CN101997418A - LLC (liquid level control) type serial-parallel resonant converter - Google Patents
LLC (liquid level control) type serial-parallel resonant converter Download PDFInfo
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- CN101997418A CN101997418A CN200910013345XA CN200910013345A CN101997418A CN 101997418 A CN101997418 A CN 101997418A CN 200910013345X A CN200910013345X A CN 200910013345XA CN 200910013345 A CN200910013345 A CN 200910013345A CN 101997418 A CN101997418 A CN 101997418A
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- llc
- resonant converter
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- parallel resonant
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention discloses an LLC (liquid level control) type serial-parallel resonant converter, which belongs to the technical field of power supply, and relates to the LLC type serial-parallel resonant converter. The invention provides the LLC type serial-parallel resonant converter which works in a frequency range of f0<f<fr. The LLC type serial-parallel resonant converter comprises an LLC type serial-parallel half-bridge resonant converter circuit; main switching tubes S1 and S2 are in complementary conduction at a fixed duty ratio of 0.5; parallel inductors Lm of Lr, Cr and a transformer form an LLC resonant network; and a rectifier diode is directly connected to an output capacitor.
Description
Technical field:
The invention belongs to power technique fields, relate to a kind of LLC type series parallel resonance converter.
Background technology:
Along with the development of modern power electronics technology, Switching Power Supply develops towards high frequencyization, integrated, modularization direction.Improve switching frequency and can reduce volume, improve power density and reliability, the waveform of smooth change and less voltage/current rate of change also help improving the Electro Magnetic Compatibility of system, reduce switching noise.The power resonance converter is basic converter unit with resonant circuit, the periodic zero passage of curtage when utilizing resonance, thereby make switching device under no-voltage or zero current condition, open or turn-off, to realize soft switch, reach the purpose that reduces switching loss, further improve frequency, therefore obtained paying attention to and research.
Summary of the invention:
The present invention is exactly at the problems referred to above, and a kind of LLC type series parallel resonance converter of work in f0＜f＜fr frequency range is provided.
For achieving the above object, the present invention adopts following technical scheme, LLC type connection in series-parallel half bridge resonant transformer circuit of the present invention, main switch S1 and S2 fix the complementary conducting of 0.5 duty ratio, the shunt inductance Lm of Lr, Cr and transformer constitutes the LLC resonant network, and rectifier diode is directly connected on the output capacitance.
Beneficial effect of the present invention:
Resonant network is perception under the condition of switching frequency f0＜f＜fr, help the ZVS of switching tube open-minded, and the discontinuous current of secondary rectifier diode in this frequency range, thus realized the zero-current switching of rectifier diode, eliminated the loss that reverse recovery produces.
And the difference during f＞fr just is because f＞fr Lr and Cr resonance during S2 opens, resonance current ir is greater than exciting curent iLm, S1 turn-offs ir C1, C2 is discharged and recharged ir decline, ir descends rapidly after S2ZVS opens, dropping to ir=iLm does not have energy to be sent to secondary, this moment, the secondary rectifier diode was finished the change of current, begun the course of work of half period symmetry in addition, as seen Lm has neither part nor lot in resonance always, more similarly be common resonance, electric current is continuous on the rectifier diode simultaneously, can be owing to oppositely recover to bring loss during the change of current.
Description of drawings:
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment:
LLC type connection in series-parallel half bridge resonant transformer circuit of the present invention, main switch S1 and S2 are to fix the complementary conducting of 0.5 duty ratio, and the shunt inductance Lm of Lr, Cr and transformer constitutes the LLC resonant network, and rectifier diode is directly connected on the output capacitance.
Resonant network is the capacitive state as can be known when switching frequency f＜f0, is unfavorable for the ZVS switch of switching tube, just do not set off a discussion, below analyze the course of work of LLC resonant circuit with switching frequency scope f0＜f＜fr earlier.
In that f0＜f＜fr frequency range inner conversion device can be because of the load difference, its course of work is also different, Lr becomes one to hold Ceq with the Cr equivalence when circuit working is in f0＜f＜fr scope, whole resonant cavity equivalence be Lm and load parallel connection again with Ceq, it still is that capacitive will be decided according to the weight (Q value size) of frequency and load that the resonant cavity impedance is perception on earth.Utilization Saber software is carrying out emulation to the LLC half bridge resonant transformer, and carries out model analysis.Converter Vin=270V, Vo=360V, rated power 500W, wherein the resonant network parameter is as follows: Lr=27.4 μ, Lm=137 μ, Cr=92.4n.
Claims (2)
1. LLC type series parallel resonance converter, it is characterized in that being LLC type connection in series-parallel half bridge resonant transformer circuit, main switch S1 and S2 fix the complementary conducting of 0.5 duty ratio, the shunt inductance Lm of Lr, Cr and transformer constitutes the LLC resonant network, and rectifier diode is directly connected on the output capacitance.
2. a kind of LLC type series parallel resonance converter according to claim 1 is characterized in that Lr=27.4 μ, Lm=137 μ, Cr=92.4n.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910013345XA CN101997418A (en) | 2009-08-25 | 2009-08-25 | LLC (liquid level control) type serial-parallel resonant converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910013345XA CN101997418A (en) | 2009-08-25 | 2009-08-25 | LLC (liquid level control) type serial-parallel resonant converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101997418A true CN101997418A (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910013345XA Pending CN101997418A (en) | 2009-08-25 | 2009-08-25 | LLC (liquid level control) type serial-parallel resonant converter |
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| Country | Link |
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| CN (1) | CN101997418A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664530A (en) * | 2012-04-27 | 2012-09-12 | 南京航空航天大学 | Soft-switching isolation type switch capacitor regulator |
| CN103296882A (en) * | 2013-05-29 | 2013-09-11 | 浙江大学 | DC-DC (direct-current to direct-current) resonant converter with automatic voltage equalizing function |
| CN103683940A (en) * | 2013-12-13 | 2014-03-26 | 华为技术有限公司 | DC-DC converting circuit, device and working method |
| WO2015062554A1 (en) * | 2013-11-04 | 2015-05-07 | Huawei Technologies Co., Ltd. | Adjustable resonant apparatus, system and method for power converters |
| CN105680299A (en) * | 2016-04-01 | 2016-06-15 | 华北电力大学（保定） | Laser driving circuit of soft-switching inversion circuit |
| WO2017041635A1 (en) * | 2015-08-31 | 2017-03-16 | 董武文 | Polarity-based rectifying and filtering method |
| CN108649794A (en) * | 2018-03-23 | 2018-10-12 | 加码技术有限公司 | A kind of high-voltage power circuit |
| 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 |
| CN109698623A (en) * | 2017-10-20 | 2019-04-30 | 泰达电子股份有限公司 | A kind of power module and power circuit |
| CN110165762A (en) * | 2018-03-09 | 2019-08-23 | 河南机电职业学院 | A kind of urban track traffic ground super capacitor energy storage device |
-
2009
- 2009-08-25 CN CN200910013345XA patent/CN101997418A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664530B (en) * | 2012-04-27 | 2014-12-10 | 南京航空航天大学 | Soft-switching isolation type switch capacitor regulator |
| CN102664530A (en) * | 2012-04-27 | 2012-09-12 | 南京航空航天大学 | Soft-switching isolation type switch capacitor regulator |
| CN103296882A (en) * | 2013-05-29 | 2013-09-11 | 浙江大学 | DC-DC (direct-current to direct-current) resonant converter with automatic voltage equalizing function |
| WO2015062554A1 (en) * | 2013-11-04 | 2015-05-07 | Huawei Technologies Co., Ltd. | Adjustable resonant apparatus, system and method for power converters |
| US9484821B2 (en) | 2013-11-04 | 2016-11-01 | Futurewei Technologies, Inc. | Adjustable resonant apparatus for power converters |
| CN103683940B (en) * | 2013-12-13 | 2017-01-04 | 华为技术有限公司 | A kind of DC-DC transfer circuit, device and method of work |
| CN103683940A (en) * | 2013-12-13 | 2014-03-26 | 华为技术有限公司 | DC-DC converting circuit, device and working method |
| WO2017041635A1 (en) * | 2015-08-31 | 2017-03-16 | 董武文 | Polarity-based rectifying and filtering method |
| CN105680299A (en) * | 2016-04-01 | 2016-06-15 | 华北电力大学（保定） | Laser driving circuit of soft-switching inversion circuit |
| CN105680299B (en) * | 2016-04-01 | 2018-08-21 | 华北电力大学（保定） | A kind of soft switching inverting circuit laser driving circuit |
| CN109698623A (en) * | 2017-10-20 | 2019-04-30 | 泰达电子股份有限公司 | A kind of power module and power circuit |
| CN109698623B (en) * | 2017-10-20 | 2021-11-16 | 泰达电子股份有限公司 | Power module and power circuit |
| US11315723B2 (en) | 2017-10-20 | 2022-04-26 | Delta Electronics (Thailand) Public Company Limited | Power module and power circuit |
| US12062482B2 (en) | 2017-10-20 | 2024-08-13 | Delta Electronics (Thailand) Public Company Limited | Power module and power circuit |
| CN110165762A (en) * | 2018-03-09 | 2019-08-23 | 河南机电职业学院 | A kind of urban track traffic ground super capacitor energy storage device |
| CN110165762B (en) * | 2018-03-09 | 2023-07-18 | 河南机电职业学院 | Urban rail transit ground super capacitor energy storage device |
| CN108649794A (en) * | 2018-03-23 | 2018-10-12 | 加码技术有限公司 | A kind of high-voltage power circuit |
| 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 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110330 |