CN202076780U - Self-adapting anti-lightning anti-surging control circuit - Google Patents
Self-adapting anti-lightning anti-surging control circuit Download PDFInfo
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- CN202076780U CN202076780U CN2011200336283U CN201120033628U CN202076780U CN 202076780 U CN202076780 U CN 202076780U CN 2011200336283 U CN2011200336283 U CN 2011200336283U CN 201120033628 U CN201120033628 U CN 201120033628U CN 202076780 U CN202076780 U CN 202076780U
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Abstract
The utility model relates to a self-adapting anti-lightning anti-surging control circuit applied in a switching power source, which comprises an anti-surging unit, a switching unit, a sampling unit and a control driving unit, wherein the anti-surging unit is connected between a filtering and rectifying circuit and a power switching circuit, the switching unit is connected in parallel with the anti-surging unit and adjusts an input impedance of the switching power source, the sampling unit is connected with the filtering and rectifying circuit and collects surging signals of the filtering and rectifying circuit, and the control driving unit is connected with the sampling unit and generates a driving control signal to control the on or off of the control driving unit according to the surging signals. In case of surging phenomena, the self-adapting anti-lightning anti-surging control circuit can limit currents by detecting the change in voltage of the output end of the filtering and rectifying circuit and adjusting the input impedance of the switching power source according to the change in voltage, so as to protect the security and the service life of power devices and other elements and increase power supply efficiency.
Description
Technical field
The utility model relates to the surge protection field, relates in particular to the anti-surge control circuit of a kind of self adaptation lightning protection.
Background technology
Along with the fast development of power technology, volume is little, efficient is high owing to having for Switching Power Supply, so compare traditional linear power supply, its range of application is more extensive.Especially in fields such as computer, communication, Industry Control, instrument and meter, Medical Devices, Switching Power Supply has replaced linear power supply gradually, is producing enormous function.
Simultaneously, energy-conservation and environmental protection has become the basic demand of the whole world to energy consumption equipment.In the practical application of communication power supply and industrial power, the environmental condition that power supply is worked is more and more abominable, the cryogenic conditions of power work by original-25 ℃ of operate as normal require to drop to-40 ℃ or lower still can operate as normal.The hot conditions of power work by original+55 ℃ operate as normal require to rise+75 ℃ or higher still can operate as normal.And in the start of power supply, use unusually or all surge can occur during thunderbolt, this will cause great influence to the normal use of power supply.Therefore, generally when designing power supply, all anti-surge circuit can be set.
In the prior art, anti-surge circuit generally uses thermistor, controllable silicon parallel resistance or relay power resistor in parallel etc.Adopt simple thermistor, though can increase the impedance of power supply input circuit, effectively prevent cold boot surge, thunderbolt and switching overvoltage, it also can reduce power-efficient, and it is impaired etc. to cause the surge current of heat start to reach power greatly simultaneously.Adopt the controllable silicon parallel resistance, though make the high/low-temperature impact performance good, must add in its control and drive the winding driving, loss is bigger in middle large power supply; Adopt relay power resistor in parallel,, can't prevent to be struck by lightning and huge surge current that switching overvoltage causes causes damage to its power device though can fully limit the start surge current.
In sum, the prior art scheme all can't satisfy can be anti-lightning strike and the start surge, do not reduce the requirement of power-efficient again.
The utility model content
Main purpose of the present utility model provides the anti-surge control circuit of a kind of self adaptation lightning protection, is intended to satisfy to prevent thunderbolt and start surge, does not reduce power-efficient again.
The utility model provides a kind of self adaptation lightning protection to prevent the surge control circuit, is applied in the Switching Power Supply, and this Switching Power Supply comprises ac-input power supply, filter rectifier and the power converting circuit that connects successively.
The anti-surge control circuit of this self adaptation lightning protection can comprise anti-surge unit, switch element, sampling unit and control drive unit; Wherein, described anti-surge unit is connected between described filter rectifier and the power converting circuit; Described switch element is in parallel with anti-surge unit, the input impedance of by-pass cock power supply; Described sampling unit is connected with filter rectifier, gathers the surging signal of filter rectifier; Described control drive unit is connected with sampling unit, according to described surging signal, produces drive control signal, controls the conducting of described switch element or ends.
Preferably, above-mentioned sampling unit comprises that the conduction impedance with switch element is a sampling resistor, is connected with described filter rectifier, gathers the surging signal of filter rectifier.
Preferably, above-mentioned sampling unit also comprises voltage reference, reaches the bleeder circuit and the buffer circuit that are connected successively with voltage reference; Voltage reference is connected with sampling resistor, and the negative voltage surging signal that sampling resistor is collected carries out level conversion, and the surging signal of process level conversion is to the voltage signal that changes reference voltage from zero.
Preferably, above-mentioned control drive unit comprises control circuit and drive circuit; Wherein control circuit comprises reference power source and comparator, the input of described comparator is connected with reference power source and described buffer circuit respectively, the reference signal of surging signal and reference power source generation is compared, the output control signal, control drive unit produces driving voltage; Described drive circuit comprises driving power, first switching tube and second switch pipe, the base stage of described second switch pipe is connected with the output of described comparator, grounded emitter, collector electrode is connected with the base stage of described first switching tube, the emitter of described first switching tube is connected with driving power, and collector electrode is connected with described switch element.
Preferably, above-mentioned control circuit also comprises emitter follower, and described emitter follower is connected between buffer circuit and the comparator.
Preferably, above-mentioned switch element is field effect transistor or relay.
Preferably; when switch element is field effect transistor; the unrestrained control circuit that gushes of above-mentioned self adaptation lightning protection also comprises the driving protected location; be connected between control drive unit and the switch element; and also be connected with filter rectifier; according to the output voltage of filter rectifier, regulate the driving voltage that control drive unit produces.
Preferably, above-mentioned driving protected location comprises triode and TVS diode, and the base stage of described triode is connected with control drive unit, and collector electrode is connected with filter rectifier, and emitter is connected with control drive unit and switch element respectively; Described TVS diode is connected with collector electrode with the emitter of triode respectively.
The surge control circuit is prevented in the lightning protection of the utility model self adaptation; change in voltage by detection filter rectification circuit output end GND-1; and adjust the input impedance of Switching Power Supply according to this change in voltage; thereby can be when the surge phenomenon occurring the size of limit inrush currents; the safety and the life-span of elements such as protection power device, improve power-efficient.
Description of drawings
Fig. 1 is the structural representation of anti-surge control circuit one embodiment of the utility model self adaptation lightning protection;
Fig. 2 is the electrical block diagram of sampling unit and control drive unit among anti-surge control circuit one embodiment of the utility model self adaptation lightning protection;
Fig. 3 is the structural representation of anti-another embodiment of surge control circuit of the utility model self adaptation lightning protection;
Fig. 4 is the electrical block diagram that drives protected location among anti-another embodiment of surge control circuit of the utility model self adaptation lightning protection.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Further specify the technical solution of the utility model below in conjunction with Figure of description and specific embodiment.
Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 1 is the structural representation of anti-surge control circuit one embodiment of the utility model self adaptation lightning protection.
The anti-surge control circuit 2 of present embodiment self adaptation lightning protection can be applicable in the Switching Power Supply 1, can certainly be applied in other power circuits, for example anti exciting converter, pfc circuit etc.This Switching Power Supply 1 comprises ac-input power supply 10, filter rectifier 11 and the power converting circuit 12 that connects successively.The anti-surge control circuit 2 of this self adaptation lightning protection comprises anti-surge unit 20, switch element 21, sampling unit 22 and control drive unit 23.Wherein, anti-surge unit 20 is connected between filter rectifier 11 and the power converting circuit 12; Switch element 21 is in parallel with anti-surge unit 20, the input impedance of scalable Switching Power Supply 1; Sampling unit 22 is connected with filter rectifier 11, can gather the surging signal of filter rectifier 11; Control drive unit 23 is connected with sampling unit 22, and the surging signal that can obtain according to sampling unit 22 produces drive control signal, with the conducting of control switch unit 21 or end.
When start surge, thunderbolt or switching overvoltage occurring, the voltage at the output GND_1 place of filter rectifier 11 will reduce rapidly, then control drive unit 23 is according to the surging signal of sampling unit 22 collections, controllable switch unit 21 is in cut-off state, anti-surge unit 20 will insert in the input circuit of Switching Power Supply 1, thereby impedance increases, and surge current has also obtained inhibition.When surge current is reduced to rated operational current, the voltage at the output GND_1 place of filter rectifier 11 will go up, then control drive unit 23 is according to the surging signal of sampling unit 22 collections, control switch unit 21 is in conducting state, anti-surge unit 20 will separate with the input circuit of Switching Power Supply 1, thereby impedance reduces, and can improve power supply conversion efficiency.
The surge control circuit is prevented in the lightning protection of present embodiment self adaptation; change in voltage by detection filter rectification circuit 11 outputs; and adjust the input impedance of Switching Power Supply 1 according to this change in voltage; thereby can be when the surge phenomenon occurring the size of limit inrush currents; the safety and the life-span of elements such as protection power device, improve power-efficient.
Fig. 2 is the electrical block diagram of sampling unit and control drive unit one embodiment in the anti-surge control circuit of the utility model self adaptation lightning protection.
When the voltage of the output GND_1 of filter rectifier 11 is less than or equal to the reference voltage that reference power source V1 provides, comparator U1 output low level then, driving the second switch pipe Q2 and the first switching tube Q1 ends, therefore driving power VCC can't produce driving voltage through the first switching tube Q1, switch element 21 will be in cut-off state, thereby can will prevent that surge unit 20 inserts the input circuit of Switching Power Supply 1, disappears until it with limit inrush currents; When reference voltage that the voltage of the output GND_1 of filter rectifier 11 provides greater than reference power source V1, then comparator U1 exports high level, drive the second switch pipe Q2 and the first switching tube Q1 conducting, therefore driving power VCC then can produce driving voltage through the first switching tube Q1, driving switch unit 21 is in conducting state, thereby can will prevent that the input circuit of surge unit 20 with Switching Power Supply 1 separates, Switching Power Supply 1 is recovered operate as normal.
Above-mentioned sampling unit 22 also comprises voltage reference Verf, divider resistance R3, R6 and isolating diode D1.The GND-1 place of current rectifying and wave filtering circuit 11 is connected with sampling divider resistance R1, R2, and the end of sampling divider resistance R2 is connected with voltage reference Verf; The end of divider resistance R3 is connected with sampling divider resistance R1, and the other end is connected with the end of isolating diode D1; The other end of isolating diode D1 is connected with divider resistance R6 and control drive unit 23 respectively, and this isolating diode D1 constitutes buffer circuit; When isolating diode D1 forward conduction, divider resistance R3, R6 constitute the second divided voltage circuit.Voltage reference Verf is a constant positive voltage, and the GND-1 place is the negative voltage that floats, and sampling divider resistance R1, R2 carry out dividing potential drop to the voltage signal at Verf-GND_1 place; When surge current disappears, through divider resistance R3 to the input voltage of isolating diode D1 greater than zero, isolating diode D1 conducting; When surge current through out-of-date, through divider resistance R3 to the input voltage of isolating diode D1 less than zero, isolating diode D1 ends.Voltage reference can carry out level conversion to surging signal in the present embodiment, thereby the voltage of feasible process isolating diode D1 is the changing value between 0 to Verf, to satisfy comparator U1 input voltage greater than zero requirement.
In addition, above-mentioned control drive unit 23 can also comprise emitter follower U2, is connected between isolating diode D1 and the comparator U1, and the in-phase input end of this emitter follower U2 is connected with isolating diode D1 by resistance R 4; The inverting input of emitter follower U2 is connected with the output of emitter follower U2 by resistance R 5, and the output of this emitter follower U2 is connected with the input of comparator U1.This emitter follower U2 plays buffer action, avoids the influence of late-class circuit to front stage circuits.Also be connected with resistance R 7, R8 between the base stage of above-mentioned comparator U1 and second switch pipe Q2, also be connected with resistance R 9 between the collector electrode of second switch pipe Q2 and the base stage of the first switching tube Q1, also be connected with between the emitter of the first switching tube Q1 and the base stage between the collector electrode of resistance R 10, the first switching tube Q1 and the switch element 21 and also be connected with resistance R 11.Resistance R 7, R8 are the driving divider resistances of second switch pipe Q2; Resistance R 9, R10 are the driving resistor of the first switching tube Q1; R11 is the driving resistor of switch element 21.
In the present embodiment, anti-surge unit 20 is preferably resistance device, also can be other anti-surge devices.Switch element 21 is preferably field effect transistor MOSFET, also can be relay.When switch element 21 was relay, the drive signal that control drive unit 23 produces was and power converting circuit 12 drive signal altogether to be connected with the driving winding of relay.
Fig. 3 is the structural representation of anti-another embodiment of surge control circuit of the utility model self adaptation lightning protection.
On the basis of the foregoing description; when switch element 21 is field effect transistor MOSFET; the anti-surge control circuit of present embodiment self adaptation lightning protection also comprises driving protected location 24; this drives protected location 24 and is connected with control drive unit 23 and filter rectifier 11 respectively; according to the output voltage of filter rectifier 11, regulate the driving voltage that control drive unit 23 produces.
With reference to Fig. 4, above-mentioned driving protected location 24 comprises triode Q3 and TVS diode VAR1, the base stage of triode Q3 is connected with control drive unit 23, and collector electrode is connected with filter rectifier 11, and emitter is connected with control drive unit 23 and switch element 21 respectively; Described TVS diode VAR1 is connected with collector electrode with the emitter of triode Q3 respectively.
When the output GND_1 of filter rectifier 11 changes fast, TVS diode VAR1 can be clamped in safe range with the driving voltage of switch element 21, and when control drive unit 23 generations make switch element 21 be in the drive signal of cut-off state, triode Q3 can accelerate the transmission of this drive signal, makes switch element 21 accelerate to turn-off.
The above only is a preferred embodiment of the present utility model; be not so limit its claim; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (8)
1. the surge control circuit is prevented in a self adaptation lightning protection, be applied in the Switching Power Supply, this Switching Power Supply comprises the ac-input power supply that connects successively, filter rectifier and power converting circuit, it is characterized in that, comprise anti-surge unit, switch element, sampling unit and control drive unit; Wherein, described anti-surge unit is connected between described filter rectifier and the power converting circuit; Described switch element is in parallel with anti-surge unit, the input impedance of by-pass cock power supply; Described sampling unit is connected with filter rectifier, gathers the surging signal of filter rectifier; Described control drive unit is connected with sampling unit, according to described surging signal, produces drive control signal, controls the conducting of described switch element or ends.
2. the surge control circuit is prevented in self adaptation lightning protection according to claim 1, it is characterized in that, described sampling unit comprises that the conduction impedance with switch element is a sampling resistor, is connected with described filter rectifier, gathers the surging signal of filter rectifier.
3. the surge control circuit is prevented in self adaptation lightning protection according to claim 2, it is characterized in that described sampling unit also comprises voltage reference, reaches the bleeder circuit and the buffer circuit that are connected successively with voltage reference; Voltage reference is connected with sampling resistor, and the negative voltage surging signal that sampling resistor is collected carries out level conversion, and the surging signal of process level conversion is to the voltage signal that changes reference voltage from zero.
4. the surge control circuit is prevented in self adaptation lightning protection according to claim 3, it is characterized in that described control drive unit comprises control circuit and drive circuit; Wherein control circuit comprises reference power source and comparator, the input of described comparator is connected with reference power source and described buffer circuit respectively, the reference signal of surging signal and reference power source generation is compared, the output control signal, control drive unit produces driving voltage; Described drive circuit comprises driving power, first switching tube and second switch pipe, the base stage of described second switch pipe is connected with the output of described comparator, grounded emitter, collector electrode is connected with the base stage of described first switching tube, the emitter of described first switching tube is connected with driving power, and collector electrode is connected with described switch element.
5. the surge control circuit is prevented in self adaptation lightning protection according to claim 4, it is characterized in that described control circuit also comprises emitter follower, and described emitter follower is connected between buffer circuit and the comparator.
6. according to the anti-surge control circuit of each described self adaptation lightning protection in the claim 1 to 5, it is characterized in that described switch element is field effect transistor or relay.
7. the surge control circuit is prevented in self adaptation lightning protection according to claim 6; it is characterized in that; when switch element is field effect transistor; also comprise the driving protected location; be connected between control drive unit and the switch element; and also be connected,, regulate the driving voltage that control drive unit produces according to the output voltage of filter rectifier with filter rectifier.
8. the surge control circuit is prevented in self adaptation lightning protection according to claim 7, it is characterized in that, described driving protected location comprises triode and TVS diode, the base stage of described triode is connected with control drive unit, collector electrode is connected with filter rectifier, and emitter is connected with control drive unit and switch element respectively; Described TVS diode is connected with collector electrode with the emitter of triode respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200336283U CN202076780U (en) | 2011-01-30 | 2011-01-30 | Self-adapting anti-lightning anti-surging control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200336283U CN202076780U (en) | 2011-01-30 | 2011-01-30 | Self-adapting anti-lightning anti-surging control circuit |
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| Publication Number | Publication Date |
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| CN202076780U true CN202076780U (en) | 2011-12-14 |
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| CN2011200336283U Expired - Lifetime CN202076780U (en) | 2011-01-30 | 2011-01-30 | Self-adapting anti-lightning anti-surging control circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623962A (en) * | 2011-01-30 | 2012-08-01 | 深圳市航嘉驰源电气股份有限公司 | Adaptive lightning-protection surge-protection control circuit |
| CN103219879A (en) * | 2013-03-27 | 2013-07-24 | 苏州佳世达光电有限公司 | Power supply circuit with surge suppression function |
| WO2013149575A1 (en) * | 2012-04-01 | 2013-10-10 | 华为终端有限公司 | Lightning protection circuit, switching power supply and lightning protection method |
| CN106786432A (en) * | 2017-01-18 | 2017-05-31 | 中国科学院电子学研究所 | A kind of electronic equipment switching device and method |
| CN106936123A (en) * | 2017-03-24 | 2017-07-07 | 华为技术有限公司 | The protection device and uninterrupted power source of a kind of power supply unit |
| CN107664742A (en) * | 2016-07-28 | 2018-02-06 | 英飞凌科技股份有限公司 | For increasing method, system and equipment of the device to the robustness of over-voltage transients |
| CN110228393A (en) * | 2019-05-22 | 2019-09-13 | 重庆国翰能源发展有限公司 | A kind of alternating-current charging pile control system |
| CN118074080A (en) * | 2024-04-25 | 2024-05-24 | 深圳市华浩德电子有限公司 | Surge current resistant wire-wound resistor continuous startup and shutdown impact protection circuit |
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2011
- 2011-01-30 CN CN2011200336283U patent/CN202076780U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623962B (en) * | 2011-01-30 | 2015-03-25 | 深圳市航嘉驰源电气股份有限公司 | Adaptive lightning-protection surge-protection control circuit |
| CN102623962A (en) * | 2011-01-30 | 2012-08-01 | 深圳市航嘉驰源电气股份有限公司 | Adaptive lightning-protection surge-protection control circuit |
| US9391445B2 (en) | 2012-04-01 | 2016-07-12 | Huawei Device Co., Ltd. | Surge protection circuit, switching power supply, and surge protection method |
| CN103368164A (en) * | 2012-04-01 | 2013-10-23 | 华为终端有限公司 | Anti-lightning circuit, switching power supply and anti-lightning method |
| WO2013149575A1 (en) * | 2012-04-01 | 2013-10-10 | 华为终端有限公司 | Lightning protection circuit, switching power supply and lightning protection method |
| CN103368164B (en) * | 2012-04-01 | 2016-08-17 | 华为终端有限公司 | A kind of lightning protection circuit, Switching Power Supply and lightening arresting method |
| CN103219879B (en) * | 2013-03-27 | 2015-09-02 | 苏州佳世达光电有限公司 | A kind of power supply circuits with surging inhibit feature |
| CN103219879A (en) * | 2013-03-27 | 2013-07-24 | 苏州佳世达光电有限公司 | Power supply circuit with surge suppression function |
| CN107664742A (en) * | 2016-07-28 | 2018-02-06 | 英飞凌科技股份有限公司 | For increasing method, system and equipment of the device to the robustness of over-voltage transients |
| CN107664742B (en) * | 2016-07-28 | 2020-08-18 | 英飞凌科技股份有限公司 | Method, system and apparatus for increasing device robustness to overvoltage transients |
| CN106786432A (en) * | 2017-01-18 | 2017-05-31 | 中国科学院电子学研究所 | A kind of electronic equipment switching device and method |
| CN106936123A (en) * | 2017-03-24 | 2017-07-07 | 华为技术有限公司 | The protection device and uninterrupted power source of a kind of power supply unit |
| CN110228393A (en) * | 2019-05-22 | 2019-09-13 | 重庆国翰能源发展有限公司 | A kind of alternating-current charging pile control system |
| CN118074080A (en) * | 2024-04-25 | 2024-05-24 | 深圳市华浩德电子有限公司 | Surge current resistant wire-wound resistor continuous startup and shutdown impact protection circuit |
| CN118074080B (en) * | 2024-04-25 | 2024-07-23 | 深圳市华浩德电子有限公司 | Surge current resistant winding resistor continuous startup and shutdown surge protection circuit |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20111214 Effective date of abandoning: 20150325 |
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| RGAV | Abandon patent right to avoid regrant |