CN104716844A - Input-parallel output-parallel modularized direct current converter with soft switch - Google Patents
Input-parallel output-parallel modularized direct current converter with soft switch Download PDFInfo
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- CN104716844A CN104716844A CN201510117942.2A CN201510117942A CN104716844A CN 104716844 A CN104716844 A CN 104716844A CN 201510117942 A CN201510117942 A CN 201510117942A CN 104716844 A CN104716844 A CN 104716844A
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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
Abstract
The invention provides an input-parallel output-parallel modularized direct current converter with a soft switch to solve the problem that zero-voltage switching is difficult to achieve when a lagging bridge arm in an input-series output-parallel phase-shifted full-bridge converter is slightly loaded. The converter is applied to a large-current occasion, switching loss can be further reduced, conversion efficiency is improved, the zero-voltage switching purpose is achieved, and the converter can be automatically suitable for different input currents, output currents and loads. A full-range soft switch of the phase-shifted full-bridge converter can be obtained, the efficiency of the whole converter is improved, the converter is suitable for the conversion occasion from large current input to large current output, and the requirements for the wide input current range, the wide output current range and the wide load change range are met.
Description
Technical field
The present invention relates to the application of electric and electronic technical field in electric power system, particularly relate to a kind of input Parallel opertation parallel modular DC converter with Sofe Switch.
Background technology
Along with the development of social demand, the big current input switch type converters of different capacity grade has penetrated into the industry-by-industry of national economy.Due to the restriction of power device, big current input power can not equally with conventional topologies design, and needs to adopt the novel control method of novel topologies to realize the change of large input current.The occasion of big current input High-current output type is applicable to by parallel DC-DC convertor module combined of input Parallel opertation, input Parallel opertation parallel modular DC converter has relevant research, but the research be mostly confined to control method, seldom studies the soft switch technique of input Parallel opertation parallel connection converter.
Summary of the invention
The present invention not easily realizes to overcome when lagging leg is in underloading in the phase-shifted full-bridge converter inputting Parallel opertation parallel connection the problem that no-voltage opens (zvs), propose under one is applied in big current occasion, there is the input Parallel opertation parallel modular DC converter of Sofe Switch.
The described main circuit with the input Parallel opertation parallel modular DC converter of Sofe Switch as shown in Figure 1, in parallel by input by two identical isolated phase-shifted full-bridge converter modules, the form of output parallel connection is formed, the former limit of full-bridge converter module high frequency transformer is the full-bridge circuit be made up of four controlled metal-oxide-semiconductors, Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 etc. are metal-oxide-semiconductor, wherein Q1-Q4 is the first phase-shifting full-bridge conversion module, Q5-Q8 is the second phase-shifting full-bridge conversion module, wherein Q1, Q3, Q5, Q7 forms leading-bridge, Q2, Q4, Q6, Q8 forms lagging leg.
Two identical LC networks are formed by an inductance and a Capacitance parallel connection, are respectively Cr1, Lr1 and Cr2, Lr2, can realize the no-voltage conducting of each switching tube.Two identical input capacitance Cd1, Cd2 play the effect of input dividing potential drop, respectively bear 1/2 of input voltage.Two high frequency transformer T1, T2 parameters are identical, and transformer secondary is two groups of bridge rectifiers exporting rectifier diode D1-D4, D5-D6 and form, and two groups of output inductors Lf1, Lf2, and parameter is also identical.
Because this DC converter is connected to LC resonant type soft-switch, switching loss can be reduced further, improve conversion efficiency.Zero-pressure is open-minded; Can automatically adapt to different input currents, output current and load.The gamut Sofe Switch of phase-shifted full-bridge converter can be realized according to the present invention, improve the efficiency of whole converter; Be applicable to the conversion occasion that big current is input to High-current output, and meet wide input current scope, broad output current scope, wide load variations.
Accompanying drawing explanation
Fig. 1 is the input Parallel opertation parallel modular DC converter structure chart of band Sofe Switch.
Embodiment
Fig. 1 is the phase shifting control strategy that the DC converter being with the input Parallel opertation parallel modular DC converter of Sofe Switch involved in the present invention adopts polarity discriminating, this DC converter be input as direct voltage Uin, former limit is the full-bridge circuit being input as positive voltage, adopt phase shifting control, under certain loading condition, by leakage inductance parameter and two ends, the metal-oxide-semiconductor drain-source pole capacitance parameter of Design of Transformer, the software that can realize each switching tube leads to.Detailed process is as follows:
The drive singal of switching tube Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 meets following relation, the drive singal of leading-bridge Q1, Q7 is identical, the drive singal of Q3, Q5 is identical, is respectively the PWM complementary signal that duty ratio is 0.5, there is dead band between two groups of signals.And the drive singal of lagging leg Q2, Q8 is identical, the drive singal of Q4, Q6 is identical, to be also duty ratio be 0.5 PWM complementary signal, there is dead band between two groups of signals.
When lagging leg Q2, Q8 drive singal control two pipes turn off simultaneously time, ip1 and ir1 simultaneously with C2, C4 resonance, there is resonance with C6, C8 in ip2 and ir2 simultaneously.Subsequently, C2, C8 charging voltage rises to Vin/2, and C4, C6 are discharged to 0, and the diode current flow of brachium pontis Q4, Q6 now, it is open-minded that Q4, Q6 realize no-voltage.
When leading-bridge Q1, Q7 drive singal control two pipes turn off simultaneously time, ip1 and ir2 simultaneously with C1, C3 resonance, ip2 and ir1 C5 and C7 generation simultaneously resonance.Subsequently, C1, C7 charging voltage rises to Vin/2, and C3, C5 are discharged to 0, and the diode current flow of brachium pontis Q3, Q5 now, it is open-minded that Q3, Q5 realize no-voltage.Half period switching tube is similar to front half period in addition.
On first phase-shifting full-bridge conversion module leading-bridge pipe drive singal rising edge to pipe drive singal under lagging leg rising edge between be phase shifting angle, regulate the size of phase shifting angle to determine current amplitude size in action time of two LC network both end voltage in parallel and two LC networks, thus control the output voltage of phase-shifting transformer.Phase shifting angle increases, and output voltage reduces, and in LC network in parallel, current amplitude increases; Otherwise phase shifting angle reduces, output voltage increases, and the current amplitude in LC network in parallel reduces.
When exporting as constant voltage, input voltage raises and causes phase shifting angle to increase, thus the current amplitude in LC network in parallel increases, and the no-voltage more easily realizing each switching tube is open-minded.When output voltage is constant and load reduces, phase shifting angle increases, and the current amplitude now in LC network increases people, and the no-voltage realizing each switching tube is open-minded.In output voltage change and output resistance is constant time, output voltage increases, and phase shifting angle reduces, and LC mesh current in parallel reduces, but now transformer leakage inductance electric current still to realize the no-voltage of switching tube open-minded.Along with output voltage reduces, power output also reduces, and phase shifting angle increases, and the current amplitude of LC network in parallel increases, and now Sofe Switch is realized by the electric current of LC network.
Claims (3)
1. the input Parallel opertation parallel modular DC converter with Sofe Switch, it is characterized in that this transformer configuration is made up of 2 isolated form high frequency dc to dc converter submodules, input side is parallel-connection structure, and outlet side is parallel-connection structure.
2. according to right 1, submodule selects high-frequency isolation type single stage converter topology, it is characterized by the former limit of high frequency transformer is the full-bridge circuit be made up of four controlled metal-oxide-semiconductors, secondary is diode rectification, and electric capacity and filter capacitor after filtering after rectification, finally obtain VD.
3. submodule full-bridge circuit according to claim 2, it is characterized in that, between the mid point and the mid point of the second full-bridge circuit transformer primary side lagging leg of the advanced arm of the first full-bridge circuit transformer primary side, access a LC network in parallel, the position of Cr1 and Lr1 is interchangeable; Access another LC network in parallel at the second full-bridge circuit advanced arm mid point and the first full-bridge circuit lagging leg mid point, the position of Lr2 and Cr2 can exchange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510117942.2A CN104716844A (en) | 2015-03-18 | 2015-03-18 | Input-parallel output-parallel modularized direct current converter with soft switch |
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| CN201510117942.2A CN104716844A (en) | 2015-03-18 | 2015-03-18 | Input-parallel output-parallel modularized direct current converter with soft switch |
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| CN104716844A true CN104716844A (en) | 2015-06-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230268A (en) * | 2016-08-31 | 2016-12-14 | 中天昱品科技有限公司 | A kind of crisscross parallel LLC resonance DC/DC power inverter |
| CN106329940A (en) * | 2016-11-07 | 2017-01-11 | 江南大学 | Double-transformer serial and parallel structure full-bridge LLC (logical link control) resonant converter |
| CN106972752A (en) * | 2017-05-08 | 2017-07-21 | 深圳陆巡科技有限公司 | Can wide scope regulation output DC DC converters |
| CN110535349A (en) * | 2019-09-03 | 2019-12-03 | 南京工程学院 | A kind of tandem type resonant type soft-switch high-voltage DC-DC conversion device based on phase shifting control |
| WO2020134313A1 (en) * | 2018-12-29 | 2020-07-02 | 中兴通讯股份有限公司 | Full-bridge circuit and full-bridge converter |
| CN116979813A (en) * | 2023-09-22 | 2023-10-31 | 武汉海德博创科技有限公司 | IPOS phase-shifting full-bridge circuit and switching converter |
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| CN102064707A (en) * | 2011-01-21 | 2011-05-18 | 浙江大学 | Input parallel and output parallel combination converter under control of common phase-shifting angle |
| CN103078509A (en) * | 2013-01-28 | 2013-05-01 | 上海电力学院 | Soft switching interleaved DC converter with serial input and parallel output |
| CN103856061A (en) * | 2014-02-25 | 2014-06-11 | 北京理工大学 | Full-range soft switching method of input-series output-paralleled phase-shifted full-bridge convertor |
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| JP2004104957A (en) * | 2002-09-12 | 2004-04-02 | Toshiba Corp | Dc voltage generator |
| CN101814827A (en) * | 2010-04-09 | 2010-08-25 | 南京航空航天大学 | Two-stage type DC converter with high voltage input and low-voltage large current output |
| CN102064707A (en) * | 2011-01-21 | 2011-05-18 | 浙江大学 | Input parallel and output parallel combination converter under control of common phase-shifting angle |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230268A (en) * | 2016-08-31 | 2016-12-14 | 中天昱品科技有限公司 | A kind of crisscross parallel LLC resonance DC/DC power inverter |
| CN106329940A (en) * | 2016-11-07 | 2017-01-11 | 江南大学 | Double-transformer serial and parallel structure full-bridge LLC (logical link control) resonant converter |
| CN106972752A (en) * | 2017-05-08 | 2017-07-21 | 深圳陆巡科技有限公司 | Can wide scope regulation output DC DC converters |
| WO2020134313A1 (en) * | 2018-12-29 | 2020-07-02 | 中兴通讯股份有限公司 | Full-bridge circuit and full-bridge converter |
| CN111384858A (en) * | 2018-12-29 | 2020-07-07 | 中兴通讯股份有限公司 | Full-bridge circuit and full-bridge converter |
| EP3905502A4 (en) * | 2018-12-29 | 2022-02-23 | ZTE Corporation | Full-bridge circuit and full-bridge converter |
| CN110535349A (en) * | 2019-09-03 | 2019-12-03 | 南京工程学院 | A kind of tandem type resonant type soft-switch high-voltage DC-DC conversion device based on phase shifting control |
| CN116979813A (en) * | 2023-09-22 | 2023-10-31 | 武汉海德博创科技有限公司 | IPOS phase-shifting full-bridge circuit and switching converter |
| CN116979813B (en) * | 2023-09-22 | 2023-12-12 | 武汉海德博创科技有限公司 | IPOS phase-shifting full-bridge circuit and switching converter |
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