CN208272856U - A kind of bipolar soft-switching commutator transformer with redundant ability - Google Patents
A kind of bipolar soft-switching commutator transformer with redundant ability Download PDFInfo
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- CN208272856U CN208272856U CN201721588770.8U CN201721588770U CN208272856U CN 208272856 U CN208272856 U CN 208272856U CN 201721588770 U CN201721588770 U CN 201721588770U CN 208272856 U CN208272856 U CN 208272856U
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Abstract
The utility model provides a kind of bipolar soft-switching commutator transformer with redundant ability, including one or more switching capacity series resonance transforming circuit unit, every switching capacity series resonance transforming circuit unit includes the medium voltage side circuit and low-voltage direct lateral circuit of H bridge structure, wherein low-voltage direct lateral circuit includes two concatenated uncontrollable rectifier bridges, draws bipolarity DC voltage.More switching capacity series resonance transforming circuit units are connected in medium voltage side circuit, in lower-voltage circuit parallel connection.More switching capacity series resonance transforming circuit units make commutator transformer have redundant ability；It exchanges link and uses Sofe Switch resonance, improve commutator transformer efficiency；Bipolarity DC voltage is drawn using two uncontrollable rectifier bridges, the application scenarios of commutator transformer has been expanded, has enhanced application power.
Description
Technical field
The invention belongs to technical field of electric power, are related to transformer, in particular to a kind of bipolar soft-switching direct current transformation
Device.
Background technique
In recent years, with the development of high-power electric and electronic component and its control technology, pass through Technics of Power Electronic Conversion skill
Art realizes that the novel transformer-- electric power electric transformer (PET) of voltage transformation and energy transmission has obtained more and more passes
Note.Scholar headed by Virginia, US power electronics center FredC.Lee systematically proposes the concept of commutator transformer.
Commutator transformer works under the equivalent duty ratio for connecing 100%, and output eliminates filter inductance, and structure is simple；Using open loop control
System, is easily achieved Sofe Switch, can further improve switching frequency, improves power density.Both directly DC/DC transformer can be led to
Closed-loop control is crossed to apply in pressure regulation and the DC application occasion for needing to be isolated, it can also be straight at two by DC/DC transformer application
Between streaming system, the effect of the power supply systems such as distributed and two-level configuration voltage regulator module and Aviation Static Inverter is improved
Rate and power density.
In low pressure low capacity field, DC/DC converter has been obtained comparing and has been widely applied, for high-frequency isolation type DC/
There has also been tremendous developments for DC converter (IBDC).But current DC/DC converter will lead to DC capacitor and discharge rapidly, generate compared with
Big overcurrent；And after fault clearance, need to recharge DC capacitor, becomes the Dynamic- Recovery process of direct current system
Slowly.In energy transport, when both ends DC voltage and transformer voltage ratio mismatch in the presence of very big circulation, and then cause
Very big current stress, lower efficiency, this is also the technical bottleneck of current limitation DC/DC converter large-scale application.And base
In double active full-bridges (DAB) multiplex commutator transformer scheme when carrying out system-level direct current networking, due to DC bus electricity
Pressure can have fluctuation, so that each subelement both ends DC voltage and transformer voltage ratio mismatch, reduce the operation of commutator transformer
Efficiency.
Bidirectional, dc transformer (as shown in Figure 1) in prior art is tied using the topology of double active full-bridges (DAB)
Structure will not generate overcurrent, DC capacitor although this bidirectional, dc transformer can be cut off from failure by locking pulse
Will not discharge, after failure vanishes system can fast quick-recovery, but this bidirectional, dc transformer Sofe Switch scarce capacity needs
The device used is more, at high cost；Meanwhile this bidirectional, dc transformer can not form bipolarity low-voltage direct end, limit
Its application power.
Summary of the invention
The shortcomings and deficiencies of prior art are solved, the present invention proposes a kind of bipolar soft-switching with redundant ability
Commutator transformer, by, using two uncontrollable rectifier bridge series connection, drawing bipolarity DC voltage in low-pressure side, enhancing using energy
Power.Meanwhile the exchange link of commutator transformer of the invention uses Sofe Switch resonance scheme, improves system effectiveness.
The technical solution of commutator transformer of the invention is as follows: commutator transformer includes that N number of switching capacity series resonance becomes
It changes circuit unit SCSRC (Switched capacitor series resonant converter), N is any positive integer.
First switching capacity series resonance inverter unit SCSRC medium voltage side is connected by inductance L with the anode of middle pressure DC side；The
Medium voltage side second connection end and N platform switching capacity string of N-1 platform switching capacity series resonance inverter unit SCSRC
The first connection terminal of medium voltage side for joining resonant transform circuit cell S CSRC is connected；N platform switching capacity series resonance transformation electricity
Medium voltage side second connection end of road cell S CSRC is connected with the cathode of middle pressure DC side；The transformation of N platform switching capacity series resonance
The low-pressure side of circuit unit SCSRC pass through two uncontrollable rectifier bridges draw bipolarity DC voltage+VLV in parallel, 0 ,-
VLV.Realize that N platform switching capacity series resonance inverter unit SCSRC connects in medium voltage side, low-pressure side is in parallel.
Every switching capacity series resonance inverter unit SCSRC includes 5 switching tube S1 with anti-paralleled diode
~S5,8 diode M1~M8,2 high-frequency isolation transformers T1 and T2,2 resonant capacitances Cs1 and Cs2,3 DC capacitors
C1, C2 and C3.As shown in Fig. 2, each element connects into H bridge structure in medium voltage side, do not controlled at low-pressure side composition concatenated two whole
Bridge is flowed, bipolarity DC voltage+VLV, 0 ,-VLV are drawn.
By adopting the above technical scheme, the beneficial effects of the present invention are:
1), when a switching capacity series resonance inverter unit SCSRC breaks down, by bypassing failure SCSRC,
So that commutator transformer of the invention has redundant ability.
2), the topological structure of commutator transformer of the invention uses Sofe Switch resonance scheme, and switching tube is enabled to begin
Work improves commutator transformer system effectiveness in Sofe Switch state eventually.
3) two uncontrollable rectifier bridges, are used and draw bipolarity DC voltage, have expanded the application scenarios of commutator transformer,
Enhance application power.
Detailed description of the invention
Fig. 1 is the commutator transformer topology diagram of the prior art.
Fig. 2 is the topological structure of bipolar soft-switching commutator transformer one embodiment that the present invention has redundant ability
Figure.
Fig. 3 is the topological structure that the present invention has another embodiment of the bipolar soft-switching commutator transformer of redundant ability
Figure.
Specific embodiment
Specific embodiments of the present invention are further discussed below in conjunction with technical solution of the present invention and attached drawing.
Bipolar soft-switching commutator transformer with redundant ability of the invention, such as Fig. 2, shown in 3.Integrated bipole is soft
Switch DC transformer includes N number of switching capacity series resonance inverter unit SCSRC (Switched capacitor
Series resonant converter), N is any positive integer.First switching capacity series resonance inverter unit
SCSRC medium voltage side is connected by inductance L with the anode of middle pressure DC side；N-1 platform switching capacity series resonance translation circuit list
Medium voltage side second connection end of first SCSRC and the medium voltage side of N platform switching capacity series resonance inverter unit SCSRC
One connection terminal is connected；Medium voltage side second connection end of N platform switching capacity series resonance inverter unit SCSRC is in
The cathode of DC side is pressed to be connected；The low-pressure side of N platform switching capacity series resonance inverter unit SCSRC passes through two and does not control
Rectifier bridge draws bipolarity DC voltage+VLV in parallel, 0 ,-VLV.Realize N platform switching capacity series resonance translation circuit list
First SCSRC connects in medium voltage side, and low-pressure side is in parallel.
In the first embodiment, as shown in Figure 2.Switching capacity series resonance inverter unit SCSRC includes that 5 bands are anti-
Switching tube S1~S5 of parallel diode, 8 diode M1~M8,2 high-frequency isolation transformers T1 and T2,2 resonant capacitances
Cs1 and Cs2,3 DC capacitors C1, C2 and C3.The collector of switching tube S1, S3, the emitter of switching tube S5 are connected to switch
The first terminal of capacitance series resonance inverter unit SCSRC；The cathode of the emitter of switching tube S2, S4, DC capacitor C1
It is connected to the Second terminal of switching capacity series resonance inverter unit SCSRC；The collector of switching tube S5 is connected to direct current
The anode of capacitor C1；The emitter of switching tube S1 is connect with the collector of switching tube S2, forms the first tie point；Switching tube S3's
Emitter is connect with the collector of switching tube S4, forms the second tie point；Diode M1, M2 series connection, diode M3, M4 series connection；
The anode pole extraction DC voltage+VLV in parallel of the cathode of diode M1, M3 and DC capacitor C2；Diode M2, M4 anode with
0 pole of DC voltage is drawn in the cathode parallel connection of DC capacitor C2；Diode M5, M6 series connection, diode M7, M8 series connection；Diode M5,
The cathode of M7 extraction DC voltage 0 pole in parallel with the anode of DC capacitor C3；Anode and the DC capacitor C3 of diode M6, M8
Cathode parallel connection draw the pole DC voltage-VLV；The anode of diode M1 connect to form third connection with the cathode of diode M2
Point；The anode of diode M3 connect to form the 4th tie point with the cathode of diode M4；Anode and the diode M6 of diode M5
Cathode connect to form the 5th tie point；The anode of diode M7 connect to form the 6th tie point with the cathode of diode M8；The
One, the second tie point is connect with the high-pressure side windings in series of resonant capacitance Cs1 and high-frequency isolation transformer T1；First, second
Tie point is connect with the high-pressure side windings in series of resonant capacitance Cs2 and high-frequency isolation transformer T2；Third, the 4th tie point with
The low-pressure side windings in series of high-frequency isolation transformer T1 connects；The low pressure of five, the 6th tie points and high-frequency isolation transformer T2
The connection of side windings in series.
When certain switching capacity series resonance inverter unit SCSRC breaks down, enabled driving pulse makes S5
Be constantly in off state, S1~S4 is constantly in closed state, then failure SCSRC is bypassed, and then entire bipolar soft is opened
It closes commutator transformer and has redundancy properties.
By the PWM modulation of switching tube S1~S5, voltage on adjustable capacitor C1, and then switching capacity series resonance
The DC voltage at the both ends inverter unit SCSRC and the no-load voltage ratio of transformer T1 and T2 match always, so that switching tube S1
~S4 always works in Sofe Switch state, and then improves entire bipolar soft-switching commutator transformer efficiency.
Meanwhile entire bipolar soft-switching commutator transformer low-pressure side is drawn bipolar using two uncontrollable rectifier bridge series connection
Property DC voltage+VLV, 0 ,-VLV enhance application power so that the application scenarios of commutator transformer are expanded.
In another embodiment, other than above-described embodiment topological structure, bipolar soft-switching direct current of the invention
The exchange link of transformer can also be made of a three winding high frequency transformer T and a resonant capacitance Cs, as shown in Figure 3.
Each switching capacity series resonance inverter unit SCSRC still include 5 switching tube S1 with anti-paralleled diode~
S5,8 diode M1~M8 and 3 DC capacitors C1, C2 and C3.First, second tie point and resonant capacitance Cs and three
The high-pressure side windings in series of winding high frequency transformer T connects；The low pressure of third, the 4th tie point and three winding high frequency transformer T
The connection of the first windings in series of side；The second windings in series of low-pressure side of five, the 6th tie points and three winding high frequency transformer T connect
It connects.
The bipolar soft-switching commutator transformer with redundant ability of above-described embodiment, by using two in low-pressure side
The series connection of uncontrollable rectifier bridge, draws bipolarity DC voltage, enhances application power.More switching capacity series resonance translation circuits
The structure of cell S CSRC designs, and has redundant ability；Meanwhile the exchange link of commutator transformer uses Sofe Switch resonance side
Case improves system effectiveness.
Although person of ordinary skill in the field is it should be understood that can be with according to above embodiment described the present invention
The present invention is realized by modification in the spirit and scope of the appended claims.All such changes and modifications, which are intended to, falls into institute
In attached the scope of the claims.Therefore, example and attached drawing are considered to be illustrative rather than restrictive.
Claims (11)
1. a kind of Sofe Switch commutator transformer, including one or more switching capacity series resonance inverter unit SCSRC, institute
State the medium voltage side DC circuit and low-voltage direct side electricity that switching capacity series resonance inverter unit SCSRC includes H bridge structure
Road, it is characterised in that: low-voltage direct lateral circuit includes two concatenated uncontrollable rectifier bridges, draws bipolarity DC voltage.
2. Sofe Switch commutator transformer as described in claim 1, it is characterised in that: more switching capacity series resonance transformation electricity
The positive phase that first the first connecting pin of SCSRC medium voltage side DC circuit passes through inductance L and middle pressure DC side in the cell S CSRC of road
Even；Medium voltage side DC circuit second connection end of N-1 platform SCSRC and the medium voltage side DC circuit first of N platform SCSRC connect
Connecting terminal is connected；Medium voltage side DC circuit second connection end of N platform switching capacity series resonant converter SCSRC and middle pressure
The cathode of DC side is connected；Straightening stream lateral circuit cascaded structure in formation, wherein N is the positive integer more than or equal to 2.
3. Sofe Switch commutator transformer as claimed in claim 1 or 2, it is characterised in that: every switching capacity series connection is humorous
Shake inverter unit SCSRC H bridge structure medium voltage side DC circuit include 5 switching tube S1 with anti-paralleled diode~
S5,1 DC capacitor C1.
4. Sofe Switch commutator transformer as claimed in claim 3, it is characterised in that: every switching capacity series resonance becomes
The low-voltage direct lateral circuit for changing circuit unit SCSRC includes 8 diode M1~M8,2 high-frequency isolation transformer T1 and T2, and 2
A resonant capacitance Cs1 and Cs2 and 2 DC capacitor C2, C3 form two concatenated uncontrollable rectifier bridges, and it is straight to draw bipolarity
Galvanic electricity pressure.
5. Sofe Switch commutator transformer as claimed in claim 4, it is characterised in that: the collector of described switching tube S1, S3, institute
The emitter for stating switching tube S5 is connected to the first terminal of the switching capacity series resonant converter SCSRC；The switching tube
The emitter of S2, S4, the DC capacitor C1 cathode be connected to the second of the switching capacity series resonant converter SCSRC
Terminal；The collector of the switching tube S5 is connected to the anode of the DC capacitor C1；The emitter of the switching tube S1 and institute
The collector connection for stating switching tube S2, forms the first tie point；The collection of the emitter of the switching tube S3 and the switching tube S4
Electrode connection, forms the second tie point.
6. Sofe Switch commutator transformer as claimed in claim 5, it is characterised in that: diode M1, M2 series connection, described two
The series connection of pole pipe M3, M4；The cathode of described diode M1, M3 extraction DC voltage+VLV in parallel with the anode of the DC capacitor C2
Pole；0 pole of positive extraction DC voltage in parallel with the cathode of the DC capacitor C2 of described diode M2, M4；The diode
M5, M6 series connection, diode M7, M8 series connection；The cathode of described diode M5, M7 are in parallel with the anode of the DC capacitor C3
Draw 0 pole of DC voltage；The anode extraction DC voltage-in parallel with the cathode of the DC capacitor C3 of described diode M6, M8
The pole VLV；The anode of the diode M1 connect to form third tie point with the cathode of the diode M2；The diode M3's
The positive cathode with the diode M4 connect to form the 4th tie point；The anode of the diode M5 is with the diode M6's
Cathode connects to form the 5th tie point；The anode of the diode M7 connect to form the 6th connection with the cathode of the diode M8
Point.
7. Sofe Switch commutator transformer as claimed in claim 6, it is characterised in that: first tie point, the second tie point
It is connect with the high-pressure side windings in series of the resonant capacitance Cs1 and the high-frequency isolation transformer T1；First tie point,
Second tie point is connect with the high-pressure side windings in series of the resonant capacitance Cs2 and the high-frequency isolation transformer T2；It is described
Third tie point, the 4th tie point are connect with the low-pressure side windings in series of the high-frequency isolation transformer T1；5th connection
Point, the 6th tie point are connect with the low-pressure side windings in series of the high-frequency isolation transformer T2.
8. Sofe Switch commutator transformer as claimed in claim 3, it is characterised in that: every switching capacity series resonance becomes
The low-voltage direct lateral circuit for changing circuit unit SCSRC includes 8 diode M1~M8,1 three winding high frequency transformer T, and one
Resonant capacitance Cs and 2 DC capacitors C2, C3 form two concatenated uncontrollable rectifier bridges, draw bipolarity DC voltage.
9. Sofe Switch commutator transformer as claimed in claim 8, it is characterised in that: the collector of described switching tube S1, S3, institute
The emitter for stating switching tube S5 is connected to the first terminal of the switching capacity series resonant converter SCSRC；The switching tube
The emitter of S2, S4, the DC capacitor C1 cathode be connected to the second of the switching capacity series resonant converter SCSRC
Terminal；The collector of the switching tube S5 is connected to the anode of the DC capacitor C1；The emitter of the switching tube S1 and institute
The collector connection for stating switching tube S2, forms the first tie point；The collection of the emitter of the switching tube S3 and the switching tube S4
Electrode connection, forms the second tie point.
10. Sofe Switch commutator transformer as claimed in claim 9, it is characterised in that: diode M1, M2 series connection, it is described
Diode M3, M4 series connection；The cathode of described diode M1, M3 extraction DC voltage in parallel with the anode of the DC capacitor C2+
The pole VLV；0 pole of positive extraction DC voltage in parallel with the cathode of the DC capacitor C2 of described diode M2, M4；Two pole
Pipe M5, M6 series connection, diode M7, M8 series connection；The anode of the cathode of described diode M5, M7 and the DC capacitor C3 are simultaneously
Connection draws 0 pole of DC voltage；The anode extraction direct current in parallel with the cathode of the DC capacitor C3 of described diode M6, M8
The pole pressure-VLV；The anode of the diode M1 connect to form third tie point with the cathode of the diode M2；The diode
The anode of M3 connect to form the 4th tie point with the cathode of the diode M4；Anode and the diode of the diode M5
The cathode of M6 connects to form the 5th tie point；The anode of the diode M7 connect to form the 6th with the cathode of the diode M8
Tie point.
11. Sofe Switch commutator transformer as claimed in claim 10, it is characterised in that: first tie point, the second connection
Point is connect with the high-pressure side windings in series of the resonant capacitance Cs and the three winding high frequency transformer T；The third connection
Point, the 4th tie point are connect with the first windings in series of low-pressure side of the three winding high frequency transformer T；5th tie point,
6th tie point is connect with the second windings in series of low-pressure side of the three winding high frequency transformer T.
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| CN201721588770.8U CN208272856U (en) | 2017-11-24 | 2017-11-24 | A kind of bipolar soft-switching commutator transformer with redundant ability |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968570A (en) * | 2017-11-24 | 2018-04-27 | 清华大学 | A kind of bipolar soft-switching commutator transformer with redundant ability |
| CN110350797A (en) * | 2019-06-27 | 2019-10-18 | 西安交通大学 | A kind of very bipolar mesolow transformer topology and its control strategy based on TAB |
| CN112234828A (en) * | 2020-09-17 | 2021-01-15 | 浙江大学 | Multi-active-bridge power electronic transformer and soft start method thereof |
| CN113612370A (en) * | 2021-08-20 | 2021-11-05 | 苏州浪潮智能科技有限公司 | Circuit, method and device for switching loss of buck power supply |
| CN116760303A (en) * | 2023-08-24 | 2023-09-15 | 国网浙江省电力有限公司电力科学研究院 | High-voltage direct-current transformer and fault redundancy control method thereof |
-
2017
- 2017-11-24 CN CN201721588770.8U patent/CN208272856U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968570A (en) * | 2017-11-24 | 2018-04-27 | 清华大学 | A kind of bipolar soft-switching commutator transformer with redundant ability |
| CN110350797A (en) * | 2019-06-27 | 2019-10-18 | 西安交通大学 | A kind of very bipolar mesolow transformer topology and its control strategy based on TAB |
| CN112234828A (en) * | 2020-09-17 | 2021-01-15 | 浙江大学 | Multi-active-bridge power electronic transformer and soft start method thereof |
| CN113612370A (en) * | 2021-08-20 | 2021-11-05 | 苏州浪潮智能科技有限公司 | Circuit, method and device for switching loss of buck power supply |
| CN116760303A (en) * | 2023-08-24 | 2023-09-15 | 国网浙江省电力有限公司电力科学研究院 | High-voltage direct-current transformer and fault redundancy control method thereof |
| CN116760303B (en) * | 2023-08-24 | 2023-12-26 | 国网浙江省电力有限公司电力科学研究院 | High-voltage direct-current transformer and fault redundancy control method thereof |
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