CN103117673A - Monophase full-bridge inverter circuit and modulation method thereof - Google Patents
Monophase full-bridge inverter circuit and modulation method thereof Download PDFInfo
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- CN103117673A CN103117673A CN2013100374541A CN201310037454A CN103117673A CN 103117673 A CN103117673 A CN 103117673A CN 2013100374541 A CN2013100374541 A CN 2013100374541A CN 201310037454 A CN201310037454 A CN 201310037454A CN 103117673 A CN103117673 A CN 103117673A
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Abstract
Disclosed are a monophase full-bridge inverter circuit and a modulation method thereof. The monophase full-bridge inverter circuit comprises a bus capacitor, a full-bridge inverter circuit, a filter circuit, a first reverse-resistance IGBT (insulated gate bipolar transistor) and a second reverse-resistance IGBT. Input ends M and N of the inverter circuit are correspondingly connected with a positive electrode and a negative electrode of the bus capacitor, and output ends A and B of the inverter circuit are connected with the filter circuit. A collector and an emitter of each of the first IGBT and the second IGBT are correspondingly connected with the output end A and the output end B. Each bridge arm of the inverter circuit comprises a switch tube and an inverse-joint diode, an emitter of the first bridge arm and a collector of the second bridge arm are connected with the output end A, and an emitter of the third bridge arm and a collector of the fourth bridge arm are connected with the output end B. A collector of the first bridge arm and a collector of the third bridge arm are connected with the input end M, and an emitter of the second bridge arm and an emitter of the fourth bridge arm are connected with the input end N. Based on the above circuit, the modulation method includes controlling the second IGBT to make in the positive half circle of output voltage and controlling the first IGBT to make in the negative half circle. By the monophase full-bridge inverter circuit, efficiency of inverters is improved, pulse of common mode voltage can be effectively suppressed, and modulation effect is better.
Description
Technical field
The present invention relates to a kind of single-phase full bridge inverter circuit, also relate to the method that this circuit is modulated.
Background technology
As shown in Figure 1, existing single-phase inversion circuit comprises bus capacitor 10, full-bridge circuit 100 and the filter circuit that is connected in direct-flow input end, two ends, output terminals A, the B that input M, the N of full-bridge circuit 100 is connected to bus capacitor 10 is connected to the two ends of filter circuit, M is connected with the positive pole of bus capacitor 10, and the N point is connected with the negative pole of bus capacitor 10.Filter circuit is the LC filter circuit, in full-bridge circuit, the LC filter circuit is comprised of inductance L 20, capacitor C 30, each brachium pontis of full-bridge circuit 100 comprises switching tube (S1, S2, S3, S4, can adopt IGBT or metal-oxide-semiconductor etc.) and Opposite direction connection at the diode at switching tube collector and emitter two ends, the collector electrode of the emitter of the first brachium pontis switching tube S1 and the second brachium pontis switching tube S2 is connected in an A, and the collector electrode of the emitter of the 3rd brachium pontis switching tube S3 and the 4th brachium pontis switching tube S4 is connected in a B; The collector electrode of the collector electrode of the first brachium pontis switching tube S1 and the 3rd brachium pontis switching tube S3 is connected in a M, and the emitter of the emitter of the second brachium pontis switching tube S2 and the 4th brachium pontis switching tube S4 is connected in a N.
In order to make the output waveform quality good, the switch motion number of times is few, reduce the wastage, existing single-phase inversion circuit often adopts Unipolar SPWM (Sinusoidal Pulse Width Modulation Using Sinusoidal Pulse Width Modulation) modulation system to modulate, concrete modulation system is as follows: at the positive half cycle of modulating wave, S1 is conducting always, S3 and S4 are in the high frequency modulated state, and inversion circuit is S1-load-S4, and continuous current circuit is S1-load-S3.At the modulating wave negative half period, S2 is conducting always, and S3 and S4 are in the high frequency modulated state, and inversion circuit is S2-load-S3, and continuous current circuit is S2-load-S4.
In existing single-phase inversion circuit and modulator approach thereof, have following defective: the output terminals A of full-bridge circuit 100,2 of B can produce larger common-mode voltage pulsation to the bus mid point, thereby form larger common mode leakage current in grounded circuit, not only increased the loss of circuit, and personal safety has been consisted of significant threat.
Summary of the invention
One of the technical problem to be solved in the present invention is, a kind of single-phase full bridge inverter circuit is provided, and overcomes the defective that existing single-phase inversion circuit exists common-mode voltage pulsation and common mode leakage current.
Two of the technical problem to be solved in the present invention is, a kind of modulator approach of single-phase full bridge inverter circuit is provided, and overcomes existing single-phase inversion circuit modulator approach and makes the single-phase inversion circuit have the defective of common-mode voltage pulsation and common mode leakage current.
The present invention solves the technical scheme that one of its technical problem adopts: construct a kind of single-phase full bridge inverter circuit, comprise the bus capacitor, full-bridge circuit and the filter circuit that are connected in direct-flow input end;
An input M of this full-bridge circuit connects the positive pole of this bus capacitor, and another input N of this full-bridge circuit connects the negative pole of this bus capacitor; The output terminals A of this full-bridge circuit, B are connected with this filter circuit;
Each brachium pontis of this full-bridge circuit comprises that switching tube and Opposite direction connection are at the diode at switching tube collector and emitter two ends, the collector electrode of the emitter of the first brachium pontis switching tube and the second brachium pontis switching tube is connected in output point A, and the collector electrode of the emitter of the 3rd brachium pontis switching tube and the 4th brachium pontis switching tube is connected in output point B; The collector electrode of the collector electrode of the first brachium pontis switching tube and the 3rd brachium pontis switching tube is connected in input point M, and the emitter of the emitter of the second brachium pontis switching tube and the 4th brachium pontis switching tube is connected in input point N;
It is characterized in that, this full bridge inverter also comprises the first reverse blocking IGBT and the second reverse blocking IGBT, the collector electrode of this first reverse blocking IGBT is connected with described A point, emitter is connected with described B point, and the emitter of this second reverse blocking IGBT is connected with described A point, collector electrode is connected with described B point.
In single-phase full bridge inverter circuit of the present invention, described filter circuit is LC filter circuit or LCL filter circuit.
In single-phase full bridge inverter circuit of the present invention, the induction reactance of the inductance one in described LCL filter circuit equates with the induction reactance of inductance two.
In single-phase full bridge inverter circuit of the present invention, described the first brachium pontis switching tube, the second brachium pontis switching tube, the 3rd brachium pontis switching tube, the 4th brachium pontis switching tube are the same model switching tube.
The present invention solves the technical scheme that two of its technical problem adopts: a kind of modulator approach of single-phase full bridge inverter circuit is provided, and described single-phase full bridge inverter circuit comprises bus capacitor, full-bridge circuit and the filter circuit that is connected in direct-flow input end;
An input M of this full-bridge circuit connects the positive pole of this bus capacitor, and another input N of this full-bridge circuit connects the negative pole of this bus capacitor; The output terminals A of this full-bridge circuit, B are connected with this filter circuit;
Each brachium pontis of this full-bridge circuit comprises that switching tube and Opposite direction connection are at the diode at switching tube collector and emitter two ends, the collector electrode of the emitter of the first brachium pontis switching tube and the second brachium pontis switching tube is connected in output point A, and the collector electrode of the emitter of the 3rd brachium pontis switching tube and the 4th brachium pontis switching tube is connected in output point B; The collector electrode of the collector electrode of the first brachium pontis switching tube and the 3rd brachium pontis switching tube is connected in input point M, and the emitter of the emitter of the second brachium pontis switching tube and the 4th brachium pontis switching tube is connected in input point N;
This full bridge inverter also comprises the first reverse blocking IGBT and the second reverse blocking IGBT, the collector electrode of this first reverse blocking IGBT is connected with described A point, emitter is connected with described B point, and the emitter of this second reverse blocking IGBT is connected with described A point, collector electrode is connected with described B point;
It is characterized in that, described method comprises:
If described full-bridge circuit output voltage polarity reference direction take A higher than B as positive direction;
At the output voltage positive half period, control the conducting always of described the second reverse blocking IGBT; When the output current direction by A during to B, current circuit in a switch periods is: described the first brachium pontis switching tube is opened, the 4th brachium pontis switching tube is opened, when the first reverse blocking IGBT turn-offs, electric current flows to described the first brachium pontis switching tube by described bus capacitor positive pole, flow to described the 4th brachium pontis switching tube through overload and described filter circuit again, get back to the bus capacitor negative pole; When described the first brachium pontis switching tube turn-offs, the 4th brachium pontis switching tube turn-offs, when the first reverse blocking IGBT is opened, electric current is by described the second reverse blocking IGBT afterflow; When the output current direction by B during to A, current circuit is in a switch periods: described the first brachium pontis switching tube is opened, the 4th brachium pontis switching tube is opened, when the first reverse blocking IGBT turn-offs, electric current is flowed to the diode of described the 4th brachium pontis by the bus capacitor negative pole, flow to again the diode of described the first brachium pontis through overload and filter circuit, get back to described bus capacitor anodal; When described the first brachium pontis switching tube shutoff, the 4th brachium pontis switching tube shutoff, the first reverse blocking IGBT conducting, electric current is by described the first reverse blocking IGBT afterflow;
At the output voltage negative half-cycle, control the conducting always of described the first reverse blocking IGBT; When output current by A during to B, current circuit in a switch periods is: described the second brachium pontis switching tube is opened, the 3rd brachium pontis switching tube is opened, when the second reverse blocking IGBT turn-offs, electric current is by the diode of described bus capacitor negative pole to described the second brachium pontis, through the diode of load and described filter circuit to the three brachium pontis, get back to the bus capacitor positive pole; When described the second brachium pontis switching tube shutoff, the 3rd brachium pontis switching tube shutoff, the second reverse blocking IGBT conducting, electric current is through the second reverse blocking IGBT afterflow; When output current by B during to A, current circuit in a switch periods is: described the second brachium pontis switching tube is opened, the 3rd brachium pontis switching tube is opened, when the second reverse blocking IGBT turn-offs, electric current is by described bus capacitor positive pole to the three brachium pontis switching tubes, flow to the second brachium pontis switching tube through overload and described filter circuit again, get back to the bus capacitor negative pole; When the second brachium pontis switching tube shutoff, the 3rd brachium pontis switching tube shutoff, the second reverse blocking IGBT conducting, electric current is through described the first reverse blocking IGBT afterflow.
In the modulator approach of single-phase full bridge inverter circuit of the present invention, described filter circuit is LC filter circuit or LCL filter circuit.
In the modulator approach of single-phase full bridge inverter circuit of the present invention, the induction reactance of the inductance one in described LCL filter circuit equates with the induction reactance of inductance two.
In the modulator approach of single-phase full bridge inverter circuit of the present invention, described the first brachium pontis switching tube, the second brachium pontis switching tube, the 3rd brachium pontis switching tube, the 4th brachium pontis switching tube are the same model switching tube.
Implement single-phase full bridge inverter circuit of the present invention and modulator approach thereof, compared with the prior art, its beneficial effect is:
1. because the single-phase full bridge inverter circuit has increased first, second reverse blocking IGBT, make continuous current circuit only pass through this first, second reverse blocking IGBT, the conduction loss of continuous current circuit will be less, thereby improve the efficient of whole inverter;
2. when the first brachium pontis switching tube, the second brachium pontis switching tube, the 3rd brachium pontis switching tube, the 4th brachium pontis switching tube selection same model switching tube, can make the current waveform of this first, second, third and fourth brachium pontis switching tube symmetrical, at continuous current circuit A, the current potential that B is 2 is clamped at the bus mid point, can effectively suppress the pulsation of common-mode voltage;
3. simple in structure, modulation effect is good.
Description of drawings
Fig. 1 is existing single-phase full bridge inverter circuit figure.
Fig. 2 is the circuit diagram of single-phase full bridge inverter circuit of the present invention.
Fig. 3 to Figure 10 is that the circuit flow of single-phase full bridge inverter circuit in the modulator approach of single-phase full bridge inverter circuit of the present invention is to schematic diagram.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 2, single-phase full bridge inverter circuit of the present invention comprises bus capacitor 10, full-bridge circuit 100, LCL filter and reverse blocking IGBT-S5 and the S6 that is connected in direct-flow input end.Wherein:
The LCL filter comprises the inductance 20, electric capacity 30 and the inductance 50(that are connected in series successively in other embodiments, can adopt the LC filter to replace the LCL filter, also can realize the object of the invention).
The positive pole of an input M connection bus electric capacity 10 of full-bridge circuit 100, the negative pole of another input N connection bus electric capacity 10.2 of the output terminals A of full-bridge circuit 100, B are connected with inductance by inductance 20 and are connected with this LC filter.
Each brachium pontis of full-bridge circuit 100 comprises that switching tube (can adopt IGBT, metal-oxide-semiconductor etc.) and Opposite direction connection are at the diode at switching tube collector and emitter two ends.The collector electrode of the emitter of the first brachium pontis switching tube S1 and the second brachium pontis switching tube S2 is connected in output point A, and the collector electrode of the emitter of the 3rd brachium pontis switching tube S3 and the 4th brachium pontis switching tube S4 is connected in output point B; The collector electrode of the collector electrode of the first brachium pontis switching tube S1 and the 3rd brachium pontis switching tube S3 is connected in input point M, and the emitter of the emitter of the second brachium pontis switching tube S2 and the 4th brachium pontis switching tube S4 is connected in input point N.
The collector electrode of reverse blocking IGBT-S5 is connected with the A point, emitter is connected with the B point, and the emitter of reverse blocking IGBT-S6 is connected with the A point, collector electrode is connected with the B point.
The induction reactance of choosing inductance 20 equates with the induction reactance of inductance 50, can keep the symmetry of the common mode impedance loop parameter of output point A and B, is conducive to further suppress the common mode leakage current.
Choose the first brachium pontis switching tube S1, the second brachium pontis switching tube S2, the 3rd brachium pontis switching tube S3, the 4th brachium pontis switching tube S4 are the same model switching tube, can suppress better the pulsation of common-mode voltage.
The single-phase full bridge inverter circuit of the modulator approach of a kind of single-phase full bridge inverter circuit of the present invention such as above-mentioned single-phase full bridge inverter circuit of the present invention, (hypothesis of full-bridge circuit output voltage polarity positive direction is the convenience in order to describe just as positive direction higher than B if full-bridge circuit output voltage polarity reference direction is take A, establishing full-bridge circuit output voltage polarity reference direction take B higher than A during as positive direction, the modulation effect of the inventive method is also just the same).
Method of the present invention comprises:
At the output voltage positive half period, control reverse blocking IGBT-S6 conducting always.When the output current direction by A during to B, current circuit in a switch periods is: the first brachium pontis switching tube S1 opens, the 4th brachium pontis switching tube S4 opens, the first reverse blocking IGBT-when S5 turn-offs, electric current flows to the first brachium pontis switching tube S1 by bus capacitor 10 positive poles, be connected to electric capacity 30 two ends through overload 60(again) and the LC filter flow to the 4th brachium pontis switching tube S4, get back to the negative pole of bus capacitor 10.When the first brachium pontis switching tube S1 turn-offs, the 4th brachium pontis switching tube S4 turn-offs, the first reverse blocking IGBT-when S5 opened, electric current was by reverse blocking IGBT-S6 afterflow.When the output current direction by B during to A, current circuit is in a switch periods: the first brachium pontis switching tube S1 opens, the 4th brachium pontis switching tube S4 opens, reverse blocking IGBT-when S5 turn-offs, electric current is flowed to the diode of the 4th brachium pontis S4 by the negative pole of bus capacitor 10, flow to again the diode of the first brachium pontis through overload 60 and LC filter, get back to the positive pole of bus capacitor 10; When the first brachium pontis switching tube S1 turn-offs, the 4th brachium pontis switching tube S4 turn-offs, during reverse blocking IGBT-S5 conducting, electric current is by reverse blocking IGBT-S5 afterflow.
At the output voltage negative half-cycle, control reverse blocking IGBT-S5 conducting always.When output current by A during to B, current circuit in a switch periods is: the second brachium pontis switching tube S2 opens, the 3rd brachium pontis switching tube S3 opens, reverse blocking IGBT-when S6 turn-offs, electric current is by the negative pole of bus capacitor 10 diode to the second brachium pontis, through the diode of load 60 and LC filter to the three brachium pontis, get back to the positive pole of bus capacitor 10.When the second brachium pontis switching tube S2 turn-offs, the 3rd brachium pontis switching tube S3 turn-offs, during reverse blocking IGBT-S6 conducting, electric current is through reverse blocking IGBT-S6 afterflow; When output current by B during to A, current circuit in a switch periods is: the second brachium pontis switching tube S2 opens, the 3rd brachium pontis switching tube S3 opens, reverse blocking IGBT-when S6 turn-offs, electric current is by positive pole to the three brachium pontis switching tube S3 of bus capacitor 10, flow to the second brachium pontis switching tube S2 through overload 60 and LC filter again, get back to the negative pole of bus capacitor 10.When the second brachium pontis switching tube S2 turn-offs, the 3rd brachium pontis switching tube S3 turn-offs, during reverse blocking IGBT-S6 conducting, electric current is through reverse blocking IGBT-S5 afterflow.
Claims (8)
1. a single-phase full bridge inverter circuit, comprise the bus capacitor, full-bridge circuit and the filter circuit that are connected in direct-flow input end;
An input M of this full-bridge circuit connects the positive pole of this bus capacitor, and another input N of this full-bridge circuit connects the negative pole of this bus capacitor; The output terminals A of this full-bridge circuit, B are connected with this filter circuit;
Each brachium pontis of this full-bridge circuit comprises that switching tube and Opposite direction connection are at the diode at switching tube collector and emitter two ends, the collector electrode of the emitter of the first brachium pontis switching tube and the second brachium pontis switching tube is connected in output point A, and the collector electrode of the emitter of the 3rd brachium pontis switching tube and the 4th brachium pontis switching tube is connected in output point B; The collector electrode of the collector electrode of the first brachium pontis switching tube and the 3rd brachium pontis switching tube is connected in input point M, and the emitter of the emitter of the second brachium pontis switching tube and the 4th brachium pontis switching tube is connected in input point N;
It is characterized in that, this full bridge inverter also comprises the first reverse blocking IGBT and the second reverse blocking IGBT, the collector electrode of this first reverse blocking IGBT is connected with described A point, emitter is connected with described B point, and the emitter of this second reverse blocking IGBT is connected with described A point, collector electrode is connected with described B point.
2. single-phase full bridge inverter circuit as claimed in claim 1, is characterized in that, described filter circuit is LC filter circuit or LCL filter circuit.
3. single-phase full bridge inverter circuit as claimed in claim 2, is characterized in that, the induction reactance of the inductance one in described LCL filter circuit equates with the induction reactance of inductance two.
4. single-phase full bridge inverter circuit as described in one of claims 1 to 3, is characterized in that, described the first brachium pontis switching tube, the second brachium pontis switching tube, the 3rd brachium pontis switching tube, the 4th brachium pontis switching tube are the same model switching tube.
5. the modulator approach of a single-phase full bridge inverter circuit, described full bridge inverter is as claimed in claim 1; It is characterized in that, described method comprises:
If described full-bridge circuit output voltage polarity reference direction take A higher than B as positive direction;
At the output voltage positive half period, control the conducting always of described the second reverse blocking IGBT; When the output current direction by A during to B, current circuit in a switch periods is: described the first brachium pontis switching tube is opened, the 4th brachium pontis switching tube is opened, when the first reverse blocking IGBT turn-offs, electric current flows to described the first brachium pontis switching tube by described bus capacitor positive pole, flow to described the 4th brachium pontis switching tube through overload and described filter circuit again, get back to the bus capacitor negative pole; When described the first brachium pontis switching tube turn-offs, the 4th brachium pontis switching tube turn-offs, when the first reverse blocking IGBT is opened, electric current is by described the second reverse blocking IGBT afterflow; When the output current direction by B during to A, current circuit is in a switch periods: described the first brachium pontis switching tube is opened, the 4th brachium pontis switching tube is opened, when the first reverse blocking IGBT turn-offs, electric current is flowed to the diode of described the 4th brachium pontis by the bus capacitor negative pole, flow to again the diode of described the first brachium pontis through overload and filter circuit, get back to described bus capacitor anodal; When described the first brachium pontis switching tube shutoff, the 4th brachium pontis switching tube shutoff, the first reverse blocking IGBT conducting, electric current is by described the first reverse blocking IGBT afterflow;
At the output voltage negative half-cycle, control the conducting always of described the first reverse blocking IGBT; When output current by A during to B, current circuit in a switch periods is: described the second brachium pontis switching tube is opened, the 3rd brachium pontis switching tube is opened, when the second reverse blocking IGBT turn-offs, electric current is by the diode of described bus capacitor negative pole to described the second brachium pontis, through the diode of load and described filter circuit to the three brachium pontis, get back to the bus capacitor positive pole; When described the second brachium pontis switching tube shutoff, the 3rd brachium pontis switching tube shutoff, the second reverse blocking IGBT conducting, electric current is through the second reverse blocking IGBT afterflow; When output current by B during to A, current circuit in a switch periods is: described the second brachium pontis switching tube is opened, the 3rd brachium pontis switching tube is opened, when the second reverse blocking IGBT turn-offs, electric current is by described bus capacitor positive pole to the three brachium pontis switching tubes, flow to the second brachium pontis switching tube through overload and described filter circuit again, get back to the bus capacitor negative pole; When the second brachium pontis switching tube shutoff, the 3rd brachium pontis switching tube shutoff, the second reverse blocking IGBT conducting, electric current is through described the first reverse blocking IGBT afterflow.
6. the modulator approach of single-phase full bridge inverter circuit as claimed in claim 5, is characterized in that, described filter circuit is LC filter circuit or LCL filter circuit.
7. the modulator approach of single-phase full bridge inverter circuit as claimed in claim 6, is characterized in that, the induction reactance of the inductance one in described LCL filter circuit equates with the induction reactance of inductance two.
8. the modulator approach of single-phase full bridge inverter circuit as described in one of claim 5 to 7, is characterized in that, described the first brachium pontis switching tube, the second brachium pontis switching tube, the 3rd brachium pontis switching tube, the 4th brachium pontis switching tube are the same model switching tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100374541A CN103117673A (en) | 2013-01-30 | 2013-01-30 | Monophase full-bridge inverter circuit and modulation method thereof |
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| CN2013100374541A CN103117673A (en) | 2013-01-30 | 2013-01-30 | Monophase full-bridge inverter circuit and modulation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107800314A (en) * | 2017-11-23 | 2018-03-13 | 阳光电源股份有限公司 | A kind of single-phase invertor, control method and photovoltaic generating system |
| CN108155827A (en) * | 2018-03-09 | 2018-06-12 | 浙江艾罗网络能源技术有限公司 | A kind of modified single-phase inverter |
| CN112260561A (en) * | 2020-09-23 | 2021-01-22 | 北方工业大学 | Voltage support type boost conversion circuit and grid connection method |
| CN113872456A (en) * | 2020-06-15 | 2021-12-31 | 比亚迪股份有限公司 | Inversion system |
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| CN102255546A (en) * | 2011-07-29 | 2011-11-23 | 阳光电源股份有限公司 | Inverter |
| CN102255540A (en) * | 2011-07-06 | 2011-11-23 | 阳光电源股份有限公司 | Method, circuit and converter for converting DC voltage into AC voltage |
| CN102263520A (en) * | 2011-07-08 | 2011-11-30 | 阳光电源股份有限公司 | Circuit, method and convertor for converting direct voltage into alternating voltage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102255540A (en) * | 2011-07-06 | 2011-11-23 | 阳光电源股份有限公司 | Method, circuit and converter for converting DC voltage into AC voltage |
| CN102263520A (en) * | 2011-07-08 | 2011-11-30 | 阳光电源股份有限公司 | Circuit, method and convertor for converting direct voltage into alternating voltage |
| CN102255546A (en) * | 2011-07-29 | 2011-11-23 | 阳光电源股份有限公司 | Inverter |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800314A (en) * | 2017-11-23 | 2018-03-13 | 阳光电源股份有限公司 | A kind of single-phase invertor, control method and photovoltaic generating system |
| CN107800314B (en) * | 2017-11-23 | 2020-03-24 | 阳光电源股份有限公司 | Single-phase converter, control method and photovoltaic power generation system |
| CN108155827A (en) * | 2018-03-09 | 2018-06-12 | 浙江艾罗网络能源技术有限公司 | A kind of modified single-phase inverter |
| CN113872456A (en) * | 2020-06-15 | 2021-12-31 | 比亚迪股份有限公司 | Inversion system |
| CN113872456B (en) * | 2020-06-15 | 2024-01-09 | 比亚迪股份有限公司 | Inversion system |
| CN112260561A (en) * | 2020-09-23 | 2021-01-22 | 北方工业大学 | Voltage support type boost conversion circuit and grid connection method |
| CN112260561B (en) * | 2020-09-23 | 2022-06-10 | 北方工业大学 | Voltage support type boost conversion circuit and grid connection method |
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