CN101388609A - Low voltage wide input push-pull positive stimulate three level DC converter and controlling method thereof - Google Patents
Low voltage wide input push-pull positive stimulate three level DC converter and controlling method thereof Download PDFInfo
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- CN101388609A CN101388609A CNA2008102349628A CN200810234962A CN101388609A CN 101388609 A CN101388609 A CN 101388609A CN A2008102349628 A CNA2008102349628 A CN A2008102349628A CN 200810234962 A CN200810234962 A CN 200810234962A CN 101388609 A CN101388609 A CN 101388609A
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Abstract
The invention discloses a low voltage wide input push-pull forward three-level direct current convertor and a method for controlling the convertor, which belong to direct current convertors and methods for controlling the convertors. The convertor of the invention is composed of an input dividing capacitance circuit, a first level branch, a second level branch, a third level branch, a clamping capacitor, an insulating transformer, a rectifier bridge and a filter circuit. The method for controlling the convertor of the invention comprises: driving signals of a first power switch tube and a fifth power switch tube are complementary, the driving signals of a fourth power switch tube and a sixth power switch tube are complementary, two working modes of three levels and two levels exist, in the three level working mode, a second power switch tube and a third power switch tube are conducted complementarily for 180 degrees, the first power switch tube and the fourth power switch are modulated by PWM, in two level working mode, the first power switch tube and the fourth power switch tube are cut normally, the fifth power switch tube and the sixth power switch tube are conducted normally, and the second power switch tube and the third power switch tube work by PWM. The invention reduces the conducting loss, improves the conversion efficiency, and saves a flying capacitor.
Description
Technical field
The present invention relates to a kind of DC converter and control method thereof of transformation of electrical energy device, relate in particular to a kind of low voltage wide input push-pull ortho-exciting three-level DC inverter and control method thereof.
Background technology
Along with the continuous aggravation of the continuous in short supply and environmental pollution of fossil energy, become the focus of present research based on the distributed generation system of new and renewable sources of energy, straight convertor is one of them important component part.And new and renewable sources of energy, as: fuel cell, photovoltaic cell etc., output voltage changes with the variation of load and environment, the excursion broad.The tradition push-pull ortho-exciting three-level DC inverter owing to can be operated in three level and 2 kinds of mode of operations of two level, also is suitable for the occasion of wide input voltage except that the voltage stress that can reduce power switch pipe.But it is the same that 2 kinds of all power switch pipe voltage stress sums of mode of operation and tradition are recommended forward DC-DC converter, be 4 times input voltage, and traditional push-pull ortho-exciting three-level DC inverter generally needs the voltage of striding capacitance clamp power switch pipe.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of low voltage wide input push-pull ortho-exciting three-level DC inverter and control method thereof at the defective that prior art exists.
Low voltage wide input push-pull ortho-exciting three-level DC inverter of the present invention, comprise input dividing potential drop condenser network and current rectifying and wave filtering circuit, wherein import the dividing potential drop condenser network and comprise input power supply, the first input dividing potential drop electric capacity, the second input dividing potential drop electric capacity, current rectifying and wave filtering circuit comprises four rectifier diodes i.e. first rectifier diode to the, four rectifier diodes, filter inductance, filter capacitor; The anode that the positive pole of input power supply connects the first input dividing potential drop electric capacity constitutes the positive output end of importing the dividing potential drop condenser network, the negative terminal that the negative pole of input power supply connects the second input dividing potential drop electric capacity constitutes the negative output terminal of importing the dividing potential drop condenser network, and the anode that the negative terminal of the first input dividing potential drop electric capacity connects the second input dividing potential drop electric capacity constitutes the middle-end of importing the dividing potential drop condenser network; The negative electrode of first rectifier diode connects the negative electrode of the 3rd rectifier diode and the input of filter inductance respectively, the anode of the output termination filter capacitor of filter inductance, the negative terminal of filter capacitor connects the anode of the 4th rectifier diode and the anode of second rectifier diode, the negative electrode of second rectifier diode connects the anode of first rectifier diode, and the negative electrode of the 4th rectifier diode connects the anode of the 3rd rectifier diode;
Also comprise the one or three level branch road, the two or three level branch road, isolating transformer and a clamping capacitance, wherein the one or three level branch road comprises first power switch pipe, second power switch pipe and the 5th power switch pipe, the two or three level branch road comprises the 3rd power switch pipe, the 4th power switch pipe and the 6th power switch pipe, and isolating transformer comprises the first former limit winding, the second former limit winding and secondary winding; The source electrode of the 5th power switch pipe connects the middle-end of input dividing potential drop condenser network, the drain electrode of the 5th power switch pipe connects the drain electrode of the source electrode and second power switch pipe of first power switch pipe respectively, the drain electrode of first power switch pipe connects the different name end of the second former limit winding of the positive output end of input dividing potential drop condenser network and isolating transformer respectively, the source electrode of second power switch pipe connects the end of the same name of the first former limit winding of the negative terminal of clamping capacitance and isolating transformer respectively, the end of the same name of the second former limit winding of isolating transformer connects the drain electrode of the anode and the 3rd power switch pipe of clamping capacitance respectively, the source electrode of the 3rd power switch pipe connects the drain electrode of the 4th power switch pipe and the source electrode of the 6th power switch pipe respectively, the drain electrode of the 6th power switch pipe connects the middle-end of input dividing potential drop condenser network, the different name end of the first former limit winding of isolating transformer connects the source electrode of the 4th power switch pipe and the negative output terminal of input dividing potential drop condenser network respectively, the end of the same name of the secondary winding of isolating transformer connects the anode of first rectifier diode and the negative electrode of second rectifier diode respectively, and the different name end of the secondary winding of isolating transformer connects the anode and the 4th rectifier diode negative electrode of the 3rd rectifier diode respectively.
The control method of low voltage wide input push-pull ortho-exciting three-level DC inverter is passed through adjusted signal behind the Voltage loop adjuster with the output voltage and the given reference voltage of the low voltage wide input push-pull ortho-exciting three-level DC inverter of sampling; The first sawtooth waveforms carrier signal that saw-toothed wave generator is produced obtains the second sawtooth waveforms carrier signal through dc bias circuit;
When the low voltage wide input push-pull ortho-exciting three-level DC inverter is in three level modes, with described conditioning signal and the first sawtooth waveforms carrier signal successively through first comparator, first logic switch produces the switching signal that circuit obtains second power switch pipe and the 3rd power switch pipe respectively, the switching signal of second power switch pipe is obtained the drive signal of second power switch pipe through second drive circuit, the switching signal of the 3rd power switch pipe is obtained the drive signal of the 3rd power switch pipe through the 3rd drive circuit, and the drive signal of the drive signal of described second power switch pipe and the 3rd power switch pipe is the i.e. 180 ° of complementary conductings shutoffs of second power switch pipe and the 3rd power switch pipe of 180 ° of complementary signals; With described conditioning signal and the second sawtooth waveforms carrier signal successively through second comparator, second logic switch produces the switching signal that circuit obtains first power switch pipe and the 4th power switch pipe respectively, is that first power switch pipe is the PWM modulation with the switching signal of first power switch pipe through the PWM drive signal that first drive circuit obtains first power switch pipe, the switching signal of first power switch pipe is obtained the drive signal of the 5th power switch pipe respectively through first inverter and the 5th drive circuit, the PWM drive signal that the switching signal of the 4th power switch pipe is obtained the 4th power switch pipe through the moving circuit of 4 wheel driven i.e. the 4th power switch pipe is the PWM modulation and differs 180 ° with the drive signal of first power switch pipe, the switching signal of the 4th power switch pipe is obtained the drive signal of the 6th power switch pipe respectively through second inverter and the 6th drive circuit, wherein the drive signal of the drive signal of first power switch pipe and the 5th power switch pipe is i.e. first power switch pipe and the 5th a power switch pipe alternate conduction of complementary signal, turn-off, the drive signal of the drive signal of the 4th power switch pipe and the 6th power switch pipe is i.e. the 4th power switch pipe and the 6th a power switch pipe alternate conduction of complementary signal, turn-off;
When the low voltage wide input push-pull ortho-exciting three-level DC inverter is in two level modes, with described conditioning signal and the first sawtooth waveforms carrier signal successively through first comparator, first logic switch produces the switching signal that circuit obtains second power switch pipe and the 3rd power switch pipe respectively, the PWM drive signal that the switching signal of second power switch pipe is obtained second power switch pipe through second drive circuit i.e. second power switch pipe is the PWM modulation, and the PWM drive signal that the switching signal of the 3rd power switch pipe is obtained the 3rd power switch pipe through the 3rd drive circuit i.e. the 3rd power switch pipe is the PWM modulation and differs 180 ° with the drive signal of second power switch pipe; With described conditioning signal and the second sawtooth waveforms carrier signal successively through second comparator, second logic switch produces the switching signal that circuit obtains first power switch pipe and the 4th power switch pipe respectively, is the first power switch pipe normal off with the switching signal of first power switch pipe through the low level drive signal that first drive circuit obtains first power switch pipe, the high level drive signal that the switching signal of first power switch pipe is obtained the 5th power switch pipe through first inverter and the 5th drive circuit respectively i.e. the 5th power switch pipe normal open, the low level drive signal that the switching signal of the 4th power switch pipe is obtained the 4th power switch pipe through the moving circuit of 4 wheel driven i.e. the 4th power switch pipe normal off, and the high level drive signal that the switching signal of the 4th power switch pipe is obtained the 6th power switch pipe through second inverter and the 6th drive circuit respectively i.e. the 6th power switch pipe normal open.
The present invention is suitable for the occasion of the wide input of low pressure; Need not the voltage of striding capacitance clamp power switch pipe; Can reduce the voltage stress of second power switch pipe and the 3rd power switch pipe under two level modes, thereby can select power switch pipe, reduce conduction loss than low on-resistance.
Description of drawings
Fig. 1: circuit topology figure of the present invention;
Fig. 2: control principle figure of the present invention;
Fig. 3: the main waveform schematic diagram of the present invention's three level mode of operations;
Fig. 4: the main waveform schematic diagram of the present invention's two level mode of operations;
Fig. 5: switch mode 1 equivalent circuit structure schematic diagram under the present invention's three level mode of operations and the two level mode of operations;
Fig. 6: switch mode 2 equivalent circuit structure schematic diagrames under the present invention's three level mode of operations;
Fig. 7: switch mode 2 equivalent circuit structure schematic diagrames under the present invention's two level mode of operations.
Main designation among the figure: U
In: input power supply, C
1, C
2: first, second input dividing potential drop electric capacity, S
1～S
6: first to the 6th power switch pipe, C: clamping capacitance, N
P1, N
P2, N
S: first, second of isolating transformer former limit winding and secondary winding, D
1～D
4: first to fourth output rectifier diode, L
f: filter inductance, C
f: filter capacitor, R
L: load, U
o: output voltage, u
AB: A and B point-to-point transmission voltage.
Embodiment
As shown in Figure 1.The low voltage wide input push-pull ortho-exciting three-level DC inverter comprises input dividing potential drop condenser network 1 and current rectifying and wave filtering circuit 5, wherein imports dividing potential drop condenser network 1 and comprises input power supply U
In, the first input dividing potential drop capacitor C
1, the second input dividing potential drop capacitor C
2, current rectifying and wave filtering circuit 5 comprises the i.e. first rectifier diode D of four rectifier diodes
1To the 4th rectifier diode D
4, filter inductance L
f, filter capacitor C
fInput power supply U
InThe positive pole anode that connects the first input dividing potential drop capacitor C 1 constitute the positive output end of input dividing potential drop condenser network 1, input power supply U
InNegative pole connect the second input dividing potential drop capacitor C
2Negative terminal constitute the negative output terminal of input dividing potential drop condenser network 1, the first input dividing potential drop capacitor C
1Negative terminal connect the second input dividing potential drop capacitor C
2Anode constitute the middle-end of input dividing potential drop condenser network 1; The first rectifier diode D
1Negative electrode meet the 3rd rectifier diode D respectively
3Negative electrode and filter inductance L
fInput, filter inductance L
fOutput termination filter capacitor C
fAnode, filter capacitor C
fNegative terminal meet the 4th rectifier diode D
4The anode and the second rectifier diode D
2Anode, the second rectifier diode D
2Negative electrode meet the first rectifier diode D
1Anode, the 4th rectifier diode D
4Negative electrode meet the 3rd rectifier diode D
3Anode;
Also comprise the one or three level branch road the 2, the 23 level branch road 3, isolating transformer 4 and a clamping capacitance C, wherein the one or three level branch road 2 comprises first power switch tube S
1, second power switch tube S
2With the 5th power switch tube S
5, the two or three level branch road 3 comprises the 3rd power switch tube S
3, the 4th power switch tube S
4With the 6th power switch tube S
6, isolating transformer 4 comprises the first former limit winding N
P1, the second former limit winding N
P2With secondary winding N
SThe 5th power switch tube S
5Source electrode connect the middle-end of input dividing potential drop condenser network 1, the 5th power switch tube S
5Drain electrode connect first power switch tube S respectively
1The source electrode and second power switch tube S
2Drain electrode, first power switch tube S
1Drain electrode meet the positive output end of input dividing potential drop condenser network 1 and the second former limit winding N of isolating transformer respectively
P2The different name end, second power switch tube S
2Source electrode meet the negative terminal of clamping capacitance C and the first former limit winding N of isolating transformer respectively
P1End of the same name, the second former limit winding N of isolating transformer
P2End of the same name connect anode and the 3rd power switch tube S of clamping capacitance C respectively
3Drain electrode, the 3rd power switch tube S
3Source electrode connect the 4th power switch tube S respectively
4Drain electrode and the 6th power switch tube S
6Source electrode, the 6th power switch tube S
6Drain electrode connect the middle-end of input dividing potential drop condenser network 1, the first former limit winding N of isolating transformer
P1The different name end connect the 4th power switch tube S respectively
4Source electrode and the negative output terminal of input dividing potential drop condenser network 1, the secondary winding N of isolating transformer
SEnd of the same name meet the first rectifier diode D respectively
1The anode and the second rectifier diode D
2Negative electrode, the secondary winding N of isolating transformer
SThe different name end meet the 3rd rectifier diode D respectively
3Anode and the 4th rectifier diode D
4Negative electrode.
As shown in Figure 2, the control method of described low voltage wide input push-pull ortho-exciting three-level DC inverter is with the output voltage U of low voltage wide input push-pull ortho-exciting three-level DC inverter of sampling
oWith given reference voltage U
rThrough adjusted signal U behind the Voltage loop adjuster
eThe first sawtooth waveforms carrier signal that saw-toothed wave generator is produced obtains the second sawtooth waveforms carrier signal through dc bias circuit;
When the low voltage wide input push-pull ortho-exciting three-level DC inverter is in three level modes, with described conditioning signal U
eProduce circuit through first comparator, first logic switch successively with the first sawtooth waveforms carrier signal and obtain second power switch tube S respectively
2With the 3rd power switch tube S
3Switching signal, with second power switch tube S
2Switching signal obtain second power switch tube S through second drive circuit
2Drive signal, with the 3rd power switch tube S
3Switching signal obtain the 3rd power switch tube S through the 3rd drive circuit
3Drive signal, described second power switch tube S
2Drive signal and the 3rd power switch tube S
3Drive signal be i.e. second power switch tube S of 180 ° of complementary signals
2With the 3rd power switch tube S
3180 ° of complementary conductings are turn-offed; With described conditioning signal U
eProduce circuit through second comparator, second logic switch successively with the second sawtooth waveforms carrier signal and obtain first power switch tube S respectively
1With the 4th power switch tube S
4Switching signal, with first power switch tube S
1Switching signal obtain first power switch tube S through first drive circuit
1I.e. first power switch tube S of PWM drive signal
1For the PWM modulation, with first power switch tube S
1Switching signal obtain the 5th power switch tube S through first inverter and the 5th drive circuit respectively
5Drive signal, with the 4th power switch tube S
4Switching signal obtain the 4th power switch tube S through the moving circuit of 4 wheel driven
4I.e. the 4th power switch tube S of PWM drive signal
4For PWM modulation and with first power switch tube S
1Drive signal differ 180 °, with the 4th power switch tube S
4Switching signal obtain the 6th power switch tube S through second inverter and the 6th drive circuit respectively
6Drive signal, first power switch tube S wherein
1Drive signal and the 5th power switch tube S
5Drive signal be i.e. first power switch tube S of complementary signal
1With the 5th power switch tube S
5Alternate conduction, shutoff, the 4th power switch tube S
4Drive signal and the 6th power switch tube S
6Drive signal be i.e. the 4th power switch tube S of complementary signal
4With the 6th power switch tube S
6Alternate conduction, shutoff;
When the low voltage wide input push-pull ortho-exciting three-level DC inverter is in two level modes, with described conditioning signal U
eProduce circuit through first comparator, first logic switch successively with the first sawtooth waveforms carrier signal and obtain second power switch tube S respectively
2With the 3rd power switch tube S
3Switching signal, with second power switch tube S
2Switching signal obtain second power switch tube S through second drive circuit
2I.e. second power switch tube S of PWM drive signal
2For the PWM modulation, with the 3rd power switch tube S
3Switching signal obtain the 3rd power switch tube S through the 3rd drive circuit
3I.e. the 3rd power switch tube S of PWM drive signal
3For PWM modulation and with second power switch tube S
2Drive signal differ 180 °; With described conditioning signal U
eProduce circuit through second comparator, second logic switch successively with the second sawtooth waveforms carrier signal and obtain first power switch tube S respectively
1With the 4th power switch tube S
4Switching signal, with first power switch tube S
1Switching signal obtain first power switch tube S through first drive circuit
1I.e. first power switch tube S of low level drive signal
1Normal off is with first power switch tube S
1Switching signal respectively through first inverter and the 5th drive circuit S
5I.e. the 5th power switch tube S of high level drive signal
5Normal open is with the 4th power switch tube S
4Switching signal obtain the 4th power switch tube S through the moving circuit of 4 wheel driven
4I.e. the 4th power switch tube S of low level drive signal
4Normal off is with the 4th power switch tube S
4Switching signal obtain the 6th power switch tube S through second inverter and the 6th drive circuit respectively
6I.e. the 6th power switch tube S of high level drive signal
6Normal open.
Suitable low voltage wide input push-pull ortho-exciting three-level DC inverter main circuit of the present invention is made up of input dividing potential drop condenser network 1, first, second three level branch road 2,3, clamping capacitance C, isolating transformer 4, rectifier bridge and filter circuit 5.Wherein, dividing potential drop capacitor C
1And C
2Capacity is very big and equal, and its voltage is input power supply U
InHalf of voltage U, i.e. U
C1=U
C2=U/2 can regard the voltage source that voltage is U/2 as.
Control method is as follows: do not consider the dead band between the power switch pipe, the switching time of time-delay and power switch pipe, first power switch tube S
1Drive signal and the 5th power switch tube S
5The drive signal complementation; The 4th power switch tube S
4Drive signal and the 6th power switch tube S
6The drive signal complementation.There are three level and 2 kinds of mode of operations of two level, when being in three level mode of operations, second power switch tube S
2With the 3rd power switch tube S
3180 ° of complementary conductings, first power switch tube S
1With the 4th power switch tube S
4Carry out work with the PWM working method; When being in two level mode of operations, first power switch tube S
1With the 4th power switch tube S
4Normal off is that duty ratio is 0, the five power switch tube S
5With the 6th power switch tube S
6Normal open is that duty ratio is 1, the second power switch tube S
2With the 3rd power switch tube S
3Carry out work with the PWM working method.
Under three level mode of operations, the first, the 4th power switch tube S
1And S
4Have two kinds of switching modes: a kind of is the first, the 4th power switch tube S
1And S
4Respectively with the 5th, the 6th power switch tube S
5And S
6Turn-off simultaneously, promptly 1/2 level appears earlier in transformer secondary commutating voltage, and 1 level appears in the back; Another kind is the first, the 4th power switch tube S
1And S
4Respectively with the 5th, the 6th power switch tube S
5And S
6Open-minded simultaneously, promptly 1 level appears earlier in transformer secondary commutating voltage, and 1/2 level appears in the back.
With first kind of power switch tube S
1And S
4Switching mode be example, narrate concrete operation principle under the present invention's three level modes in conjunction with Fig. 5～Fig. 6.
Whole converter has 4 kinds of switch mode a switch periods as shown in Figure 3, is respectively [t
0[t in the past],
0, t
1], [t
1, t
2], [t
2, t
3], [t wherein
0In the past, t
1] be the preceding half period, [t
1, t
3] be the later half cycle.Below the working condition of each switch mode is made a concrete analysis of.
Before analyzing, make the following assumptions: 1. all power switch pipes and diode are desirable device, do not consider switching time, conduction voltage drop; 2. all inductance, electric capacity and transformer are ideal element, N
P1=N
P2=N
P, N
S/ N
P=n; 3. clamping capacitance C is enough big, and its voltage approximately constant is U during stable state.
1. switch mode 1[t
0[corresponding to Fig. 5] in the past]
t
0In the past, the second, the 5th, the 6th power switch tube S
2, S
5, S
6Conducting, other power switch pipe turn-offs.AB point-to-point transmission voltage is u
AB=nU/2.Five, the 6th power switch tube S
5And S
6Conducting has guaranteed the first, the 4th power switch tube S
1And S
4The voltage that bears all is U/2, then the 3rd power switch tube S
3The voltage that bears is 3U/2, therefore need not striding capacitance clamp the 3rd power switch tube S
3Voltage.Secondary first, the 4th rectifier diode D
1And D
4Conducting, second, third rectifier diode D
2And D
3End.Energy is transmitted to secondary in former limit.
2. switch mode 2[t
0, t
1] [corresponding to Fig. 6]
t
0Constantly turn-off the 5th power switch tube S
5, first power switch tube S
1Conducting, the second, the 6th power switch tube S
2, S
6Keep conducting.The 5th power switch tube S
5The voltage that bears is U/2.u
ABVoltage rises to nU.Energy is transmitted to secondary in former limit.
After this 3rd, the 5th power switch tube S
3And S
5Conducting, first, second power switch tube S
1And S
2Turn-off, former limit provides energy to secondary.Converter begins second half cycling.
Whole converter has 4 kinds of switch mode a switch periods under two level mode of operations as shown in Figure 4, is respectively [t
0[t in the past],
0, t
1], [t
1, t
2], [t
2, t
3], [t wherein
0In the past, t
1] be the preceding half period, [t
1, t
3] be the later half cycle.Below the working condition of each switch mode is made a concrete analysis of.
1. switch mode 1[t
0[corresponding to Fig. 5] in the past]
t
0In the past, second power switch tube S
2Conducting, AB point-to-point transmission voltage is u
AB=nU/2.Because the 5th, the 6th power switch tube S under the two level mode of operations
5And S
6Normal open, the first, the 4th power switch tube S
1And S
4Normal off, therefore, the first, the 4th power switch tube S
1And S
4The voltage that bears all is U/2, then the 3rd power switch tube S
3The voltage that bears is U, reduces U/2 than voltage stress under three level modes.Secondary first, the 4th rectifier diode D
1And D
4Conducting, second, third D
2And D
3End.Energy is transmitted to secondary in former limit.
2. switch mode 2[t
0, t
1] [corresponding to Fig. 7]
t
0Constantly turn-off S
2, power switch tube S
1, S
2, S
3And S
4The voltage that bears all is U/2.u
ABVoltage drops to zero, secondary first to fourth rectifier diode D
1～D
4Conducting, the secondary afterflow.
After this 3rd power switch tube S
3Conducting, former limit provides energy to secondary.Converter begins second half cycling.
By last surface analysis as can be known, power switch tube S under the two level mode of operations
2And S
3Voltage stress reduced U/2 than traditional three level push-pull ortho-exciting DC converter.
Claims (2)
1. a low voltage wide input push-pull ortho-exciting three-level DC inverter comprises input dividing potential drop condenser network (1) and current rectifying and wave filtering circuit (5), wherein imports dividing potential drop condenser network (1) and comprises input power supply (U
In), the first input dividing potential drop electric capacity (C
1), the second input dividing potential drop electric capacity (C
2), current rectifying and wave filtering circuit (5) comprises the i.e. first rectifier diode (D of four rectifier diodes
1) to the 4th rectifier diode (D
4), filter inductance (L
f), filter capacitor (C
f); Input power supply (U
In) positive pole connect the first input dividing potential drop electric capacity (C
1) anode constitute the positive output end of input dividing potential drop condenser network (1), input power supply (U
In) negative pole connect the second input dividing potential drop electric capacity (C
2) negative terminal constitute the negative output terminal of input dividing potential drop condenser network (1), the first input dividing potential drop electric capacity (C
1) negative terminal connect the second input dividing potential drop electric capacity (C
2) anode constitute the middle-end of input dividing potential drop condenser network (1); First rectifier diode (the D
1) negative electrode meet the 3rd rectifier diode (D respectively
3) negative electrode and filter inductance (L
f) input, filter inductance (L
f) output termination filter capacitor (C
f) anode, filter capacitor (C
f) negative terminal meet the 4th rectifier diode (D
4) the anode and the second rectifier diode (D
2) anode, the second rectifier diode (D
2) negative electrode meet the first rectifier diode (D
1) anode, the 4th rectifier diode (D
4) negative electrode meet the 3rd rectifier diode (D
3) anode;
It is characterized in that: also comprise the one or three level branch road (2), the two or three level branch road (3), isolating transformer (4) and a clamping capacitance (C), wherein the one or three level branch road (2) comprises the first power switch pipe (S
1), the second power switch pipe (S
2) and the 5th power switch pipe (S
5), the two or three level branch road (3) comprises the 3rd power switch pipe (S
3), the 4th power switch pipe (S
4) and the 6th power switch pipe (S
6), isolating transformer (4) comprises the first former limit winding (N
P1), the second former limit winding (N
P2) and secondary winding (N
S); The 5th power switch pipe (S
5) source electrode connect the input dividing potential drop condenser network (1) middle-end, the 5th power switch pipe (S
5) drain electrode meet the first power switch pipe (S respectively
1) source electrode, the second power switch pipe (S
2) drain electrode, the first power switch pipe (S
1) drain electrode connect respectively the input dividing potential drop condenser network (1) positive output end and the second former limit winding (N of isolating transformer
P2) the different name end, the second power switch pipe (S
2) source electrode meet the negative terminal of clamping capacitance (C) and the first former limit winding (N of isolating transformer respectively
P1) end of the same name, the second former limit winding (N of isolating transformer
P2) end of the same name meet the anode and the 3rd power switch pipe (S of clamping capacitance (C) respectively
3) drain electrode, the 3rd power switch pipe (S
3) source electrode meet the 4th power switch pipe (S respectively
4) drain electrode and the 6th power switch pipe (S
6) source electrode, the 6th power switch pipe (S
6) drain electrode connect the input dividing potential drop condenser network (1) middle-end, the first former limit winding (N of isolating transformer
P1) the different name end meet the 4th power switch pipe (S respectively
4) source electrode and the input dividing potential drop condenser network (1) negative output terminal, the secondary winding (N of isolating transformer
S) end of the same name meet the first rectifier diode (D respectively
1) the anode and the second rectifier diode (D
2) negative electrode, the secondary winding (N of isolating transformer
S) the different name end meet the 3rd rectifier diode (D respectively
3) anode and the 4th rectifier diode (D
4) negative electrode.
2. control method based on the described low voltage wide input push-pull ortho-exciting three-level DC inverter of claim 1 is characterized in that: with the output voltage (U of the low voltage wide input push-pull ortho-exciting three-level DC inverter of sampling
o) and given reference voltage (U
r) through adjusted signal (U behind the Voltage loop adjuster
e); The first sawtooth waveforms carrier signal that saw-toothed wave generator is produced obtains the second sawtooth waveforms carrier signal through dc bias circuit;
When the low voltage wide input push-pull ortho-exciting three-level DC inverter is in three level modes, with described conditioning signal (U
e) obtain the second power switch pipe (S respectively through first comparator, first logic switch generation circuit successively with the first sawtooth waveforms carrier signal
2) and the 3rd power switch pipe (S
3) switching signal, with the second power switch pipe (S
2) switching signal obtain the second power switch pipe (S through second drive circuit
2) drive signal, with the 3rd power switch pipe (S
3) switching signal obtain the 3rd power switch pipe (S through the 3rd drive circuit
3) drive signal, the described second power switch pipe (S
2) drive signal and the 3rd power switch pipe (S
3) drive signal be the i.e. second power switch pipe (S of 180 ° of complementary signals
2) and the 3rd power switch pipe (S
3) 180 ° of complementary conductings turn-off; With described conditioning signal (U
e) obtain the first power switch pipe (S respectively through second comparator, second logic switch generation circuit successively with the second sawtooth waveforms carrier signal
1) and the 4th power switch pipe (S
4) switching signal, with the first power switch pipe (S
1) switching signal obtain the first power switch pipe (S through first drive circuit
1) the i.e. first power switch pipe (S of PWM drive signal
1) for the PWM modulation, with the first power switch pipe (S
1) switching signal obtain the 5th power switch pipe (S through first inverter and the 5th drive circuit respectively
5) drive signal, with the 4th power switch pipe (S
4) switching signal obtain the 4th power switch pipe (S through the moving circuit of 4 wheel driven
4) i.e. the 4th power switch pipe (S of PWM drive signal
4) for PWM modulation and with the first power switch pipe (S
1) drive signal differ 180 °, with the 4th power switch pipe (S
4) switching signal obtain the 6th power switch pipe (S through second inverter and the 6th drive circuit respectively
6) drive signal, the first power switch pipe (S wherein
1) drive signal and the 5th power switch pipe (S
5) drive signal be the i.e. first power switch pipe (S of complementary signal
1) and the 5th power switch pipe (S
5) alternate conduction, shutoff, the 4th power switch pipe (S
4) drive signal and the 6th power switch pipe (S
6) drive signal be i.e. the 4th power switch pipe (S of complementary signal
4) and the 6th power switch pipe (S
6) alternate conduction, shutoff;
When the low voltage wide input push-pull ortho-exciting three-level DC inverter is in two level modes, with described conditioning signal (U
e) obtain the second power switch pipe (S respectively through first comparator, first logic switch generation circuit successively with the first sawtooth waveforms carrier signal
2) and the 3rd power switch pipe (S
3) switching signal, with the second power switch pipe (S
2) switching signal obtain the second power switch pipe (S through second drive circuit
2) the i.e. second power switch pipe (S of PWM drive signal
2) for the PWM modulation, with the 3rd power switch pipe (S
3) switching signal obtain the 3rd power switch pipe (S through the 3rd drive circuit
3) i.e. the 3rd power switch pipe (S of PWM drive signal
3) for PWM modulation and with the second power switch pipe (S
2) drive signal differ 180 °; With described conditioning signal (U
e) obtain the first power switch pipe (S respectively through second comparator, second logic switch generation circuit successively with the second sawtooth waveforms carrier signal
1) and the 4th power switch pipe (S
4) switching signal, with the first power switch pipe (S
1) switching signal obtain the first power switch pipe (S through first drive circuit
1) the i.e. first power switch pipe (S of low level drive signal
1) normal off, with the first power switch pipe (S
1) switching signal obtain the 5th power switch pipe (S through first inverter and the 5th drive circuit respectively
5) i.e. the 5th power switch pipe (S of high level drive signal
5) normal open, with the 4th power switch pipe (S
4) switching signal obtain the 4th power switch pipe (S through the moving circuit of 4 wheel driven
4) i.e. the 4th power switch pipe (S of low level drive signal
4) normal off, with the 4th power switch pipe (S
4) switching signal obtain the 6th power switch pipe (S through second inverter and the 6th drive circuit respectively
6) i.e. the 6th power switch pipe (S of high level drive signal
6) normal open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102349628A CN101388609B (en) | 2008-11-05 | 2008-11-05 | Low voltage wide input push-pull positive stimulate three level DC converter and controlling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102349628A CN101388609B (en) | 2008-11-05 | 2008-11-05 | Low voltage wide input push-pull positive stimulate three level DC converter and controlling method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101388609A true CN101388609A (en) | 2009-03-18 |
| CN101388609B CN101388609B (en) | 2010-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102349628A Expired - Fee Related CN101388609B (en) | 2008-11-05 | 2008-11-05 | Low voltage wide input push-pull positive stimulate three level DC converter and controlling method thereof |
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| Country | Link |
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| CN (1) | CN101388609B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969898A (en) * | 2012-11-29 | 2013-03-13 | 盐城工学院 | Low-voltage wide-input three-level full-bridge converter and control method thereof |
| CN103560672A (en) * | 2013-10-29 | 2014-02-05 | 南京邮电大学 | Optimal control method for three-level flyback converter |
| CN103888010A (en) * | 2014-03-26 | 2014-06-25 | 南京理工大学 | High-frequency isolated type three-level inverter based on push-pull converter |
| CN106877682A (en) * | 2017-03-27 | 2017-06-20 | 盐城工学院 | A kind of three level straight convertors |
| CN113012907A (en) * | 2021-02-26 | 2021-06-22 | 西安微电子技术研究所 | Flat-plate transformer of bias-free voltage push-pull circuit |
| CN113497572A (en) * | 2020-04-08 | 2021-10-12 | 株洲中车时代电气股份有限公司 | Carrier modulation system and method |
-
2008
- 2008-11-05 CN CN2008102349628A patent/CN101388609B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969898A (en) * | 2012-11-29 | 2013-03-13 | 盐城工学院 | Low-voltage wide-input three-level full-bridge converter and control method thereof |
| CN103560672A (en) * | 2013-10-29 | 2014-02-05 | 南京邮电大学 | Optimal control method for three-level flyback converter |
| CN103888010A (en) * | 2014-03-26 | 2014-06-25 | 南京理工大学 | High-frequency isolated type three-level inverter based on push-pull converter |
| CN106877682A (en) * | 2017-03-27 | 2017-06-20 | 盐城工学院 | A kind of three level straight convertors |
| CN113497572A (en) * | 2020-04-08 | 2021-10-12 | 株洲中车时代电气股份有限公司 | Carrier modulation system and method |
| CN113497572B (en) * | 2020-04-08 | 2022-07-29 | 株洲中车时代电气股份有限公司 | Carrier modulation system and method |
| CN113012907A (en) * | 2021-02-26 | 2021-06-22 | 西安微电子技术研究所 | Flat-plate transformer of bias-free voltage push-pull circuit |
| CN113012907B (en) * | 2021-02-26 | 2022-06-28 | 西安微电子技术研究所 | Flat-plate transformer of bias-free voltage push-pull circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101388609B (en) | 2010-08-18 |
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