CN102570400A - Intrinsically safe high-power switch converter output short-circuit protection device and method - Google Patents
Intrinsically safe high-power switch converter output short-circuit protection device and method Download PDFInfo
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- CN102570400A CN102570400A CN2012100648227A CN201210064822A CN102570400A CN 102570400 A CN102570400 A CN 102570400A CN 2012100648227 A CN2012100648227 A CN 2012100648227A CN 201210064822 A CN201210064822 A CN 201210064822A CN 102570400 A CN102570400 A CN 102570400A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 2
- 239000002817 coal dust Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000009977 dual effect Effects 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
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Abstract
The invention discloses an intrinsically safe high-power switch converter output short-circuit protection device and an intrinsically safe high-power switch converter output short-circuit protection method, which are applied to explosion hazard environments of gas, coal dust and the like. The device comprises an input signal joint, a soft starting circuit, a quick turn-off circuit and a switching tube which are connected with a detection circuit. The device is simple in structure, safe and reliable, and can realize quick turn-off and start of a circuit.
Description
Technical field
The present invention relates to a kind of intrinsic safety type switch converters output short circuit protection device and method, especially a kind of intrinsic safety type high power switch converter output short circuit protection device and method that uses at explosive hazard environments such as gas, coal dusts that is applicable to.
Background technology
Intrinsically safe power supply various intrinsic safety type equipment in hazardous environments such as colliery, oil, chemical industry use.So-called essential safe type is a kind of of type of explosion proof construc tion, by GB GB3836.4 standard.The design of essential safe type circuit, the energy limited of the electric spark that produces during exactly the circuit position short circuit of load or regulation within the specific limits.Except that must meeting the GB3836.4 standard-required, the intrinsically safe circuit spark ignition experiment that also must carry out through the explosion-proof test testing agency of national appointment.
Because series of advantages such as the volume of Switching Power Supply is little, efficient height, intrinsic safety electric source develops the trend that is inevitable by linear power supply to Switching Power Supply, and switch converters is the core component of Switching Power Supply.The peak power output of present domestic essential safety Switching Power Supply is generally about 18W.Traditional protection design has constant-current type usually, subtracts the flow pattern mode, is shortcomings such as power consumption is big but there is protection in this dual mode; More advanced protected mode is the type mode of damming at present, but this mode needs from recovery, and common deadline is bigger, has limited the raising of intrinsic safety electric source power.Use in the colliery etc. intrinsic safety electric source the most extensive by explosion-proof occasion, and this has formed the bottleneck of the peak power output of present intrinsic safety electric source, can not break through this power bottleneck, then can't adapt to equipment to improving the requirement of intrinsic safety electric source output capacity.
Summary of the invention
Technical problem: the objective of the invention is to overcome the weak point in the prior art, a kind of simple in structure, safe and reliable intrinsic safety type high power switch converter output short circuit protection device and method is provided.
Technical scheme: intrinsic safety type high power switch converter output short circuit protection device of the present invention; Comprise the input signal joint, soft starting circuit, quick breaking circuit and the switching tube that link to each other with testing circuit; The input signal joint is connected with the input of soft starting circuit with quick breaking circuit respectively, and soft starting circuit is connected with switching tube respectively with the output of quick breaking circuit; Said soft starting circuit comprises resistance R 1, dipole triode V1, capacitor C 1; Series resistance R1 between the pin 1 of dipole triode V1 and the pin 2; Series capacitance C1 between the pin 1 of dipole triode V1 and the pin 3, pin 3 ground connection of dipole triode V1; Said quick breaking circuit comprises resistance R 2 and dipole triode V2; Series resistance R1 and resistance R 2 between the pin 1 of dipole triode V2 and the 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, and 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 detected fault, testing circuit sent low level signal, and the input signal joint receives low level signal;
B. the input signal joint is transmitted into the base stage of the dipole triode V2 of quick breaking circuit with low level signal, and V2 is open-minded for the dipole triode, and the electric capacity between the grid source of switching tube Q1 discharges through V2;
C. switching tube Q1 turn-offs fast, thereby cuts off the effect that entire circuit plays protection;
D. after testing circuit detected the eliminating of discovery fault, testing circuit sent high level signal, and the input signal joint receives high level signal;
E. the input signal joint is transmitted into high level signal the base stage of the dipole triode V1 of soft starting circuit; Dipole triode V1 opens the grid of opening switching tube Q1; At this moment the input IN of switching tube Q1 and output OUT are open-minded, realize the soft start of the subsequent conditioning circuit that switching tube Q1 connects.
Beneficial effect: owing to adopted technique scheme, the present invention can make mine intrinsic safety electric source under the situation of output short circuit, the interior shutoff fast of short time that can be implemented in 5us exported switching tube Q1, and realizes the soft start of switching tube Q1.Switching tube Q1 turn-offs fast, makes output current also be cut off fast, has reduced the energy that short dot discharges, thereby improves the power of intrinsic safety electric source; Soft start can make switching tube Q1 slowly open-minded, reduces rush of current, thereby improves the security performance of intrinsic safety electric source.This scheme is easy to realize duplicate protection in addition, the related request of National standard.
Description of drawings
Fig. 1 is a protective circuit structured flowchart of the present invention.
Fig. 2 is a protective circuit schematic diagram of the present invention.
Fig. 3 is an example block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are done further to describe:
As shown in Figure 1; Intrinsic safety type high power switch converter output short circuit protection device of the present invention; Comprise input signal joint, soft starting circuit, quick breaking circuit and switching tube; The input signal joint is connected with the input of soft starting circuit with 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 R 1, dipole triode V1, capacitor C 1; Be in series with resistance R 1 between the pin 1 of dipole triode V1 and the pin 2; Be in series with capacitor C 1 between the pin 1 of dipole triode V1 and the pin 3, pin 3 ground connection of dipole triode V1; Breaking circuit comprises resistance R 2 and dipole triode V2 fast; Series resistance R1 and resistance R 2 between the pin 1 of dipole triode V2 and the pin 2; Pin 3 ground connection; The pin 1 of dipole triode V2 also is connected with the trigger end of switching tube Q1, and 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; Testing circuit is delivered to the current drives end of being made up of soft starting circuit and quick breaking circuit with detected converter output current, thereby switching tube Q1 is realized soft start and turn-offs fast.
Intrinsic safety type high power switch converter output short circuit protection method of the present invention:
During a. normal non-failure conditions, switching tube Q1 conducting, when testing circuit detected fault, testing circuit sent low level signal, and the input signal joint receives low level signal;
B. the input signal joint is transmitted into the base stage of the dipole triode V2 of quick breaking circuit with low level signal, and V2 is open-minded for the dipole triode, and the electric capacity between the grid source of switching tube Q1 discharges through V2;
C. switching tube Q1 turn-offs fast, thereby cuts off the effect that entire circuit plays protection;
D. after testing circuit detected the eliminating of discovery fault, testing circuit sent high level signal, and the input signal joint receives high level signal;
E. the input signal joint is transmitted into high level signal the base stage of the dipole triode V1 of soft starting circuit; Dipole triode V1 opens the grid of opening switching tube Q1; Make switching tube Q1 grid voltage slowly rise, switching tube Q1 is slowly open-minded, and the electric current through Q1 slowly rises; At this moment the input IN of switching tube Q1 and output OUT are open-minded, realize the soft start of the subsequent conditioning circuit that switching tube Q1 connects.
Claims (2)
1. intrinsic safety type high power switch converter output short circuit protection device; It is characterized in that: it comprises input signal joint, soft starting circuit, quick breaking circuit and the switching tube that links to each other with testing circuit; The input signal joint is connected with the input of soft starting circuit with quick breaking circuit respectively, and soft starting circuit is connected with switching tube respectively with the output of quick breaking circuit; Said soft starting circuit comprises resistance R 1, dipole triode V1, capacitor C 1; Series resistance R1 between the pin 1 of dipole triode V1 and the pin 2; Series capacitance C1 between the pin 1 of dipole triode V1 and the pin 3, pin 3 ground connection of dipole triode V1; Said quick breaking circuit comprises resistance R 2 and dipole triode V2; Series resistance R1 and resistance R 2 between the pin 1 of dipole triode V2 and the 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, and the source electrode of switching tube Q1 meets input IN, and drain electrode meets output OUT.
2. according to the intrinsic safety type high power switch converter output short circuit protection method of the said device of claim 1, it is characterized in that:
A. when testing circuit detected fault, testing circuit sent low level signal, and the input signal joint receives low level signal;
B. the input signal joint is transmitted into the base stage of the dipole triode V2 of quick breaking circuit with low level signal, and V2 is open-minded for the dipole triode, and the electric capacity between the grid source of switching tube Q1 discharges through V2;
C. switching tube Q1 turn-offs fast, thereby cuts off the effect that entire circuit plays protection;
D. after testing circuit detected the eliminating of discovery fault, testing circuit sent high level signal, and the input signal joint receives high level signal;
E. the input signal joint is transmitted into high level signal the base stage of the dipole triode V1 of soft starting circuit; Dipole triode V1 opens the grid of opening switching tube Q1; At this moment the input IN of switching tube Q1 and output OUT are open-minded, realize 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 true CN102570400A (en) | 2012-07-11 |
| CN102570400B CN102570400B (en) | 2015-08-19 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052258A (en) * | 2013-03-12 | 2014-09-17 | 万国半导体股份有限公司 | Fault Tolerant Power Supply Incorporating Intelligent Load Switch To Provide Uninterrupted Power |
| CN104065028A (en) * | 2013-03-19 | 2014-09-24 | 台达电子工业股份有限公司 | Electronic fuse wire device and operation method thereof |
| CN106385338A (en) * | 2016-10-08 | 2017-02-08 | 深圳万发创新进出口贸易有限公司 | Communication equipment system having fault protection function |
| US9705395B2 (en) | 2013-03-12 | 2017-07-11 | Alpha And Omega Semiconductor Incorporated | Fault tolerant power supply incorporating intelligent gate driver-switch circuit to provide uninterrupted power |
| US9846469B2 (en) | 2013-03-12 | 2017-12-19 | Alpha And Omega Semiconductor Incorporated | Fault tolerant power supply incorporating intelligent load switch to provide uninterrupted power |
| CN110601522A (en) * | 2019-09-11 | 2019-12-20 | 深圳市航天新源科技有限公司 | Distribution circuit with short-circuit protection function |
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2012
- 2012-03-13 CN CN201210064822.7A patent/CN102570400B/en not_active Expired - Fee Related
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052258A (en) * | 2013-03-12 | 2014-09-17 | 万国半导体股份有限公司 | Fault Tolerant Power Supply Incorporating Intelligent Load Switch To Provide Uninterrupted Power |
| US9705395B2 (en) | 2013-03-12 | 2017-07-11 | Alpha And Omega Semiconductor Incorporated | Fault tolerant power supply incorporating intelligent gate driver-switch circuit 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 |
| US9846469B2 (en) | 2013-03-12 | 2017-12-19 | Alpha And Omega Semiconductor Incorporated | Fault tolerant power supply incorporating intelligent load switch to provide uninterrupted power |
| CN104065028A (en) * | 2013-03-19 | 2014-09-24 | 台达电子工业股份有限公司 | Electronic fuse wire device and operation method thereof |
| 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 |
| CN106385338A (en) * | 2016-10-08 | 2017-02-08 | 深圳万发创新进出口贸易有限公司 | Communication equipment system having fault protection function |
| 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 |
| CN110601522A (en) * | 2019-09-11 | 2019-12-20 | 深圳市航天新源科技有限公司 | Distribution circuit with short-circuit protection function |
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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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