CN205992859U - A kind of symmetrical two-way DC converter - Google Patents
A kind of symmetrical two-way DC converter Download PDFInfo
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- CN205992859U CN205992859U CN201620864389.9U CN201620864389U CN205992859U CN 205992859 U CN205992859 U CN 205992859U CN 201620864389 U CN201620864389 U CN 201620864389U CN 205992859 U CN205992859 U CN 205992859U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a kind of symmetrical two-way DC converter, in order to solve the problems, such as that prior art breaker in middle device can not quickly be switched on or off, improve the efficiency of two-way DC converter, reduce caloric value simultaneously.Described symmetrical two-way DC converter, including：Isolating transformer and the primary circuit and the secondary circuit that are symmetrically connected to described isolating transformer both sides；Described primary circuit, including：DC filter capacitor that the former limit bridge circuit being connected with the former limit of described isolating transformer is connected with described former limit bridge circuit, the clamp brachium pontis being connected between described former limit bridge circuit and described isolating transformer and be connected to the resonance circuit between two switching device conodes in described former limit bridge circuit and described clamp brachium pontis.
Description
Technical field
This utility model is related to electric and electronic technical field, and more particularly, to one kind is applied in new-energy automobile and energy-storage system
In symmetrical two-way DC converter.
Background technology
In new-energy automobile and energy-storage system, need battery DC voltage is converted to the unidirectional current needed for target device
Pressure.Battery may be at mode of operation of discharging, and provides energy for target device, and battery can also be in charge mode, leads to
Cross target device to absorb energy.Target device includes but is not limited to DC motor controller, DC capacitor, four-quadrant operation
AC/DC commutator, four-quadrant operation DC/AC inverter etc..
Fig. 1 is a kind of two-way DC converter circuit topology in prior art, and this circuit topology passes through buck and boost electricity
The two-way flow being implemented in combination with input and having exported DC side energy on road, this circuit topology is simple and reliable, but this circuit is opened up
Flutter input and the unrealized isolation of output it is impossible to use in the occasion that input and output are required with isolation.
Fig. 2 is another kind of two-way DC converter circuit topology in prior art, and this circuit topology is complete by two-way phase shift
Bridge circuit is realizing the two-way flow of energy, and this circuit topology achieves input and the isolation of output, but this circuit is opened up
Flutterring breaker in middle device can not quickly be switched on or off, once quickly turning off switching device, the inductive element sense of circuit will be led to
Peak voltage should be gone out, switching frequency is higher, turn off faster, this perceptual voltage is higher, and this voltage is added in switching device two ends, easily
Switching device is caused to puncture；Once quickly opening switching device, when switching device is opened under very high voltage, it is stored in
Energy in switching device junction capacity will all be dissipated in this switching device as an electrical current, and switching frequency is higher, opens electricity
Stream spike is bigger, thus leading to switching device to cross cause thermal damage, because switching device can not quickly be switched on or off, leads to efficiency low
Under, and system heat generation ratio is more serious, suitable for application in high-power and efficient occasion.
In sum, in existing two-way DC converter circuit topology, switching device can not quickly be switched on or off, and leads to
Two-way DC converter inefficiency, and it is serious to generate heat.
Utility model content
This utility model embodiment provides a kind of symmetrical two-way DC converter, in order to solve prior art breaker in middle device
The problem that part can not quickly be switched on or off, improves the efficiency of two-way DC converter, reduces caloric value simultaneously.
A kind of symmetrical two-way DC converter that this utility model embodiment provides, including：Isolating transformer and symmetrical
It is connected to primary circuit and the secondary circuit on described isolating transformer both sides；Described primary circuit, including：With described isolation transformation
DC filter capacitor that the former limit bridge circuit that the former limit of device is connected is connected with described former limit bridge circuit, it is connected to institute
State the clamp brachium pontis between former limit bridge circuit and described isolating transformer and be connected to described former limit bridge circuit with described
Resonance circuit between two switching device conodes in clamp brachium pontis.
In the above-mentioned symmetrical two-way DC converter that this utility model embodiment provides, input is realized by isolating transformer
With the isolation of output, and humorous between two switching device conodes in former limit bridge circuit and clamp brachium pontis by being connected to
Shake circuit, it is to avoid when prior art breaker in middle pipe is quickly switched on or off, and the peak voltage of generation and peak current damage and open
The problem closing pipe is it is achieved that Sofe Switch, namely achieves quickly being switched on or off of switching tube, improves two-way DC converter
Efficiency, simultaneously reduce caloric value, further, since the circuit of isolating transformer primary and secondary side is symmetrical, energy forward flow
Circuit and energy back flow circuit can be with common sparing circuit, thus reducing equipment cost and volume.
In a kind of possible embodiment, the above-mentioned symmetrical two-way DC converter that this utility model embodiment provides
In, described former limit bridge circuit includes first switch pipe, second switch pipe, the 3rd switching tube and the 4th switching tube；Described first
Switching tube and described second switch pipe are composed in series the first brachium pontis, and described 3rd switching tube and described 4th switching tube are composed in series
Second brachium pontis, described first brachium pontis and described second brachium pontis are connected in parallel on described DC filter capacitor two ends, and described isolation transformation
The two ends of device primary side winding are connected to described first brachium pontis and the midpoint of described second brachium pontis.
In a kind of possible embodiment, the above-mentioned symmetrical two-way DC converter that this utility model embodiment provides
In, described clamp brachium pontis includes：First switch device and second switch device；Described first switch device and described second switch
Devices in series composition clamp brachium pontis, described clamp brachium pontis and described first brachium pontis and described second brachium pontis are connected in parallel described
DC filter capacitor two ends, and described clamp brachium pontis midpoint be connected with the one end in described isolating transformer primary side winding.
In a kind of possible embodiment, the above-mentioned symmetrical two-way DC converter that this utility model embodiment provides
In, described resonance circuit, including：Resonant capacitance and resonant inductance, described resonant capacitance and described resonant inductance are connected in series in
Between described first brachium pontis midpoint and described clamp brachium pontis midpoint, or described resonant capacitance and described resonant inductance are connected in series
Between described second brachium pontis midpoint and described clamp brachium pontis midpoint.
In a kind of possible embodiment, the above-mentioned symmetrical two-way DC converter that this utility model embodiment provides
In, described first switch pipe, described second switch pipe, described 3rd switching tube and described 4th switching tube are following any one
Kind：Metal-oxide semiconductor (MOS) (Metal Oxide Semiconductor, MOS) field-effect transistor, insulated gate bipolar are brilliant
Body pipe (Insulated Gate Bipolar Transistor, IGBT) and audion, described first switch device and described
Second switch device is diode.
Brief description
Fig. 1 is a kind of circuit topological structure figure of two-way DC converter in prior art；
Fig. 2 is the circuit topological structure figure of another kind of two-way DC converter in prior art；
The circuit topological structure figure of a kind of symmetrical two-way DC converter that Fig. 3 provides for this utility model embodiment；
The circuit topology of energy forward flow in the symmetrical two-way DC converter that Fig. 4 provides for this utility model embodiment
Structure chart；
The circuit topology of energy back flowing in the symmetrical two-way DC converter that Fig. 5 provides for this utility model embodiment
Structure chart.
Specific embodiment
Below in conjunction with the accompanying drawings, being embodied as to a kind of symmetrical two-way DC converter that this utility model embodiment provides
Mode is described in detail.
A kind of symmetrical two-way DC converter that this utility model embodiment provides, as shown in figure 3, include：Isolation transformation
Device 302 and the primary circuit and the secondary circuit that are symmetrically connected to isolating transformer 302 both sides；Primary circuit, including：With isolation
The DC filter capacitor that the former limit bridge circuit 304 that the former limit of transformator 302 is connected is connected with former limit bridge circuit 304
306th, it is connected to the clamp brachium pontis 308 between former limit bridge circuit 304 and isolating transformer 302 and be connected to former limit bridge-type electricity
Resonance circuit 310 between two switching device conodes in road 304 and clamp brachium pontis 308.
It should be noted that the symmetrical two-way DC converter that this utility model embodiment provides is symmetric form, specifically come
Say, the circuit topological structure of the symmetrical two-way DC converter that this utility model embodiment provides is with isolating transformer as axis of symmetry
Symmetrically, in the symmetrical two-way DC converter being provided due to this utility model embodiment, primary circuit, including：With isolation transformation
The first DC filter capacitor that the former limit bridge circuit that the former limit of device is connected is connected with former limit bridge circuit, be connected to former
Between side bridge circuit and isolating transformer first clamps brachium pontis and is connected to former limit bridge circuit and the first clamp brachium pontis
In the first resonance circuit between two switching device conodes；Therefore, secondary circuit, including：Secondary with isolating transformer
The second DC filter capacitor that the secondary bridge circuit being connected is connected with secondary bridge circuit, it is connected to secondary bridge-type electricity
Between road and isolating transformer second clamp brachium pontis and be connected to secondary bridge circuit with second clamp brachium pontis in two open
Close the second resonance circuit between device conode, wherein, the first DC filter capacitor and the second DC filter capacitor are electricity
Container piece, is only used for distinguishing two different capacitor elements herein, similar, first clamp brachium pontis and second clamp brachium pontis,
First resonance circuit and the second resonance circuit are also only used for distinguishing two circuit structures being connected to various location.
Symmetrical bidirectional, dc below still taking the former limit of isolating transformer 302 as a example, to the offer of this utility model embodiment
The circuit structure of changer is described in detail.
In the symmetrical two-way DC converter that this utility model embodiment provides, former limit bridge circuit 304 includes first and opens
Close pipe S11, second switch pipe S12, the 3rd switching tube S13 and the 4th switching tube S14；First switch pipe S11 and second switch pipe
S12 is composed in series the first brachium pontis, and the 3rd switching tube S13 and the 4th switching tube S14 are composed in series the second brachium pontis, the first brachium pontis and
Two brachium pontis are connected in parallel on DC filter capacitor 306 (the electric capacity C11 shown in Fig. 3) two ends, and isolating transformer 302 primary side winding
Two ends are connected to the first brachium pontis and the midpoint of the second brachium pontis.
In the symmetrical two-way DC converter that this utility model embodiment provides, clamp brachium pontis 308 includes：First switch device
Part D21 and second switch device D22；First switch device D21 and second switch device D22 is composed in series clamp brachium pontis, clamp
Brachium pontis and the first brachium pontis and the second brachium pontis are connected in DC filter capacitor 306 (the electric capacity C11 shown in Fig. 3) two ends in parallel,
And the midpoint of clamp brachium pontis is connected with the one end in isolating transformer 302 primary side winding.
In the symmetrical two-way DC converter that this utility model embodiment provides, resonance circuit 310, including：Resonant capacitance
C12 and resonant inductance L11, resonant capacitance C12 and resonant inductance L11 are connected in series in the first brachium pontis midpoint and clamp brachium pontis 308
Between midpoint, or resonant capacitance C12 and resonant inductance L11 is connected in series in the second brachium pontis midpoint and clamp brachium pontis 308 midpoint
Between.Resonance circuit 310 shown in this utility model embodiment Fig. 3 is connected in the second brachium pontis midpoint and clamp brachium pontis 308
Between point, certainly, it will be apparent to a skilled person that in this utility model other embodiments, resonance circuit 310
Can be connected between the first brachium pontis midpoint and clamp brachium pontis 308 midpoint.
In the symmetrical two-way DC converter that this utility model embodiment provides, first switch pipe S11, second switch pipe
S12, the 3rd switching tube S13 and the 4th switching tube S14 be following any one：Metal-oxide semiconductor (MOS) MOS field effect transistor
Pipe, insulated gate bipolar transistor IGBT and audion, first switch device D21 and second switch device D22 is diode.
In the symmetrical two-way DC converter that this utility model embodiment provides, realize inputting and defeated by isolating transformer
The isolation going out, and by being connected to the resonance electricity between two switching device conodes in former limit bridge circuit and clamp brachium pontis
Road, it is to avoid when prior art breaker in middle pipe is quickly switched on or off, the peak voltage of generation and peak current damage switching tube
Problem it is achieved that Sofe Switch, namely achieve quickly being switched on or off of switching tube, improve the effect of two-way DC converter
Rate, reduces caloric value, further, since the circuit of isolating transformer primary and secondary side is symmetrical, energy forward flow circuit simultaneously
Can be with common sparing circuit, thus reducing equipment cost and volume with energy back flow circuit.
The symmetrical two-way DC converter that this utility model embodiment provides, including：First LLC of energy forward flow is humorous
Shake unit and energy back flowing the 2nd LLC resonant element.Wherein, a LLC resonant element is by former limit resonant element, isolation
Transformator and secondary rectification unit composition；2nd LLC resonant element is by secondary rectification unit, isolating transformer and former limit resonance list
Unit's composition, specifically：
As shown in figure 4, a LLC resonant element of energy forward flow by electric capacity C11, switching tube S11, S12, S13,
S14, resonant capacitance C12, resonant inductance L11, isolating transformer T0, switching device D11, D12, switching tube S23, S24, electric capacity
C21 collectively constitutes.Wherein, electric capacity C11 is the input side DC filtering unit of energy forward flow；Switching tube S11, S12, S13,
S14 is the transformer primary side switch element of energy forward flow；Resonant capacitance C12, resonant inductance L11, isolating transformer T0
Primary side winding constitutes the former limit resonant element of energy forward flow；The secondary of isolating transformer T0, switching device D11, D12,
Switching tube S23, S24, electric capacity C21 have collectively constituted the secondary rectification unit of energy forward flow.
As shown in figure 5, energy back flowing the 2nd LLC resonant element by electric capacity C21, switching tube S21, S22, S23,
S24, resonant capacitance C22, resonant inductance L21, isolating transformer T0, switching device D21, D22, switching tube S11, S12, electric capacity
C11 collectively constitutes.Wherein, the input side DC filtering unit that electric capacity C21 flows for energy back；Switching tube S21, S22, S23,
The transformer primary side switch element that S24 flows for energy back；Resonant capacitance C22, resonant inductance L21, isolating transformer T0
Primary side winding constitutes the former limit resonant element of energy back flowing；The secondary of isolating transformer T0, switching device D21, D22,
Switching tube S11, S12, electric capacity C11 have collectively constituted the secondary rectification unit of energy back flowing.
In the symmetrical two-way DC converter that this utility model embodiment provides, will be humorous for a LLC of energy forward flow
Shake unit and energy back flowing the 2nd LLC resonant element combine, electric capacity C11, switching tube S11, S12, isolating transformer
T0, switching tube S23, S24, electric capacity C21 flow in a LLC resonant element of energy forward flow and energy back second
LLC resonant element achieves shared, farthest reduces equipment cost and volume.
In sum, in a kind of symmetrical two-way DC converter that this utility model embodiment provides, by isolating transformation
Device realizes input and the isolation of output, and is saved altogether with two switching devices in clamp brachium pontis by being connected to former limit bridge circuit
Resonance circuit between point, it is to avoid when prior art breaker in middle pipe is quickly switched on or off, the peak voltage of generation and spike
The problem of circuit damage switching tube is it is achieved that Sofe Switch, namely achieves quickly being switched on or off of switching tube, improves two-way
The efficiency of DC converter, reduces caloric value, further, since the circuit of isolating transformer primary and secondary side is symmetrical, energy simultaneously
Amount forward flow circuit and energy back flow circuit can be with common sparing circuit, thus reducing equipment cost and volume.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this practicality to this utility model
New spirit and scope.So, if of the present utility model these modification and modification belong to this utility model claim and
Within the scope of its equivalent technologies, then this utility model is also intended to comprise these changes and modification.
Claims (5)
1. a kind of symmetrical two-way DC converter is it is characterised in that include：Isolating transformer and be symmetrically connected to described isolation
The primary circuit on transformator both sides and secondary circuit；
Described primary circuit, including：The former limit bridge circuit being connected with the former limit of described isolating transformer and described former limit bridge
DC filter capacitor that formula circuit is connected, the clamped bridges being connected between described former limit bridge circuit and described isolating transformer
Arm and be connected to the resonance circuit between two switching device conodes in described former limit bridge circuit and described clamp brachium pontis.
2. symmetrical two-way DC converter according to claim 1 is it is characterised in that described former limit bridge circuit includes
One switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube；
Described first switch pipe and described second switch pipe are composed in series the first brachium pontis, and described 3rd switching tube and the described 4th is opened
Close pipe and be composed in series the second brachium pontis, described first brachium pontis and described second brachium pontis are connected in parallel on described DC filter capacitor two ends, and
The two ends of described isolating transformer primary side winding are connected to described first brachium pontis and the midpoint of described second brachium pontis.
3. symmetrical two-way DC converter according to claim 2 is it is characterised in that described clamp brachium pontis includes：First
Switching device and second switch device；
Described first switch device and described second switch devices in series composition clamp brachium pontis, described clamp brachium pontis and described first
Brachium pontis and described second brachium pontis are connected in described DC filter capacitor two ends in parallel, and the midpoint of described clamp brachium pontis with described
One end in isolating transformer primary side winding is connected.
4. symmetrical two-way DC converter according to claim 3 is it is characterised in that described resonance circuit, including：Resonance
Electric capacity and resonant inductance, described resonant capacitance and described resonant inductance are connected in series in described first brachium pontis midpoint and described clamp
Between brachium pontis midpoint, or described resonant capacitance and described resonant inductance are connected in series in described second brachium pontis midpoint and described pincers
Between the brachium pontis midpoint of position.
5. the symmetrical two-way DC converter according to claim 3 or 4 is it is characterised in that described first switch pipe, described
Second switch pipe, described 3rd switching tube and described 4th switching tube be following any one：MOS field MOS
Effect transistor, insulated gate bipolar transistor IGBT and audion, described first switch device and described second switch device
Part is diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620864389.9U CN205992859U (en) | 2016-08-10 | 2016-08-10 | A kind of symmetrical two-way DC converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620864389.9U CN205992859U (en) | 2016-08-10 | 2016-08-10 | A kind of symmetrical two-way DC converter |
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| Publication Number | Publication Date |
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| CN205992859U true CN205992859U (en) | 2017-03-01 |
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| CN201620864389.9U Active CN205992859U (en) | 2016-08-10 | 2016-08-10 | A kind of symmetrical two-way DC converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900097A (en) * | 2018-09-10 | 2018-11-27 | 西南交通大学 | A kind of controlled resonant converter |
| CN110266194A (en) * | 2019-07-03 | 2019-09-20 | 江苏恰德森科技有限公司 | A kind of bidirectional DC-DC converter of symmetric resonator |
| CN110401352A (en) * | 2019-07-12 | 2019-11-01 | 国创新能源汽车能源与信息创新中心(江苏)有限公司 | A kind of two-way resonance converter |
-
2016
- 2016-08-10 CN CN201620864389.9U patent/CN205992859U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900097A (en) * | 2018-09-10 | 2018-11-27 | 西南交通大学 | A kind of controlled resonant converter |
| CN110266194A (en) * | 2019-07-03 | 2019-09-20 | 江苏恰德森科技有限公司 | A kind of bidirectional DC-DC converter of symmetric resonator |
| CN110266194B (en) * | 2019-07-03 | 2024-05-10 | 江苏恰德森科技有限公司 | Bidirectional DC-DC converter with symmetrical resonant cavities |
| CN110401352A (en) * | 2019-07-12 | 2019-11-01 | 国创新能源汽车能源与信息创新中心(江苏)有限公司 | A kind of two-way resonance converter |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Symmetry bidirectional DC Effective date of registration: 20200629 Granted publication date: 20170301 Pledgee: Industrial Bank Limited by Share Ltd. Xi'an branch Pledgor: Lu Jun Registration number: Y2020980003575 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |