CN104242711A - Multi-level inverter - Google Patents
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- CN104242711A CN104242711A CN201410507789.XA CN201410507789A CN104242711A CN 104242711 A CN104242711 A CN 104242711A CN 201410507789 A CN201410507789 A CN 201410507789A CN 104242711 A CN104242711 A CN 104242711A
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Abstract
The invention relates to inverters, and provides a multi-level inverter. The multi-level inverter aims to solve problems of vulnerability of switch tubes of inverters in the prior art, low efficiency of power sources of the inverters, electromagnetic interference on DC ends and the like. The multi-level inverter comprises a direct-current energy generating device, an alternating-current energy generating device, a modulator circuit, an MCU (microprogrammed control unit) and an inverter circuit. The inverter circuit comprises a first switch module, a second switch module, a third switch module, a fourth switch module, a fifth switch module, a sixth switch module, a seventh switch module, an eighth switch module, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a first inductor, a second inductor and a voltage dividing module. The multi-level inverter has the advantages that switch tubes and the diodes are additionally arranged between bridge arms and at midpoints of bus capacitors, so that each two corresponding inductors can work simultaneously regardless of positive half cycles or negative half cycles, the utilization rate of the inductors can be increased, and the problem of DC electromagnetic interference can be solved. The invention is applicable to multi-level efficient inverters.
Description
Technical field
The present invention relates to inverter, particularly a kind of multi-electrical level inverter.
Background technology
Inverter is a kind of device for converting electric energy, and main realization is by the power conversion of direct current to interchange.Combining inverter comprises photovoltaic combining inverter, wind power grid-connected inverter, fuel cell combining inverter etc.The energy efficient that regenerative resource can produce by combining inverter can be converted to can and be connected to civil power with civil power same frequency, synchronous alternating current.
Divide by its circuit form: semi-bridge inversion power supply and full bridge inverse conversion power.Wherein the control mode of full bridge inverse conversion power has two kinds: Unipolar SPWM is modulated, and bipolar SPWM is modulated.Bipolar SPWM modulates two switching tube complementary drive of same brachium pontis, inconsistent due to the inconsistency of switching tube conducting, cut-off characteristics and the control circuit parameter of Dead Time, two switching tubes conducting simultaneously of same brachium pontis may be caused, and then cause switching tube to damage.Unipolar SPWM controls to be had: all only have a switching tube to make high frequency at civil power negative half period and switch, cause the utilance of outputting inductance to decline, and then reduce the efficiency of inverter power supply; The electromagnetic interference problem causing DC to hold of this kind of control mode is quite outstanding.
Summary of the invention
Technical problem to be solved by this invention, is just to provide a kind of multi-electrical level inverter, promotes inverter efficiency and the effect improving direct solenoid interference to reach.
The present invention solve the technical problem, and the technical scheme of employing is, a kind of multi-electrical level inverter comprises DC energy generation device, AC energy generation device, modulation circuit and MCU, also comprise inverter circuit, and described inverter circuit comprises, switch module one, switch module two, switch module three, switch module four, switch module five, switch module six, switch module seven, switch module eight, diode one, diode two, diode three, diode four, diode five, diode six, diode seven, diode eight, inductance one, inductance two and division module, the positive pole of described DC energy generation device respectively with division module, the input of switch module one, the input of switch module two, the negative electrode of the negative electrode of diode one and diode two connects, the output of switch module one respectively with one end of inductance one, the input of switch module three, the output of switch module five, the anode of the negative electrode of diode three and diode five connects, the output of switch module two respectively with one end of inductance two, the input of switch module four, the output of switch module seven, the anode of the negative electrode of diode four and diode seven connects, and the other end of inductance one is connected with the other end of inductance two by AC energy generation device, the input of switch module five respectively with the input of switch module six, the negative electrode of the negative electrode of diode five and diode six connects, the output of switch module six respectively with the anode of diode six, the output of switch module eight, the anode of diode eight and division module connect, division module also respectively with the negative pole of DC energy generation device, the output of switch module three, the output of switch module four, the anode of the anode of diode three and diode four connects, the input of switch module eight respectively with the input of switch module seven, the negative electrode of diode eight and the negative electrode of diode seven connect, the control end of described switch module one, the control end of switch module two, the control end of switch module three, the control end of switch module four is connected with MCU respectively by modulation circuit, the control end of switch module five, the control end of switch module six, the control end of switch module seven and the control end of switch module eight are connected with MCU,
Described modulation circuit, high-frequency pulse signal and sinusoidal signal modulation for being exported by MCU become to be used for the switch module one, switch module two, switch module three and switch module four high frequency trigger signal that drive; By the AC power same frequency of described sinusoidal signal and described AC energy generation device and same-phase;
Described MCU, for the operating state of control switch module one, switch module two, switch module three, switch module four, switch module five, switch module six, switch module seven and switch module eight;
Described division module, for reducing the input ripple of inverter link, also for bus dividing potential drop.
Concrete, described division module comprises electric capacity one and electric capacity two, the positive pole of described electric capacity one is connected with the positive pole of DC energy generation device, the negative pole of electric capacity one is connected with the anode of electric capacity two and the input of switch module six respectively, and the negative pole of electric capacity two is connected with the negative pole of DC energy generation device.
Further, described electric capacity one and electric capacity two are respectively bus capacitor.
Concrete, described inductance one and inductance two are filter inductance.
Concrete, described DC energy generation device is that sun can cell panel, wind energy battery or fuel cell.
The invention has the beneficial effects as follows, in the middle of each brachium pontis, add two switching tubes and two diodes with bus capacitor mid point, make no matter at positive half cycle or negative half period, two inductance work simultaneously, while raising inductance utilance, improve the electromagnetic interference problem of DC;
Due to the introducing of current following device, make energy storage device not participate in afterflow process, the current potential that a, b are 2 in afterflow process current potential keep substantially equal, and inverter mode and freewheeling state a, b 2 potential change amounts less, this reduces DC electromagnetic interference problem;
Three switching tubes that inverter in the present invention adopts all are made high frequency and are switched, this makes no matter in positive-negative half-cycle, the current potential of the interior side terminal of two filter inductances L1, L2 is all high-frequency impulse, and its outer side terminal is civil power, which increases the utilance of filter inductance;
The circuit that the present invention introduces, can realize five level modes, two filter inductances L1, L2 can reduce, and improve overall efficiency; Meanwhile, the voltage due to main switch high frequency conversion is the half of Vdc, and the switching loss of main switch reduces, and then also improves overall efficiency;
Relative to traditional inverter circuit structure, this circuit improves the utilance of inductance, decreases free wheeling path, improves overall efficiency, reduces the DC electromagnetic interference problem of machine simultaneously, make the various aspects performance boost of inverter.
Accompanying drawing explanation
Fig. 1 is the efficient inverter structural representation in a kind of multi-electrical level inverter example of the present invention;
Oscillogram when Fig. 2 is the efficient inverter work in a kind of multi-electrical level inverter of the present invention example on each parts;
Fig. 3 is efficient inverter in a kind of multi-electrical level inverter of the present invention example current circuit one schematic diagram when exporting positive half cycle alternating current;
Fig. 4 is efficient inverter in a kind of multi-electrical level inverter of the present invention example current circuit two schematic diagram when exporting positive half cycle alternating current;
Fig. 5 is efficient inverter in a kind of multi-electrical level inverter of the present invention example current circuit three schematic diagram when exporting positive half cycle alternating current;
Fig. 6 is efficient inverter in a kind of multi-electrical level inverter of the present invention example continuous current circuit schematic diagram when exporting positive half cycle alternating current;
Current circuit one schematic diagram when Fig. 7 is the efficient inverter output negative half period alternating current in a kind of multi-electrical level inverter example of the present invention;
Current circuit two schematic diagram when Fig. 8 is the efficient inverter output negative half period alternating current in a kind of multi-electrical level inverter example of the present invention;
Current circuit three schematic diagram when Fig. 9 is the efficient inverter output negative half period alternating current in a kind of multi-electrical level inverter example of the present invention;
Continuous current circuit schematic diagram when Figure 10 is the efficient inverter output negative half period alternating current in a kind of multi-electrical level inverter example of the present invention;
Wherein, DC energy generation device-Vdc, AC energy generation device--Vac, switch module one--S1, switch module two--S2, switch module three--S3, switch module four--S4, switch module five--S5, switch module six--S6, switch module seven--S7, switch module eight--S8, diode one--D1, diode two--D2, diode three--D3, diode four--D4, diode five--D5, diode six--D6, diode seven--D7, diode eight--D8, inductance one--L1, inductance two--L2, electric capacity one--C1 and electric capacity two--C2.
Embodiment
Technical scheme of the present invention is described in detail below in conjunction with drawings and Examples:
The present invention is directed in prior art, bipolar SPWM modulates two switching tube complementary drive of same brachium pontis, inconsistent due to the inconsistency of switching tube conducting, cut-off characteristics and the control circuit parameter of Dead Time, two switching tubes conducting simultaneously of same brachium pontis may be caused, and then cause switching tube to damage, and Unipolar SPWM control has, all only have a switching tube to make high frequency at civil power negative half period to switch, the utilance of outputting inductance is caused to decline, and then reduce the efficiency of inverter power supply, the suitable distinct issues of the electromagnetic interference problem causing DC to hold, a kind of multi-electrical level inverter is provided, comprises DC energy generation device, AC energy generation device, modulation circuit and MCU, also comprise inverter circuit, and described inverter circuit comprises, switch module one, switch module two, switch module three, switch module four, switch module five, switch module six, switch module seven, switch module eight, diode one, diode two, diode three, diode four, diode five, diode six, diode seven, diode eight, inductance one, inductance two and division module, the positive pole of described DC energy generation device respectively with division module, the input of switch module one, the input of switch module two, the negative electrode of the negative electrode of diode one and diode two connects, the output of switch module one respectively with one end of inductance one, the input of switch module three, the output of switch module five, the anode of the negative electrode of diode three and diode five connects, the output of switch module two respectively with one end of inductance two, the input of switch module four, the output of switch module seven, the anode of the negative electrode of diode four and diode seven connects, and the other end of inductance one is connected with the other end of inductance two by AC energy generation device, the input of switch module five respectively with the input of switch module six, the negative electrode of the negative electrode of diode five and diode six connects, the output of switch module six respectively with the anode of diode six, the output of switch module eight, the anode of diode eight and division module connect, division module also respectively with the negative pole of DC energy generation device, the output of switch module three, the output of switch module four, the anode of the anode of diode three and diode four connects, the input of switch module eight respectively with the input of switch module seven, the negative electrode of diode eight and the negative electrode of diode seven connect, the control end of described switch module one, the control end of switch module two, the control end of switch module three, the control end of switch module four is connected with MCU respectively by modulation circuit, the control end of switch module five, the control end of switch module six, the control end of switch module seven and the control end of switch module eight are connected with MCU, described modulation circuit, high-frequency pulse signal and sinusoidal signal modulation for being exported by MCU become to be used for the switch module one, switch module two, switch module three and switch module four high frequency trigger signal that drive, by the AC power same frequency of described sinusoidal signal and described AC energy generation device and same-phase, described MCU, for the operating state of control switch module one, switch module two, switch module three, switch module four, switch module five, switch module six, switch module seven and switch module eight, described division module, for reducing the input ripple of inverter link, also for bus dividing potential drop.In the middle of each brachium pontis, add two switching tubes and two diodes with bus capacitor mid point, make no matter at positive half cycle or negative half period, two inductance work simultaneously, while raising inductance utilance, improve the electromagnetic interference problem of DC; Due to the introducing of current following device, make energy storage device not participate in afterflow process, the current potential that a, b are 2 in afterflow process current potential keep substantially equal, and inverter mode and freewheeling state a, b 2 potential change amounts less, this reduces DC electromagnetic interference problem; Three switching tubes that inverter in the present invention adopts all are made high frequency and are switched, this makes no matter in positive-negative half-cycle, the current potential of the interior side terminal of two filter inductances L1, L2 is all high-frequency impulse, and its outer side terminal is civil power, which increases the utilance of filter inductance; The circuit that the present invention introduces, can realize five level modes, two filter inductances L1, L2 can reduce, and improve overall efficiency; Meanwhile, the voltage due to main switch high frequency conversion is the half of Vdc, and the switching loss of main switch reduces, and then also improves overall efficiency; Relative to traditional inverter circuit structure, this circuit improves the utilance of inductance, decreases free wheeling path, improves overall efficiency, reduces the DC electromagnetic interference problem of machine simultaneously, make the various aspects performance boost of inverter.
Embodiment 1
A kind of multi-electrical level inverter of this example, as shown in Figure 1, comprises DC energy generation device Vdc, AC energy generation device Vac, modulation circuit and MCU (not providing in figure), also comprise inverter circuit, described inverter circuit comprises, switch module one S1, switch module two S2, switch module Three S's 3, switch module four S4, switch module six S6, switch module five S5, switch module eight S8, switch module seven S7, diode one D1, diode two D2, diode three D3, diode four D4, diode six D6, diode five D5, diode eight D8, diode seven D7, inductance one L1, inductance two L2, the positive pole of electric capacity one C1 and electric capacity two C2, described DC energy generation device Vdc respectively with the positive pole of electric capacity one C1, the input of switch module one S1, the input of switch module two S2, the negative electrode of the negative electrode of diode one D1 and diode two D2 connects, the output of switch module one S1 respectively with one end of inductance one L1, the input of switch module Three S's 3, the output of switch module five S5, the anode of the negative electrode of diode three D3 and diode five D5 connects, the output of switch module two S2 respectively with one end of inductance two L2, the input of switch module four S4, the output of switch module seven S7, the anode of the negative electrode of diode four D4 and diode seven D7 connects, and the other end of inductance one L1 is connected with the other end of inductance two L2 by AC energy generation device Vac, the input of switch module five S5 respectively with the input of switch module six S6, the negative electrode of the negative electrode of diode five D5 and diode six D6 connects, the output of switch module six S6 respectively with the anode of diode six D6, the output of switch module eight S8, the anode of diode eight D8, the positive pole of the negative pole positive pole of electric capacity one C1 and electric capacity two C2 connects, the negative pole of electric capacity two C2 also respectively with the negative pole of DC energy generation device Vdc, the output of switch module Three S's 3, the output of switch module four S4, the anode of the anode of diode three D3 and diode four D4 connects, the input of switch module eight S8 respectively with the input of switch module seven S7, the negative electrode of diode eight D8 and the negative electrode of diode seven D7 connect, the control end of described switch module one S1, the control end of switch module two S2, the control end of switch module Three S's 3, the control end of switch module four S4 is connected with MCU respectively by modulation circuit, the control end of switch module five S5, the control end of switch module six S6, the control end of switch module seven S7 and the control end of switch module eight S8 are connected with MCU,
Described modulation circuit, switch module one S1, switch module two S2 that high-frequency pulse signal and sinusoidal signal modulation for being exported by MCU become to be used for drive, switch module Three S's 3 and switch module four S4 high frequency trigger signal; By the AC power same frequency of described sinusoidal signal and described AC energy generation device Vac and same-phase;
Described MCU, for the operating state of control switch module one S1, switch module two S2, switch module Three S's 3, switch module four S4, switch module five S5, switch module six S6, switch module seven S7 and switch module eight S8;
Described division module, for reducing the input ripple of inverter link, also for bus dividing potential drop.
Wherein, the control end of switch module one S1, switch module two S2, switch module Three S's 3, switch module four S4 respectively through first, second, third of modulation circuit and MCU and the 4th pulse signal output end be connected; Described switch module five S5, switch module six S6, switch module seven S7 and switch module eight S8 are connected with the pulse signal output end of MCU respectively.
The positive and negative electrode two ends of described DC energy generation device Vdc are provided with filtering bus capacitor above, i.e. electric capacity one C1 and electric capacity two C2, for reducing input ripple and the bus dividing potential drop of inverter link.DC energy generation device Vdc can be solar panel, wind energy or fuel cell etc.Inductance one L1 and inductance two L2 is filter inductance.
Oscillogram during above-mentioned efficient inverter work on each parts, as shown in Figure 2.
Embodiment 2
When a kind of multi-electrical level inverter in embodiment 1 works:
When exporting as positive half cycle, MCU control switch module five S5 and switch module eight S8 is open-minded at whole positive half cycle, make switch module two S2, switch module Three S's 3 switch module six S6 and switch module seven S7 end simultaneously, and make switch module one S1 and switch module four S4 in HF switch work, thus make the positive half cycle of output AC power source outside inductance one L1 and inductance two L2.
When exporting as negative half period, MCU control switch module six S6 and switch module seven S7 is open-minded at whole negative half period, make switch module one S1, switch module four S4, switch module five S5 and switch module eight S8 end simultaneously, and make switch module two S2 and switch module Three S's 3 and in HF switch work, make the negative half period of output AC power source outside inductance one L1 and inductance two L2; So go round and begin again.
Produce between positive half period at the AC energy generation device Vac of the outboard end of described inductance one L1 and inductance two L2, switch module five S5 and switch module eight S8 is open-minded at whole positive half cycle.
When the high frequency trigger signal of switch module one S1 is high level, when the high frequency trigger signal of Simultaneous Switching module four S4 is low level, the negative pole of the positive pole of DC energy generation device Vdc, switch module one S1, inductance one L1, AC energy generation device Vac, inductance two L2, diode seven D7, switch module eight S8, electric capacity two C2 and DC energy generation device Vdc forms current circuit successively; Its current trend, as shown in Figure 3.
When the high frequency trigger signal of switch module one S1 and switch module four S4 is high level, switch module one S1 and switch module four S4 conducting, the positive pole of DC energy generation device Vdc, switch module one S1, inductance one L1, AC energy generation device Vac, inductance two L2, switch module four S4 and DC energy generation device Vdc negative pole form current circuit successively; Its current trend, as shown in Figure 4.
When the high frequency trigger signal of switch module one S1 is low level, when Simultaneous Switching module four S4 triggering signal is high level, DC energy generation device Vdc positive pole, electric capacity one C1, diode six D6, the negative pole of switch module five S5, inductance one L1, AC energy generation device Vac, inductance two L2, switch module four S4 and DC energy generation device Vdc forms current circuit; Its current trend, as shown in Figure 5.
When switch module one S1 and switch module four S4 switching tube high frequency trigger signal are all low level, diode six D6, switch module five S5, inductance one L1, AC energy generation device Vac, inductance two L2, diode seven D7 and switch module eight S8 form continuous current circuit successively; Its current trend, as shown in Figure 6.
Embodiment 3
Between the negative half-cycle of the outboard end AC energy generation device Vac of described inductance one L1 and inductance two L2, switch module six S6 and switch module seven S7 is open-minded at whole negative half period;
When the high frequency trigger signal of switch module two S2 is high level, when the high frequency trigger signal of Simultaneous Switching module Three S's 3 is low level, the positive pole of DC energy generation device Vdc, switch module two S2, inductance two L2, AC energy generation device Vac, inductance one L1, diode five D5, switch module six S6, electric capacity two C2 and DC energy generation device Vdc negative pole form current circuit successively, its current trend, as shown in Figure 7.
When the high frequency trigger signal of switch module two S2 and switch module Three S's 3 is high level, switch module two S2 and switch module Three S's 3 conducting, the positive pole of DC energy generation device Vdc, switch module two S2, inductance two L2, AC energy generation device Vac, inductance one L1, switch module Three S's 3 and DC energy generation device Vdc negative pole form current circuit successively, its current trend, as shown in Figure 8.
When the high frequency trigger signal of switch module two S2 is low level, when Simultaneous Switching module Three S's 3 triggering signal is high, DC energy generation device Vdc positive pole, electric capacity one C1, diode eight D8, the negative pole of switch module seven S7, inductance two L2, AC energy generation device Vac, inductance one L1, switch module Three S's 3 and DC energy generation device Vdc forms current circuit, its current trend, as shown in Figure 9.
When the high frequency trigger signal of switch module two S2 and switch module Three S's 3 is all low, diode eight D8, switch module seven S7, inductance two L2, AC energy generation device Vac, inductance one L1, diode five D5 and switch module six S6 form continuous current circuit successively; Its current trend, as shown in Figure 10.
In sum, a kind of multi-electrical level inverter of the present invention is adding two switching tubes and two diodes with bus capacitor mid point in the middle of each brachium pontis, make no matter at positive half cycle or negative half period, two inductance work simultaneously, while raising inductance utilance, improve the electromagnetic interference problem of DC; Due to the introducing of current following device, make energy storage device not participate in afterflow process, the current potential that a, b are 2 in afterflow process current potential keep substantially equal, and inverter mode and freewheeling state a, b 2 potential change amounts less, this reduces DC electromagnetic interference problem; Three switching tubes that inverter in the present invention adopts all are made high frequency and are switched, this makes no matter in positive-negative half-cycle, the current potential of the interior side terminal of two filter inductances L1, L2 is all high-frequency impulse, and its outer side terminal is civil power, which increases the utilance of filter inductance; The circuit that the present invention introduces, can realize five level modes, two filter inductances L1, L2 can reduce, and improve overall efficiency; Meanwhile, the voltage due to main switch high frequency conversion is the half of Vdc, and the switching loss of main switch reduces, and then also improves overall efficiency; Relative to traditional inverter circuit structure, this circuit improves the utilance of inductance, decreases free wheeling path, improves overall efficiency, reduces the DC electromagnetic interference problem of machine simultaneously, make the various aspects performance boost of inverter.
Claims (5)
1. a multi-electrical level inverter, comprises DC energy generation device (Vdc), AC energy generation device (Vac), modulation circuit and MCU, is characterized in that, also comprises inverter circuit, and described inverter circuit comprises, switch module one (S1), switch module two (S2), switch module three (S3), switch module four (S4), switch module six (S6), switch module five (S5), switch module eight (S8), switch module seven (S7), diode one (D1), diode two (D2), diode three (D3), diode four (D4), diode six (D6), diode five (D5), diode eight (D8), diode seven (D7), inductance one (L1), inductance two (L2) and division module, the positive pole of described DC energy generation device (Vdc) respectively with division module, the input of switch module one (S1), the input of switch module two (S2), the negative electrode of the negative electrode of diode one (D1) and diode two (D2) connects, the output of switch module one (S1) respectively with one end of inductance one (L1), the input of switch module three (S3), the output of switch module five (S5), the anode of the negative electrode of diode three (D3) and diode five (D5) connects, the output of switch module two (S2) respectively with one end of inductance two (L2), the input of switch module four (S4), the output of switch module seven (S7), the negative electrode of diode four (D4) and the anode of diode seven (D7) connect, the other end of inductance one (L1) is connected with the other end of inductance two (L2) by AC energy generation device (Vac), the input of switch module five (S5) respectively with the input of switch module six (S6), the negative electrode of the negative electrode of diode five (D5) and diode six (D6) connects, the output of switch module six (S6) respectively with the anode of diode six (D6), the output of switch module eight (S8), the anode of diode eight (D8) and division module connect, division module also respectively with the negative pole of DC energy generation device (Vdc), the output of switch module three (S3), the output of switch module four (S4), the anode of the anode of diode three (D3) and diode four (D4) connects, the input of switch module eight (S8) respectively with the input of switch module seven (S7), the negative electrode of diode eight (D8) and the negative electrode of diode seven (D7) connect, the control end of described switch module one (S1), the control end of switch module two (S2), the control end of switch module three (S3), the control end of switch module four (S4) is connected with MCU respectively by modulation circuit, the control end of switch module five (S5), the control end of switch module six (S6), the control end of switch module seven (S7) and the control end of switch module eight (S8) are connected with MCU,
Described modulation circuit, high-frequency pulse signal and sinusoidal signal modulation for being exported by MCU become to be used for the switch module one (S1), switch module two (S2), switch module three (S3) and switch module four (S4) high frequency trigger signal that drive; By the AC power same frequency of described sinusoidal signal and described AC energy generation device (Vac) and same-phase;
Described MCU, for the operating state of control switch module one (S1), switch module two (S2), switch module three (S3), switch module four (S4), switch module five (S5), switch module six (S6), switch module seven (S7) and switch module eight (S8);
Described division module, for reducing the input ripple of inverter link, also for bus dividing potential drop.
2. a kind of multi-electrical level inverter according to claim 1, it is characterized in that, described division module comprises electric capacity one (C1) and electric capacity two (C2), the positive pole of described electric capacity one (C1) is connected with the positive pole of DC energy generation device (Vdc), the negative pole of electric capacity one (C1) is connected with the anode of electric capacity two (C2) and the input of switch module six (S6) respectively, and the negative pole of electric capacity two (C2) is connected with the negative pole of DC energy generation device (Vdc).
3. a kind of multi-electrical level inverter according to claim 2, is characterized in that, described electric capacity one (C1) and electric capacity two (C2) are respectively bus capacitor.
4. a kind of multi-electrical level inverter according to claim 1, is characterized in that, described inductance one (L1) and inductance two (L2) are filter inductance.
5. a kind of multi-electrical level inverter according to claim 1, is characterized in that, described DC energy generation device (Vdc) is that sun can cell panel, wind energy battery or fuel cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410507789.XA CN104242711A (en) | 2014-09-28 | 2014-09-28 | Multi-level inverter |
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| CN201410507789.XA CN104242711A (en) | 2014-09-28 | 2014-09-28 | Multi-level inverter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167525A (en) * | 2018-11-02 | 2019-01-08 | 湖南大学 | A kind of novel non-isolated five-electrical level inverter |
| CN111541391A (en) * | 2020-05-15 | 2020-08-14 | 西安交通大学 | Cross double-PV-source input-stage-connected multi-level inverter circuit |
-
2014
- 2014-09-28 CN CN201410507789.XA patent/CN104242711A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167525A (en) * | 2018-11-02 | 2019-01-08 | 湖南大学 | A kind of novel non-isolated five-electrical level inverter |
| CN111541391A (en) * | 2020-05-15 | 2020-08-14 | 西安交通大学 | Cross double-PV-source input-stage-connected multi-level inverter circuit |
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Application publication date: 20141224 |
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