CN102801293A - Protective device for inhibiting power-on surge current - Google Patents
Protective device for inhibiting power-on surge current Download PDFInfo
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- CN102801293A CN102801293A CN2011101330819A CN201110133081A CN102801293A CN 102801293 A CN102801293 A CN 102801293A CN 2011101330819 A CN2011101330819 A CN 2011101330819A CN 201110133081 A CN201110133081 A CN 201110133081A CN 102801293 A CN102801293 A CN 102801293A
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Abstract
The invention relates to spaceborne electronic equipment, and discloses a protective device for inhibiting a power-on surge current. The protective device comprises a surge inhibiting circuit which is formed by arranging an input end overcurrent protective circuit [101] at a power switch end and arranging an integrating circuit [102], a power amplifying circuit [103], a common mode filter [104] and a differential mode filter [105] in sequence after the overcurrent protective circuit [101]; and the surge inhibiting circuit is connected with subsequent electronic equipment through a coupling transformer. By using the protective device, damage or misoperation of a product and even the influence on normal work and the like because of the electromagnetic induction of a starting current of other equipment caused by the power-on surge current of a switching power supply are avoided. The protective device has the advantages of simple design, and stability and reliability at work. The quality and the performance of power supply are improved.
Description
Technical field
The present invention relates to spaceborne technical field of electronic equipment, especially a kind of protective device of the surge current that suppresses to start shooting.
Background technology
Surge is meant that mainly power supply rigidly connects the strong pulse that logical that moment breath produces; This is because the unintentional nonlinearity characteristic of switching power circuit own, and it is exactly the protective circuit of utilizing non-linear element that the sensitiveness of high frequency surge is designed that the start surge current suppresses protective device.
Satellite is when domestic flight; Carry out the open and close machine of some unit according to mission program; In order to prevent that surge current that these units produce in open and close moments to the damage of electronic equipment and control system or produce misoperation, requiring to increase surge current inhibition protective device.Along with the development of spaceborne electronic equipment, the electronic product of installation is more and more, and the surge of spaceborne power electronic equipment is suppressed to have proposed new requirement.Especially the excessive starting current of sensing miscellaneous equipment from cable that reaches of surge current when power initiation often causes impaired or other electronic equipment generation misoperation of product, thereby influences the reliability and the life-span of spaceborne electronic equipment.
The protective device of prior art adopts thermistor as surge suppression device usually, obviously can not satisfy the demand of production development.
Do not have at present to find and the explanation or the report of the similar correlation technique of the present invention, do not collect both at home and abroad similarly data as yet yet.
Summary of the invention
Surge current is excessive and sense the starting current of miscellaneous equipment and cause impaired or other electronic equipment of spaceborne electronic equipment to produce the problems such as reliability and life-span of misoperation, the spaceborne electronic equipment of influence from cable when starting in order to solve spaceborne electronic equipment power source, the object of the present invention is to provide a kind of protective device of the surge current that suppresses to start shooting.Utilize the present invention, can effectively protect spaceborne power electronic equipment system and control system.
In order to reach the foregoing invention purpose, the technical scheme that the present invention is adopted for its technical problem of solution provides a kind of protective device of the surge current that suppresses to start shooting, and this device comprises:
Be provided with an input current foldback circuit at the mains switch end, after current foldback circuit, be disposed with integrating circuit and be used for power supply when start change in voltage and be tending towards slow; Power amplification circuit [103] is used to suppress the power supply immediate current of boot-strap; Common mode filtering [104] and differential mode filtering [105] are used to suppress the common mode and the differential mode noise of Switching Power Supply; The surge restraint circuit that foregoing circuit is formed is connected with follow-up electronic equipment through coupling transformer again.
The present invention's suppress to start shooting protective device of surge current; Owing to take above-mentioned technical scheme; Adopt FET to suppress surge current effectively; Avoid thermistor can not effectively suppress the defective of surge current because of powering on continuously, particularly when little electric current, low voltage operating, FET can be used as voltage-controlled variable linear resistance and the very little contactless electronic beam switch of conducting resistance.Therefore the invention solves Switching Power Supply start surge current and cause electromagnetic induction to make product impaired or produce misoperation to the starting current of miscellaneous equipment, even influence the problem of spaceborne electronic equipment operate as normal.Improved the security reliability of spaceborne electronic equipment, prevented that effectively product from producing disastrous fault.Obtained following beneficial effect for this reason:
1. product electric power system and control system have effectively been protected;
2. have high flexibility, reliability;
3. circuit is simple and safe reliable, low cost of manufacture;
4. improved the power supply power supply quality.
Description of drawings
Accompanying drawing is the present invention's suppress to start shooting theory diagram of protective device of surge current.
Embodiment
Below in conjunction with description of drawings the preferred embodiments of the present invention.
Accompanying drawing is the present invention's suppress to start shooting theory diagram of protective device of surge current, and shown in the embodiment of accompanying drawing, this device comprises:
Be provided with an input current foldback circuit 101 at the mains switch end, be used for overcurrent protection; After current foldback circuit 101, be disposed with integrating circuit 102, change in voltage is tending towards slow when being used for the power supply start; Power amplification circuit [103] is used to suppress the power supply immediate current of boot-strap; Common mode filtering [104] and differential mode filtering [105] are used to suppress the common mode and the differential mode noise of Switching Power Supply; Foregoing circuit is formed surge restraint circuit, suppresses the flashy surge current of start.Be connected with follow-up electronic equipment through coupling transformer again.
Above-mentioned integrating circuit 102, power amplification circuit 103 adopt FETs, not only effectively suppress the start surge current, and under the situation that powers on continuously, it are more effective to suppress surge current.
Further the course of work of the present invention is described below.
When control unit is connected the 28V power supply at that moment; Overcurrent protection is played in input overcurrent protection 101; Form surge restraint circuit by integrating circuit 102, power amplification 103, common mode filtering 104 and differential mode filtering 105, suppressed the surge current that start moment supply convertor (DC/DC) produces.The present invention is directed to Switching Power Supply and can produce bigger surge current in the moment of starting shooting; So that spaceborne electronic equipment sustains damage or produces misoperation, according to law of conservation of energy, because needed gross energy remains unchanged during powering on; Therefore; The integrating circuit and the power amplification circuit that adopt FET to form suppress to have eliminated the surge pulse current, reach the purpose that reduces immediate current.Pass through common mode filtering 104 and differential mode filtering 105 two-stage filtering again, further improved the power supply quality of power supply.
The present invention adopts FET to suppress surge current effectively; Can avoid thermistor can not effectively suppress the defective of surge current because of powering on continuously; Particularly when little electric current, low voltage operating, FET can be used as voltage-controlled variable linear resistance and the very little contactless electronic beam switch of conducting resistance.
Claims (2)
1. the protective device of the surge current that suppresses to start shooting; It is characterized in that; This device comprises: be provided with an input current foldback circuit [101] at the mains switch end, be disposed with integrating circuit [102] afterwards at current foldback circuit [101] and be used for power supply when start change in voltage and be tending towards slow; Power amplification circuit [103] is used to suppress the power supply immediate current of boot-strap; Common mode filtering [104] and differential mode filtering [105] are used to suppress the common mode and the differential mode noise of Switching Power Supply; The surge restraint circuit that foregoing circuit is formed is connected with follow-up electronic equipment through coupling transformer again.
2. protective device as claimed in claim 1 is characterized in that: described integrating circuit [102], power amplification circuit [103] adopt FET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101330819A CN102801293A (en) | 2011-05-23 | 2011-05-23 | Protective device for inhibiting power-on surge current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101330819A CN102801293A (en) | 2011-05-23 | 2011-05-23 | Protective device for inhibiting power-on surge current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102801293A true CN102801293A (en) | 2012-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101330819A Pending CN102801293A (en) | 2011-05-23 | 2011-05-23 | Protective device for inhibiting power-on surge current |
Country Status (1)
| Country | Link |
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| CN (1) | CN102801293A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885343A (en) * | 2012-12-20 | 2014-06-25 | 中国科学院沈阳自动化研究所 | Wireless gateway device with explosion suppression and electromagnetic shielding function |
| CN105302267A (en) * | 2015-12-09 | 2016-02-03 | 浪潮电子信息产业股份有限公司 | Method for reducing surge voltage of power supply input end of server system |
| CN105827103A (en) * | 2015-01-05 | 2016-08-03 | 华为技术有限公司 | Surge current preventing circuit and power supply |
| CN113243143A (en) * | 2018-12-21 | 2021-08-10 | 法雷奥照明公司 | Method for limiting current surges in automotive lighting devices |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201243207Y (en) * | 2008-08-15 | 2009-05-20 | 吕淑明 | Power-saving device |
| CN201561307U (en) * | 2009-11-04 | 2010-08-25 | 河源市超越光电科技有限公司 | LED lighting lamp |
| CN102035168A (en) * | 2009-09-30 | 2011-04-27 | 富士通天株式会社 | Overcurrent protection circuit and in-vehicle display device |
-
2011
- 2011-05-23 CN CN2011101330819A patent/CN102801293A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201243207Y (en) * | 2008-08-15 | 2009-05-20 | 吕淑明 | Power-saving device |
| CN102035168A (en) * | 2009-09-30 | 2011-04-27 | 富士通天株式会社 | Overcurrent protection circuit and in-vehicle display device |
| CN201561307U (en) * | 2009-11-04 | 2010-08-25 | 河源市超越光电科技有限公司 | LED lighting lamp |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885343A (en) * | 2012-12-20 | 2014-06-25 | 中国科学院沈阳自动化研究所 | Wireless gateway device with explosion suppression and electromagnetic shielding function |
| CN105827103A (en) * | 2015-01-05 | 2016-08-03 | 华为技术有限公司 | Surge current preventing circuit and power supply |
| CN105827103B (en) * | 2015-01-05 | 2018-11-30 | 华为技术有限公司 | A kind of circuit and power supply of pre- impulse-current-proof |
| CN105302267A (en) * | 2015-12-09 | 2016-02-03 | 浪潮电子信息产业股份有限公司 | Method for reducing surge voltage of power supply input end of server system |
| CN113243143A (en) * | 2018-12-21 | 2021-08-10 | 法雷奥照明公司 | Method for limiting current surges in automotive lighting devices |
| CN113243143B (en) * | 2018-12-21 | 2024-05-07 | 法雷奥照明公司 | Method for limiting current surges in automotive lighting devices |
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Application publication date: 20121128 |