CN104660078B - Three-phase Cuk voltage rising and reducing three-electric level inverter - Google Patents
Three-phase Cuk voltage rising and reducing three-electric level inverter Download PDFInfo
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- CN104660078B CN104660078B CN201510020561.2A CN201510020561A CN104660078B CN 104660078 B CN104660078 B CN 104660078B CN 201510020561 A CN201510020561 A CN 201510020561A CN 104660078 B CN104660078 B CN 104660078B
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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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Abstract
The invention discloses a three-phase Cuk voltage rising and reducing three-electric level inverter. The circuit mode comprises a DC bus, switch tubes, diodes, inductors and capacitors. The inverter can be applied to a voltage rising and reducing occasion under the condition that a transformer or a forestage DC converter is not needed, is small in size, high in efficiency and low in cost, can realize that output voltage amplitude value is greater or smaller than input voltage amplitude value, is large in output voltage range, and high in utilization ratio of maximal DC voltage, requires DC bus with low voltage under the condition that requirements of same three-phase loading or three-phase grid are met, and has common mode inhibiting ability; the voltage stress of switch tubes is half of that of conventional voltage rising and reducing inverters of three-phase Cuk inverters, and the like; the inverter is more suitable for being applied to middle-high voltage occasions.
Description
Technical field
The present invention relates to the inverter of converters technical field, more particularly to a kind of three-phase Cuk bucks
Type three-level inverter.
Background technology
Used as a kind of power electronic equipment, its basic role is that direct-current input power supplying is converted into alternating current power supply to inverter,
Meet load or the burden requirement of electrical network.Wherein single-phase inverter is mainly used in middle low power occasion, simple structure, cost compared with
It is low；And three-phase inverter is due to its construction features, it is adaptable to more large-power occasions, be widely used in grid-connected, Motor drive,
The various industrial occasions such as airplane power source.
Conventional three-phase inverter mainly includes three-phase semi-bridge type two-level inverter topology, three level of three-phase neutral-point-clamped type
The topologys such as inverter, its common feature are that output voltage amplitude is less than input voltage, belong to voltage-dropping type inverter.And above-mentioned blood pressure lowering
Type inverter generally requires DC bus-bar voltage and is more than or equal toOutput AC voltage amplitude again, is suitable only for applying in exchange
Output voltage amplitude is less than or equal toThe voltage-dropping type occasion of times DC input voitage amplitude；In practical application, in loading condition
In the big occasion of complicated, output voltage amplitude claimed range, especially in buck occasion, inverter need connection transformer or
Person's prime DC converter, adjusts output voltage amplitude, meets threephase load or the different voltage requirements of electrical network.However, becoming
The access of depressor or prime DC converter can also cause the increase of inverter volume, cost to increase, energy conversion efficiency reduction
The problems such as.Meanwhile, in application process, it is high that switching tube high frequency break-make also results in powder inverter common-mode voltage to inverter without transformer
Frequency changes, and causes common mode problem in various commercial Applications such as grid-connected, Motor drive, affect system safe and reliable operation,
Personal safety is threatened even.Thus, need Three phase voltage boosting/reducing inverter badly and solve the above problems.
Chinese Patent Application No. 201410020413.6, the non-isolated grid-connected generating of entitled single-stage boost inverter
System and its control method, the patent application introduce on the basis of conventional three-phase semi-bridge type two-level inverter coupling inductance without
Source network, the power supply of inverter and main circuit are coupled, with reference to the control program which is announced, while realizing stepping functions
Suppression common mode electric current.However, the inverter scheme that this application case is proposed belongs to two-level inverter, which is limited in high voltage appearance
The application of occasion.The article A single-stage three- that Darwish et al. is delivered in IEEE GCC meetings in 2013
Propose in phase DC/AC inverter based on Cuk converter for PV application that one kind is based on
The three-phase single-level formula inverter of Cuk DC converters, the inverter output voltage amplitude can be more than or less than input direct-current
Voltage magnitude and have preferable common mode inhibition capacity；But the inverter belongs to two-level inverter, in high voltage transformation of electrical energy
, there is the defects such as switch tube voltage stress is high, harmonic wave of output voltage content is high, loss is big in occasion.
The content of the invention
In order to solve above-mentioned problem, it is an object of the invention to provide a kind of output voltage range is big, Neng Goushi
Merge the three-phase buck-boost type three-level inverter for possessing common mode inhibition capacity for buck applied field.
In order to realize foregoing invention purpose, the present invention is to adopt the following technical scheme that：
A kind of three-phase Cuk buck-boost type three-level inverters, its first circuit form include dc bus, 12 open
Guan Guan, six diodes, six inductance and nine electric capacity；
The P ends of dc bus pass through the first inductance L1With the first electric capacity C1One end, first switch pipe S1One end be connected；
First electric capacity C1The other end and the second electric capacity C2One end, the first diode D1One end, the second diode D2One end phase
Even；First switch pipe S1The other end and second switch pipe S2One end, the first diode D1The other end be connected；Second switch
Pipe S2The other end be connected with the N-terminal of dc bus；Second electric capacity C2The other end and the second inductance L2One end, the 3rd switch
Pipe S3One end be connected；3rd switching tube S3The other end and the 4th switching tube S4One end, the second diode D2Other end phase
Even；4th switching tube S4The other end be connected with the N-terminal of dc bus；Second inductance L2The other end and the 7th electric capacity C7One
The A of end, threephase load or three phase network is connected to point A；
The P ends of dc bus pass through the 3rd inductance L3With the 3rd electric capacity C3One end, the 5th switching tube S5One end be connected；
3rd electric capacity C3The other end and the 4th electric capacity C4One end, the 3rd diode D3One end, the 4th diode D4One end phase
Even；5th switching tube S5The other end and the 6th switching tube S6One end, the 3rd diode D3The other end be connected；6th switch
Pipe S6The other end be connected with the N-terminal of dc bus；4th electric capacity C4The other end and the 4th inductance L4One end, the 7th switch
Pipe S7One end be connected；7th switching tube S7The other end and the 8th switching tube S8One end, the 4th diode D4Other end phase
Even；8th switching tube S8The other end be connected with the N-terminal of dc bus；4th inductance L4The other end and the 8th electric capacity C8One
The B of end, threephase load or three phase network is connected to point B；
The P ends of dc bus pass through the 5th inductance L5With the 5th electric capacity C5One end, the 9th switching tube S9One end be connected；
5th electric capacity C5The other end and the 6th electric capacity C6One end, the 5th diode D5One end, the 6th diode D6One end phase
Even；9th switching tube S9The other end and the tenth switching tube S10One end, the 5th diode D5The other end be connected；Tenth switch
Pipe S10The other end be connected with the N-terminal of dc bus；6th electric capacity C6The other end and the 6th inductance L6One end, the 11st open
Close pipe S11One end be connected；11st switching tube S11The other end and twelvemo close pipe S12One end, the 6th diode D6's
The other end is connected；Twelvemo closes pipe S12The other end be connected with the N-terminal of dc bus；6th inductance L6The other end and the 9th
Electric capacity C9The C of one end, threephase load or three phase network be connected to point C；
7th electric capacity C7The other end, the 8th electric capacity C8The other end and the 9th electric capacity C9The other end be connected to point M, three
Phase load or three phase network are connected to point O.
Further, in the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention
On the basis of, the improvement of one of following measures is taken, to strengthen common mode inhibition capacity：
(1) by the 7th electric capacity C7, the 8th electric capacity C8With the 9th electric capacity C9Junction point M be connected with the N-terminal of dc bus；
(2) the first suppression electric capacity C for connecting is accessed between the P ends of dc bus and N-terminalt1Suppress electric capacity C with secondt2；
First suppresses electric capacity Ct1Suppress electric capacity C with secondt2Point H is connected to, suppresses electric capacity C by firstt1, second suppress electric capacity Ct2Company
Contact H and the 7th electric capacity C7, the 8th electric capacity C8With the 9th electric capacity C9Junction point M be connected.
Further, in the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention
On the basis of, or in the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention and adopt
On the basis of taking enhancing common mode inhibition capacity measure (1), following measures are taken to reduce the quantity of circuit breaker in middle pipe：
The the first derided capacitors C for connecting is accessed between the P ends of dc bus and N-terminaln1With the second derided capacitors Cn2, the
One derided capacitors Cn1With the second derided capacitors Cn2Point J is connected to, wherein any one corresponding inductance, electric capacity, diode is substituted
And switching tube, and the corresponding load or electrical network are connected to into the first derided capacitors Cn1With the second derided capacitors Cn2Junction point
J；A phases include：First inductance L1With the second inductance L2, the first electric capacity C1With the second electric capacity C2, the first diode D1With the two or two pole
Pipe D2, first switch pipe S1, second switch pipe S2, the 3rd switching tube S3With the 4th switching tube S4；B phases include：3rd inductance L3With
4th inductance L4, the 3rd electric capacity C3With the 4th electric capacity C4, the 3rd diode D3With the 4th diode D4, the 5th switching tube S5, the 6th
Switching tube S6, the 7th switching tube S7With the 8th switching tube S8；C phases include：5th inductance L5With the 6th inductance L6, the 5th electric capacity C5With
6th electric capacity C6, the 5th diode D5With the 6th diode D6, the 9th switching tube S9, the tenth switching tube S10, the 11st switching tube S11
Pipe S is closed with twelvemo12。
Present invention also offers a kind of second circuit form of three-phase Cuk buck-boost type three-level inverters, it includes
Dc bus, 12 switching tubes, six inductance and nine electric capacity；
P ' the ends of dc bus are by the first inductance L1' and the first electric capacity C1' one end, first switch pipe S1' one end phase
Even；First electric capacity C1' the other end and the second inductance L2' one end, the 3rd switching tube S3' one end be connected；First switch pipe
S1' the other end and second switch pipe S2' one end, the second electric capacity C2' one end be connected；Second switch pipe S2' the other end
It is connected with the N ' ends of dc bus；Second electric capacity C2' the other end and the 3rd switching tube S3' the other end, the 4th switching tube S4′
One end be connected；4th switching tube S4' the N ' ends of the other end and dc bus be connected；Second inductance L2' the other end and the 7th
Electric capacity C7' the A of one end, threephase load or three phase network be connected to point A '；
P ' the ends of dc bus are by the 3rd inductance L3' and the 3rd electric capacity C3' one end, the 5th switching tube S5' one end phase
Even；3rd electric capacity C3' the other end and the 4th inductance L4' one end, the 7th switching tube S7' one end be connected；5th switching tube
S5' the other end and the 6th switching tube S6' one end, the 4th electric capacity C4' one end be connected；6th switching tube S6' the other end with
N ' the ends of dc bus are connected；4th electric capacity C4' the other end and the 7th switching tube S7' the other end, the 8th switching tube S8'
One end is connected；8th switching tube S8' the N ' ends of the other end and dc bus be connected；4th inductance L4' the other end it is electric with the 8th
Hold C8' the B of one end, threephase load or three phase network be connected to point B '；
P ' the ends of dc bus are by the 5th inductance L5' and the 5th electric capacity C5' one end, the 9th switching tube S9' one end phase
Even；5th electric capacity C5' the other end and the 6th inductance L6' one end, the 11st switching tube S11' one end be connected；9th switch
Pipe S9' the other end and the tenth switching tube S10' one end, the 6th electric capacity C6' one end be connected；Tenth switching tube S10' it is another
Hold and be connected with the N ' ends of dc bus；6th electric capacity C6' the other end and the 11st switching tube S11' the other end, twelvemo
Close pipe S12' one end be connected；Twelvemo closes pipe S12' the N ' ends of the other end and dc bus be connected；6th inductance L6' it is another
One end and the 9th electric capacity C9' the C of one end, threephase load or three phase network be connected to point C '；
7th electric capacity C7' the other end, the 8th electric capacity C8' the other end and the 9th electric capacity C9' the other end be connected to a little
M ', threephase load or three phase network are connected to point O '.
Further, in a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention
On the basis of, the improvement of one of following two measures is taken, to strengthen common mode inhibition capacity：
(3) by the 7th electric capacity C7', the 8th electric capacity C8' and the 9th electric capacity C9' the N ' ends of junction point M ' and dc bus connect
Connect；
(4) dc bus P ' end with access between N ' ends connect first suppression electric capacity Ct1' and the second suppression electric capacity
Ct2', first suppresses electric capacity Ct1' suppress electric capacity C with secondt2' point H ' is connected to, suppress electric capacity C by firstt1', second suppress electricity
Hold Ct2' junction point H ' and the 7th electric capacity C7', the 8th electric capacity C8' and the 9th electric capacity C9' junction point M ' be connected.
Further, in a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention
On the basis of, or in a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention and adopt
On the basis of taking enhancing common mode inhibition capacity measure (3), reduce contactor quantity using following measures：
The P ' ends of dc bus with the first derided capacitors C for connecting is accessed between N ' endsn1' and the second derided capacitors
Cn2', the first derided capacitors Cn1' and the second derided capacitors Cn2' point J ' is connected to, substitute wherein any one corresponding inductance, electricity
Hold and switching tube, and the corresponding load or electrical network are connected to into the first derided capacitors Cn1' and the second derided capacitors Cn2' company
Contact J '；A phases include：First inductance L1' and the second inductance L2', the first electric capacity C1' and the second electric capacity C2', first switch pipe S1′、
Second switch pipe S2', the 3rd switching tube S3' and the 4th switching tube S4′；B phases include：3rd inductance L3' and the 4th inductance L4', the
Three electric capacity C3' and the 4th electric capacity C4', the 5th switching tube S5', the 6th switching tube S6', the 7th switching tube S7' and the 8th switching tube
S8′；C phases include：5th inductance L5' and the 6th inductance L6', the 5th electric capacity C5' and the 6th electric capacity C6', the 9th switching tube S9',
Ten switching tube S10', the 11st switching tube S11' and twelvemo pass pipe S12′。
Due to adopting above-mentioned technical proposal, compared with prior art, the invention has the beneficial effects as follows：
1st, compared with conventional three-phase inverter, inverter proposed by the present invention can become without the need for transformator or prime direct current
Buck-boost type occasion, small volume, efficiency high, low cost are applied in the case of parallel operation；
2nd, compared with conventional three-phase inverter, inverter proposed by the present invention belongs to voltage boosting/reducing inverter, it is possible to achieve
Output voltage amplitude is more than or less than input voltage amplitude, and output voltage range is big.Maximum DC voltage utilization rate is high, full
In the case that the same threephase load of foot or three phase network are required, the DC bus-bar voltage of needs is low；
3rd, compared with conventional three-phase inverter, inverter proposed by the present invention possesses common mode inhibition capacity；
4th, compared with three-phase Cuk type two-level inverters, inverter proposed by the present invention is three-level inverter, switching tube
Voltage stress is the half of the tradition buck-boost inverter such as three-phase Cuk two-level inverters, is more suitable for being applied to high voltage appearance field
Close.
Description of the drawings
Fig. 1 be the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention point M with
Circuit theory diagrams in the case of the N-terminal of dc bus is not connected；
Fig. 2 be the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention point M with
The N-terminal of dc bus circuit theory diagrams under connection；
Fig. 3 is the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention in direct current
The the first suppression electric capacity C for connecting is accessed between the P ends of bus and N-terminalt1Suppress electric capacity C with secondt2, first suppresses electric capacity Ct1With
Second suppresses electric capacity Ct2Point H is connected to, suppresses electric capacity C by firstt1, second suppress electric capacity Ct2Junction point H and the 7th electric capacity
C7, the 8th electric capacity C8, the 9th electric capacity C9Junction point M be connected in the case of circuit theory diagrams；
Fig. 4 is the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention in direct current
The the first derided capacitors C for connecting is accessed between the P ends of bus and N-terminaln1With the second derided capacitors Cn2, the first derided capacitors Cn1With
Second derided capacitors Cn2Point J is connected to, wherein A corresponding inductance, electric capacity and diode, switching tube are removed, and by the phase
Corresponding load or electrical network are connected to the first derided capacitors Cn1With the second derided capacitors Cn2Junction point J, and electric capacity midpoint M with it is straight
Circuit theory diagrams in the case of the N-terminal of stream bus is not connected；
Fig. 5 is the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention in direct current
The the first derided capacitors C for connecting is accessed between the P ends of bus and N-terminaln1With the second derided capacitors Cn2, the first derided capacitors Cn1With
Second derided capacitors Cn2Point J is connected to, wherein A corresponding inductance, electric capacity and diode, switching tube are removed, and by the phase
Corresponding load or electrical network are connected to the first derided capacitors Cn1With the second derided capacitors Cn2Junction point J, and electric capacity midpoint M with it is straight
The N-terminal of stream bus circuit theory diagrams under connection；
Fig. 6 is a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention in point M '
Circuit theory diagrams in the case of not connected with the N ' ends of dc bus；
Fig. 7 is a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention in point M '
The circuit theory diagrams under connection are held with the N ' of dc bus；
Fig. 8 is a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention in direct current
Bus P ' end with access between N ' ends connect first suppression electric capacity Ct1' and the second suppression electric capacity Ct2', first suppresses electric capacity
Ct1' suppress electric capacity C with secondt2' point H ' is connected to, suppress electric capacity C by firstt1', second suppress electric capacity Ct2' junction point H ' with
7th electric capacity C7', the 8th electric capacity C8' and the 9th electric capacity C9' junction point M ' be connected in the case of circuit theory diagrams；
Fig. 9 is a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention in direct current
P ' the ends of bus with the first derided capacitors C for connecting is accessed between N ' endsn1' and the second derided capacitors Cn2', the first derided capacitors
Cn1' and the second derided capacitors Cn2' point J ' is connected to, A phase inductances, electric capacity, switching tube are removed, and by the corresponding load
Or electrical network is connected to the first derided capacitors Cn1' and the second derided capacitors Cn2' junction point J ', and electric capacity midpoint M ' and dc bus
N ' ends it is not connected in the case of circuit theory diagrams；
Figure 10 is a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention in direct current
P ' the ends of bus with the first derided capacitors C for connecting is accessed between N ' endsn1' and the second derided capacitors Cn2', the first derided capacitors
Cn1' and the second derided capacitors Cn2' point J ' is connected to, A phase inductances, electric capacity, switching tube are removed, and by the corresponding load
Or electrical network is connected to the first derided capacitors Cn1' and the second derided capacitors Cn2' junction point J ', and electric capacity midpoint M ' and dc bus
N ' ends circuit theory diagrams under connection.
Specific embodiment
Specific description in detail is made further to the specific embodiment of the present invention below in conjunction with the accompanying drawings.
In the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention shown in Fig. 1, can
To see that the circuit form is made up of dc bus, 12 switching tubes, six diodes, six inductance and nine electric capacity, its
It is characterised by：
The P ends of dc bus pass through the first inductance L1With the first electric capacity C1One end, first switch pipe S1One end be connected,
First electric capacity C1The other end and the second electric capacity C2One end, the first diode D1One end, the second diode D2One end phase
Even, first switch pipe S1The other end and second switch pipe S2One end, the first diode D1The other end be connected, second switch
Pipe S2The other end be connected with the N-terminal of dc bus, the second electric capacity C2The other end and the second inductance L2One end, the 3rd switch
Pipe S3One end be connected, the 3rd switching tube S3The other end and the 4th switching tube S4One end, the second diode D2Other end phase
Even, the 4th switching tube S4The other end be connected with the N-terminal of dc bus, the second inductance L2The other end and the 7th electric capacity C7One
The A of end, threephase load or electrical network is connected to point A；
The P ends of dc bus pass through the 3rd inductance L3With the 3rd electric capacity C3One end, the 5th switching tube S5One end be connected,
3rd electric capacity C3The other end and the 4th electric capacity C4One end, the 3rd diode D3One end, the 4th diode D4One end phase
Even, the 5th switching tube S5The other end and the 6th switching tube S6One end, the 3rd diode D3The other end be connected, the 6th switch
Pipe S6The other end be connected with the N-terminal of dc bus, the 4th electric capacity C4The other end and the 4th inductance L4One end, the 7th switch
Pipe S7One end be connected, the 7th switching tube S7The other end and the 8th switching tube S8One end, the 4th diode D4Other end phase
Even, the 8th switching tube S8The other end be connected with the N-terminal of dc bus, the 4th inductance L4The other end and the 8th electric capacity C8One
The B of end, threephase load or electrical network is connected to point B；
The P ends of dc bus pass through the 5th inductance L5With the 5th electric capacity C5One end, the 9th switching tube S9One end be connected,
5th electric capacity C5The other end and the 6th electric capacity C6One end, the 5th diode D5One end, the 6th diode D6One end phase
Even, the 9th switching tube S9The other end and the tenth switching tube S10One end, the 5th diode D5The other end be connected, the tenth switch
Pipe S10The other end be connected with the N-terminal of dc bus, the 6th electric capacity C6The other end and the 6th inductance L6One end, the 11st open
Close pipe S11One end be connected, the 11st switching tube S11The other end and twelvemo close pipe S12One end, the 6th diode D6's
The other end is connected, and twelvemo closes pipe S12The other end be connected with the N-terminal of dc bus, the 6th inductance L6The other end and the 9th
Electric capacity C9The C of one end, threephase load or electrical network be connected to point C；
7th electric capacity C7The other end, the 8th electric capacity C8The other end and the 9th electric capacity C9The other end be connected to point M, three
Phase load or three phase network are connected to point O.
Substantially, the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention be
On the basis of three-phase Cuk type two-level inverters, the tri-level circuit form constructed using diode clamping circuit.The present invention is proposed
The first circuit form of inverter is big in holding conventional three-phase Cuk type two-level inverter output AC voltages amplitude range,
While DC input voitage amplitude feature being more than or less than, the voltage stress that its switching tube bears is only conventional three-phase
The half of Cuk type two-level inverters, is more applicable for high voltage appearance occasion.
On the basis of the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention,
As needed, the improvement of one of following two measures is may also take on, to strengthen common mode inhibition capacity：
(1) by the 7th electric capacity C7, the 8th electric capacity C8With the 9th electric capacity C9Junction point M be connected with dc bus N-terminal, such as Fig. 2
It is shown；
(2) the first suppression electric capacity C for connecting is accessed between dc bus P ends and N-terminalt1Suppress electric capacity C with secondt2, the
One suppresses electric capacity Ct1Suppress electric capacity C with secondt2H points are connected to, suppress electric capacity C by firstt1, second suppress electric capacity Ct2Connection
Point H and the 7th electric capacity C7, the 8th electric capacity C8, the 9th electric capacity C9Junction point M be connected, as shown in Figure 3.
On the basis of the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention,
As needed, following measures are taken to reduce contactor pipe quantity：First for connecting is accessed between dc bus P ends and N-terminal
Derided capacitors Cn1With the second derided capacitors Cn2, the first derided capacitors Cn1With the second derided capacitors Cn2Point J is connected to, is substituted wherein
Any one corresponding inductance, electric capacity, diode and switching tube, and the corresponding load or electrical network are connected to into the first partial pressure electricity
Hold Cn1With the second derided capacitors Cn2Junction point J；A phases include：First inductance L1With the second inductance L2, the first electric capacity C1With second
Electric capacity C2, the first diode D1With the second diode D2, first switch pipe S1, second switch pipe S2, the 3rd switching tube S3With the 4th
Switching tube S4；B phases include：3rd inductance L3With the 4th inductance L4, the 3rd electric capacity C3With the 4th electric capacity C4, the 3rd diode D3With
Four diode D4, the 5th switching tube S5, the 6th switching tube S6, the 7th switching tube S7With the 8th switching tube S8；C phases include：5th is electric
Sense L5With the 6th inductance L6, the 5th electric capacity C5With the 6th electric capacity C6, the 5th diode D5With the 6th diode D6, the 9th switching tube
S9, the tenth switching tube S1011st switching tube S11Pipe S is closed with twelvemo12。
Technical scheme its improvement after is illustrated to substitute A phases with reference to Fig. 4：1) a kind of three-phase Cuk buck-boost types three are electric
Flat inverter, it includes dc bus, eight switching tubes, four diodes, four inductance and nine electric capacity；
First derided capacitors C of the P ends of dc bus by series connectionn1With the second derided capacitors Cn2The N of connection dc bus
End, the first derided capacitors Cn1With the second derided capacitors Cn2Junction point J and the 7th electric capacity C7One end, threephase load or three-phase electricity
The A of net is connected to point A；
The P ends of dc bus pass through the 3rd inductance L3With the 3rd electric capacity C3One end, the 5th switching tube S5One end be connected,
3rd electric capacity C3The other end and the 4th electric capacity C4One end, the 3rd diode D3One end, the 4th diode D4One end phase
Even, the 5th switching tube S5The other end and the 6th switching tube S6One end, the 3rd diode D3The other end be connected, the 6th switch
Pipe S6The other end be connected with the N-terminal of dc bus, the 4th electric capacity C4The other end and the 4th inductance L4One end, the 7th switch
Pipe S7One end be connected, the 7th switching tube S7The other end and the 8th switching tube S8One end, the 4th diode D4Other end phase
Even, the 8th switching tube S8The other end be connected with the N-terminal of dc bus, the 4th inductance L4The other end and the 8th electric capacity C8One
The B of end, threephase load or three phase network is connected to point B；
The P ends of dc bus pass through the 5th inductance L5With the 5th electric capacity C5One end, the 9th switching tube S9One end be connected,
5th electric capacity C5The other end and the 6th electric capacity C6One end, the 5th diode D5One end, the 6th diode D6One end phase
Even, the 9th switching tube S9The other end and the tenth switching tube S10One end, the 5th diode D5The other end be connected, the tenth switch
Pipe S10The other end be connected with the N-terminal of dc bus, the 6th electric capacity C6The other end and the 6th inductance L6One end, the 11st open
Close pipe S11One end be connected, the 11st switching tube S11The other end and twelvemo close pipe S12One end, the 6th diode D6's
The other end is connected, and twelvemo closes pipe S12The other end be connected with the N-terminal of dc bus, the 6th inductance L6The other end and the 9th
Electric capacity C9The C of one end, threephase load or three phase network be connected to point C；
7th electric capacity C7The other end, the 8th electric capacity C8The other end and the 9th electric capacity C9The other end be connected to point M, three
Phase load or three phase network are connected to point O.
2) and 3) in the same manner, it is respectively with substituting technical scheme after the improvement of B phases and C phases：
2) a kind of three-phase Cuk buck-boost type three-level inverters, it includes dc bus, eight switching tubes, four two poles
Pipe, four inductance and nine electric capacity；
The P ends of dc bus pass through the first inductance L1With the first electric capacity C1One end, first switch pipe S1One end be connected,
First electric capacity C1The other end and the second electric capacity C2One end, the first diode D1One end, the second diode D2One end phase
Even, first switch pipe S1The other end and second switch pipe S2One end, the first diode D1The other end be connected, second switch
Pipe S2The other end be connected with the N-terminal of dc bus, the second electric capacity C2The other end and the second inductance L2One end, the 3rd switch
Pipe S3One end be connected, the 3rd switching tube S3The other end and the 4th switching tube S4One end, the second diode D2Other end phase
Even, the 4th switching tube S4The other end be connected with the N-terminal of dc bus, the second inductance L2The other end and the 7th electric capacity C7One
The A of end, threephase load or three phase network is connected to point A；
First derided capacitors C of the P ends of dc bus by series connectionn1With the second derided capacitors Cn2The N of connection dc bus
End, the first derided capacitors Cn1With the second derided capacitors Cn2Junction point J and the 8th electric capacity C8One end, threephase load or three-phase electricity
The B of net is connected to point B；
The P ends of dc bus pass through the 5th inductance L5With the 5th electric capacity C5One end, the 9th switching tube S9One end be connected,
5th electric capacity C5The other end and the 6th electric capacity C6One end, the 5th diode D5One end, the 6th diode D6One end phase
Even, the 9th switching tube S9The other end and the tenth switching tube S10One end, the 5th diode D5The other end be connected, the tenth switch
Pipe S10The other end be connected with the N-terminal of dc bus, the 6th electric capacity C6The other end and the 6th inductance L6One end, the 11st open
Close pipe S11One end be connected, the 11st switching tube S11The other end and twelvemo close pipe S12One end, the 6th diode D6's
The other end is connected, and twelvemo closes pipe S12The other end be connected with the N-terminal of dc bus, the 6th inductance L6The other end and the 9th
Electric capacity C9The C of one end, threephase load or three phase network be connected to point C；
7th electric capacity C7The other end, the 8th electric capacity C8The other end and the 9th electric capacity C9The other end be connected to point M, three
Phase load or three phase network are connected to point O.
3) a kind of three-phase Cuk buck-boost type three-level inverters, it includes dc bus, eight switching tubes, four two poles
Pipe, four inductance and nine electric capacity；
The P ends of dc bus pass through the first inductance L1With the first electric capacity C1One end, first switch pipe S1One end be connected,
First electric capacity C1The other end and the second electric capacity C2One end, the first diode D1One end, the second diode D2One end phase
Even, first switch pipe S1The other end and second switch pipe S2One end, the first diode D1The other end be connected, second switch
Pipe S2The other end be connected with the N-terminal of dc bus, the second electric capacity C2The other end and the second inductance L2One end, the 3rd switch
Pipe S3One end be connected, the 3rd switching tube S3The other end and the 4th switching tube S4One end, the second diode D2Other end phase
Even, the 4th switching tube S4The other end be connected with the N-terminal of dc bus, the second inductance L2The other end and the 7th electric capacity C7One
The A of end, threephase load or three phase network is connected to point A；
The P ends of dc bus pass through the 3rd inductance L3With the 3rd electric capacity C3One end, the 5th switching tube S5One end be connected,
3rd electric capacity C3The other end and the 4th electric capacity C4One end, the 3rd diode D3One end, the 4th diode D4One end phase
Even, the 5th switching tube S5The other end and the 6th switching tube S6One end, the 3rd diode D3The other end be connected, the 6th switch
Pipe S6The other end be connected with the N-terminal of dc bus, the 4th electric capacity C4The other end and the 4th inductance L4One end, the 7th switch
Pipe S7One end be connected, the 7th switching tube S7The other end and the 8th switching tube S8One end, the 4th diode D4Other end phase
Even, the 8th switching tube S8The other end be connected with the N-terminal of dc bus, the 4th inductance L4The other end and the 8th electric capacity C8One
The B of end, threephase load or three phase network is connected to point B；
First derided capacitors C of the P ends of dc bus by series connectionn1With the second derided capacitors Cn2The N of connection dc bus
End, the first derided capacitors Cn1With the second derided capacitors Cn2Junction point J and the 9th electric capacity C9One end, threephase load or three-phase electricity
The C of net is connected to point C；
7th electric capacity C7The other end, the 8th electric capacity C8The other end and the 9th electric capacity C9The other end be connected to point M, three
Phase load or three phase network are connected to point O.
In the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention and take increasing
On the basis of strong common mode inhibition capacity measure (1), as needed, following measures are taken to reduce contactor pipe quantity：In direct current
The the first derided capacitors C for connecting is accessed between bus P ends and N-terminaln1With the second derided capacitors Cn2, the first derided capacitors Cn1With
Two derided capacitors Cn2It is connected to J points, substitutes wherein any one corresponding inductance, electric capacity, diode and switching tube, and by the phase
Corresponding load or electrical network are connected to the first derided capacitors Cn1With the second derided capacitors Cn2Junction point J；A phases include：First inductance
L1With the second inductance L2, the first electric capacity C1With the second electric capacity C2, the first diode D1With the second diode D2, first switch pipe S1、
Second switch pipe S2, the 3rd switching tube S3With the 4th switching tube S4；B phases include：3rd inductance L3With the 4th inductance L4, the 3rd electric capacity
C3With the 4th electric capacity C4, the 3rd diode D3With the 4th diode D4, the 5th switching tube S5, the 6th switching tube S6, the 7th switching tube
S7With the 8th switching tube S8；C phases include：5th inductance L5With the 6th inductance L6, the 5th electric capacity C5With the 6th electric capacity C6, the five or two pole
Pipe D5With the 6th diode D6, the 9th switching tube S9, the tenth switching tube S10, the 11st switching tube S11Pipe S is closed with twelvemo12。
Fig. 5 is the first circuit form of a kind of three-phase Cuk buck-boost types three-level inverter proposed by the present invention at the P ends of dc bus
The the first derided capacitors C for connecting is accessed between N-terminaln1With the second derided capacitors Cn2, the first derided capacitors Cn1With the second partial pressure electricity
Hold Cn2Point J is connected to, wherein A corresponding inductance, electric capacity and diode, switching tube are removed, and by the corresponding load
Or electrical network is connected to the first derided capacitors Cn1With the second derided capacitors Cn2Junction point J, and the N-terminal of electric capacity midpoint M and dc bus
Circuit theory diagrams under connection.
Present invention also offers a kind of second circuit form of three-phase Cuk buck-boost type three-level inverters.Shown in Fig. 6
In a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter of the present invention, it can be seen that the circuit form bag
Include dc bus, 12 switching tubes, six inductance and nine electric capacity；
P ' the ends of dc bus are by the first inductance L1' and the first electric capacity C1' one end, first switch pipe S1' one end phase
Even, the first electric capacity C1' the other end and the second inductance L2' one end, the 3rd switching tube S3' one end be connected, first switch pipe
S1' the other end and second switch pipe S2' one end, the second electric capacity C2' one end be connected, second switch pipe S2' the other end
It is connected with the N ' ends of dc bus, the second electric capacity C2' the other end and the 3rd switching tube S3' the other end, the 4th switching tube S4′
One end be connected, the 4th switching tube S4' the N ' ends of the other end and dc bus be connected, the second inductance L2' the other end and the 7th
Electric capacity C7' the A of one end, threephase load or three phase network be connected to point A '；
P ' the ends of dc bus are by the 3rd inductance L3' and the 3rd electric capacity C3' one end, the 5th switching tube S5' one end phase
Even, the 3rd electric capacity C3' the other end and the 4th inductance L4' one end, the 7th switching tube S7' one end be connected, the 5th switching tube
S5' the other end and the 6th switching tube S6' one end, the 4th electric capacity C4' one end be connected, the 6th switching tube S6' the other end with
N ' the ends of dc bus are connected, the 4th electric capacity C4' the other end and the 7th switching tube S7' the other end, the 8th switching tube S8'
One end is connected, the 8th switching tube S8' the N ' ends of the other end and dc bus be connected, the 4th inductance L4' the other end it is electric with the 8th
Hold C8' the B of one end, threephase load or three phase network be connected to point B '；
P ' the ends of dc bus are by the 5th inductance L5' and the 5th electric capacity C5' one end, the 9th switching tube S9' one end phase
Even, the 5th electric capacity C5' the other end and the 6th inductance L6' one end, the 11st switching tube S11' one end be connected, the 9th switch
Pipe S9' the other end and the tenth switching tube S10' one end, the 6th electric capacity C6' one end be connected, the tenth switching tube S10' it is another
Hold and be connected with the N ' ends of dc bus, the 6th electric capacity C6' the other end and the 11st switching tube S11' the other end, twelvemo
Close pipe S12' one end be connected, twelvemo close pipe S12' the N ' ends of the other end and dc bus be connected, the 6th inductance L6' it is another
One end and the 9th electric capacity C9' the C of one end, threephase load or three phase network be connected to point C '；
7th electric capacity C7' the other end, the 8th electric capacity C8' the other end and the 9th electric capacity C9' the other end be connected to a little
M ', threephase load or three phase network are connected to point O '.
Substantially, a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention be
On the basis of conventional three-phase Cuk type two-level inverters, the tri-level circuit form constructed using striding capacitance.The present invention is carried
Second form for going out inverter is keeping conventional three-phase Cuk type two-level inverters output AC voltage more than direct current input electricity
While pressure feature, the voltage stress that its switching tube bears is only the half of conventional three-phase Cuk type two-level inverters, more applicable
In high voltage appearance applications.
On the basis of a kind of second circuit form of three-phase buck-boost type three-level inverter proposed by the present invention, according to
Need, may also take on the improvement of one of following two measures, to strengthen common mode inhibition capacity：
(3) by the 7th electric capacity C7', the 8th electric capacity C8' and the 9th electric capacity C9' the N ' ends of junction point M ' and dc bus connect
Connect, as shown in Figure 7；
(4) dc bus P ' end with access between N ' ends connect first suppression electric capacity Ct1' and the second suppression electric capacity
Ct2', first suppresses electric capacity Ct1' suppress electric capacity C with secondt2' point H ' is connected to, suppress electric capacity C by firstt1', second suppress electricity
Hold Ct2' junction point H ' and the 7th electric capacity C7', the 8th electric capacity C8', the 9th electric capacity C9' junction point M ' be connected, as shown in Figure 8.
On the basis of a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention,
As needed, contactor quantity can also be reduced using following measures：String is accessed between the P ' ends and N ' ends of dc bus
First derided capacitors C of connectionn1' and the second derided capacitors Cn2', the first derided capacitors Cn1' and the second derided capacitors Cn2' be connected to
Point J ', substitutes wherein any one corresponding inductance, electric capacity and switching tube, and the corresponding load or electrical network is connected to first
Derided capacitors Cn1' and the second derided capacitors Cn2' junction point J '；A phases include：First inductance L1' and the second inductance L2', first
Electric capacity C1' and the second electric capacity C2', first switch pipe S1', second switch pipe S2', the 3rd switching tube S3' and the 4th switching tube S4′；B
Mutually include：3rd inductance L3' and the 4th inductance L4', the 3rd electric capacity C3' and the 4th electric capacity C4', the 5th switching tube S5', the 6th switch
Pipe S6', the 7th switching tube S7' and the 8th switching tube S8′；C phases include：5th inductance L5' and the 6th inductance L6', the 5th electric capacity C5′
With the 6th electric capacity C6', the 9th switching tube S9', the tenth switching tube S10', the 11st switching tube S11' and twelvemo pass pipe S12′。
Technical scheme its improvement after is illustrated to substitute A phases with reference to Fig. 9：
4) a kind of three-phase Cuk buck-boost type three-level inverters, as shown in figure 9, it includes dc bus, eight switches
Pipe, four inductance and nine electric capacity；
First derided capacitors C of the P ' ends of dc bus by series connectionn1' and the second derided capacitors Cn2' connection dc bus
N ' ends, the first derided capacitors Cn1' and the second derided capacitors Cn2' junction point J ' and the 7th electric capacity C7' one end, threephase load
Or the A of three phase network is connected to point A '；
P ' the ends of dc bus are by the 3rd inductance L3' and the 3rd electric capacity C3' one end, the 5th switching tube S5' one end phase
Even, the 3rd electric capacity C3' the other end and the 4th inductance L4' one end, the 7th switching tube S7' one end be connected, the 5th switching tube
S5' the other end and the 6th switching tube S6' one end, the 4th electric capacity C4' one end be connected, the 6th switching tube S6' the other end with
N ' the ends of dc bus are connected, the 4th electric capacity C4' the other end and the 7th switching tube S7' the other end, the 8th switching tube S8'
One end is connected, the 8th switching tube S8' the N ' ends of the other end and dc bus be connected, the 4th inductance L4' the other end it is electric with the 8th
Hold C8' the B of one end, threephase load or three phase network be connected to point B '；
P ' the ends of dc bus are by the 5th inductance L5' and the 5th electric capacity C5' one end, the 9th switching tube S9' one end phase
Even, the 5th electric capacity C5' the other end and the 6th inductance L6' one end, the 11st switching tube S11' one end be connected, the 9th switch
Pipe S9' the other end and the tenth switching tube S10' one end, the 6th electric capacity C6' one end be connected, the tenth switching tube S10' it is another
Hold and be connected with the N ' ends of dc bus, the 6th electric capacity C6' the other end and the 11st switching tube S11' the other end, twelvemo
Close pipe S12' one end be connected, twelvemo close pipe S12' the N ' ends of the other end and dc bus be connected, the 6th inductance L6' it is another
One end and the 9th electric capacity C9' the C of one end, threephase load or three phase network be connected to point C '；
7th electric capacity C7' the other end, the 8th electric capacity C8' the other end, the 9th electric capacity C9' the other end be connected to point M ',
Threephase load or three phase network are connected to point O '.
5) and 6) in the same manner, after substituting the improvement of B phases and C phases, technical scheme is respectively：
5) a kind of three-phase Cuk buck-boost type three-level inverters, it includes dc bus, eight switching tubes, four inductance
With nine electric capacity；
P ' the ends of dc bus are by the first inductance L1' and the first electric capacity C1' one end, first switch pipe S1' one end phase
Even, the first electric capacity C1' the other end and the second inductance L2' one end, the 3rd switching tube S3' one end be connected, first switch pipe
S1' the other end and second switch pipe S2' one end, the second electric capacity C2' one end be connected, second switch pipe S2' the other end with
N ' the ends of dc bus are connected, the second electric capacity C2' the other end and the 3rd switching tube S3' the other end, the 4th switching tube S4'
One end is connected, the 4th switching tube S4' the N ' ends of the other end and dc bus be connected, the second inductance L2' the other end it is electric with the 7th
Hold C7' the A of one end, threephase load or three phase network be connected to point A '；
First derided capacitors C of the P ' ends of dc bus by series connectionn1' and the second derided capacitors Cn2' connection dc bus
N ' ends, the first derided capacitors Cn1' and the second derided capacitors Cn2' junction point J ' and the 8th electric capacity C8' one end, threephase load
Or the B of three phase network is connected to point B '；
P ' the ends of dc bus are by the 5th inductance L5' and the 5th electric capacity C5' one end, the 9th switching tube S9' one end phase
Even, the 5th electric capacity C5' the other end and the 6th inductance L6' one end, the 11st switching tube S11' one end be connected, the 9th switch
Pipe S9' the other end and the tenth switching tube S10' one end, the 6th electric capacity C6' one end be connected, the tenth switching tube S10' it is another
Hold and be connected with the N ' ends of dc bus, the 6th electric capacity C6' the other end and the 11st switching tube S11' the other end, twelvemo
Close pipe S12' one end be connected, twelvemo close pipe S12' the N ' ends of the other end and dc bus be connected, the 6th inductance L6' it is another
One end and the 9th electric capacity C9' the C of one end, threephase load or three phase network be connected to point C '；
7th electric capacity C7' the other end, the 8th electric capacity C8' the other end, the 9th electric capacity C9' the other end be connected to point M ',
Threephase load or three phase network are connected to point O '.
6) a kind of three-phase Cuk buck-boost type three-level inverters, it includes dc bus, eight switching tubes, four inductance
With nine electric capacity；
P ' the ends of dc bus are by the first inductance L1' and the first electric capacity C1' one end, first switch pipe S1' one end phase
Even, the first electric capacity C1' the other end and the second inductance L2' one end, the 3rd switching tube S3' one end be connected, first switch pipe
S1' the other end and second switch pipe S2' one end, the second electric capacity C2' one end be connected, second switch pipe S2' the other end with
N ' the ends of dc bus are connected, the second electric capacity C2' the other end and the 3rd switching tube S3' the other end, the 4th switching tube S4'
One end is connected, the 4th switching tube S4' the N ' ends of the other end and dc bus be connected, the second inductance L2' the other end it is electric with the 7th
Hold C7' the A of one end, threephase load or three phase network be connected to point A '；
P ' the ends of dc bus are by the 3rd inductance L3' and the 3rd electric capacity C3' one end, the 5th switching tube S5' one end phase
Even, the 3rd electric capacity C3' the other end and the 4th inductance L4' one end, the 7th switching tube S7' one end be connected, the 5th switching tube
S5' the other end and the 6th switching tube S6' one end, the 4th electric capacity C4' one end be connected, the 6th switching tube S6' the other end with
N ' the ends of dc bus are connected, the 4th electric capacity C4' the other end and the 7th switching tube S7' the other end, the 8th switching tube S8'
One end is connected, the 8th switching tube S8' the N ' ends of the other end and dc bus be connected, the 4th inductance L4' the other end it is electric with the 8th
Hold C8' the B of one end, threephase load or three phase network be connected to point B '；
First derided capacitors C of the P ' ends of dc bus by series connectionn1' and the second derided capacitors Cn2' connection dc bus
N ' ends, the first derided capacitors Cn1' and the second derided capacitors Cn2' junction point H ' and the 9th electric capacity C9' one end, threephase load
Or the C of three phase network is connected to point C '；
7th electric capacity C7' the other end, the 8th electric capacity C8' the other end, the 9th electric capacity C9' the other end be connected to point M ',
Threephase load or three phase network are connected to point O '.
In a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention and take increasing
On the basis of strong common mode inhibition capacity measure 1, as needed, contactor quantity can also be reduced using following measures：Straight
P ' the ends of stream bus with the first derided capacitors C for connecting is accessed between N ' endsn1' and the second derided capacitors Cn2', the first partial pressure electricity
Hold Cn1' and the second derided capacitors Cn2' J ' points are connected to, wherein any one corresponding inductance, electric capacity and switching tube are substituted, and
The corresponding load or electrical network are connected to into the first derided capacitors Cn1' and the second derided capacitors Cn2' junction point J '；A phases are wrapped
Include：First inductance L1' and the second inductance L2', the first electric capacity C1' and the second electric capacity C2', first switch pipe S1', second switch pipe
S2', the 3rd switching tube S3' and the 4th switching tube S4′；B phases include：3rd inductance L3' and the 4th inductance L4', the 3rd electric capacity C3' and
4th electric capacity C4', the 5th switching tube S5', the 6th switching tube S6', the 7th switching tube S7' and the 8th switching tube S8′；C phases include：The
Five inductance L5' and the 6th inductance L6', the 5th electric capacity C5' and the 6th electric capacity C6', the 9th switching tube S9', the tenth switching tube S10',
11 switching tube S11' and twelvemo pass pipe S12′。
Figure 10 is a kind of second circuit form of three-phase Cuk buck-boost types three-level inverter proposed by the present invention in direct current
The the first derided capacitors C for connecting is accessed between the P ends of bus and N-terminaln1' and the second derided capacitors Cn2', the first derided capacitors Cn1′
With the second derided capacitors Cn2' point J ' is connected to, A phase inductances, electric capacity, switching tube are removed, and by the corresponding load or electricity
Net is connected to the first derided capacitors Cn1' and the second derided capacitors Cn2' junction point J ', and the N ' of electric capacity midpoint M ' and dc bus
Hold the circuit theory diagrams under connection.
Claims (8)
1. a kind of three-phase Cuk buck-boost type three-level inverters, it include dc bus, 12 switching tubes, six diodes,
Six inductance and nine electric capacity；It is characterized in that：
The P ends of dc bus pass through the first inductance L1With the first electric capacity C1One end, first switch pipe S1One end be connected；First
Electric capacity C1The other end and the second electric capacity C2One end, the first diode D1One end, the second diode D2One end be connected；The
One switching tube S1The other end and second switch pipe S2One end, the first diode D1The other end be connected；Second switch pipe S2's
The other end is connected with the N-terminal of dc bus；Second electric capacity C2The other end and the second inductance L2One end, the 3rd switching tube S3's
One end is connected；3rd switching tube S3The other end and the 4th switching tube S4One end, the second diode D2The other end be connected；The
Four switching tube S4The other end be connected with the N-terminal of dc bus；Second inductance L2The other end and the 7th electric capacity C7One end, three
The A of phase load or three phase network is connected to point A；
The P ends of dc bus pass through the 3rd inductance L3With the 3rd electric capacity C3One end, the 5th switching tube S5One end be connected；3rd
Electric capacity C3The other end and the 4th electric capacity C4One end, the 3rd diode D3One end, the 4th diode D4One end be connected；The
Five switching tube S5The other end and the 6th switching tube S6One end, the 3rd diode D3The other end be connected；6th switching tube S6's
The other end is connected with the N-terminal of dc bus；4th electric capacity C4The other end and the 4th inductance L4One end, the 7th switching tube S7's
One end is connected；7th switching tube S7The other end and the 8th switching tube S8One end, the 4th diode D4The other end be connected；The
Eight switching tube S8The other end be connected with the N-terminal of dc bus；4th inductance L4The other end and the 8th electric capacity C8One end, three
The B of phase load or three phase network is connected to point B；
The P ends of dc bus pass through the 5th inductance L5With the 5th electric capacity C5One end, the 9th switching tube S9One end be connected；5th
Electric capacity C5The other end and the 6th electric capacity C6One end, the 5th diode D5One end, the 6th diode D6One end be connected；The
Nine switching tube S9The other end and the tenth switching tube S10One end, the 5th diode D5The other end be connected；Tenth switching tube S10
The other end be connected with the N-terminal of dc bus；6th electric capacity C6The other end and the 6th inductance L6One end, the 11st switching tube
S11One end be connected；11st switching tube S11The other end and twelvemo close pipe S12One end, the 6th diode D6It is another
End is connected；Twelvemo closes pipe S12The other end be connected with the N-terminal of dc bus；6th inductance L6The other end and the 9th electric capacity
C9The C of one end, threephase load or three phase network be connected to point C；
7th electric capacity C7The other end, the 8th electric capacity C8The other end and the 9th electric capacity C9The other end be connected to point M, three-phase is born
Carry or three phase network is connected to point O.
2. a kind of three-phase Cuk buck-boost type three-level inverters according to claim 1, it is characterised in that：7th electric capacity
C7, the 8th electric capacity C8With the 9th electric capacity C9Junction point M be connected with the N-terminal of dc bus.
3. a kind of three-phase Cuk buck-boost type three-level inverters according to claim 1, it is characterised in that：It is female in direct current
The the first suppression electric capacity C for connecting is accessed between the P ends of line and N-terminalt1Suppress electric capacity C with secondt2, first suppresses electric capacity Ct1With
Two suppress electric capacity Ct2It is connected to point H；First suppresses electric capacity Ct1, second suppress electric capacity Ct2Junction point H and the 7th electric capacity C7,
Eight electric capacity C8With the 9th electric capacity C9Junction point M be connected.
4. a kind of three-phase Cuk buck-boost type three-level inverters according to claim 1 and 2, it is characterised in that：In direct current
The the first derided capacitors C for connecting is accessed between the P ends of bus and N-terminaln1With the second derided capacitors Cn2, the first derided capacitors Cn1With
Second derided capacitors Cn2Point J is connected to, wherein any one corresponding inductance, electric capacity, diode and switching tube is substituted, and should
Corresponding load or electrical network are connected to the first derided capacitors Cn1With the second derided capacitors Cn2Junction point J；A phases include：First is electric
Sense L1With the second inductance L2, the first electric capacity C1With the second electric capacity C2, the first diode D1With the second diode D2, first switch pipe
S1, second switch pipe S2, the 3rd switching tube S3With the 4th switching tube S4；B phases include：3rd inductance L3With the 4th inductance L4, the 3rd
Electric capacity C3With the 4th electric capacity C4, the 3rd diode D3With the 4th diode D4, the 5th switching tube S5, the 6th switching tube S6, the 7th open
Close pipe S7With the 8th switching tube S8；C phases include：5th inductance L5With the 6th inductance L6, the 5th electric capacity C5With the 6th electric capacity C6, the 5th
Diode D5With the 6th diode D6, the 9th switching tube S9, the tenth switching tube S10, the 11st switching tube S11Close with twelvemo and manage
S12。
5. a kind of three-phase Cuk buck-boost type three-level inverters, it include dc bus, 12 switching tubes, six inductance and
Nine electric capacity；It is characterized in that：
P ' the ends of dc bus are by the first inductance L1' and the first electric capacity C1' one end, first switch pipe S1' one end be connected；
First electric capacity C1' the other end and the second inductance L2' one end, the 3rd switching tube S3' one end be connected；First switch pipe S1'
The other end and second switch pipe S2' one end, the second electric capacity C2' one end be connected；Second switch pipe S2' the other end and direct current
N ' the ends of bus are connected；Second electric capacity C2' the other end and the 3rd switching tube S3' the other end, the 4th switching tube S4' one end
It is connected；4th switching tube S4' the N ' ends of the other end and dc bus be connected；Second inductance L2' the other end and the 7th electric capacity
C7' the A of one end, threephase load or three phase network be connected to point A '；
P ' the ends of dc bus are by the 3rd inductance L3' and the 3rd electric capacity C3' one end, the 5th switching tube S5' one end be connected；
3rd electric capacity C3' the other end and the 4th inductance L4' one end, the 7th switching tube S7' one end be connected；5th switching tube S5'
The other end and the 6th switching tube S6' one end, the 4th electric capacity C4' one end be connected；6th switching tube S6' the other end and direct current
N ' the ends of bus are connected；4th electric capacity C4' the other end and the 7th switching tube S7' the other end, the 8th switching tube S8' one end
It is connected；8th switching tube S8' the N ' ends of the other end and dc bus be connected；4th inductance L4' the other end and the 8th electric capacity
C8' the B of one end, threephase load or three phase network be connected to point B '；
P ' the ends of dc bus are by the 5th inductance L5' and the 5th electric capacity C5' one end, the 9th switching tube S9' one end be connected；
5th electric capacity C5' the other end and the 6th inductance L6' one end, the 11st switching tube S11' one end be connected；9th switching tube S9′
The other end and the tenth switching tube S10' one end, the 6th electric capacity C6' one end be connected；Tenth switching tube S10' the other end with it is straight
N ' the ends of stream bus are connected；6th electric capacity C6' the other end and the 11st switching tube S11' the other end, twelvemo close pipe S12′
One end be connected；Twelvemo closes pipe S12' the N ' ends of the other end and dc bus be connected；6th inductance L6' the other end with
9th electric capacity C9' the C of one end, threephase load or three phase network be connected to point C '；
7th electric capacity C7' the other end, the 8th electric capacity C8' the other end and the 9th electric capacity C9' the other end be connected to point M ', three
Phase load or three phase network are connected to point O '.
6. a kind of three-phase Cuk buck-boost type three-level inverters according to claim 5, it is characterised in that：7th electric capacity
C7', the 8th electric capacity C8' and the 9th electric capacity C9' the N ' ends of junction point M ' and dc bus be connected.
7. a kind of three-phase Cuk buck-boost type three-level inverters according to claim 5, it is characterised in that：It is female in direct current
Line P ' end with access between N ' ends connect first suppression electric capacity Ct1' and the second suppression electric capacity Ct2', first suppresses electric capacity Ct1′
Suppress electric capacity C with secondt2' point H ' is connected to, first suppresses electric capacity Ct1', second suppress electric capacity Ct2' junction point H ' and the 7th
Electric capacity C7', the 8th electric capacity C8' and the 9th electric capacity C9' junction point M ' be connected.
8. a kind of three-phase Cuk buck-boost type three-level inverters according to claim 5 or 6, it is characterised in that：In direct current
P ' the ends of bus with the first derided capacitors C for connecting is accessed between N ' endsn1' and the second derided capacitors Cn2', the first derided capacitors
Cn1' and the second derided capacitors Cn2' point J ' is connected to, wherein any one corresponding inductance, electric capacity and switching tube are substituted, and will
The corresponding load or electrical network are connected to the first derided capacitors Cn1' and the second derided capacitors Cn2' junction point J '；A phases include：
First inductance L1' and the second inductance L2', the first electric capacity C1' and the second electric capacity C2', first switch pipe S1', second switch pipe S2′、
3rd switching tube S3' and the 4th switching tube S4′；B phases include：3rd inductance L3' and the 4th inductance L4', the 3rd electric capacity C3' and the 4th
Electric capacity C4', the 5th switching tube S5', the 6th switching tube S6', the 7th switching tube S7' and the 8th switching tube S8′；C phases include：5th is electric
Sense L5' and the 6th inductance L6', the 5th electric capacity C5' and the 6th electric capacity C6', the 9th switching tube S9', the tenth switching tube S10', the 11st
Switching tube S11' and twelvemo pass pipe S12′。
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| CN201510020561.2A CN104660078B (en) | 2015-01-15 | 2015-01-15 | Three-phase Cuk voltage rising and reducing three-electric level inverter |
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Denomination of invention: A three-phase Cuk voltage up and down three-level inverter Effective date of registration: 20230324 Granted publication date: 20170412 Pledgee: Agricultural Bank of China Limited Shijiazhuang Ziqiang Branch Pledgor: HEBEI SHENKE ELECTRIC POWER CO.,LTD.|HEBEI SHENKE ELECTRONICS Co.,Ltd.|Hebei Shenke magnetic materials Co.,Ltd.|Hebei Shenke Intelligent Manufacturing Co.,Ltd.|Hebei Shenke mould Co.,Ltd.|Shenke Technology Group Co.,Ltd. Registration number: Y2023980036116 |