CN104980057A - Three-phase inverter and control method thereof - Google Patents
Three-phase inverter and control method thereof Download PDFInfo
- Publication number
- CN104980057A CN104980057A CN201510481521.8A CN201510481521A CN104980057A CN 104980057 A CN104980057 A CN 104980057A CN 201510481521 A CN201510481521 A CN 201510481521A CN 104980057 A CN104980057 A CN 104980057A
- Authority
- CN
- China
- Prior art keywords
- phase
- phase inverter
- main circuit
- inverter
- power output
- 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.)
- Pending
Links
Abstract
The invention discloses a three-phase inverter and a control method thereof. The control method comprises the steps of acquiring the current output power of a three-phase inverter; judging whether the current output power of the three-phase inverter is lower than a set threshold value; when the condition that the current output power of the three-phase inverter is lower than the set threshold value is judged, reducing the operation phase number of the three-phase inverter. Therefore, the utilization efficiency of energy sources when the three-phase inverter is in underloading can be improved.
Description
Technical field
The present invention relates to electric and electronic technical field, more particularly, relate to a kind of three-phase inverter and control method thereof.
Background technology
Three-phase inverter is the electrical energy transformer for direct current power being converted to alternating electromotive force, and as shown in Figure 1, wherein: transverse axis is power output P, the longitudinal axis is energy conversion efficiency η, A is pressure point of maximum efficiency to its typical efficiencies curve, and dash area represents light-load region.As seen from Figure 1, before reaching pressure point of maximum efficiency A, the energy conversion efficiency η of three-phase inverter reduces along with the reduction of power output P, especially when underloading, energy conversion efficiency η sharply declines with the reduction of power output P, that is, three-phase inverter has the defect that efficiency of energy utilization is lower when underloading.
Summary of the invention
In view of this, the invention provides a kind of three-phase inverter and control method thereof, to improve the efficiency of energy utilization of three-phase inverter when underloading.
A kind of three-phase converter method, comprising:
Obtain the power output that three-phase inverter is current;
Judge that whether the current power output of three-phase inverter is lower than setting threshold;
When judging to obtain the current power output of three-phase inverter lower than described setting threshold, reduce the operation number of phases of three-phase inverter.
Alternatively, before the operation number of phases of described minimizing three-phase inverter, also comprise:
Judge that obtaining the current power output of three-phase inverter exceeds setting duration lower than duration of described this state of setting threshold.
Wherein, when the grid-connected mode of connection of three-phase inverter employing three-phase three-wire system, the operation number of phases of described minimizing three-phase inverter, comprising: three-phase inverter is transform as two-phase synchronizing mode and run.
Wherein, when the grid-connected mode of connection of three-phase inverter employing three-phase four-wire system, the operation number of phases of described minimizing three-phase inverter, comprising: three-phase inverter is transform as two-phase synchronizing mode and run, or, three-phase inverter is transform as single-phase grid-connected mode and run.
Wherein, describedly three-phase inverter is transform as single-phase grid-connected mode and run, comprising: three-phase inverter is transform as single-phase semi-bridge mode operation or single-phase two brachium pontis mode operations.
A kind of three-phase inverter, the control unit comprising main circuit and be connected with main circuit, wherein, described control unit comprises:
Acquiring unit, for obtaining the current power output of main circuit;
First judging unit, for judging that whether the current power output of main circuit is lower than setting threshold;
And processing unit, for when judging to obtain the current power output of main circuit lower than described setting threshold, reduce the operation number of phases of main circuit.
Alternatively, described control unit also comprises the second judging unit;
Described second judging unit, for judging whether the current power output of main circuit exceeds setting duration lower than the duration of described this state of setting threshold;
Accordingly, described processing unit, for judge to obtain the current power output of main circuit lower than described setting threshold and the described duration exceeds described setting duration time, reduce the operation number of phases of main circuit.
Wherein, when the grid-connected mode of connection of main circuit employing three-phase three-wire system, described processing unit runs by main circuit being transform as two-phase synchronizing mode the object realizing the operation number of phases reducing main circuit.
Wherein, when main circuit adopts the grid-connected mode of connection of three-phase four-wire system, described processing unit is by transforming two-phase synchronizing mode as and run or single-phase grid-connected mode running the object realizing the operation number of phases reducing main circuit by main circuit.
Wherein, described processing unit realizes main circuit to transform as by main circuit being transform as single-phase semi-bridge mode operation or single-phase two brachium pontis mode operations the object that single-phase grid-connected mode runs.
As can be seen from above-mentioned technical scheme, the present invention is by when the current power output of three-phase inverter being detected lower than setting threshold, reduce the operation number of phases of three-phase inverter, to eliminate the power loss of the cut control circuit gone up mutually, power device, output filter circuit etc., meanwhile, electric current in all the other phases starts rising, power efficiency starts corresponding increase, thus improves the efficiency of energy utilization of whole three-phase inverter when light running.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of three-phase inverter typical efficiencies curve synoptic diagram disclosed in prior art;
Fig. 2 is a kind of three-phase converter method flow diagram disclosed in the embodiment of the present invention;
Fig. 3 is a kind of T font three-phase three-wire system combining inverter topological structure schematic diagram disclosed in prior art;
Fig. 4 is a kind of T font three-phase four-wire system combining inverter topological structure schematic diagram disclosed in prior art;
Fig. 5 is a kind of T font three-phase four-wire system combining inverter topology transformation schematic diagram disclosed in the embodiment of the present invention;
Fig. 6 is the embodiment of the present invention another T font three-phase four-wire system combining inverter topology transformation schematic diagram disclosed;
Fig. 7 is the embodiment of the present invention another three-phase converter method flow diagram disclosed;
Fig. 8 is a kind of three-phase inverter structural representation disclosed in the embodiment of the present invention;
Fig. 9 is the embodiment of the present invention another three-phase inverter structural representation disclosed.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 2, the embodiment of the invention discloses a kind of three-phase converter method, to improve the efficiency of energy utilization of three-phase inverter when underloading, comprising:
Step S101: obtain the power output P that three-phase inverter is current;
Step S102: judge that whether the current power output P of three-phase inverter is lower than setting threshold P
0if, P < P
0, enter step S103; Otherwise, return step S101;
Step S103: the operation number of phases reducing three-phase inverter.
The present embodiment is detecting that the current power output P of three-phase inverter is lower than setting threshold P
0time, reduce the operation number of phases of three-phase inverter, as switched to two-phase to be incorporated into the power networks pattern by three-phase grid operational mode three-phase inverter, the power loss of the control circuit, power device, output filter circuit etc. in this cut phase can be eliminated like this, meanwhile, electric current in all the other two-phases starts rising, power efficiency starts corresponding increase, thus improves the efficiency of energy utilization of whole three-phase inverter when light running.Wherein, setting threshold P
0size can set according to actual needs, but it should be noted that P
0setting must meet operation of power networks specification, such as, must three-phase grid be adopted when the power output of some grid requirements inverter exceeds 5KW, so now setting threshold P
0can be set as not higher than certain value of 5KW.
In order to reduce the operation number of phases of three-phase inverter, except can two-phase be switched to be incorporated into the power networks except pattern by three-phase grid operational mode three-phase inverter, when conditions permit, also three-phase inverter can be switched to single-phase grid-connected operational mode by three-phase grid operational mode.Single-phase grid-connected operational mode can be switched to depend on the mode of connection of three-phase inverter, be specially: the inverter (being also called three-phase four-wire system combining inverter) adopting the grid-connected mode of connection of three-phase four-wire system, the grid-connected mode of connection of two-phase can be transformed into run, also can be transformed into the single-phase grid-connected mode of connection by increase switching device and run; And adopt the inverter of the grid-connected mode of connection of three-phase three-wire system (being also called three-phase three-wire system combining inverter) that the grid-connected mode of connection operation of two-phase can only be transformed into.
Below, the operational mode remodeling method of T font three-phase three-wire system combining inverter and T font three-phase four-wire system combining inverter is illustrated.
1) about the operational mode remodeling method of T font three-phase three-wire system combining inverter
Fig. 3 shows a kind of existing T font three-phase three-wire system combining inverter, it exchanges outlet side and connects R, S, T three-phase electricity through switch S 1, S2, S3 respectively, wherein, the corresponding three level brachium pontis be made up of switching tube Q1 ~ Q4 of R, the three level brachium pontis that S-phase correspondence is made up of switching tube Q5 ~ Q8, the three level brachium pontis that T-phase correspondence is made up of switching tube Q9 ~ Q12.Described T font three-phase three-wire system combining inverter has multiple two-phase synchronizing mode, is specifically described as follows:
1. S3 is disconnected, closed S1, S2; Utilize the two level brachium pontis be made up of Q1, Q4 and the two level brachium pontis be made up of Q5, Q8, composition two-phase full-bridge inverter; Rest switch pipe keeps turning off;
2. S3 is disconnected, closed S1, S2; Utilize the three level brachium pontis be made up of Q1 ~ Q4 and the three level brachium pontis be made up of Q5 ~ Q8, composition two-phase three-level inverter; Rest switch pipe keeps closing;
3. S3 is disconnected, closed S1, S2; Utilize the three level brachium pontis be made up of Q1 ~ Q4 and the two level brachium pontis be made up of Q5, Q8, the asymmetric three-level inverter of composition two-phase; Rest switch pipe keeps closing;
Above-mentioned is only the operational mode remodeling method describing several typical minimizing R phase, and the operational mode remodeling method reducing S-phase or T-phase in like manner, repeats herein no longer one by one.
2) about the operational mode remodeling method of T font three-phase four-wire system combining inverter
Fig. 4 shows a kind of existing T font three-phase four-wire system combining inverter (N line is received in combining inverter and is mainly used for sampling), it exchanges outlet side and connects R, S, T three-phase electricity through switch S 1, S2, S3 respectively, wherein, the corresponding three level brachium pontis be made up of switching tube Q1 ~ Q4 of R, the three level brachium pontis that S-phase correspondence is made up of switching tube Q5 ~ Q8, the three level brachium pontis that T-phase correspondence is made up of switching tube Q9 ~ Q12.
Described T font three-phase four-wire system combining inverter is transformed into the method and 1 that two-phase synchronizing mode runs) partly in like manner, repeat no more herein.In addition also can be transformed into single-phase grid-connected mode by increase switching device to run, below, provide two kinds of feasible programs.
Scheme one, the present embodiment reach by being connected a switch S 4 between electrical network N line and the DC bus mid point O of described T font three-phase four-wire system combining inverter the object running on single-phase semi-bridge pattern, as shown in Figure 5.The mode running on single-phase semi-bridge pattern has multiple, is specifically described as follows:
1. S2, S3 is disconnected, closed S1, S4; Utilize the two level brachium pontis be made up of Q1 and Q4, operate in single-phase two level half-bridge inverter patterns; Rest switch pipe keeps closing;
2. S2, S3 is disconnected, closed S1, S4; Utilize the three level brachium pontis be made up of Q1 ~ Q4, operate in single-phase tri-level half-bridge inverter pattern; Rest switch pipe keeps closing;
Above-mentioned be only describe several typical minimizing S, T-phase operational mode remodeling method, reduce S, R phase or reduce R, T-phase operational mode remodeling method in like manner, repeat no longer one by one herein.
Scheme two, the present embodiment also can increase a switch S 5 by exporting between (as T-phase) with a wherein phase of described T font three-phase four-wire system combining inverter at electrical network N line, reach the object running on single-phase two brachium pontis patterns, as shown in Figure 6.There are multiple single-phase two brachium pontis operational modes, are specifically described as follows:
1. S2, S3 is disconnected, closed S1, S5; Utilize the two level brachium pontis be made up of Q1, Q4 and the two level brachium pontis be made up of Q9, Q12, operate in single-phase two Level Full Bridge inverter patterns; Rest switch pipe keeps closing;
2. S2, S3 is disconnected, closed S1, S5; Utilize the three level brachium pontis be made up of Q1 ~ Q4 and the two level brachium pontis be made up of Q9, Q12, operate in single-phase asymmetric three-level inverter pattern; Rest switch pipe keeps closing.
Above-mentioned 1) be-2) only that the operational mode remodeling method of T font three-phase three-wire system combining inverter and T font three-phase four-wire system combining inverter is illustrated, three-phase three-wire system/three-phase four-wire system the combining inverter of other types can reach to reduce the operational mode transformation run for the purpose of the number of phases according to scheme described in the present embodiment equally, principle is identical, repeats no longer one by one herein.
Seen from the above description, the embodiment of the present invention is by when the current power output of three-phase inverter being detected lower than setting threshold, reduce the operation number of phases of three-phase inverter, to eliminate the power loss of the cut control circuit gone up mutually, power device, output filter circuit etc., meanwhile, electric current in all the other phases starts rising, power efficiency starts corresponding increase, thus improve the efficiency of energy utilization of whole three-phase inverter when light running, solve prior art Problems existing.
In addition, based on above-mentioned disclosed technical scheme, the invention discloses another three-phase converter method, see Fig. 7, comprising:
Step S101: obtain the power output P that three-phase inverter is current;
Step S102: judge that whether the current power output P of three-phase inverter is lower than setting threshold P
0if, P < P
0, enter step S103; Otherwise, return step S101;
Step S103: judge that the current power output P of three-phase inverter is lower than setting threshold P
0whether the duration T of this state exceeds setting duration T
0if, T > T
0, step S104; Otherwise, return step S101;
Step S104: the operation number of phases reducing three-phase inverter.
The technical program is detecting that the current power output P of three-phase inverter is lower than setting threshold P
0, and duration T exceeds setting duration T
0time (as 5 minutes), just reduce the operation number of phases of three-phase inverter.Compared to preceding solution, the misoperation that chugging causes can be avoided.
In addition, the embodiment of the invention also discloses a kind of three-phase inverter, to improve the efficiency of energy utilization of three-phase inverter when underloading, see Fig. 8, the control unit 200 comprising main circuit 100 and be connected with main circuit 100, wherein, control unit 200 comprises:
Acquiring unit 201, for obtaining the current power output of main circuit 100;
First judging unit 202, for judging that whether the current power output of main circuit 100 is lower than setting threshold;
And processing unit 203, for when judging to obtain the current power output of main circuit 100 lower than described setting threshold, reduce the operation number of phases of main circuit 100.
Optionally, see Fig. 9, control unit 200 also comprises the second judging unit 204;
Second judging unit 204, for judging whether the current power output of main circuit 100 exceeds setting duration lower than the duration of described this state of setting threshold;
Accordingly, processing unit 203, for judge to obtain the current power output of main circuit 100 lower than described setting threshold and the described duration exceeds described setting duration time, reduce the operation number of phases of main circuit 100.
Wherein, when main circuit 100 adopts the grid-connected mode of connection of three-phase three-wire system, processing unit 203 runs by main circuit 100 being transform as two-phase synchronizing mode the object realizing the operation number of phases reducing main circuit 100.
Wherein, when main circuit 100 adopts the grid-connected mode of connection of three-phase four-wire system, processing unit 203 is by transforming two-phase synchronizing mode as and run or single-phase grid-connected mode running the object realizing the operation number of phases reducing main circuit 100 by main circuit 100.Wherein, processing unit 203 realizes main circuit 100 to transform as by main circuit 100 being transform as single-phase semi-bridge mode operation or single-phase two brachium pontis mode operations the object that single-phase grid-connected mode runs.
In sum, the present invention is by when the current power output of three-phase inverter being detected lower than setting threshold, reduce the operation number of phases of three-phase inverter, to eliminate the power loss of the cut control circuit gone up mutually, power device, output filter circuit etc., meanwhile, electric current in all the other phases starts rising, power efficiency starts corresponding increase, thus improves the efficiency of energy utilization of whole three-phase inverter when light running.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For three-phase inverter disclosed in embodiment, because it is corresponding with three-phase converter method disclosed in embodiment, so description is fairly simple, relevant part illustrates see method part.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the embodiment of the present invention, can realize in other embodiments.Therefore, the embodiment of the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a three-phase converter method, is characterized in that, comprising:
Obtain the power output that three-phase inverter is current;
Judge that whether the current power output of three-phase inverter is lower than setting threshold;
When judging to obtain the current power output of three-phase inverter lower than described setting threshold, reduce the operation number of phases of three-phase inverter.
2. three-phase converter method according to claim 1, is characterized in that, before the operation number of phases of described minimizing three-phase inverter, also comprises:
Judge that obtaining the current power output of three-phase inverter exceeds setting duration lower than duration of described this state of setting threshold.
3. three-phase converter method according to claim 1 and 2, it is characterized in that, when the grid-connected mode of connection of three-phase inverter employing three-phase three-wire system, the operation number of phases of described minimizing three-phase inverter, comprising: three-phase inverter is transform as two-phase synchronizing mode and run.
4. three-phase converter method according to claim 1 and 2, it is characterized in that, when the grid-connected mode of connection of three-phase inverter employing three-phase four-wire system, the operation number of phases of described minimizing three-phase inverter, comprise: three-phase inverter is transform as two-phase synchronizing mode and run, or, three-phase inverter is transform as single-phase grid-connected mode and runs.
5. three-phase converter method according to claim 4, is characterized in that, describedly three-phase inverter is transform as single-phase grid-connected mode and runs, and comprising: three-phase inverter is transform as single-phase semi-bridge mode operation or single-phase two brachium pontis mode operations.
6. a three-phase inverter, is characterized in that, the control unit comprising main circuit and be connected with main circuit, and wherein, described control unit comprises:
Acquiring unit, for obtaining the current power output of main circuit;
First judging unit, for judging that whether the current power output of main circuit is lower than setting threshold;
And processing unit, for when judging to obtain the current power output of main circuit lower than described setting threshold, reduce the operation number of phases of main circuit.
7. three-phase inverter according to claim 6, is characterized in that, described control unit also comprises the second judging unit;
Described second judging unit, for judging whether the current power output of main circuit exceeds setting duration lower than the duration of described this state of setting threshold;
Accordingly, described processing unit, for judge to obtain the current power output of main circuit lower than described setting threshold and the described duration exceeds described setting duration time, reduce the operation number of phases of main circuit.
8. the three-phase inverter according to claim 6 or 7, it is characterized in that, when the grid-connected mode of connection of main circuit employing three-phase three-wire system, described processing unit runs by main circuit being transform as two-phase synchronizing mode the object realizing the operation number of phases reducing main circuit.
9. the three-phase inverter according to claim 6 or 7, it is characterized in that, when main circuit adopts the grid-connected mode of connection of three-phase four-wire system, described processing unit is by transforming two-phase synchronizing mode as and run or single-phase grid-connected mode running the object realizing the operation number of phases reducing main circuit by main circuit.
10. three-phase inverter according to claim 9, is characterized in that, described processing unit realizes main circuit to transform as by main circuit being transform as single-phase semi-bridge mode operation or single-phase two brachium pontis mode operations the object that single-phase grid-connected mode runs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510481521.8A CN104980057A (en) | 2015-08-03 | 2015-08-03 | Three-phase inverter and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510481521.8A CN104980057A (en) | 2015-08-03 | 2015-08-03 | Three-phase inverter and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104980057A true CN104980057A (en) | 2015-10-14 |
Family
ID=54276233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510481521.8A Pending CN104980057A (en) | 2015-08-03 | 2015-08-03 | Three-phase inverter and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104980057A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743165A (en) * | 2016-03-18 | 2016-07-06 | 深圳市陆巡天下科技有限公司 | Control strategy of high-power rapid charging pile |
| CN108336920A (en) * | 2018-03-29 | 2018-07-27 | 阳光电源股份有限公司 | A kind of topological circuit of inverter, regulation and control method and photovoltaic generating system |
| CN111443253A (en) * | 2020-04-17 | 2020-07-24 | 福州大学 | Power electronic equipment soft fault diagnosis method and system based on conversion efficiency |
| CN114362562A (en) * | 2021-11-24 | 2022-04-15 | 漳州科华技术有限责任公司 | Control method of three-phase PFC circuit, terminal and storage medium |
| CN114710015A (en) * | 2022-06-06 | 2022-07-05 | 深圳鹏城新能科技有限公司 | Multi-output mode inverter and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412637A (en) * | 2013-08-12 | 2013-11-27 | 浪潮电子信息产业股份有限公司 | Energy-saving method of phase number variable CPU VR (Central Processing Unit Voltage Regulation) |
| CN103516242A (en) * | 2013-09-22 | 2014-01-15 | 中国船舶重工集团公司第七一〇研究所 | Three-level three-phase half-bridge inverter circuit |
| CN104124711A (en) * | 2014-08-12 | 2014-10-29 | 无锡上能新能源有限公司 | Solar photovoltaic power generation system |
| CN104467005A (en) * | 2014-01-02 | 2015-03-25 | 艾伏新能源科技(上海)股份有限公司 | T-type three-level three-phase four-bridge-arm grid-connected photovoltaic power generation system and control method thereof |
| CN104578878A (en) * | 2014-12-29 | 2015-04-29 | 武汉理工大学 | Control method of three-phase four-leg grid-connected inverter |
-
2015
- 2015-08-03 CN CN201510481521.8A patent/CN104980057A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412637A (en) * | 2013-08-12 | 2013-11-27 | 浪潮电子信息产业股份有限公司 | Energy-saving method of phase number variable CPU VR (Central Processing Unit Voltage Regulation) |
| CN103516242A (en) * | 2013-09-22 | 2014-01-15 | 中国船舶重工集团公司第七一〇研究所 | Three-level three-phase half-bridge inverter circuit |
| CN104467005A (en) * | 2014-01-02 | 2015-03-25 | 艾伏新能源科技(上海)股份有限公司 | T-type three-level three-phase four-bridge-arm grid-connected photovoltaic power generation system and control method thereof |
| CN104124711A (en) * | 2014-08-12 | 2014-10-29 | 无锡上能新能源有限公司 | Solar photovoltaic power generation system |
| CN104578878A (en) * | 2014-12-29 | 2015-04-29 | 武汉理工大学 | Control method of three-phase four-leg grid-connected inverter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743165A (en) * | 2016-03-18 | 2016-07-06 | 深圳市陆巡天下科技有限公司 | Control strategy of high-power rapid charging pile |
| CN108336920A (en) * | 2018-03-29 | 2018-07-27 | 阳光电源股份有限公司 | A kind of topological circuit of inverter, regulation and control method and photovoltaic generating system |
| CN111443253A (en) * | 2020-04-17 | 2020-07-24 | 福州大学 | Power electronic equipment soft fault diagnosis method and system based on conversion efficiency |
| CN111443253B (en) * | 2020-04-17 | 2021-07-23 | 福州大学 | Power electronic equipment soft fault diagnosis method and system based on conversion efficiency |
| CN114362562A (en) * | 2021-11-24 | 2022-04-15 | 漳州科华技术有限责任公司 | Control method of three-phase PFC circuit, terminal and storage medium |
| CN114710015A (en) * | 2022-06-06 | 2022-07-05 | 深圳鹏城新能科技有限公司 | Multi-output mode inverter and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104980057A (en) | Three-phase inverter and control method thereof | |
| TW201639266A (en) | Power supply system and power conversion device | |
| EP3306635B1 (en) | Dc current breaker device | |
| CN105811771B (en) | A kind of determination method based on the loss of MMC isolated form DC/DC converter switches | |
| CN205725513U (en) | A kind of single-phase AC DC/DC AC double-purpose circuit and three-phase AC DC/DC AC double-purpose circuit | |
| CN104242720A (en) | Modular multilevel converter (MMC) of alternating current side cascading H-bridge | |
| CN105122624A (en) | Converter cell with reduced power losses, high voltage multilevel converter and associated method | |
| CN102739101A (en) | Forward-flyback inverter | |
| WO2022073319A1 (en) | Inverter circuit for realizing single-phase power efficient control of single-phase three-wire power source | |
| CN204206015U (en) | The mixing module combination multi-level converter of AC cascaded H-bridges | |
| CN205847123U (en) | A kind of three-phase T-shaped five-electrical level inverter circuit | |
| CN102739087A (en) | Synchronous follow current inverter topology without common-mode interference | |
| CN103107728A (en) | Voltage and current mixed source type grid-connected inverter topology | |
| CN103326606A (en) | One-phase five-level inverter | |
| CN103888010A (en) | High-frequency isolated type three-level inverter based on push-pull converter | |
| CN104638688A (en) | Single-phase uninterrupted power supply circuit and three-phase uninterrupted power supply circuit | |
| CN104410307A (en) | Working mode switching method and device for five-level inverter | |
| CN104716855A (en) | Current-type quasi-impedance source inverter with two-way power flow | |
| CN105099248B (en) | Dual input single-phase inverter | |
| CN103888013B (en) | The Miniature inverter theoretical based on high-frequency ac blood pressure lowering and numerical control device thereof | |
| CN105048852A (en) | Full-bridge Z-source inverter, control method thereof, and photovoltaic grid connected circuit | |
| CN105576813A (en) | Uninterrupted power source (UPS) and storage battery pack articulated circuit thereof | |
| WO2013010410A1 (en) | Solar power photovoltaic three-phase micro-inverter system and method for improving conversion efficiency thereof | |
| CN106887965B (en) | Control method, control device and the inverter of multi-electrical level inverter | |
| CN105162345B (en) | A kind of four electrical level DC-AC converters of direct-current micro-grid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151014 |
|
| RJ01 | Rejection of invention patent application after publication |