CN109245541A - Two-way DC converter circuit topological structure - Google Patents
Two-way DC converter circuit topological structure Download PDFInfo
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- CN109245541A CN109245541A CN201811168875.7A CN201811168875A CN109245541A CN 109245541 A CN109245541 A CN 109245541A CN 201811168875 A CN201811168875 A CN 201811168875A CN 109245541 A CN109245541 A CN 109245541A
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- switching tube
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- voltage
- topological structure
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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
- 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
Abstract
The present invention relates to a kind of two-way DC converter circuit topological structure, the circuit topological structure includes high pressure lateral circuit, lower-voltage circuit and the high frequency transformer being connected between high pressure lateral circuit and lower-voltage circuit；Including six switching tubes, two bus capacitors, a high-power inductance, a high frequency transformer, two equalizing resistances and two clamp diodes, there are DC power supply in corresponding two sides.The present invention reduces the usage quantity of controlled tr tube, reduces to the on high-tension side insulating requirements of high frequency transformer, effectively reduce cost；Reflux power is reduced simultaneously, improves whole efficiency, can be widely applied to the high occasion of direct current conversion no-load voltage ratio.
Description
Technical field
The present invention relates to power electronics field more particularly to a kind of two-way DC converter circuit topological structures.
Background technique
In recent years, the new energy such as solar energy, wind energy largely access electric system, but due to the shakiness of generation of electricity by new energy power output
It is qualitative, so that power grid is generated fluctuation after accessing power grid, interference power grid operates normally.And energy-storage system is accessed in systems, lead to
The charge and discharge for crossing control energy-storage system can efficiently use generation of electricity by new energy, improve power supply quality, then propose two-way full-bridge
DC-DC topological structure.
In the double full-bridge topologies proposed, by the phase angle difference between two full-bridge output voltages of control, energy is realized
The two-way flow of amount.But due to two-way full-bridge DC-DC topological structure itself, inevitably emergent power is returned
The problem of stream, thus two-track is proposed on the basis of single phase shift to three the control modes such as shift to reduce power reflux.Simultaneously
Overall structure uses 8 full-controlled switch devices, high expensive.
It is, therefore, desirable to provide a kind of two-way DC converter topological structure suitable for high voltage large velocity ratio.
Summary of the invention
(1) goal of the invention
It is directed to current side high voltage, the application of other side high current, in the structure for enjoying a double blessing bridge, high-pressure side is single
A switching tube will bear biggish voltage stress, simultaneously because the high-pressure side output voltage for bridge of enjoying a double blessing is higher, to high frequency transformer
The higher problem of insulating requirements.The present invention provides a kind of two-way DC converter topological structure, which can be to being applied to
Side high voltage, the occasion of other side high current, while cost can be reduced.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
On the one hand a kind of two-way DC converter circuit topological structure is provided, the circuit topological structure includes high-pressure side
Circuit, lower-voltage circuit and it is connected to high frequency transformer T between high pressure lateral circuit and lower-voltage circuit1；
The high pressure lateral circuit includes that successively series aiding connection is followed by high side power E1The first of both ends~the 4th switch
Pipe, successively series aiding connection is followed by high side power E1The first bus capacitor C at both ends1With the second bus capacitor C2, it is sequentially connected in series
It is followed by high side power E1The first equalizing resistance R at both ends1With the second equalizing resistance R2, and successively the first of series aiding connection
Clamp diode D7With the second clamp diode D8；
The first bus capacitor C1Anode meet high side power E1Anode, the second bus capacitor C2Cathode
Meet high side power E1Cathode；
The first clamp diode D7Cathode meet first switch tube S1With second switch S2Between, second pincers
Position diode D8Anode meet third switching tube S3With the 4th switching tube S4Between；
The first switch tube S1Positive collector electrode meet high side power E1Anode, the 4th switching tube S4Emitter
Meet high side power E1Cathode, the second switch S2With third switching tube S3Indirect output terminal；
The lower-voltage circuit includes the 5th switching tube S5, the 6th switching tube S6And low-side power E2；
The high frequency transformer T1Including the high-voltage winding with high-pressure side circuit connection, connect with lower-voltage circuit around
Group and lower winding；
One end of the upper winding passes through the 5th switching tube S5It is connected to low-side power E2Anode, other end under around
One end connection of group is followed by low-side power E2Cathode, the other end of the lower winding passes through the 6th switching tube S6It is connected to
Low-side power E2Anode；
The 5th switching tube S5Collector meet low-side power E2Anode and the 6th switching tube S6Collector；
Described high-voltage winding one end connects the output terminal, and other end is connected to the first equalizing resistance R respectively1With second
Equalizing resistance R2Between, the first bus capacitor C1With the second bus capacitor C2Between, the first clamp diode D7With the second clamp two
Pole pipe D8Between.
Optionally, described high-voltage winding one end passes through power inductance L1Connect the output terminal.
Preferably, the first bus capacitor C1With the second bus capacitor C2Capacitance size it is equal.
Preferably, the first equalizing resistance R1With the second equalizing resistance R2Resistance value is equal.
Optionally, the first clamp diode D7With the second clamp diode D8, it is fast recovery diode or Schottky
Diode.
Optionally, the switching tube is full-controlled switch device, including field effect transistor or insulated gate bipolar crystal
Pipe.
Optionally, equal one diode of reverse parallel connection of the described first to the 6th switching tube, i.e., the described switching tube S1Current collection
Pole connects the cathode of the diode, the switching tube S1Emitter connect the anode of the diode.
On the other hand, the present invention provides a kind of two-way DC converter, including two-way DC converter circuit as described above
Topological structure controls the conducting of at least one switching tube in the two-way DC converter, according to driving signal to export
Voltage needed for stating DC converter.
Optionally,
In synchronization, in high pressure lateral circuit, the driving signal controls any two in first to fourth switching tube
Switching tube conducting, any one in lower-voltage circuit, driving signal the 5th switching tube of control and the 6th switching tube are opened
Close pipe conducting.
(3) beneficial effect
The invention has the following advantages:
1. a kind of two-way DC converter topological structure proposed by the present invention, lower-voltage circuit is used only two full-control types and opens
Guan Guan reduces the usage quantity of wholly-controled device, reduces costs relative to full bridge structure.
2. high pressure lateral circuit of the present invention uses single-phase tri-level circuit, the voltage stress of single switching transistor is reduced, simultaneously
High-pressure side exports the half that maximum voltage is high voltage bus voltage, can effectively reduce the requirement of the insulation to high frequency transformer, drops
Low high frequency transformer manufacture difficulty.
3. the dual use for shifting to control method can effectively reduce reflux power, overall efficiency is promoted.
Detailed description of the invention
Fig. 1 is a kind of two-way DC converter circuit topological structure schematic diagram of the present invention；
Fig. 2 is that tradition is enjoyed a double blessing bridge structural schematic diagram；
Fig. 3 is a kind of two-way DC converter switching signal of the present invention and output waveform figure；
Fig. 4 is a kind of two-way DC converter Artificial switch signal timing diagram of the present invention；
Fig. 5 is a kind of two-way DC converter simulation data waveform diagram of the present invention.
Specific embodiment
In order to preferably explain the present invention, in order to understand, below by specific embodiment, present invention work is retouched in detail
It states.
Embodiment one
As shown in Figure 1, a kind of two-way DC converter circuit topological structure of the present embodiment, including six switching tubes, two
Bus capacitor, a high-power inductance, a high frequency transformer, two equalizing resistances and two clamp diodes, corresponding high frequency
The DC power supply of transformer two sides.
Specifically, the circuit topological structure includes: high pressure lateral circuit, lower-voltage circuit and is connected to high-pressure side and low
Press high frequency transformer T between lateral circuit1。
High pressure lateral circuit is tri-level half-bridge structure, and the lower-voltage circuit is push-pull configuration；The high frequency transformer T1
Including primary and secondary side, the primary side is close to one side of high pressure lateral circuit, and the pair side is close to one side of lower-voltage circuit.
The high pressure lateral circuit tri-level half-bridge structure include: successively series aiding connection be followed by high side power E1Both ends
First~the 4th switching tube, successively series aiding connection is followed by high side power E1The first bus capacitor C at both ends1With the second bus
Capacitor C2, successively series aiding connection is followed by high side power E1The first equalizing resistance R at both ends1With the second equalizing resistance R2, and
Successively the first clamp diode D of series aiding connection7With the second clamp diode D8。
Wherein, the first bus capacitor C1With the second bus capacitor C2Voltage be high side power E1Half
Preferably, the first bus capacitor C1With the second bus capacitor C2Capacitance size it is equal.
First equalizing resistance R1With the second equalizing resistance R2For guaranteeing that the first bus capacitor and the second bus capacitor voltage are flat
Weighing apparatus.To guarantee equalizing effect, the first equalizing resistance R1With the second equalizing resistance R2Resistance value it is equal.The first bus capacitor C1
Anode meet high side power E1Anode, the first bus capacitor C1Cathode meet the second bus capacitor C2Anode, described second
Bus capacitor C2Cathode meet high side power E1Cathode.
The first clamp diode D7Cathode meet first switch tube S respectively1Emitter and second switch S2Collection
Electrode, the first clamp diode D7Anode meet the second clamp diode D8Cathode, the second clamp diode D8Anode
Meet third switching tube S respectively3Emitter and the 4th switching tube S4Collector.
The first switch tube S1Collector meet high side power E1Anode, first switch tube S1Emitter connect
Two switching tube S2Collector, third switching tube S3Collector meet second switch S2Emitter, third switching tube S3Hair
Emitter-base bandgap grading meets the 4th switching tube S4Collector, the 4th switching tube S4Emitter meet high side power E1Cathode.
The second switch S2Emitter and third switching tube S3Collector indirect output terminal.
The high frequency transformer T1Primary side be high-voltage winding.The high frequency transformer T1Secondary side be double winding, including it is upper
Winding and lower winding.Wherein, with the high-voltage winding of high-pressure side circuit connection, the upper winding being connect with lower-voltage circuit and lower winding
Upper terminal be Same Name of Ends.
Described high-voltage winding one end connects the output terminal, and other end is connected to the first equalizing resistance R respectively1With second
Equalizing resistance R2Between, the first bus capacitor C1Cathode and the second bus capacitor C2Anode between, the first clamp diode D7
Anode and the second clamp diode D8Cathode between.
That is, the first bus capacitor C1With the second bus capacitor C2Midpoint, the first equalizing resistance R1With the second equalizing resistance R2
Midpoint and the first clamp diode D7With the second clamp diode D8Midpoint tie in a bit.
Optionally, high-voltage winding one end connection passes through power inductance L1Connect the output terminal.
In the present embodiment, power inductance L can be saved by suitably increasing the leakage inductance size of high frequency transformer1。
The first clamp diode D7With the second clamp diode D8, select fast recovery diode or two pole of Schottky
Pipe.
The lower-voltage circuit push-pull configuration, lower-voltage circuit include the 5th switching tube S5, the 6th switching tube S6And low pressure
Side power supply E2。
The high frequency transformer T1Upper winding one end pass through the 5th switching tube S5It is connected to low-side power E2Anode,
Other end connect with one end of lower winding and is followed by low-side power E2Cathode, the other end of the lower winding passes through the
Six switching tube S6It is connected to low-side power E2Anode.
The collector of the 5th switching tube S5 meets low-side power E2Anode and the 6th switching tube S6 collector；
Preferably, the switching tube is full-controlled switch device, including field effect transistor or insulated gate bipolar crystal
Pipe.
Optionally, equal one diode of reverse parallel connection of the described first to the 6th switching tube, i.e., the described switching tube (S1) collection
Electrode connects the cathode of the diode, the switching tube (S1) emitter connect the anode of the diode.
If the non-integrated diode of the switching tube itself, is both needed to other anti-paralleled diode.
Compared to full bridge structure shown in Fig. 2, the present embodiment low-pressure side is used only two full-controlled switch pipes, reduces full control
The usage quantity of type device, reduces costs.The voltage stress of single switching transistor is reduced, while high-pressure side output voltage is height
The half for pressing busbar voltage, can effectively reduce the requirement of the insulation to high frequency transformer, reduces high frequency transformer manufacture difficulty.
Corresponding to high pressure lateral circuit, synchronization, four switching tube S1~S4Only there are two add Continuity signal；Switching tube S1
And S2It simultaneously turns on, half bridge voltage output E1/ 2, switching tube S2And S3It simultaneously turns on, half bridge voltage output 0, switching tube S3With
S4It simultaneously turns on, half bridge voltage output is-E1/ 2, high frequency transformer two sides switching tube driving signal and corresponding output voltage are such as
Shown in table 1, since maximum output voltage is E1/ 2, the only half of high voltage power supply, high frequency transformer insulation processing need to only press
According to maximum E1/ 2 processing, reduce insulating requirements；Simultaneously because output voltage is E1/ 2 and-E1When/2, there are 2 switching tubes
It shares simultaneously, reduces the voltage stress of single tube；Switching tube S1And S4180 ° of phase angle mutual deviation, switching tube S2And S3Phase angle mutual deviation
180°；Switching tube S1And S3Complementation conducting, S2And S4Complementation conducting, can pass through control switch pipe S1、S2With switching tube S3、S4Together
When time for being connected change half-bridge output power size.
Corresponding to lower-voltage circuit, synchronization, two switching tube S5、S6Only one plus Continuity signal.
Switching tube S5Conducting, output voltage E2, switching tube S6Conducting, output voltage are-E2, high frequency transformer two sides are opened
It closes pipe driving signal and corresponding output voltage is as shown in table 1；Square wave is exported relative to primary side output square wave by controlling secondary side
Phase angle difference, can control inductance L1Two sides voltage, and then control the size of delivering power and direction between primary side pair side.
Table 1:
| S1 | S2 | S3 | S4 | S5 | S6 | uAB | up |
| 0 | 1 | 1 | 0 | 0 | 1 | 0 | -1 |
| 1 | 1 | 0 | 0 | 0 | 1 | 1 | -1 |
| 0 | 1 | 1 | 0 | 1 | 0 | 0 | 1 |
| 0 | 0 | 1 | 1 | 1 | 0 | -1 | 1 |
| 0 | 1 | 1 | 0 | 0 | 1 | 0 | -1 |
| 1 | 1 | 0 | 0 | 0 | 1 | 1 | -1 |
| 0 | 1 | 1 | 0 | 1 | 0 | 0 | 1 |
| 0 | 0 | 1 | 1 | 1 | 0 | -1 | 1 |
。
Wherein, S1~S6In, 1 indicates conducting, and 0 indicates to be not turned on.uABIn, 1 indicates E1/2。upIn, 1 indicates E2/ N, N are
The no-load voltage ratio of high frequency transformer transformer, uABFor in topological structure shown in Fig. 1, voltage between A point and B point, upFor high frequency transformation
The voltage of device primary side.
In the present embodiment, by the dual use for shifting to control method, reflux power can effectively reduce, promote complete machine effect
Rate.
Embodiment two
A kind of two-way DC converter, which is characterized in that including two-way DC converter circuit topology knot as described in Figure 1
Structure, the two-way DC converter control the conducting of three switching tubes in the two-way DC converter according to driving signal,
With voltage needed for exporting the DC converter.
The two-way DC converter S1~S6Driving signal as shown in figure 3, first to fourth switching tube control
Signal, by regular turn in order and shutdown is modulated, there are two switching tubes to be connected for synchronization.High pressure lateral circuit, in synchronization,
Only there are two conductings in first to fourth switching tube；Lower-voltage circuit, synchronization, in the 5th switching tube and the 6th switching tube only
There is a conducting.
Model is built using simulation of power electronic software, simulation result is as shown in Figure 4 and Figure 5, wherein Fig. 4 is the present invention
Middle Artificial switch signal timing diagram.The control signal of first to fourth switching tube, according to required delivering power size and
Direction, turn in order and shutdown.
In high pressure lateral circuit, the driving signal controls first to fourth switching tube by the regular turn in order of modulation and pass
Disconnected, synchronization has the conducting of any two switching tube；
In lower-voltage circuit, the driving signal controls the 5th switching tube and the 6th switching tube according to required delivering power
Size and Orientation, turn in order and shutdown.
Simulation data waveform diagram is as shown in Figure 5.
Finally, it should be noted that above-described embodiments are merely to illustrate the technical scheme, rather than to it
Limitation；Although the present invention is described in detail referring to the foregoing embodiments, those skilled in the art should understand that:
It can still modify to technical solution documented by previous embodiment, or to part of or all technical features into
Row equivalent replacement；And these modifications or substitutions, it does not separate the essence of the corresponding technical solution various embodiments of the present invention technical side
The range of case.
Claims (9)
1. a kind of two-way DC converter circuit topological structure, which is characterized in that the circuit topological structure includes high-pressure side electricity
Road, lower-voltage circuit and it is connected to high frequency transformer (T between high pressure lateral circuit and lower-voltage circuit1)；
The high pressure lateral circuit includes that successively series aiding connection is followed by high side power (E1) both ends the first~the 4th switching tube,
Successively series aiding connection is followed by high side power (E1) both ends the first bus capacitor (C1) and the second bus capacitor (C2), successively
Series connection is followed by high side power (E1) both ends the first equalizing resistance (R1) and the second equalizing resistance (R2), and successively in the same direction
Concatenated first clamp diode (D7) and the second clamp diode (D8)；
First bus capacitor (the C1) anode meet high side power (E1) anode, the second bus capacitor (C2) it is negative
Pole meets high side power (E1) cathode；First clamp diode (the D7) cathode meet first switch tube (S1) and second open
Close pipe (S2) between, the second clamp diode (D8) anode meet third switching tube (S3) and the 4th switching tube (S4) between；
First switch tube (the S1) collector meet high side power (E1) anode, the 4th switching tube (S4) emitter connect high pressure
Side power supply (E1) cathode, the second switch (S2) and third switching tube (S3) indirect output terminal；
The lower-voltage circuit includes the 5th switching tube (S5), the 6th switching tube (S6) and low-side power (E2)；
High frequency transformer (the T1) it include high-voltage winding with high-pressure side circuit connection, the upper winding being connect with lower-voltage circuit
With lower winding；
One end of the upper winding passes through the 5th switching tube (S5) it is connected to low-side power (E2) anode, other end under around
One end connection of group is followed by low-side power (E2) cathode, the other end of the lower winding passes through the 6th switching tube (S6)
It is connected to low-side power (E2) anode；5th switching tube (the S5) collector meet low-side power (E2) anode and the
Six switching tube (S6) collector；
Described high-voltage winding one end connects the output terminal, and other end is connected to the first equalizing resistance (R respectively1) and second
Piezoresistance (R2) between, the first bus capacitor (C1) and the second bus capacitor (C2) between, the first clamp diode (D7) and second
Clamp diode (D8) between.
2. topological structure according to claim 1, which is characterized in that
Described high-voltage winding one end passes through power inductance (L1) the connection output terminal.
3. topological structure according to claim 1, which is characterized in that
First bus capacitor (the C1) and the second bus capacitor (C2) capacitance size it is equal.
4. topological structure according to claim 1, which is characterized in that
First equalizing resistance (the R1) and the second equalizing resistance (R2) resistance value is equal.
5. topological structure according to claim 1, which is characterized in that
First clamp diode (the D7) and the second clamp diode (D8), it is fast recovery diode or Schottky diode.
6. topological structure according to claim 1, which is characterized in that
The switching tube is full-controlled switch device, including field effect transistor or insulated gate bipolar transistor.
7. topological structure according to claim 1 or 2, which is characterized in that
Equal one diode of reverse parallel connection of described first to the 6th switching tube, i.e., the described switching tube (S1) collector connect described two
The cathode of pole pipe, the switching tube (S1) emitter connect the anode of the diode.
8. a kind of two-way DC converter, which is characterized in that opened up including any two-way DC converter circuit of such as claim 1-7
Structure is flutterred, the conducting of at least one switching tube in the two-way DC converter is controlled according to driving signal, described in output
Voltage needed for DC converter.
9. DC converter according to claim 8, which is characterized in that
In synchronization, in high pressure lateral circuit, the driving signal controls any two switch in first to fourth switching tube
Pipe conducting, in lower-voltage circuit, the driving signal controls any one switching tube in the 5th switching tube and the 6th switching tube
Conducting.
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| CN112564525A (en) * | 2020-11-23 | 2021-03-26 | 南京南瑞继保电气有限公司 | Multi-level converter topology suitable for medium-high voltage occasions and control method |
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Application publication date: 20190118 |