CN103618459A - Forward and flyback voltage-multiplying rectifier converter with primary side connected in series and secondary side output connected in parallel - Google Patents
Forward and flyback voltage-multiplying rectifier converter with primary side connected in series and secondary side output connected in parallel Download PDFInfo
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- CN103618459A CN103618459A CN201310704956.5A CN201310704956A CN103618459A CN 103618459 A CN103618459 A CN 103618459A CN 201310704956 A CN201310704956 A CN 201310704956A CN 103618459 A CN103618459 A CN 103618459A
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- 238000004804 winding Methods 0.000 claims description 40
- 230000035939 shock Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 description 39
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
A forward and flyback voltage-multiplying rectifier converter with serially connected primary sides and parallelly connected secondary side outputs of transformers comprises a primary side input circuit, a secondary side forward rectification circuit, a secondary side flyback rectification circuit and a filter circuit. The converter secondary side forward rectifying circuit and the flyback rectifying circuit alternately provide energy for a load, secondary side outputs are connected in parallel, so that output current is doubled, and ripples are reduced; the primary side active clamping circuit realizes zero voltage switching-on of the switching tube, and secondary side leakage inductance and capacitance resonance create a diode zero current turn-off condition, so that the efficiency is improved; the whole circuit uses fewer active power devices, and has simple structure and low cost; the control scheme is simple and easy to realize.
Description
One, technical field
The present invention relates to a kind of soft switch straight convertor, by transformer primary side connect, the positive flyback voltage doubling rectifing circuit of secondary output-parallel, can realize secondary normal shock rectification circuit and flyback rectification circuit and alternately to load, provide energy, belong to the straight convertor in electrical energy changer.
Two, background technology
Along with the development of power electronic technology, straight convertor has obtained studying widely and applying, and high reliability, high power density, small size are the targets of converter development always.With respect to traditional single phase transformer voltage doubling rectifing circuit, the positive flyback voltage doubling rectifing circuit of two transformer secondary output-parallels can be so that output current increasing be twice, ripple reduces, the feature that simultaneously retains former limit switching tube, the soft switch of secondary diode, realizes that machine volume is little, lightweight, conversion efficiency advantages of higher.
Three, summary of the invention
1, goal of the invention: the object of the invention is to provide a kind of straight convertor that can realize relatively high power, high efficiency, low ripple.
2, technical scheme: in order to solve the problems of the technologies described above, transformer primary side series connection of the present invention, the positive flyback voltage multiplying rectifier of secondary output-parallel converter comprise former limit input circuit 1, secondary normal shock rectification circuit 2, secondary flyback rectification circuit 3 and filter circuit 4.Former limit input circuit 1 comprises the first switching tube S
1, the second power switch tube S
2, the first transformer T
1former limit winding P
1, the second transformer T
2former limit winding P
2and first capacitor C
1; Secondary normal shock rectification circuit 2 comprises the first transformer T
1secondary winding N
1, the first transformer T
1leakage inductance L
1, the second capacitor C
2, the first diode D
1with the second diode D
2; Secondary flyback rectification circuit 3 comprises the second transformer T
2secondary winding N
2, the second transformer T
2leakage inductance L
2, the 3rd capacitor C
3, the 3rd diode D
3with the 4th diode D
4; Filter circuit 4 comprises the 4th capacitor C
4.The positive flyback voltage multiplying rectifier converter of former limit series connection of the present invention, secondary output-parallel is characterised in that, the first transformer T
1former limit winding P
1same Name of Ends and the first capacitor C
1one end be connected with the positive pole of external power supply E; The first transformer T
1former limit winding P
1non-same polarity and the second transformer T
2former limit winding P
2same Name of Ends connect; The first capacitor C
1the other end and the first switching tube S
1drain electrode be connected; The first switching tube S
1source electrode and the second transformer T
2former limit winding P
2non-same polarity and second switch pipe S
2drain electrode connect; Second switch pipe S
2source electrode be connected with the negative pole of external power supply E.The first transformer T
1secondary winding N
1same Name of Ends and the first transformer T
1leakage inductance L
1one end is connected; The first transformer T
1leakage inductance L
1the other end and the second capacitor C
2one end be connected; The second capacitor C
2the other end, the 3rd capacitor C
3one end, the first diode D
1negative electrode, the 3rd diode D
3negative electrode, the 4th capacitor C
4one end be connected with one end of external load R; The first transformer T
1secondary winding N
1non-same polarity and the first diode D
1anode and the second diode D
2negative electrode be connected; The second diode D
2anode, the 4th diode D
4anode, the 4th capacitor C
4the other end be connected with the other end of external load R; The second transformer T
2secondary winding N
2non-same polarity and the second transformer T
2leakage inductance L
2one end is connected; The second transformer T
2leakage inductance L
2the other end and the 3rd capacitor C
3the other end be connected; The second transformer T
2secondary winding N
2same Name of Ends and the 3rd diode D
3anode and the 4th diode D
4negative electrode be connected.
3, beneficial effect: transformer primary side series connection of the present invention, the positive flyback voltage multiplying rectifier of secondary output-parallel converter, tool has the following advantages: (1) secondary normal shock rectification circuit and flyback rectification circuit alternately provide energy to load, output current increasing is twice, and current ripples reduces; (2) realize high frequency electrical isolation; (3) to realize switch tube zero voltage open-minded for former limit active clamping circuir, and secondary voltage multiplying rectifier is realized diode zero-current switching, has promoted efficiency; (4) it is less, simple in structure that whole circuit is used active power device, and expense is little; (5) control program is simple, is easy to realize.
Four, accompanying drawing explanation
Fig. 1 is the electrical block diagram of transformer primary side of the present invention series connection, the positive flyback voltage multiplying rectifier of secondary output-parallel converter, label title: 1. former limit input circuit; 2. secondary normal shock rectification circuit; 3. secondary flyback rectification circuit; 4. filter circuit.
Fig. 2 is transformer primary side series connection of the present invention, each switch mode schematic diagram of the positive flyback voltage multiplying rectifier of secondary output-parallel converter circuit;
Main designation in figure: S
1, S
2---first, second switching tube; C
1～C
4---the first～four electric capacity; T
1, T
2---first, second transformer; P
1, P
2---first, second transformer primary side winding; N
1, N
2---first, second transformer secondary winding; L
1, L
2---first, second transformer leakage inductance; E---external power supply; D
1～D
4---the first～four diode; R---external load;
Five, embodiment
As shown in Figure 1, the positive flyback voltage multiplying rectifier converter of the series connection of the transformer primary side of this example, secondary output-parallel is characterised in that, the first transformer T
1former limit winding P
1same Name of Ends and the first capacitor C
1one end be connected with the positive pole of external power supply E; The first transformer T
1former limit winding P
1non-same polarity and the second transformer T
2former limit winding P
2same Name of Ends connect; The first capacitor C
1the other end and the first switching tube S
1drain electrode be connected; The first switching tube S
1source electrode and the second transformer T
2former limit winding P
2non-same polarity and second switch pipe S
2drain electrode connect; Second switch pipe S
2source electrode be connected with the negative pole of external power supply E.The first transformer T
1secondary winding N
1same Name of Ends and the first transformer T
1leakage inductance L
1one end is connected; The first transformer T
1leakage inductance L
1the other end and the second capacitor C
2one end be connected; The second capacitor C
2the other end, the 3rd capacitor C
3one end, the first diode D
1negative electrode, the 3rd diode D
3negative electrode, the 4th capacitor C
4one end be connected with one end of external load R; The first transformer T
1secondary winding N
1non-same polarity and the first diode D
1anode and the second diode D
2negative electrode be connected; The second diode D
2anode, the 4th diode D
4anode, the 4th capacitor C
4the other end be connected with the other end of external load R; The second transformer T
2secondary winding N
2non-same polarity and the second transformer T
2leakage inductance L
2one end is connected; The second transformer T
2leakage inductance L
2the other end and the 3rd capacitor C
3the other end be connected; The second transformer T
2secondary winding N
2same Name of Ends and the 3rd diode D
3anode and the 4th diode D
4negative electrode be connected.
The thinking of transformer primary side series connection, secondary output-parallel, further improves power capacity, improves the characteristics such as current ripples, stress.Retain transformer leakage inductance and secondary capacitor resonance simultaneously, for the soft switch of secondary diode has been created condition, and then reduce loss.
Accompanying drawing 1 take below as main circuit structure, by reference to the accompanying drawings 2 specific works principle and the operation modes of narrating transformer primary side of the present invention series connection, the positive flyback voltage multiplying rectifier of secondary output-parallel converter.The voltage magnitude of remembering extraneous power supply E is U
d; The first capacitor C
1voltage be U
c1; First and second transformer T
1, T
2primary current is i
1.
Operation mode I: as shown in Fig. 2 (a), second switch pipe S
2conducting, extraneous power supply E voltage U
dbe added in first and second transformer primary side winding P
1, P
2upper, first and second transformer T
1, T
2primary current i
1linear rising, starts to secondary transferring energy; The first diode D now
1oppositely cut-off, the first transformer secondary winding N
1and second capacitor C
2through the second diode D
2zhi Luxiang the 4th capacitor C
4and load R provides energy; While the 4th diode D
4oppositely cut-off, the second transformer secondary winding N
2through the 3rd diode D
3to the 3rd capacitor C
3charging, portion of energy is transferred to the 3rd capacitor C
3.This stage, the first transformer T
1leakage inductance L
1with the second capacitor C
2there is resonance, the second transformer T
2leakage inductance L
2with the 3rd capacitor C
3resonance occurs, and is the second diode D
2, the 3rd diode D
3created zero-current switching condition.This resonance current is amounted to ，Yu Yuan limit, former limit exciting current and is jointly formed transformer primary side current i
1.
Operation mode II: as shown in Fig. 2 (b), second switch pipe S
2normally, now first and second transformer leakage inductance L
1, L
2with second and third capacitor C
2, C
3resonant process completes, second and third diode D
2, D
3naturally cut-off, realizes zero-current switching.Load is by the 4th capacitor C
4maintain power supply.Primary current i
1only contain exciting current part, continue to rise to second switch pipe S
2turn-off.
Operation mode III: as shown in Fig. 2 (c), the first switching tube S
1conducting, the first capacitor C
1voltage be U
c1be added in first and second transformer primary side winding P
1, P
2upper, first and second transformer T
1, T
2primary current i
1reverse linear increases, and starts to secondary transferring energy; The 3rd diode D now
3oppositely cut-off, the second transformer secondary winding N
2and second capacitor C
3through the 4th diode D
4zhi Luxiang the 4th capacitor C
4and load R provides energy; While the second diode D
2oppositely cut-off, the first transformer secondary winding N
1through the first diode D
1to the second capacitor C
2charging, portion of energy is transferred to the second capacitor C
2.This stage, the first transformer T
1leakage inductance L
1with the second capacitor C
2there is resonance, the second transformer T
2leakage inductance L
2with the 3rd capacitor C
3resonance occurs, and is the first diode D
1, the 4th diode D
4created zero-current switching condition.This resonance current is amounted to ，Yu Yuan limit, former limit exciting current and is jointly formed transformer primary side current i
1.
Operation mode IV: as shown in Fig. 2 (d), the first switching tube S
1normally, now first and second transformer leakage inductance L
1, L
2with second and third capacitor C
2, C
3resonant process completes, first, fourth diode D
1, D
4naturally cut-off, realizes zero-current switching.Load is by the 4th capacitor C
4maintain power supply.Primary current i
1only contain exciting current part, continue oppositely to rise to the first switching tube S
1turn-off.
As seen from the above description, transformer primary side series connection of the present invention, the positive flyback voltage multiplying rectifier of secondary output-parallel converter, tool has the following advantages:
1, secondary normal shock rectification circuit and flyback rectification circuit alternately provide energy to load, and output current increasing is twice, and current ripples reduces;
2, realize high frequency electrical isolation;
3, to realize switch tube zero voltage open-minded for former limit active clamping circuir, and secondary voltage multiplying rectifier is realized diode zero-current switching, has promoted efficiency;
4, it is less, simple in structure that whole circuit is used active power device, and expense is little;
5, control program is simple, is easy to realize.
Claims (1)
1. a transformer primary side series connection, the positive flyback voltage multiplying rectifier of secondary output-parallel converter comprise former limit input circuit (1), secondary normal shock rectification circuit (2), secondary flyback rectification circuit (3) and filter circuit (4).Former limit input circuit (1) comprises the first switching tube (S
1), the second power switch pipe (S
2), the first transformer (T
1) former limit winding (P
1), the second transformer (T
2) former limit winding (P
2) and the first electric capacity (C
1); Secondary normal shock rectification circuit (2) comprises the first transformer (T
1) secondary winding (N
1), the first transformer (T
1) leakage inductance (L
1), the second electric capacity (C
2), the first diode (D
1) and the second diode (D
2); Secondary flyback rectification circuit (3) comprises the second transformer (T
2) secondary winding (N
2), the second transformer (T
2) leakage inductance (L
2), the 3rd electric capacity (C
3), the 3rd diode (D
3) and the 4th diode (D
4); Filter circuit (4) comprises the 4th electric capacity (C
4).The positive flyback voltage multiplying rectifier converter of former limit series connection of the present invention, secondary output-parallel is characterised in that, the first transformer (T
1) former limit winding (P
1) Same Name of Ends and the first electric capacity (C
1) one end be connected with the positive pole of external power supply (E); The first transformer (T
1) former limit winding (P
1) non-same polarity and the second transformer (T
2) former limit winding (P
2) Same Name of Ends connect; The first electric capacity (C
1) the other end and the first switching tube (S
1) drain electrode be connected; The first switching tube (S
1) source electrode and the second transformer (T
2) former limit winding (P
2) non-same polarity and second switch pipe (S
2) drain electrode connect; Second switch pipe (S
2) source electrode be connected with the negative pole of external power supply (E).The first transformer (T
1) secondary winding (N
1) Same Name of Ends and the first transformer (T
1) leakage inductance (L
1) one end is connected; The first transformer (T
1) leakage inductance (L
1) other end and the second electric capacity (C
2) one end be connected; The second electric capacity (C
2) the other end, the 3rd electric capacity (C
3) one end, the first diode (D
1) negative electrode, the 3rd diode (D
3) negative electrode, the 4th electric capacity (C
4) one end be connected with one end of external load (R); The first transformer (T
1) secondary winding (N
1) non-same polarity and the first diode (D
1) anode and the second diode (D
2) negative electrode be connected; The second diode (D
2) anode, the 4th diode (D
4) anode, the 4th electric capacity (C
4) the other end be connected with the other end of external load (R); The second transformer (T
2) secondary winding (N
2) non-same polarity and the second transformer (T
2) leakage inductance (L
2) one end is connected; The second transformer (T
2) leakage inductance (L
2) other end and the 3rd electric capacity (C
3) the other end be connected; The second transformer (T
2) secondary winding (N
2) Same Name of Ends and the 3rd diode (D
3) anode and the 4th diode (D
4) negative electrode be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310704956.5A CN103618459A (en) | 2013-12-20 | 2013-12-20 | Forward and flyback voltage-multiplying rectifier converter with primary side connected in series and secondary side output connected in parallel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310704956.5A CN103618459A (en) | 2013-12-20 | 2013-12-20 | Forward and flyback voltage-multiplying rectifier converter with primary side connected in series and secondary side output connected in parallel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103618459A true CN103618459A (en) | 2014-03-05 |
Family
ID=50169162
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310704956.5A Pending CN103618459A (en) | 2013-12-20 | 2013-12-20 | Forward and flyback voltage-multiplying rectifier converter with primary side connected in series and secondary side output connected in parallel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103618459A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956904A (en) * | 2014-05-14 | 2014-07-30 | 江苏斯达工业科技有限公司 | Fly-back electric power converter topological structure and control method thereof |
| CN105720826A (en) * | 2016-03-24 | 2016-06-29 | 南京工业大学 | Mixed bridge type voltage-multiplying rectification output parallel single-stage inverter |
| CN105846682A (en) * | 2016-03-21 | 2016-08-10 | 南京航空航天大学 | Novel hybrid control method of forward-flyback converter |
| CN108494263A (en) * | 2018-05-07 | 2018-09-04 | 深圳市振华微电子有限公司 | A kind of Forward- flyback two-way balanced load switching power circuit |
| CN112054684A (en) * | 2020-08-12 | 2020-12-08 | 北京卫星制造厂有限公司 | Ultrahigh-voltage aerospace switch power supply circuit topological structure |
| CN112908653A (en) * | 2021-02-02 | 2021-06-04 | 浙江工业大学之江学院 | Distributed transformer and application circuit thereof |
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| 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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| CN201854188U (en) * | 2010-11-23 | 2011-06-01 | 中国电子科技集团公司第三十八研究所 | Simple and efficient DC/DC positive and negative forward converter |
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2013
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| 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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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956904A (en) * | 2014-05-14 | 2014-07-30 | 江苏斯达工业科技有限公司 | Fly-back electric power converter topological structure and control method thereof |
| CN105846682A (en) * | 2016-03-21 | 2016-08-10 | 南京航空航天大学 | Novel hybrid control method of forward-flyback converter |
| CN105846682B (en) * | 2016-03-21 | 2020-02-14 | 南京航空航天大学 | Novel hybrid control mode of forward and reverse converter |
| CN105720826A (en) * | 2016-03-24 | 2016-06-29 | 南京工业大学 | Mixed bridge type voltage-multiplying rectification output parallel single-stage inverter |
| CN108494263A (en) * | 2018-05-07 | 2018-09-04 | 深圳市振华微电子有限公司 | A kind of Forward- flyback two-way balanced load switching power circuit |
| CN112054684A (en) * | 2020-08-12 | 2020-12-08 | 北京卫星制造厂有限公司 | Ultrahigh-voltage aerospace switch power supply circuit topological structure |
| CN112908653A (en) * | 2021-02-02 | 2021-06-04 | 浙江工业大学之江学院 | Distributed transformer and application circuit thereof |
| CN112908653B (en) * | 2021-02-02 | 2021-11-09 | 浙江工业大学之江学院 | Distributed transformer and application circuit thereof |
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Application publication date: 20140305 |