary current of a phase, b phase and c phase transformer; I
oBe output current.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, the symmetrical control type three-phase tri-level of the present invention DC converter is to be connected and composed successively by power circuit 1, half-bridge three-level circuit 2, full-bridge circuit 3, three-phase isolation transformer 4 and current rectifying and wave filtering circuit 5, wherein: the former limit winding of three-phase isolation transformer 4 adopts the triangle connected mode, and its secondary winding adopts the Y-connection mode; Current rectifying and wave filtering circuit 5 adopts three-phase bridge rectifier circuit.
The concrete structure of converter of the present invention is as follows:
Described power circuit 1 comprises DC source V
InAnd the first and second dividing potential drop capacitor C
D1, C
D2, the first dividing potential drop capacitor C
D1An end and DC source V
InAnodal tie point consists of the positive input terminal of power circuit 1, the second dividing potential drop capacitor C
D2An end and DC source V
InThe tie point of negative pole consists of the negative input end of power circuit 1; Described half-bridge three-level circuit 2 comprises the first and second sustained diode
F1, D
F2, striding capacitance C
SsAnd the first, the 3rd, the 4th and the 6th switching tube Q
1, Q
3, Q
4, Q
6, described full-bridge circuit 3 comprise first, second, the 4th and the 5th switching tube Q
1, Q
2, Q
4, Q
5, full-bridge circuit 3 shares the first and the 4th switching tube Q with half-bridge three-level circuit 2
1, Q
4, wherein: the 6th switching tube Q
6Drain electrode connect the positive input terminal of power circuit 1, the 3rd switching tube Q
3Source electrode connect the negative input end of power circuit 1, the 6th switching tube Q
6Source electrode connect respectively the first sustained diode
F1Negative electrode, striding capacitance C
SsAn 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 sustained diode
F2Anode, striding capacitance C
SsThe other end, the 4th switching tube Q
4Source electrode and second switch pipe Q
2Source electrode, the first sustained diode
F1Anode and the second sustained diode
F2The tie point of negative electrode connects the first dividing potential drop capacitor C in the power circuit 1
D1The other end and the second dividing potential drop capacitor C
D2The tie point of the other end; Described three-phase isolation transformer 4 is by a phase, b phase and c phase transformer T
Ra, T
Rb, T
RcForm a phase transformer T
RaThe Same Name of Ends of former limit winding is by the parasitic leakage inductance L in the former limit of a phase transformer
LkaConnect respectively c phase transformer T
RcThe 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, b phase transformer T
RbThe Same Name of Ends of former limit winding is by the parasitic leakage inductance L in the former limit of b phase transformer
LkbConnect respectively a phase transformer T
RaThe different name end of former limit winding and the first sustained diode
F1Anode and the second sustained diode
F2The tie point of negative electrode, c phase transformer T
RcThe Same Name of Ends of former limit winding is by the parasitic leakage inductance L in the former limit of c phase transformer
LkcConnect respectively b phase transformer T
RbThe 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, a phase, b reach c phase transformer T mutually
Ra, T
Rb, T
RcThe different name end of secondary winding interconnects; Described current rectifying and wave filtering circuit 5 comprises the first to the 6th rectifier diode D
R1, D
R2, D
R3, D
R4, D
R5, D
R6, filter inductance L
fAnd filter capacitor C
f, the first rectifier diode D
R1Anode and the second rectifier diode D
R2The tie point of negative electrode connects a phase transformer T
RaThe Same Name of Ends of secondary winding, the 3rd rectifier diode D
R3Anode and the 4th rectifier diode D
R4The tie point of negative electrode connects b phase transformer T
RbThe Same Name of Ends of secondary winding, the 5th rectifier diode D
R5Anode and the 6th rectifier diode D
R6The tie point of negative electrode connects c phase transformer T
RcThe Same Name of Ends of secondary winding, the first, the 3rd and the 5th rectifier diode D
R1, D
R3, D
R5Negative electrode interconnect and connect filter inductance L
fAn end, filter inductance L
fThe other end connect respectively filter capacitor C
fAn end and load R
LdAn end, the second, the 4th and the 6th rectifier diode D
R2, D
R4, D
R6Anode interconnect and connect filter capacitor C
fThe other end and load R
LdThe other end.
In converter of the present invention: the first and second dividing potential drop capacitor C
D1, C
D2Capacity very large and equal, both voltage is input direct-current source V
InHalf of voltage, i.e. V
Cd1=V
Cd2=V
InIt is V that/2, two dividing potential drop electric capacity all can be regarded voltage as
In/ 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: switching tube Q
1～Q
6ON time identical, the successively in turn conducting of switching tube that sequence number is adjacent, its service time 1/6 switch periods of being separated by, the change in duty cycle scope of each switching tube is 1/6～1/3, because the ON time of all switching tubes is identical, therefore be referred to as symmetrical control mode.
Because the difference of converter steady operation point or converter self parameter, the working condition of converter also there are differences.As shown in Figure 2, this converter has 36 kinds of switch mode in a switch periods, wherein: time period [t
0Before, t
18] be the front half period, all the other are the later half cycle.For the explanation operation principle, below in conjunction with Fig. 2～Figure 21 each switch mode of front half period of a kind of working condition of converter of the present invention is analyzed.
Made the following assumptions before analyzing: 1. all switching tubes and diode are desirable device; 2. all inductance, electric capacity and isolating transformer are desirable component; 3. striding capacitance C
SsEnough large, its voltage is V during stable state
In/ 2; 4. filter inductance L
fEnough large, in a switch periods its to can be regarded as a current value be I
oConstant-current source, I
oIt is output current.
1. switch mode 1[t
0Before], equivalent electric circuit as shown in Figure 3:
t
0Constantly, switching tube Q
1, diode D
F1And D
5Conducting, rectifier diode D
R1, D
R4And D
R6Conducting.Transformer primary, secondary voltage are zero, so secondary commutating voltage v
RectAlso be zero.
2. switch mode 2[t
0～t
1], equivalent electric circuit as shown in Figure 4:
t
0Constantly, switching tube Q
2Firmly open-minded, diode D
5Current transfer to Q
2In.This moment v
AB=0, v
BC=V
In/ 2, v
AC=-V
In/ 2, i
CLinear decline, i
AAnd i
BThe linear rising.Work as i
PbWhen being reduced to zero, diode D
R4Turn-off D
R3Open-minded, secondary is finished the change of current, and this mode finishes.
3. switch mode 3[t
1～t
2], equivalent electric circuit as shown in Figure 5:
In this mode, switching tube Q
1, Q
2With diode D
F1Conducting, rectifier diode D
R1, D
R3, D
R6Conducting.Can be got by theory analysis, at this moment secondary commutating voltage v
RectBe 0.75kV
In, k be the every phase secondary of transformer to the no-load voltage ratio on former limit, lower with.
4. switch mode 4[t
2～t
3], equivalent electric circuit as shown in Figure 6:
i
BThe beginning forward increases after the zero passage, gives capacitor C
3Capacitor C is given in charging simultaneously
6Discharge, circuit enters resonance condition, and the element that participates in resonance is C
3, C
6And L
Lka, L
Lkb
5. switch mode 5[t
3～t
4], equivalent electric circuit as shown in Figure 7:
t
3Constantly, switching tube Q
1Turn-off capacitor C
1And C
4Participate in resonance, secondary commutating voltage v
RectBegin to descend.Because C
1And C
4Limited Q
1The climbing of voltage, so Q
1For no-voltage is turn-offed.In this process, leakage inductance L
LkaEnergy be used for to C
1And C
4Discharge and recharge, so i
PaDescend i
PbRise, thereby cause i
BBeginning increases, and finally maintains the direction shown in Fig. 7.
6. switch mode 6[t
4～t
5], equivalent electric circuit as shown in Figure 8:
Because the condition of work of circuit is different, capacitor C
1, C
3, C
4And C
6Discharge and recharge the concluding time also different.Suppose C herein
3And C
6Discharge and recharge first end, i
BBe transferred to diode D
F2In, capacitor C
1And C
4Continue to discharge and recharge secondary commutating voltage v
RectContinue to descend.
7. switch mode 7[t
5～t
6], equivalent electric circuit as shown in Figure 9:
t
5Constantly, capacitor C
1And C
4Discharge and recharge end, diode D
4The nature conducting, secondary commutating voltage v
RectDrop to zero.This moment v
AB=v
BC=v
AC=0, i
A, i
BAnd i
CRemain unchanged, its value depends on the final value of a switch mode.
8. switch mode 8[t
6～t
7], equivalent electric circuit as shown in figure 10:
t
6Constantly, switching tube Q
3Firmly open-minded, diode D
F2Current transfer to Q
3In.This moment v
AB=-V
In/ 2, v
BC=V
In/ 2, v
AC=0, i
AAnd i
CLinear decline, i
BThe linear rising.Work as i
PaWhen being reduced to zero, diode D
R1Turn-off D
R2Open-minded, secondary is finished the change of current, and this mode finishes.
9. switch mode 9[t
7～t
8], equivalent electric circuit as shown in figure 11:
In this mode, switching tube Q
2, Q
3With diode D
4Conducting, rectifier diode D
R2, D
R3, D
R6Conducting.Can be got by theory analysis, at this moment secondary commutating voltage v
RectBe 0.75kV
In
10. switch mode 10[t
8～t
9], equivalent electric circuit as shown in figure 12:
i
AThe beginning forward increases after the zero passage, gives capacitor C
4C is given in charging simultaneously
1Discharge, circuit enters resonance condition, and the element that participates in resonance is C
1, C
4And L
Lka, L
Lkc
11. switch mode 11[t
9～t
10], equivalent electric circuit as shown in figure 13:
t
9Constantly, switching tube Q
2Turn-off capacitor C
2And C
5Participate in resonance, secondary commutating voltage v
RectBegin to descend.Because C
2And C
5Limited Q
2The climbing of voltage, so Q
2For no-voltage is turn-offed.In this process, leakage inductance L
LkcEnergy be used for to C
2And C
5Discharge and recharge, so i
PcDescend i
PaRise, thereby cause i
ABeginning increases, and finally maintains direction shown in Figure 13.
12. switch mode 12[t
10～t
11], equivalent electric circuit as shown in figure 14:
Capacitor C
1And C
4After discharging and recharging end, diode D
1The nature conducting, C
2And C
5Continue to discharge and recharge secondary commutating voltage v
RectContinue to descend.
13. switch mode 13[t
11～t
12], equivalent electric circuit as shown in figure 15:
t
11Constantly, capacitor C
2And C
5Discharge and recharge end, diode D
5The nature conducting, secondary commutating voltage v
RectDrop to zero.This moment v
AB=v
BC=v
AC=0, i
A, i
BAnd i
CRemain unchanged.
14. switch mode 14[t
12～t
13], equivalent electric circuit as shown in figure 16:
t
12Constantly, switching tube Q
4Firmly open-minded, diode D
1Current transfer to Q
4In.This moment v
AB=-V
In/ 2, v
BC=0, v
AC=V
In/ 2, i
ALinear decline, i
BAnd i
CThe linear rising.Work as i
PcWhen being reduced to zero, diode D
R6Turn-off D
R5Open-minded, secondary is finished the change of current, and this mode finishes.
15. switch mode 15[t
13～t
14], equivalent electric circuit as shown in figure 17:
In this mode, switching tube Q
3, Q
4With diode D
5Conducting, rectifier diode D
R2, D
R3, D
R5Conducting, secondary commutating voltage v
RectBe 0.75kV
In
16. switch mode 16[t
14～t
15], equivalent electric circuit as shown in figure 18:
i
CThe beginning forward increases after the zero passage, gives capacitor C
5C is given in charging simultaneously
2Discharge, circuit enters resonance condition, and the element that participates in resonance is C
2, C
5And L
Lkb, L
Lkc
17. switch mode 17[t
15～t
16], equivalent electric circuit as shown in figure 19:
t
15Constantly, switching tube Q
3Turn-off capacitor C
3And C
6Participate in resonance, secondary commutating voltage v
RectBegin to descend.Because C
3And C
6Limited Q
3The climbing of voltage, so Q
3For no-voltage is turn-offed.In this process, leakage inductance L
LkbEnergy be used for to C
3And C
6Discharge and recharge, so i
PbDescend i
PcRise, thereby cause i
CBeginning increases, and finally maintains direction shown in Figure 19.
18. switch mode 18[t
16～t
17], equivalent electric circuit as shown in figure 20:
Capacitor C
2And C
5After discharging and recharging end, diode D
2The nature conducting, C
3And C
6Continue to discharge and recharge secondary commutating voltage v
RectContinue to descend.
19. switch mode 19[t
17～t
18], equivalent electric circuit as shown in figure 21:
t
17Constantly, capacitor C
3And C
6Discharge and recharge end, diode D
F2Conducting, secondary commutating voltage v
RectDrop to zero.This moment v
AB=v
BC=v
AC=0, i
A, i
BAnd i
CRemain unchanged.
t
18Constantly, converter enters the later half cycle, working condition and first half periodic group seemingly, so detailed description no longer.
The below provides the parameter of a specific embodiment of the present invention: input direct-current source V
InVoltage be 600V; Output dc voltage V
o=48V; Output current I
o=20A; Three-phase transformer is secondary, former limit no-load voltage ratio is 1: 7; Output inductor L
f=20uH; Output filter capacitor C
f=4400uF; Switch mosfet pipe Q
1～Q
6Adopt APT4012BVR; Sustained diode
F1, D
F2Adopt DSEI30-06A; Rectifier diode D
R1～D
R6Adopt DSEP30-03A; Switching frequency f
s=50kHz.
Claims (2)
1. a symmetrical control type three-phase tri-level DC converter comprises power circuit (1), half-bridge three-level circuit (2), full-bridge circuit (3), three-phase isolation transformer (4) and current rectifying and wave filtering circuit (5);
Described power circuit (1) comprises DC source (V
In) and the first and second dividing potential drop electric capacity (C
D1, C
D2), the first dividing potential drop electric capacity (C
D1) an end and DC source (V
In) anodal tie point consists of the positive input terminal of power circuit (1), the second dividing potential drop electric capacity (C
D2) an end and DC source (V
In) tie point of negative pole consists of the negative input end of power circuit (1);
It is characterized in that: described half-bridge three-level circuit (2) comprises the first and second fly-wheel diode (D
F1, D
F2), striding capacitance (C
Ss) and the first, the 3rd, the 4th and the 6th switching tube (Q
1, Q
3, Q
4, Q
6), described full-bridge circuit (3) comprise first, second, the 4th and the 5th switching tube (Q
1, Q
2, Q
4, Q
5), full-bridge circuit (3) shares the first and the 4th switching tube (Q with half-bridge three-level circuit (2)
1, Q
4), wherein: the 6th switching tube (Q
6) drain electrode connect the positive input terminal of power circuit (1), the 3rd switching tube (Q
3) source electrode connect the negative input end of power circuit (1), the 6th switching tube (Q
6) source electrode connect respectively the first fly-wheel diode (D
F1) negative electrode, striding capacitance (C
Ss) an end, the first switching tube (Q
1) drain electrode and the 5th switching tube (Q
5) drain electrode, the 3rd switching tube (Q
3) drain electrode connect respectively the second fly-wheel diode (D
F2) anode, striding capacitance (C
Ss) the other end, the 4th switching tube (Q
4) source electrode and second switch pipe (Q
2) source electrode, the first fly-wheel diode (D
F1) anode and the second fly-wheel diode (D
F2) tie point of negative electrode connects the first dividing potential drop electric capacity (C in the power circuit (1)
D1) other end and the second dividing potential drop electric capacity (C
D2) tie point of the other end; Described three-phase isolation transformer (4) is by a phase, b phase and c phase transformer (T
Ra, T
Rb, T
Rc) form a phase transformer (T
Ra) the A end of former limit winding is by the parasitic leakage inductance (L in the former limit of a phase transformer
Lka) connect respectively c phase transformer (T
Rc) B end and the first switching tube (Q of former limit winding
1) source electrode and the 4th switching tube (Q
4) drain electrode tie point, b phase transformer (T
Rb) the A end of former limit winding is by the parasitic leakage inductance (L in the former limit of b phase transformer
Lkb) connect respectively a phase transformer (T
Ra) B end and the first fly-wheel diode (D of former limit winding
F1) anode and the second fly-wheel diode (D
F2) tie point of negative electrode, c phase transformer (T
Rc) the A end of former limit winding is by the parasitic leakage inductance (L in the former limit of c phase transformer
Lkc) connect respectively b phase transformer (T
Rb) B end and the 5th switching tube (Q of former limit winding
5) source electrode and second switch pipe (Q
2) drain electrode tie point, a phase, b reach c phase transformer (T mutually
Ra, T
Rb, T
Rc) the B end of secondary winding interconnects; Described current rectifying and wave filtering circuit (5) comprises the first to the 6th rectifier diode (D
R1, D
R2, D
R3, D
R4, D
R5, D
R6), filter inductance (L
f) and filter capacitor (C
f), the first rectifier diode (D
R1) anode and the second rectifier diode (D
R2) tie point of negative electrode connects a phase transformer (T
Ra) the A end of secondary winding, the 3rd rectifier diode (D
R3) anode and the 4th rectifier diode (D
R4) tie point of negative electrode connects b phase transformer (T
Rb) the A end of secondary winding, the 5th rectifier diode (D
R5) anode and the 6th rectifier diode (D
R6) tie point of negative electrode connects c phase transformer (T
Rc) the A end of secondary winding, the first, the 3rd and the 5th rectifier diode (D
R1, D
R3, D
R5) negative electrode interconnect and connect filter inductance (L
f) an end, filter inductance (L
f) the other end connect respectively filter capacitor (C
f) an end and load (R
Ld) an end, the 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;
Described a phase, b phase and c phase transformer (T
Ra, T
Rb, T
Rc) former limit winding A end respectively the A of its corresponding secondary winding hold each other Same Name of Ends.
2. the symmetrical control method based on symmetrical control type three-phase tri-level DC converter claimed in claim 1 is characterized in that: the first to the 6th switching tube (Q
1, Q
2, Q
3, Q
4, Q
5, Q
6) ON time identical, the successively in turn conducting of switching tube that sequence number is adjacent, service time 1/6 switch periods of being separated by, the change in duty cycle scope of each switching tube is 1/6～1/3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010598995 CN102025280B (en) | 2010-12-22 | 2010-12-22 | Symmetry control type three-phase three-level direct current converter and symmetry control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010598995 CN102025280B (en) | 2010-12-22 | 2010-12-22 | Symmetry control type three-phase three-level direct current converter and symmetry control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102025280A CN102025280A (en) | 2011-04-20 |
| CN102025280B true CN102025280B (en) | 2013-01-23 |
Family
ID=43866247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010598995 Expired - Fee Related CN102025280B (en) | 2010-12-22 | 2010-12-22 | Symmetry control type three-phase three-level direct current converter and symmetry control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102025280B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102629836B (en) * | 2012-04-23 | 2014-09-17 | 山东大学 | Novel two-stage alternating-current photovoltaic module |
| CN102891602A (en) * | 2012-09-28 | 2013-01-23 | 江苏银佳企业集团有限公司 | Three-level DC converter |
| CN103501126B (en) * | 2013-09-09 | 2016-01-20 | 南京航空航天大学 | A kind of asymmetric control method of reduced form three-phase tri-level DC converter |
| CN103560674A (en) * | 2013-10-15 | 2014-02-05 | 南京航空航天大学 | Three-phase three-level LLC resonance direct current converter and control method of three-phase three-level LLC resonance direct current converter |
| CN103595246B (en) * | 2013-11-07 | 2016-07-20 | 南京航空航天大学 | A kind of bi-frequency control Combined three phase three-level DC converter and control method thereof |
| JP6512064B2 (en) * | 2015-10-29 | 2019-05-15 | Tdk株式会社 | Switching power supply |
| CN111711373B (en) * | 2020-04-16 | 2022-03-18 | 山西大学 | Transformer-assisted PWM three-level zero-voltage soft switching inverter |
| CN112087142B (en) * | 2020-08-18 | 2021-09-07 | 东南大学 | ZCS direct current converter with minimized follow current power and working steps thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699692A (en) * | 2009-11-09 | 2010-04-28 | 西安工程大学 | Series connection type voltage transient variation compensation control circuit and control method |
| CN101771351A (en) * | 2009-01-07 | 2010-07-07 | 力博特公司 | Three-phase tri-level LLC resonant converter |
-
2010
- 2010-12-22 CN CN 201010598995 patent/CN102025280B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771351A (en) * | 2009-01-07 | 2010-07-07 | 力博特公司 | Three-phase tri-level LLC resonant converter |
| CN101699692A (en) * | 2009-11-09 | 2010-04-28 | 西安工程大学 | Series connection type voltage transient variation compensation control circuit and control method |
Non-Patent Citations (3)
| Title |
|---|
| 刘福鑫等.一种新颖的零电压开关PWM组合式三电平变换器.《中国电机工程学报》.2005,第25卷(第22期), * |
| 刘福鑫等.零电压零电流开关PWM组合式三电平变换器.《中国电机工程学报》.2007,第27卷(第04期), * |
| 汤天浩等.一种多电平逆变电路新的组合方式.《电工技术学报》.2008,第23卷(第02期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102025280A (en) | 2011-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102025280B (en) | Symmetry control type three-phase three-level direct current converter and symmetry control method thereof | |
| Hu et al. | A high gain input-parallel output-series DC/DC converter with dual coupled inductors | |
| CN102611310B (en) | Magnetic integrated self-driving current-double rectification half-bridge three-level direct-current converter | |
| CN100405727C (en) | PWM combined three level DC converter for zero voltage current switch | |
| CN101795061B (en) | Passive lossless snubber circuit suitable for current source isolating full-bridge boost topology | |
| CN105141138A (en) | Voltage-doubling type soft switching push-pull DC converter | |
| CN101635530B (en) | Single-stage forward type high-frequency linked inverter | |
| CN103560674A (en) | Three-phase three-level LLC resonance direct current converter and control method of three-phase three-level LLC resonance direct current converter | |
| CN101847936B (en) | Soft switching full-bridge direct-current converter with lag leg connected with auxiliary network in parallel | |
| CN108235509B (en) | A kind of single-stage LED drive circuit of integrated decompression Cuk and LLC circuit | |
| CN100379137C (en) | Zero valtage switch compound crisscross parallel two-tube positive shock three-level DC inverter | |
| CN100353652C (en) | Combined type full-bridge three-level DC converter and full-bridge three-level DC converter | |
| CN100539373C (en) | Zero-voltage switch half-bridge three-level direct current converter | |
| CN103595258A (en) | Boost type soft switching resonant converter and frequency fixing control method thereof | |
| CN105939112A (en) | High-gain quasi-switch boost DC-DC converter | |
| CN103607108A (en) | Transformer primary side multi-stage passive clamp circuit of full-bridge single-stage power factor corrector | |
| CN105939108A (en) | Switch inductor type quasi-switch voltage-boosting DC-DC converter | |
| CN102136792A (en) | Boost double-voltage power factor correction circuit utilizing reverse blocking IGBT | |
| CN1937381A (en) | Zero-voltage switch full-bridge direct current converter | |
| CN103427686B (en) | Near zero current-ripple inversion and rectification circuits | |
| CN103647448A (en) | Integrated step-down-flyback type high power factor constant current circuit and device | |
| CN203617902U (en) | Integrated buck-flyback type high power factor constant current circuit and device | |
| CN100539374C (en) | Zero-voltage switch combined full-bridge three-level direct current converter | |
| CN105553271A (en) | Control method of three-phase DC converter | |
| CN101895199B (en) | Isolation type Buck-Boost direct current converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20141222 |
|
| EXPY | Termination of patent right or utility model |