CN205195566U - Double -barrelled clamper of harmless buffering is just swashing keeps apart converter - Google Patents
Double -barrelled clamper of harmless buffering is just swashing keeps apart converter Download PDFInfo
- Publication number
- CN205195566U CN205195566U CN201520399069.6U CN201520399069U CN205195566U CN 205195566 U CN205195566 U CN 205195566U CN 201520399069 U CN201520399069 U CN 201520399069U CN 205195566 U CN205195566 U CN 205195566U
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- diode
- double
- barrelled
- circuit
- clamper
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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
Double -barrelled positive violent change parallel operation has occupied a large amount of shares in well high -power use occasion at present, and still along with power technology's development, power density requires increasingly highly, and traditional double -barrelled just sharp circuit can not meet the demands on efficiency and volume. The purpose of the utility model is to provide an even if for the weak point of overcoming above -mentioned prior art, and provide a double -barrelled clamper of harmless buffering is just swashing keeps apart converter, it increases harmless snubber circuit and realizes the soft switch of switch tube on double -barrelled clamper just swashs the transfer circuit basis, reduce loss and heat dissipation space, raises the efficiency.
Description
Technical field
The utility model relates to a kind of nondestructive buffering two-tube clamper normal shock isolated converter, belongs to DC/DC and isolates soft switch transducer scope.
Background technology
Normal shock switch converters is divided into single tube forward converter and two-transistor forward converter.Wherein two-transistor forward converter carries out magnetic reset (as V1, V2, D1, D2 in Fig. 1) by power switch pipe series diode, do not need extra reset circuit, the voltage stress that Simultaneous Switching pipe bears equals input voltage, is therefore widely used in the occasion of high voltage input.
Existing two-transistor forward converter adopts hard switching mostly, when both having opened or turned off, the rising of power switch On current or decline and terminal voltage decline or rising carry out simultaneously.In middle high-power applications, voltage and current is all comparatively large, and hard switching can cause suitable loss, and efficiency reduces, and also needs to strengthen thermal dissipation size simultaneously.Along with the development of power technology, power density requirements is more and more higher, and under Same Efficieney requires, volume is the smaller the better.So traditional double tube positive exciting circuit can not meet the demands in efficiency and volume.
Summary of the invention
The purpose of this utility model is exactly to overcome above-mentioned the deficiencies in the prior art part, and a kind of nondestructive buffering two-tube clamper normal shock isolated converter is provided, it is made up of double tube positive exciting isolated variable circuit, lossless buffer circuit and current rectifying and wave filtering circuit, the input of double tube positive exciting isolated variable circuit is connected with power supply, lossless buffer circuit is connected with the two ends, former limit of transformer with the input of double tube positive exciting isolated variable circuit, and the transformer secondary output on double tube positive exciting isolated variable road is connected with current rectifying and wave filtering circuit.
In technique scheme, lossless buffer circuit is made up of three diodes, an inductance and two electric capacity, lossless buffer circuit realizes the low-loss transmission of energy and conversion in two-tube switching process by the resonance effect of the one-way conduction characteristic of diode and inductance, electric capacity, reach the object of Sofe Switch, reduce loss and heat-dissipating space, raise the efficiency.
This topological structure has the following advantages:
(1) this topology remain the switch tube voltage stress of double tube positive exciting circuit converter low, there is not bridge arm direct pass, high reliability.
(2) increase circuit few, structure is simple, and frequency is high, and isolating transformer volume is little, all can save more space.
(3) achieve the zero-current switching of switching tube, reduce loss.
Accompanying drawing explanation
Fig. 1 is circuit structure diagram of the present utility model.
Fig. 2 is oscillogram of the present utility model.
Fig. 3 is operating state t of the present utility model
0-t
1moment isoboles.
Fig. 4 is operating state t of the present utility model
1-t
2moment isoboles.
Fig. 5 is operating state t of the present utility model
2-t
3moment isoboles.
Fig. 6 is operating state t of the present utility model
3-t
4moment isoboles.
Fig. 7 is operating state t of the present utility model
4-t
5, t
5-t
6moment isoboles.
Fig. 8 is operating state t of the present utility model
6-t
7moment isoboles.
Fig. 9 is operating state t of the present utility model
7-t
8moment isoboles.
Figure 10 is the waveform of switching tube driving voltage of the present utility model and switching tube drain-source voltage.
Embodiment
Below in conjunction with accompanying drawing, the utility model will be further described.
As shown in Figure 1, the utility model mainly forms: power supply Vin, switching tube V1, electric capacity CS1, switching tube V2, electric capacity CS2, clamp diode D1 and D2, power transformer T1 (L0 is magnetizing inductance) constitute the energy DC/AC conversion portion of power inverter, the secondary of power transformer T1, rectifier diode D6, sustained diode 7, filter inductance L2, output filter capacitor Cout constitute the energy AC/DC conversion portion of power inverter, and diode D3, D4, D5, inductance L 1, electric capacity C1, C2 form lossless buffer circuit.
As shown in Figure 2, oscillogram of the present utility model.
As shown in Figure 3, operating state t
0-t
1moment equivalent circuit diagram, at t
0moment, switching tube V1, V2 conducting, U
cS1=U
cS2=Uin/2, U
c1=U
c2=0, circuit has two loops, one by transformer coupled to secondary biography energy, another resets to C1, C2, L1, and the energy simultaneously stored in CS1, CS2 is resetted by V1, V2.Transformer primary side exciting current I
mmaintenance-I
mconstant, output current is shifted to D6 by D7.
As shown in Figure 4, operating state t
1-t
2moment equivalent circuit diagram, at t
1in the moment, when the upper voltage of C1, C2 reaches Uin/2, inductance L 1 electric current reaches maximum.C1, C2, L1, D4 and Uin loop resonance, the voltage in inductance L 1 changes direction, starts electric discharge, and electric current reduces, and electric capacity C1, C2 continue charging, voltage rise.Exciting current I
mstart linear rising, output current transfers to D6 completely.
As shown in Figure 5, operating state t
2-t
3moment equivalent circuit diagram, at t
2in the moment, C1, C2 voltage reaches Uin, and inductance L 0 powers on to flow down and reduces to 0, and diode D4 turns off naturally, and resonance terminates, and transformer PWM works, exciting current I
mcontinue linear increasing.
As shown in Figure 6, operating state t
3-t
4moment equivalent circuit diagram, at t
3in the moment, V1, V2 turn off, and rectifying tube D6 continues conducting, and C1, C2 voltage equals supply voltage, now exciting current I
mhave two bleed-off circuits, a loop is L0 → CS2 → Uin → CS1 → L0, and another loop is L0 → C1 → D3 → Uin → D5 → C2 → L0, Article 1, charge to CS1, CS2 in loop, in charging process, voltage slowly rises, and serves cushioning effect, C1, C2 electric discharge in Article 2 loop.
As shown in Figure 7, operating state t
4-t
5moment equivalent circuit diagram, t
4moment, U
cS1=U
cS2=Uin/2, primary voltage of transformer is 0, exciting current I
mmaintenance+I
mconstant, charge to CS1, CS2, C1, C2 discharge, the upper stored energy of L0 toward junction capacitance CS1, CS2 and the upper transfer of clamp capacitor C1, C2, and finally turns back in power supply Uin, and transformer-secondary voltage is also 0, rectifier diode D6 ends, and secondary by D7 afterflow, L2 releases energy.
Operating state t
5-t
6moment equivalent circuit diagram also as shown in Figure 7, t
5in the moment, diode D1, D2 conducting, the upper voltage of junction capacitance CS1, CS2 is clamped at Uin, and CS1, CS2 charging is complete, C1, C2 discharge off, U
c1=U
c2=0, exciting current I
mlinear decline, the upper stored energy of L0 continues to shift in power supply Uin, secondaryly continues through D7 afterflow, at t
6moment, exciting current I
mlinearly drop to the upper stored energy of 0, L0 all to have transferred in power supply Uin, accomplish real lossless, magnetic core of transformer resets simultaneously.
As shown in Figure 8, operating state t
6-t
7moment equivalent circuit diagram, t
6moment, magnetizing inductance L0 and junction capacitance CS1, CS2 resonant operational, exciting current I
mnegative sense increases, and the upper voltage of junction capacitance CS1, CS2 is declined by Uin, when its voltage drop is to Uin/2, and exciting current maximum negative value-I
m.
As shown in Figure 9, operating state t
7-t
8moment equivalent circuit diagram, t
7in the moment, junction capacitance CS1, CS2 have the trend continuing electric discharge, and transformer primary voltage just will be, rectifier diode D6 conducting, transformer magnetizing current I
mmaintenance-I
mconstant, CS1, CS2 voltage is clamped at Uin/2, to t
8in the moment, switching tube V1, V2 conducting enters next switch periods.
As shown in Figure 10, be the voltage waveform (2) between the drive waveforms (1) when the switching tube of surveying turns off and drain-source pole, as seen from the figure, switching tube turns off the moment, and between drain-source pole, voltage is in slow rising, achieves Sofe Switch.
Claims (2)
1. nondestructive buffering two-tube clamper normal shock isolated converter, it is characterized in that: nondestructive buffering two-tube clamper normal shock isolated converter is made up of double tube positive exciting isolated variable circuit, lossless buffer circuit and current rectifying and wave filtering circuit, the input of double tube positive exciting isolated variable circuit is connected with power supply, lossless buffer circuit is connected with the two ends, former limit of transformer with the input of double tube positive exciting isolated variable circuit, and the transformer secondary output on double tube positive exciting isolated variable road is connected with current rectifying and wave filtering circuit.
2. nondestructive buffering according to claim 1 two-tube clamper normal shock isolated converter, it is characterized in that: described Lossless Snubber buffer circuit is made up of diode D3, D4, D5, inductance L 1, electric capacity C1, C2, the positive pole of described diode D3 is connected with the positive pole of input power Vin; The negative pole of described diode D3 is connected with the positive pole of diode D4; Described inductance L 1 bipod is connected with the negative pole of diode D5 with the positive pole of diode D4 respectively; The negative pole of described diode D5 is connected with the negative pole of input power Vin; Described electric capacity C1 bipod is connected with the positive pole of diode D1 with the negative pole of diode D4 respectively; Described electric capacity C2 bipod is connected with the negative pole of diode D2 with the negative pole of diode D5 respectively; Lossless buffer circuit realizes the low-loss transmission of energy and conversion in two-tube switching process by the resonance effect of the one-way conduction characteristic of diode and inductance, electric capacity, reaches the object of Sofe Switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520399069.6U CN205195566U (en) | 2015-06-11 | 2015-06-11 | Double -barrelled clamper of harmless buffering is just swashing keeps apart converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520399069.6U CN205195566U (en) | 2015-06-11 | 2015-06-11 | Double -barrelled clamper of harmless buffering is just swashing keeps apart converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195566U true CN205195566U (en) | 2016-04-27 |
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ID=55788510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520399069.6U Active CN205195566U (en) | 2015-06-11 | 2015-06-11 | Double -barrelled clamper of harmless buffering is just swashing keeps apart converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205195566U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110768530A (en) * | 2019-11-13 | 2020-02-07 | 东莞南方半导体科技有限公司 | Multi-path voltage-stabilized power supply circuit and electronic equipment |
-
2015
- 2015-06-11 CN CN201520399069.6U patent/CN205195566U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110768530A (en) * | 2019-11-13 | 2020-02-07 | 东莞南方半导体科技有限公司 | Multi-path voltage-stabilized power supply circuit and electronic equipment |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |