CN102570400B - A kind of intrinsic safety type high power switch converter output short-circuit protection method - Google Patents
A kind of intrinsic safety type high power switch converter output short-circuit protection method Download PDFInfo
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- CN102570400B CN102570400B CN201210064822.7A CN201210064822A CN102570400B CN 102570400 B CN102570400 B CN 102570400B CN 201210064822 A CN201210064822 A CN 201210064822A CN 102570400 B CN102570400 B CN 102570400B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 19
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 abstract description 2
- 239000002360 explosive Substances 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
A kind of intrinsic safety type high power switch converter output short-circuit protection method, is applicable at the explosive hazard environment such as gas, coal dust.Adopt the input signal joint, soft starting circuit, quick breaking circuit and the switching tube that are connected with testing circuit.Mine intrinsic safety electric source can be made when output short circuit, can realize turning off output switch pipe Q1 fast within the short time of 5us, and realize the soft start of switching tube Q1.Switching tube Q1 turns off fast, and output current is also cut off fast, reduces the energy of short dot release, thus improves the power of intrinsic safety electric source; Soft start can make switching tube Q1 slowly open-minded, reduces rush of current, thus improves the security performance of intrinsic safety electric source.Its structure is simple, safe and reliable, can the quick shutoff of realizing circuit and startup.
Description
Technical field
The present invention relates to a kind of intrinsic safety type switch converters output short-circuit protection method, especially a kind of intrinsic safety type high power switch converter output short-circuit protection method being applicable to use at the explosive hazard environment such as gas, coal dust.
Background technology
Intrinsically safe power supply is various intrinsic safety type equipment use in the hazardous environments such as colliery, oil, chemical industry.So-called essential safe type is the one of type of explosion proof construc tion, by GB GB3836.4 specification.The design of essence safety type circuits, the energy limited of the electric spark produced during circuit position short circuit exactly load or regulation within the specific limits.Except must meeting GB3836.4 standard-required, the intrinsically safe circuit spark ignition experiment that the explosion-proof test testing agency that also must be specified by country is carried out.
Due to series of advantages such as the volume of Switching Power Supply are little, efficiency is high, intrinsic safety electric source develops to Switching Power Supply the trend that is inevitable by linear power supply, and switch converters is the core component of Switching Power Supply.The peak power output of current domestic essential safety Switching Power Supply is generally at about 18W.Traditional design protection usually has constant-current type, subtracts flow pattern mode, but it is the shortcomings such as power consumption is large that these two kinds of modes exist protection; Protected mode more advanced is at present type mode of damming, but which needs self-recoverage, and usually comparatively greatly, limits the raising of intrinsic safety electric source power deadline.Intrinsic safety electric source in colliery etc. explosion-proof occasion use the most extensive, this results in the bottleneck of the peak power output of current intrinsic safety electric source, this power bottleneck can not be broken through, then cannot adapt to equipment to the requirement improving intrinsic safety electric source output capacity.
Summary of the invention
Technical problem: the object of the invention is the weak point overcome in prior art, the intrinsic safety type high power switch converter output short-circuit protection method providing a kind of structure simple, safe and reliable.
Technical scheme: intrinsic safety type high power switch converter output short circuit protective device of the present invention, comprise the input signal joint, soft starting circuit, quick breaking circuit and the switching tube that are connected with testing circuit, input signal joint is connected with the input of soft starting circuit and quick breaking circuit respectively, and soft starting circuit is connected with switching tube respectively with the output of quick breaking circuit; Described soft starting circuit comprises resistance R1, dipole triode V1, electric capacity C1, series resistance R1 between the pin 1 of dipole triode V1 and pin 2, pin 3 ground connection of series capacitance C1 between the pin 1 of dipole triode V1 and pin 3, dipole triode V1; Described quick breaking circuit comprises resistance R2 and dipole triode V2, series resistance R1 and resistance R2 between the pin 1 of dipole triode V2 and pin 2, pin 3 ground connection of dipole triode V2, the pin 1 of dipole triode V2 is connected with the trigger end of switching tube Q1, the source electrode of switching tube Q1 meets input IN, and drain electrode meets output OUT.
Intrinsic safety type high power switch converter output short-circuit protection method of the present invention:
A. when testing circuit detects fault, testing circuit sends low level signal, and input signal joint receives low level signal;
B. low level signal is transmitted into the base stage of the dipole triode V2 of quick breaking circuit by input signal joint, and V2 is open-minded for dipole triode, and the electric capacity between the grid source of switching tube Q1 is discharged by V2;
C. switching tube Q1 turns off fast, thus cuts off the effect that whole circuit plays protection;
D. after testing circuit detects discovery failture evacuation, testing circuit sends high level signal, and input signal joint receives high level signal;
E. high level signal is transmitted into the base stage of the dipole triode V1 of soft starting circuit by input signal joint, dipole triode V1 opens the grid opening switching tube Q1, at this moment the input IN of switching tube Q1 and output OUT is open-minded, realizes the soft start of the subsequent conditioning circuit that switching tube Q1 connects.
Beneficial effect: owing to have employed technique scheme, the present invention can make mine intrinsic safety electric source when output short circuit, can realize turning off output switch pipe Q1 fast within the short time of 5us, and realizes the soft start of switching tube Q1.Switching tube Q1 turns off fast, and output current is also cut off fast, reduces the energy of short dot release, thus improves the power of intrinsic safety electric source; Soft start can make switching tube Q1 slowly open-minded, reduces rush of current, thus improves the security performance of intrinsic safety electric source.In addition the program is easy to realize duplicate protection, meets the related request of national standard.
Accompanying drawing explanation
Fig. 1 is protective circuit structured flowchart of the present invention.
Fig. 2 is protective circuit schematic diagram of the present invention.
Fig. 3 is example block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As shown in Figure 1; intrinsic safety type high power switch converter output short circuit protective device of the present invention; comprise input signal joint, soft starting circuit, fast breaking circuit and switching tube; input signal joint is connected with the input of soft starting circuit and quick breaking circuit respectively, and soft starting circuit is connected with the input of switching tube respectively with the output of quick breaking circuit.
As shown in Figure 2, soft starting circuit comprises resistance R1, dipole triode V1, electric capacity C1, resistance R1 is in series with between the pin 1 of dipole triode V1 and pin 2, electric capacity C1 is in series with, pin 3 ground connection of dipole triode V1 between the pin 1 of dipole triode V1 and pin 3; Quick breaking circuit comprises resistance R2 and dipole triode V2, series resistance R1 and resistance R2 between the pin 1 of dipole triode V2 and pin 2, pin 3 ground connection, the pin 1 of dipole triode V2 is also connected with the trigger end of switching tube Q1, the source electrode of switching tube Q1 meets input IN, and drain electrode meets output OUT.
As shown in Figure 3, switching tube Q1 is connected on the output of switch converters, the converter output current detected is delivered to the current drives end be made up of soft starting circuit and quick breaking circuit by testing circuit, thus switch tube Q1 realizes soft start and turns off fast.
Intrinsic safety type high power switch converter output short-circuit protection method of the present invention:
A. during normal non-fault situation, switching tube Q1 conducting, when testing circuit detects fault, testing circuit sends low level signal, and input signal joint receives low level signal;
B. low level signal is transmitted into the base stage of the dipole triode V2 of quick breaking circuit by input signal joint, and V2 is open-minded for dipole triode, and the electric capacity between the grid source of switching tube Q1 is discharged by V2;
C. switching tube Q1 turns off fast, thus cuts off the effect that whole circuit plays protection;
D. after testing circuit detects discovery failture evacuation, testing circuit sends high level signal, and input signal joint receives high level signal;
E. high level signal is transmitted into the base stage of the dipole triode V1 of soft starting circuit by input signal joint, dipole triode V1 opens the grid opening switching tube Q1, switching tube Q1 grid voltage is made slowly to increase, switching tube Q1 is slowly open-minded, slowly risen by the electric current of Q1, at this moment the input IN of switching tube Q1 and output OUT is open-minded, realizes the soft start of the subsequent conditioning circuit that switching tube Q1 connects.
Claims (1)
1. an intrinsic safety type high power switch converter output short-circuit protection method, adopt the input signal joint, soft starting circuit, quick breaking circuit and the switching tube that are connected with testing circuit, input signal joint is connected with the input of soft starting circuit and quick breaking circuit respectively, and soft starting circuit is connected with switching tube respectively with the output of quick breaking circuit; It is characterized in that: the soft starting circuit of employing comprises resistance R1, dipole triode V1, electric capacity C1, series resistance R1 between the emitter of dipole triode V1 and base stage, series capacitance C1 between the emitter of dipole triode V1 and collector electrode, the grounded collector of dipole triode V1; Described quick breaking circuit comprises resistance R2 and dipole triode V2, series resistance R1 and resistance R2 between the emitter of dipole triode V2 and base stage, the grounded collector of dipole triode V2, the emitter of dipole triode V2 is connected with the trigger end of switching tube Q1, the source electrode of switching tube Q1 meets input IN, and drain electrode meets output OUT; Switching tube Q1 is connected on the output of switch converters, the converter output current detected is delivered to the current drives end be made up of soft starting circuit and quick breaking circuit by testing circuit, thus switch tube Q1 realizes soft start and turns off fast; Output short-circuit protection method is as follows:
A. during normal non-fault situation, switching tube Q1 conducting, when testing circuit detects fault, testing circuit sends low level signal, and input signal joint receives low level signal;
B. low level signal is transmitted into the base stage of the dipole triode V2 of quick breaking circuit by input signal joint, and V2 is open-minded for dipole triode, and the electric capacity between the grid source of switching tube Q1 is discharged by V2;
C. switching tube Q1 turns off fast, thus cuts off the effect that whole circuit plays protection;
D. after testing circuit detects discovery failture evacuation, testing circuit sends high level signal, and input signal joint receives high level signal;
E. high level signal is transmitted into the base stage of the dipole triode V1 of soft starting circuit by input signal joint, dipole triode V1 opens the grid opening switching tube Q1, switching tube Q1 grid voltage is made slowly to increase, switching tube Q1 is slowly open-minded, slowly risen by the electric current of Q1, at this moment the input IN of switching tube Q1 and output OUT is open-minded, realizes the soft start of the subsequent conditioning circuit that switching tube Q1 connects.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210064822.7A CN102570400B (en) | 2012-03-13 | 2012-03-13 | A kind of intrinsic safety type high power switch converter output short-circuit protection method |
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| CN201210064822.7A CN102570400B (en) | 2012-03-13 | 2012-03-13 | A kind of intrinsic safety type high power switch converter output short-circuit protection method |
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| CN102570400A CN102570400A (en) | 2012-07-11 |
| CN102570400B true CN102570400B (en) | 2015-08-19 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9106075B2 (en) | 2013-03-12 | 2015-08-11 | Alpha And Omega Semiconductor Incorporated | Fault tolerant power supply incorporating intelligent gate driver-switch circuit to provide uninterrupted power |
| US9367111B2 (en) | 2013-03-12 | 2016-06-14 | Alpha And Omega Semiconductor Incorporated | Fault tolerant power supply incorporating intelligent load switch to provide uninterrupted power |
| CN104052258B (en) * | 2013-03-12 | 2017-10-24 | 万国半导体股份有限公司 | The fault-tolerant power supply of the introducing load switch of uninterrupted power source is provided |
| CN104065028B (en) * | 2013-03-19 | 2017-03-01 | 台达电子工业股份有限公司 | Electronic insurance silk device and its operational approach |
| CN106385338B (en) * | 2016-10-08 | 2019-05-17 | 深圳联想懂的通信有限公司 | Facility communication system with failure protection function |
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| CN101977474A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance |
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| CN202503267U (en) * | 2012-03-13 | 2012-10-24 | 中国矿业大学 | Intrinsic safety type output short circuit protection device of high power switch converter |
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| JPH06197445A (en) * | 1992-12-24 | 1994-07-15 | Nec Kansai Ltd | Transistor protection circuit |
| CN102231594A (en) * | 2011-07-12 | 2011-11-02 | 顺德职业技术学院 | Drive circuit for preventing oscillation of grid drive signals |
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- 2012-03-13 CN CN201210064822.7A patent/CN102570400B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200965668Y (en) * | 2006-10-30 | 2007-10-24 | 西安森兰科贸有限责任公司 | Intrinsic safe computer for mine rescue |
| CN201230273Y (en) * | 2008-05-29 | 2009-04-29 | 上海煤科实业有限公司 | Outputting intrinsic safety electric power device |
| CN101771260A (en) * | 2009-12-26 | 2010-07-07 | 中国矿业大学 | Mine intrinsic safety electric source interception self-recovery protection device |
| CN101997423A (en) * | 2010-10-29 | 2011-03-30 | 广州金升阳科技有限公司 | Self-oscillating flyback converter with function of output short circuit protection |
| CN101977474A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance |
| CN202503267U (en) * | 2012-03-13 | 2012-10-24 | 中国矿业大学 | Intrinsic safety type output short circuit protection device of high power switch converter |
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Inventor after: Yu Yuesen Inventor after: He Wei Inventor after: Zeng Yibo Inventor after: Fang En Inventor after: Jia Na Inventor after: Wu Xiaojie Inventor after: Qian Jiansheng Inventor after: Li Shiguang Inventor before: Yu Yuesen Inventor before: Zhang Changlong Inventor before: Wu Xiaojie Inventor before: Dai Peng Inventor before: Zhang Wang Inventor before: Xie Dongying Inventor before: Feng Haibing Inventor before: Li Shiguang Inventor before: Jia Na Inventor before: Wang Bin |
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Free format text: CORRECT: INVENTOR; FROM: YU YUESEN WU XIAOJIE DAI PENG ZHANG WANG XIE DONGYING FENG HAIBING LI SHIGUANG JIA NA WANG BIN ZHANG CHANGLONG TO: YU YUESEN HE WEI CENG YIBO FANG EN JIA NA WU XIAOJIE QIAN JIANSHENG LI SHIGUANG |
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Inventor after: Yu Yuesen Inventor after: He Wei Inventor after: Zeng Yibo Inventor after: Fang En Inventor after: Jia Na Inventor after: Wu Xiaojie Inventor after: Zhou Juan Inventor after: Li Shiguang Inventor before: Yu Yuesen Inventor before: He Wei Inventor before: Zeng Yibo Inventor before: Fang En Inventor before: Jia Na Inventor before: Wu Xiaojie Inventor before: Qian Jiansheng Inventor before: Li Shiguang |
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