CN209233731U - A kind of two-way LLC resonance DC-DC converter of holohedral symmetry type - Google Patents
A kind of two-way LLC resonance DC-DC converter of holohedral symmetry type Download PDFInfo
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- CN209233731U CN209233731U CN201822276941.4U CN201822276941U CN209233731U CN 209233731 U CN209233731 U CN 209233731U CN 201822276941 U CN201822276941 U CN 201822276941U CN 209233731 U CN209233731 U CN 209233731U
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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 two-way LLC resonance DC-DC converter of holohedral symmetry type, including transformer, transformer side is equipped with the first circuit, and the other side is equipped with second circuit；First circuit includes being connected into a manner of full-bridge by four switching tubes into the first bridge arm circuit, and the first bridge arm circuit connects the first resonant inductance and the first resonant capacitance, the first resonant inductance and the first resonant capacitance are composed in series the first resonant cavity；Second circuit includes being connected into a manner of full-bridge by four switching tubes into the second bridge arm circuit, and the second bridge arm circuit connects the second resonant inductance and the second resonant capacitance, the second resonant inductance and the second resonant capacitance are composed in series the second resonant cavity；First bridge arm circuit, the first resonant cavity, transformer, the second resonant cavity and the second bridge arm circuit are composed in series loop of power circuit, switch equal parasitic diode in tube body and are rectified as rectifier diode.
Description
Technical field
The present invention relates to a kind of two-way DC-DC converters, and in particular to a kind of two-way LLC resonance of holohedral symmetry type is straight
Stream-DC converter.
Background technique
LLC circuit is for carrying out power transmission, the advantage high with efficiency of transmission, power density is high, thus becomes present
The mainstream circuit of design, is widely used.But common LLC topology does not have the function, more of bidirectional power transmission
Add the function of not having two-way LLC work.
It meanwhile being all side using hard switching when two-way DC-DC converter way traffic under the conditions of the prior art
Formula, is lost larger, due to voltage spikes stress height, and EMC effect is poor.
The topological structure of existing LLC circuit is all by the way of metal-oxide-semiconductor anti-paralleled diode, and topological device is excessive, electricity
Line structure is extremely complex, influences raising and the PCB layout of power density.
Forward and reverse switching is carried out under existing topological condition needs to add corresponding by-pass switch to realize.Meanwhile it is existing
Under condition and topological condition, output rectifying part is not carried out synchronous rectification, and using diode rectification, larger, diode is lost
It is serious to be easy fever.
Summary of the invention
The purpose of the utility model is to provide a kind of two-way DC-DC converters, realize two-way Sofe Switch, and operation is high
Efficiency, switching loss is low, while power density improves.
One embodiment of the utility model provides a kind of two-way LLC resonance DC-DC converter of holohedral symmetry type, packet
Transformer is included, transformer side is equipped with the first circuit, and the other side is equipped with second circuit；First circuit include by first switch tube,
Second switch, third switching tube and the 4th switching tube are connected into a manner of full-bridge into the first bridge arm circuit, the first bridge arm
The first resonant inductance of circuit connection and the first resonant capacitance, the first resonant inductance and the first resonant capacitance are composed in series the first resonance
Chamber；Second circuit includes being connected in a manner of full-bridge by the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube
At forming the second bridge arm circuit, the second bridge arm circuit connects the second resonant inductance and the second resonant capacitance, the second resonant inductance and
Second resonant capacitance is composed in series the second resonant cavity；First bridge arm circuit, the first resonant cavity, transformer, the second resonant cavity and
Two bridge arm circuits are composed in series loop of power circuit, switch equal parasitic diode in tube body and are rectified as rectifier diode.
Compared with prior art, DC-DC converter provided by the utility model, has the advantages that
1. being used as rectifier diode in switch tube body endoparasitism diode to be rectified, two-way Sofe Switch is realized.It is real
The economic benefits and social benefits operation high efficiency of circuit is showed, switching loss is low, while power density improves.
2. reducing the anti-paralleled diode of original circuit, the space for decreasing PCB and device wire are reduced costs
Difficulty.
3. transformer not only can isolate and transmit the effect of energy, also have the function of inductance and pressure regulation.
4. making full use of the resonant cavity on both sides simultaneously, primary side switch pipe ZVS, secondary side rectifying tube ZCS are realized in forward direction operation.
5. the resonant element on former pair side works normally when forward and reverse, does not need switch and switch over, while there is filter
The effect of wave and blocking.
6. as long as not needing to carry out other controller issues the corresponding metal-oxide-semiconductor of driving signal driving when forward and reverse operation
Switching.
7. keep former secondary side resonance frequency consistent by parameter setting, the gain characteristic on former pair side, the working characteristics such as structure are complete
It is complete consistent.
8. secondary side rectification function can be determined neatly according to voltage.When High voltage output carry out metal-oxide-semiconductor body diode into
Row rectification, low-voltage, high-current can be used metal-oxide-semiconductor when exporting and synchronize rectification.
9. all using controllability field-effect tube, the utilization efficiency of device is very high when work, controls also non-flexible.
Detailed description of the invention
Fig. 1 show one embodiment of the two-way LLC resonance DC-DC converter of holohedral symmetry type of the utility model
Circuit diagram.
Specific embodiment
It is specific below in conjunction with the utility model to keep the purpose of this utility model, technical solution and advantage clearer
Technical solutions of the utility model are clearly and completely described in embodiment and corresponding attached drawing.
Referring to Fig. 1, in one embodiment of the utility model, the two-way LLC resonance DC-DC converting of holohedral symmetry type
Device may include transformer T1, and the side transformer T1 is equipped with the first circuit, and the other side is equipped with second circuit；First circuit include by
First switch tube Q1, second switch Q2, third switching tube Q3 and the 4th switching tube Q4 are connected into a manner of full-bridge into
One bridge arm circuit, the first bridge arm circuit connect the first resonant inductance L1 and the first resonant capacitance C1, the first resonant inductance L1 and the
One resonant capacitance C1 is composed in series the first resonant cavity；Second circuit includes being opened by the 5th switching tube Q5, the 6th switching tube Q6, the 7th
It closes pipe Q7 and the 8th switching tube Q8 to be connected into a manner of full-bridge into the second bridge arm circuit, the connection second of the second bridge arm circuit is humorous
Vibration inductance L2 and the second resonant capacitance C3, the second resonant inductance L2 and the second resonant capacitance C3 is composed in series the second resonant cavity；The
One bridge arm circuit, the first resonant cavity, transformer, the second resonant cavity and the second bridge arm circuit are composed in series loop of power circuit, switching tube
Equal parasitic diode is used as rectifier diode and is rectified in ontology.
Referring to Fig. 1, the first circuit is power input in one embodiment of the utility model, second circuit is
Power output end.
In one embodiment of the utility model, switching tube is metal-oxide-semiconductor.
In one embodiment of the utility model, switching tube is silicon carbide mos pipe.
In one embodiment of the utility model, switching tube is IGBT switching device.
In one embodiment of the utility model, the first resonant cavity, the second resonant cavity are identical as the frequency of switching tube.
Referring to Fig. 1, in one embodiment of the utility model, one end of the first bridge arm circuit and input power anode
Connection, the other end are connect with power cathode；One end of second bridge arm circuit is connect with input power anode, and the other end and power supply are negative
Pole connection.
Referring to Fig. 1, diode cathode is connect with the pole switching tube S, diode in one embodiment of the utility model
Cathode is connect with the pole switching tube D.
Referring to Fig. 1, the first resonant inductance L1 is connected to first switch tube Q1 in one embodiment of the utility model
The pole S and the pole third switching tube Q3D junction；First resonant capacitance C1 is connected to the pole S and the 4th switch of second switch Q2
The pole pipe Q4D junction.
Referring to Fig. 1, the second resonant inductance L2 is connected to the 6th switching tube Q6 in one embodiment of the utility model
The pole S and the 8th pole switching tube Q8D junction；Second resonant capacitance is connected to the pole S and the 7th switching tube of the 5th switching tube Q5
The pole Q7D junction.
As shown in Figure 1, the work of the side A is equal to humorous in resonant switched mode, switching frequency when energy is transmitted to the side B from the side A
The natural resonance frequency of vibration chamber A；When High voltage output, switching tube Q5~Q8 work of the side B is in diode rectification mode, low pressure output
When, switching tube Q5~Q8 of the side B works in synchronous rectification mode；It is when energy is transmitted to the side A from the side B, then just opposite.
Since the switching frequency of the natural resonance frequency and switching tube Q1~Q8 of resonant cavity A, B is consistent, so work
Realize that no-voltage is open-minded in the switching tube of resonant switched mode, the switching tube to work under rectification mode realizes Zero Current Switch.
So no matter forward and reverse operational efficiency is all very high.
No matter energy from A effluent to the side B or B effluent to the side A, can work on resonance point, realize Sofe Switch.Together
When different rectification operating modes can also be selected according to the height of output voltage and the size of power, realize truly
Bidirectional high-efficiency operation.
The converter circuit of the utility model is used as rectifier diode in switch tube body endoparasitism diode and is rectified,
Realize two-way Sofe Switch.The economic benefits and social benefits operation high efficiency of circuit is realized, switching loss is low, while power density improves.It reduces
The anti-paralleled diode of original circuit, reduces costs the difficulty in the space and device wire that decrease PCB.
Transformer not only can isolate and transmit the effect of energy, also have the function of inductance and pressure regulation.It is sufficiently sharp simultaneously
With the resonant cavity on both sides, primary side switch pipe ZVS, secondary side rectifying tube ZCS are realized in forward direction operation.
The resonant element on former pair side works normally when forward and reverse, does not need switch and switches over, while having filtering
With the effect of blocking.As long as controller issues driving signal and drives corresponding metal-oxide-semiconductor when forward and reverse operation, do not need to carry out other
Switching.
Keep former secondary side resonance frequency consistent by parameter setting, the gain characteristic on former pair side, the working characteristics such as structure are complete
Unanimously.
Secondary side rectification function can be determined neatly according to voltage.The progress of metal-oxide-semiconductor body diode is carried out when High voltage output
Rectification, low-voltage, high-current can be used metal-oxide-semiconductor when exporting and synchronize rectification.
All using controllability field-effect tube, the utilization efficiency of device is very high when work, controls also non-flexible.It is all made of
With the fast metal-oxide-semiconductor for restoring body diode.Metal-oxide-semiconductor serves as the function of switching device in forward direction, and fast recovery two is served as when reversed
The function of pole pipe；
Although being made that detailed description to the utility model with above-mentioned preferred embodiment, above-described embodiment is not used
Limit the utility model.Those skilled in the art is not it should be recognized that departing from skill given by technical solutions of the utility model
In the case where art feature and range, to increase made by technical characteristic, with the replacement of some same contents in this field, this should all be belonged to
The protection scope of utility model.
Claims (10)
1. a kind of two-way LLC resonance DC-DC converter of holohedral symmetry type, it is characterised in that: including transformer, the transformer
Side is equipped with the first circuit, and the other side is equipped with second circuit；First circuit include by first switch tube, second switch,
Third switching tube and the 4th switching tube are connected into a manner of full-bridge into the first bridge arm circuit, the first bridge arm circuit connection
First resonant inductance and the first resonant capacitance, first resonant inductance and the first resonant capacitance are composed in series the first resonant cavity；
The second circuit includes being connected in a manner of full-bridge by the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube
It is connected into and forms the second bridge arm circuit, the second bridge arm circuit second resonant inductance of connection and the second resonant capacitance, described second
Resonant inductance and the second resonant capacitance are composed in series the second resonant cavity；First bridge arm circuit, the first resonant cavity, transformer,
Second resonant cavity and the second bridge arm circuit are composed in series loop of power circuit, and parasitic diode is used as rectification in the switch tube body
Diode is rectified.
2. the two-way LLC resonance DC-DC converter of holohedral symmetry type according to claim 1, it is characterised in that: described
One circuit is power input, and the second circuit is power output end.
3. the two-way LLC resonance DC-DC converter of holohedral symmetry type according to claim 1, it is characterised in that: described to open
Guan Guanwei metal-oxide-semiconductor.
4. the two-way LLC resonance DC-DC converter of holohedral symmetry type according to claim 1, it is characterised in that: described to open
Guan Guanwei silicon carbide mos pipe.
5. the two-way LLC resonance DC-DC converter of holohedral symmetry type according to claim 1, it is characterised in that: described to open
Guan Guanwei IGBT switching device.
6. the two-way LLC resonance DC-DC converter of holohedral symmetry type according to claim 1, it is characterised in that: described
One resonant cavity, the second resonant cavity are identical as the frequency of the switching tube.
7. the two-way LLC resonance DC-DC converter of holohedral symmetry type according to claim 1, it is characterised in that: described
One end of one bridge arm circuit is connect with input power anode, and the other end is connect with power cathode；The one of second bridge arm circuit
End is connect with input power anode, and the other end is connect with power cathode.
8. the two-way LLC resonance DC-DC converter of holohedral symmetry type according to claim 1, it is characterised in that: described two
Pole pipe anode is connect with the pole the switching tube S, and the diode cathode is connect with the pole the switching tube D.
9. the two-way LLC resonance DC-DC converter of holohedral symmetry type according to claim 1, it is characterised in that: described
One resonant inductance is connected to the pole S and the pole third switching tube D junction of the first switch tube；The first resonant capacitance connection
In the pole S and the 4th pole switching tube D junction of the second switch.
10. the two-way LLC resonance DC-DC converter of holohedral symmetry type according to claim 1, it is characterised in that: described
Second resonant inductance is connected to the pole S and the 8th pole switching tube D junction of the 6th switching tube；Second resonant capacitance connects
It is connected to the pole S and the 7th pole switching tube D junction of the 5th switching tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822276941.4U CN209233731U (en) | 2018-12-29 | 2018-12-29 | A kind of two-way LLC resonance DC-DC converter of holohedral symmetry type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822276941.4U CN209233731U (en) | 2018-12-29 | 2018-12-29 | A kind of two-way LLC resonance DC-DC converter of holohedral symmetry type |
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| Publication Number | Publication Date |
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| CN209233731U true CN209233731U (en) | 2019-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822276941.4U Active CN209233731U (en) | 2018-12-29 | 2018-12-29 | A kind of two-way LLC resonance DC-DC converter of holohedral symmetry type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868074A (en) * | 2019-10-18 | 2020-03-06 | 江苏固德威电源科技股份有限公司 | Fixed-frequency synchronous rectification bidirectional DC/DC converter and power electronic equipment applying same |
| CN111342665A (en) * | 2020-02-24 | 2020-06-26 | 华中科技大学 | Isolated bidirectional DC-DC converter and control method thereof |
-
2018
- 2018-12-29 CN CN201822276941.4U patent/CN209233731U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868074A (en) * | 2019-10-18 | 2020-03-06 | 江苏固德威电源科技股份有限公司 | Fixed-frequency synchronous rectification bidirectional DC/DC converter and power electronic equipment applying same |
| CN111342665A (en) * | 2020-02-24 | 2020-06-26 | 华中科技大学 | Isolated bidirectional DC-DC converter and control method thereof |
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