CN106655738A - Electrolytic capacitor-free quasi single stage inverter and control method therefor - Google Patents
Electrolytic capacitor-free quasi single stage inverter and control method therefor Download PDFInfo
- Publication number
- CN106655738A CN106655738A CN201510740317.3A CN201510740317A CN106655738A CN 106655738 A CN106655738 A CN 106655738A CN 201510740317 A CN201510740317 A CN 201510740317A CN 106655738 A CN106655738 A CN 106655738A
- Authority
- CN
- China
- Prior art keywords
- auxiliary
- signal
- circuit
- switch
- capacitor
- 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.)
- Granted
Links
Abstract
The invention discloses an electrolytic capacitor-free quasi single stage inverter and a control method therefor. A main circuit topology of the quasi single stage inverter comprises a direct current power source, an input filtering capacitor, a main switch tube, an isolation voltage transformer, a rectification circuit, a filter circuit, a polarity reversal inversion bridge, a load and an active auxiliary circuit, wherein the control method comprises the following steps: a low frequency component is extracted from auxiliary inductive current sampling value via a low pass filter; a subtracter and a P controller are used for obtaining auxiliary inductive current modulated waves, the auxiliary inductive current modulated waves go through a comparator and a drive circuit, an auxiliary inductive current is controlled and reference value thereof is tracked; three modulated waves are obtained after auxiliary capacitor voltage sampling value and load voltage sampling value are processed via a modulated wave calculating module; the three modulated waves go through the comparator, a logic circuit, a frequency division circuit and the drive circuit; the inverter can be controlled to work according to requirements. Via the quasi single stage inverter and the control method therefor, power ripple waves brought by an alternating current load are introduced into an active auxiliary circuit, and therefore no large electrolytic capacitor is needed in the circuit for filtering low frequency power ripple waves.
Description
Technical field
The present invention relates to the quasi-single-stage inverter and its control method of a kind of no electrolytic capacitor, belong to new forms of energy power converter stricture of vagina
Ripple suppression technology field.
Background technology
In recent years, the mankind increasingly pay attention to natural environment, cleaning, efficient, the new forms of energy power technology of sustainable development
Attract wide attention, occurred in that some inverter topologies and control program with regard to generation of electricity by new energy.It is inverse for this
Become device, the two frequency multiplication power pulsations contained in output AC power will necessarily feedback transmission to direct current input side, so as to affect
The service life of the input sources such as accumulator, fuel cell, can disturb the stability of DC power system, therefore solve when serious
The certainly power ripple problem in grid-connected power generation system, the utilization ratio for improving new forms of energy are very urgent.Although this low
Frequency ripple can be filtered with big electrochemical capacitor, but under high temperature operating conditions, electrochemical capacitor long-time frequently discharge and recharge
Its service life can be caused to decline, it is contemplated that to the service life and power density of inverter, not recommending electrolysis electricity
Hold.LC resonance circuits are accessed in circuit, by resonant circuit frequency is designed as twice output frequency, it is also possible to filter
Twice power ripple, but required inductance and electric capacity volume reduce the reliability and power density of system all than larger.
Sum it up, these conventional dependence passive devices are come the method that filters power ripple, often all exist volume it is big, into
The problems such as this is high.For this purpose, some scholars are also exploring other methods, power ripple not only can be filtered, it is also possible to reduce
Capacitance is so as to using other more long-life electric capacity, such as thin-film capacitor etc..
The content of the invention
Present invention aims to the technological deficiency existing for above-mentioned inverter provides a kind of quasi-single-stage of no electrolytic capacitor
Inverter and its control method, can not only realize direct current input side without low frequency using this quasi-single-stage inverter and control method
Power ripple, while can casting out, this reliability of electrochemical capacitor is low, short life bulky capacitor.
The present invention for achieving the above object, is adopted the following technical scheme that：
A kind of quasi-single-stage inverter of no electrolytic capacitor of the present invention, including DC source, input filter capacitor, master switch
Pipe, isolating transformer, rectification circuit, filter circuit, polarity inversion inverter bridge and load, wherein main switch include two
Individual switching tube, isolating transformer include three windings, and the positive pole of DC source connects one end of input filter capacitor, unidirectional current
The emitter stage phase of the negative pole in source, the other end of input filter capacitor, the emitter stage of the first main switch and the second main switch
Connection, the different name of the first winding terminate the colelctor electrode of the first main switch, second winding of termination of the same name of the first winding it is different
Name end, the colelctor electrode of second main switch of termination of the same name of the second winding, rectification circuit include four diodes, and first is whole
The anode of stream diode, the negative electrode of the second commutation diode are connected with the Same Name of Ends of the tertiary winding, the 3rd commutation diode
Anode, the negative electrode of the 4th commutation diode be connected with the different name end of the tertiary winding, the first commutation diode and the 3rd whole
The negative electrode of stream diode connects and composes the sun of the positive output end of rectification circuit, the second commutation diode and the 4th commutation diode
Pole connects and composes the negative output terminal of rectification circuit, and polarity inversion inverter bridge includes four switching tubes, a termination of filter inductance
The positive output end of rectification circuit, the other end of filter inductance, one end of filter capacitor, the colelctor electrode of first switch pipe and
The colelctor electrode of three switching tubes is connected, the other end of filter capacitor, the negative output terminal of rectification circuit, second switch pipe send out
The emitter stage of emitter-base bandgap grading and the 4th switching tube is connected, and the emitter stage of first switch pipe is connected with the colelctor electrode of second switch pipe structure
The positive output end of poling sex reversal inverter bridge, the colelctor electrode of the emitter stage and the 4th switching tube of the 3rd switching tube are connected and constitute pole
The negative output terminal of sex reversal inverter bridge, one end of the positive output terminating load of polarity inversion inverter bridge, polarity inversion inverter bridge
Negative output terminating load the other end, it is characterised in that：
Also include active auxiliary circuit；Wherein active auxiliary circuit includes auxiliary induction, auxiliary capacitor, two two poles of auxiliary
Pipe and two auxiliary switches, the anode of the first booster diode connect the positive pole of DC source, the moon of the first booster diode
The colelctor electrode of pole, the anode of auxiliary capacitor and the second auxiliary switch is connected, the negative terminal of auxiliary capacitor, the second auxiliary two
The emitter stage of the anode of pole pipe and the first auxiliary switch is connected, the colelctor electrode of the first auxiliary switch, auxiliary induction
One end is connected with the negative pole of DC source, the other end of auxiliary induction, the negative electrode of the second booster diode and the second auxiliary
The emitter stage of switching tube is connected.
A kind of quasi-single-stage inverter of described no electrolytic capacitor, it is characterised in that the controlling party of the quasi-single-stage inverter
Method is comprised the following steps：
Step A, detects auxiliary induction current signal, auxiliary capacitor voltage signal, load voltage signal；
Step B, the auxiliary induction current signal that step A is obtained obtain its low frequency component through low pass filter；
Step C, calculates the difference of auxiliary induction current reference signal and auxiliary induction electric current low frequency component；
Step D, the auxiliary capacitor voltage signal that step A is obtained obtain its DC component through low pass filter；
Step E, calculates the difference of auxiliary capacitor voltage reference signal and auxiliary capacitor voltage DC component, by the electricity for obtaining
Pressure difference is adjusted with PI controllers, obtains auxiliary capacitor voltage disturbance signal；
Step F, the current differential that step C is obtained is adjusted with P controller, and be subsequently adding that step E obtains is auxiliary
Capacitance voltage disturbing signal is helped, the modulation wave signal of quasi-single-stage inverter auxiliary induction electric current is obtained；
Step G, the modulation wave signal input comparator of aforementioned auxiliary induction electric current is compared with sawtooth carrier wave, obtains second
The pwm control signal of auxiliary switch；
Step H, the auxiliary capacitor voltage signal that step A is obtained, load voltage signal are input into modulating wave respectively and calculate mould
Block, obtains first, second, third modulation wave signal；
Step I, by aforementioned first, second, third modulation wave signal, input comparator is compared with sawtooth carrier wave respectively, is obtained
First, second, third logical signal；
Step J, the load voltage signal input zero-crossing comparator that step A is obtained, obtains the 4th logical signal；
Step K, by aforementioned first, second logical signal and determinating mode 1, the signal difference input logic circuit of pattern 2,
The signal of the first logical signal and determinating mode 1 accesses logical AND gate, the second logical signal and judges mould in logic circuits
After the signal of formula 2 accesses logical AND gate, then access the pwm control signal that logic sum gate obtains main switch；
Aforementioned second, third logical signal is distinguished into input logic circuit, the 3rd logical signal is first passed through in logic circuits
After logic inverter, and after the second logical signal accesses logical AND gate together, then logical AND is accessed with the signal of determinating mode 2
Door obtains the pwm control signal of the first auxiliary switch；
By aforementioned 4th logical signal input logic circuit, logic inverter is first passed through in logic circuits and obtains second, third
After the pwm control signal of switching tube, then the pwm control signal that the first, the 4th switching tube is obtained through logic inverter；
Step L, the pwm control signal input frequency dividing circuit of the main switch that step K is obtained, obtains first respectively
The pwm control signal of the pwm control signal of master switch and the second master switch；
Step M, the second auxiliary switch pwm control signal that respectively step G is obtained, step K obtain first
The pwm control signal of the pwm control signal and first, second, third and fourth switching tube of auxiliary switch,
The pwm control signal of the first master switch that step L is obtained, the pwm control signal input of the second master switch drive electricity
Rood is to two main switches, the drive signal of four switching tubes of two auxiliary switches and polarity inversion inverter bridge, control
Quasi-single-stage inverter.
Technical characteristics of the present invention compared with original technology are, due to increased active auxiliary circuit, by exchange
The power ripple that load brings introduces active auxiliary circuit, and DC power supply terminal need not in there was only dc power, therefore circuit
Big electrochemical capacitor is filtering low frequency power ripple.
Description of the drawings
Accompanying drawing 1 is a kind of quasi-single-stage converter main circuit of no electrolytic capacitor of the present invention and its structural representation of control method
Figure.
Accompanying drawing 2 is a kind of quasi-single-stage inverter input-output power relation schematic diagram of no electrolytic capacitor of the present invention.
3～Figure 10 of accompanying drawing is a kind of each switch mode schematic diagram of the quasi-single-stage inverter of no electrolytic capacitor of the present invention.
Accompanying drawing 11 is that the present invention is applied to input current under load voltage 110V/50Hz occasions, auxiliary capacitor voltage, filtering
The simulation waveform of inductive current and load voltage.
Primary symbols title in above-mentioned accompanying drawing：Vin, supply voltage.Sm1、Sm2、Sx1、Sx2、S1～S4, power switch
Pipe.Dx1、Dx2, booster diode.Cin, input filter capacitor.Cx, auxiliary capacitor.Lx, auxiliary induction.Tr, every
From transformator.N1、N2、N3, isolating transformer winding.D1～D4, commutation diode.Lf, filter inductance.Cf, filter
Ripple electric capacity.RL, load.vx, auxiliary capacitor voltage.vo, load voltage.
Specific embodiment
Technical scheme to inventing is described in detail below in conjunction with the accompanying drawings：
Shown in accompanying drawing 1 is a kind of quasi-single-stage converter main circuit and its structural representation of control method of no electrolytic capacitor
Figure.The quasi-single-stage converter main circuit of no electrolytic capacitor is by DC source, input filter capacitor 1, main switch 2, isolation
Transformator 3, rectification circuit 4, filter circuit 5, polarity inversion inverter bridge 6, load 7 and auxiliary circuit 8 are constituted.Sm1、
Sm2、Sx1、Sx2It is four power switch pipes, LxIt is auxiliary induction, CxIt is auxiliary capacitor, Dx1、Dx2It is two poles of auxiliary
Pipe, TrIt is isolating transformer, D1～D4It is commutation diode, LfIt is filter inductance, CfIt is filter capacitor, S1～S4It is inverse
Become switching tube, RLFor load.vx, auxiliary capacitor voltage.vo, load voltage.
Detection auxiliary induction current signal iLx, auxiliary capacitor voltage signal vx, load voltage signal vo；By auxiliary induction electricity
Stream signal iLxThrough low pass filter, its low frequency component is obtained；Calculate auxiliary induction current reference signal iLx *With auxiliary electricity
Difference DELTA i of inducing current low frequency componentLx；By auxiliary capacitor voltage signal vxThrough low pass filter, its DC component is obtained
Vx；Calculate auxiliary capacitor voltage reference signal vx *With auxiliary capacitor voltage DC component VxDifference DELTA vx, by the electricity for obtaining
Pressure difference Δ vxIt is adjusted with PI controllers, obtains auxiliary capacitor voltage disturbance signal；By current differential Δ iLxControlled with P
Device processed is adjusted, and is subsequently adding auxiliary capacitor voltage disturbance signal, obtains the tune of quasi-single-stage inverter auxiliary induction electric current
Ripple signal M processed0；By the modulation wave signal M of auxiliary induction electric current0Input comparator is compared with sawtooth carrier wave, obtains second
The pwm control signal Q of auxiliary switchx2；By auxiliary capacitor voltage signal vx, load voltage signal voInput respectively is adjusted
Ripple computing module processed, obtains the first modulation wave signal M1, the second modulation wave signal M2And the 3rd modulation wave signal M3；Will
Modulation wave signal M1、M2And M3Input comparator is compared with sawtooth carrier wave respectively, obtains the first logical signal C1, second
Logical signal C2And the 3rd logical signal C3；By load voltage signal voInput zero-crossing comparator, obtains the 4th logic letter
Number C4；By logical signal C1、C2Input logic circuit is distinguished with the signal of determinating mode 1, pattern 2, in logic circuit
Middle logical signal C1Logical AND gate, logical signal C are accessed with the signal of determinating mode 12Connect with the signal of determinating mode 2
After entering logical AND gate, then access the pwm control signal Q that logic sum gate obtains main switchm；By logical signal C2、
C3Distinguish input logic circuit, in logic circuits logical signal C3After first passing through logic inverter, and logical signal C2One
Rise after accessing logical AND gate, then the PWM that logical AND gate obtains the first auxiliary switch is accessed with the signal of determinating mode 2
Control signal Qx1；By logical signal C4Input logic circuit, first pass through in logic circuits logic inverter obtain second,
The pwm control signal Q of the 3rd switching tube2/Q3Afterwards, then through logic inverter obtain the PWM of the first, the 4th switching tube
Control signal Q1/Q4；By the pwm control signal Q of main switchmInput frequency dividing circuit, obtains the first master switch respectively
Pwm control signal Qm1With the pwm control signal Q of the second master switchm2；Pwm control signal Qm1、Qm2、
Qx1、Qx2、Q1/Q4、Q2/Q3Input driving circuit obtains power tube S respectivelym1、Sm2、Sx1、Sx2、S1/S4、S2/S3
Drive signal, control quasi-single-stage inverter.
The concrete operating principle of the present invention is described with reference to 2～accompanying drawing of accompanying drawing 10.Understand that whole inverter is operated in by accompanying drawing 2
Under both of which.In pattern 1, output is directly provided by DC source, and in addition unnecessary DC power supply terminal is defeated
Enter power and be introduced into auxiliary circuit to be stored on auxiliary capacitor, as shown in accompanying drawing 2, region A and region B represent mould respectively
Power and unnecessary power needed for exporting in formula 1.In pattern 2, DC power supply terminal input power Jing isolating transformer is passed
Pass secondary, but the input power be not enough to provide the power needed for output loading completely, wherein not enough part then by
The auxiliary capacitor of energy storage in pattern 1 is provided, DC input power and auxiliary in region C and region D difference intermediate schemes 2
The power for helping electric capacity to discharge.Active auxiliary circuit is introduced by the power ripple brought by output, DC power supply terminal is only
There is dc power to be essentially free of low frequency power ripple, therefore do not need big electrochemical capacitor to filter low frequency power in circuit
Ripple.
As auxiliary circuit assume responsibility for the unnecessary power of DC power supply terminal, i.e. power ripple, so auxiliary induction current reference
iLx *Can be by power ripple PripAnd input voltage VinTry to achieve：
In formula, Vo、IoFor load voltage, the amplitude of load current.
For traditional single-phase inverter, Instantaneous input power is equal to instantaneous output, then has：
The current average for flowing through isolating transformer former limit is：
In order to realize input current IinIt is constant, expect that primary current is also definite value：
Then now the modulating wave of main switch dutycycle is represented by：
If the control signal of main switch is by carrier signal and modulating wave M3Relatively produce, so as to provide constant input
Power, then by auxiliary capacitor by auxiliary switch transmission, auxiliary switch is accounted for the power ripple needed for output AC power
The modulating wave of empty ratio is represented by：
Below the working condition of each switch mode is made a concrete analysis of.
Before analysis, first make the following assumptions：1. all switching tubes and diode are ideal component；2. ignore isolation to become
The leakage inductance of depressor.
Below the working condition of each switch mode under pattern 1 is made a concrete analysis of.
1. mode 1 [corresponding to accompanying drawing 3] is switched
Sm1Open-minded, a part of A of DC power supply terminal input power is delivered to transformer secondary, another part power B flow directions
Auxiliary circuit, is finally stored in auxiliary capacitor CxOn.
2. mode 2 [corresponding to accompanying drawing 4] is switched
Sm1Shut-off, auxiliary circuit continues to work, until unnecessary power B is transferred completely into auxiliary capacitor CxOn, it is auxiliary
Circuit is helped to quit work.
3. mode 3 [corresponding to accompanying drawing 5] is switched
Now isolating transformer primary circuit does not work, filter inductance electric current iLfRectified diode continuousing flow.
4. mode 4 [corresponding to accompanying drawing 6] is switched
As, in push-pull circuit, the corresponding switching tube of two windings of isolating transformer former limit is to hand in a switch periods
What temporary substitute was made, so this stage, Sm2Open-minded, a part of A of DC power supply terminal input power is still delivered to transformer secondary,
Another part power B then flows to auxiliary circuit.
5. mode 5 [corresponding to accompanying drawing 4] is switched
As 1 time switch mode 2 of this mode and pattern, auxiliary circuit works on.
6. mode 6 [corresponding to accompanying drawing 5] is switched
Isolating transformer primary circuit does not work, the rectified diode continuousing flow of filter inductance electric current.
Below the working condition of each switch mode under pattern 2 is made a concrete analysis of.
1. mode 1 [corresponding to accompanying drawing 7] is switched
Sm1Open-minded, DC power supply terminal input power C is all delivered to transformer secondary.
2. mode 2 [corresponding to accompanying drawing 8] is switched
Sx1、Sm1Conducting, auxiliary capacitor CxPart D of the output more than input power is transmitted to transformer secondary, i.e.,
DC power supply terminal input power is not enough to provide the whole power needed for output, and not enough part is by having charged in mode 1
Auxiliary capacitor is provided.
3. mode 3 [corresponding to accompanying drawing 5] is switched
Sx1And Sm1Shut-off, isolating transformer primary circuit do not work.
4. mode 4 [corresponding to accompanying drawing 9] is switched
This stage, Sm2Open-minded, as with 2 times switch mode 1 of pattern, DC power supply terminal input power C is all delivered to
Transformer secondary.
5. mode 4 [corresponding to accompanying drawing 10] is switched
This stage, Sx1、Sm2Conducting, auxiliary capacitor CxSupplement input power to be not enough to be supplied to the part D of output.
6. mode 4 [corresponding to accompanying drawing 5] is switched
Sx1And Sm2Shut-off, the rectified diode continuousing flow of filter inductance electric current.
Figure 11 is that the present invention is applied to input current, auxiliary capacitor voltage, filtered electrical under load voltage 110V/50Hz occasions
The simulation waveform of inducing current and load voltage.As the power ripple brought by AC load introduces active auxiliary circuit, institute
Big electrochemical capacitor is not arranged in circuit filter low frequency power ripple.By simulation waveform as can be seen that the quasi-single-stage
The input side of inverter is almost without low-frequency ripple.
Description more than is it is known that the quasi-single-stage inverter and its controlling party of a kind of no electrolytic capacitor proposed by the present invention
Method has the advantages that following several respects：
1) as the two frequency multiplication pulsating powers that AC load is brought are flow through from auxiliary circuit, so direct current input side is in principle
Without power ripple.
2) electric capacity in circuit simultaneously need not choose electrochemical capacitor, can choose the higher electric capacity of life-span length, reliability, for example
Thin-film capacitor etc..
3) voltage stress of polarity inversion converter bridge switching parts pipe it is low and be zero-voltage and zero-current switch, improve the effect of inverter
Rate.
Claims (2)
1. a kind of quasi-single-stage inverter of no electrolytic capacitor, including DC source, input filter capacitor (1), main switch (2),
Isolating transformer (3), rectification circuit (4), filter circuit (5), polarity inversion inverter bridge (6) and load (7), wherein master switch
Including two switching tubes, isolating transformer (3) includes three windings to pipe (2), and the positive pole of DC source connects input filter capacitor (1)
One end, the negative pole of DC source, the other end of input filter capacitor (1), the emitter stage of the first main switch and the second master
The emitter stage of switching tube is connected, and the different name of the first winding terminates the colelctor electrode of the first main switch, the first winding it is of the same name
The different name end of the second winding is terminated, the colelctor electrode of second main switch of termination of the same name of the second winding, rectification circuit (4) include
Four diodes, the anode of the first commutation diode, the negative electrode of the second commutation diode are connected with the Same Name of Ends of the tertiary winding
Connect, the anode of the 3rd commutation diode, the negative electrode of the 4th commutation diode are connected with the different name end of the tertiary winding, first
The negative electrode of commutation diode and the 3rd commutation diode connects and composes the positive output end of rectification circuit (4), the second commutation diode
The negative output terminal of rectification circuit (4) is connected and composed with the anode of the 4th commutation diode, polarity inversion inverter bridge (6) is including four
Switching tube, the positive output end of termination rectification circuit (4) of filter inductance, the other end of filter inductance, the one of filter capacitor
The colelctor electrode of end, the colelctor electrode of first switch pipe and the 3rd switching tube is connected, the other end of filter capacitor, rectification circuit
(4) emitter stage of negative output terminal, the emitter stage of second switch pipe and the 4th switching tube is connected, the transmitting of first switch pipe
Pole is connected with the colelctor electrode of second switch pipe and constitutes the positive output end of polarity inversion inverter bridge (6), the emitter stage of the 3rd switching tube
It is connected with the colelctor electrode of the 4th switching tube and constitutes the negative output terminal of polarity inversion inverter bridge (6), polarity inversion inverter bridge (6) is just
One end of output terminating load (7), the other end of the negative output terminating load (7) of polarity inversion inverter bridge (6), it is characterised in that：
Also include active auxiliary circuit (8)；Wherein active auxiliary circuit (8) includes auxiliary induction, auxiliary capacitor, two auxiliary
Diode and two auxiliary switches, the anode of the first booster diode connect the positive pole of DC source, the first booster diode
The colelctor electrode of negative electrode, the anode of auxiliary capacitor and the second auxiliary switch be connected, it is the negative terminal of auxiliary capacitor, second auxiliary
The emitter stage of the anode and the first auxiliary switch of diode is helped to be connected, the colelctor electrode of the first auxiliary switch, auxiliary electricity
One end of sense is connected with the negative pole of DC source, the other end of auxiliary induction, the negative electrode of the second booster diode and second
The emitter stage of auxiliary switch is connected.
2. a kind of quasi-single-stage inverter of no electrolytic capacitor as claimed in claim 1, it is characterised in that the quasi-single-stage
The control method of inverter is comprised the following steps：
Step A, detects auxiliary induction current signal, auxiliary capacitor voltage signal, load voltage signal；
Step B, the auxiliary induction current signal that step A is obtained obtain its low frequency component through low pass filter；
Step C, calculates the difference of auxiliary induction current reference signal and auxiliary induction electric current low frequency component；
Step D, the auxiliary capacitor voltage signal that step A is obtained obtain its DC component through low pass filter；
Step E, calculates the difference of auxiliary capacitor voltage reference signal and auxiliary capacitor voltage DC component, by the electricity for obtaining
Pressure difference is adjusted with PI controllers, obtains auxiliary capacitor voltage disturbance signal；
Step F, the current differential that step C is obtained is adjusted with P controller, and be subsequently adding that step E obtains is auxiliary
Capacitance voltage disturbing signal is helped, the modulation wave signal of quasi-single-stage inverter auxiliary induction electric current is obtained；
Step G, the modulation wave signal input comparator of aforementioned auxiliary induction electric current is compared with sawtooth carrier wave, obtains second
The pwm control signal of auxiliary switch；
Step H, the auxiliary capacitor voltage signal that step A is obtained, load voltage signal are input into modulating wave respectively and calculate mould
Block, obtains first, second, third modulation wave signal；
Step I, by aforementioned first, second, third modulation wave signal, input comparator is compared with sawtooth carrier wave respectively, is obtained
First, second, third logical signal；
Step J, the load voltage signal input zero-crossing comparator that step A is obtained, obtains the 4th logical signal；
Step K, by aforementioned first, second logical signal and determinating mode 1, the signal difference input logic circuit of pattern 2,
The signal of the first logical signal and determinating mode 1 accesses logical AND gate, the second logical signal and judges mould in logic circuits
After the signal of formula 2 accesses logical AND gate, then access the pwm control signal that logic sum gate obtains main switch；
Aforementioned second, third logical signal is distinguished into input logic circuit, the 3rd logical signal is first passed through in logic circuits
After logic inverter, and after the second logical signal accesses logical AND gate together, then logical AND is accessed with the signal of determinating mode 2
Door obtains the pwm control signal of the first auxiliary switch；
By aforementioned 4th logical signal input logic circuit, logic inverter is first passed through in logic circuits and obtains second, third
After the pwm control signal of switching tube, then the pwm control signal that the first, the 4th switching tube is obtained through logic inverter；
Step L, the pwm control signal input frequency dividing circuit of the main switch that step K is obtained, obtains first respectively
The pwm control signal of the pwm control signal of master switch and the second master switch；
Step M, the second auxiliary switch pwm control signal that respectively step G is obtained, step K obtain first
The pwm control signal of the pwm control signal and first, second, third and fourth switching tube of auxiliary switch,
The pwm control signal of the first master switch that step L is obtained, the pwm control signal input of the second master switch drive electricity
Rood is to two main switches, the drive signal of four switching tubes of two auxiliary switches and polarity inversion inverter bridge, control
Quasi-single-stage inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510740317.3A CN106655738B (en) | 2015-11-02 | 2015-11-02 | A kind of the quasi-single-stage inverter and its control method of no electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510740317.3A CN106655738B (en) | 2015-11-02 | 2015-11-02 | A kind of the quasi-single-stage inverter and its control method of no electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106655738A true CN106655738A (en) | 2017-05-10 |
| CN106655738B CN106655738B (en) | 2019-04-16 |
Family
ID=58851161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510740317.3A Active CN106655738B (en) | 2015-11-02 | 2015-11-02 | A kind of the quasi-single-stage inverter and its control method of no electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106655738B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183621A (en) * | 2018-03-13 | 2018-06-19 | 刘钰山 | A kind of single-phase quasi- Z-source inverter and its power density based on SiC improve method |
| CN113489362A (en) * | 2021-07-04 | 2021-10-08 | 西北工业大学 | Novel isolated single-stage four-quadrant inverter for capacitor energy storage |
| CN116995903A (en) * | 2023-09-26 | 2023-11-03 | 深圳市德兰明海新能源股份有限公司 | Double frequency ripple current control method and device and computer equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6330170B1 (en) * | 1999-08-27 | 2001-12-11 | Virginia Tech Intellectual Properties, Inc. | Soft-switched quasi-single-stage (QSS) bi-directional inverter/charger |
| WO2011014337A1 (en) * | 2009-07-31 | 2011-02-03 | Solarbridge Technologies, Inc. | Apparatus for converting direct current to alternating current |
| CN102522766A (en) * | 2011-11-04 | 2012-06-27 | 浙江大学 | Flyback type miniature photovoltaic grid connected inverter with power decoupling circuit and control method thereof |
| CN103618470A (en) * | 2013-12-03 | 2014-03-05 | 东南大学 | Photovoltaic grid-connection micro inverter and power decoupling control method |
-
2015
- 2015-11-02 CN CN201510740317.3A patent/CN106655738B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6330170B1 (en) * | 1999-08-27 | 2001-12-11 | Virginia Tech Intellectual Properties, Inc. | Soft-switched quasi-single-stage (QSS) bi-directional inverter/charger |
| WO2011014337A1 (en) * | 2009-07-31 | 2011-02-03 | Solarbridge Technologies, Inc. | Apparatus for converting direct current to alternating current |
| CN102522766A (en) * | 2011-11-04 | 2012-06-27 | 浙江大学 | Flyback type miniature photovoltaic grid connected inverter with power decoupling circuit and control method thereof |
| CN103618470A (en) * | 2013-12-03 | 2014-03-05 | 东南大学 | Photovoltaic grid-connection micro inverter and power decoupling control method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183621A (en) * | 2018-03-13 | 2018-06-19 | 刘钰山 | A kind of single-phase quasi- Z-source inverter and its power density based on SiC improve method |
| CN108183621B (en) * | 2018-03-13 | 2024-02-20 | 刘钰山 | Power density improving method of single-phase quasi-Z source inverter based on SiC |
| CN113489362A (en) * | 2021-07-04 | 2021-10-08 | 西北工业大学 | Novel isolated single-stage four-quadrant inverter for capacitor energy storage |
| CN113489362B (en) * | 2021-07-04 | 2024-01-16 | 西北工业大学 | Isolated single-stage four-quadrant inverter with capacity for energy storage |
| CN116995903A (en) * | 2023-09-26 | 2023-11-03 | 深圳市德兰明海新能源股份有限公司 | Double frequency ripple current control method and device and computer equipment |
| CN116995903B (en) * | 2023-09-26 | 2024-03-15 | 深圳市德兰明海新能源股份有限公司 | Double frequency ripple current control method and device and computer equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106655738B (en) | 2019-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106059306B (en) | A kind of multiple-unit diode capacitance network high-gain full-bridge isolated DC converter | |
| CN102856916A (en) | Reactive power control method and circuit of single-phase photovoltaic inverter | |
| CN102088192B (en) | Single-phase single-stage current type photovoltaic grid inverter and control method thereof | |
| CN103051233A (en) | Non-isolated single-phase photovoltaic grid-connected inverter and on-off control timing sequence thereof | |
| CN103986330A (en) | Resonance boost DC/DC converter and control method thereof suitable for high-voltage and high-power occasions | |
| CN102361408A (en) | Non-isolated photovoltaic grid-connected inverter and switching control time sequence thereof | |
| CN112234808A (en) | Double-frequency ripple suppression circuit and suppression method of single-phase inverter | |
| CN107370392A (en) | Towards the electric power electric transformer of mesohigh intelligent distribution network | |
| CN202586797U (en) | Five-level variable-current topological structure with bidirectional power switches and application thereof | |
| CN103956927A (en) | Voltage-active-clamping non-transformer-type single-phase photovoltaic inverter | |
| CN108616224A (en) | A kind of single-phase seven electrical level inverter of booster type | |
| CN103887981A (en) | Full-bridge DC-DC converter | |
| CN115051565A (en) | Bidirectional half-bridge direct-current converter grid-connected inverter and ripple wave control method | |
| CN106685251A (en) | Single-inductor dual-Buck full-bridge inverter with diode series and parallel structure and control method of single-inductor dual-Buck full-bridge inverter | |
| CN107565814A (en) | A kind of quasi- Z source switch boosting inverters of high-gain suitable for fuel cell power generation | |
| CN106655738A (en) | Electrolytic capacitor-free quasi single stage inverter and control method therefor | |
| CN106712523A (en) | Boost three-level full-bridge inverter and control method thereof | |
| CN104065293A (en) | Transformer-free type single-phase photovoltaic inverter with mixed voltage clamping | |
| CN105226986A (en) | A kind of inverter and control method thereof eliminating the pulsation of input side secondary power | |
| CN105226925B (en) | A kind of inverse-excitation type single-phase inverter and its control method | |
| CN105207507A (en) | MMC sub-module for reducing capacitance volume | |
| CN106655862B (en) | A kind of non-isolation type inverter and its control method inhibiting ripple | |
| CN201898331U (en) | Step up/down DC AFC | |
| CN204696955U (en) | A kind of photovoltaic DC-to-AC converter adopting transformer auxiliary resonance | |
| CN203883678U (en) | Full-bridge DC-DC converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |