CN103311916A - Thunder-prevention overvoltage protection device - Google Patents
Thunder-prevention overvoltage protection device Download PDFInfo
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- CN103311916A CN103311916A CN2013102684487A CN201310268448A CN103311916A CN 103311916 A CN103311916 A CN 103311916A CN 2013102684487 A CN2013102684487 A CN 2013102684487A CN 201310268448 A CN201310268448 A CN 201310268448A CN 103311916 A CN103311916 A CN 103311916A
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Abstract
The invention discloses a thunder-prevention overvoltage protection device. The thunder-prevention overvoltage protection device comprises a piezoresistor sheet, a positive temperature coefficient thermistor sheet and a gas discharge tube, wherein the piezoresistor sheet and the positive temperature coefficient thermistor sheet are encapsulated integrally to form an encapsulation body. One end of the positive temperature coefficient thermistor sheet is a first leading-out end. The other end of the positive temperature coefficient thermistor sheet is connected with one end of the piezoresistor sheet to form a public end, and the public end serves as a third leading-out end. The other end of the piezoresistor sheet serves as a second leading-out end. The gas discharge tube is located outside the encapsulation body, and two ends of the gas discharge tube are connected with the first leading-out end and the third leading-out end respectively. The thunder-prevention overvoltage protection device can inhabit operation overvoltage and fault power frequency overvoltage and can play a protecting role of a normal voltage-sensitive element when lightning stroke pulse overvoltage occurs.
Description
Technical field
The present invention relates to the lightning protection over-voltage protection technology, particularly a kind of compound lightning protection over-voltage protector.
Background technology
The ZnO pressure cell is used for power electronic circuits in a large number, the power-frequency overvoltage that the overvoltage that the absorption lightening pulse causes and system's operation and the system failure cause.But; pressure cell itself absorbs surge energy certain limit; the pressure cell that is connected in parallel on the electric power loop absorbs overvoltage energy (particularly long-term power-frequency overvoltage) simultaneously; self temperature raises; when the energy of piezo-resistance absorption is excessive; piezo-resistance may be blasted on fire; generally solve this problem by pressure sensitive voltage and the diameter that improves piezo-resistance now; but so just reduced to a certain extent the protection effect of varistor absorption surge voltage; the pulse residual voltage must raise, nor can prevent the piezo-resistance accident on fire of blasting at all.
Positive temperature coefficient (PTC) thermistor is connected on the electronic product power source loop, can play overcurrent protection.Positive temperature coefficient (PTC) thermistor and piezo-resistance combination can be played comprehensive over-current over-voltage protection effect.
Existing document: " Lu Zhenya, the Combination application of varistor and PTCR thermistor, electronic component and material, 1997.12 " have openly reported some result of the tests of varistor and PTC themistor Combination application.
Utility model patent 200720049371.4 and 201220290529.8 discloses a kind of composite positive temperature coefficient thermistor, be made into three ends by PTC thermistor and piezo-resistance are packaged together and draw device, the PTC temperature-sensitive element is connected with protected circuit during application, pressure cell is in parallel with protected circuit, electric current and temperature (thermal coupling effect) when utilizing piezo-resistance overvoltage response improve the protection speed of PTC thermistor, and protect conversely piezo-resistance; When utilizing PTC thermistor and piezo-resistance thermal coupling, the integrated protection effect of current/voltage improves the protection speed of PTC thermistor to greatest extent.
But, because the PTC temperature-sensitive element has certain resistance, can only bear less electric current and flow through, protected circuit rated operational current can only be limited in the element non-operating current, and this has just limited the range of application that above-mentioned existing three ends are drawn assembling device.
The gap (general air gap or gas discharge tube) of also can connecting when adopting the ZnO pressure cell as the overvoltage lightning protection, a similar band gap electric lightning.Use with gap series; can prevent ZnO pressure cell ageing failure; but can improve the puncture starting voltage of circuit; when switching overvoltage (power-frequency overvoltage) amplitude does not reach puncture voltage (ZnO element puncture voltage and gap breakdown voltage sum); element does not have electric current to flow through, and can not shield to circuit.
In sum, in order to reduce pressure cell power frequency overvoltage deflagration accident having probability, can improve the pressure sensitive voltage of pressure cell, but must improve the pulse residual voltage like this, the probability that protected circuit is operated overvoltage and fault power-frequency overvoltage destruction increases greatly; Adopt the three terminal device of PTC temperature-sensitive element and ZnO pressure cell combination can reduce pressure cell power frequency overvoltage deflagration accident having probability, can realize lower pulse residual voltage simultaneously, but the rated operational current of protected circuit is restricted; Adopt ZnO pressure cell and gap series to use, can prevent the aging deflagration accident having that causes of pressure cell long-term load, but circuit operation overvoltage and fault power-frequency overvoltage protective capability are reduced.
Summary of the invention
For the above-mentioned shortcoming and deficiency that overcomes prior art; the object of the present invention is to provide a kind of lightning protection over-voltage protector; not only can suppress switching overvoltage and fault power-frequency overvoltage, when the lightning strikes pulse surge, can the bring into normal play protective effect of pressure cell of this protection assembly.
Purpose of the present invention is achieved through the following technical solutions:
The lightning protection over-voltage protector, comprise piezoresistive wafer, semistor sheet and gas discharge tube, described piezo-resistance and semistor sheet are packaged as a whole, and form packaging body, and an end of described semistor sheet is the first exit; The other end of semistor sheet is connected with an end of piezoresistive wafer, forms common port, and described common port is as three terminal; The other end of piezoresistive wafer is as the second exit; Gas discharge tube is positioned at outside the packaging body, and the two ends of gas discharge tube connect respectively the first exit and three terminal; Connect with piezoresistive wafer after described semistor sheet and the gas discharge tube parallel connection; Described semistor sheet and piezoresistive wafer form the thermal coupling relation.
An electrode welding lead-in wire of described semistor sheet is as the first exit; An electrode of the another side electrode of ceramic positive temperature coefficient thermistor sheet and piezoresistive wafer welds together by scolding tin, forms common port, simultaneously as three terminal; The another side electrode welding lead-in wire of piezoresistive wafer is the second exit; After semistor sheet, the piezoresistive wafer encapsulation, form the packaging body with three exits; Between the first exit and three terminal, connect gas discharge tube.
Described being encapsulated as adopted the encapsulation of anti-flammability organic resin material.
Described piezoresistive wafer is zinc oxide varistor.
Compared with prior art, the present invention has the following advantages and beneficial effect:
The present invention in use the first exit and the second exit is connected in parallel on the protected power circuit; not only can suppress switching overvoltage and fault power-frequency overvoltage; when the lightning strikes pulse surge, can the bring into normal play protective effect of pressure cell of this protection assembly:
(1) when supply voltage is normal, lightning protection over-voltage protector of the present invention does not have electric current (or the fine leak electric current is only arranged) to flow through, and protected Circuits System normal operation is unaffected.
(2) when thunderbolt causes protected Circuits System pulse surge; lightning protection over-voltage protector action of the present invention; pulse current is through the series loop of pressure cell and gas discharge tube, and the pulse surge that protected circuit bears is controlled within the pulse residual voltage of pressure cell and gas discharge tube series loop (being pulse residual voltage and the gas discharge tube conducting residual voltage sum of pressure cell).
(3) if the piezo-resistance long-term load so that performance degradation, the lower leakage current increase of normal voltage load causes temperature to raise, heat is delivered on the thermistor, reach the Curie temperature of thermistor when temperature, the thermistor action, the thermistor resistance sharply raises, and has limited the electric current of piezo-resistance, prevents the generation of piezo-resistance deflagration accident having.
(4) when power-frequency overvoltage appears in power circuit, the piezo-resistance conducting, On current flows through through thermistor, absorbs the overvoltage energy, and the voltage that protected Circuits System is born is limited within piezo-resistance and the thermistor series loop voltage drop.
Description of drawings
Fig. 1 is the overall schematic of the lightning protection over-voltage protector of embodiments of the invention.
Fig. 2 is the inner member connection diagram of the lightning protection over-voltage protector of inventive embodiment.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
The lightning protection over-voltage protector of the present embodiment comprises zinc oxide varistor 11, semistor sheet 12 and gas discharge tube 13.As shown in Figure 1, an electrode welding lead-in wire of semistor sheet 12 is exit 14; An electrode of the another side electrode of ceramic positive temperature coefficient thermistor sheet 12 and zinc oxide varistor 11 welds together by scolding tin, forms common port, simultaneously as exit 16; The another side electrode welding lead-in wire of zinc oxide varistor 11 is exit 15.Zinc oxide varistor 11, semistor sheet 12 form packaging body after sealing epoxy resin, solidifying; the gas discharge tube two ends are connected respectively exit 14 and exit 16; form the lightning protection over-voltage protector of the present embodiment, exit 14 and exit 15 are connected in parallel on the protected power circuit during use.
The inner member of the lightning protection over-voltage protector of the present embodiment connects as shown in Figure 2, connects dotted line frame 17 expression encapsulated layers among the figure behind semistor sheet 12 and the gas discharge tube in parallel 13 with zinc oxide varistor 11.
The Curie temperature of the semistor sheet of lightning protection over-voltage protector inside is chosen as (95～125 ℃), and the room temperature resistance is chosen as (10～300 ohm); The pressure sensitive voltage of piezoresistive wafer is chosen as (350～550V-be used for 220VAC power supply) or (170～270V-be used for 110VAC power supply); The pulse breakdown voltage of gas discharge tube is chosen as 450～650V.
Select diameter/thickness to be about 14.0/1.8mm, pressure sensitive voltage V
1mAThe voltage dependent resistor chip of=430V ± 10%; Select external diameter/internal diameter // thickness to be about 14.0/5.5/5.0mm; 30～50 ohm of room temperature (25 ℃) resistances; Curie temperature is 120 ℃ semistor chip; select diameter/highly to be 5/5mm; dc breakdown voltage is the gas discharge tube of 550～600V; 5 in the lightning protection over-voltage protector sample of making the present embodiment carries out power-frequency overvoltage and the test of simulation Lightning Over-voltage to sample.The power frequency test voltage is 660VAC(3 times of power frequency phase voltage), power supply maximum output current 10A; Assembled pulse wave producer (the port open voltage waveform is that 1.2/50 μ s, port short circuit current waveform are 8/20 μ s) is adopted in the test of simulation Lightning Over-voltage, the test voltage current peak is set to 6kV/3kA, every sample direct impulse is tested 10 times, interval 2 minutes, place after 10 minutes reverse impulse test 10 times, interval 2 minutes.In order to contrast, choosing specification is 20D821(pressure sensitive voltage V
1mA=750～800V, chip diameter 20mm) 5 of commercially available Zinc-oxide piezoresistors carry out identical test.Test result sees Table 1.
Find out from table 1 test result, the sample 660VAC power-frequency overvoltage performance of the present embodiment preparation is better than the varistor that specification is 20D821, during the pulse current test, the pulse residual voltage of the utility model sample is the pulse residual voltage of 20D821 varistor far below specification.
The sample of table 1, the present embodiment and comparative sample power-frequency overvoltage and pulse testing result
Above-described embodiment is the better execution mode of the present invention; but embodiments of the present invention are not limited by the examples; other any do not deviate from change, the modification done under Spirit Essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (4)
1. the lightning protection over-voltage protector is characterized in that, comprises piezoresistive wafer, semistor sheet and gas discharge tube, and described piezoresistive wafer and semistor sheet are packaged as a whole, and forms packaging body; One end of described semistor sheet is the first exit; The other end of semistor sheet is connected with an end of piezoresistive wafer, forms common port, and described common port is as three terminal; The other end of piezoresistive wafer is as the second exit; Gas discharge tube is positioned at outside the packaging body, and the two ends of gas discharge tube connect respectively the first exit and three terminal.
2. lightning protection over-voltage protector according to claim 1 is characterized in that, an electrode welding lead-in wire of described semistor sheet is as the first exit; An electrode of the another side electrode of ceramic positive temperature coefficient thermistor sheet and piezoresistive wafer welds together by scolding tin, forms common port, simultaneously as three terminal; The another side electrode welding lead-in wire of piezoresistive wafer is the second exit; After semistor sheet, the piezoresistive wafer encapsulation, form the packaging body with three exits; Between the first exit and three terminal, connect gas discharge tube.
3. lightning protection over-voltage protector according to claim 1 is characterized in that, described being encapsulated as adopted the encapsulation of anti-flammability organic resin material.
4. each described lightning protection over-voltage protector is characterized in that according to claim 1～3, and described piezoresistive wafer is zinc oxide varistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310268448.7A CN103311916B (en) | 2013-06-28 | 2013-06-28 | Thunder-prevention overvoltage protection device |
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| CN201310268448.7A CN103311916B (en) | 2013-06-28 | 2013-06-28 | Thunder-prevention overvoltage protection device |
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| CN103311916A true CN103311916A (en) | 2013-09-18 |
| CN103311916B CN103311916B (en) | 2016-09-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048212A (en) * | 2015-07-29 | 2015-11-11 | 林峰伟 | High-efficiency converter socket resistant to surge and lightning stroke |
| CN110596545A (en) * | 2019-09-04 | 2019-12-20 | 国网江苏省电力有限公司电力科学研究院 | Partial discharge detection device and detection method based on combined action of alternating current and impulse voltage |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997048159A1 (en) * | 1996-06-13 | 1997-12-18 | Abb Research Ltd. | Method of protecting a system or an installation from surge and voltage clamping circuit |
| CN201036096Y (en) * | 2007-03-19 | 2008-03-12 | 深圳市劲阳电子有限公司 | Composite type positive temperature coefficient thermal resistance |
| CN201383679Y (en) * | 2009-04-03 | 2010-01-13 | 成都顺康电子有限责任公司 | Low-capacitance combination solid discharge tube chip |
| CN201383397Y (en) * | 2009-04-03 | 2010-01-13 | 成都顺康电子有限责任公司 | Low-capacitance combination piezoresistor |
| WO2011102811A2 (en) * | 2010-02-19 | 2011-08-25 | ISKRA ZAŠČITE d.o.o. | Excess voltage circuit-breaker with a rotational disc and an electronic assembly to improve operation reliability |
| CN202662415U (en) * | 2012-06-19 | 2013-01-09 | 华南理工大学 | Composite type voltage and current protection assembly |
| CN103311914A (en) * | 2013-05-31 | 2013-09-18 | 深圳市劲阳电子有限公司 | Overvoltage production circuit of composite type piezoresistor |
| CN203434621U (en) * | 2013-06-28 | 2014-02-12 | 华南理工大学 | Lightning protection overvoltage protection device |
-
2013
- 2013-06-28 CN CN201310268448.7A patent/CN103311916B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997048159A1 (en) * | 1996-06-13 | 1997-12-18 | Abb Research Ltd. | Method of protecting a system or an installation from surge and voltage clamping circuit |
| CN201036096Y (en) * | 2007-03-19 | 2008-03-12 | 深圳市劲阳电子有限公司 | Composite type positive temperature coefficient thermal resistance |
| CN201383679Y (en) * | 2009-04-03 | 2010-01-13 | 成都顺康电子有限责任公司 | Low-capacitance combination solid discharge tube chip |
| CN201383397Y (en) * | 2009-04-03 | 2010-01-13 | 成都顺康电子有限责任公司 | Low-capacitance combination piezoresistor |
| WO2011102811A2 (en) * | 2010-02-19 | 2011-08-25 | ISKRA ZAŠČITE d.o.o. | Excess voltage circuit-breaker with a rotational disc and an electronic assembly to improve operation reliability |
| CN202662415U (en) * | 2012-06-19 | 2013-01-09 | 华南理工大学 | Composite type voltage and current protection assembly |
| CN103311914A (en) * | 2013-05-31 | 2013-09-18 | 深圳市劲阳电子有限公司 | Overvoltage production circuit of composite type piezoresistor |
| CN203434621U (en) * | 2013-06-28 | 2014-02-12 | 华南理工大学 | Lightning protection overvoltage protection device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048212A (en) * | 2015-07-29 | 2015-11-11 | 林峰伟 | High-efficiency converter socket resistant to surge and lightning stroke |
| CN110596545A (en) * | 2019-09-04 | 2019-12-20 | 国网江苏省电力有限公司电力科学研究院 | Partial discharge detection device and detection method based on combined action of alternating current and impulse voltage |
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| CN103311916B (en) | 2016-09-28 |
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Effective date of registration: 20171204 Address after: 510640 Tianhe District, Guangdong, No. five road, No. 381, Co-patentee after: Shenzhen Jinyang Electronic Co., Ltd. Patentee after: South China University of Technology Co-patentee after: Guangzhou Guan Electronics Co., Ltd. Address before: 510641 Tianhe District, Guangdong, No. five road, No. 381, Co-patentee before: Shenzhen Jinyang Electronic Co., Ltd. Patentee before: South China University of Technology Co-patentee before: Shenzhen Gu'an Electronics Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160928 Termination date: 20210628 |