CN106169885B - A kind of switch of tandem type six multi-electrical level inverter - Google Patents
A kind of switch of tandem type six multi-electrical level inverter Download PDFInfo
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- CN106169885B CN106169885B CN201610554048.6A CN201610554048A CN106169885B CN 106169885 B CN106169885 B CN 106169885B CN 201610554048 A CN201610554048 A CN 201610554048A CN 106169885 B CN106169885 B CN 106169885B
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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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
A kind of switch of tandem type six multi-electrical level inverter, including the power cell being made of main switch group and switching capacity group, wherein main switch group is conventional full bridge structure, switching capacity group is made of a switching capacity, two power switch tubes and three uncontrollable diodes, and main switch group the first bridge arm midpoint and the second bridge arm midpoint are power cell output；By multiple power cells, successively concatenated in order is constituted inverter.Inverter of the invention, when realizing same level number output voltage, greatly reduces the quantity of device for power switching, reduces device complexity since each power cell can produce five level output voltages, has the characteristics that inversion efficiency is high, highly reliable.
Description
Technical field
The present invention relates to a kind of tandem types six to switch multi-electrical level inverter, belongs to inversion transformation technique field.
Background technique
Under mesohigh large capacity variable-frequency governor and the widely applied prospect of active power filter, multi-electrical level inverter
Have become the important research hot spot that current electric and electronic power transformation field is concerned.It has the advantage that output electricity
The total harmonic distortion of pressure is substantially reduced with the increase of level number；Under conditions of output phase homogenous quantities voltage waveform, switching loss
It is small, switching frequency is lower；Compared with two level current transformers, under the voltage class of phase, du/dt is obviously reduced, in high pressure great Rong
It measures in motor driven, rotor can be effectively prevent to wind insulation breakdown, while improving the emi characteristics of device.Therefore,
Before multi-electrical level inverter has good application in fields such as mesohigh AC speed regulating field, distributed power generation and flexible AC transmissions
Scape.
Current main multi-electrical level inverter includes that how electric diode clamping formula multi-electrical level inverter, the clamped formula of striding capacitance be
Flat inverter and Cascade H bridge type multi-electrical level inverter.When needing to realize higher voltage class and number of levels, diode is embedding
Catching diode device or clamped capacitor needed for position formula multi-electrical level inverter and the clamped formula multi-electrical level inverter of striding capacitance
Device count will sharply increase, and there is a problem of capacitor voltage balance control difficulty.And Cascade H bridge type multi-electrical level inverter
It is easier to realize biggish number of levels and voltage class, but with the increase of voltage class, Cascade H bridge type multi-electrical level is inverse
Becoming the cascade number of unit of device also will increase, and switching device quantity increases therewith.
With the continuous development and THE UPFC of the new energy power generation technologies such as wind power generation, photovoltaic power generation
(UPFC), the continuous demand of the power equipments such as active power filter in the power system, high efficiency and high quality output waveform
Inverter be increasingly taken seriously, therefore just come into being with the novel multi-electrical level inverter of switched-capacitor circuit.
Summary of the invention
The object of the present invention is to the shortcomings that being directed to traditional cascaded H-bridges multi-electrical level inverter, the present invention proposes a kind of cascade
Formula six switchs multi-electrical level inverter, uses and constitutes power cell using six switch five-power level inverters of switching capacity to simplify grade
Join inverter structure, reduces switching device number under identical output voltage grade to realize, improve inverter efficiency, save
System cost.
Realize that technical scheme is as follows: a kind of switch of tandem type six multi-electrical level inverter, by multiple power cells
Successively concatenated in order is constituted, and the power cell includes main switch group, switching capacity group and DC power supply；Previous power cell
Main switch group the second bridge arm midpoint is connected to form cascade with the first bridge arm of main switch group midpoint of latter power cell；It is cascade
The midpoint of the first bridge arm of main switch group of first power cell is inverter output plus terminal, the last one cascade power cell
The second bridge arm of main switch group midpoint be inverter output negative terminal.
The main switch group is conventional full bridge structure, by first switch tube, third switching tube, first diode and the three or two
Pole pipe forms the first bridge arm of main switch group；Master is formed by second switch, the 4th switching tube, the second diode and the 4th diode
The second bridge arm of switching group；The collector of the first switch tube is connected with the cathode of first diode and first node simultaneously,
The emitter of first switch tube is connected with the anode of first diode；The third switch pipe collector and third diode
Cathode is connected, and the emitter of third switching tube is connected with the anode of third diode and second node simultaneously；Described the one or two
The cathode of pole pipe is connected with the collector of second switch, and the anode of first diode is connected with the cathode of third diode；Institute
The anode for the third diode stated is connected with the emitter of the 4th switching tube；The collector of the second switch and the two or two
The cathode of pole pipe is connected, and the emitter of second switch is connected with the anode of the second diode；The collection of 4th switching tube
Electrode is connected with the cathode of the 4th diode, and the emitter of the 4th switching tube is connected with the anode of the 4th diode；Described
The anode of two diodes is connected with the cathode of the 4th diode；Main switch group the first bridge arm midpoint and the second bridge arm midpoint
Respectively power cell exports positive and negative terminal.
The switching capacity group is made of a switching capacity, two power switch tubes and three uncontrollable diodes, i.e.,
It is made of first capacitor, the 5th switching tube, the 6th switching tube, the 5th diode, the 6th diode and the 7th diode；Described
The anodes of seven diodes is connected with the collector of the 5th switching tube and the 5th node simultaneously, the cathode of the 7th diode while with the
The anode of one capacitor is connected with third node；The cathode of the first capacitor is opened with the emitter and the 6th of the 5th switching tube simultaneously
The emitter for closing pipe is connected；The collector of 5th switching tube is connected with the cathode of the 5th diode, the transmitting of the 5th switching tube
Pole is connected with the anode of the 5th diode；The emitter of 6th switching tube is connected with the anode of the 6th diode, and the 6th opens
Pipe collector is closed to be connected with the cathode of the 6th diode and fourth node simultaneously.
When switching capacity, that is, first capacitor of the switching capacity group is full of energy, on voltage and DC power supply thereon
Voltage is equal.
The effect of 7th diode of the switching capacity group is that the electric current in limitation switching capacity, that is, first capacitor is reversed
Flow to DC power supply.
The first node of the main switch group is connected with the third node of switching capacity group；The second node of main switch group with
The fourth node of switching capacity group is connected.
The DC power anode of the power cell is connected with the 5th node of switching capacity group, the cathode of DC power supply with
The fourth node of switching capacity group is connected.
The first switch tube, second switch, third switching tube, the 4th switching tube, the 5th switching tube and the 6th switch
Pipe is using any one in MOSFET pipe, PowerMosfet pipe, CoolMosfet pipe, IGBT pipe.
First anti-paralleled diode, the second anti-paralleled diode, third anti-paralleled diode, the 4th inverse parallel two
Pole pipe, the 5th anti-paralleled diode and the 6th anti-paralleled diode are two poles included inside separate diode or power switch tube
Pipe.
The invention has the advantages that the present invention provides a kind of tandem types six to switch multi-electrical level inverter, using use
The six switch five-power level inverters composition power cell of switching capacity, relatively traditional cascaded H-bridges inverter power unit, each
Power cell can produce six kinds of output voltage states, five kinds of output-voltage levels, and output voltage grade can also be improved one times.
Relative to the multi-electrical level inverter using conventional full bridge structure, the tandem type six, which switchs multi-electrical level inverter, to be reduced in system
Switch element number improves output waveform quality, effectively reduces harmonic content, alleviates the problems such as electromagnetic interference, in function
Rate size occasion can achieve the purpose that optimization system efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that tandem type six proposed by the present invention switchs multi-electrical level inverter；
Fig. 2 is the structural schematic diagram for the power cell that tandem type six switchs in multi-electrical level inverter；
Fig. 3 is the first voltage status schematic diagram of power cell shown in Fig. 2；
Fig. 4 is second of voltage status schematic diagram of power cell shown in Fig. 2；
Fig. 5 is the third voltage status schematic diagram of power cell shown in Fig. 2；
Fig. 6 is the 4th kind of voltage status schematic diagram of power cell shown in Fig. 2；
Fig. 7 is the 5th kind of voltage status schematic diagram of power cell shown in Fig. 2；
Fig. 8 is the 6th kind of voltage status schematic diagram of power cell shown in Fig. 2；
In figure, S1 is first switch tube；S2 is second switch；S3 is third switching tube；S4 is the 4th switching tube；S5 is
5th switching tube；S6 is the 6th switching tube；D1 is first diode；D2 is the second diode；D3 is third diode；D4 is
Four diodes；D5 is the 5th diode；D6 is the 6th diode；D7 is the 7th diode；C1 is first capacitor；E is direct current
Pressure；SC is switching capacity group；SW is main switching group.
Specific embodiment
A specific embodiment of the invention is as shown in the picture.
Fig. 1 show a kind of tandem type six of the present invention and switchs multi-electrical level inverter structural schematic diagram.The inverter is by N number of
Successively concatenated in order is constituted power cell；The master at main switch group the second bridge arm midpoint and latter power cell of previous power cell
The first bridge arm of switching group midpoint is connected to form cascade；The midpoint of the first bridge arm of main switch group of cascade first power cell
For inverter output plus terminal, the midpoint of the second bridge arm of main switch group of the last one cascade power cell is inverter output
Negative terminal.
Fig. 2 show a kind of a kind of embodiment party of the topological structure of the switch of tandem type six multi-electrical level inverter power cell
Formula.As shown in Fig. 2, the power cell is made of main switch group SW, switching capacity group SC and DC power supply.
The main switch group SW of the power cell of the present embodiment is conventional full bridge structure, is switched by first switch tube S1, third
The first bridge arm of pipe S3, first diode D1 and third diode D3 composition main switch group SW, are opened by second switch S2, the 4th
Close the second bridge arm of pipe S4, the second diode D2 and the 4th diode D4 composition main switch group SW.The first switch tube S1
Collector simultaneously be connected with the cathode of first diode D1 and first node Q1, the emitter of first switch tube S1 and the one or two
The anode of pole pipe D1 is connected；The collector of the third switching tube S3 is connected with the cathode of third diode D3, third switch
The emitter of pipe S3 is connected with the anode of third diode D3 and second node Q2 simultaneously；The cathode of the first diode D1
It is connected with the collector of second switch S2, the anode of first diode D1 is connected with the cathode of third diode D3；Described
The anode of third diode D3 is connected with the emitter of the 4th switching tube S4；The collector and second of the second switch S2
The cathode of diode D2 is connected, and the emitter of second switch S2 is connected with the anode of the second diode D2；Described the 4th opens
The collector for closing pipe S4 is connected with the cathode of the 4th diode D4, the sun of the emitter S4 and the 4th diode D4 of the 4th switching tube
Extremely it is connected；The anode of the second diode D2 is connected with the cathode of the 4th diode D4；The of the main switch group SW
One bridge arm midpoint and the second bridge arm midpoint are respectively power cell output positive and negative terminal.
The switching capacity group SC of the present embodiment power cell can not by a switching capacity, two power switch tubes and three
It controls diode to constitute, i.e., by first capacitor C1, the 5th switching tube S5, the 6th switching tube S6, the 5th diode D5, the 6th diode
D6 and the 7th diode D7 is constituted.The anode of the 7th diode D7 simultaneously with the collector of the 5th switching tube S5 and Section five
Point Q5 is connected, and the cathode of the 7th diode D7 is connected with the anode and third node Q3 of first capacitor C1 simultaneously；First electricity
The cathode for holding C1 is connected with the emitter of the emitter of the 5th switching tube S5 and the 6th switching tube S6 simultaneously；5th switching tube
The collector of S5 is connected with the cathode of the 5th diode D5, the anode phase of the emitter and the 5th diode D5 of the 5th switching tube S5
Even；The emitter of the 6th switching tube S6 is connected with the anode of the 6th diode D6, and the 6th switching tube S6 collector is simultaneously
It is connected with the cathode of the 6th diode D6 and fourth node Q4.
The switching capacity of the switching capacity group SC of the present embodiment power cell, i.e. when first capacitor C1 is full of energy, thereon
Voltage it is equal with the voltage on DC power supply.
The effect of the 7th diode D7 of the switching capacity group SC of the present embodiment power cell is limitation switching capacity i.e. the
Electric current on one capacitor C1 is reverse flowed to DC power supply.
The third node Q3 phase of the first node Q1 and switching capacity group SC of the main switch group SW of the present embodiment power cell
Even, the second node Q2 of main switch group SW is connected with the fourth node Q4 of switching capacity group SC.
The anode of the DC power supply of the present embodiment power cell is connected with the 5th node Q5 of switching capacity group SC, direct current
The cathode in source is connected with the fourth node Q4 of switching capacity group SC.
Fig. 3 to Fig. 8 show six kinds of voltage status schematic diagrames of power cell in Fig. 2.If DC power supply in power cell
On DC voltage be E, the DC voltage on switching capacity, that is, first capacitor C1 is E, the control mode of power cell and six kinds
Voltage output state is as follows:
The first voltage output state:
When switching tube S1 conducting, switching tube S2 shutdown, switching tube S3 shutdown, switching tube S4 conducting, switching tube S5 conducting, open
Pipe S6 shutdown is closed, as shown in figure 3, DC power supply is connected with switching capacity, that is, first capacitor C1, Equivalent DC side voltage is 2E, function
The output voltage of rate unit port is 2E.At this point, as shown in the solid arrow in Fig. 3, electric current passes through if current direction is positive
First switch tube S1, load and the 4th switching tube S4 return to the cathode of DC power supply；If current direction is negative, such as dotted arrow
Shown, then electric current returns to the switching capacity i.e. anode of first capacitor C1 by the 4th diode D4, load and first diode D1.
Second of voltage output state:
When switching tube S1 conducting, switching tube S2 shutdown, switching tube S3 shutdown, switching tube S4 conducting, switching tube S5 shutdown, open
Pipe S6 conducting is closed, as shown in figure 4, DC power supply is in parallel with switching capacity, that is, first capacitor C1, Equivalent DC side voltage is E, function
The output voltage of rate unit port is E.At this point, as shown in fig.4 by a solid arrow, electric current passes through if current direction is positive
First switch tube S1, load and the 4th switching tube S4 return to fourth node Q4；If current direction is negative, such as dotted arrow institute
Show, then electric current returns to third node Q3 by the 4th diode D4, load and first diode D1.
The third voltage output state:
When switching tube S1 conducting, switching tube S2 conducting, switching tube S3 shutdown, switching tube S4 shutdown, switching tube S5 shutdown, open
Pipe S6 shutdown is closed, as shown in figure 5, the output voltage of power cell port is 0+.
4th kind of voltage output state:
When switching tube S1 shutdown, switching tube S2 shutdown, switching tube S3 conducting, switching tube S4 conducting, switching tube S5 shutdown, open
Pipe S6 shutdown is closed, as shown in fig. 6, the output voltage of power cell port is 0-.
5th kind of voltage output state:
When switching tube S1 shutdown, switching tube S2 conducting, switching tube S3 conducting, switching tube S4 shutdown, switching tube S5 shutdown, open
Pipe S6 conducting is closed, as shown in fig. 7, DC power supply is in parallel with switching capacity, that is, first capacitor C1, Equivalent DC side voltage is E, function
The output voltage of rate unit port is-E.At this point, as shown in the solid arrow in Fig. 7, electric current passes through if current direction is positive
Second switch S2, load and third switching tube S3 return to fourth node Q4；If current direction is negative, such as dotted arrow institute
Show, then electric current returns to third node Q3 by third diode D3, load and the second diode D2.
6th kind of voltage output state:
When switching tube S1 shutdown, switching tube S2 conducting, switching tube S3 conducting, switching tube S4 shutdown, switching tube S5 conducting, open
Pipe S6 shutdown is closed, as shown in figure 8, DC power supply is connected with switching capacity, that is, first capacitor C1, Equivalent DC side voltage is 2E, function
The output voltage of rate unit port is -2E.At this point, if current direction is positive, as shown in the solid arrow in Fig. 8, electric current warp
Cross the cathode that second switch S2, load and third switching tube S3 return to DC power supply；If current direction is negative, such as dotted line arrow
Shown in head, then electric current is returning to switching capacity i.e. first capacitor C1 just by third diode D3, load and the second diode D2
Pole.
As described above, the port of power cell can export six kinds of 2E, E, 0+, 0-,-E and -2E voltage status, 2E, E,
0, five kinds of voltage levels of-E and -2E.And so on, by controlling the output voltage state of each power cell port, by N number of power
The tandem type six of unit composition, which switchs multi-electrical level inverter, can export 4N+1 kind voltage level.
MOSFET pipe can be used there are many selection in each switching tube in above-described embodiment structure, PowerMosfet is managed,
CoolMosfet pipe and any one in IGBT pipe.
Each anti-paralleled diode in above-described embodiment structure is included inside separate diode or power switch tube
Diode.
It is relatively traditional since the inverter of the present embodiment uses the six switch five-power level power cells using switching capacity
Cascaded H-bridges inverter power unit, each power cell can produce six kinds of output voltage states, five kinds of output voltage electricity
Flat, output voltage grade can also be improved one times.Relative to the multi-electrical level inverter using conventional full bridge structure, the tandem type
Six switch multi-electrical level inverters reduce switch element number in system, improve output waveform quality, effectively reduce harmonic wave
Content alleviates the problems such as electromagnetic interference, can achieve the purpose that optimization system efficiency in watt level occasion.
Claims (4)
1. a kind of tandem type six switchs multi-electrical level inverter, which is characterized in that the inverter is successively suitable by multiple power cells
Sequence cascade is constituted, and the power cell includes main switch group, switching capacity group and DC power supply；The main switch of previous power cell
The second bridge arm midpoint of group is connected to form cascade with the first bridge arm of main switch group midpoint of latter power cell；Cascade first
The midpoint of the first bridge arm of main switch group of power cell is inverter output plus terminal, and the master of the last one cascade power cell opens
The midpoint of the second bridge arm of pass group is the negative terminal of inverter output；The power cell can export six by less number of switches
Kind voltage status, five kinds of voltage levels；The switching capacity group by a switching capacity, two power switch tubes and three not
Controllable diode is constituted, i.e., by first capacitor, the 5th switching tube, the 6th switching tube, the 5th diode, the 6th diode and the 7th
Diode is constituted；The anode of 7th diode is connected with the collector of the 5th switching tube and the 5th node simultaneously, and the seven or two
The cathode of pole pipe is connected with the anode and third node of first capacitor simultaneously；The cathode of the first capacitor is switched with the 5th simultaneously
The emitter of the emitter of pipe and the 6th switching tube is connected；The cathode phase of the collector and the 5th diode of 5th switching tube
Even, the 5th switching tube emitter is connected with the anode of the 5th diode；The emitter and the 6th diode of 6th switching tube
Anode be connected, the 6th switch pipe collector simultaneously is connected with the cathode of the 6th diode and fourth node；
The first node of the main switch group is connected with the third node of switching capacity group；The second node and switch of main switch group
The fourth node of capacitance group is connected；
The DC power anode of the power cell is connected with the 5th node of switching capacity group, the cathode and switch of DC power supply
The fourth node of capacitance group is connected.
2. a kind of tandem type six switchs multi-electrical level inverter according to claim 1, which is characterized in that the main switch group is
Conventional full bridge structure forms the first bridge of main switch group by first switch tube, third switching tube, first diode and third diode
Arm；The second bridge arm of main switch group is formed by second switch, the 4th switching tube, the second diode and the 4th diode；Described
The collector of first switch tube is connected with the cathode of first diode and first node simultaneously, the emitter of first switch tube and the
The anode of one diode is connected；The third switch pipe collector is connected with the cathode of third diode, third switching tube
Emitter is connected with the anode of third diode and second node simultaneously；The cathode and second switch of the first diode
Collector be connected, the anode of first diode is connected with the cathode of third diode；The anode of the third diode with
The emitter of 4th switching tube is connected；The collector of the second switch is connected with the cathode of the second diode, and second opens
The emitter for closing pipe is connected with the anode of the second diode；The collector of 4th switching tube and the cathode of the 4th diode
It is connected, the emitter of the 4th switching tube is connected with the anode of the 4th diode；The anode and the four or two of second diode
The cathode of pole pipe is connected；Main switch group the first bridge arm midpoint and the second bridge arm midpoint is respectively that power cell output is positive and negative
End.
3. a kind of tandem type six switchs multi-electrical level inverter according to claim 1, which is characterized in that the switching capacity group
Switching capacity, that is, first capacitor be full of energy when, voltage thereon is equal with the voltage on DC power supply.
4. a kind of tandem type six switchs multi-electrical level inverter according to claim 1, which is characterized in that the switching capacity group
The 7th diode effect be limit switching capacity, that is, first capacitor on electric current be reverse flowed to DC power supply.
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| CN109194170A (en) * | 2018-09-28 | 2019-01-11 | 华东交通大学 | A kind of seven electrical level inverters using switched-capacitor circuit |
| CN110138250B (en) * | 2019-05-14 | 2020-10-27 | 郑州大学 | Switched capacitor N-level inverter and modulation method thereof |
| CN110233498B (en) * | 2019-06-14 | 2023-03-28 | 郑州大学 | Double-input photovoltaic grid-connected multi-level inverter and control method thereof |
| CN111740625B (en) * | 2020-05-30 | 2021-07-06 | 郑州大学 | Expansion multi-level boosting inversion topology and modulation method |
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