CN104393770A - Flyback autonomous inverter - Google Patents
Flyback autonomous inverter Download PDFInfo
- Publication number
- CN104393770A CN104393770A CN201410690751.0A CN201410690751A CN104393770A CN 104393770 A CN104393770 A CN 104393770A CN 201410690751 A CN201410690751 A CN 201410690751A CN 104393770 A CN104393770 A CN 104393770A
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- Prior art keywords
- triode
- transformer
- winding
- resistance
- parallel
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
- H02M3/3381—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement using a single commutation path
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a flyback autonomous inverter which comprises a primary loop, a secondary rectifier filter circuit, a feedback loop and a starting resistor Rg. The flyback autonomous inverter has the advantages of input and output isolation, stable output voltage, simple circuit, high reliability and the like, and solves the design problem of an isolated auxiliary power supply of a star switching power supply. The size and the weight of the star switching power supply are reduced, and the power supply can also be used as an auxiliary power supply driven by a power bridge top tube.
Description
Technical field
The present invention relates to power technique fields, particularly relate to a kind of inverse-excitation type self-excitation converter.
Background technology
Requiring in the DC/DC circuit that input and output ground wire is isolated, usually adopting the method for light-coupled isolation or Magnetic isolation to feed back to pwm control circuit to the sampled signal of output voltage and carry out closed-loop control, make output voltage stabilization.Magnetic isolation circuit more complicated and apply less, the application of light-coupled isolation under space environment is restricted and does not adopt.So in satellite power supply, applying more is adopt accessory power supply to isolate, namely accessory power supply is made with the small-power power of an input and output ground wire isolation, power to the control circuit in DC/DC, altogether, such sampled signal does not just need isolation for the ground of accessory power supply and the output voltage of DC/DC.For the accessory power supply of input and output ground wire isolation, adopt the more Lip river oscillator for independent-excited single-ended converter or auto-excitation type.Independent-excited single-ended converter circuit more complicated, the Lip river oscillator of auto-excitation type can only realize isolated variable, but can not voltage stabilizing, and after adding voltage stabilizing measure, circuit also becomes more complicated, and efficiency is lower, and two schemes respectively has pluses and minuses, but is not preferred plan.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of inverse-excitation type self-excitation converter, this inverse-excitation type self-excitation converter by increasing resistance in the feedback loop, and increase that capacitance-resistance filter loop solves can not the problem of voltage stabilizing or circuit complexity.
The present invention is achieved by the following technical programs.
A kind of inverse-excitation type self-excitation converter provided by the invention, comprise loop, former limit, the current rectifying and wave filtering circuit of secondary, feedback loop and starting resistance Rg, one end of the Np winding of the transformer T1 in loop, described former limit is connected with power end, the other end is connected with the collector electrode of triode V1, the grounded emitter of described triode V1; The base stage of described triode V1 is connected with power end through starting resistance Rg; The Ns winding of the transformer T1 in the current rectifying and wave filtering circuit of described secondary is in parallel with polar capacitor C3, load RL respectively after connecting with diode D3; One end of the Nb winding of the transformer T1 in described feedback loop is connected with the base stage of triode V1 successively with after electric capacity C1, resistance Rb series connection, the two ends of described electric capacity C1 are also parallel with diode D2, the other end ground connection of the Nb winding of described transformer T1, resistance Rc and diode D1 is connected in parallel on the two ends of the Nb winding of transformer T1 after connecting, the two ends of described resistance Rc are also parallel with polar capacitor C2, are also in series with voltage stabilizing didoe V2 between described polar capacitor C2 and the base stage of triode V1.
Also be parallel with electric capacity C4 between the collector and emitter of described triode V1, the branch road at electric capacity C4 place is also in series with resistance R1.
Beneficial effect of the present invention is: have that input and output isolation, output voltage stabilization, circuit are simple, reliability high, solve the design problem of isolated form accessory power supply in star Switching Power Supply, reduce the volume and weight of star Switching Power Supply, this power supply also can be used as the accessory power supply that on power bridge, pipe drives.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention;
Fig. 2 is collector electrode and the diode current oscillogram of Fig. 1 transistor;
Fig. 3 is the switch motion schematic diagram of Fig. 1 RCC mode.
Embodiment
Further describe technical scheme of the present invention below, but described in claimed scope is not limited to.
A kind of inverse-excitation type self-excitation converter as shown in Figure 1, comprise loop, former limit, the current rectifying and wave filtering circuit of secondary, feedback loop and starting resistance Rg, one end of the Np winding of the transformer T1 in loop, described former limit is connected with power end, the other end is connected with the collector electrode of triode V1, the grounded emitter of described triode V1; The base stage of described triode V1 is connected with power end through starting resistance Rg; The Ns winding of the transformer T1 in the current rectifying and wave filtering circuit of described secondary is in parallel with polar capacitor C3, load RL respectively after connecting with diode D3; One end of the Nb winding of the transformer T1 in described feedback loop is connected with the base stage of triode V1 successively with after electric capacity C1, resistance Rb series connection, the two ends of described electric capacity C1 are also parallel with diode D2, the other end ground connection of the Nb winding of described transformer T1, resistance Rc and diode D1 is connected in parallel on the two ends of the Nb winding of transformer T1 after connecting, the two ends of described resistance Rc are also parallel with polar capacitor C2, are also in series with voltage stabilizing didoe V2 between described polar capacitor C2 and the base stage of triode V1.
Also be parallel with electric capacity C4 between the collector and emitter of described triode V1, the branch road at electric capacity C4 place is also in series with resistance R1.
The present invention, in practical work process, connects input power V
iNafter, starting current i
gby resistance R
gflow to the base stage of switching tube V1, transistor V1 conducting, the collector current i of V1
cincrease gradually by zero, waveform as shown in Figure 2.The now secondary winding N of transformer
sbe in off state, it seems from input side, electric current all flows to N
pcoil, input voltage V
iNbe added in the armature winding N of transformer
pon, coil N
bupper generation induced voltage V
b, this voltage passes through C
1and R
bthe base stage flowing to triode forms positive feedback current, makes the rapid saturation conduction of V1.Along with C
1the rising of charging voltage, is just reduced gradually to the electric current of Base injection, is maintained subsequently by D2.Along with i
clinear increase, work as i
c≤ i
b* h
fEtime, triode exits saturation condition, enters into amplification region, i
cwith i
breduction and reduce, the now secondary feedback winding N of transformer T1
bcreate 3 ends be bear, 4 ends are positive induced voltage, pass through C
1back discharge make i
bfurther reduction, impels V1 to end rapidly.Between the V1 off period, N
pthe polarity of winding be 5 to rectify, 4 ends bear, the energy trasfer stored in transformer, to output, forms load current by rectifier diode D3, its switching waveform as shown in Figure 3, when input voltage decline, i
bdecline, ton declines, if reach i
c=i
b* h
fE, transistor is because of h
fEnot enough and turn off.When D3 electric current drops to zero, each winding voltage of transformer also becomes in zero, now starting resistance R
gagain that V1 is open-minded, repeat above-mentioned work.
RCC circuit is the Switching Power Supply in a kind of on-fixed cycle, and it is not driven by duty ratio continually varying pwm control signal, but is driven by PFM control signal.When output voltage is higher than rated value, now C
2the voltage of end also rises, therefore switching tube turns off in advance, i
cpeak current reduce, flyback transformer energy storage decline, converter output voltage reduce; When output voltage is lower than rated value, switching tube postpones to turn off, i
cpeak current raise, the energy storage of transformer increases, and the output voltage of converter rises, and completes and exports voltage stabilizing adjustment process.
Triode is turned off, as long as make the drive current not enough (for collector electrode) of base stage, therefore can shunt with voltage-stabiliser tube V2, the anode of V2 and capacitor C
3negative electrode be connected.
At V1 blocking interval, N
bbe C by the D1 of conducting
2charging, its voltage is V
c, the voltage stabilizing didoe voltage of V2 is: V
2=V
c+ V
bEif, output voltage V
0rise, C
2terminal voltage V
calso rise, so voltage stabilizing didoe V2 is breakdown, the bypass that drive current is formed from it is flow through, thus makes V1 enter blocking interval, now, and C
2terminal voltage V
cfor:
Otherwise also can change V
cmake V
0change, therefore by V thereupon
2, N
s/ N
boutput voltage V can be determined
0, namely output voltage is:
If ignore V
bE, V
d1, V
d3, then output voltage V
0with V
2be directly proportional, and output voltage precision is determined by voltage stabilizing didoe V2.
Claims (2)
1. an inverse-excitation type self-excitation converter, comprise loop, former limit, the current rectifying and wave filtering circuit of secondary, feedback loop and starting resistance Rg, one end of the Np winding of the transformer T1 in loop, described former limit is connected with power end, the other end is connected with the collector electrode of triode V1, the grounded emitter of described triode V1, the base stage of described triode V1 is connected with power end through starting resistance Rg, the Ns winding of the transformer T1 in the current rectifying and wave filtering circuit of described secondary after connecting with diode D3 respectively with polar capacitor C3, load RL is in parallel, it is characterized in that: one end of the Nb winding of the transformer T1 in described feedback loop successively with electric capacity C1, resistance Rb is connected with the base stage of triode V1 after connecting, the two ends of described electric capacity C1 are also parallel with diode D2, the other end ground connection of the Nb winding of described transformer T1, resistance Rc and diode D1 is connected in parallel on the two ends of the Nb winding of transformer T1 after connecting, the two ends of described resistance Rc are also parallel with polar capacitor C2, voltage stabilizing didoe V2 is also in series with between described polar capacitor C2 and the base stage of triode V1.
2. inverse-excitation type self-excitation converter as claimed in claim 1, is characterized in that: be also parallel with electric capacity C4 between the collector and emitter of described triode V1, the branch road at electric capacity C4 place is also in series with resistance R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410690751.0A CN104393770A (en) | 2014-11-26 | 2014-11-26 | Flyback autonomous inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410690751.0A CN104393770A (en) | 2014-11-26 | 2014-11-26 | Flyback autonomous inverter |
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| Publication Number | Publication Date |
|---|---|
| CN104393770A true CN104393770A (en) | 2015-03-04 |
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|---|---|---|---|
| CN201410690751.0A Pending CN104393770A (en) | 2014-11-26 | 2014-11-26 | Flyback autonomous inverter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576979A (en) * | 2016-01-21 | 2016-05-11 | 苏州经贸职业技术学院 | Switch power supply transformer |
| CN107181400A (en) * | 2017-05-27 | 2017-09-19 | 西安交通大学 | A kind of high-order draw-out power supply self-start circuit and method |
| CN108832714A (en) * | 2016-07-27 | 2018-11-16 | 国网江苏省电力公司常州供电公司 | A kind of active power distribution network intelligent terminal battery isolation monitoring device |
| CN111030472A (en) * | 2019-12-26 | 2020-04-17 | 兰州空间技术物理研究所 | High-robustness self-starting isolation power supply circuit with adjustable output voltage |
| CN112922728A (en) * | 2021-03-22 | 2021-06-08 | 株洲航飞翔数字系统有限责任公司 | Frequency stabilization aircraft engine ignition device using two-stage power supply |
Citations (4)
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|---|---|---|---|---|
| US5412555A (en) * | 1991-03-26 | 1995-05-02 | Ricoh Company, Ltd. | Self-oscillating DC-DC Converter with zero voltage switching |
| CN1921278A (en) * | 2006-09-05 | 2007-02-28 | 广州金升阳科技有限公司 | Isolated self-oscillation reverse exciting inverter |
| CN104377965A (en) * | 2014-11-18 | 2015-02-25 | 上海空间电源研究所 | Auto-excitation DC-DC convertor |
| CN204216788U (en) * | 2014-11-26 | 2015-03-18 | 贵州航天林泉电机有限公司 | A kind of autonomous inverter |
-
2014
- 2014-11-26 CN CN201410690751.0A patent/CN104393770A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5412555A (en) * | 1991-03-26 | 1995-05-02 | Ricoh Company, Ltd. | Self-oscillating DC-DC Converter with zero voltage switching |
| CN1921278A (en) * | 2006-09-05 | 2007-02-28 | 广州金升阳科技有限公司 | Isolated self-oscillation reverse exciting inverter |
| CN104377965A (en) * | 2014-11-18 | 2015-02-25 | 上海空间电源研究所 | Auto-excitation DC-DC convertor |
| CN204216788U (en) * | 2014-11-26 | 2015-03-18 | 贵州航天林泉电机有限公司 | A kind of autonomous inverter |
Non-Patent Citations (1)
| Title |
|---|
| 李瑞轩: "RCC 变换器在航天器上的应用研究", 《万方数据企业知识服务平台》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576979A (en) * | 2016-01-21 | 2016-05-11 | 苏州经贸职业技术学院 | Switch power supply transformer |
| CN108832714A (en) * | 2016-07-27 | 2018-11-16 | 国网江苏省电力公司常州供电公司 | A kind of active power distribution network intelligent terminal battery isolation monitoring device |
| CN107181400A (en) * | 2017-05-27 | 2017-09-19 | 西安交通大学 | A kind of high-order draw-out power supply self-start circuit and method |
| CN107181400B (en) * | 2017-05-27 | 2019-12-03 | 西安交通大学 | A kind of high position draw-out power supply self-start circuit and method |
| CN111030472A (en) * | 2019-12-26 | 2020-04-17 | 兰州空间技术物理研究所 | High-robustness self-starting isolation power supply circuit with adjustable output voltage |
| CN111030472B (en) * | 2019-12-26 | 2023-04-14 | 兰州空间技术物理研究所 | High-robustness self-starting isolation power supply circuit with adjustable output voltage |
| CN112922728A (en) * | 2021-03-22 | 2021-06-08 | 株洲航飞翔数字系统有限责任公司 | Frequency stabilization aircraft engine ignition device using two-stage power supply |
| CN112922728B (en) * | 2021-03-22 | 2022-02-11 | 株洲航飞翔数字系统有限责任公司 | Frequency stabilization aircraft engine ignition device using two-stage power supply |
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Application publication date: 20150304 |