CN100364219C - Main circuit of interleaving inverse excitation type converter with clamping capacitance - Google Patents
Main circuit of interleaving inverse excitation type converter with clamping capacitance Download PDFInfo
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- CN100364219C CN100364219C CNB2005100412017A CN200510041201A CN100364219C CN 100364219 C CN100364219 C CN 100364219C CN B2005100412017 A CNB2005100412017 A CN B2005100412017A CN 200510041201 A CN200510041201 A CN 200510041201A CN 100364219 C CN100364219 C CN 100364219C
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- transformer
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Abstract
The present invention relates to a main circuit of a stagger flyback converter with a clamping capacitor, which belongs to DC/DC converters. The main circuit comprises two stagger parallel circuits of a flyback converter, two output parallel circuits and a clamping capacitor (Cp), wherein a first parallel circuit is composed of an input power source (U<I>), a primary winding of a first transformer (T1) and a first main power tube (Q1); a second parallel circuit is composed of the input power source (U<I>), a primary winding of a second transformer (T2) and a second main power tube (Q2); the output parallel circuits are composed of secondary windings of the two transformers (T1) and (T2), two rectifying diodes (D1) and (D2) and an output filtering capacitor (Co); the clamping capacitor (Cp) is connected between the non-isonym end of the primary winding of the transformer (T1) in a first return circuit and the isonym end of the primary winding of the transformer (T2) in a second return circuit. The main circuit has the advantages of simple structure, alternate conduction of two main power tubes, simple control method, ripple reduction of input /output voltage and current, and easy enhancement of power grade of the converter. When the power tubes are switched off, the clamping capacitor can absorb the energy on the leakage inductance of the primary windings of the transformer, so that the voltage stress on the power tubes is reduced. The main circuit has the characteristics of electrical input/output isolation, high efficiency, high reliability, etc. Thereby, the main circuit has wide application prospects on large-power occasions input by low voltage.
Description
One, technical field:
What the present invention relates to is the main circuit topology of a kind of anti-DC-DC of swashing, belongs to power electronics DC-DC technology.
Two, background technology:
Anti exciting converter reliability height, circuit topology is succinct, the input and output electrical isolation, the lifting/voltage reducing wide ranges is easy to multichannel output.The effect of energy storage inductor but its isolating transformer has been held concurrently, transformer leakage inductance is big, power tube due to voltage spikes height.The ripple of output voltage is bigger, and it is big to cause exporting the filter element size.And the voltage loads regulation is not high, these effects limit the power of anti exciting converter increase, usually can only be below 150W.
In order to improve the anti exciting converter through-put power, so someone proposes a kind of interleaving inverse excitation type converter, this converter is made of the simple parallel connection of two single inverse excitation type converters, shared same dc bus of these two anti exciting converters and shared same output filter capacitor, two staggered conductings of main power tube.This structure has increased the through-put power of converter, has reduced the input and output voltage current ripples, reduced the size of output filter element, but it does not improve the high unfavorable factor of inverse excitation type converter power tube due to voltage spikes.
People such as C.P.Henze in 1989 have proposed the interleaving inverse excitation type converter of active-clamp, and it is that active-clamp inverse excitation type converter parallel connection by two common DC buses and output filter capacitor constitutes, the conducting that interlocks of two main power tubes.Because clamping capacitance can effectively absorb the energy of the former limit of transformer leakage inductance, so this converter has also reduced the voltage stress of power tube when not only having all advantages of interleaving inverse excitation converter.But this circuit is owing to increased by two auxiliary switches, two clamping capacitances.Components and parts are many in the circuit, and control is complicated.1996, people such as Robert Watson proposed a kind of interleaving inverse excitation type converter of novel active-clamp, and its clamp circuit is by a switching tube, and a booster diode and a clamping capacitance constitute.Though the active clamping alternation inverse excitation type converter than the front has lacked a switching tube and a clamping capacitance, but components and parts are more, control is complicated.
Three, summary of the invention:
The objective of the invention is problem at the prior art existence, develop a kind of simple in structure, components and parts are few, control is simple, can reduce the main power tube voltage stress, have the main circuit topology of the interleaving inverse excitation type converter that has clamping capacitance of high efficiency and reliability.
The main circuit of interleaving inverse excitation type converter that has clamping capacitance of the present invention, comprise two-way inverse excitation type converter crisscross parallel circuit: be connected in the former limit of first transformer winding end of the same name by the input positive source, but not end of the same name is connected in first main power tube drain electrode that is parallel with first body diode, and source electrode is connected in the input power cathode and forms first loop; Be connected in the drain electrode of second the main power that is parallel with second body diode by the input positive source, and source electrode is connected in the end of the same name of the former limit of second transformer winding, its non-same polarity is connected in the input power cathode and forms second loop; First transformer in first loop, the non-same polarity of the second transformer secondary winding in second loop first rectifier diode of connecting respectively, parallel with one another behind second rectifier diode, first rectifier diode, first transformer in the negative electrode of second rectifier diode and first loop, the second transformer secondary winding in second a loop end of the same name output filter capacitor in parallel, form two output-parallel loops, be connected a clamping capacitance between second main power tube source electrode in the series connection point of the former limit of first transformer winding non-same polarity that it is characterized in that first loop and first main power tube drain electrode and second loop and the series connection point of second transformer former limit winding end of the same name.
The present invention has two power tubes, two transformers, two rectifier diodes, a clamping capacitance and an output filter capacitor.In each switch periods, the conducting that interlocks of two power tubes, control is simple.Staggered structure makes it can transmit bigger power, and the input and output voltage current ripples is little, and output filter spare size is little.When clamping capacitance turn-offs at power tube, can absorb the energy on the transformer leakage inductance, reduce the voltage stress on the power tube.Therefore the middle high power occasion in the low pressure input has a wide range of applications.
Four, description of drawings:
Fig. 1 is the main circuit of interleaving inverse excitation type converter schematic diagram that has clamping capacitance
Fig. 2 (a) ~ (d) is the operation mode figure that has the interleaving inverse excitation type converter of clamping capacitance
Each designation is as follows among Fig. 1 and Fig. 2:
U
1---input supply voltage
T
1, T
2---be respectively two transformers in the converter
L
R1, L
M1---be respectively T
1The leakage inductance and the magnetizing inductance of the former limit of transformer winding
L
R2, L
M2---be respectively T
2The leakage inductance and the magnetizing inductance of the former limit of transformer winding
i
P1, i
P2---be respectively and flow through T
1And T
2The electric current of former limit winding
Q
1, Q
2---be respectively two main power tubes of converter
Q
D1, Q
D2---be respectively Q
1And Q
2Body diode
C
p---clamping capacitance
U
Cp---clamping capacitance voltage
D
1, D
2---be respectively secondary two rectifier diodes
i
S1, i
S2---be respectively and flow through T
1And T
2The electric current of secondary winding
U
o---output voltage
Five, embodiment:
Fig. 1 is the main circuit of interleaving inverse excitation type converter schematic diagram that the present invention has clamping capacitance, and as shown in Figure 1, inverter main circuit of the present invention comprises two-way inverse excitation type converter crisscross parallel circuit, by input power supply U
1Positive pole is connected in first transformer T successively
1The leakage inductance L of former limit winding
R1With magnetizing inductance L
M1, series and parallel has body diode Q again
D1First main power tube Q
1After, be connected in input power supply U
1Negative pole is formed first loop; By input power supply U
1Positive pole is connected in and is parallel with body diode Q
D2Second main power Q
2, second transformer T more successively connects
2The leakage inductance L of former limit winding
R2With magnetizing inductance L
M2After be connected in input power supply U
1Negative pole is formed second loop; Clamping capacitance C
pBe connected the first loop transformer T
1Former limit winding non-same polarity and main power tube Q
1The series connection point and the second loop main power tube Q of drain electrode
2Source electrode and transformer T
2Between the series connection point of former limit winding end of the same name.Two transformer T
1, T
2The secondary winding output rectifier diode D that connects separately
1, D
2The back is parallel with one another, output filter capacitor C
oBe connected two transformer T
1, T
2Secondary winding end of the same name and two rectifier diode D
1, D
2Form two output-parallel loops between the negative pole.Therefore in fact this converter forms by having added a clamping capacitance after the combination of two single tube anti exciting converters.Because the clamping capacitance size is different with work duty ratio size, circuit working mode can be slightly different, but its main operation mode can be described below in a switch periods:
Mode 1: as Fig. 2 (a), main power tube Q
1Conducting, transformer T
1Former limit winding current i
P1Beginning is linear rises transformer T
1Energy storage, rectifier diode D
1Instead end partially.Main power tube Q
2Still be in off state, rectifier diode D
2Conducting, transformer T
2Release energy.Clamping capacitance C
pWith leakage inductance L
R2Beginning resonance, transformer T
2Former limit winding current i
P2Be negative value, by transformer T
2The energy of transmission is made of two parts: 1. clamping capacitance C
pOn energy with positive energizing mode by transformer T
2Pass to secondary, 2. magnetizing inductance L
M2On
Energy storage with anti-energizing mode by transformer T
2Pass to secondary.As transformer T
2Former limit winding current i
P2When oppositely being reduced to zero, positive energizing mode quits work transformer T
2Only be operated under the anti-energizing mode.As main power tube Q
1During shutoff, this mode finishes.
Mode 2: as Fig. 2 (b), main power tube Q
1Turn-off main power tube Q
2Keep off state.Main power tube Q
1Have no progeny in the pass because transformer T
1Inductive current can not suddenly change, so force body diode Q
D2With rectifier diode D
1Conducting, transformer T
1Release energy to load.Body diode Q
D2Conducting is leakage inductance L
R1The release of energy provides path, transformer T
1Former limit winding current i
P1Give clamping capacitance C
PCharging, so main power tube Q
1Due to voltage spikes less.Body diode Q
D2Conducting make input supply voltage U
1Be added in magnetizing inductance L
M2With leakage inductance L
R2On, transformer T
2Former limit winding current i
P2Linear increase, rectifier diode D
2Turn-off.As main power tube Q
2This mode finishes after the conducting.
Mode 3: as Fig. 2 (c), main power tube Q
2Conducting, transformer T
2Former limit winding current i
P2Beginning is linear rises transformer T
2Energy storage, rectifier diode D
2Instead end partially.Main power tube Q
1Still be in off state, rectifier diode D
1Conducting, transformer T
1Release energy.Clamping capacitance C
pWith leakage inductance L
R1Beginning resonance, transformer T
1Former limit winding current i
P1Be negative value, by transformer T
1The energy of transmission is made of two parts: 1. clamping capacitance C
pOn energy with positive energizing mode by transformer T
1Pass to secondary, 2. magnetizing inductance L
M1On energy storage with anti-energizing mode by transformer T
1Pass to secondary.As transformer T
1Former limit winding current i
P1When oppositely being reduced to zero, positive energizing mode quits work transformer T
1Only be operated under the anti-energizing mode.As main power tube Q
2During shutoff, this mode finishes.
Mode 4: as Fig. 2 (d), main power tube Q
2Turn-off main power tube Q
1Keep off state.Main power tube Q
2Have no progeny in the pass because transformer T
2Inductive current can not suddenly change, so force body diode Q
D1With rectifier diode D
2Conducting, transformer T
2Release energy to load.Body diode Q
D1Conducting is leakage inductance L
R2The release of energy provides path, transformer T
2Former limit winding current i
P2Give clamping capacitance C
PCharging, so main power tube Q
2Due to voltage spikes also less.Body diode Q
D1Conducting make input supply voltage U
1Be added in magnetizing inductance L
M1With leakage inductance L
R1On, transformer T
1Former limit winding current i
P1Linear increase, rectifier diode D
1Turn-off.As main power tube Q
1This mode finishes after the conducting once more.
Claims (1)
1. a main circuit of interleaving inverse excitation type converter that has clamping capacitance comprises two-way inverse excitation type converter crisscross parallel circuit: by input power supply (U
i) positive pole is connected in the first transformer (T
1) former limit winding end of the same name, but not end of the same name is connected in and is parallel with the first body diode (Q
D1) first main power tube (Q
1) drain electrode, and source electrode is connected in input power supply (U
i) negative pole forms first loop; By input power supply (U
i) positive pole is connected in and is parallel with the second body diode (Q
D2) second main power tube (Q
2) drain electrode, and source electrode is connected in the second transformer (T
2) end of the same name of former limit winding, its non-same polarity is connected in input power supply (U
i) negative pole forms second loop; First transformer (the T
1), the second transformer (T
2) non-same polarity of the secondary winding first rectifier diode (D that connects respectively
1), the second rectifier diode (D
2) back parallel with one another, the first rectifier diode (D
1), the second rectifier diode (D
2) the negative electrode and the first transformer (T
1), the second transformer (T
2) a secondary winding end of the same name output filter capacitor (C in parallel
o), form two output-parallel loops, it is characterized in that the first transformer (T
1) former limit winding non-same polarity and first main power tube (Q
1) drain electrode series connection point and second main power tube (Q
2) source electrode and the second transformer (T
2) connect a clamping capacitance (C between the series connection point of former limit winding end of the same name
p).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100412017A CN100364219C (en) | 2005-07-27 | 2005-07-27 | Main circuit of interleaving inverse excitation type converter with clamping capacitance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100412017A CN100364219C (en) | 2005-07-27 | 2005-07-27 | Main circuit of interleaving inverse excitation type converter with clamping capacitance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1728517A CN1728517A (en) | 2006-02-01 |
| CN100364219C true CN100364219C (en) | 2008-01-23 |
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ID=35927601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100412017A Expired - Fee Related CN100364219C (en) | 2005-07-27 | 2005-07-27 | Main circuit of interleaving inverse excitation type converter with clamping capacitance |
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| Country | Link |
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| CN (1) | CN100364219C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787766B (en) * | 2017-02-08 | 2019-07-05 | 深圳市华星光电技术有限公司 | Circuit of reversed excitation and electronic device |
| CN106849670B (en) * | 2017-03-10 | 2019-11-22 | 广州金升阳科技有限公司 | A kind of inverse-excitation type switch power-supply |
| CN110460259B (en) * | 2019-07-25 | 2021-06-22 | 南京邮电大学 | Ten-switch staggered clamping three-phase photovoltaic inverter topological structure |
| CN112968621A (en) * | 2021-02-17 | 2021-06-15 | 青岛大学 | Single-stage composite active clamping push-pull flyback inverter |
| CN112928927A (en) * | 2021-02-17 | 2021-06-08 | 青岛大学 | Composite active clamping push-pull flyback DC-DC converter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4618919A (en) * | 1984-10-04 | 1986-10-21 | Sperry Corporation | Topology for miniature power supply with low voltage and low ripple requirements |
| CN1545195A (en) * | 2003-11-19 | 2004-11-10 | 南京航空航天大学 | Positive and negative excitation bidirectional DC-DC converter |
-
2005
- 2005-07-27 CN CNB2005100412017A patent/CN100364219C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4618919A (en) * | 1984-10-04 | 1986-10-21 | Sperry Corporation | Topology for miniature power supply with low voltage and low ripple requirements |
| CN1545195A (en) * | 2003-11-19 | 2004-11-10 | 南京航空航天大学 | Positive and negative excitation bidirectional DC-DC converter |
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| Publication number | Publication date |
|---|---|
| CN1728517A (en) | 2006-02-01 |
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