CN106026627A - Method for improving surge immunity of switching power supply - Google Patents
Method for improving surge immunity of switching power supply Download PDFInfo
- Publication number
- CN106026627A CN106026627A CN201610500173.9A CN201610500173A CN106026627A CN 106026627 A CN106026627 A CN 106026627A CN 201610500173 A CN201610500173 A CN 201610500173A CN 106026627 A CN106026627 A CN 106026627A
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- CN
- China
- Prior art keywords
- surge
- power supply
- protection
- switching power
- surge protection
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Classifications
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a method for improving surge immunity of a switching power supply. On the basis of a graded discharging way, the surge energy is discharged step by step. To be specific, the method comprises: a power supply way of a switching power supply is determined, wherein whether the power supply way of a switching power supply is a direct-current input way or an alternating-current input way is determined; first-level surge protection is set and is used for discharging most of surge energy, wherein the protection is realized by combination of difference-mode surge protection and common-mode surge protection; second-level surge protection is set and is used for completing fine protection, wherein the surge residual voltage is limited in a safety voltage range in which electronic equipment can withstand and the protection is realized by a difference-mode surge protection way. Compared with the prior art, the method has the following beneficial effects: the urge immunity of a switching power supply is improved by reducing or eliminating the surge voltage or current that is generated by lightning discharging or electrical load switching; precise protection on electronic equipment is realized; the practicability is high; and the method is easy to promote.
Description
Technical field
The present invention relates to field of computer technology, a kind of practical, method of raising Switching Power Supply surge immunity.
Background technology
In Modern Digital System, integrated chip degree is more and more higher, causes it to decline the ability to bear of voltage surge.In natural cause (thunder discharge) and supply network, electrical load switching all can cause the surge voltage occurred on power line, there is sudden change in the supply voltage that can cause electronic equipment, or become the highest (several kilovolts), or become the lowest (negative several kilovolts), less on analog circuit impact；But the complete mistake of logic can be caused for Digital Logical Circuits, misoperation occurs, even directly result in the physical damage of precise electronic components and parts.
Owing in thunder and lightning transient state and supply network, electrical load switching is inevitable, so surge is prevalent in distribution system.Surge voltage or electric current cause power electronic equipment voltage to occur fluctuating by a relatively large margin, are easily caused reception, transmission error in data, cause control system exceptional reset often occur；The accumulative effect of surge can cause the performance degradation of semiconductor device, service life of equipment to shorten；Surge can constantly impact the power pack insulating barrier of electronic equipment, causes insulating barrier to puncture easily and causes personal safety accident.Switching Power Supply carrying out surge protection is necessary to modern electronic equipment, it is possible to significantly improve the capacity of resisting disturbance of electronic equipment.Based on this, the present invention proposes a kind of method improving Switching Power Supply surge immunity.
Summary of the invention
The technical assignment of the present invention is for above weak point, it is provided that a kind of practical, method of raising Switching Power Supply surge immunity.
A kind of method improving Switching Power Supply surge immunity, progressively releases surge energy by the way of classification is released, and it implements process and is:
First determine the power supply mode of Switching Power Supply, i.e. determine that Switching Power Supply is direct current input or exchange input；
Then arranging first order carrying out surge protection, be used for most surge energy of releasing, this protection uses differential mode surge protection and the combination of common mode carrying out surge protection to realize；
Second level carrying out surge protection is set and finely protects for completing, will be in the range of surge residual voltage be limited in the tolerant safe voltage of electronic equipment, this protection uses differential mode surge protection to realize.
In described first order carrying out surge protection, differential mode surge protection uses a varistor and the two poles of the earth gas-discharge tube to be used in series, and is attempted by between the line line connecting power supply input and output；Common mode carrying out surge protection uses varistor, three pole gas-discharge tubes, another varistor to be used in series, it is attempted by between the line line of connection power supply input and output, safeguard procedures are increased between the most online, safeguard procedures between this line ground realize by sharing three pole gas-discharge tubes, will this three pole gas-discharge tube ground connection.
In the carrying out surge protection of the described second level, the Switching Power Supply to direct current supply, this second level carrying out surge protection uses Transient Suppression Diode to realize, the surge residual voltage that the first order is protected is reduced to the level that late-class circuit can bear；For the Switching Power Supply of Alternating Current Power Supply, second level carrying out surge protection use varistor and the two poles of the earth gas-discharge tube are combined into differential mode surge protection.
Between first order carrying out surge protection and second level carrying out surge protection, increase inductance ensure that two-stage surging protection circuit realizes classification and releases for delay, and this inductance is air core inductor, prevents saturated inefficacy occur under the big electric current of surge.
Being additionally provided with filtering and modular converter after the carrying out surge protection of the second level, eliminate the burst pulse that surge remains after varistor, gas-discharge tube, this filtering and modular converter include DC filter, alternating current filter two parts.
A kind of method improving Switching Power Supply surge immunity of the present invention, has the advantage that
A kind of method improving Switching Power Supply surge immunity of the present invention, based on transient suppression device and low pass filters such as varistor, gas-discharge tube, Transient Suppression Diodes, by thunder discharge or the surge voltage of electrical load switching generation or electric current are reduced or eliminated, improve the surge immunity of Switching Power Supply；Realizing the accurate protection to electronic equipment, this carrying out surge protection is designed with multistage protection, reduces or eliminate the surge energy damage to sensitive components as far as possible, practical, it is easy to promote.
Accompanying drawing explanation
What accompanying drawing 1 was the present invention realizes schematic diagram.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, the present invention provides a kind of method improving Switching Power Supply surge immunity,
This patent is a kind of method for designing for improving Switching Power Supply surge immunity, based on transient suppression device and low pass filters such as varistor, gas-discharge tube, Transient Suppression Diodes, by thunder discharge or the surge voltage of electrical load switching generation or electric current are reduced or eliminated, improve the surge immunity of Switching Power Supply.
First determine Switching Power Supply power supply mode (exchange input/direct current input), the transition that secondly can bear according to sensitive components in circuit or the ability of surge voltage, consider that carrying out surge protection measure is on Switching Power Supply Leakage Current and the impact of dielectric strength simultaneously；In addition to the design factor of electronic equipment own, in addition it is also necessary to use environment to determine that electronic equipment may bear the intensity of external transition or surge voltage according to it, comprehensively determine the compound mode of surging protection circuit.
Owing to the energy of surge impact is relatively large, it is necessary to by the way of classification is released, surge energy is progressively released.
It implements process:
First order carrying out surge protection it is crucial that want through-current capacity sufficiently large, most surge energy of releasing；
Second level carrying out surge protection is fine protection, its response time want sufficiently fast while surge residual voltage can be limited in the tolerant safe voltage of electronic equipment in the range of.
Surge protective device mainly has gas-discharge tube, varistor, Transient Suppression Diode, and the through-current capacity of these three device is descending to be followed successively by: gas-discharge tube, varistor, Transient Suppression Diode；Respond is followed successively by from fast to slow: Transient Suppression Diode, varistor, gas-discharge tube.Gas-discharge tube clamp voltage is too low and its follow current time is longer, is not suitable for the direct current occasion that magnitude of voltage is higher；Varistor shortcoming is that clamp voltage is accurate not, easily sets off an explosion in short-circuit condition and cause security incident after damage；Transient Suppression Diode shortcoming is that through-current capacity is little, is suitable only for the occasion that surge energy is less.
In described first order carrying out surge protection, differential mode surge protection uses a varistor and the two poles of the earth gas-discharge tube to be used in series, and is attempted by between the line line connecting power supply input and output；Common mode carrying out surge protection uses varistor, three pole gas-discharge tubes, another varistor to be used in series, it is attempted by between the line line of connection power supply input and output, safeguard procedures are increased between the most online, safeguard procedures between this line ground realize by sharing three pole gas-discharge tubes, will this three pole gas-discharge tube ground connection.
In the carrying out surge protection of the described second level, the Switching Power Supply to direct current supply, this second level carrying out surge protection uses Transient Suppression Diode to realize, the surge residual voltage that the first order is protected is reduced to the level that late-class circuit can bear；For the Switching Power Supply of Alternating Current Power Supply, second level carrying out surge protection use varistor and the two poles of the earth gas-discharge tube are combined into differential mode surge protection.
Between first order carrying out surge protection and second level carrying out surge protection, increase inductance ensure that two-stage surging protection circuit realizes classification and releases for delay, and this inductance is air core inductor, prevents saturated inefficacy occur under the big electric current of surge.
Filtering and modular converter it is additionally provided with after the carrying out surge protection of the second level, eliminate the burst pulse that surge remains after varistor, gas-discharge tube, this filtering and modular converter include DC filter, alternating current filter two parts, connect the direct current differential mode surge protection in the carrying out surge protection of the second level, exchange differential mode surge protection, and wave filter many employings low pass electromagnetic interface filter respectively.
Above-mentioned detailed description of the invention is only the concrete case of the present invention; the scope of patent protection of the present invention includes but not limited to above-mentioned detailed description of the invention; suitably change that it is done by claims of a kind of method improving Switching Power Supply surge immunity of any present invention of meeting and any described technical field those of ordinary skill or replace, all should fall into the scope of patent protection of the present invention.
Claims (5)
1. the method improving Switching Power Supply surge immunity, it is characterised in that by the way of classification is released, surge energy is progressively released, it implements process and is:
First determine the power supply mode of Switching Power Supply, i.e. determine that Switching Power Supply is direct current input or exchange input；
Then arranging first order carrying out surge protection, be used for most surge energy of releasing, this protection uses differential mode surge protection and the combination of common mode carrying out surge protection to realize；
Second level carrying out surge protection is set and finely protects for completing, will be in the range of surge residual voltage be limited in the tolerant safe voltage of electronic equipment, this protection uses differential mode surge protection to realize.
A kind of method improving Switching Power Supply surge immunity the most according to claim 1, it is characterized in that, in described first order carrying out surge protection, differential mode surge protection uses a varistor and the two poles of the earth gas-discharge tube to be used in series, and is attempted by between the line line connecting power supply input and output；Common mode carrying out surge protection uses varistor, three pole gas-discharge tubes, another varistor to be used in series, it is attempted by between the line line of connection power supply input and output, safeguard procedures are increased between the most online, safeguard procedures between this line ground realize by sharing three pole gas-discharge tubes, will this three pole gas-discharge tube ground connection.
A kind of method improving Switching Power Supply surge immunity the most according to claim 1, it is characterized in that, in the carrying out surge protection of the described second level, Switching Power Supply to direct current supply, this second level carrying out surge protection uses Transient Suppression Diode to realize, and the surge residual voltage that the first order is protected is reduced to the level that late-class circuit can bear；For the Switching Power Supply of Alternating Current Power Supply, second level carrying out surge protection use varistor and the two poles of the earth gas-discharge tube are combined into differential mode surge protection.
A kind of method improving Switching Power Supply surge immunity the most according to claim 1, it is characterized in that, between first order carrying out surge protection and second level carrying out surge protection, increase inductance ensure that two-stage surging protection circuit realizes classification and releases for delay, and this inductance is air core inductor, prevent, under the big electric current of surge, saturated inefficacy occurs.
A kind of method improving Switching Power Supply surge immunity the most according to claim 1, it is characterized in that, filtering and modular converter it is additionally provided with after the carrying out surge protection of the second level, eliminating the burst pulse that surge remains after varistor, gas-discharge tube, this filtering and modular converter include DC filter, alternating current filter two parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610500173.9A CN106026627A (en) | 2016-06-30 | 2016-06-30 | Method for improving surge immunity of switching power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610500173.9A CN106026627A (en) | 2016-06-30 | 2016-06-30 | Method for improving surge immunity of switching power supply |
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| CN106026627A true CN106026627A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610500173.9A Pending CN106026627A (en) | 2016-06-30 | 2016-06-30 | Method for improving surge immunity of switching power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912387A (en) * | 2019-11-13 | 2020-03-24 | 北京航天易联科技发展有限公司 | Power supply circuit and military equipment system |
| CN112086952A (en) * | 2020-09-21 | 2020-12-15 | 国网湖南省电力有限公司 | Multi-stage combined lightning protection structure for overhead ground wire electricity taking device and wiring method thereof |
| CN114720748A (en) * | 2022-04-12 | 2022-07-08 | 上海晶岳电子有限公司 | Surge current protection test method, electronic equipment, storage medium and system |
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| CN201985520U (en) * | 2011-02-01 | 2011-09-21 | 中兴通讯股份有限公司 | Alternating current line lightning protection device |
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| CN203056571U (en) * | 2012-12-27 | 2013-07-10 | 徐大鹏 | Low residual voltage lightning protection device for power supply |
| CN203536955U (en) * | 2013-11-14 | 2014-04-09 | 航天长峰朝阳电源有限公司 | Multifunctional spike suppressor |
| CN104144584A (en) * | 2013-05-08 | 2014-11-12 | 苏州昆拓热控***股份有限公司 | Multi-functional cabinet air conditioner |
| CN204046874U (en) * | 2014-08-04 | 2014-12-24 | 珠海绿金能控科技有限公司 | A kind of Novel LED light |
| CN104377673A (en) * | 2013-08-13 | 2015-02-25 | 中兴通讯股份有限公司 | Surge protective device and method |
| CN105375457A (en) * | 2014-08-25 | 2016-03-02 | 潍坊学院 | LED streetlight four-stage lightning protection module |
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2016
- 2016-06-30 CN CN201610500173.9A patent/CN106026627A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201985520U (en) * | 2011-02-01 | 2011-09-21 | 中兴通讯股份有限公司 | Alternating current line lightning protection device |
| CN202190073U (en) * | 2011-07-12 | 2012-04-11 | 深圳茂硕电源科技股份有限公司 | External 12kV lightning protective circuit |
| CN202917967U (en) * | 2012-07-26 | 2013-05-01 | 京信通信技术(广州)有限公司 | Lightning protection device of direct-current power supply |
| CN203056571U (en) * | 2012-12-27 | 2013-07-10 | 徐大鹏 | Low residual voltage lightning protection device for power supply |
| CN104144584A (en) * | 2013-05-08 | 2014-11-12 | 苏州昆拓热控***股份有限公司 | Multi-functional cabinet air conditioner |
| CN104377673A (en) * | 2013-08-13 | 2015-02-25 | 中兴通讯股份有限公司 | Surge protective device and method |
| CN203536955U (en) * | 2013-11-14 | 2014-04-09 | 航天长峰朝阳电源有限公司 | Multifunctional spike suppressor |
| CN204046874U (en) * | 2014-08-04 | 2014-12-24 | 珠海绿金能控科技有限公司 | A kind of Novel LED light |
| CN105375457A (en) * | 2014-08-25 | 2016-03-02 | 潍坊学院 | LED streetlight four-stage lightning protection module |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912387A (en) * | 2019-11-13 | 2020-03-24 | 北京航天易联科技发展有限公司 | Power supply circuit and military equipment system |
| CN110912387B (en) * | 2019-11-13 | 2021-03-05 | 北京航天易联科技发展有限公司 | Power supply circuit and military equipment system |
| CN112086952A (en) * | 2020-09-21 | 2020-12-15 | 国网湖南省电力有限公司 | Multi-stage combined lightning protection structure for overhead ground wire electricity taking device and wiring method thereof |
| CN114720748A (en) * | 2022-04-12 | 2022-07-08 | 上海晶岳电子有限公司 | Surge current protection test method, electronic equipment, storage medium and system |
| CN114720748B (en) * | 2022-04-12 | 2023-08-22 | 上海晶岳电子有限公司 | Surge current protection test method, electronic equipment, storage medium and system |
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Application publication date: 20161012 |