CN104836447A - Large power parallel double-switch forward DC/DC power supply module - Google Patents
Large power parallel double-switch forward DC/DC power supply module Download PDFInfo
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- CN104836447A CN104836447A CN201510309698.XA CN201510309698A CN104836447A CN 104836447 A CN104836447 A CN 104836447A CN 201510309698 A CN201510309698 A CN 201510309698A CN 104836447 A CN104836447 A CN 104836447A
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Abstract
The invention discloses a large power parallel double-switch forward DC/DC power supply module comprising switch tubes Q1, Q2, transformers T1, T2, a PWM control circuit, an input filter capacitor C1, an output filter capacitor C2, a rectifier circuit, a feedback and overvoltage protection circuit, and an overcurrent protection circuit; the power supply module employs an integrated design; a DC/DC converter power circuit employs an interlace parallel double-switch forward circuit topology form; the circuit portion designs two single-end switch forward circuit topology forms to be integrated and paralleled so as to realize power expansion, thus solving the problems that a domestic same-size product uses two power conversion magnetic cores, and an output power cannot reach a foreign same-kind product, so four power conversion magnetic cores can satisfy DC/DC power supply module power conversion requirements; the large power parallel double-switch forward DC/DC power supply module is small in size, high in efficiency and reliability, good in heat radiation performance, and wide in application scope.
Description
Technical field
The present invention relates to a kind of power module, specifically, relate to the two normal shock DC/DC power module of a kind of high-power parallel connection.
Background technology
At present, the isolated DC/DC power module of standard is mainly divided into 1/8 brick, quarter brick, 1/2 brick and full brick four kinds, and wherein full brick is the maximum isolated DC/DC power module of monomer power output.VICOR company of the U.S., Japanese LAMBDA company and U.S. SynQor are the professional production business of the products such as the isolated DC/DC power module of standard, it manufactures and designing technique level is in industry-leading status all the time, is widely used in communication, industry control, Medical Devices and military industry field with advantages such as high reliability, high power density, wide operating ambient temperature ranges.
In recent years, the U.S. and Japan have carried out " embargo " policy to these products for Sensitive Domain, and a sudden change in the situation for current international-style, the impossible dependence on import completely of high-end military DC/DC power module of China, outside independent development subrogate country, DC/DC power module is extremely urgent already, wherein with prominent full brick for research and development difficult technology is maximum, a kind of product that the R&D cycle is the longest.
The research and development difficult point of domestic standard isolated DC/DC large power, electrically source module is subject to power transfer transformer, the restriction of power transfer inductance magnetic material and volume, transformer and the inductance of full brick size monomer power transfer are difficult to the power transfer realizing 600W, the full brick power of the standard finished products developed is 400W-500W to the maximum, most effectively be no more than 88%, and same kind of products at abroad is all 600W-700W, most effectively reach 90% ~ 91%, and the full brick product circuit topology of domestic research and development is mainly with single ended forward circuit, normal shock active clamp circuit and Forward-flyback active clamp circuit topology are main, the product that this several circuit topology is developed also is subject to domestic power transfer transformer, the restriction of power transfer inductance magnetic material and volume, power output and conversion efficiency never have same kind of products at abroad good performance indexes.
Be described for typical traditional single ended forward circuit, single ended forward circuit topology mode is applicable to the power module of power 50W ~ 600W, and Fig. 2 is shown in by concrete sketch.
This circuit topology mode is formed primarily of a power transfer transformer and a filtering energy storage inductor; Normal shock active clamp and Forward-flyback active clamp electric source topology also carry out extension exploitation based on forward converter topology, also be made up of a power transfer transformer and a filtering energy storage inductor, its product developed is subject to the restriction of domestic power transfer transformer, power transfer inductance magnetic material and volume, and the power that cannot realize external similar standardized product is replaced.
Summary of the invention
The two normal shock DC/DC power module of the high-power parallel connection of the one that the present invention designs to solve the problems of the technologies described above just.
The technical solution adopted for the present invention to solve the technical problems is:
The two normal shock DC/DC power module of a kind of high-power parallel connection, comprises switching tube Q1, Q2, transformer T1, T2, pwm control circuit, input filter capacitor C1, output filter capacitor C2, rectification circuit, feedback and overvoltage crowbar and current foldback circuit.DC power supply is connected with input filter capacitor C1, transformer T1, the Same Name of Ends parallel connection of the primary coil of T2 is connected with the output plus terminal of input filter circuit, the different name end of the primary coil of transformer T1 is connected with the source electrode of switching tube Q1, the different name end of the primary coil of transformer T2 is connected with the source electrode of switching tube Q2, switching tube Q1, the drain electrode of Q2 is connected with the output negative terminal of input filter capacitor C1, switching tube Q1, the grid of Q2 is connected with two control ends of pwm control circuit respectively, transformer T1, the secondary Same Name of Ends of T2 connects rectifier diode D1 and D3 respectively to energy storage inductor L1 and L2 storage power, as switching tube Q1 and Q2 alternation, secondary energy storage inductor L1 and L2 is through alternately releasing energy to load respectively through sustained diode 2 and D4, electric capacity C2 plays the effect of output filtering, the effect that power expansion is played in loop of power circuit parallel connection is overlapped in power module input and output two, feedback and overvoltage crowbar are connected with pwm control circuit feedback input end respectively by opto-coupler chip Q3 with Q4 with the output of current foldback circuit.
The two normal shock DC/DC power module of described high-power parallel connection, its pwm control circuit is powered by main control chip UCC28220 integrated circuit and periphery thereof and driving element forms.
The two normal shock DC/DC power module of described high-power parallel connection, its power module input voltage covers DC9-DC80V, and output voltage covers DC12V-DC36V, and input and output two are overlapped the integrated Parallel Design of loop of power circuit and realized power expansion.
The two normal shock DC/DC power module of described high-power parallel connection, its power module shell adopts the standard profile structure of full brick.
The present invention solves the restriction of traditional domestic power transfer transformer, power transfer energy storage inductor magnetic material and volume, adopt two integrated Parallel Designs of single ended forward circuit topology mode, realize power expansion, its power transfer transformer and power transfer energy storage inductor are respectively two, totally four conversion magnetic cores.
Main control chip UCC28220 normally works, and drives 1 to interlock open-minded with driving 2, when driving 1 is opened, drives 2 to close; When driving 2 to open, drive 1 to close, because main control chip has dead band time setting, there is not driving 1 simultaneously open-minded with driving 2.
The staggered principle opened is driven according to control chip two groups, when driving switch pipe Q1 is opened in driving 1, the loop conducting of power module input power, coupled characteristic is compared by transformer T1 own primary and secondary turns, elementary input energy is delivered to secondary output simultaneously, secondary output provides energy to output loading and to secondary energy storage inductor L1 storage power, when switching tube Q1 does not work, secondary energy storage inductor L1 releases energy through sustained diode 2 pairs of loads through rectifier diode D1.
When driving switch pipe Q2 is opened in driving 2, the loop conducting of power module input power, coupled characteristic is compared by transformer T2 own primary and secondary turns, elementary input energy is delivered to secondary output simultaneously, secondary output provides energy to output loading and to secondary energy storage inductor L1 storage power through rectifier diode D3, when switching tube Q2 does not work, secondary energy storage inductor L2 releases energy through sustained diode 4 pairs of loads.
The present invention adopts crisscross parallel forward converter topology, by partly integrated for the loop of power circuit of two power modules integrated Parallel Design, Fig. 3 is shown in by its circuit theory sketch, two groups by main control chip drive the staggered switching tube controlled in input circuit in parallel of opening to interlock open-minded, two transformers in parallel alternately transmit and export energy, energy storage inductor replaces storage power and alternately releases energy, solve power transfer magnetic core in single circuit topology and can not change the shortcoming of relatively high power, 600W power transfer under the full brick volume of the standard that realizes, and it is few to inherit forward converter topology components and parts, cost is low, high reliability.The two normal shock DC/DC power module overcurrent of a kind of high-power parallel connection and short-circuit protection function have two kinds: a kind of for input inspection stream signal is by the current signal of two the inspection convertor transformer Gather and input ends in loop of input anode, current signal changes AC signal into square-wave signal through rectifier diode, magnitude of voltage is gathered to the inspection stream functional pin certain voltage signal value of control chip by sampling resistor, realize overcurrent and the short-circuit protection function of power module, another kind of inspection for connecting two secondaryly flows sampled signal resistance, inspection stream signal amplified by amplifier and relatively after, control chip CTRL holds, realize output overcurrent and short circuit crossing current function and protecting.
Of the present inventionly to be characterized in:
1, DC/DC power module power circuit adopts crisscross parallel forward converter form, there is higher reliability, input voltage covers DC9-DC80V, output voltage covers DC12V-DC36V(single channel), its volume is 116.8 × 61 × 12.7(unit: mm, the full brick of standard), peak power output is 600W, peak efficiency is 90.2%, and power density reaches as high as 108.7W/in
3, substantially identical with same kind of products at abroad performance index, can realize domestic, and Pin-to-Pin replace.
2, power module is isolation method, and isolation voltage is not less than DC500V;
The invention has the beneficial effects as follows that power module power circuit portion is by two integrated Parallel Designs of single ended forward circuit topology mode, realize power expansion, solve domestic same volume product cannot reach same kind of products at abroad difficulty because of two power transfer magnetic core power outputs, realize the requirement that four power transfer magnetic cores meet its DC/DC power module power transfer, substantially identical with same kind of products at abroad performance index, can realize domestic, and Pin-to-Pin replace.
Accompanying drawing explanation
Fig. 1 is the inner theory diagram of power module of the present invention.
Fig. 2 is traditional single ended forward circuit theory diagram.
It is power module pwm control circuit sketch of the present invention in Fig. 3 dotted line frame.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1; the two normal shock DC/DC power module of a kind of high-power parallel connection, comprises switching tube Q1, Q2, transformer T1, T2, pwm control circuit, input filter capacitor C1, output filter capacitor C2, rectification circuit, feedback and overvoltage crowbar and current foldback circuit.DC power supply is connected with input filter capacitor C1, transformer T1, the Same Name of Ends parallel connection of the primary coil of T2 is connected with the output plus terminal of input filter circuit, the different name end of the primary coil of transformer T1 is connected with the source electrode of switching tube Q1, the different name end of the primary coil of transformer T2 is connected with the source electrode of switching tube Q2, switching tube Q1, the drain electrode of Q2 is connected with the output negative terminal of input filter capacitor C1, switching tube Q1, the grid of Q2 is connected with two control ends of pwm control circuit respectively, transformer T1, the secondary Same Name of Ends of T2 connects rectifier diode D1 and D3 respectively to energy storage inductor L1 and L2 storage power, as switching tube Q1 and Q2 alternation, secondary energy storage inductor L1 and L2 is through alternately releasing energy to load respectively through sustained diode 2 and D4, electric capacity C2 plays the effect of output filtering, the effect that power expansion is played in loop of power circuit parallel connection is overlapped in power module input and output two, feedback and overvoltage crowbar are connected with pwm control circuit feedback input end respectively by opto-coupler chip Q3 with Q4 with the output of current foldback circuit.
The two normal shock DC/DC power module of described high-power parallel connection, its pwm control circuit is powered by main control chip UCC28220 integrated circuit and periphery thereof and driving element forms.Be power module pwm control circuit sketch of the present invention as shown in Figure 3 in dotted line frame.
The two normal shock DC/DC power module of described high-power parallel connection, its power module input voltage covers DC9-DC80V, and output voltage covers DC12V-DC36V, and input and output two are overlapped the integrated Parallel Design of loop of power circuit and realized power expansion.
The two normal shock DC/DC power module of described high-power parallel connection, its power module shell adopts the standard profile structure of full brick.
Power module adopts the power transfer transformer of two same model and magnetic material and power transfer inductance as redundant parallel transformer and secondary energy storage inductor, its basic parameter is all identical, the power tube model that input is in parallel with output, parameter and quantity are all selected consistent, two groups by main control chip drive alternately control input end switching tube, the Dead Time of main control chip is controlled by dead band resistance, by regulating dead zone function resistance adjustment Dead Time, so do not have two groups to drive situation about opening simultaneously, realize two transformer friendship transmission output energy independently, secondary energy storage filter inductance storage power transferring energy, actually achieve the effect that two transformers play a transformer, two energy storage inductors play an energy storage inductor effect, solve domestic same volume product cannot reach same kind of products at abroad difficulty because of two power transfer magnetic core power outputs, realize the requirement that four power transfer magnetic cores meet its DC/DC power module power transfer, substantially identical with same kind of products at abroad performance index, can realize domestic, and Pin-to-Pin replaces.
The present invention is not limited to above-mentioned preferred forms, anyone other any or akin products identical with the present invention drawn under enlightenment of the present invention, all drops within protection scope of the present invention.
Claims (4)
1. the two normal shock DC/DC power module of high-power parallel connection, comprises switching tube Q1, Q2, transformer T1, T2, pwm control circuit, input filter capacitor C1, output filter capacitor C2, rectification circuit, feedback and overvoltage crowbar and current foldback circuit, it is characterized in that: DC power supply is connected with input filter capacitor C1, transformer T1, the Same Name of Ends parallel connection of the primary coil of T2 is connected with the output plus terminal of input filter circuit, the different name end of the primary coil of transformer T1 is connected with the source electrode of switching tube Q1, the different name end of the primary coil of transformer T2 is connected with the source electrode of switching tube Q2, switching tube Q1, the drain electrode of Q2 is connected with the output negative terminal of input filter capacitor C1, switching tube Q1, the grid of Q2 is connected with two control ends of pwm control circuit respectively, transformer T1, the secondary Same Name of Ends of T2 connects rectifier diode D1 and D3 respectively to energy storage inductor L1 and L2 storage power, as switching tube Q1 and Q2 alternation, secondary energy storage inductor L1 and L2 is through alternately releasing energy to load respectively through sustained diode 2 and D4, electric capacity C2 plays the effect of output filtering, the effect that power expansion is played in loop of power circuit parallel connection is overlapped in power module input and output two, feedback and overvoltage crowbar are connected with pwm control circuit feedback input end respectively by opto-coupler chip Q3 with Q4 with the output of current foldback circuit.
2. the two normal shock DC/DC power module of high-power parallel connection according to claim 1, is characterized in that: pwm control circuit is powered by main control chip UCC28220 integrated circuit and periphery thereof and driving element forms.
3. the two normal shock DC/DC power module of high-power parallel connection according to claim 1, it is characterized in that: power module input voltage covers DC9-DC80V, output voltage covers DC12V-DC36V, and input and output two are overlapped the integrated Parallel Design of loop of power circuit and realized power expansion.
4. the two normal shock DC/DC power module of high-power parallel connection according to claim 1, is characterized in that: power module shell adopts the standard profile structure of full brick.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099209A (en) * | 2015-09-17 | 2015-11-25 | 航天长峰朝阳电源有限公司 | Integrated serial-connection and parallel-connection combined type double-flyback circuit convertor |
| CN106208721A (en) * | 2016-09-27 | 2016-12-07 | 航天长峰朝阳电源有限公司 | The double forward converter of a kind of integrated series and parallel combination type |
| CN109194144A (en) * | 2018-08-10 | 2019-01-11 | 合肥华耀电子工业有限公司 | A kind of double positive activation type booster circuits of crisscross parallel |
| CN109964397A (en) * | 2016-11-01 | 2019-07-02 | 三菱电机株式会社 | Power conversion device |
| CN114039406A (en) * | 2021-10-20 | 2022-02-11 | 广东电网有限责任公司广州供电局 | Power supply circuit and flexible direct-current power transmission system |
| CN114123788A (en) * | 2021-11-12 | 2022-03-01 | 许继集团有限公司 | Flexible direct-current transmission converter valve submodule redundancy energy-taking device and control method thereof |
| CN114301295A (en) * | 2020-10-07 | 2022-04-08 | 浙江杭可仪器有限公司 | Direct-current integrated power supply and design method thereof |
| CN116404862A (en) * | 2023-06-08 | 2023-07-07 | 广东东菱电源科技有限公司 | Interleaved forward topology overcurrent protection circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099209A (en) * | 2015-09-17 | 2015-11-25 | 航天长峰朝阳电源有限公司 | Integrated serial-connection and parallel-connection combined type double-flyback circuit convertor |
| CN106208721A (en) * | 2016-09-27 | 2016-12-07 | 航天长峰朝阳电源有限公司 | The double forward converter of a kind of integrated series and parallel combination type |
| CN109964397A (en) * | 2016-11-01 | 2019-07-02 | 三菱电机株式会社 | Power conversion device |
| CN109194144A (en) * | 2018-08-10 | 2019-01-11 | 合肥华耀电子工业有限公司 | A kind of double positive activation type booster circuits of crisscross parallel |
| CN114301295A (en) * | 2020-10-07 | 2022-04-08 | 浙江杭可仪器有限公司 | Direct-current integrated power supply and design method thereof |
| CN114039406A (en) * | 2021-10-20 | 2022-02-11 | 广东电网有限责任公司广州供电局 | Power supply circuit and flexible direct-current power transmission system |
| CN114039406B (en) * | 2021-10-20 | 2023-08-08 | 广东电网有限责任公司广州供电局 | Power supply circuit and flexible direct current transmission system |
| CN114123788A (en) * | 2021-11-12 | 2022-03-01 | 许继集团有限公司 | Flexible direct-current transmission converter valve submodule redundancy energy-taking device and control method thereof |
| CN116404862A (en) * | 2023-06-08 | 2023-07-07 | 广东东菱电源科技有限公司 | Interleaved forward topology overcurrent protection circuit |
| CN116404862B (en) * | 2023-06-08 | 2023-08-25 | 广东东菱电源科技有限公司 | Staggered forward topology overcurrent protection circuit |
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Application publication date: 20150812 |