CN206117516U - Multiplication type is based on hypermutation of LLC resonance than high -power two -way DCDC converter - Google Patents
Multiplication type is based on hypermutation of LLC resonance than high -power two -way DCDC converter Download PDFInfo
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- CN206117516U CN206117516U CN201621108747.XU CN201621108747U CN206117516U CN 206117516 U CN206117516 U CN 206117516U CN 201621108747 U CN201621108747 U CN 201621108747U CN 206117516 U CN206117516 U CN 206117516U
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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
Multiplication type is based on hypermutation of LLC resonance than high -power two -way DCDC converter overcomes the limitation that traditional LLC can only the uniflow energy, discloses the two -way flow that a novel two -way LLC topology realized power. Including the former avris circuit of converter, the vice avris circuit of converter, both connect through the transformer, the transformer turn ratio is 1: N converter both sides circuit in still be equipped with resonance circuit, the former avris circuit of converter is full -bridge structure, for the low -pressure end, including S1, S2, S3, four switch tubes of S4, is equipped with mid point A on the bridge arm connecting wire between S1, two switch tubes of S2, is equipped with mid point B on the bridge arm connecting wire between S3, two switch tubes of S4. Can realize not only that the no -voltage is open -minded, the zero current turn -offs, has higher efficiency, can also realize stepping up or stepping down through the adjustment transformer turn ratio. The utility model discloses when the great power of transmission, the input/output gain of converter is obvious, and the voltage regulation of converter can the reinforce.
Description
Technical field
The utility model belongs to electric and electronic technical field, specially a kind of high-power DC/DC converter device.
Background technology
For energy saving, in recent years many researchs are reasonable in concern, the efficient utilization energy.Modern power electronics technology is obtained
Very fast development is arrived.Two-way DC/DC converter techniques, all playing a significant role, are this year the focus studied in many occasions.
Many DC/DC converter topologies are suggested, and wherein isolation type bidirectional DC/DC is mainly used in input and output needs isolation, realize compared with
The occasion of high-voltage variable ratio.Phase-shifting full-bridge DC/DC converters are easier to realize soft using the phase shifting angle transmission energy between former secondary
Switch, and the voltage of switching tube, current stress are less, are suitably applied large-power occasions.But its exist soft-switching range it is narrow, close
The problems such as power-off stream is big, circulating energy is big, so as to have impact on converter whole efficiency.Closest to prior art, traditional LLC can only
For realizing that unidirectional power flows.
Utility model content
The utility model aim to overcome that traditional LLC can only one-way flow energy limitation, it is open a kind of new two-way
LLC topologys are realizing the two-way flow of power.Auxiliary induction is provided with the topology, when forward and reverse runs, converter
Topological structure is identical, and operation logic is also full symmetric.
Technical solutions of the utility model are characterized as：
A kind of high-power bidirectional DC/DC converter, it is characterised in that including converter former limit lateral circuit, converter secondary side
Circuit, both are connected by transformer, and the transformer turns ratio is 1：N, is additionally provided with humorous in the described lateral circuit of converter two
Shake circuit,
The converter former limit lateral circuit is full bridge structure, is low-pressure end, including tetra- switching tubes of S1, S2, S3, S4, S1,
Bridge arm connecting line between two switching tubes of S2 is provided with midpoint A, and the bridge arm connecting line between two switching tubes of S3, S4 is provided with
Midpoint B；
The converter secondary lateral circuit is full bridge structure, is high-pressure side, including tetra- switching tubes of S5, S6, S7, S8, S5,
Bridge arm connecting line between two switching tubes of S6 is provided with midpoint C, and the bridge arm connecting line between two switching tubes of S7, S8 is provided with
Midpoint D；
Described resonance circuit include auxiliary induction Lm2, resonant inductance Lr, magnetizing inductance Lm, resonant capacitance Cr, four according to
Secondary concatenation, the bridge arm connecting line that one end of the auxiliary induction Lm2 is connected between two switching tubes of S1, S2 is provided with midpoint A,
The bridge arm connecting line that the other end of auxiliary induction Lm2 is connected between two switching tubes of S3, S4 is provided with midpoint B；
The magnetizing inductance Lm is in parallel with the low-pressure side of described transformer；
During the bridge arm connecting line that on high-tension side one end of the transformer is connected between two switching tubes of S5, S6 is provided with
Point C, the bridge arm connecting line that the on high-tension side other end of transformer is connected between two switching tubes of S7, S8 is provided with midpoint D.
The utility model is high-power DC/DC converter device, and the LLC resonant converter can realize zero-current switching, can
The problems such as thoroughly to solve circulating energy, turn-off power loss, not only can realize that no-voltage is open-minded, zero-current switching, with higher
Efficiency, can also by adjustment transformer turns ratio realize boosting or be depressured.The utility model becomes when relatively high power is transmitted
Substantially, the Voltage Cortrol ability of converter is strong for the input and output gain of parallel operation.The utility model will be in generation of electricity by new energy extensively
Using being especially widely used in direct-current grid, energy storage device.
Above-mentioned technical proposal, including the two-way LLC power models of above-mentioned two are further improved, two modules have identical
Power and identical parameters, two-way LLC power models are connected in low-pressure side, in parallel in high-pressure side；In each two-way LLC power mould
In block, in the converter secondary lateral circuit, the structure of switching tube S7, S 8 that will be in high-pressure side replaces with electrochemical capacitor multiplication of voltage
Structure.Thus, high-voltage variable ratio and great power bidirectional transmission can be simultaneously realized, pole is applied to high-voltage variable ratio, high-power biography
It is defeated, and require the application scenario of to and fro flow of power.
Description of the drawings
Fig. 1 the utility model topological structure schematic diagrames.
Fig. 2 is the structural representation of embodiment 2.
Specific embodiment
The utility model is described further below in conjunction with drawings and Examples.
Basic embodiment 1
An auxiliary induction is provided with the present embodiment topology, when forward and reverse runs, the topological structure phase of converter
Together, operation logic is also full symmetric.Concrete topological structure is as shown in Figure 1：
A kind of high-power bidirectional DC/DC converter, it is characterised in that including converter former limit lateral circuit, converter secondary side
Circuit, both are connected by transformer, and the transformer turns ratio is 1：N, is additionally provided with humorous in the described lateral circuit of converter two
Shake circuit,
The converter former limit lateral circuit is full bridge structure, is low-pressure end, including tetra- switching tubes of S1, S2, S3, S4, S1,
Bridge arm connecting line between two switching tubes of S2 is provided with midpoint A, and the bridge arm connecting line between two switching tubes of S3, S4 is provided with
Midpoint B；
The converter secondary lateral circuit is full bridge structure, is high-pressure side, including tetra- switching tubes of S5, S6, S7, S8, S5,
Bridge arm connecting line between two switching tubes of S6 is provided with midpoint C, and the bridge arm connecting line between two switching tubes of S7, S8 is provided with
Midpoint D；
Described resonance circuit include auxiliary auxiliary induction Lm2, resonant inductance Lr, magnetizing inductance Lm, resonant capacitance Cr, four
Person is sequentially connected in series, during the bridge arm connecting line that one end of the auxiliary induction Lm2 is connected between two switching tubes of S1, S2 is provided with
The bridge arm connecting line that the other end of point A, auxiliary induction Lm2 is connected between two switching tubes of S3, S4 is provided with midpoint B；
The magnetizing inductance Lm is in parallel with the low-pressure side of described transformer；
During the bridge arm connecting line that on high-tension side one end of the transformer is connected between two switching tubes of S5, S6 is provided with
Point C, the bridge arm connecting line that the on high-tension side other end of transformer is connected between two switching tubes of S7, S8 is provided with midpoint D.
Based on above technical scheme, the utility model converter, in positive work, low-pressure side is used as input, high-pressure side
As output；During reverse operation, used as input, low-pressure side is used as output for high-pressure side.During forward direction work, because being added on Lm2
Voltage, is a positive and negative full symmetric square wave, therefore the auxiliary induction Lm2 of resonant network is not involved in positive LLC resonant process,
Positive process LLC is respectively Lr, Lm, Cr, and high side switch pipe is used as rectifying tube.During reverse operation, different from positive work, become
The magnetizing inductance Lm of depressor is not involved in LLC resonance, and it is Symmetrical square wave to be added in when reverse on static exciter inductance on Lm
Voltage, it is believed that static exciter inductance is not involved in power transmission, the Lr in low-pressure side resonator, Lm2, Cr in reverse operation
Complete LLC resonance.The topological voltage change ratio：
After turn ratio N of transformer is fixed, the topological input and output voltage no-load voltage ratio is adjusted by the resonant frequency change of LLC
The voltage change ratio Mac of whole resonant network.
Embodiment 2
The present embodiment is the further innovation to launching on the basis of the technical scheme of embodiment 1.Its thinking is, by again
Pressure and module connection in series-parallel, while realizing high-voltage variable ratio and great power bidirectional transmission.
Applicable scene：In generation of electricity by new energy, direct-current grid or battery energy storage system, high-voltage variable ratio, high-power biography
Defeated occasion, and require to and fro flow of power.
It is known in the art that LLC resonant converter is when relatively high power is transmitted, input and output voltage gain curve easily becomes
Than shallower, the Voltage Cortrol ability of converter can be deteriorated.There is containing between high power transmission and high-voltage variable ratio
Relation, for this shortcoming of converter, the technical measures that the present embodiment is given are：
The high-pressure side of first LLC adopts the structure of electrochemical capacitor multiplication of voltage, and the traditional LLC that compares topology is identical transmitting
In the case of power, the voltage change ratio of converter is doubled.
Its two be for actual high-power, the application scenarios of high-voltage variable ratio, by two equal-wattages, parameter it is two-way
LLC power models are in parallel in low-pressure side, the mode of high-pressure side series connection so that in the case that converter power output doubles,
Voltage change ratio is also achieved and doubled, in many application scenarios.Due to the technology reality that inverter power and voltage change ratio are doubled simultaneously
Existing difficulty is larger, therefore, it is more rare in practical application in prior art.
First, electrochemical capacitor multiplication of voltage is described as follows：
As shown in Fig. 2 module 1, module 2 are identical, module 1 is illustrated.The Transformer Winding of module 1 is at half
In cycle, only electrochemical capacitor an E2 or E3 are charged, LLC high-pressure sides are adopted in the voltage and embodiment 1 on each point solution electric capacity
It is the same (technology is realized being already belonging to prior art) with full-bridge rectification mode, the high-pressure side of a module uses two electrolysis
Electric capacity E2, E3 connect, therefore high-pressure side output voltage is doubled.
The voltage change ratio of module 1 can be given by formula below：
It can be seen that the mode of the conventional high-tension side full-bridge rectification that compares, voltage change ratio increased one times.This causes single
Module is when equal-wattage is transmitted, it is possible to achieve higher voltage no-load voltage ratio, in some new forms of energy stored energy application scenes, extremely there is application
Value.
2nd, two module connection in series-parallel are described as follows：
It is in parallel in low pressure using the module 1 of two equal-wattage grades and voltage change ratio, module 2, high-pressure side series connection.Low pressure
Side parallel connection can ensure that individual module halves in the electric current of low-pressure side, reduce the current stress of switch tube device, and the design cycle is big
It is big to shorten.High-pressure side is connected and the voltage change ratio of whole converter is doubled, shown in no-load voltage ratio equation below：
Claims (2)
1. a kind of high-power bidirectional DC/DC converter, it is characterised in that including converter former limit lateral circuit, converter secondary side electricity
Road, both are connected by transformer, and the transformer turns ratio is 1：N, in the described lateral circuit of converter two resonance is additionally provided with
Circuit,
The converter former limit lateral circuit is full bridge structure, is low-pressure end, including tetra- switching tubes of S1, S2, S3, S4, S1, S2 two
Bridge arm connecting line between individual switching tube is provided with midpoint A, and the bridge arm connecting line between two switching tubes of S3, S4 is provided with midpoint
B；
The converter secondary lateral circuit is full bridge structure, is high-pressure side, including tetra- switching tubes of S5, S6, S7, S8, S5, S6 two
Bridge arm connecting line between individual switching tube is provided with midpoint C, and the bridge arm connecting line between two switching tubes of S7, S8 is provided with midpoint
D；
Described resonance circuit includes auxiliary induction Lm2, resonant inductance Lr, magnetizing inductance Lm, resonant capacitance Cr, and four go here and there successively
Connect, the bridge arm connecting line that one end of the auxiliary induction Lm2 is connected between two switching tubes of S1, S2 is provided with midpoint A, aid in
The bridge arm connecting line that the other end of inductance Lm2 is connected between two switching tubes of S3, S4 is provided with midpoint B；
The magnetizing inductance Lm is in parallel with the low-pressure side of described transformer；
The bridge arm connecting line that on high-tension side one end of the transformer is connected between two switching tubes of S5, S6 is provided with midpoint C,
The bridge arm connecting line that the on high-tension side other end of transformer is connected between two switching tubes of S7, S8 is provided with midpoint D.
2. high-power bidirectional DC/DC converter as claimed in claim 1, it is characterised in that including two two-way LLC power moulds
Block, two modules have equal-wattage and identical parameters, two-way LLC power models are connected in low-pressure side, in high-pressure side simultaneously
Connection；In each two-way LLC power model, the switching tube S 7, S 8 in the converter secondary lateral circuit replaces with electrolysis electricity
Hold the structure of multiplication of voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621108747.XU CN206117516U (en) | 2016-10-09 | 2016-10-09 | Multiplication type is based on hypermutation of LLC resonance than high -power two -way DCDC converter |
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| CN201621108747.XU CN206117516U (en) | 2016-10-09 | 2016-10-09 | Multiplication type is based on hypermutation of LLC resonance than high -power two -way DCDC converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418436A (en) * | 2018-04-27 | 2018-08-17 | 合肥博鳌电气科技有限公司 | A kind of two-way LLC DC converters and its control method based on half-bridge three-level structure |
| CN108988645A (en) * | 2018-06-28 | 2018-12-11 | 湘潭大学 | A kind of novel soft switch two-way DC-DC converter topology based on LLC resonance |
| CN111404393A (en) * | 2020-06-08 | 2020-07-10 | 北京理工大学深圳汽车研究院 | Vehicle-mounted charging circuit and bidirectional direct current conversion circuit |
-
2016
- 2016-10-09 CN CN201621108747.XU patent/CN206117516U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418436A (en) * | 2018-04-27 | 2018-08-17 | 合肥博鳌电气科技有限公司 | A kind of two-way LLC DC converters and its control method based on half-bridge three-level structure |
| CN108988645A (en) * | 2018-06-28 | 2018-12-11 | 湘潭大学 | A kind of novel soft switch two-way DC-DC converter topology based on LLC resonance |
| CN111404393A (en) * | 2020-06-08 | 2020-07-10 | 北京理工大学深圳汽车研究院 | Vehicle-mounted charging circuit and bidirectional direct current conversion circuit |
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