CN101388617B - Double step-down bridge type inverter controlling method for single current sensor - Google Patents
Double step-down bridge type inverter controlling method for single current sensor Download PDFInfo
- Publication number
- CN101388617B CN101388617B CN2008102349632A CN200810234963A CN101388617B CN 101388617 B CN101388617 B CN 101388617B CN 2008102349632 A CN2008102349632 A CN 2008102349632A CN 200810234963 A CN200810234963 A CN 200810234963A CN 101388617 B CN101388617 B CN 101388617B
- Authority
- CN
- China
- Prior art keywords
- signal
- power switch
- control signal
- switch pipe
- door
- 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 14
- 230000001939 inductive effect Effects 0.000 claims description 58
- 239000003990 capacitor Substances 0.000 claims description 15
- 238000005070 sampling Methods 0.000 claims description 5
- 230000002459 sustained effect Effects 0.000 description 22
- 238000010586 diagram Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The invention discloses a method for controlling a single current sensor double-decompression bridge-type inverter, which belongs to methods for controlling inverters. The invention adopts a single current sensor to collect inverter inductor current, and an output voltage outer ring receives an inverter output voltage feedback signal and an output voltage set signal, and outputs a set inductor current. An inductor current inner ring receives the set inductor current and the inductor current feedback signal, and outputs a logic control signal. The power switch tube drives a logic circuit to receive the logic control signal, the inductor current feedback signal and the output voltage feedback signal, and to output high and low level actuating signals of each power switch tube. The method only needs a current sensor, the cost is reduced, simultaneously, the volume and weight of a filter can be reduced through adopting the control method, and the efficiency of the inverter is improved.
Description
Technical field
The present invention relates to a kind of control method of inverter, relate in particular to a kind of double step-down bridge type inverter controlling method for single current sensor.
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, inverter is one of them important component part.Reliability is to weigh an important indicator of inverter performance.Dual buck half bridge inverter owing to there is not the straight-through problem of the brachium pontis power tube of conventional bridge inverter, has improved the reliability of system.But there is the low shortcoming of input direct voltage utilance in it, i.e. brachium pontis output ceiling voltage has only half of input direct voltage.And double step-down bridge type inverter has solved the low problem of dual buck half bridge inverter input DC bus-bar voltage utilance.But if adopt the control method of traditional double decompression semi-bridge converter, need two current sensors, compare, increased cost with the conventional bridge inverter; Whole power frequency period adopts the bipolarity modulation to increase the volume and weight of filter; Half power frequency period HF switch of all power switch pipes, switching loss is higher.
Summary of the invention
The technical problem to be solved in the present invention is that the defective at prior art proposes a kind of double step-down bridge type inverter controlling method for single current sensor.
Double step-down bridge type inverter controlling method for single current sensor of the present invention, described double step-down bridge type inverter is first bridge arm circuit to the, four bridge arm circuit by four bridge arm circuit, power supply, first filter inductance to the, four filter inductances, filter capacitor, load is formed, wherein first bridge arm circuit is made up of first power switch pipe and first fly-wheel diode, second bridge arm circuit is made up of second power switch pipe and second fly-wheel diode, the 3rd bridge arm circuit is made up of the 3rd power switch pipe and the 3rd fly-wheel diode, and the 4th bridge arm circuit is made up of the 4th power switch pipe and the 4th fly-wheel diode; The positive pole of power supply respectively with the drain electrode of first power switch pipe, the negative electrode of second fly-wheel diode, the drain electrode of the 3rd power switch pipe, the negative electrode of the 4th fly-wheel diode connects, the negative electrode of the source electrode of first power switch pipe and first fly-wheel diode connects and composes the intermediate ends of first bridge arm circuit, the drain electrode of the anode of second fly-wheel diode and second power switch pipe connects and composes the intermediate ends of second bridge arm circuit, the negative electrode of the source electrode of the 3rd power switch pipe and the 3rd fly-wheel diode constitutes the intermediate ends of the 3rd bridge arm circuit, the drain electrode of the anode of the 4th fly-wheel diode and the 4th power switch pipe connects and composes the intermediate ends of the 4th bridge arm circuit, the anode of first fly-wheel diode, the source electrode of second power switch pipe, the source electrode of the anode of the 3rd fly-wheel diode and the 4th power switch pipe is connected with the negative pole of power supply respectively; The input of middle termination first filter inductance of first bridge arm circuit, the output of first filter inductance respectively with the output of second filter inductance, the input of filter capacitor, the input of load connects, the input of second filter inductance is connected with the intermediate ends of second bridge arm circuit, the output of filter capacitor respectively with the output of load, the input of the 3rd filter inductance, the input of the 4th filter inductance connects ground connection, the output of the 3rd filter inductance is connected with the intermediate ends of the 3rd bridge arm circuit, and the output of the 4th filter inductance is connected with the intermediate ends of the 4th bridge arm circuit;
Adopt the current sensor sample streams to cross the electric current and the electric current sum outputting inductance current feedback signal that flows through second filter inductance of first filter inductance; Adopt the voltage sampling circuit described inverter output voltage feedback signal of sampling; Described voltage feedback signal and given output voltage are subtracted each other the back export given inductive current by voltage regulator;
When given inductive current greater than 0, voltage feedback signal is greater than 0, then voltage feedback signal is exported second control signal by second comparator, described second control signal is a high level, to export high-frequency modulation signal by the inductive current adjuster behind given inductive current and the inductor current feedback signal subtraction, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, given inductive current is exported first control signal by first comparator, described first control signal is a high level; With described high-frequency modulation signal, second control signal by first or obtain the high level drive signal of first power switch pipe, the first power switch pipe conducting through first with door, first drive circuit successively with first control signal behind the door; Described first control signal is obtained the low level drive signal of second power switch pipe through second with door, second drive circuit successively with described triggering signal after by first inverter, and second power switch pipe turn-offs; With described second control signal by second inverter after with described triggering signal through second or door obtain one tunnel command signal, described first control signal is obtained one tunnel low level command signal after by first inverter, the two-way command signal is obtained the low level drive signal of the 3rd power switch pipe through the 3rd with door, the 3rd drive circuit successively, and the 3rd power switch pipe turn-offs; Described high-frequency modulation signal, first control signal are moved the high-low level drive signal that circuit obtains the 4th power switch pipe through the 4th with door, 4 wheel driven successively, and the 4th power switch pipe is a copped wave pipe high frequency modulated;
When given inductive current greater than 0, voltage feedback signal is less than 0, then voltage feedback signal is exported second control signal by second comparator, described second control signal is a low level, to export high-frequency modulation signal by the inductive current adjuster behind given inductive current and the inductor current feedback signal subtraction, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, given inductive current is exported first control signal by first comparator, described first control signal is a high level; By first or obtain the high-low level drive signal of first power switch pipe through first with door, first drive circuit successively with first control signal behind the door, first power switch pipe is a copped wave pipe high frequency modulated with described high-frequency modulation signal, second control signal; Described first control signal is obtained the low level drive signal of second power switch pipe through second with door, second drive circuit successively with described triggering signal after by first inverter, and second power switch pipe turn-offs; With described second control signal by second inverter after with described triggering signal through second or door obtain one tunnel high-level command signals of the 3rd drive circuit, described first control signal is obtained one tunnel low level command signal of the 3rd drive circuit after by first inverter, the high-low level command signal is obtained the low level drive signal of the 3rd power switch pipe through the 3rd with door, the 3rd drive circuit successively, and the 3rd power switch pipe turn-offs; Described high-frequency modulation signal, first control signal are moved the high-low level drive signal that circuit obtains the 4th power switch pipe through the 4th with door, 4 wheel driven successively, and the 4th power switch pipe is a copped wave pipe high frequency modulated;
When given inductive current less than 0, voltage feedback signal is less than 0, then voltage feedback signal is exported second control signal by second comparator, described second control signal is a low level, to export high-frequency modulation signal by the inductive current adjuster behind given inductive current and the inductor current feedback signal subtraction, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, inductive current is exported first control signal by first comparator, described first control signal is a low level; By first or obtain the low level drive signal of first power switch pipe through first with door, first drive circuit successively with first control signal behind the door, first power switch pipe turn-offs with described high-frequency modulation signal, second control signal; Described first control signal is obtained the high-low level drive signal of second power switch pipe through second with door, second drive circuit successively with described triggering signal after by first inverter, and second power switch pipe is a copped wave pipe high frequency modulated; With described second control signal by second inverter after with described triggering signal through second or door obtain one tunnel high-level command signals of the 3rd drive circuit, described first control signal is obtained another road high-level command signals of the 3rd drive circuit after by first inverter, the two-way high-level command signals is obtained the high level drive signal of the 3rd power switch pipe, the 3rd power switch pipe conducting through the 3rd with door, the 3rd drive circuit successively; Described high-frequency modulation signal, first control signal are moved the low level drive signal that circuit obtains the 4th power switch pipe through the 4th with door, 4 wheel driven successively, and the 4th power switch pipe turn-offs;
When given inductive current less than 0, voltage feedback signal is greater than 0, then voltage feedback signal is exported second control signal by second comparator, described second control signal is a high level, to export high-frequency modulation signal by the inductive current adjuster behind given inductive current and the inductor current feedback signal subtraction, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, inductive current is exported first control signal by first comparator, described first control signal is a low level; By first or obtain the low level drive signal of first power switch pipe through first with door, first drive circuit successively with first control signal behind the door, first power switch pipe turn-offs with described high-frequency modulation signal, second control signal; Described first control signal is obtained the high-low level drive signal of second power switch pipe through second with door, second drive circuit successively with described triggering signal after by first inverter, and second power switch pipe is a copped wave pipe high frequency modulated; With described second control signal by second inverter after with described triggering signal through second or door obtain one tunnel command signal of the 3rd drive circuit, described first control signal is obtained one tunnel high-level command signals of the 3rd drive circuit after by first inverter, the two-way command signal is obtained the high-low level drive signal of the 3rd power switch pipe through the 3rd with door, the 3rd drive circuit successively, and the 3rd power switch pipe is a copped wave pipe high frequency modulated; Described high-frequency modulation signal, first control signal are moved the low level drive signal that circuit obtains the 4th power switch pipe through the 4th with door, 4 wheel driven successively, and the 4th power switch pipe turn-offs.
Double step-down bridge type inverter of the present invention only needs 1 current sensor, has reduced cost; Given when the output voltage same polarity at inductive current, adopt the unipolarity modulation can reduce the volume and weight of filter, simultaneously a power switch pipe normal open and a fly-wheel diode normal off are arranged during this period, there is not switching loss in this device, has improved the efficient of inverter.
Description of drawings
Fig. 1: control system block diagram of the present invention;
Fig. 2: the present invention is the main waveform schematic diagram under the example situation with the inductive load;
Fig. 3: the operating circuit schematic diagram during mode 1 of the present invention;
Fig. 4: the operating circuit schematic diagram during mode 2 of the present invention;
Fig. 5: the operating circuit schematic diagram during mode 3 of the present invention;
Fig. 6: the operating circuit schematic diagram during mode 4 of the present invention;
Fig. 7: the operating circuit schematic diagram during mode 5 of the present invention;
Fig. 8: the operating circuit schematic diagram during mode 6 of the present invention.
Embodiment
As shown in Figure 1.A kind of double step-down bridge type inverter controlling method for single current sensor, described double step-down bridge type inverter is first bridge arm circuit, 1 to the 4th bridge arm circuit 4, power supply U by four bridge arm circuit
In, the first filter inductance L
1To the 4th filter inductance L
4, filter capacitor C
f, load R
LForm, wherein first bridge arm circuit 1 is by first power switch tube S
1With first sustained diode
1Form, second bridge arm circuit 2 is by second power switch tube S
2With second sustained diode
2Form, the 3rd bridge arm circuit 3 is by the 3rd power switch tube S
3With the 3rd sustained diode
3Form, the 4th bridge arm circuit 4 is by the 4th power switch tube S
4With the 4th sustained diode
4Form; Power supply U
InPositive pole respectively with first power switch tube S
1Drain electrode, second sustained diode
2Negative electrode, the 3rd power switch tube S
3Drain electrode, the 4th sustained diode
4Negative electrode connect first power switch tube S
1The source electrode and first sustained diode
1Negative electrode connect and compose the intermediate ends A of first bridge arm circuit 1, second sustained diode
2The anode and second power switch tube S
2Drain electrode connect and compose the intermediate ends B of second bridge arm circuit 2, the 3rd power switch tube S
3Source electrode and the 3rd sustained diode
3Negative electrode constitute the intermediate ends C of the 3rd bridge arm circuit 3, the 4th sustained diode
4Anode and the 4th power switch tube S
4Drain electrode connect and compose the intermediate ends D of the 4th bridge arm circuit 4, first sustained diode
1Anode, second power switch tube S
2Source electrode, the 3rd sustained diode
3Anode and the 4th power switch tube S
4Source electrode respectively with power supply U
InNegative pole connect; The intermediate ends A of first bridge arm circuit 1 meets the first filter inductance L
1Input, the first filter inductance L
1Output respectively with the second filter inductance L
2Output, filter capacitor C
fInput, load R
LInput connect the second filter inductance L
2Input be connected filter capacitor C with the intermediate ends B of second bridge arm circuit 2
fOutput respectively with load R
LOutput, the 3rd filter inductance L
3Input, the 4th filter inductance L
4Input connect ground connection, the 3rd filter inductance L
3Output be connected the 4th filter inductance L with the intermediate ends C of the 3rd bridge arm circuit 3
4Output be connected with the intermediate ends D of the 4th bridge arm circuit 4;
Control method is as follows: adopt the current sensor sample streams to cross the first filter inductance L
1Current i
L1With flow through the second filter inductance L
2Current i
L2Sum i
LOutputting inductance current feedback signal i
LfAdopt the voltage sampling circuit described inverter output voltage u that samples
oOutput voltage feedback signal u
OfWith described voltage feedback signal u
OfWith given output voltage u
RefSubtract each other the back and export given inductive current i by voltage regulator
Ref
As given inductive current i
RefGreater than 0, voltage feedback signal u
OfGreater than 0, then with voltage feedback signal u
OfExport the second control signal u by second comparator
C2, the described second control signal u
C2Be high level, with given inductive current i
RefWith inductor current feedback signal i
LfSubtract each other the back by inductive current adjuster output high-frequency modulation signal, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, given inductive current i
RefExport the first control signal u by first comparator
C1, the described first control signal u
C1Be high level; With described high-frequency modulation signal, the second control signal u
C2By first or behind the door with the first control signal u
C1Obtain first power switch tube S through first with door, first drive circuit successively
1The high level drive signal, first power switch tube S
1Conducting; With the described first control signal u
C1By obtaining second power switch tube S through second with door, second drive circuit successively with described triggering signal behind first inverter
2The low level drive signal, second power switch tube S
2Turn-off; With the described second control signal u
C2By behind second inverter with described triggering signal through second or the door obtain one tunnel command signal, with the described first control signal u
C1By obtaining one tunnel low level command signal behind first inverter, the two-way command signal is obtained the 3rd power switch tube S through the 3rd with door, the 3rd drive circuit successively
3The low level drive signal, the 3rd power switch tube S
3Turn-off; With described high-frequency modulation signal, the first control signal u
C1Obtain the 4th power switch tube S through the 4th with door, the moving circuit of 4 wheel driven successively
4The high-low level drive signal, the 4th power switch tube S
4Be copped wave pipe high frequency modulated;
As given inductive current i
RefGreater than 0, voltage feedback signal u
OfLess than 0, then with voltage feedback signal u
OfExport the second control signal u by second comparator
C2, the described second control signal u
C2Be low level, with given inductive current i
RefWith inductor current feedback signal i
LfSubtract each other the back by inductive current adjuster output high-frequency modulation signal, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, given inductive current i
RefExport the first control signal u by first comparator
C1, the described first control signal u
C1Be high level; With described high-frequency modulation signal, the second control signal u
C2By first or behind the door with the first control signal u
C1Obtain first power switch tube S through first with door, first drive circuit successively
1The high-low level drive signal, first power switch tube S
1Be copped wave pipe high frequency modulated; With the described first control signal u
C1By obtaining second power switch tube S through second with door, second drive circuit successively with described triggering signal behind first inverter
2The low level drive signal, second power switch tube S
2Turn-off; With the described second control signal u
C2By behind second inverter with described triggering signal through second or door obtain one tunnel high-level command signals of the 3rd drive circuit, with the described first control signal u
C1By obtaining one tunnel low level command signal of the 3rd drive circuit behind first inverter, the high-low level command signal is obtained the 3rd power switch tube S through the 3rd with door, the 3rd drive circuit successively
3The low level drive signal, the 3rd power switch tube S
3Turn-off; With described high-frequency modulation signal, the first control signal u
C1Obtain the 4th power switch tube S through the 4th with door, the moving circuit of 4 wheel driven successively
4The high-low level drive signal, the 4th power switch tube S
4Be copped wave pipe high frequency modulated;
As given inductive current i
RefLess than 0, voltage feedback signal u
OfLess than 0, then with voltage feedback signal u
OfExport the second control signal u by second comparator
C2, the described second control signal u
C2Be low level, with given inductive current i
RefWith inductor current feedback signal i
LfSubtract each other the back by inductive current adjuster output high-frequency modulation signal, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, inductive current i
RefExport the first control signal u by first comparator
C1, the described first control signal u
C1Be low level; With described high-frequency modulation signal, the second control signal u
C2By first or behind the door with the first control signal u
C1Obtain first power switch tube S through first with door, first drive circuit successively
1The low level drive signal, first power switch tube S
1Turn-off; With the described first control signal u
C1By obtaining second power switch tube S through second with door, second drive circuit successively with described triggering signal behind first inverter
2The high-low level drive signal, second power switch tube S
2Be copped wave pipe high frequency modulated; With the described second control signal u
C2By behind second inverter with described triggering signal through second or door obtain one tunnel high-level command signals of the 3rd drive circuit, with the described first control signal u
C1By obtaining another road high-level command signals of the 3rd drive circuit behind first inverter, the two-way high-level command signals is obtained the 3rd power switch tube S through the 3rd with door, the 3rd drive circuit successively
3The high level drive signal, the 3rd power switch tube S
3Conducting; With described high-frequency modulation signal, the first control signal u
C1Obtain the 4th power switch tube S through the 4th with door, the moving circuit of 4 wheel driven successively
4The low level drive signal, the 4th power switch tube S
4Turn-off;
As given inductive current i
RefLess than 0, voltage feedback signal u
OfGreater than 0, then with voltage feedback signal u
OfExport the second control signal u by second comparator
C2, the described second control signal u
C2Be high level, with given inductive current i
RefWith inductor current feedback signal i
LfSubtract each other the back by inductive current adjuster output high-frequency modulation signal, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, inductive current i
RefExport the first control signal u by first comparator
C1, the described first control signal u
C1Be low level; With described high-frequency modulation signal, the second control signal u
C2By first or behind the door with the first control signal u
C1Obtain first power switch tube S through first with door, first drive circuit successively
1The low level drive signal, first power switch tube S
1Turn-off; With the described first control signal u
C1By obtaining second power switch tube S through second with door, second drive circuit successively with described triggering signal behind first inverter
2The high-low level drive signal, second power switch tube S
2Be copped wave pipe high frequency modulated; With the described second control signal u
C2By behind second inverter with described triggering signal through second or door obtain one tunnel command signal of the 3rd drive circuit, with the described first control signal u
C1By obtaining one tunnel high-level command signals of the 3rd drive circuit behind first inverter, the two-way command signal is obtained the 3rd power switch tube S through the 3rd with door, the 3rd drive circuit successively
3The high-low level drive signal, the 3rd power switch tube S
3Be copped wave pipe high frequency modulated; With described high-frequency modulation signal, the first control signal u
C1Obtain the 4th power switch tube S through the 4th with door, the moving circuit of 4 wheel driven successively
4The low level drive signal, the 4th power switch tube S
4Turn-off.
Fig. 2 is that the single current sensor double step-down bridge type inverter is the main waveform schematic diagram under the example situation with the inductive load.Adopt the current i of current sensor sampling
LFor flowing through the first filter inductance L
1Current i
L1With flow through the second filter inductance L
2Current i
L2Sum is as voltage feedback signal u
OfWith given inductive current i
RefPolarity all is timing, second power switch tube S
2With the 3rd power switch tube S
3Turn-off first power switch tube S
1Normal open, the 4th power switch tube S
4Be copped wave pipe high frequency modulated, the intermediate ends D point-to-point transmission voltage U of the intermediate ends A of first bridge arm circuit 1 and the 4th bridge arm circuit 4
ADBe the unipolarity waveform; As voltage feedback signal u
OfPolarity is for bearing given inductive current i
RefPolarity is timing, second power switch tube S
2With the 3rd power switch tube S
3Turn-off first power switch tube S
1With the 4th power switch tube S
4The while switch, and be copped wave pipe high frequency modulated, the intermediate ends D point-to-point transmission voltage U of the intermediate ends A of first bridge arm circuit 1 and the 4th bridge arm circuit 4
ADBe the bipolarity waveform; As voltage feedback signal u
OfWith given inductive current i
RefWhen polarity all is negative, first power switch tube S
1With the 4th power switch tube S
4Turn-off the 3rd power switch tube S
3Normal open, second power switch tube S
2Be copped wave pipe high frequency modulated, the intermediate ends C point-to-point transmission voltage U of the intermediate ends B of second bridge arm circuit 2 and the 3rd bridge arm circuit 3
BCBe the unipolarity waveform; As voltage feedback signal u
OfFor just, given inductive current i
RefWhen polarity is negative, first power switch tube S
1With the 4th power switch tube S
4Turn-off second power switch tube S
2With the 3rd power switch tube S
3The while switch, and be copped wave pipe high frequency modulated, the intermediate ends C point-to-point transmission voltage U of the intermediate ends B of second bridge arm circuit 2 and the 3rd bridge arm circuit 3
BCBe the bipolarity waveform.
In conjunction with Fig. 3～8 narrations concrete operation principle of the present invention, below the working condition of each switch mode is made a concrete analysis of.Wherein U is power supply U
InVoltage.
As shown in Figure 3, switch mode 1
Second, third power switch tube S
2And S
3Turn-off the first, the 4th power switch tube S
1And S
4Conducting, electric current is by power supply U
InAnodal by first power switch tube S
1, the first filter inductance L
1, load R
LWith filter capacitor C
fParallel branch, the 4th filter inductance L
4, the 4th power switch tube S
4Get back to power supply U
InNegative pole flows through the first, the 4th filter inductance L
1And L
4Electric current rise U simultaneously
AD=U.
As shown in Figure 4, switch mode 2
Second, third power switch tube S
2And S
3Turn-off first power switch tube S
1Conducting, the 4th power switch tube S
4Turn-off the 4th sustained diode
4Afterflow, electric current is by first power switch tube S
1Source electrode by the first filter inductance L
1, load R
LWith filter capacitor C
fParallel branch, the 4th filter inductance L
4, the 4th sustained diode
4Get back to first power switch tube S
1Drain electrode, flow through the first, the 4th filter inductance L
1And L
4Electric current descend U simultaneously
AD=0.
As shown in Figure 5, switch mode 3
Second, third power switch tube S
2And S
3Turn-off the first, the 4th power switch tube S
1And S
4Turn-off the first, the 4th sustained diode simultaneously
1And D
4Afterflow, electric current is by power supply U
InNegative pole is by first sustained diode
1, the first filter inductance L
1, load R
LWith filter capacitor C
fParallel branch, the 4th filter inductance L
4, the 4th sustained diode
4Get back to power supply U
InPositive pole flows through the first, the 4th filter inductance L
1And L
4Electric current descend U simultaneously
AD=-U.
As shown in Figure 6, switch mode 4
The first, the 4th power switch tube S
1And S
4Turn-off second, third power switch tube S
2And S
3Conducting, electric current is by power supply U
InAnodal by the 3rd power switch tube S
3, the 3rd filter inductance L
3, load R
LWith filter capacitor C
fParallel branch, the second filter inductance L
2, second power switch tube S
2Get back to power supply U
InNegative pole flows through second, third filter inductance L
2And L
3Electric current simultaneously negative sense increase U
BC=-U.
As shown in Figure 7, switch mode 5
The first, the 4th power switch tube S
1And S
4Turn-off the 3rd power switch tube S
3Conducting, second power switch tube S
2Turn-off second sustained diode
2Afterflow, electric current is by the 3rd power switch tube S
3Source electrode by the 3rd filter inductance L
3, load R
LWith filter capacitor C
fParallel branch, the second filter inductance L
2, second sustained diode
2Get back to the 3rd power switch tube S
3Drain electrode, flow through second, third filter inductance L
2And L
3Electric current simultaneously negative sense reduce U
BC=0.
As shown in Figure 8, switch mode 6
The first, the 4th power switch tube S
1And S
4Turn-off second, third power switch tube S
2And S
3Turn-off second, third sustained diode simultaneously
2And D
3Afterflow, electric current is by power supply U
InNegative pole is by the 3rd sustained diode
3, the 3rd filter inductance L
3, load R
LWith filter capacitor C
fParallel branch, the second filter inductance L
2, second sustained diode
2Get back to power supply U
InPositive pole flows through second, third filter inductance L
2And L
3Electric current simultaneously negative sense reduce U
BC=U.
Claims (1)
1. double step-down bridge type inverter controlling method for single current sensor, described double step-down bridge type inverter by four bridge arm circuit promptly first bridge arm circuit (1) to the 4th bridge arm circuit (4), power supply (U
In), the first filter inductance (L
1) to the 4th filter inductance (L
4), filter capacitor (C
f), load (R
L) form, wherein first bridge arm circuit (1) is by the first power switch pipe (S
1) and the first fly-wheel diode (D
1) form, second bridge arm circuit (2) is by the second power switch pipe (S
2) and the second fly-wheel diode (D
2) form, the 3rd bridge arm circuit (3) is by the 3rd power switch pipe (S
3) and the 3rd fly-wheel diode (D
3) form, the 4th bridge arm circuit (4) is by the 4th power switch pipe (S
4) and the 4th fly-wheel diode (D
4) form; Power supply (U
In) positive pole respectively with the first power switch pipe (S
1) drain electrode, the second fly-wheel diode (D
2) negative electrode, the 3rd power switch pipe (S
3) drain electrode, the 4th fly-wheel diode (D
4) negative electrode connect the first power switch pipe (S
1) the source electrode and the first fly-wheel diode (D
1) negative electrode connect and compose the intermediate ends (A) of first bridge arm circuit (1), the second fly-wheel diode (D
2) the anode and the second power switch pipe (S
2) drain electrode connect and compose the intermediate ends (B) of second bridge arm circuit (2), the 3rd power switch pipe (S
3) source electrode and the 3rd fly-wheel diode (D
3) negative electrode constitute the intermediate ends (C) of the 3rd bridge arm circuit (3), the 4th fly-wheel diode (D
4) anode and the 4th power switch pipe (S
4) drain electrode connect and compose the intermediate ends (D) of the 4th bridge arm circuit (4), the first fly-wheel diode (D
1) anode, the second power switch pipe (S
2) source electrode, the 3rd fly-wheel diode (D
3) anode and the 4th power switch pipe (S
4) source electrode respectively with power supply (U
In) negative pole connect; The intermediate ends (A) of first bridge arm circuit (1) meets the first filter inductance (L
1) input, the first filter inductance (L
1) output respectively with the second filter inductance (L
2) output, filter capacitor (C
f) input, load (R
L) input connect the second filter inductance (L
2) input be connected filter capacitor (C with the intermediate ends (B) of second bridge arm circuit (2)
f) output respectively with load (R
L) output, the 3rd filter inductance (L
3) input, the 4th filter inductance (L
4) input connect ground connection, the 3rd filter inductance (L
3) output be connected the 4th filter inductance (L with the intermediate ends (C) of the 3rd bridge arm circuit (3)
4) output be connected with the intermediate ends (D) of the 4th bridge arm circuit (4);
It is characterized in that: adopt the current sensor sample streams to cross the first filter inductance (L
1) electric current (i
L1) and flow through the second filter inductance (L
2) electric current (i
L2) sum (i
L) outputting inductance current feedback signal (i
Lf); Adopt the voltage sampling circuit described inverter output voltage (u that samples
o) output voltage feedback signal (u
Of); With given output voltage (u
Ref) deduct described voltage feedback signal (u
Of) then export given inductive current (i by voltage regulator
Ref);
As given inductive current (i
Ref) greater than 0, voltage feedback signal (u
Of) greater than 0, then with voltage feedback signal (u
Of) with zero potential by the second comparator back output second control signal (u that compares
C2), the described second control signal (u
C2) be high level, with given inductive current (i
Ref) deduct inductor current feedback signal (i
Lf) back by inductive current adjuster output high-frequency modulation signal, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, with given inductive current (i
Ref) with zero potential by the first comparator back output first control signal (u that compares
C1), the described first control signal (u
C1) be high level; With described high-frequency modulation signal, the second control signal (u
C2) by first or behind the door with the first control signal (u
C1) obtain the first power switch pipe (S through first with door, first drive circuit successively
1) the high level drive signal, the first power switch pipe (S
1) conducting; With the described first control signal (u
C1) by obtaining the second power switch pipe (S through second with door, second drive circuit successively with described triggering signal behind first inverter
2) the low level drive signal, the second power switch pipe (S
2) turn-off; With the described second control signal (u
C2) by behind second inverter with described triggering signal through second or the door obtain one tunnel command signal, with the described first control signal (u
C1) by obtaining one tunnel low level command signal behind first inverter, the two-way command signal is obtained the 3rd power switch pipe (S through the 3rd with door, the 3rd drive circuit successively
3) the low level drive signal, the 3rd power switch pipe (S
3) turn-off; With described high-frequency modulation signal, the first control signal (u
C1) obtain the 4th power switch pipe (S through the 4th with door, the moving circuit of 4 wheel driven successively
4) the high-low level drive signal, the 4th power switch pipe (S
4) be copped wave pipe high frequency modulated;
As given inductive current (i
Ref) greater than 0, voltage feedback signal (u
Of) less than 0, then with voltage feedback signal (u
Of) with zero potential by the second comparator back output second control signal (u that compares
C2), the described second control signal (u
C2) be low level, with given inductive current (i
Ref) deduct inductor current feedback signal (i
Lf) back by inductive current adjuster output high-frequency modulation signal, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, with given inductive current (i
Ref) with zero potential by the first comparator back output first control signal (u that compares
C1), the described first control signal (u
C1) be high level; With described high-frequency modulation signal, the second control signal (u
C2) by first or behind the door with the first control signal (u
C1) obtain the first power switch pipe (S through first with door, first drive circuit successively
1) the high-low level drive signal, the first power switch pipe (S
1) be copped wave pipe high frequency modulated; With the described first control signal (u
C1) by obtaining the second power switch pipe (S through second with door, second drive circuit successively with described triggering signal behind first inverter
2) the low level drive signal, the second power switch pipe (S
2) turn-off; With the described second control signal (u
C2) by behind second inverter with described triggering signal through second or door obtain one tunnel high-level command signals of the 3rd drive circuit, with the described first control signal (u
C1) by obtaining one tunnel low level command signal of the 3rd drive circuit behind first inverter, the high-low level command signal is obtained the 3rd power switch pipe (S through the 3rd with door, the 3rd drive circuit successively
3) the low level drive signal, the 3rd power switch pipe (S
3) turn-off; With described high-frequency modulation signal, the first control signal (u
C1) obtain the 4th power switch pipe (S through the 4th with door, the moving circuit of 4 wheel driven successively
4) the high-low level drive signal, the 4th power switch pipe (S
4) be copped wave pipe high frequency modulated;
As given inductive current (i
Ref) less than 0, voltage feedback signal (u
Of) less than 0, then with voltage feedback signal (u
Of) with zero potential by the second comparator back output second control signal (u that compares
C2), the described second control signal (u
C2) be low level, with given inductive current (i
Ref) deduct inductor current feedback signal (i
Lf) back by inductive current adjuster output high-frequency modulation signal, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, with inductive current (i
Ref) with zero potential by the first comparator back output first control signal (u that compares
C1), the described first control signal (u
C1) be low level; With described high-frequency modulation signal, the second control signal (u
C2) by first or behind the door with the first control signal (u
C1) obtain the first power switch pipe (S through first with door, first drive circuit successively
1) the low level drive signal, the first power switch pipe (S
1) turn-off; With the described first control signal (u
C1) by obtaining the second power switch pipe (S through second with door, second drive circuit successively with described triggering signal behind first inverter
2) the high-low level drive signal, the second power switch pipe (S
2) be copped wave pipe high frequency modulated; With the described second control signal (u
C2) by behind second inverter with described triggering signal through second or door obtain one tunnel high-level command signals of the 3rd drive circuit, with the described first control signal (u
C1) by obtaining another road high-level command signals of the 3rd drive circuit behind first inverter, the two-way high-level command signals is obtained the 3rd power switch pipe (S through the 3rd with door, the 3rd drive circuit successively
3) the high level drive signal, the 3rd power switch pipe (S
3) conducting; With described high-frequency modulation signal, the first control signal (u
C1) obtain the 4th power switch pipe (S through the 4th with door, the moving circuit of 4 wheel driven successively
4) the low level drive signal, the 4th power switch pipe (S
4) turn-off;
As given inductive current (i
Ref) less than 0, voltage feedback signal (u
Of) greater than 0, then with voltage feedback signal (u
Of) with zero potential by the second comparator back output second control signal (u that compares
C2), the described second control signal (u
C2) be high level, with given inductive current (i
Ref) deduct inductor current feedback signal (i
Lf) back by inductive current adjuster output high-frequency modulation signal, high-frequency modulation signal is obtained triggering signal through the 3rd inverter, with inductive current (i
Ref) with zero potential by the first comparator back output first control signal (u that compares
C1), the described first control signal (u
C1) be low level; With described high-frequency modulation signal, the second control signal (u
C2) by first or behind the door with the first control signal (u
C1) obtain the first power switch pipe (S through first with door, first drive circuit successively
1) the low level drive signal, the first power switch pipe (S
1) turn-off; With the described first control signal (u
C1) by obtaining the second power switch pipe (S through second with door, second drive circuit successively with described triggering signal behind first inverter
2) the high-low level drive signal, the second power switch pipe (S
2) be copped wave pipe high frequency modulated; With the described second control signal (u
C2) by behind second inverter with described triggering signal through second or door obtain one tunnel command signal of the 3rd drive circuit, with the described first control signal (u
C1) by obtaining one tunnel high-level command signals of the 3rd drive circuit behind first inverter, the two-way command signal is obtained the 3rd power switch pipe (S through the 3rd with door, the 3rd drive circuit successively
3) the high-low level drive signal, the 3rd power switch pipe (S
3) be copped wave pipe high frequency modulated; With described high-frequency modulation signal, the first control signal (u
C1) obtain the 4th power switch pipe (S through the 4th with door, the moving circuit of 4 wheel driven successively
4) the low level drive signal, the 4th power switch pipe (S
4) turn-off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102349632A CN101388617B (en) | 2008-11-05 | 2008-11-05 | Double step-down bridge type inverter controlling method for single current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102349632A CN101388617B (en) | 2008-11-05 | 2008-11-05 | Double step-down bridge type inverter controlling method for single current sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101388617A CN101388617A (en) | 2009-03-18 |
| CN101388617B true CN101388617B (en) | 2010-08-18 |
Family
ID=40477848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102349632A Expired - Fee Related CN101388617B (en) | 2008-11-05 | 2008-11-05 | Double step-down bridge type inverter controlling method for single current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101388617B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8958219B2 (en) | 2011-09-15 | 2015-02-17 | Fsp Technology Inc. | Non-isolated inverter and related control manner thereof and application using the same |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938127B (en) * | 2010-08-17 | 2012-11-21 | 南京航空航天大学 | Single-phase and three-phase dual buck full-bridge parallel active power filter |
| CN101938126B (en) * | 2010-08-17 | 2012-11-21 | 南京航空航天大学 | Dual-buck half-bridge parallel active power filter based on hysteresis control |
| CN101951185B (en) * | 2010-11-04 | 2012-10-31 | 盐城工学院 | Method for controlling dual buck grid-connected inverter |
| CN102223101A (en) * | 2011-06-21 | 2011-10-19 | 盐城工学院 | Control method for dual-bucking full-bridge grid-connected inverter |
| CN103475245B (en) * | 2013-09-06 | 2015-11-18 | 南京航空航天大学 | The Zero-crossing Distortion suppressing method of double step-down combining inverter |
| CN104578852B (en) * | 2013-10-11 | 2017-05-10 | 台达电子工业股份有限公司 | Solar photocell source converting system and operation method thereof |
| CN104811070B (en) * | 2014-01-29 | 2017-08-04 | 台达电子工业股份有限公司 | Power conversion system and its operating method |
| CN104038094B (en) * | 2014-04-01 | 2017-01-18 | 燕山大学 | Control method of non-isolated three-phase photovoltaic grid-connected inverter |
| EP3089347B1 (en) * | 2015-04-27 | 2018-06-27 | ABB Schweiz AG | A method for acquiring values indicative of an ac current of an inverter and related circuit and inverter |
| CN107147322B (en) * | 2017-06-26 | 2023-04-07 | 福州大学 | Iterative learning control method for double-Buck full-bridge inverter |
| CN107425744B (en) * | 2017-07-10 | 2019-07-12 | 南京航空航天大学 | The output waveform of inverter improves and the control method of low-loss short circuit operation |
| CN109905050B (en) * | 2019-02-13 | 2021-07-09 | 苏州达方电子有限公司 | Power conversion system and operation method thereof |
| CN116191918B (en) * | 2022-12-14 | 2023-10-27 | 惠州市乐亿通科技有限公司 | Modulation method of non-staggered parallel soft switch split-phase inverter circuit and split-phase inverter |
-
2008
- 2008-11-05 CN CN2008102349632A patent/CN101388617B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8958219B2 (en) | 2011-09-15 | 2015-02-17 | Fsp Technology Inc. | Non-isolated inverter and related control manner thereof and application using the same |
| TWI482415B (en) * | 2011-09-15 | 2015-04-21 | Fsp Technology Inc | Non-isolated inverter and related control manner thereof and photovoltaic grid-connected system using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101388617A (en) | 2009-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101388617B (en) | Double step-down bridge type inverter controlling method for single current sensor | |
| CN102005962B (en) | Buck-boost grid-connected inverter and control method thereof | |
| CN100533938C (en) | Six-bridge arm five-path output electromagnetic bearing switch power amplifier control method | |
| CN101951185B (en) | Method for controlling dual buck grid-connected inverter | |
| CN106452280A (en) | Interleaving Buck converter for control of high-speed motor | |
| CN103219912B (en) | Control method suitable for universal input voltage buck-boost grid-connected inverter | |
| CN102223101A (en) | Control method for dual-bucking full-bridge grid-connected inverter | |
| CN109149922B (en) | Power factor correction circuit and alternating current charger for electric automobile using same | |
| CN101388616A (en) | Double step-down combining inverter | |
| CN105281361B (en) | A kind of five-level double step-down combining inverter | |
| CN102969898B (en) | Low-voltage wide-input three-level full-bridge converter and control method thereof | |
| CN106100333A (en) | High-power soft switch two-way DC DC converter circuit | |
| CN107153137A (en) | The monitoring device and method of DCM booster converters inductance and output capacitance | |
| CN104467406A (en) | Led constant current driver | |
| CN104767379A (en) | Buck direct-current converter | |
| CN103337973B (en) | A kind of BOOST-BUCK-BOOST is without bridging parallel operation | |
| CN103312153B (en) | A kind of parallel multi input coupling inductance buck-boost converter | |
| CN102882398B (en) | DC-AC converter | |
| CN101783582B (en) | Single-input dual-output pulse-width modulation signal generating circuit with adjustable dead time | |
| CN205377786U (en) | Two pressure reducing type photovoltaic power generation system | |
| CN103997053B (en) | Energy in bidirectional flow EPS | |
| CN103532379A (en) | Bidirectional DC-DC converter and hybrid electric vehicle | |
| CN100459404C (en) | Power amplifier of magnetic bearing switch possessing multiple routes of output, and control method | |
| CN106787900A (en) | Boosting combining inverter and its control method | |
| CN104022672A (en) | Self-adaptive adjustable delay circuit for soft-switch ZVT (zero voltage transformation) 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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20090318 Assignee: Yangzhou Shuanghong Electronics Co., Ltd. Assignor: Nanjing University of Aeronautics and Astronautics Contract record no.: 2013320000081 Denomination of invention: Double step-down bridge type inverter controlling method for single current sensor Granted publication date: 20100818 License type: Exclusive License Record date: 20130314 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100818 Termination date: 20151105 |
|
| EXPY | Termination of patent right or utility model |