CN204810151U - Take parallelly connected modularization direct -current converter of input parallel outlet of soft switch - Google Patents
Take parallelly connected modularization direct -current converter of input parallel outlet of soft switch Download PDFInfo
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- CN204810151U CN204810151U CN201520153040.XU CN201520153040U CN204810151U CN 204810151 U CN204810151 U CN 204810151U CN 201520153040 U CN201520153040 U CN 201520153040U CN 204810151 U CN204810151 U CN 204810151U
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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 relates to a take parallelly connected modularization direct -current converter of input parallel outlet of soft switch belongs to isolated form direct -current converter technical field. The utility model discloses a structurally comprise 2 isolated form high frequency direct -current converter submodule pieces, the inlet side is parallelly connected structure, and the outlet side is parallelly connected structure. Insert a series connection LC network between the mid point that mid point through moving the leading arm of looks full -bridge converter at first isolated form high frequency direct -current converter submodule piece and second isolated form high frequency direct -current converter submodule piece moved looks full -bridge converter hysteresis arm, second isolated form high frequency direct -current converter submodule piece move the leading bizhong point of looks full -bridge converter and first isolated form high frequency direct -current converter submodule piece move looks full -bridge converter hysteresis bizhong point insert the parallelly connected modularization direct -current converter of another series connection LC network implementation input parallel outlet in the no -voltage of lagging leg during in the underloading open ZVS, further reduce switching loss, the efficiency of the transform is improved.
Description
Technical field
The utility model relates to the application of electric and electronic technical field in electric power system, particularly relates to a kind of input Parallel opertation parallel modular DC converter with Sofe Switch.
Background technology
Along with the development of electric automobile, 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.
Utility model content
The utility model 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 one be applied in have a meeting, an audience, etc. well under one's control greatly close under, there is the input Parallel opertation parallel modular DC converter of Sofe Switch.Its technical scheme is as shown in Figure 1:
A kind of input Parallel opertation parallel modular DC converter with Sofe Switch, it is characterized in that this transformer configuration is in parallel by input side by 2 isolated form high frequency dc to dc converter submodules, outlet side parallel connection is formed, described isolated form high frequency dc to dc converter submodule selects high-frequency isolation type single stage converter topology, its structure comprises the phase-shifted full-bridge converter be made up of 4 metal-oxide-semiconductors, high frequency transformer, bridge rectifier filter circuit and LC series connection soft switch circuit, the former limit of high frequency transformer is the phase-shifted full-bridge converter 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-shifted full-bridge converter, Q5-Q8 is the second phase-shifted full-bridge converter, wherein Q1, Q3, Q5, Q7 forms leading-bridge, Q2, Q4, Q6, Q8 forms lagging leg.High frequency transformer secondary is the bridge rectifier of four diode compositions, rectification circuit is through inductance and capacitor filtering, finally obtain VD, a series LC network is accessed between the mid point of the advanced arm on the first former limit of isolated form high frequency dc to dc converter submodule medium/high frequency transformer and the mid point of the second isolated form high frequency dc to dc converter submodule medium/high frequency transformer former limit lagging leg, series LC network is in series by inductance L r1 and electric capacity Cr1, and position is interchangeable; Another series LC network is accessed at the second isolated form high frequency dc to dc converter submodule medium/high frequency transformer former limit advanced arm mid point and the first isolated form high frequency dc to dc converter submodule medium/high frequency transformer former limit lagging leg mid point, series LC network is in series by inductance L r2 and electric capacity Cr2, position can exchange, two identical LC networks are formed by an inductance and a capacitances in series, be respectively Cr1, Lr1 and Cr2, Lr2, the no-voltage conducting of each switching tube can be realized.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, put forward large 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 utility model, put forward the efficiency of large 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 soft open-minded of each switching tube can be realized.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-shifted full-bridge converter 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 series LC network both end voltage and two LC networks, thus control the output voltage of phase-shifting transformer.Phase shifting angle increases, and output voltage reduces, and in series LC network, current amplitude increases; Otherwise phase shifting angle reduces, output voltage increases, and the current amplitude in series LC network reduces.
When exporting as constant voltage, input voltage rises and causes greatly phase shifting angle to increase, thus the current amplitude in series LC network 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, 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 series LC network electric current 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 series LC network increases, and now Sofe Switch is realized by the electric current of LC network.
Claims (1)
1. the input Parallel opertation parallel modular DC converter with Sofe Switch, it is characterized in that this transformer configuration is in parallel by input side by 2 isolated form high frequency dc to dc converter submodules, outlet side parallel connection is formed, described isolated form high frequency dc to dc converter submodule selects high-frequency isolation type single stage converter topology, its structure comprises the phase-shifted full-bridge converter be made up of 4 metal-oxide-semiconductors, high frequency transformer, bridge rectifier filter circuit and LC series connection soft switch circuit, the former limit of high frequency transformer is the phase-shifted full-bridge converter be made up of four controlled metal-oxide-semiconductors, high frequency transformer secondary is the bridge rectifier of four diode compositions, rectification circuit is through inductance and capacitor filtering, finally obtain VD, a series LC network is accessed between the mid point of the advanced arm on the first former limit of isolated form high frequency dc to dc converter submodule medium/high frequency transformer and the mid point of the second isolated form high frequency dc to dc converter submodule medium/high frequency transformer former limit lagging leg, series LC network is in series by inductance L r1 and electric capacity Cr1, position is interchangeable, another series LC network is accessed at the second isolated form high frequency dc to dc converter submodule medium/high frequency transformer former limit advanced arm mid point and the first isolated form high frequency dc to dc converter submodule medium/high frequency transformer former limit lagging leg mid point, series LC network is in series by inductance L r2 and electric capacity Cr2, and position can exchange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520153040.XU CN204810151U (en) | 2015-03-18 | 2015-03-18 | Take parallelly connected modularization direct -current converter of input parallel outlet of soft switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520153040.XU CN204810151U (en) | 2015-03-18 | 2015-03-18 | Take parallelly connected modularization direct -current converter of input parallel outlet of soft switch |
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| CN204810151U true CN204810151U (en) | 2015-11-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059376A (en) * | 2016-06-03 | 2016-10-26 | 山东航天电子技术研究所 | Power supply system suitable for high repetition frequency impulse load |
| WO2019128071A1 (en) * | 2017-12-29 | 2019-07-04 | 华中科技大学 | Dc-dc 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 |
-
2015
- 2015-03-18 CN CN201520153040.XU patent/CN204810151U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059376A (en) * | 2016-06-03 | 2016-10-26 | 山东航天电子技术研究所 | Power supply system suitable for high repetition frequency impulse load |
| WO2019128071A1 (en) * | 2017-12-29 | 2019-07-04 | 华中科技大学 | Dc-dc converter |
| US10958180B2 (en) | 2017-12-29 | 2021-03-23 | Huazhong University Of Science And Technology | DC-DC converter for wide input voltage |
| 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 |
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