CN106712558A - High-reliability five-level three-phase dual-input inverter - Google Patents
High-reliability five-level three-phase dual-input inverter Download PDFInfo
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- CN106712558A CN106712558A CN201710045204.0A CN201710045204A CN106712558A CN 106712558 A CN106712558 A CN 106712558A CN 201710045204 A CN201710045204 A CN 201710045204A CN 106712558 A CN106712558 A CN 106712558A
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- switching tube
- diode
- sine wave
- positive pole
- filter inductance
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Classifications
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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
- H02M7/49—Combination of the output voltage waveforms of a plurality of converters
-
- 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
Abstract
The invention discloses a high-reliability five-level three-phase dual-input inverter. One kind of three-phase dual-input inverter is composed of two independent input sources, twelve switch tubes, twelve diodes and six filtering inductors. The other kind of three-phase dual-input inverter is composed of two independent input sources, twelve switch tubes, eight diodes and six filtering inductors. When the inverter of the invention is in any mode, one of an upper arm and a lower arm is in reverse series connection with one of the diodes in the topology, and shoot-through can be avoided structurally, and reliability is high; multi-level output is realized by means of combination and conversion of the two input power sources and the switches; the voltages Vin1 and Vin2 of the two input sources of the system are different, so that power can be supplied for the inverter in a time-division manner through control; and if the voltages Vin1 and Vin2 are obtained through boosting, one part of the output power of the system comes from Vin1, the other part of the output power of the system comes from a boosting unit, and therefore, single-stage conversion of part of the power can be realized, and the capacity of the boosting unit can be decreased, and the efficiency of the system can be improved.
Description
Technical field
The invention belongs to electric and electronic technical field, DC-AC conversion technical field is especially belonged to, refer specifically to a kind of nothing
The three-phase dual input inverter of bridge arm direct pass risk.
Background technology
With the fast development of the technologies such as airplane power source, generation of electricity by new energy, electric automobile, high reliability high-efficiency inverter
Inversion transformation technique has obtained extensive concern.
The switch bridge arm of conventional three-phase inverter is in series by two switching tubes, switchs bridge arm directly and direct current subject string
Connection, in order to prevent switching bridge arm direct pass, it is necessary to add suitable Dead Time to switching tube.This can cause inverter output waveforms
Degradation, and inverter is when being interfered, and two switching tubes are still present and simultaneously turn on and cause dc source short circuit
Danger.
On the other hand, in high-tension high-power inversion occasion, multi-level inverse conversion technology gets growing concern for, people
Propose different circuit topological structures and control strategy, but multi-electrical level inverter is still present, and circuit is complicated, controlling party
The shortcomings of method is complicated, influences the reliability of inverter system.
The content of the invention
It is an object of the invention to propose the level three-phase dual input inverter of high reliability five, for above being carried from Structure Mechanism
Height carries out reliability when direct current-three-phase alternating current is converted to multiple input dc power potential sources, and forms five level modulations, reduces humorous
Ripple.
To achieve the above object, the present invention proposes two schemes.
Level the first structure of three-phase dual input inverter of the high reliability five is by the first DC input voitage source
(Vin1), the second DC input voitage source (Vin2), first switch pipe (S1), second switch pipe (S2), the 3rd switching tube (S3),
Four 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 open
Close pipe (S9), the tenth switching tube (S10), the 11st switching tube (S11), the 12nd switching tube (S12), the first diode (D1),
Two diode (D2), the 3rd diode (D3), the 4th diode (D4), the 5th diode (D5), the 6th diode (D6), the seven or two
Pole pipe (D7), the 8th diode (D8), the 9th diode (D9), the tenth diode (D10), the 11st diode (D11), the 12nd
Diode (D12) the first filter inductance (L1), the second filter inductance (L2), the 3rd filter inductance (L3), the 4th filter inductance (L4)、
5th filter inductance (L5), the 6th filter inductance (L6) constitute.And the first DC input voitage source (Vin1) must be not less than
Two DC input voitage source (Vin2) voltage.
Level second structure of three-phase dual input inverter of the high reliability five is by the first DC input voitage source
(Vin1), the second DC input voitage source (Vin2), first switch pipe (S1), second switch pipe (S2), the 3rd switching tube (S3),
Four 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 open
Close pipe (S9), the tenth switching tube (S10), the 11st switching tube (S11), the 12nd switching tube (S12), the first diode (D1),
Four diode (D4), the 5th diode (D5), the 6th diode (D6), the 7th diode (D7), the 8th diode (D8), the 9th 2
Pole pipe (D9), the 12nd diode (D12) the first filter inductance (L1), the second filter inductance (L2), the 3rd filter inductance (L3),
Four filter inductance (L4), the 5th filter inductance (L5), the 6th filter inductance (L6) constitute.And the first DC input voitage source
(Vin1) the second DC input voitage source (V must be not less thanin2) voltage.
The connected mode of the input power of the three-phase inverter is：
To the first structure：
First DC input voitage source (Vin1) positive pole be connected to first switch pipe (S1), the 5th switching tube (S5), the 9th
Switching tube (S9) colelctor electrode and the 4th diode (D4), the 8th diode (D8), the 12nd diode (D12) negative pole；First
DC input voitage source (Vin1) negative pole be connected to the second DC input voitage source (Vin2) negative pole, the 4th switching tube (S4)
Emitter stage, the 8th switching tube (S8) emitter stage, the 12nd switching tube (S12) emitter stage and the first diode (D1) positive pole,
5th diode (D5) positive pole, the 9th diode (D9) positive pole.
Second direct current input source (Vin2) positive pole pass through six diode (D2、D3、D6、D7、D10、D11), six switching tubes
(S2、S3、S6、S7、S10、S11) it is linked into circuit；Second diode (D2) positive pole be connected to the second DC input voitage source
(Vin2) positive pole, the second diode (D2) negative pole be connected to second switch pipe (S2) colelctor electrode；3rd switching tube (S3)
Emitter stage is connected to the second DC input voitage source (Vin2) positive pole, the 3rd switching tube (S3) colelctor electrode be connected to the three or two
Pole pipe (D3) negative pole；6th diode (D6) positive pole be connected to the second DC input voitage source (Vin2) positive pole, the six or two
Pole pipe (D6) negative pole be connected to the 6th switching tube (S6) colelctor electrode；7th switching tube (S7) emitter stage to be connected to second straight
Stream input voltage source (Vin2) positive pole, the 7th switching tube (S7) colelctor electrode be connected to the 7th diode (D7) negative pole；Tenth
Diode (D10) positive pole be connected to the second DC input voitage source (Vin2) positive pole, the tenth diode (D10) negative pole connection
In the tenth switching tube (S10) colelctor electrode；11st switching tube (S11) emitter stage be connected to the second DC input voitage source
(Vin2) positive pole, the 11st switching tube (S11) colelctor electrode be connected to the 11st diode (D11) negative pole.Second direct current is defeated
Enter voltage source (Vin2) negative pole be connected to the first DC input voitage source (Vin1) negative pole, the 4th switching tube (S4) transmitting
Pole, the 8th switching tube (S8) emitter stage, the 12nd switching tube (S12) emitter stage and the first diode (D1) positive pole, the 5th
Diode (D5) positive pole, the 9th diode (D9) positive pole.
For second structure：
First DC input voitage source (Vin1) connected mode is identical with the first.
Second direct current input source (Vin2) positive pole pass through two diode (D6、D7), six switching tube (S2、S3、S6、S7、
S10、S11) it is linked into circuit；6th diode (D6) positive pole be connected to the second DC input voitage source (Vin2) positive pole, the 6th
Diode (D6) negative pole be connected to second switch pipe (S2) colelctor electrode, the 6th switching tube (S6) colelctor electrode, the tenth switching tube
(S10) colelctor electrode；7th diode (D7) negative pole be connected to the second DC input voitage source (Vin2) positive pole, the seven or two pole
Pipe (D7) positive pole be connected to the 3rd switching tube (S3) colelctor electrode, the 7th switching tube (S7) colelctor electrode, the 11st switching tube
(S11) colelctor electrode.
The connected mode of the bridge arm of the three-phase inverter is：
For the first structure：
(bridge arm 1) first switch pipe (S1) emitter stage be connected to second switch pipe (S2) emitter stage, the first diode
(D1) negative pole, the first filter inductance (L1) one end；4th diode (D4) positive pole be connected to the 3rd diode (D3) just
Pole, the 4th switching tube (S4) colelctor electrode, the second filter inductance (L2) one end；First filter inductance (L1) and the second filtered electrical
Sense (L2) the other end be connected together as one of threephase load end.(bridge arm 2) the 5th switching tube (S5) emitter stage be connected to
6th switching tube (S6) emitter stage, the 5th diode (D5) negative pole, the 3rd filter inductance (L3) one end；8th diode
(D8) positive pole be connected to the 7th diode (D7) positive pole, the 8th switching tube (S8) colelctor electrode, the 4th filter inductance (L4)
One end；Second filter inductance (L2) and the 3rd filter inductance (L3) the other end be connected together as the two of threephase load end.
(bridge arm 3) the 9th switching tube (S9) emitter stage be connected to the tenth switching tube (S10) emitter stage, the 9th diode (D9) it is negative
Pole, the 5th filter inductance (L5) one end；12nd diode (D12) positive pole be connected to the 11st diode (D11) positive pole,
12nd switching tube (S12) colelctor electrode, the 6th filter inductance (L6) one end；5th filter inductance (L5) and the 6th filtered electrical
Sense (L6) the other end be connected together as the three of threephase load end.
For second structure：
(bridge arm 1) first switch pipe (S1) emitter stage be connected to second switch pipe (S2) emitter stage, the first diode
(D1) negative pole, the first filter inductance (L1) one end；4th diode (D4) positive pole be connected to the 3rd switching tube (S3) collection
Electrode, the 4th switching tube (S4) colelctor electrode, the second filter inductance (L2) one end；First filter inductance (L1) and the second filtering
Inductance (L2) the other end be connected together as one of threephase load end.(bridge arm 2) the 5th switching tube (S5) emitter stage connection
In the 6th switching tube (S6) emitter stage, the 5th diode (D5) negative pole, the 3rd filter inductance (L3) one end；Eight or two pole
Pipe (D8) positive pole be connected to the 7th switching tube (S7) colelctor electrode, the 8th switching tube (S8) colelctor electrode, the 4th filter inductance
(L4) one end；Second filter inductance (L2) and the 3rd filter inductance (L3) the other end be connected together as threephase load end
Two.(bridge arm 3) the 9th switching tube (S9) emitter stage be connected to the tenth switching tube (S10) emitter stage, the 9th diode (D9)
Negative pole, the 5th filter inductance (L5) one end；12nd diode (D12) positive pole be connected to the 11st switching tube (S11)
Colelctor electrode, the 12nd switching tube (S12) colelctor electrode, the 6th filter inductance (L6) one end；5th filter inductance (L5) and the 6th
Filter inductance (L6) the other end be connected together as the three of threephase load end.
The distinctive five level modulations strategy of the three-phase inverter is：Modulating wave is three phase sine voltage signal, and carrier wave is two
Individual triangular wave, respectively：Peak-to-peak value Vin1-Vin2, biasing Vin2-Vin1/ 2 the first triangular wave, peak-to-peak value is Vin2, biasing Vin1/
2-Vin2The second triangular wave.
For A phases, in part of the sine wave more than the first triangular wave, switching tube S1Conducting, the one or three is less than in sine wave
The part of angle ripple, switching tube S1Shut-off；The first triangular wave is less than in sine wave and belong to the part of the positive half cycle of sine wave, switching tube
S2Conducting, the positive half-cycle portions of the first triangular wave, switching tube S are more than in sine wave negative half period and sine wave2Shut-off；In sine
The positive half cycle and sine wave of ripple are more than the negative half period part of the second triangular wave, switching tube S3Conducting, second is less than in sine wave
The part of triangular wave, switching tube S3Shut-off；In part of the sine wave less than the second triangular wave, switching tube S4Conducting is big in sine wave
In the part of the second triangular wave, switching tube S4Shut-off.
For B phases, in part of the sine wave more than the first triangular wave, switching tube S5Conducting, the one or three is less than in sine wave
The part of angle ripple, switching tube S5Shut-off；The first triangular wave is less than in sine wave and belong to the part of the positive half cycle of sine wave, switching tube
S6Conducting, the positive half-cycle portions of the first triangular wave, switching tube S are more than in sine wave negative half period and sine wave6Shut-off；In sine
The positive half cycle and sine wave of ripple are more than the negative half period part of the second triangular wave, switching tube S7Conducting, second is less than in sine wave
The part of triangular wave, switching tube S7Shut-off；In part of the sine wave less than the second triangular wave, switching tube S8Conducting is big in sine wave
In the part of the second triangular wave, switching tube S8Shut-off.
For C phases, in part of the sine wave more than the first triangular wave, switching tube S9Conducting, the one or three is less than in sine wave
The part of angle ripple, switching tube S9Shut-off；The first triangular wave is less than in sine wave and belong to the part of the positive half cycle of sine wave, switching tube
S10Conducting, the positive half-cycle portions of the first triangular wave, switching tube S are more than in sine wave negative half period and sine wave10Shut-off；Just
The positive half cycle and sine wave of string ripple are more than the negative half period part of the second triangular wave, switching tube S11Conducting, in sine wave less than the
The part of two triangular waves, switching tube S11Shut-off；In part of the sine wave less than the second triangular wave, switching tube S12Conducting, in sine
Ripple is more than the part of the second triangular wave, switching tube S12Shut-off.
The selecting method of three-phase dual input inverter switching device pipe：
For the first structure, switching tube can both select the insulated gate bipolar transistor with parasitic body diode
(IGBT) device, it is also possible to from the IGBT device without parasitic body diode.
For second structure, switching tube can only be selected without the IGBT device of parasitic body diode.
Beneficial effect：
When inverter of the invention is in any mode, one of upper bridge arm and lower bridge arm are anti-with certain diode in topology
To series connection, avoided from structure straight-through, improve reliability.As shown in Fig. 2 first switch pipe (S1), the 8th switching tube (S8)
Conducting.Now, for bridge arm 1, first switch pipe (S1) conducting, the first diode (D1), the second diode (D2) all end, and
And the 4th switching tube (S4) and the 4th diode (D4) differential concatenation, it is to avoid first switch pipe (S1) and the 4th switching tube (S4)
Possible straight-through risk；For bridge arm 2, the 8th switching tube (S8) conducting, the 7th diode (D7), the 8th diode (D8) all cut
Only, and the 5th switching tube (S5) and the 5th diode (D5) differential concatenation, it is to avoid the 5th switching tube (S5) and the 8th switching tube
(S8) possible straight-through risk.Other mode and B phase C phases are in this similarly.
The present invention utilizes dual input power supply and increased D2、D3、D6、D7、D10、D11And S2、S3、S6、S7、S10、S11Constitute many
Level is exported.System dual input source Vin1With Vin2Voltage is different, and purpose of the timesharing to inverter power supply is reached by control；
Instant invention overcomes the unbalanced problem of common three-phase multi-electrical level inverter breaker in middle tube load；
If Vin1By Vin2Obtained through Boost boostings, then a system output power part arises directly from Vin2, another part
Come from boosting unit, realize the single-stage conversion of Partial Power, not only reduce boosting unit capacity, and improve system
Efficiency.
Brief description of the drawings
Accompanying drawing 1 is the three-phase dual input inverter without bridge arm direct pass risk of the invention；
Accompanying drawing 2 filters preceding voltage u for the present invention in A phasesA1、B2=Vin1When equivalent circuit diagram；
Accompanying drawing 3 filters preceding voltage u for the present invention in A phasesA1、B2=Vin2When equivalent circuit diagram；
Accompanying drawing 4 filters preceding voltage u for the present invention in A phasesA1、B2=Vin1-Vin2When equivalent circuit diagram；
Accompanying drawing 5 filters preceding voltage u for the present invention in A phasesA1、B2Equivalent circuit diagram when=0；
Accompanying drawing 6 filters preceding voltage u for the present invention in A phasesA2、B1=-(Vin1-Vin2) when equivalent circuit diagram；
Accompanying drawing 7 filters preceding voltage u for the present invention in A phasesA2、B1=-Vin2When equivalent circuit diagram；
Accompanying drawing 8 filters preceding voltage u for the present invention in A phasesA2、B1=-Vin1When equivalent circuit diagram；
Accompanying drawing 9 is modulation principle schematic diagram of the invention；
Accompanying drawing 10 is A phases switching tube drive signal figure of the invention；
Accompanying drawing 11 is output simulation waveform of the invention.
Primary symbols explanation in accompanying drawing above：Vin1And Vin2Respectively the first DC input voitage source and the second direct current are defeated
Enter voltage source, S1、S2、S3、S4、S5、S6、S7、S8、S9、S10、S11、S12Respectively first, second, third, fourth, the 5th,
6th, the seven, the eight, the nine, the ten, the 11st, the 12nd switching tube, D1、D2、D3、D4、D5、D6、D7、D8、D9、D10、D11、D12
Respectively first, second, third, fourth, the five, the six, the seven, the eight, the nine, the ten, the 11st, the 12nd diode,
L1、L2、L3、L4、L5、L6Respectively first, second, third, fourth, the five, the 6th filter inductances.
Specific embodiment
Technical solution of the present invention is described in detail by taking the first structure (as shown in Figure 1a) as an example below.But this hair
Bright protection domain is not limited to the embodiment.Second structure (as shown in Figure 1 b) is with this similarly.
Embodiment：
It is as shown in Figure 1a that the three-phase dual input inverter circuit structure 4 without bridge arm direct pass risk includes：Two independent
DC input voitage source (Vin1~Vin2), 12 switching tube (S1~S12), 12 diode (D1~D12), six filtered electricals
Sense (L1~L6) and load.
The connected mode of the input power of the three-phase inverter is：Vin1Positive pole be connected to S1、S5、S9Colelctor electrode and
D4、D8、D12Negative pole；Vin1Negative pole be connected to Vin2Negative pole, S4Emitter stage, S8Emitter stage, S12Emitter stage and D1's
Positive pole, D5Positive pole, D9Positive pole.
Vin2Positive pole pass through six diode (D2、D3、D6、D7、D10、D11), six switching tube (S2、S3、S6、S7、S10、
S11) it is linked into circuit；D2Positive pole be connected to Vin2Positive pole, D2Negative pole be connected to S2Colelctor electrode；S3Emitter stage connection
In Vin2Positive pole, S3Colelctor electrode be connected to D3Negative pole；D6Positive pole be connected to Vin2Positive pole, D6Negative pole be connected to S6's
Colelctor electrode；S7Emitter stage be connected to Vin2Positive pole, S7Colelctor electrode be connected to D7Negative pole；D10Positive pole be connected to Vin2's
Positive pole, D10Negative pole be connected to S10Colelctor electrode；S11Emitter stage be connected to Vin2Positive pole, S11Colelctor electrode be connected to D11
Negative pole.Vin2Negative pole be connected to Vin1Negative pole, S4Emitter stage, S8Emitter stage, S12Emitter stage and D1Positive pole, D5
Positive pole, D9Positive pole.
The connected mode of the bridge arm of the three-phase inverter is：(bridge arm 1) S1Emitter stage be connected to S2Emitter stage, D1's
Negative pole, L1One end；D4Positive pole be connected to S3Positive pole, S4Colelctor electrode, L2One end；L1And L2The other end be connected to one
Rise as one of threephase load end.(bridge arm 2) S5Emitter stage be connected to S6Emitter stage, D5Negative pole, L3One end；D8Just
Pole is connected to S7Positive pole, S8Colelctor electrode, L4One end；L2And L3The other end be connected together as threephase load end it
Two.(bridge arm 3) S9Emitter stage be connected to S10Emitter stage, D9Negative pole, L5One end；D12Positive pole be connected to S11Just
Pole, S12Colelctor electrode, L6One end；L5And L6The other end be connected together as the three of threephase load end.
The distinctive Multilevel modulation strategy of the three-phase inverter is：Modulating wave is three phase sine voltage signal, and carrier wave is two
Bar triangular wave, respectively：Peak-to-peak value Vin1-Vin2, biasing Vin2-Vin1/ 2 the first triangular wave, peak-to-peak value is Vin2, biasing-Vin1/
2 the second triangular wave.
For A phases, in part of the sine wave more than the first triangular wave, switching tube S1Conducting, the one or three is less than in sine wave
The part of angle ripple, switching tube S1Shut-off；The first triangular wave is less than in sine wave and belong to the part of the positive half cycle of sine wave, switching tube
S2Conducting, the positive half-cycle portions of the first triangular wave, switching tube S are more than in sine wave negative half period and sine wave2Shut-off；In sine
The positive half cycle and sine wave of ripple are more than the negative half period part of the second triangular wave, switching tube S3Conducting, second is less than in sine wave
The part of triangular wave, switching tube S3Shut-off；In part of the sine wave less than the second triangular wave, switching tube S4Conducting is big in sine wave
In the part of the second triangular wave, switching tube S4Shut-off.
For B phases, in part of the sine wave more than the first triangular wave, switching tube S5Conducting, the one or three is less than in sine wave
The part of angle ripple, switching tube S5Shut-off；The first triangular wave is less than in sine wave and belong to the part of the positive half cycle of sine wave, switching tube
S6Conducting, the positive half-cycle portions of the first triangular wave, switching tube S are more than in sine wave negative half period and sine wave6Shut-off；In sine
The positive half cycle and sine wave of ripple are more than the negative half period part of the second triangular wave, switching tube S7Conducting, second is less than in sine wave
The part of triangular wave, switching tube S7Shut-off；In part of the sine wave less than the second triangular wave, switching tube S8Conducting is big in sine wave
In the part of the second triangular wave, switching tube S8Shut-off.
For C phases, in part of the sine wave more than the first triangular wave, switching tube S9Conducting, the one or three is less than in sine wave
The part of angle ripple, switching tube S9Shut-off；The first triangular wave is less than in sine wave and belong to the part of the positive half cycle of sine wave, switching tube
S10Conducting, the positive half-cycle portions of the first triangular wave, switching tube S are more than in sine wave negative half period and sine wave10Shut-off；Just
The positive half cycle and sine wave of string ripple are more than the negative half period part of the second triangular wave, switching tube S11Conducting, in sine wave less than the
The part of two triangular waves, switching tube S11Shut-off；In part of the sine wave less than the second triangular wave, switching tube S12Conducting, in sine
Ripple is more than the part of the second triangular wave, switching tube S12Shut-off.
Three-phase dual input inverter without bridge arm direct pass risk of the invention can export five kinds of level, below by taking A phases as an example
Explanation.Fig. 2 filters preceding voltage u for A phasesA1、B2=Vin1When equivalent circuit diagram；Fig. 3 filters preceding voltage u for A phasesA1, B2=Vin2When
Equivalent circuit diagram；Fig. 4 filters preceding voltage u for A phasesA1、B2=Vin1-Vin2When equivalent circuit diagram；Fig. 5 filters preceding voltage for A phases
uA1、B2Equivalent circuit diagram when=0；Fig. 6 filters preceding voltage u for A phasesA2、B1=-(Vin1-Vin2) when equivalent circuit diagram；Fig. 7 is
A phases filter preceding voltage uA2、B1=-Vin2When equivalent circuit diagram；Fig. 8 filters preceding voltage u for A phasesA2、B1=-Vin1When equivalent electric
Lu Tu.B phases, C phases and A are similar.
The high reliability operation mode of the three-phase inverter, by taking a mode of the A phases of the first structure as an example, illustrates such as
Under：
As shown in Fig. 2 S1、S8Conducting.Now, for bridge arm 1, S1Conducting, D1、D2All end, and S4With D4Reversely go here and there
Connection, it is to avoid S1And S4Possible straight-through risk；For bridge arm 2, S8Conducting, D7、D8All end, and S5With D5Differential concatenation,
Avoid S5And S8Possible straight-through risk.Other mode and B phase C phases are in this similarly.
It is checking effectiveness of the invention, carries out emulation experiment by taking accompanying drawing 1a topologys as an example, its modulation strategy such as Fig. 9 institutes
Show, three-phase reference voltage is handed over three triangular carriers cut respectively, produce three-phase bridge arm switch pipe drive signal as shown in Figure 10.
It is V in inputin1=180V, Vin2During=90V, inverter output voltage waveform is as shown in figure 11.
More than analyze for illustrating two kinds of level three-phases of dual input five of high reliability (without bridge arm direct pass risk) of the invention
Inverter operation principle and modulated process.
Claims (3)
1. high reliability (without bridge arm direct pass risk) three-phase dual input inverter topology, it is characterised in that：
For the first topology：
DC input voitage source (Vin1) positive pole be connected to first switch pipe (S1), the 5th switching tube (S5), the 9th switching tube
(S9) colelctor electrode and the 4th diode (D4), the 8th diode (D8), the 12nd diode (D12) negative pole；First direct current is defeated
Enter voltage source (Vin1) negative pole be connected to the second DC input voitage source (Vin2) negative pole, the 4th switching tube (S4) transmitting
Pole, the 8th switching tube (S8) emitter stage, the 12nd switching tube (S12) emitter stage and the first diode (D1) positive pole, the 5th
Diode (D5) positive pole, the 9th diode (D9) positive pole.
Direct current input source (Vin2) positive pole pass through six diode (D2、D3、D6、D7、D10、D11), six switching tube (S2、S3、S6、
S7、S10、S11) it is linked into circuit；Second diode (D2) positive pole be connected to the second DC input voitage source (Vin2) positive pole,
Second diode (D2) negative pole be connected to second switch pipe (S2) colelctor electrode；3rd switching tube (S3) emitter stage be connected to
Second DC input voitage source (Vin2) positive pole, the 3rd switching tube (S3) colelctor electrode be connected to the 3rd diode (D3) it is negative
Pole；6th diode (D6) positive pole be connected to the second DC input voitage source (Vin2) positive pole, the 6th diode (D6) it is negative
Pole is connected to the 6th switching tube (S6) colelctor electrode；7th switching tube (S7) emitter stage be connected to the second DC input voitage source
(Vin2) positive pole, the 7th switching tube (S7) colelctor electrode be connected to the 7th diode (D7) negative pole；Tenth diode (D10)
Positive pole is connected to the second DC input voitage source (Vin2) positive pole, the tenth diode (D10) negative pole be connected to the tenth switching tube
(S10) colelctor electrode；11st switching tube (S11) emitter stage be connected to the second DC input voitage source (Vin2) positive pole,
11 switching tube (S11) colelctor electrode be connected to the 11st diode (D11) negative pole.Second DC input voitage source (Vin2)
Negative pole is connected to the first DC input voitage source (Vin1) negative pole, the 4th switching tube (S4) emitter stage, the 8th switching tube (S8)
Emitter stage, the 12nd switching tube (S12) emitter stage and the first diode (D1) positive pole, the 5th diode (D5) positive pole,
9th diode (D9) positive pole.
(bridge arm 1) first switch pipe (S1) emitter stage be connected to second switch pipe (S2) emitter stage, the first diode (D1)
Negative pole, the first filter inductance (L1) one end；4th diode (D4) positive pole be connected to the 3rd diode (D3) positive pole,
Four switching tube (S4) colelctor electrode, the second filter inductance (L2) one end；First filter inductance (L1) and the second filter inductance (L2)
The other end be connected together as one of threephase load end.(bridge arm 2) the 5th switching tube (S5) emitter stage be connected to the 6th
Switching tube (S6) emitter stage, the 5th diode (D5) negative pole, the 3rd filter inductance (L3) one end；8th diode (D8)
Positive pole be connected to the 7th diode (D7) positive pole, the 8th switching tube (S8) colelctor electrode, the 4th filter inductance (L4) one
End；Second filter inductance (L2) and the 3rd filter inductance (L3) the other end be connected together as the two of threephase load end.(bridge
Arm 3) the 9th switching tube (S9) emitter stage be connected to the tenth switching tube (S10) emitter stage, the 9th diode (D9) negative pole,
5th filter inductance (L5) one end；12nd diode (D12) positive pole be connected to the 11st diode (D11) positive pole,
12 switching tube (S12) colelctor electrode, the 6th filter inductance (L6) one end；5th filter inductance (L5) and the 6th filter inductance
(L6) the other end be connected together as the three of threephase load end.
For second topology：
DC input voitage source (Vin1) connected mode is identical with the first.
Direct current input source (Vin2) positive pole pass through two diode (D6、D7), six switching tube (S2、S3、S6、S7、S10、S11) connect
Enter to circuit；6th diode (D6) positive pole be connected to the second DC input voitage source (Vin2) positive pole, the 6th diode
(D6) negative pole be connected to second switch pipe (S2) colelctor electrode, the 6th switching tube (S6) colelctor electrode, the tenth switching tube (S10)
Colelctor electrode；7th diode (D7) negative pole be connected to the second DC input voitage source (Vin2) positive pole, the 7th diode (D7)
Positive pole be connected to the 3rd switching tube (S3) colelctor electrode, the 7th switching tube (S7) colelctor electrode, the 11st switching tube (S11)
Colelctor electrode.
(bridge arm 1) first switch pipe (S1) emitter stage be connected to second switch pipe (S2) emitter stage, the first diode (D1)
Negative pole, the first filter inductance (L1) one end；4th diode (D4) positive pole be connected to the 3rd switching tube (S3) colelctor electrode,
4th switching tube (S4) colelctor electrode, the second filter inductance (L2) one end；First filter inductance (L1) and the second filter inductance
(L2) the other end be connected together as one of threephase load end.(bridge arm 2) the 5th switching tube (S5) emitter stage be connected to
Six switching tube (S6) emitter stage, the 5th diode (D5) negative pole, the 3rd filter inductance (L3) one end；8th diode
(D8) positive pole be connected to the 7th switching tube (S7) colelctor electrode, the 8th switching tube (S8) colelctor electrode, the 4th filter inductance (L4)
One end；Second filter inductance (L2) and the 3rd filter inductance (L3) the other end be connected together as the two of threephase load end.
(bridge arm 3) the 9th switching tube (S9) emitter stage be connected to the tenth switching tube (S10) emitter stage, the 9th diode (D9) it is negative
Pole, the 5th filter inductance (L5) one end；12nd diode (D12) positive pole be connected to the 11st switching tube (S11) current collection
Pole, the 12nd switching tube (S12) colelctor electrode, the 6th filter inductance (L6) one end；5th filter inductance (L5) and the 6th filtering
Inductance (L6) the other end be connected together as the three of threephase load end.
2. the distinctive five level modulations strategy of dual input three-phase inverter, it is characterised in that：Modulating wave is believed for three phase sine voltage
Number, carrier wave is two triangular waves, respectively：Peak-to-peak value Vin1-Vin2, biasing Vin2-Vin1/ 2 the first triangular wave, peak-to-peak value is
Vin2, biasing-Vin1/ 2 the second triangular wave.
For A phases, in part of the sine wave more than the first triangular wave, switching tube S1Conducting, in sine wave less than the first triangular wave
Part, switching tube S1Shut-off；The first triangular wave is less than in sine wave and belong to the part of the positive half cycle of sine wave, switching tube S2Conducting,
It is more than the positive half-cycle portions of the first triangular wave, switching tube S in sine wave negative half period and sine wave2Shut-off；In sine wave just
Half cycle and sine wave are more than the negative half period part of the second triangular wave, switching tube S3Conducting, the second triangular wave is less than in sine wave
Part, switching tube S3Shut-off；In part of the sine wave less than the second triangular wave, switching tube S4Conducting, second is more than in sine wave
The part of triangular wave, switching tube S4Shut-off.
For B phases, in part of the sine wave more than the first triangular wave, switching tube S5Conducting, in sine wave less than the first triangular wave
Part, switching tube S5Shut-off；The first triangular wave is less than in sine wave and belong to the part of the positive half cycle of sine wave, switching tube S6Conducting,
It is more than the positive half-cycle portions of the first triangular wave, switching tube S in sine wave negative half period and sine wave6Shut-off；In sine wave just
Half cycle and sine wave are more than the negative half period part of the second triangular wave, switching tube S7Conducting, the second triangular wave is less than in sine wave
Part, switching tube S7Shut-off；In part of the sine wave less than the second triangular wave, switching tube S8Conducting, second is more than in sine wave
The part of triangular wave, switching tube S8Shut-off.
For C phases, in part of the sine wave more than the first triangular wave, switching tube S9Conducting, in sine wave less than the first triangular wave
Part, switching tube S9Shut-off；The first triangular wave is less than in sine wave and belong to the part of the positive half cycle of sine wave, switching tube S10Lead
It is logical, it is more than the positive half-cycle portions of the first triangular wave, switching tube S in sine wave negative half period and sine wave10Shut-off；In sine wave
Positive half cycle and sine wave are more than the negative half period part of the second triangular wave, switching tube S11Conducting, the second triangle is less than in sine wave
The part of ripple, switching tube S11Shut-off；In part of the sine wave less than the second triangular wave, switching tube S12Conducting, is more than in sine wave
The part of the second triangular wave, switching tube S12Shut-off.
3. the selecting method of three-phase dual input inverter switching device pipe：
For the first structure, switching tube can both select the insulated gate bipolar transistor (IGBT) with parasitic body diode
Device, it is also possible to from the IGBT device without parasitic body diode.
For second structure, switching tube can only be selected without the IGBT device of parasitic body diode.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448924A (en) * | 2018-04-04 | 2018-08-24 | 南京航空航天大学 | One group of dual input bidirectional cell and five level three-phase DC-AC topologys race of highly reliable dual input |
| CN108448884A (en) * | 2018-04-04 | 2018-08-24 | 南京航空航天大学 | Two kinds of failure fault-tolerance approaches of dual input DC-AC converters |
| CN108448925A (en) * | 2018-04-04 | 2018-08-24 | 南京航空航天大学 | The two-way inverter of high reliability high energy efficiency dual input |
| CN110149068A (en) * | 2019-04-24 | 2019-08-20 | 南京航空航天大学 | A kind of double Buck full-bridge inverters of aspergillus ficuum three-phase and its control strategy |
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| EP2110939A1 (en) * | 2008-04-18 | 2009-10-21 | ABB Research LTD | Inverter and method for controlling an inverter with flying capacitors |
| CN101902142A (en) * | 2010-07-26 | 2010-12-01 | 南京航空航天大学 | Diode clamping five-level dual buck half-bridge inverter |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2110939A1 (en) * | 2008-04-18 | 2009-10-21 | ABB Research LTD | Inverter and method for controlling an inverter with flying capacitors |
| CN101902142A (en) * | 2010-07-26 | 2010-12-01 | 南京航空航天大学 | Diode clamping five-level dual buck half-bridge inverter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448924A (en) * | 2018-04-04 | 2018-08-24 | 南京航空航天大学 | One group of dual input bidirectional cell and five level three-phase DC-AC topologys race of highly reliable dual input |
| CN108448884A (en) * | 2018-04-04 | 2018-08-24 | 南京航空航天大学 | Two kinds of failure fault-tolerance approaches of dual input DC-AC converters |
| CN108448925A (en) * | 2018-04-04 | 2018-08-24 | 南京航空航天大学 | The two-way inverter of high reliability high energy efficiency dual input |
| CN108448924B (en) * | 2018-04-04 | 2021-05-14 | 南京航空航天大学 | A group of dual-input bidirectional units and dual-input five-level three-phase inverter topology family |
| CN110149068A (en) * | 2019-04-24 | 2019-08-20 | 南京航空航天大学 | A kind of double Buck full-bridge inverters of aspergillus ficuum three-phase and its control strategy |
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