CN206041815U - Two positive violent change parallel operations of integrated integration series connection parallel combination formula - Google Patents
Two positive violent change parallel operations of integrated integration series connection parallel combination formula Download PDFInfo
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- CN206041815U CN206041815U CN201621084522.5U CN201621084522U CN206041815U CN 206041815 U CN206041815 U CN 206041815U CN 201621084522 U CN201621084522 U CN 201621084522U CN 206041815 U CN206041815 U CN 206041815U
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Abstract
The utility model discloses a two positive violent change parallel operations of integrated integration series connection parallel combination formula, including switch tube Q1, Q2, Q3, Q4, transformer T1, T2, PWM control circuit, input filter electric capacity C1, output filter capacitance C2, rectifier diode D1 and D3, freewheeling diode D2 and D4, energy storage inductance L1 and L2, feedback and overvoltage crowbar, current foldback circuit, the utility model discloses a control switch pipe Q1, Q2 and Q3, Q4 open and close in turn, are control energy storage inductance L1 and L2 DC800 in turn to load release of energy with input voltage is the DC1000V transform DC12V for output voltage DC28V satisfies the demand of some important events and this type of converter of special field, has the characteristics of reliability height, redundant parallelly connected and input extra high voltage scope.
Description
Technical field
This utility model is related to circuit converter technical field, more specifically a kind of integrated series and parallel group
Box-like pair of forward converter.
Background technology
At present, the isolated DC/DC changers input voltage substantial scope of standard have DC9V～DC18V, DC18V～DC36V,
DC36V～DC72V, DC66V～DC160V and five kinds of DC200V～DC400V, LAMBDA is public for external U.S. VICOR companies, Japan
Department and the professional production business that U.S. SynQor is the products such as the isolated DC/DC changers of standard, its manufacture and designing technique level
All the time industry-leading status is in, the |input paramete of main development and production product is also only above-mentioned five kinds, but is input into extra-high pressure
In DC800V～DC1000V fields, famous foreign manufacturer does not have a product design, and in some important events of China and special
In field, this input voltage range parametric converter is needed to design.
Utility model content
This utility model is for avoiding the weak point existing for above-mentioned prior art, there is provided a kind of integrated series connection
The double forward converters of parallel combination type.
This utility model solves the technical scheme that adopted of technical problem：
A kind of double forward converters of integrated series and parallel combination type, including switching tube Q1, Q2, Q3, Q4, transformator
T1, T2, pwm control circuit, input filter capacitor C1, output filter capacitor C2, commutation diode D1 and D3, sustained diode 2
With D4, energy storage inductor L1 and L2, feedback and overvoltage crowbar, current foldback circuit, it is characterised in that：The filter capacitor C1
It is connected with DC source, switching tube Q1 and switching tube Q2 is connected in transformator T1 loop of power circuit, switching tube Q3 and switching tube
Q4 is connected in transformator T2 loop of power circuit, and the drain electrode of switching tube Q1 and the drain electrode of switching tube Q3 are defeated with input filter capacitor C1
Go out anode to be connected, the Same Name of Ends of the primary coil of transformator T1 is connected with the source electrode of switching tube Q1, the primary coil of transformator T1
Different name end be connected with the drain electrode of switching tube Q2, the Same Name of Ends of the primary coil of transformator T2 and the source electrode phase of switching tube Q3
Even, the different name end of the primary coil of transformator T2 is connected with the drain electrode of switching tube Q4, the source electrode and input filter of switching tube Q2, Q4
The output negative terminal of electric capacity C1 is connected, switching tube Q1, Q2 and Q3, grid two control end phases respectively with pwm control circuit of Q4
Even, the Same Name of Ends of the secondary coil of transformator T1, T2 connects commutation diode D1 and D3 respectively, the secondary coil of transformator T1
Different name end is connected with energy storage inductor L1, sustained diode 2 respectively, and the other end of sustained diode 2 is with filter capacitor C2's
Output plus terminal is connected, and the different name end of the secondary coil of transformator T2 is connected with energy storage inductor L2, sustained diode 4 respectively,
The other end of sustained diode 4 is connected with the output plus terminal of filter capacitor C2, and output filter capacitor C2 is connected to two outputs
Between end, the output negative terminal of output filter capacitor C2 is negative with energy storage inductor L1, energy storage inductor L2, feedback and overvoltage crowbar
Phase input, the negative-phase input of current foldback circuit are connected, the output plus terminal of output filter capacitor C2 respectively with feedback and
The normal phase input end of overvoltage crowbar, the normal phase input end of current foldback circuit are connected, feedback and overvoltage crowbar and
The outfan of current foldback circuit is connected with pwm control circuit feedback input end by opto-coupler chip Q5 and Q6 respectively.
Preferably, integrated circuit and its periphery power supply and driving element of the pwm control circuit by main control chip TL494
Composition.
Preferably, the power module input voltage covers DC800-DC1000V, and output voltage covers DC12V-DC28V.
Operation principle of the present utility model is：
When switching tube Q1, Q2 and Q3, Q4 alternatings are opened, transformator T1, T2 energy respectively through commutation diode D1 and
D3 is alternately to energy storage inductor L1 and L2 energy storage, while alternating releases energy to load, electric capacity C2 plays a part of output filtering；When
When switching tube Q1, Q2 and Q3, Q4 are alternately closed, energy storage inductor L1 and L2 is respectively through sustained diode 2 and D4 alternately to load
Release energy, electric capacity C2 plays a part of output filtering.The effect of switching tube partial pressure is realized in switching tube series connection, by each switching tube
The average voltage partial pressure born, when realizing that it is DC800V～DC1000V to be input into extra-high pressure, switching tube is not subject to pressure restriction,
Can be input into and export two sets of loop of power circuit parallel connections and play a part of power expansion and redundancy with normal work.
Main control chip TL494 normal works, drive A and drive B staggeredly open-minded, when driving A logical, drive B to close；Drive B
When logical, A is driven to close, as the Dead Time of main control chip is by outside dead band resistance adjustable settings, so there are no two groups of drivings
Situation about opening simultaneously.
According to the principle that two groups of drivings of main control chip TL494 are staggeredly opened, when drive A open simultaneously driving switch pipe Q1 with
Q2, the conducting of power input loop of power circuit, according to forward converter principle, transformator T1 own primaries and secondary turns than coupled characteristic,
Transformator T1 plays electrical isolation and energy transmission effect, and now T1 level Same Name of Ends of transformator passes through commutation diode D1 to storage
Can inductance L1 and load transmission energy；When driving, A is not open-minded, and when switching tube Q1 and Q2 do not work, energy storage inductor L1 is through afterflow
Energy is released to load by diode D2.
When driving B is opened while driving switch pipe Q3 and Q4, the conducting of power input loop of power circuit, according to forward converter original
, than coupled characteristic, transformator T2 plays electrical isolation and energy transmission effect, now for reason, transformator T2 own primaries and secondary turns
T2 level Same Name of Ends of transformator is by commutation diode D3 to energy storage inductor L2 and load transmission energy；When driving, B is not open-minded, opens
When pass pipe Q3 and Q4 do not work, energy is released to load through sustained diode 4 by T2 level energy storage inductor L2 of transformator.
In this utility model, two groups of loop of power circuit are input into and are output as parallel relationship, and two groups of drivings of main control chip TL494 are handed over
Stagger logical, so during transformator T1 loop works, changer T1 transmission energy, energy storage inductor L2 release energy, in the same manner transformator
During T2 loop works, changer T2 transmission energy, secondary energy storage inductor L1 release energy, and realize two independently transformators and two
Alternately storage energy and transmission export energy to individual energy storage inductor, reach the function of power expansion.
As changer input is for extra-high pressure DC800V～DC1000V, single switching tube Q1 is difficult to bear so high
It is pressure, so the switching tube using two same models and parameter is connected, realize that switching tube bears pressure average partial pressure, it is so single
Switching tube bears a simply original pressure half voltage, it is possible to achieve input extra-high pressure design.
This utility model solves tradition foreign countries with the not similar conversion of domestic changer supertension input DC800-DC1000V
The typical products of device design, DC/DC inverter powers circuit form double forward converters using two groups of forward converter parallel combinations, often
Using two switching tube series connection in group forward converter, the double forward converters of integrated series and parallel combination type are realized, meets defeated
Enter the requirement that extra-high pressure and redundant parallel expand power.
Compared with prior art, the beneficial effects of the utility model are：
1st, this utility model adopts the double forward converters of integrated series and parallel combination type, with higher reliability,
Input voltage covers DC800-DC1000V, and output voltage covers DC12V-DC24V（Single channel）, its volume is 116.8 × 61 × 13
（Unit：Mm, the full brick of standard）, peak power output is 500W, and peak efficiency is 91%, and power density reaches as high as 89.9W/
in3, external manufacturer can meet some important events and special dimension this quasi-converter temporarily without similar changer product
Demand.
2nd, changer is isolation method, and isolation voltage is not less than DC1000V；
The beneficial effects of the utility model are that DC/DC inverter powers circuit is formed using two groups of forward converter parallel combinations
Double forward converters, using two switching tube series connection in every group of forward converter, realize that integrated series and parallel combination type is double just
Excitation circuit, meets the requirement that input extra-high pressure and redundant parallel expand power, and external manufacturer is temporarily without similar changer
Product, can meet the demand of some important events and special dimension this quasi-converter.
Description of the drawings
Fig. 1 is a kind of double forward converter structural representations of integrated series and parallel combination type of this utility model.
Specific embodiment
Referring to Fig. 1, a kind of double forward converter of integrated series and parallel combination type, including switching tube Q1, Q2, Q3,
It is Q4, transformator T1, T2, pwm control circuit, input filter capacitor C1, output filter capacitor C2, commutation diode D1 and D3, continuous
Stream diode D2 and D4, energy storage inductor L1 and L2, feedback and overvoltage crowbar, current foldback circuit, it is characterised in that：It is described
Filter capacitor C1 is connected with DC source, and switching tube Q1 and switching tube Q2 is connected in transformator T1 loop of power circuit, switching tube
Q3 and switching tube Q4 are connected in transformator T2 loop of power circuit, drain electrode and the input filter of the drain electrode of switching tube Q1 and switching tube Q3
The output plus terminal of electric capacity C1 is connected, and the Same Name of Ends of the primary coil of transformator T1 is connected with the source electrode of switching tube Q1, transformator T1
The different name end of primary coil be connected with the drain electrode of switching tube Q2, Same Name of Ends and the switching tube Q3 of the primary coil of transformator T2
Source electrode be connected, the different name end of the primary coil of transformator T2 is connected with the drain electrode of switching tube Q4, the source electrode of switching tube Q2, Q4 and
The output negative terminal of input filter capacitor C1 is connected, switching tube Q1, Q2 and Q3, grid respectively with pwm control circuit two of Q4
Control end is connected, and the Same Name of Ends of the secondary coil of transformator T1, T2 connects commutation diode D1 and D3 respectively, and transformator T1's is secondary
The different name end of level coil is connected with energy storage inductor L1, sustained diode 2 respectively, the other end of sustained diode 2 and filtering
The output plus terminal of electric capacity C2 is connected, the different name end of the secondary coil of transformator T2 respectively with energy storage inductor L2, fly-wheel diode
D4 is connected, and the other end of sustained diode 4 is connected with the output plus terminal of filter capacitor C2, output filter capacitor C2 connections
Between the two outputs, the output negative terminal of output filter capacitor C2 is protected with energy storage inductor L1, energy storage inductor L2, feedback and overvoltage
The negative-phase input of protection circuit, the negative-phase input of current foldback circuit are connected, the output plus terminal point of output filter capacitor C2
It is not connected with feedback and the normal phase input end of overvoltage crowbar, the normal phase input end of current foldback circuit, feeds back and overvoltage
The outfan of protection circuit and current foldback circuit passes through opto-coupler chip Q5 and Q6 and pwm control circuit feedback input end phase respectively
Even.
The pwm control circuit by main control chip TL494 integrated circuit and its periphery power supply and driving element constitute.
The DC supply input voltage covers DC800-DC1000V, and outfan output voltage covers DC12V-DC28V.
The double forward converters of a kind of integrated series and parallel combination type that this utility model is provided pass through following side
Formula works：
Main control chip TL494 normal works, drive A and drive B staggeredly open-minded, when driving A logical, drive B to close；Drive B
When logical, A is driven to close, as the Dead Time of main control chip is by outside dead band resistance adjustable settings, so there are no two groups of drivings
Situation about opening simultaneously.
According to the principle that two groups of drivings of main control chip TL494 are staggeredly opened, when drive A open simultaneously driving switch pipe Q1 with
Q2, the conducting of power input loop of power circuit, according to forward converter principle, transformator T1 own primaries and secondary turns than coupled characteristic,
Transformator T1 plays electrical isolation and energy transmission effect, and now T1 level Same Name of Ends of transformator passes through commutation diode D1 to storage
Can inductance L1 and load transmission energy；When driving, A is not open-minded, and when switching tube Q1 and Q2 do not work, energy storage inductor L1 is through afterflow
Energy is released to load by diode D2.
When driving B is opened while driving switch pipe Q3 and Q4, the conducting of power input loop of power circuit, according to forward converter original
, than coupled characteristic, transformator T2 plays electrical isolation and energy transmission effect, now for reason, transformator T2 own primaries and secondary turns
T2 level Same Name of Ends of transformator is by commutation diode D3 to energy storage inductor L2 and load transmission energy；When driving, B is not open-minded, opens
When pass pipe Q3 and Q4 do not work, energy is released to load through sustained diode 4 by T2 level energy storage inductor L2 of transformator.
It is DC12V-DC28V that most input voltage is transformed to output voltage for DC800-DC1000V at last, meets some important
The demand of occasion and special dimension this quasi-converter.
Technical solutions of the utility model are exemplarily described to this utility model above in conjunction with accompanying drawing, it is clear that this reality
It is not subject to the restrictions described above with new implementing, as long as employ method design of the present utility model entering with technical scheme
Capable various unsubstantialities are improved, or not improved the design of utility model and technical scheme are directly applied to other occasions
, within protection domain of the present utility model.
Claims (3)
1. the double forward converter of a kind of integrated series and parallel combination type, including switching tube Q1, Q2, Q3, Q4, transformator
T1, T2, pwm control circuit, input filter capacitor C1, output filter capacitor C2, commutation diode D1 and D3, sustained diode 2
With D4, energy storage inductor L1 and L2, feedback and overvoltage crowbar, current foldback circuit, it is characterised in that：The filter capacitor C1
It is connected with DC source, switching tube Q1 and switching tube Q2 is connected in transformator T1 loop of power circuit, switching tube Q3 and switching tube
Q4 is connected in transformator T2 loop of power circuit, and the drain electrode of switching tube Q1 and the drain electrode of switching tube Q3 are defeated with input filter capacitor C1
Go out anode to be connected, the Same Name of Ends of the primary coil of transformator T1 is connected with the source electrode of switching tube Q1, the primary coil of transformator T1
Different name end be connected with the drain electrode of switching tube Q2, the Same Name of Ends of the primary coil of transformator T2 is connected with the source electrode of switching tube Q3,
The different name end of the primary coil of transformator T2 is connected with the drain electrode of switching tube Q4, and the source electrode of switching tube Q2, Q4 and input filter are electric
The output negative terminal for holding C1 is connected, and switching tube Q1, Q2 and Q3, the grid of Q4 are connected with two control ends of pwm control circuit respectively,
The Same Name of Ends of the secondary coil of transformator T1, T2 connects commutation diode D1 and D3 respectively, the secondary coil of transformator T1 it is different
Name end is connected with energy storage inductor L1, sustained diode 2 respectively, and the other end of sustained diode 2 is defeated with filter capacitor C2
Go out anode to be connected, the different name end of the secondary coil of transformator T2 is connected with energy storage inductor L2, sustained diode 4 respectively, continue
The other end of stream diode D4 is connected with the output plus terminal of filter capacitor C2, and output filter capacitor C2 is connected to two outfans
Between, the output negative terminal and the negative of energy storage inductor L1, energy storage inductor L2, feedback and overvoltage crowbar of output filter capacitor C2
Input, the negative-phase input of current foldback circuit are connected, the output plus terminal of output filter capacitor C2 respectively with feedback and mistake
The normal phase input end of voltage protection circuit, the normal phase input end of current foldback circuit are connected, and feed back and overvoltage crowbar and mistake
The outfan of stream protection circuit is connected with pwm control circuit feedback input end by opto-coupler chip Q5 and Q6 respectively.
2. the double forward converter of a kind of integrated series and parallel combination type according to claim 1, it is characterised in that：
The pwm control circuit by main control chip TL494 integrated circuit and its periphery power supply and driving element constitute.
3. the double forward converter of a kind of integrated series and parallel combination type according to claim 1, it is characterised in that：
The DC supply input voltage covers DC800-DC1000V, and outfan output voltage covers DC12V-DC28V.
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| CN201621084522.5U CN206041815U (en) | 2016-09-27 | 2016-09-27 | Two positive violent change parallel operations of integrated integration series connection parallel combination formula |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2016
- 2016-09-27 CN CN201621084522.5U patent/CN206041815U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| GR01 | Patent grant |