CN108683347A - The seven electrical level inverter topological structures based on voltage-multiplying circuit and seven electrical level inverters - Google Patents
The seven electrical level inverter topological structures based on voltage-multiplying circuit and seven electrical level inverters Download PDFInfo
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- CN108683347A CN108683347A CN201810343131.8A CN201810343131A CN108683347A CN 108683347 A CN108683347 A CN 108683347A CN 201810343131 A CN201810343131 A CN 201810343131A CN 108683347 A CN108683347 A CN 108683347A
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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
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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
- H02M7/539—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 with automatic control of output wave form or frequency
- H02M7/5395—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 with automatic control of output wave form or frequency by pulse-width modulation
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- 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 invention discloses a kind of seven electrical level inverter topological structures based on voltage-multiplying circuit comprising Boost boosts main circuit, full-bridge single-phase inversion main circuit, auxiliary circuit；The Boost boostings main circuit includes inductance L1, diode D1, first switch pipe S1, the full-bridge single-phase inversion main circuit includes the tenth switching tube S10, the 11st switching tube S11, the 12nd switching tube S12, the 13rd switching tube S13；Also disclose a kind of seven electrical level inverters.The present invention effectively adjusts busbar by controlling opening for switching tube, realizes seven electrical level inverters.Compared to traditional seven electrical level inverter, this topological structure has used less switching tube, voltage gain to can reach 30 times of steady-state gains, is suitable for the inverter of low-voltage (photovoltaic, super capacitor etc.) input；The voltage stress for reducing partial switch pipe reduces the switching loss of switching tube, improves system reliability.
Description
Technical field
The invention belongs to converters technical fields, and in particular to a kind of seven level inverse conversions based on voltage-multiplying circuit
Device topological structure and seven electrical level inverters.
Background technology
Raising with real system to voltage and capacity requirement, conventional transducers cannot meet actual demand.If
Two level converters are used for high-voltage large-capacity occasion, it may appear that：The voltage and current distortion of converter is serious, and on-off times increase
So that voltage transformation rate is excessive, surge voltage can then cause the loss of switching tube to increase, and system effectiveness reduces.
Multi-level converter, which has, is easily achieved high voltage, large capacity, and the born voltage of switching tube is low, output level number
It is more, the advantages that harmonic wave of output voltage is small.Multi-level converter topology structure mainly include diode clamp bit-type, striding capacitance type and
Cascade connection type.The number of diodes of diode clamp bit-type multi-electrical level inverter is sharply increased with the increase of level number；Three level
The above DC bus mid-point voltage is difficult to balance；It is influenced by the dispersibility and stray parameter of clamp diode, two pole of each clamper
The voltage that pipe is born is uneven.The capacitance quantity of striding capacitance type multi-electrical level inverter drastically increases with the increase of level number
Add.Cascade multilevel inverter needs independent DC power supply, or uses Multiple coil phase-shifting transformer, the big cost of volume
It is high.
Invention content
In view of this, the main purpose of the present invention is to provide a kind of seven electrical level inverter topology knots based on voltage-multiplying circuit
Structure and seven electrical level inverters.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
The embodiment of the present invention improves a kind of seven electrical level inverter topological structures based on voltage-multiplying circuit comprising Boost liters
Press main circuit, full-bridge single-phase inversion main circuit, auxiliary circuit；The Boost boostings main circuit includes inductance L1, diode D1,
One switching tube S1, the full-bridge single-phase inversion main circuit includes the tenth switching tube S10, the 11st switching tube S11, the 12nd switching tube
S12, the 13rd switching tube S13, the auxiliary circuit includes second switch pipe S2, third switching tube S3, the 4th switching tube S4, the 5th
Switching tube S5, the 6th switching tube S6, the 7th switching tube S7, the 8th switching tube S8, the 9th switching tube S9, the first capacitance C1, second electricity
Hold C2, third capacitance C3, the 4th capacitance C4, the anode of busbar voltage is successively by inductance L1, diode D1, the 5th switching tube S5、
7th switching tube S7, the 8th switching tube S8, the 12nd switching tube S12, the 13rd switching tube S13It is connected to the cathode of busbar voltage, institute
State the first capacitance C1It is connected in parallel on anode and inductance L that between the positive and negative anodes of a busbar voltage and end is connected to busbar voltage1Between,
The concatenated second switch pipe S2, the second capacitance C2It is connected in parallel between the positive and negative anodes of busbar voltage and an end is connected to diode
D1With the 5th switching tube S5Between, the concatenated third capacitance C3, the 4th switching tube S4Be connected in parallel on busbar voltage positive and negative anodes it
Between and an end be connected to the 5th switching tube S5With the 7th switching tube S7Between, the concatenated 4th capacitance C4, the 9th switching tube S9
It is connected in parallel between the positive and negative anodes of busbar voltage and an end is connected to the 8th switching tube S8With the 12nd switching tube S12Between, the string
Tenth switching tube S of connection10, the 11st switching tube S11It is connected in parallel between the positive and negative anodes of busbar voltage and an end is connected to the 8th and opens
Close pipe S8With the 12nd switching tube S12Between；The third switching tube S3Both ends be connected to second switch pipe S respectively2With the second electricity
Hold C2Between and third capacitance C3With the 4th switching tube S4Between, the 6th switching tube S6An end be connected to the 5th switching tube
S5With the 7th switching tube S7Between, it is another to be terminated at the 4th capacitance C4With the 9th switching tube S9Between；Voltage output is terminated at the tenth
Switching tube S10With the 11st switching tube S11Between and the 12nd switching tube S12With the 13rd switching tube S13Between；Two pole
Pipe D1, second switch pipe S2, the 5th switching tube S5Joint also by being directly connected to the 8th switching tube S all the way8, the 4th capacitance C4Altogether
Meet place.
In said program, the first working condition of the seven electrical level inverter topological structures based on voltage-multiplying circuit：Institute
State first switch pipe S1Conducting, busbar voltage VinTo inductance L1Store energy；Tenth switching tube S10With the 12nd switching tube S12It leads
It is logical, output voltage UabIt is 0；The second capacitance C2, third capacitance C3, the 4th capacitance C4Energy remains unchanged；
Second of working condition：First switch pipe S1Shutdown, busbar voltage VinWith inductance L1Simultaneously to full-bridge single-phase inversion
Main circuit provides energy；The second switch pipe S2, the 4th switching tube S4, the 5th switching tube S5, the 7th switching tube S7, the 8th open
Close pipe S8, the 9th switching tube S9Conducting；The second capacitance C2, third capacitance C3, the 4th capacitance C4Its both end voltage in parallel quilt
It is filled to Vboost, busbar voltage is equal to V at this timeboost；The tenth switching tube S10With the 13rd switching tube S13Conducting, output electricity
Pressure is Vboost；
The third working condition：The third switching tube S3, the 5th switching tube S5, the 7th switching tube S7, the 8th switching tube
S8, the tenth switching tube S10Conducting；The second capacitance C2, third capacitance C3Series connection while the 4th capacitance C4It disconnects, busbar voltage etc.
In 2*Vboost；The tenth switching tube S10With the 13rd switching tube S13Conducting, output voltage 2*Vboost；
4th kind of working condition：The third switching tube S3, the 5th switching tube S5, the 6th switching tube S6Conducting；Described second
Capacitance C2, third capacitance C3, the 4th capacitance C4Series connection, busbar voltage are equal to 3*Vboost；The tenth switching tube S10With the 13rd
Switching tube S13Conducting, output voltage 3*Vboost。
5th kind of working condition：The first switch pipe S1Conducting, busbar voltage VinTo inductance L1Store energy；Described
11 switching tube S11With the 13rd switching tube S13Conducting, output voltage UabIt is 0；The second capacitance C2, third capacitance C3, the 4th
Capacitance C4Energy remains unchanged；
6th kind of working condition：The first switch pipe S1Shutdown, busbar voltage VinWith inductance L1It is single-phase to full-bridge simultaneously
Inverter main circuit provides energy；The second switch pipe S2, the 4th switching tube S4, the 5th switching tube S5, the 7th switching tube S7,
Eight switching tube S8, the 9th switching tube S9Conducting.The second capacitance C2, third capacitance C3, the 4th capacitance C4Its both end voltage in parallel
It is filled to Vboost, busbar voltage is equal to V at this timeboost.Switch S11With S12Conducting, output voltage are-Vboost；
7th kind of working condition：The third switching tube S3, the 5th switching tube S5, the 7th switching tube S7, the 8th switching tube
S8, the tenth switching tube S10Conducting.The second capacitance C2, third capacitance C3Series connection while the 4th capacitance C4It disconnects, busbar voltage etc.
In 2*Vboost；The 11st switching tube S11With the 12nd switching tube S12Conducting, output voltage are -2*Vboost；
8th kind of working condition：The third switching tube S3, the 5th switching tube S5, the 7th switching tube S7, the 8th switching tube
S8, the tenth switching tube S10Conducting.The second capacitance C2, third capacitance C3, the 4th capacitance C4Series connection, busbar voltage are equal to 3*
Vboost；The 11st switching tube S11With the 12nd switching tube S12Conducting, output voltage are -3*Vboost。
In said program, the first described working condition and the 5th kind of working condition indicate state when output is 0, second
Kind working condition and the 6th kind of working condition indicate state, the third working condition and the 8th kind of work shape when output is ± 1
State indicates that state, the 4th kind of working condition and the 7th kind of working condition when output is ± 2 indicate that state when output is ± 3 is total
With one industrial frequency AC period of formation.
The embodiment of the present invention also provides a kind of seven electrical level inverters, including DC power supply, further includes：As appointed in said program
The seven electrical level inverter topological structures based on voltage-multiplying circuit described in one, the positive level and negative level of the DC power supply respectively with
The positive and negative anodes of busbar voltage connect.
In said program, further include：Controller is generated and is respectively switched in trigger pulse seven electrical level inverter topological structures of control
The break-make of pipe is connected the combination with shutdown by different switching tubes, realizes the different operating of the seven level inverse conversions topological structure
State.
In said program, including multiple seven level inverse conversions topological structures, the multiple seven level inverse conversions topological structure
Electrical combination forms polyphase inverter.
Compared with prior art, beneficial effects of the present invention：
The present invention effectively adjusts busbar by controlling opening for switching tube, realizes seven electrical level inverters.Compared to traditional
Seven electrical level inverter this topological structure have used less switching tube, voltage gain to can reach 30 times of steady-state gains, be suitable for low
The inverter of voltage (photovoltaic, super capacitor etc.) input；The voltage stress for reducing partial switch pipe reduces opening for switching tube
Loss is closed, system reliability is improved.
Description of the drawings
Fig. 1 provides a kind of schematic diagram of the seven electrical level inverter topological structures based on voltage-multiplying circuit for the embodiment of the present invention；
Fig. 2 provides a kind of control principle of the seven electrical level inverter topological structures based on voltage-multiplying circuit for the embodiment of the present invention
Figure；
It is single-phase that Fig. 3 for the embodiment of the present invention provides full-bridge in a kind of seven electrical level inverter topological structures based on voltage-multiplying circuit
The output waveform figure of inverter main circuit；
Fig. 4 provides a kind of the first work of the seven electrical level inverter topological structures based on voltage-multiplying circuit for the embodiment of the present invention
Make status diagram；
Fig. 5 provides a kind of second of work of the seven electrical level inverter topological structures based on voltage-multiplying circuit for the embodiment of the present invention
Make status diagram；
Fig. 6 provides a kind of the third work of the seven electrical level inverter topological structures based on voltage-multiplying circuit for the embodiment of the present invention
Make status diagram；
Fig. 7 provides a kind of 4th kind of work of the seven electrical level inverter topological structures based on voltage-multiplying circuit for the embodiment of the present invention
Make status diagram；
Fig. 8 provides a kind of 5th kind of work of the seven electrical level inverter topological structures based on voltage-multiplying circuit for the embodiment of the present invention
Make status diagram；
Fig. 9 provides a kind of 6th kind of work of the seven electrical level inverter topological structures based on voltage-multiplying circuit for the embodiment of the present invention
Make status diagram；
Figure 10 provides the 7th kind of a kind of seven electrical level inverter topological structures based on voltage-multiplying circuit for the embodiment of the present invention
Working state schematic representation；
Figure 11 provides the 8th kind of a kind of seven electrical level inverter topological structures based on voltage-multiplying circuit for the embodiment of the present invention
Working state schematic representation；
Figure 12 is that the PWM of main switch generates logic chart；
Figure 13 is each switching tube pwm signal simulation waveform of logic circuit；
Figure 14 is simulation result.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The embodiment of the present invention provides a kind of seven electrical level inverter topological structures based on voltage-multiplying circuit, as shown in Figure 1, it is wrapped
Include Boost boostings main circuit, full-bridge single-phase inversion main circuit, auxiliary circuit；The Boost boostings main circuit includes inductance L1、
Diode D1, first switch pipe S1, the full-bridge single-phase inversion main circuit includes the tenth switching tube S10, the 11st switching tube S11、
12nd switching tube S12, the 13rd switching tube S13, the auxiliary circuit includes second switch pipe S2, third switching tube S3, the 4th
Switching tube S4, the 5th switching tube S5, the 6th switching tube S6, the 7th switching tube S7, the 8th switching tube S8, the 9th switching tube S9, first
Capacitance C1, the second capacitance C2, third capacitance C3, the 4th capacitance C4, the anode of busbar voltage is successively by inductance L1, diode D1、
5th switching tube S5, the 7th switching tube S7, the 8th switching tube S8, the 12nd switching tube S12, the 13rd switching tube S13It is connected to busbar
The cathode of voltage, the first capacitance C1It is connected in parallel between the positive and negative anodes of busbar voltage and an end is connected to the anode of busbar voltage
With inductance L1Between, the concatenated second switch pipe S2, the second capacitance C2It is connected in parallel between the positive and negative anodes of busbar voltage and one
It is terminated at diode D1With the 5th switching tube S5Between, the concatenated third capacitance C3, the 4th switching tube S4It is connected in parallel on busbar electricity
Between the positive and negative anodes of a pressure and end is connected to the 5th switching tube S5With the 7th switching tube S7Between, the concatenated 4th capacitance C4、
9th switching tube S9It is connected in parallel between the positive and negative anodes of busbar voltage and an end is connected to the 8th switching tube S8With the 12nd switching tube
S12Between, the concatenated tenth switching tube S10, the 11st switching tube S11It is connected in parallel between the positive and negative anodes of busbar voltage and one
It is terminated at the 8th switching tube S8With the 12nd switching tube S12Between；The third switching tube S3Both ends be connected to second switch respectively
Pipe S2With the second capacitance C2Between and third capacitance C3With the 4th switching tube S4Between, the 6th switching tube S6A termination
In the 5th switching tube S5With the 7th switching tube S7Between, it is another to be terminated at the 4th capacitance C4With the 9th switching tube S9Between；Voltage is defeated
Go out and is terminated at the tenth switching tube S10With the 11st switching tube S11Between and the 12nd switching tube S12With the 13rd switching tube S13
Between；The diode D1, second switch pipe S2, the 5th switching tube S5Joint also by being directly connected to the 8th switching tube all the way
S8, the 4th capacitance C4Joint.
When system is in stable state, output voltage is decided by the modulation ratio Ma of system.Output voltage Vab has seven kinds of fortune
Row state：3Vboost t、2Vboost、Vboost、0、-3Vboost t、-2Vboost、-Vboost.Voltage VboostFor front end Boost circuit
Output.Wherein V_boost=V_in*1/ (1-D), D are Boost circuit duty ratio；Therefore full-bridge inverting output voltage is most
It is the 3* (1-D) of input direct-current voltage times when big, 1>D>0.
Inverter output voltage as shown in Figure 1 can be directly by switching tube S in Boost circuit1Duty ratio determine.It is false herein
If inverter SPWM modulation ratios are Ma, then inverter output voltage Vout-maxIt can be obtained by formula 1.
Therefore in MaFor constant when inverter output voltage maximum value can directly by adjust Boost circuit duty ratio it is complete
At.Then system control method is as shown in Figure 2.
Relationship such as table 1 between the on off state and output voltage of switching tube, wherein Boost circuit can independent work
Make.
1 on off state of table and output voltage relation table
As shown in table 1：Seven electrical level inverter of this system is completed by seven kinds of state checkers, H bridges (i.e. full-bridge single-phase inversion
Main circuit) output waveform is as shown in Figure 3.
As shown in Figure 3：When positive half cycle switch tube working status is ABBA, H bridges output voltage grade is+1, work shape
H bridges output voltage grade is+2 when state is BCCB, and when working condition is CDCD, H bridge output voltage grades are+3.When in negative half period
When output voltage grade is -1, -2, -3, the working condition of switching tube is respectively EFFE, FGGF and GHGH.It is exported filters by LC
Wave circuit can obtain complete sinusoidal ac.
The varying level state of the present invention is mainly by switching tube S2~S9And capacitance C2、C3With C4It completes；Pass through alteration switch
The opening state of pipe changes the series and parallel structure of capacitance, realizes the function of changing busbar voltage.Fig. 4 respectively shows seven kinds of states
When circuit operation principle.The first described working condition and the 5th kind of working condition indicate state when output is 0, second
Working condition and the 6th kind of working condition indicate state, the third working condition and the 8th kind of working condition when output is ± 1
Indicate that state when output is ± 2, the 4th kind of working condition and the 7th kind of working condition indicate that state when output is ± 3 is common
Form an industrial frequency AC period.
As shown in figure 4, the first working condition of the seven electrical level inverter topological structures based on voltage-multiplying circuit：It is described
First switch pipe S1Conducting, busbar voltage VinTo inductance L1Store energy；Tenth switching tube S10With the 12nd switching tube S12Conducting,
Output voltage UabIt is 0；The second capacitance C2, third capacitance C3, the 4th capacitance C4Energy remains unchanged；
As shown in figure 5, second of working condition：First switch pipe S1Shutdown, busbar voltage VinWith inductance L1Simultaneously to complete
Bridge single-phase inversion main circuit provides energy；The second switch pipe S2, the 4th switching tube S4, the 5th switching tube S5, the 7th switching tube
S7, the 8th switching tube S8, the 9th switching tube S9Conducting；The second capacitance C2, third capacitance C3, the 4th capacitance C4Its both ends in parallel
Voltage is filled to Vboost, busbar voltage is equal to V at this timeboost；The tenth switching tube S10With the 13rd switching tube S13It leads
It is logical, output voltage Vboost；
As shown in fig. 6, the third working condition：The third switching tube S3, the 5th switching tube S5, the 7th switching tube S7,
Eight switching tube S8, the tenth switching tube S10Conducting；The second capacitance C2, third capacitance C3Series connection while the 4th capacitance C4It disconnects, it is female
Line voltage is equal to 2*Vboost；The tenth switching tube S10With the 13rd switching tube S13Conducting, output voltage 2*Vboost；
As shown in fig. 7, the 4th kind of working condition：The third switching tube S3, the 5th switching tube S5, the 6th switching tube S6It leads
It is logical；The second capacitance C2, third capacitance C3, the 4th capacitance C4Series connection, busbar voltage are equal to 3*Vboost；Tenth switching tube
S10With the 13rd switching tube S13Conducting, output voltage 3*Vboost。
As shown in figure 8, the 5th kind of working condition：The first switch pipe S1Conducting, busbar voltage VinTo inductance L1Storage
Energy；The 11st switching tube S11With the 13rd switching tube S13Conducting, output voltage UabIt is 0；The second capacitance C2,
Three capacitance C3, the 4th capacitance C4Energy remains unchanged；
As shown in figure 9, the 6th kind of working condition：The first switch pipe S1Shutdown, busbar voltage VinWith inductance L1Simultaneously
Energy is provided to full-bridge single-phase inversion main circuit；The second switch pipe S2, the 4th switching tube S4, the 5th switching tube S5, the 7th open
Close pipe S7, the 8th switching tube S8, the 9th switching tube S9Conducting.The second capacitance C2, third capacitance C3, the 4th capacitance C4It is in parallel its
Both end voltage is filled to Vboost, busbar voltage is equal to V at this timeboost.Switch S11With S12Conducting, output voltage are-Vboost；
As shown in Figure 10, the 7th kind of working condition：The third switching tube S3, the 5th switching tube S5, the 7th switching tube S7、
8th switching tube S8, the tenth switching tube S10Conducting.The second capacitance C2, third capacitance C3Series connection while the 4th capacitance C4It disconnects,
Busbar voltage is equal to 2*Vboost；The 11st switching tube S11With the 12nd switching tube S12Conducting, output voltage are -2*Vboost；
As shown in figure 11, the 8th kind of working condition：The third switching tube S3, the 5th switching tube S5, the 7th switching tube S7、
8th switching tube S8, the tenth switching tube S10Conducting.The second capacitance C2, third capacitance C3, the 4th capacitance C4Series connection, busbar electricity
Pressure is equal to 3*Vboost；The 11st switching tube S11With the 12nd switching tube S12Conducting, output voltage are -3*Vboost。
To verify the feasibility of this system, builds main circuit simulation model using PSIM and the present invention is verified, and root
Upper working condition sets up the rational logic analysis sequential of meter separately according to this, generates logic chart as shown in figure 12 for the PWM of main switch.
High-frequency carrier signal is triangular wave, and frequency directly controls the chopping frequency of switching tube.High frequency chopping signal be with
The identical square wave of carrier signal, duty ratio 50%.Pass through each switching tube pwm signal simulation waveform such as Figure 13 of the above logic circuit
It is shown.
Main topological structure as shown in Figure 1, circuit simulation parameter are as shown in table 2.
2 circuit simulation parameter of table
By designing its simulation result of circuit parameter such as Figure 14 shown in table 2.H bridges output voltage has been replaced by seven states
At load voltage passes through LC filter circuit output smoothings.
Capacitance C2, C3 and C4 terminal voltage concussion for multiplication of voltage is smaller.When to make reduction capacitance terminal oscillation can be appropriate
Increase switching frequency, simultaneously increases switching frequency to reduce capacitance and inductance value, its size and then increase system can be reduced
Power density.The voltage stress of switching tube is as shown in table 3.
3 switch tube voltage stress of table
It is the voltage stress of each switching tube as shown in table 3.Reduce compared to traditional multi-electrical level inverter topological structure
The voltage stress of partial switch pipe, therefore its switching loss can be effectively reduced, reduce the stabilization that system loss increases system
Property.
The embodiment of the present invention also provides a kind of seven electrical level inverters, including DC power supply, further includes：Such as institute in said program
The seven electrical level inverter topological structures based on voltage-multiplying circuit stated, the positive level and negative level of the DC power supply respectively with busbar
The positive and negative anodes of voltage connect.
Seven electrical level inverter further includes：Controller generates trigger pulse and controls in seven electrical level inverter topological structures
The break-make of each switching tube is connected the combination with shutdown by different switching tubes, realizes the seven level inverse conversions topological structure not
Same working condition.
Further, including multiple seven level inverse conversions topological structures, the multiple seven level inverse conversions topological structure are electric
It combines to form polyphase inverter in road.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (6)
1. a kind of seven electrical level inverter topological structures based on voltage-multiplying circuit, which is characterized in that it includes the main electricity of Boost boostings
Road, full-bridge single-phase inversion main circuit, auxiliary circuit；The Boost boostings main circuit includes inductance L1, diode D1, first switch
Pipe S1, the full-bridge single-phase inversion main circuit includes the tenth switching tube S10, the 11st switching tube S11, the 12nd switching tube S12,
13 switching tube S13, the auxiliary circuit includes second switch pipe S2, third switching tube S3, the 4th switching tube S4, the 5th switching tube
S5, the 6th switching tube S6, the 7th switching tube S7, the 8th switching tube S8, the 9th switching tube S9, the first capacitance C1, the second capacitance C2,
Three capacitance C3, the 4th capacitance C4, the anode of busbar voltage is successively by inductance L1, diode D1, the 5th switching tube S5, the 7th switch
Pipe S7, the 8th switching tube S8, the 12nd switching tube S12, the 13rd switching tube S13It is connected to the cathode of busbar voltage, first electricity
Hold C1It is connected in parallel on anode and inductance L that between the positive and negative anodes of a busbar voltage and end is connected to busbar voltage1Between, the series connection
Second switch pipe S2, the second capacitance C2It is connected in parallel between the positive and negative anodes of busbar voltage and an end is connected to diode D1With the 5th
Switching tube S5Between, the concatenated third capacitance C3, the 4th switching tube S4It is connected in parallel between the positive and negative anodes of busbar voltage and one
It is terminated at the 5th switching tube S5With the 7th switching tube S7Between, the concatenated 4th capacitance C4, the 9th switching tube S9It is connected in parallel on mother
Between the positive and negative anodes of a line voltage and end is connected to the 8th switching tube S8With the 12nd switching tube S12Between, the described concatenated tenth
Switching tube S10, the 11st switching tube S11It is connected in parallel between the positive and negative anodes of busbar voltage and an end is connected to the 8th switching tube S8With
12 switching tube S12Between；The third switching tube S3Both ends be connected to second switch pipe S respectively2With the second capacitance C2Between, with
And third capacitance C3With the 4th switching tube S4Between, the 6th switching tube S6An end be connected to the 5th switching tube S5It is opened with the 7th
Close pipe S7Between, it is another to be terminated at the 4th capacitance C4With the 9th switching tube S9Between；Voltage output is terminated at the tenth switching tube S10With
11st switching tube S11Between and the 12nd switching tube S12With the 13rd switching tube S13Between；The diode D1, second
Switching tube S2, the 5th switching tube S5Joint also by being directly connected to the 8th switching tube S all the way8, the 4th capacitance C4Joint.
2. the seven electrical level inverter topological structures according to claim 1 based on voltage-multiplying circuit, which is characterized in that the base
In the first working condition of seven electrical level inverter topological structures of voltage-multiplying circuit：The first switch pipe S1Conducting, busbar electricity
Press VinTo inductance L1Store energy；Tenth switching tube S10With the 12nd switching tube S12Conducting, output voltage UabIt is 0；Described second
Capacitance C2, third capacitance C3, the 4th capacitance C4Energy remains unchanged；
Second of working condition：First switch pipe S1Shutdown, busbar voltage VinWith inductance L1Simultaneously to full-bridge single-phase inversion main circuit
Energy is provided；The second switch pipe S2, the 4th switching tube S4, the 5th switching tube S5, the 7th switching tube S7, the 8th switching tube S8、
9th switching tube S9Conducting；The second capacitance C2, third capacitance C3, the 4th capacitance C4Its both end voltage in parallel is filled to
Vboost, busbar voltage is equal to V at this timeboost；The tenth switching tube S10With the 13rd switching tube S13Conducting, output voltage are
Vboost；
The third working condition：The third switching tube S3, the 5th switching tube S5, the 7th switching tube S7, the 8th switching tube S8, the tenth
Switching tube S10Conducting；The second capacitance C2, third capacitance C3Series connection while the 4th capacitance C4It disconnects, busbar voltage is equal to 2*
Vboost；The tenth switching tube S10With the 13rd switching tube S13Conducting, output voltage 2*Vboost；
4th kind of working condition：The third switching tube S3, the 5th switching tube S5, the 6th switching tube S6Conducting；Second capacitance
C2, third capacitance C3, the 4th capacitance C4Series connection, busbar voltage are equal to 3*Vboost；The tenth switching tube S10With the 13rd switch
Pipe S13Conducting, output voltage 3*Vboost。
5th kind of working condition：The first switch pipe S1Conducting, busbar voltage VinTo inductance L1Store energy；Described 11st
Switching tube S11With the 13rd switching tube S13Conducting, output voltage UabIt is 0；The second capacitance C2, third capacitance C3, the 4th capacitance
C4Energy remains unchanged；
6th kind of working condition：The first switch pipe S1Shutdown, busbar voltage VinWith inductance L1Simultaneously to full-bridge single-phase inversion master
Circuit provides energy；The second switch pipe S2, the 4th switching tube S4, the 5th switching tube S5, the 7th switching tube S7, the 8th switch
Pipe S8, the 9th switching tube S9Conducting.The second capacitance C2, third capacitance C3, the 4th capacitance C4Its both end voltage in parallel is filled
Completely to Vboost, busbar voltage is equal to V at this timeboost.Switch S11With S12Conducting, output voltage are-Vboost；
7th kind of working condition：The third switching tube S3, the 5th switching tube S5, the 7th switching tube S7, the 8th switching tube S8, the tenth
Switching tube S10Conducting.The second capacitance C2, third capacitance C3Series connection while the 4th capacitance C4It disconnects, busbar voltage is equal to 2*
Vboost；The 11st switching tube S11With the 12nd switching tube S12Conducting, output voltage are -2*Vboost；
8th kind of working condition：The third switching tube S3, the 5th switching tube S5, the 7th switching tube S7, the 8th switching tube S8, the tenth
Switching tube S10Conducting.The second capacitance C2, third capacitance C3, the 4th capacitance C4Series connection, busbar voltage are equal to 3*Vboost；It is described
11st switching tube S11With the 12nd switching tube S12Conducting, output voltage are -3*Vboost。
3. the seven electrical level inverter topological structures according to claim 2 based on voltage-multiplying circuit, which is characterized in that described
A kind of working condition and the 5th kind of working condition indicate state, second of working condition and the 6th kind of work shape when output is 0
State indicate state, the third working condition and eight kind working condition of the output when be ± 1 indicate to export state when being ± 2,
4th kind of working condition and the 7th kind of working condition indicate that an industrial frequency AC period is collectively formed in state when output is ± 3.
4. a kind of seven electrical level inverters, including DC power supply, which is characterized in that further include：Such as any power in claims 1 to 3
Profit requires the seven electrical level inverter topological structures based on voltage-multiplying circuit, and the positive level and negative electricity of the DC power supply are divided equally
It is not connect with the positive and negative anodes of busbar voltage.
5. seven electrical level inverter according to claim 4, which is characterized in that further include：Controller generates trigger pulse control
The break-make for making each switching tube in seven electrical level inverter topological structures is connected the combination with shutdown by different switching tubes, realizes institute
State the different working condition of seven level inverse conversion topological structures.
6. seven electrical level inverter according to claim 5, which is characterized in that including multiple seven level inverse conversions topology knots
Structure, the multiple seven level inverse conversions topological structure electrical combination form polyphase inverter.
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| CN113258814A (en) * | 2021-06-11 | 2021-08-13 | 郑州大学 | High-gain low-stress photovoltaic multi-level inverter and control method |
| CN113839575A (en) * | 2021-07-16 | 2021-12-24 | 安徽建筑大学 | Boost seven-level inverter with triple voltage gain |
| CN115864833A (en) * | 2022-12-09 | 2023-03-28 | 广东工业大学 | Embedded multi-level reconfigurable switched capacitor converter |
| CN116707332A (en) * | 2023-06-09 | 2023-09-05 | 深圳市恒运昌真空技术有限公司 | Inverter and multi-level generation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802588A (en) * | 2019-03-06 | 2019-05-24 | 华南理工大学 | A kind of certainly balanced seven electrical level inverters of the capacitor of low voltage stress |
| CN112564529A (en) * | 2020-12-09 | 2021-03-26 | 广东工业大学 | Boost seven-level inverter |
| CN112564529B (en) * | 2020-12-09 | 2023-05-23 | 广东工业大学 | Boost seven-level inverter |
| CN113258814A (en) * | 2021-06-11 | 2021-08-13 | 郑州大学 | High-gain low-stress photovoltaic multi-level inverter and control method |
| CN113839575A (en) * | 2021-07-16 | 2021-12-24 | 安徽建筑大学 | Boost seven-level inverter with triple voltage gain |
| CN113839575B (en) * | 2021-07-16 | 2023-09-22 | 安徽建筑大学 | Boost seven-level inverter with three-time voltage gain |
| CN115864833A (en) * | 2022-12-09 | 2023-03-28 | 广东工业大学 | Embedded multi-level reconfigurable switched capacitor converter |
| CN115864833B (en) * | 2022-12-09 | 2023-06-16 | 广东工业大学 | Embedded multi-level reconfigurable switched capacitor converter |
| CN116707332A (en) * | 2023-06-09 | 2023-09-05 | 深圳市恒运昌真空技术有限公司 | Inverter and multi-level generation method thereof |
| CN116707332B (en) * | 2023-06-09 | 2024-02-02 | 深圳市恒运昌真空技术股份有限公司 | Inverter and multi-level generation method thereof |
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