CN202309553U - Non-isolated photovoltaic grid-connected inverter - Google Patents
Non-isolated photovoltaic grid-connected inverter Download PDFInfo
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- CN202309553U CN202309553U CN2011204032412U CN201120403241U CN202309553U CN 202309553 U CN202309553 U CN 202309553U CN 2011204032412 U CN2011204032412 U CN 2011204032412U CN 201120403241 U CN201120403241 U CN 201120403241U CN 202309553 U CN202309553 U CN 202309553U
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The utility model provides an efficient, low-leakage-current non-isolated photovoltaic grid-connected inverter, which comprises a partial pressure capacitor branch (1), a clamp branch (2), a full-bridge basic unit (3) and a follow current branch (4). On the basis of a full-bridge circuit, two controllable switching tubes and partial pressure capacitors are added to form the bidirectional clamp branch, two controllable switching tubes are added to form a zero level follow current branch, and follow current return circuit potential has one second of battery voltage at a follow current stage by being matched with a switch sequence, so that leakage current of the non-isolated grid-connected inverter is removed, output current at a power transmission stage is ensured to only pass through the two switching tubes, and conduction loss is led to be the lowest.
Description
Technical field
The utility model relates to a kind of non-isolated grid-connected inverter, belongs to combining inverter topologies field.
Background technology
Advantage such as the non-isolation type photovoltaic combining inverter has the efficient height, volume is little, in light weight and cost is low.But because the cell panel existence of parasitic capacitance over the ground, time variant voltage acts on the parasitic capacitance when making the switch motion of combining inverter switching device to produce high frequency, and the leakage current that brings out thus possibly exceed allowed band.The generation of high-frequency leakage current can bring the increase of conduction and radiated interference, network access current harmonics and loss, even jeopardizes equipment and personal security.
The differential mode characteristic good of the full-bridge grid-connected inverter of Unipolar SPWM, the high and filter inductance current pulsation amount extensive concern that receives such as little like the input direct voltage utilance.But produced the common-mode voltage (its amplitude is an input direct voltage) of switching frequency pulsation simultaneously; Make and to add transformer isolation (low frequency or high frequency) in grid-connected application scenario; But the common-mode voltage of dither constitutes a threat to the dielectric strength of transformer, has further increased cost of manufacture.In order to remove the isolating transformer in the full-bridge grid-connected inverter of Unipolar SPWM, patent EP1369985A2 proposes the new continuous current circuit of (AC side) two-way gate-controlled switch set constructor of adding between the brachium pontis mid point of full-bridge circuit; Patent US 7411802B2 only introduces a HF switch at the battery side anode, can realize that equally afterflow stage solar cell end and electrical network break away from.But according to full-bridge circuit high frequency common mode equivalent model; In order to eliminate the high frequency common mode voltage that the Unipolar SPWM modulation produces; Must make the continuous current circuit current potential in afterflow stage be clamped at the half the of solar cell input voltage; Common-mode voltage is eliminated fully, and be not that cell panel and electrical network are broken away from.Patent CN101814856A (has accomplished substantive examination and has repaiied back; Issued for approval) on the basis of patent US 7411802B2, adds the clamp branch road and can the continuous current circuit current potential in afterflow stage be clamped at the half the of solar cell input voltage; Significantly reduce the switching frequency leakage current, single because the single-way switch of introducing has caused the leakage current positive-negative half-cycle not to journey, increased the burden of equalizing capacitance balancing circuitry; In addition; The same with patent US 7411802B2, at power delivery stage electric current three power tubes of need flowing through, increased conduction loss.
Summary of the invention
The purpose of the utility model is the defective that overcomes above-mentioned prior art, and a kind of non-isolated grid-connected inverter is provided.
For realizing above-mentioned purpose, the said non-isolated grid-connected inverter of the utility model can adopt following three kinds of technical schemes:
Technical scheme one:
A kind of non-isolated grid-connected inverter comprises dividing potential drop capacitive branch, clamp branch road, full-bridge elementary cell and afterflow branch road; The dividing potential drop capacitive branch is by the first dividing potential drop capacitor C
Dc1, the second dividing potential drop capacitor C
Dc2Form; The clamp branch road comprises the 7th power switch tube S
7, the 8th power switch tube S
8Form; The full-bridge elementary cell is by first power switch tube S
1, second power switch tube S
2, the 3rd power switch tube S
3, the 4th power switch tube S
4Form; Clamp props up route the 5th power switch tube S
5, the 6th power switch tube S
6Form.
The first dividing potential drop capacitor C wherein
Dc1Anode connect solar cell positive output end, first power switch tube S respectively
1With the 3rd power switch tube S
3Collector electrode; The first dividing potential drop capacitor C
Dc1Negative terminal connect the second dividing potential drop capacitor C respectively
Dc2Anode, the 8th power switch tube S
8Collector electrode; The second dividing potential drop capacitor C
Dc2Negative terminal connect solar cell negative output terminal, second power switch tube S respectively
2Emitter, the 4th power switch tube S
4Emitter.
First power switch tube S
1Emitter connect second power switch tube S respectively
2Collector electrode, the 5th power switch tube S
5Collector electrode and network access filter L
1An end.
The 3rd power switch tube S
3Emitter connect the 4th power switch tube S respectively
4Collector electrode, the 6th power switch tube S
6Collector electrode and network access filter L
2An end.
The 5th power switch tube S
5Emitter connect the 6th power switch tube S respectively
6Emitter, the 7th power switch tube S
7Collector electrode.
The 7th power switch tube S
7Emitter connect the 8th power switch tube S
8Emitter.
Technical scheme two:
A kind of non-isolated grid-connected inverter comprises dividing potential drop capacitive branch, clamp branch road, full-bridge elementary cell and afterflow branch road; The dividing potential drop capacitive branch is by the first dividing potential drop capacitor C
Dc1, the second dividing potential drop capacitor C
Dc2Form; The clamp branch road comprises the 7th power switch tube S
7, the 8th power switch tube S
8Form; The full-bridge elementary cell is by first power switch tube S
1, second power switch tube S
2, the 3rd power switch tube S
3, the 4th power switch tube S
4Form; Clamp props up route the 5th power switch tube S
5, the 6th power switch tube S
6Form.
The first dividing potential drop capacitor C wherein
Dc1Anode connect solar cell positive output end, first power switch tube S respectively
1With the 3rd power switch tube S
3Collector electrode; The first dividing potential drop capacitor C
Dc1Negative terminal connect the second dividing potential drop capacitor C respectively
Dc2Anode, the 8th power switch tube S
8Collector electrode; The second dividing potential drop capacitor C
Dc2Negative terminal connect solar cell negative output terminal, second power switch tube S respectively
2Emitter, the 4th power switch tube S
4Emitter.
First power switch tube S
1Emitter connect second power switch tube S respectively
2Collector electrode, the 5th power switch tube S
5Collector electrode, the 7th power switch tube S
7Collector electrode and network access filter L
1An end.
The 3rd power switch tube S
3Emitter connect the 4th power switch tube S respectively
4Collector electrode, the 6th power switch tube S
6Collector electrode and network access filter L
2An end.
The 5th power switch tube S
5Emitter connect the 6th power switch tube S respectively
6Emitter
The 7th power switch tube S
7Emitter connect the 8th power switch tube S
8Emitter.
Technical scheme three:
A kind of non-isolated grid-connected inverter comprises dividing potential drop capacitive branch, clamp branch road, full-bridge elementary cell and afterflow branch road; The dividing potential drop capacitive branch is by the first dividing potential drop capacitor C
Dc1, the second dividing potential drop capacitor C
Dc2Form; The clamp branch road comprises the 7th power switch tube S
7, the 8th power switch tube S
8Form; The full-bridge elementary cell is by first power switch tube S
1, second power switch tube S
2, the 3rd power switch tube S
3, the 4th power switch tube S
4Form; Clamp props up route the 5th power switch tube S
5, the 6th power switch tube S
6Form.
The first dividing potential drop capacitor C wherein
Dc1Anode connect solar cell positive output end, first power switch tube S respectively
1With the 3rd power switch tube S
3Collector electrode; The first dividing potential drop capacitor C
Dc1Negative terminal connect the second dividing potential drop capacitor C respectively
Dc2Anode, the 8th power switch tube S
8Collector electrode; The second dividing potential drop capacitor C
Dc2Negative terminal connect solar cell negative output terminal, second power switch tube S respectively
2Emitter, the 4th power switch tube S
4Emitter.
First power switch tube S
1Emitter connect second power switch tube S respectively
2Collector electrode, the 5th power switch tube S
5Collector electrode and network access filter L
1An end.
The 3rd power switch tube S
3Emitter connect the 4th power switch tube S respectively
4Collector electrode, the 6th power switch tube S
6Collector electrode, the 7th power switch tube S
7Collector electrode and network access filter L
2An end.
The 5th power switch tube S
5Emitter connect the 6th power switch tube S respectively
6Emitter.
The 7th power switch tube S
7Emitter connect the 8th power switch tube S
8Emitter.
Above-mentioned three kinds of non-isolated grid-connected inverters switch control time sequence originally is identical, and detailed process is following:
With first power switch tube S
1With the 4th power switch tube S
4By the action of Unipolar SPWM mode high frequency, negative half period turn-offs at the positive half cycle of network access electric current;
With second power switch tube S
2With the 3rd power switch tube S
3By the action of Unipolar SPWM mode high frequency, positive half cycle turn-offs at network access electric current negative half period;
With the 5th power switch tube S
5Open-minded at network access electric current negative half period, positive half cycle turn-offs;
With the 6th power switch tube S
6Open-minded at the positive half cycle of network access electric current, negative half period turn-offs;
With the 7th power switch tube S
7With the 8th power switch tube S
8The drive signal and first power switch tube S at the positive half cycle of network access electric current
1Drive signal complementary, and add Dead Time; The drive signal and second power switch tube S at network access electric current negative half period
2Drive signal complementary, and add Dead Time;
The utility model adds two controlled tr tubes at the brachium pontis outlet side on the basis of full-bridge circuit provide continuous current circuit and add two controlled tr tubes and dividing potential drop electric capacity formation two-way clamp branch road at DC side; Can realize afterflow during the stage continuous current circuit current potential be in 1/2nd cell voltage and suppress leakage current; And guaranteed power delivery stage output current two switching tubes of only flowing through, effectively reduce conduction loss.In addition, the adding of clamp branch road makes the voltage stress of the HF switch that the alternating current-direct current side is introduced be merely the half the of input cell voltage.
Description of drawings
Fig. 1 (a) is the circuit diagram of the utility model main circuit technical scheme one.
In the present technique scheme, be a termination of clamp branch road and the mid point of afterflow branch road.
The circuit diagram of Fig. 1 (b) the utility model main circuit technical scheme two.
In the present technique scheme, a termination of clamp branch road and afterflow branch road side.
Fig. 1 (c) is the circuit diagram of the utility model main circuit technical scheme three.
In the present technique scheme, a termination of clamp branch road and another side of afterflow branch road.
Fig. 2 is the driving signal of power switching tube sketch map of the utility model.
Fig. 3 (a)-(d) is the utility model clamp operation mode figure, wherein
Fig. 3 (a) is that continuous current circuit voltage reduces the operation mode figure of the positive half cycle of network access electric current;
Fig. 3 (b) is that continuous current circuit voltage raises the operation mode figure of the positive half cycle of network access electric current;
Fig. 3 (c) is that continuous current circuit voltage reduces the operation mode figure of network access electric current negative half period;
Fig. 3 (d) is that continuous current circuit voltage raises the operation mode figure of network access electric current negative half period.
Fig. 4 is inverter brachium pontis output voltage (differential mode voltage) and network access voltage, the current waveform figure of the utility model embodiment.
Fig. 5 (a) is common-mode voltage waveform and the spectrogram of the utility model embodiment.
Fig. 5 (b) is leakage current waveform and the spectrogram of the utility model embodiment.
The main symbol of above-mentioned accompanying drawing and label title: C
Dc1, C
Dc2---dividing potential drop electric capacity; S
1～S
8---power switch pipe; Grid, u
g---line voltage; U
Pv---the solar panel output voltage; L
1, L
2---the network access filter inductance; C
1---the network access filter capacitor; i
g---the network access electric current; u
1N---1 pair of battery negative terminal voltage of inverter bridge mid point; u
2N---2 pairs of battery negative terminal voltages of inverter bridge mid point; i
Leakage---leakage current.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to the utility model:
Fig. 1 (a)-(c) has described three kinds of constituted modes of the main circuit of the utility model, by the first dividing potential drop capacitor C
Dc1With the second dividing potential drop capacitor C
Dc2Be composed in series elementary cell 1; By first power switch tube S
1, second power switch tube S
2, the 3rd power switch tube S
3With the 4th power switch tube S
4Form elementary cell 3; By the 5th power switch tube S
5, the 6th power switch tube S
6Form elementary cell 4; By the 7th power switch tube S
7, the 8th power switch tube S
8Form elementary cell 2; Elementary cell 2 constitutes three kinds of circuit structures with three kinds of on-link mode (OLM)s of elementary cell 3.
Fig. 2 is the drive signal sequential chart of the utility model main circuit power switch pipe, first power switch tube S
1With the 4th power switch tube S
4, close by the action of Unipolar SPWM mode high frequency at the positive half cycle of network access electric current at network access electric current negative half period; Second power switch tube S
2With the 3rd power switch tube S
3, close by the action of Unipolar SPWM mode high frequency at network access electric current negative half period at the positive half cycle of network access electric current; The 5th power switch tube S
5Drive signal straight-through at network access electric current negative half period, close at the positive half cycle of network access electric current; The 6th power switch tube S
6Drive signal straight-through at the positive half cycle of network access electric current, close at network access electric current negative half period; The 7th power switch tube S
7With the 8th power switch tube S
8Drive signal in the positive half cycle of network access electric current and first power switch tube S
1Drive signal complementary, and add Dead Time, in the network access electric current negative half period and second power switch tube S
2Drive signal complementary, and add Dead Time; In order to guarantee the complete clamp of continuous current circuit, zero passage stage the 5th power switch tube S
5, the 6th power switch tube S
6, the 7th power switch tube S
7With the 8th power switch tube S
8Need conducting.
Equivalent electric circuit when Fig. 3 (a)-(d) works for the converter clamp.Network access sense of current no matter is as long as the continuous current circuit current potential reduces the 8th power switch tube S
8With the 7th power switch tube S
7Anti-and diode or parasitic diode conducting, continuous current circuit is clamped at
As long as the continuous current circuit current potential raises, the 7th power switch tube S
7With the 8th power switch tube S
8Anti-and diode or parasitic diode conducting conducting, equally continuous current circuit is clamped at
Level.
An instantiation of the utility model is following: cell plate voltage U
Pv=400V, line voltage U
Grid=220VRMS, mains frequency f
Grid=50Hz, rated power P
N=2kW; Dc-link capacitance C
Dc1=C
Dc2=470 μ F; Filter inductance L
1=L
2=2mH; Filter capacitor C
1=6 μ F; Cell panel is parasitic capacitance C over the ground
Pv1=C
Pv2=0.15 μ F; Switch lock f=20kHZ.
Accompanying drawing 4～5 is the concrete experimental waveform figure of this instance, and as can be seen from Figure 4, the brachium pontis output voltage of combining inverter is the Unipolar SPWM waveform, has realized good differential mode characteristic, can reduce the filter inductance size and improve conversion efficiency.
The common-mode voltage that from accompanying drawing 5 (a), can find out the output of inverter brachium pontis is except having in switching dead time the pulse voltage; The effective clamp of Duan Jun quilt is to steady state value At All Other Times; Significantly reduce the pulsation energy of common-mode voltage, helped reducing the amplitude of common mode leakage current; Accompanying drawing 5 (b) has quantized to prove that from experimental viewpoint the amplitude of electric leakage is big or small, is lower than the limit value (less than 20mA) of standard DIN VDE 0126-1-1-2006.
Claims (3)
1. a non-isolated grid-connected inverter is characterized in that: comprise dividing potential drop capacitive branch (1), clamp branch road (2), full-bridge elementary cell (3) and afterflow branch road (4); Dividing potential drop capacitive branch (1) is by the first dividing potential drop electric capacity (C
Dc1), the second dividing potential drop electric capacity (C
Dc2) form; Clamp branch road (2) is by the 7th power switch pipe (S
7), the 8th power switch pipe (S
8) form; Full-bridge elementary cell (3) is by the first power switch pipe (S
1), the second power switch pipe (S
2), the 3rd power switch pipe (S
3), the 4th power switch pipe (S
4) form; Clamp branch road (4) is by the 5th power switch pipe (S
5), the 6th power switch pipe (S
6) form;
The above-mentioned first dividing potential drop electric capacity (C
Dc1) anode connect solar cell positive output end, the first power switch pipe (S respectively
1) and the 3rd power switch pipe (S
3) collector electrode; The first dividing potential drop electric capacity (C
Dc1) negative terminal connect the second dividing potential drop electric capacity (C respectively
Dc2) anode, the 8th power switch pipe (S
8) collector electrode; The second dividing potential drop electric capacity (C
Dc2) negative terminal connect solar cell negative output terminal, the second power switch pipe (S respectively
2) emitter, the 4th power switch pipe (S
4) emitter;
The above-mentioned first power switch pipe (S
1) emitter connect the second power switch pipe (S respectively
2) collector electrode, the 5th power switch pipe (S
5) collector electrode and network access filter (
L 1) an end;
Above-mentioned the 3rd power switch pipe (S
3) emitter connect the 4th power switch pipe (S respectively
4) collector electrode, the 6th power switch pipe (S
6) collector electrode and network access filter (
L 2) an end;
Above-mentioned the 5th power switch pipe (S
5) emitter connect the 6th power switch pipe (S respectively
6) emitter, the 7th power switch pipe (S
7) collector electrode;
Above-mentioned the 7th power switch pipe (S
7) emitter connect the 8th power switch pipe (S
8) emitter.
2. a non-isolated grid-connected inverter is characterized in that: comprise dividing potential drop capacitive branch (1), clamp branch road (2), full-bridge elementary cell (3) and afterflow branch road (4); Dividing potential drop capacitive branch (1) is by the first dividing potential drop electric capacity (C
Dc1), the second dividing potential drop electric capacity (C
Dc2) form; Clamp branch road (2) is by the 7th power switch pipe (S
7), the 8th power switch pipe (S
8) form; Full-bridge elementary cell (3) is by the first power switch pipe (S
1), the second power switch pipe (S
2), the 3rd power switch pipe (S
3), the 4th power switch pipe (S
4) form; Clamp branch road (4) is by the 5th power switch pipe (S
5), the 6th power switch pipe (S
6) form;
The above-mentioned first dividing potential drop electric capacity (C
Dc1) anode connect solar cell positive output end, the first power switch pipe (S respectively
1) and the 3rd power switch pipe (S
3) collector electrode; The first dividing potential drop electric capacity (C
Dc1) negative terminal connect the second dividing potential drop electric capacity (C respectively
Dc2) anode, the 8th power switch pipe (S
8) collector electrode; The second dividing potential drop electric capacity (C
Dc2) negative terminal connect solar cell negative output terminal, the second power switch pipe (S respectively
2) emitter, the 4th power switch pipe (S
4) emitter;
The above-mentioned first power switch pipe (S
1) emitter connect the second power switch pipe (S respectively
2) collector electrode, the 5th power switch pipe (S
5) collector electrode, the 7th power switch pipe (S
7) collector electrode and network access filter (
L 1) an end;
The 3rd power switch pipe (S
3) emitter connect the 4th power switch pipe (S respectively
4) collector electrode, the 6th power switch pipe (S
6) collector electrode and network access filter (
L 2) an end;
The 5th power switch pipe (S
5) emitter connect the 6th power switch pipe (S respectively
6) emitter
The 7th power switch pipe (S
7) emitter connect the 8th power switch pipe (S
8) emitter.
3. a non-isolated grid-connected inverter is characterized in that: comprise dividing potential drop capacitive branch (1), clamp branch road (2), full-bridge elementary cell (3) and afterflow branch road (4); Dividing potential drop capacitive branch (1) is by the first dividing potential drop electric capacity (C
Dc1), the second dividing potential drop electric capacity (C
Dc2) form; Clamp branch road (2) is by the 7th power switch pipe (S
7), the 8th power switch pipe (S
8) form; Full-bridge elementary cell (3) is by the first power switch pipe (S
1), the second power switch pipe (S
2), the 3rd power switch pipe (S
3), the 4th power switch pipe (S
4) form; Clamp branch road (4) is by the 5th power switch pipe (S
5), the 6th power switch pipe (S
6) form;
The first dividing potential drop electric capacity (C wherein
Dc1) anode connect solar cell positive output end, the first power switch pipe (S respectively
1) and the 3rd power switch pipe (S
3) collector electrode; The first dividing potential drop electric capacity (C
Dc1) negative terminal connect the second dividing potential drop electric capacity (C respectively
Dc2) anode, the 8th power switch pipe (S
8) collector electrode; The second dividing potential drop electric capacity (C
Dc2) negative terminal connect solar cell negative output terminal, the second power switch pipe (S respectively
2) emitter, the 4th power switch pipe (S
4) emitter;
The above-mentioned first power switch pipe (S
1) emitter connect the second power switch pipe (S respectively
2) collector electrode, the 5th power switch pipe (S
5) collector electrode and network access filter (
L 1) an end;
Above-mentioned the 3rd power switch pipe (S
3) emitter connect the 4th power switch pipe (S respectively
4) collector electrode, the 6th power switch pipe (S
6) collector electrode, the 7th power switch pipe (S
7) collector electrode and network access filter (
L 2) an end;
Above-mentioned the 5th power switch pipe (S
5) emitter connect the 6th power switch pipe (S respectively
6) emitter;
The 7th power switch pipe (S
7) emitter connect the 8th power switch pipe (S
8) emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204032412U CN202309553U (en) | 2011-10-20 | 2011-10-20 | Non-isolated photovoltaic grid-connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204032412U CN202309553U (en) | 2011-10-20 | 2011-10-20 | Non-isolated photovoltaic grid-connected inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202309553U true CN202309553U (en) | 2012-07-04 |
Family
ID=46378363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204032412U Expired - Fee Related CN202309553U (en) | 2011-10-20 | 2011-10-20 | Non-isolated photovoltaic grid-connected inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202309553U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3029821A1 (en) * | 2013-08-02 | 2016-06-08 | Panasonic Intellectual Property Management Co., Ltd. | Semiconductor device and power conversion device |
-
2011
- 2011-10-20 CN CN2011204032412U patent/CN202309553U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3029821A1 (en) * | 2013-08-02 | 2016-06-08 | Panasonic Intellectual Property Management Co., Ltd. | Semiconductor device and power conversion device |
| EP3029821A4 (en) * | 2013-08-02 | 2017-05-10 | Panasonic Intellectual Property Management Co., Ltd. | Semiconductor device and power conversion device |
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