CN108429474A - A kind of more levels full-bridge converters and more level isolation type bidirectional DC-DC converters - Google Patents
A kind of more levels full-bridge converters and more level isolation type bidirectional DC-DC converters Download PDFInfo
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- CN108429474A CN108429474A CN201810291803.5A CN201810291803A CN108429474A CN 108429474 A CN108429474 A CN 108429474A CN 201810291803 A CN201810291803 A CN 201810291803A CN 108429474 A CN108429474 A CN 108429474A
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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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
-
- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
- H02M7/2195—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration the switches being synchronously commutated at the same frequency of the AC input voltage
Abstract
The invention discloses a kind of more levels full-bridge converters and more level isolation type bidirectional DC DC converters.The clamped three level bridge arm of single-phase striding capacitance is used in more levels full-bridge converters provided by the invention, five level output voltage states can be generated between two ac terminals, compared with the full-bridge converter of traditional two level bridge arm of use, output voltage capability is doubled, improve the output voltage grade of isolation type bidirectional DC DC converters, the full-bridge converter solved in current DC DC converters can only export two level, keep the two-way DC DC converters of realization high-voltage large-capacity difficult, the technical issues of application range is restricted.
Description
Technical field
The present invention relates to electric and electronic power transformation field more particularly to a kind of more levels full-bridge converters and more level every
From formula bidirectional DC-DC converter.
Background technology
Many revolutionary changes have taken place in modern transmission and distribution network, and the demand to direct current transmission and distribution is increasing.It is negative
Lotus center is more and more the electric power for being fixed against long-distance sand transport, and direct current transportation mode is sent out in long distance power transmission or new energy
It is electrically accessed aspect to have a clear superiority, the distributed generation resource of more and more single flow, such as photovoltaic hair is also included in distribution side
Electricity, battery energy storage etc..More and more loads need to use direct current supply.Such as data center, LED, electric vehicle etc..And
A large amount of consumption figure electronics, such as personal computer, mobile phone and tablet computer etc..It, can in power distribution network by the way of direct current
To occupy less transmission of electricity corridor, and the features such as its quick controllability can be utilized, it is tired to solve power supply present in urban electricity supply
The problems such as difficult, of high cost and trend is difficult to control, maintains the safe and reliable economical operation of urban distribution network.
DC voltage is difficult to realize voltage transformation by magnetic-coupled mode as AC transformer, it is therefore necessary to be based on
Power electronic technique realizes the transmission of the transformation and power of DC voltage by DC-DC converter.For needing electrical isolation
DC converting occasion or both sides DC voltage level differ larger occasion, still need to use transformation in DC-DC converter
Device.But since Industrial Frequency Transformer is bulky, quality is heavy, loss is larger and noise is very big, it is difficult to realize power conversion
The high power density and high efficiency of system.Traditional Industrial Frequency Transformer is replaced to be generally considered down by using high frequency transformer
The inevitable development trend of generation power conversion.Using the advantage of high frequency transformer scheme be device it is small, light-weight, at
This is low, and can avoid traditional Industrial Frequency Transformer since iron core magnetic saturation causes the problem of voltage current waveform distorts in system, if
Switching frequency is increased to 20kHz or more, can more greatly reduce the running noises of device.Power becomes especially in intelligent grid
It changes under the more and more universal overall background of system, high-frequency isolation power conversion technology has a extensive future.
The bidirectional DC-DC converter of high-frequency isolation is mainly by two full-bridge converters and a high-frequency isolation transformer group
At.By the square-wave voltage for controlling full-bridge converter high-frequency ac outlet side, so that it may be added in auxiliary induction both end voltage with control
Size and phase, and then control power size and flow direction.Current full-bridge converter mostly uses greatly two Level Full Bridge circuits,
Voltage class in switching device is limited, and the voltage that two Level Full Bridge circuits can export is also restrained, makes
Realize that the bidirectional DC-DC converter of high-voltage large-capacity is difficult, application field is also restrained.Therefore, current DC-DC is resulted in
Full-bridge converter in converter can only export two level, keep the bidirectional DC-DC converter of realization high-voltage large-capacity difficult, application
The technical issues of range is restricted.
Invention content
The present invention provides a kind of more levels full-bridge converters and more level isolation type bidirectional DC-DC converters, solve
Full-bridge converter in current DC-DC converter can only export two level, make the bidirectional DC-DC converter of realization high-voltage large-capacity
The technical issues of device is difficult, and application range is restricted.
The present invention provides a kind of more levels full-bridge converters, including：First switch pipe, second switch pipe, third switch
Pipe, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the first diode, the two or two pole
Pipe, third diode, the 4th diode, the 5th diode, the 6th diode, the 7th diode, the 8th diode, the first electricity
Appearance, the second capacitance and third capacitance；
The moon of the first end of first switch pipe, the cathode of the first diode, the first end of the 5th switching tube, the 5th diode
The first end of pole and third capacitance is electrically connected to each other the first DC terminal of composition；
The second end of 4th switching tube, the sun of the anode of the 4th diode, the second end of the 8th switching tube, the 8th diode
The second end of pole and third capacitance is electrically connected to each other the second DC terminal of composition；
The second end of second switch pipe, the anode of the second diode, the first end of third switching tube and third diode
Cathode is electrically connected to each other the first ac terminal of composition；
The second end of 6th switching tube, the anode of the 6th diode, the first end of the 7th switching tube and the 7th diode
Cathode is electrically connected to each other the second ac terminal of composition；
The first end of first capacitance respectively with the second end of first switch pipe, the anode of the first diode, second switch pipe
First end and the first diode cathode electrical connection；
The second end of first capacitance respectively with the second end of third switching tube, the anode of third diode, the 4th switching tube
First end and the 4th diode cathode electrical connection；
The first end of second capacitance respectively with the second end of the 5th switching tube, anode, the 6th switching tube of the 5th diode
First end and the 6th diode cathode electrical connection；
The second end of second capacitance respectively with the second end of the 7th switching tube, anode, the 8th switching tube of the 7th diode
First end and the 8th diode cathode electrical connection.
Preferably, first switch pipe, second switch pipe, third switching tube, the 4th switching tube, the 5th switching tube, the 6th open
Guan Guan, the 7th switching tube and the 8th switching tube are IGBT, wherein and the first end of each switching tube is the collector of IGBT,
The second end of each switching tube is the emitter of the drain electrode of NMOS.
Preferably, first switch pipe, second switch pipe, third switching tube, the 4th switching tube, the 5th switching tube, the 6th open
Guan Guan, the 7th switching tube and the 8th switching tube are NMOS, wherein the first end of each switching tube is the drain electrode of NMOS, respectively
The second end of a switching tube is the source electrode of the drain electrode of NMOS.
Preferably, the first capacitance, the second capacitance and third capacitance are polarized capacitance, wherein the first capacitance, the second electricity
Hold and third capacitance first end be polarized capacitance anode, the first capacitance, the second capacitance and third capacitance second end
It is the negative terminal of polarized capacitance.
The present invention provides a kind of more level isolation type bidirectional DC-DC converters, including：Transformer and two it is above-mentioned arbitrary
A kind of more levels full-bridge converters；
Two line ends of the first side winding of transformer and the first ac terminal of levels full-bridge converter more than first and
Second ac terminal corresponds electrical connection；
Two line ends of the second side winding of transformer and the first ac terminal of levels full-bridge converter more than second and
Second ac terminal corresponds electrical connection.
Preferably, transformer is medium-frequency isolation transformer or high-frequency isolation transformer.
As can be seen from the above technical solutions, the present invention has the following advantages：
The present invention provides a kind of more levels full-bridge converters, including：First switch pipe, second switch pipe, third switch
Pipe, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the first diode, the two or two pole
Pipe, third diode, the 4th diode, the 5th diode, the 6th diode, the 7th diode, the 8th diode, the first electricity
Appearance, the second capacitance and third capacitance；The first end of first switch pipe, the cathode of the first diode, the 5th switching tube first end,
The cathode of 5th diode and the first end of third capacitance are electrically connected to each other the first DC terminal of composition；The second of 4th switching tube
The second end at end, the anode of the 4th diode, the second end of the 8th switching tube, the anode of the 8th diode and third capacitance is mutual
Electrical connection the second DC terminal of composition；The first end of the second end of second switch pipe, the anode of the second diode, third switching tube
It is electrically connected to each other the first ac terminal of composition with the cathode of third diode；The second end of 6th switching tube, the 6th diode
The cathode of anode, the first end of the 7th switching tube and the 7th diode is electrically connected to each other the second ac terminal of composition；First capacitance
First end respectively with the second end of first switch pipe, the anode of the first diode, the first end of second switch pipe and the one or two
The cathode of pole pipe is electrically connected；The second end of first capacitance respectively with the second end of third switching tube, the anode of third diode,
The cathode of the first end of four switching tubes and the 4th diode is electrically connected；The first end of second capacitance respectively with the 5th switching tube
The cathode electrical connection at two ends, the anode of the 5th diode, the first end of the 6th switching tube and the 6th diode；The of second capacitance
Two ends respectively with the second end of the 7th switching tube, the first end and the 8th diode of the anode of the 7th diode, the 8th switching tube
Cathode electrical connection.
The clamped three level bridge arm of single-phase striding capacitance, two friendships are used in more levels full-bridge converters provided by the invention
Five level output voltage states can be generated between stream terminal, compared with the full-bridge converter of traditional two level bridge arm of use,
Output voltage capability is doubled, and improves the output voltage grade of isolation type bidirectional DC-DC converters, solves current
Full-bridge converter in DC-DC converter can only export two level, keep the bidirectional DC-DC converter of realization high-voltage large-capacity tired
The technical issues of difficulty, application range is restricted.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of circuit diagram of more levels full-bridge converters provided in an embodiment of the present invention；
Fig. 2 is that an a kind of bridge arm of more levels full-bridge converters provided in an embodiment of the present invention is in the first operation mode
When circuit diagram；
Fig. 3 is that an a kind of bridge arm of more levels full-bridge converters provided in an embodiment of the present invention is in the second operation mode
When circuit diagram；
Fig. 4 is that an a kind of bridge arm of more levels full-bridge converters provided in an embodiment of the present invention is in third operation mode
When circuit diagram；
Fig. 5 is a kind of circuit diagram of more level isolation type bidirectional DC-DC converters provided in an embodiment of the present invention；
Wherein, reference numeral is as follows：
S1, first switch pipe；S2, second switch pipe；S3, third switching tube；S4, the 4th switching tube；S5, the 5th switch
Pipe；S6, the 6th switching tube；S7, the 7th switching tube；S8, the 8th switching tube；D1, the first diode；D2, the second diode；D3、
Third diode；D4, the 4th diode；D5, the 5th diode；D6, the 6th diode；D7, the 7th diode；D8, the eight or two
Pole pipe；C1, the first capacitance；C2, the second capacitance；C3, third capacitance；DC1, the first DC terminal；DC2, the second DC terminal；
AC1, the first ac terminal；AC2, the second ac terminal；1, levels full-bridge converter more than first；2, transformer；3, second
More levels full-bridge converters.
Specific implementation mode
An embodiment of the present invention provides a kind of more levels full-bridge converters and more level isolation type bidirectional DC-DC converters,
Two level can only be exported by solving the full-bridge converter in current DC-DC converter, make the two-way DC- of realization high-voltage large-capacity
The technical issues of DC converters are difficult, and application range is restricted.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
All other embodiment that those of ordinary skill is obtained without making creative work, belongs to protection of the present invention
Range.
Referring to Fig. 1, an embodiment of the present invention provides a kind of one embodiment of more levels full-bridge converters, including：The
One switching tube S1, second switch pipe S2, third switching tube S3, the 4th switching tube S4, the 5th switching tube S5, the 6th switching tube S6,
7th switching tube S7, the 8th switching tube S8, the first diode D1, the second diode D2, third diode D3, the 4th diode
D4, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the first capacitance C1, the second capacitance C2
With third capacitance C3；
The first end of first switch pipe S1, the cathode of the first diode D1, the first end of the 5th switching tube S5, the five or two pole
The cathode of pipe D5 and the first end of third capacitance C3 are electrically connected to each other the first DC terminal DC1 of composition；
The second end of 4th switching tube S4, the anode of the 4th diode D4, the second end of the 8th switching tube S8, the eight or two pole
The anode of pipe D8 and the second end of third capacitance C3 are electrically connected to each other the second DC terminal DC2 of composition；
The first end and the three or two of the second end of second switch pipe S2, the anode of the second diode D2, third switching tube S3
The cathode of pole pipe D3 is electrically connected to each other the first ac terminal AC1 of composition；
The first end and the seven or two of the second end of 6th switching tube S6, the anode of the 6th diode D6, the 7th switching tube S7
The cathode of pole pipe D7 is electrically connected to each other the second ac terminal AC2 of composition；
The first end of first capacitance C1 respectively with the second end of first switch pipe S1, the anode of the first diode D1, second
The cathode of the first end of switching tube S2 and the first diode D1 are electrically connected；
The second end of first capacitance C1 respectively with the second end of third switching tube S3, the anode of third diode D3, the 4th
The cathode of the first end of switching tube S4 and the 4th diode D4 are electrically connected；
The first end of second capacitance C2 respectively with the second end of the 5th switching tube S5, the anode of the 5th diode D5, the 6th
The cathode of the first end of switching tube S6 and the 6th diode D6 are electrically connected；
The second end of second capacitance C2 respectively with the second end of the 7th switching tube S7, the anode of the 7th diode D7, the 8th
The cathode of the first end of switching tube S8 and the 8th diode D8 are electrically connected.
It should be noted that using single-phase striding capacitance clamped three in more levels full-bridge converters provided in this embodiment
Level bridge arm can generate five level output voltage states between two ac terminals, with traditional two level bridge arm of use
Full-bridge converter is compared, and output voltage capability is doubled, and improves the output voltage etc. of isolation type bidirectional DC-DC converters
Grade, two level can only be exported by solving the full-bridge converter in current DC-DC converter, make the two-way of realization high-voltage large-capacity
The technical issues of DC-DC converter is difficult, and application range is restricted.
It is above a kind of one embodiment of more levels full-bridge converters provided in an embodiment of the present invention, is below the present invention
A kind of another embodiment for more levels full-bridge converters that embodiment provides.
It please refers to Fig.1, Fig. 2, Fig. 3 and Fig. 4, an embodiment of the present invention provides another of a kind of more levels full-bridge converters
Embodiment, including：First switch pipe S1, second switch pipe S2, third switching tube S3, the 4th switching tube S4, the 5th switching tube S5,
6th switching tube S6, the 7th switching tube S7, the 8th switching tube S8, the first diode D1, the second diode D2, third diode
D3, the 4th diode D4, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the first capacitance
C1, the second capacitance C2 and third capacitance C3；
The first end of first switch pipe S1, the cathode of the first diode D1, the first end of the 5th switching tube S5, the five or two pole
The cathode of pipe D5 and the first end of third capacitance C3 are electrically connected to each other the first DC terminal DC1 of composition；
The second end of 4th switching tube S4, the anode of the 4th diode D4, the second end of the 8th switching tube S8, the eight or two pole
The anode of pipe D8 and the second end of third capacitance C3 are electrically connected to each other the second DC terminal DC2 of composition；
The first end and the three or two of the second end of second switch pipe S2, the anode of the second diode D2, third switching tube S3
The cathode of pole pipe D3 is electrically connected to each other the first ac terminal AC1 of composition；
The first end and the seven or two of the second end of 6th switching tube S6, the anode of the 6th diode D6, the 7th switching tube S7
The cathode of pole pipe D7 is electrically connected to each other the second ac terminal AC2 of composition；
The first end of first capacitance C1 respectively with the second end of first switch pipe S1, the anode of the first diode D1, second
The cathode of the first end of switching tube S2 and the first diode D1 are electrically connected；
The second end of first capacitance C1 respectively with the second end of third switching tube S3, the anode of third diode D3, the 4th
The cathode of the first end of switching tube S4 and the 4th diode D4 are electrically connected；
The first end of second capacitance C2 respectively with the second end of the 5th switching tube S5, the anode of the 5th diode D5, the 6th
The cathode of the first end of switching tube S6 and the 6th diode D6 are electrically connected；
The second end of second capacitance C2 respectively with the second end of the 7th switching tube S7, the anode of the 7th diode D7, the 8th
The cathode of the first end of switching tube S8 and the 8th diode D8 are electrically connected.
It should be noted that set the DC voltage in more levels full-bridge converters on the first capacitance C1 and the second capacitance C2 as
DC voltage on E, third capacitance C3 is 2E, by taking the left bridge arm in more levels full-bridge converters as an example, more Level Full Bridge transformation
Device control mode and voltage output state are as follows, wherein the lines thickened portion in Fig. 2, Fig. 3 and Fig. 4 is that work is in circuit
Make the part of state, non-thickened portion is in off working state：
When first switch pipe S1 is open-minded, second switch pipe S2 conductings, third switching tube S3 is turned off, and the 4th switching tube S4 is closed
Break, as shown in Fig. 2, the output electricity between AC1 couples of the second DC terminal DC2 of the first ac terminal in more levels full-bridge converters
Pressure is 2E；
When first switch pipe S1 is turned off, second switch pipe S2 conductings, third switching tube S3 is turned off, and the 4th switching tube S4 is opened
Lead to, as shown in figure 3, the output electricity between AC1 couples of the second DC terminal DC2 of the first ac terminal in more levels full-bridge converters
Pressure is E；
When first switch pipe S1 is turned off, the S2 shutdowns of second switch pipe, third switching tube S3 is open-minded, and the 4th switching tube S4 is opened
Lead to, as shown in figure 4, the output electricity between AC1 couples of the second DC terminal DC2 of the first ac terminal in more levels full-bridge converters
Pressure is 0；
As described above, AC1 pairs of the first ac terminal of more levels full-bridge converters the second direct current of DC2 pairs of the second DC terminal
The output voltage of terminal DC2 can be 0, tri- kinds of voltage status of E, 2E, and left and right bridge arm is formed levels full-bridge converter more than one,
The output voltage between the first ac terminal AC1 and the second ac terminal AC2 in more levels full-bridge converters can export -2E, -
E, 0, five kinds of voltage status of E, 2E.
Further, first switch pipe S1, second switch pipe S2, third switching tube S3, the 4th switching tube S4, the 5th switch
Pipe S5, the 6th switching tube S6, the 7th switching tube S7 and the 8th switching tube S8 are IGBT, wherein the first end of each switching tube
It is the collector of IGBT, the second end of each switching tube is the emitter of the drain electrode of NMOS.
It should be noted that IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar crystal
Pipe), the compound full-control type voltage driven type work(being made of BJT (double pole triode) and MOS (insulating gate type field effect tube)
Rate semiconductor devices has advantage of both the high input impedance of MOSFET and the low conduction voltage drop of GTR concurrently.
Further, first switch pipe S1, second switch pipe S2, third switching tube S3, the 4th switching tube S4, the 5th switch
Pipe S5, the 6th switching tube S6, the 7th switching tube S7 and the 8th switching tube S8 are NMOS, wherein the first end of each switching tube
It is the drain electrode of NMOS, the second end of each switching tube is the source electrode of the drain electrode of NMOS.
It should be noted that NMOS (N-Metal-Oxide-Semiconductor, N-type Metal-oxide-semicondutor)
Transistor is one kind in switching tube, in one piece of lower P-type silicon substrate of doping concentration (offer can largely move hole), system
The areas N+ (having a large amount of electron sources that free electron is provided for electric current flowing in the regions N+) for making two high-dopant concentrations, are used in combination metal
Aluminium draws two electrodes, makees drain electrode and source electrode respectively, then covers one layer of very thin silica (SiO2) in semiconductor surface
Insulating layer is leaking --- an aluminium electrode (being typically polysilicon) is loaded on the insulating layer between source electrode, as grid, in substrate
Also an electrode is drawn on as soon as, this constitutes an enhanced metal-oxide-semiconductor of N-channel；
NMOS has the advantages that switching speed is fast, switching loss is small；
Other than NMOS and IGBT, first switch pipe S1 modules S1With second switch pipe S2 modules S2It can also be other
The switching tube of type is selected as needed in actual application.
Further, the first capacitance C1, the second capacitance C2 and third capacitance C3 are polarized capacitance, wherein the first electricity
The first end for holding C1, the second capacitance C2 and third capacitance C3 is the anode of polarized capacitance, the first capacitance C1, the second capacitance C2
Second end with third capacitance C3 is the negative terminal of polarized capacitance.
It should be noted that the capacity of polarized capacitance is bigger, the occasion of high voltage and high power can be suitable for, certainly,
Polarity free capacitor, the application can also be selected not to be particularly limited herein in the application, determined according to actual conditions；
Use the clamped three level bridge arm of single-phase striding capacitance in more levels full-bridge converters provided in this embodiment, two
Five level output voltage states can be generated between ac terminal, the full-bridge converter phase with traditional two level bridge arm of use
Than output voltage capability is doubled, and improves the output voltage grade of isolation type bidirectional DC-DC converters, solves and work as
Full-bridge converter in preceding DC-DC converter can only export two level, make the bidirectional DC-DC converter of realization high-voltage large-capacity
The technical issues of difficulty, application range is restricted.
It is above a kind of another embodiment of more levels full-bridge converters provided in an embodiment of the present invention, is below this hair
A kind of one embodiment for more level isolation type bidirectional DC-DC converters that bright embodiment provides.
Referring to Fig. 5, an embodiment of the present invention provides an a kind of implementations of more level isolation type bidirectional DC-DC converters
Example, including：
Transformer 2 and two more levels full-bridge converters of any one of the above；
First ac terminal of two line ends and levels full-bridge converter 1 more than first of the first side winding of transformer 2
AC1 and the second ac terminal AC2 correspond electrical connection；
First ac terminal of two line ends and levels full-bridge converter 3 more than second of the second side winding of transformer 2
AC1 and the second ac terminal AC2 correspond electrical connection.
Further, transformer 2 is medium-frequency isolation transformer or high-frequency isolation transformer.
It should be noted that the working frequency of intermediate-frequency transformer is higher than 200Hz, it is less than intermediate frequency (10kHz)；
High frequency transformer is the power transformer that working frequency is more than intermediate frequency (10kHz), is mainly used for high frequency switch power
In make high-frequency switch power transformer, be also useful for making high frequency inverter transformation in high frequency inverter and Inverter Welder
Device, by working frequency height, several class can be divided into：10kHz-50kHz、50kHz-100kHz、100kHz-500kHz、
500kHz-1MHz and 10MHz or more.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to before
Stating embodiment, invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to preceding
The technical solution recorded in each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
Modification or replacement, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of more levels full-bridge converters, which is characterized in that including：First switch pipe, second switch pipe, third switching tube,
4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the first diode, the second diode,
Third diode, the 4th diode, the 5th diode, the 6th diode, the 7th diode, the 8th diode, the first capacitance,
Two capacitances and third capacitance；
The first end of first switch pipe, the cathode of the first diode, the first end of the 5th switching tube, the 5th diode cathode and
The first end of third capacitance is electrically connected to each other the first DC terminal of composition；
The second end of 4th switching tube, the anode of the 4th diode, the second end of the 8th switching tube, the anode of the 8th diode and
The second end of third capacitance is electrically connected to each other the second DC terminal of composition；
The cathode of the second end of second switch pipe, the anode of the second diode, the first end of third switching tube and third diode
It is electrically connected to each other the first ac terminal of composition；
The cathode of the second end of 6th switching tube, the first end and the 7th diode of the anode of the 6th diode, the 7th switching tube
It is electrically connected to each other the second ac terminal of composition；
The first end of first capacitance respectively with the second end of first switch pipe, the anode of the first diode, second switch pipe
The cathode of one end and the first diode is electrically connected；
The second end of first capacitance respectively with the second end of third switching tube, the anode of third diode, the 4th switching tube
The cathode of one end and the 4th diode is electrically connected；
The first end of second capacitance respectively with the second end of the 5th switching tube, the anode of the 5th diode, the 6th switching tube
The cathode of one end and the 6th diode is electrically connected；
The second end of second capacitance respectively with the second end of the 7th switching tube, the anode of the 7th diode, the 8th switching tube
The cathode of one end and the 8th diode is electrically connected.
2. a kind of more levels full-bridge converters according to claim 1, which is characterized in that first switch pipe, second switch pipe,
Three switching tubes, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube are IGBT,
In, the first end of each switching tube is the collector of IGBT, and the second end of each switching tube is the transmitting of the drain electrode of NMOS
Pole.
3. a kind of more levels full-bridge converters according to claim 1, which is characterized in that first switch pipe, second switch pipe,
Three switching tubes, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube are NMOS,
In, the first end of each switching tube is the drain electrode of NMOS, and the second end of each switching tube is the source electrode of the drain electrode of NMOS.
4. a kind of more levels full-bridge converters according to claim 1, which is characterized in that the first capacitance, the second capacitance and third
Capacitance is polarized capacitance, wherein the first end of the first capacitance, the second capacitance and third capacitance be polarized capacitance just
End, the second end of the first capacitance, the second capacitance and third capacitance is the negative terminal of polarized capacitance.
5. a kind of more level isolation type bidirectional DC-DC converters, which is characterized in that including：Transformer and two claims 1 to
More levels full-bridge converters described in any one of 4；
The first ac terminal and second of two line ends and levels full-bridge converter more than first of first side winding of transformer
Ac terminal corresponds electrical connection；
The first ac terminal and second of two line ends and levels full-bridge converter more than second of the second side winding of transformer
Ac terminal corresponds electrical connection.
6. a kind of more level isolation type bidirectional DC-DC converters according to claim 5, which is characterized in that transformer is
Medium-frequency isolation transformer or high-frequency isolation transformer.
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| CN111245254A (en) * | 2020-01-15 | 2020-06-05 | 清华大学 | Single-phase direct current port interconnected cascade multilevel converter |
| CN111697628A (en) * | 2020-07-09 | 2020-09-22 | 北京雷动智创科技有限公司 | Photovoltaic electrolyzed water hydrogen production system and control method |
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| WO2016016475A1 (en) * | 2014-08-01 | 2016-02-04 | Eisergy Limited | Power factor correction stages in power conversion |
| CN107465358A (en) * | 2017-07-11 | 2017-12-12 | 江苏固德威电源科技股份有限公司 | Single-phase five-level converter and its modulator approach of use |
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| CN101272088A (en) * | 2008-05-07 | 2008-09-24 | 中国科学院电工研究所 | Back-to-back striding capacitance convertor of wind power generation system |
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| US8411473B2 (en) * | 2010-12-20 | 2013-04-02 | Allis Electric Co., Ltd. | Three-phase power supply with three-phase three-level DC/DC converter |
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