CN103001201A - Method and device for suppressing high-energy surge - Google Patents
Method and device for suppressing high-energy surge Download PDFInfo
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- CN103001201A CN103001201A CN201110269938XA CN201110269938A CN103001201A CN 103001201 A CN103001201 A CN 103001201A CN 201110269938X A CN201110269938X A CN 201110269938XA CN 201110269938 A CN201110269938 A CN 201110269938A CN 103001201 A CN103001201 A CN 103001201A
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- energy
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- piezo
- surge
- protective circuit
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Abstract
The invention discloses a method and a device for suppressing high-energy surge. The method is used for absorbing surge energy and includes steps of parallelly connecting multiple piezoresistors between a power source and electronic equipment, wherein the piezoresistors have the same parameters, and the quantity of the piezoresistors is determined according to the ratio of the surge energy to the energy absorbed by the single piezoresistor. The device is connected between the power source and the electronic equipment and comprises a primary protecting circuit, the primary protecting circuit comprises multiple piezoresistors connected in parallel and having the same parameters, and the quantity of the piezoresistors is determined according to the ratio of the surge energy to the energy absorbed by the single piezoresistor. The multiple piezoresistors connected in parallel are used for absorbing high-energy surge, so that the electronic equipment can be protected effectively when high-energy surge invades, and complicated earthing operation required in the mode of utilizing gas discharge tubes is avoided.
Description
Technical field
The present invention relates to anti-surge technical field, particularly a kind of high-energy surge inhibition method and device that need not to carry out complicated ground connection operation.
Background technology
Surge is a kind of of short duration curtage fluctuation that occurs in the circuit, usually continues about microsecond in circuit, and the high-energy surge is very large to the harm of electronic equipment when occuring.
The safeguard of the high-energy surge of prior art mainly adopts switch element, such as gas discharge tube.During the electronic equipment normal operation, gas discharge tube is in high-impedance state, disconnects; When the high-energy surge came, the gas discharge tube conducting with the surge current the earth of releasing, thereby had protected electronic equipment to avoid the surge impact failure.Gas discharge tube is widely used in the outdoor and industrial surge protection at present, is that present large-current electric gushes scheme the most general in the protection.Yet gas discharge tube is very high to the requirement of ground connection, requires the workmen very familiar to earth work, and it is large that difficulty is implemented in installation.
Another kind of widely used anti-surge device is piezo-resistance, wherein mainly uses Zinc-oxide piezoresistor.Zinc-oxide piezoresistor have the reaction time fast, low-leakage current, superior voltage ratio, broad voltage and energy Ratios, hang down non-firm power and without characteristics such as follow-up electric currents.Zinc-oxide piezoresistor is that a kind of voltage-current characteristic is nonlinear voltage sensitive element; piezo-resistance is not when working, and relatively shielded electronic equipment has very high impedance; be generally several megohms; can not affect the electrical characteristics of protected circuit, but when moment surge voltage occur, as when crossing the protection voltage of piezo-resistance; the impedance meeting step-down of this piezo-resistance; several ohms are only arranged, cause short circuit, therefore electronic product or element are protected.But because the level of single piezo-resistance absorption surge energy is limited, piezo-resistance mainly concentrates in the protection of low-voltage, little electric current in current anti-surge is used, and is then helpless for the protection of 380V industry and outdoor power consumption equipment.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of high-energy surge inhibition method and device, installation with the gas discharge tube that solves prior art is high to grounding requirement, install that to implement difficulty large, and single piezo-resistance can't be used for absorbing the problem of high-energy surge.
To achieve these goals, the invention provides a kind of high-energy surge inhibition method, be used for absorbing surge energy, a plurality of piezo-resistances are parallel between power supply and the electronic equipment, the parameter of each described piezo-resistance is identical, and the number of described piezo-resistance is determined according to the ratio of described surge energy and the absorbent energy of single described piezo-resistance.
As preferably, adopt a gas discharge tube in parallel with each described piezo-resistance as stand-by protection equipment.
The present invention provides a kind of high-energy surge suppressor simultaneously; be connected between power supply and the electronic equipment; be used for absorbing surge energy; comprise first order protective circuit; described first order protective circuit comprises the piezo-resistance of a plurality of parallel connections; the parameter of each described piezo-resistance is identical, and the number of described piezo-resistance is determined according to the ratio of described surge energy and the absorbent energy of single described piezo-resistance.
As preferably, described first order protective circuit also comprises the gas discharge tube in parallel with each described piezo-resistance.
As preferably, described first order protective circuit also comprises first electric capacity in parallel with each described piezo-resistance.
As preferred further, described first order protective circuit also comprises the gas discharge tube with each described piezo-resistance and the first Capacitance parallel connection.
As preferred further; also comprise second level protective circuit and inductance element; described first order protective circuit is connected to power end, and described second level protective circuit is connected to the electronic equipment end, and described inductance element is connected between described first order protective circuit and the second level protective circuit.
As preferred further, described second level protective circuit comprises the piezo-resistance of a plurality of parallel connections.
As preferred further, the number of the piezo-resistance of described second level protective circuit and the piezo-resistance of first order protective circuit is identical or different.
As preferred further, described second level protective circuit also comprises second electric capacity in parallel with each described piezo-resistance.
Compared with prior art, the present invention has following beneficial effect: surge absorbs the piezo-resistance by adopting a plurality of parallel connections to high-energy simultaneously, when the high-energy surge is invaded, can effectively protect electronic equipment, the ground connection of complexity operation when having avoided simultaneously simple employing gas discharge tube; This device is connected in the circuit, can intercept surge fully to the harm of follow-up electronic equipment, plays effective protective effect.
Description of drawings
Fig. 1 is the circuit structure diagram of the embodiment one of high-energy surge suppressor of the present invention.
Fig. 2 is the circuit structure diagram of the embodiment two of high-energy surge suppressor of the present invention.
Fig. 3 is the circuit structure diagram of the embodiment three of high-energy surge suppressor of the present invention.
Fig. 4 is the circuit structure diagram of the embodiment four of high-energy surge suppressor of the present invention.
Fig. 5 is the circuit structure diagram of the embodiment five of high-energy surge suppressor of the present invention.
Fig. 6 is the circuit structure diagram of the embodiment six of high-energy surge suppressor of the present invention.
Fig. 7 is the circuit structure diagram of the embodiment seven of high-energy surge suppressor of the present invention.
Fig. 8 is the circuit structure diagram of the embodiment eight of high-energy surge suppressor of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
To shown in Figure 8, the high-energy surge suppressor that various embodiments of the present invention provide is connected between power supply and the electronic equipment such as Fig. 1, is used for absorbing surge energy, and its input IN is connected with power end, and its output OUT is connected with the electronic equipment end.
As shown in Figure 1, the high-energy surge suppressor that embodiment one provides comprises first order protective circuit, and first order protective circuit comprises the piezo-resistance VSR of a plurality of parallel connections
1, VSR
2VSR
n, piezo-resistance VSR
1, VSR
2VSR
nParameter identical, so the absorbable energy of each piezo-resistance is also identical; After the parameter of each piezo-resistance is determined, the number n of piezo-resistance determines according to the ratio of described surge energy and the absorbable energy of single described piezo-resistance, be specially: the number n ≈ surge energy of the piezo-resistance/absorbable energy of single piezo-resistance, wherein n is integer.
The high-energy surge suppressor that embodiment one provides adopts the piezo-resistance of a plurality of parallel connections simultaneously surge energy to be absorbed, thereby can be used in the high-octane surge of inhibition; In addition, adopt piezo-resistance that surge energy is absorbed, exempted the ground connection operation, thereby avoided traditional anti-surge equipment ground for the high-energy surge of releasing that inconvenient problem is installed.
As shown in Figure 2, the difference of the high-energy surge suppressor that provides of the high-energy surge suppressor that provides of embodiment two and embodiment one is: first order protective circuit also comprises first capacitor C in parallel with each piezo-resistance
1, the first capacitor C
1The surge noise that is used for the filtering high frequency.
As shown in Figure 3; the high-energy surge suppressor that embodiment three provides is with the difference of the high-energy surge suppressor that embodiment one provides: first order protective circuit also comprises the gas discharge tube GDT in parallel with each piezo-resistance, when electric current surpasses piezo-resistance VSR
1, VSR
2VSR
nAbsorbability the time, gas discharge tube GDT plays a role as stand-by protection equipment, plays better anti-surge effect.
As shown in Figure 4, the difference of the high-energy surge suppressor that provides of the high-energy surge suppressor that provides of embodiment four and embodiment one is: first order protective circuit also comprises first capacitor C in parallel with each piezo-resistance
1With gas discharge tube GDT, the first capacitor C
1Be used for the surge noise of filtering high frequency, gas discharge tube GDT plays a role as stand-by protection equipment, plays better anti-surge effect.
As shown in Figure 5, the high-energy surge suppressor that provides of embodiment five comprises first order protective circuit, second level protective circuit and inductance element; Second level protective circuit is in parallel with first order protective circuit, can carry out moment to the surge voltage of input IN and release; Inductance element is serially connected with between first order protective circuit and the second level protective circuit, and the surge voltage that can suppress first order protective circuit flows into second level protective circuit, thereby prevents that surge voltage is to the damage of the electronic component in the electronic equipment; Wherein, the structure of any one first order protective circuit that provides among the embodiment one to embodiment four can be provided first order protective circuit; the structure of the first order protective circuit that provides among the embodiment two is provided in the present embodiment, and it comprises the piezo-resistance VSR of a plurality of parallel connections
1VSR
nAnd first capacitor C in parallel with each piezo-resistance
1, the first capacitor C
1The surge noise that is used for the filtering high frequency; Second level protective circuit comprises the piezo-resistance VSR of a plurality of parallel connections
1' ... VSR
n' and the second capacitor C
2, the number of the piezo-resistance in the number of its piezo-resistance and the first order protective circuit is identical, the second capacitor C
2The surge noise that also is used for the filtering high frequency; Inductance element comprises two inductance L
1And L
2, when the voltage of input IN is in normal condition, inductance L
1And L
2Be approximately the very low resistance of resistance, can not affect the normal operation of electronic equipment, as input IN during because of the surge voltage that the instantaneous plug of lightning fire switch occurs and produce, inductance L
1And L
2Produce inverse electromotive force, suppress surge voltage and transmit from first order protective circuit to second level protective circuit.
As shown in Figure 6; the high-energy surge suppressor that embodiment six provides is from the difference of the high-energy surge suppressor that embodiment five provides: the number of the piezo-resistance in the number of the piezo-resistance in its second level protective circuit and its first order protective circuit is different, is respectively piezo-resistance VSR
1' ... VSR
m'.
As shown in Figure 7; the high-energy surge suppressor that embodiment seven provides is with the difference of the high-energy surge suppressor that embodiment five provides: its first order protective circuit also comprises the gas discharge tube in parallel with each piezo-resistance and the first capacitor C 1, when electric current surpasses piezo-resistance VSR
1VSR
nAbsorbability the time, gas discharge tube GDT plays a role as stand-by protection equipment, plays better anti-surge effect.
As shown in Figure 8; the high-energy surge suppressor that embodiment eight provides is with the difference of the high-energy surge suppressor that embodiment six provides: its first order protective circuit also comprises the gas discharge tube in parallel with each piezo-resistance and the first capacitor C 1, when electric current surpasses piezo-resistance VSR
1VSR
nAbsorbability the time, gas discharge tube GDT plays a role as stand-by protection equipment, plays better anti-surge effect.
High-energy surge inhibition method provided by the invention, be used for absorbing surge energy, be specially: a plurality of piezo-resistances are parallel between power supply and the electronic equipment, the parameter of each described piezo-resistance is identical, and the number of described piezo-resistance is determined according to the ratio of described surge energy and the absorbent energy of single described piezo-resistance.
After the parameter of each piezo-resistance is determined, the number n of piezo-resistance determines according to the ratio of described surge energy and the absorbable energy of single described piezo-resistance, be specially: the number n ≈ surge energy of the piezo-resistance/absorbable energy of single piezo-resistance, wherein n is integer.
In addition; can also adopt a gas discharge tube in parallel with each described piezo-resistance as stand-by protection equipment; when electric current surpassed the absorbability of each piezo-resistance in parallel, gas discharge tube played a role as stand-by protection equipment, played better anti-surge effect.
Above embodiment is exemplary embodiment of the present invention only, is not used in restriction the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection range, this modification or be equal to replacement and also should be considered as dropping in protection scope of the present invention.
Claims (10)
1. high-energy surge inhibition method, be used for absorbing surge energy, it is characterized in that, a plurality of piezo-resistances are parallel between power supply and the electronic equipment, the parameter of each described piezo-resistance is identical, and the number of described piezo-resistance is determined according to the ratio of described surge energy and the absorbent energy of single described piezo-resistance.
2. high-energy surge inhibition method according to claim 1 is characterized in that, adopts a gas discharge tube in parallel with each described piezo-resistance as stand-by protection equipment.
3. high-energy surge suppressor; be connected between power supply and the electronic equipment; be used for absorbing surge energy; it is characterized in that; comprise first order protective circuit; described first order protective circuit comprises the piezo-resistance of a plurality of parallel connections, and the parameter of each described piezo-resistance is identical, and the number of described piezo-resistance is determined according to the ratio of described surge energy and the absorbent energy of single described piezo-resistance.
4. high-energy surge suppressor according to claim 3 is characterized in that, described first order protective circuit also comprises the gas discharge tube in parallel with each described piezo-resistance.
5. high-energy surge suppressor according to claim 3 is characterized in that, described first order protective circuit also comprises first electric capacity in parallel with each described piezo-resistance.
6. high-energy surge suppressor according to claim 5 is characterized in that, described first order protective circuit also comprises the gas discharge tube with each described piezo-resistance and the first Capacitance parallel connection.
7. according to claim 3 to one of 6 described high-energy surge suppressors; it is characterized in that; also comprise second level protective circuit and inductance element; described first order protective circuit is connected to power end; described second level protective circuit is connected to the electronic equipment end, and described inductance element is connected between described first order protective circuit and the second level protective circuit.
8. high-energy surge suppressor according to claim 7 is characterized in that, described second level protective circuit comprises the piezo-resistance of a plurality of parallel connections.
9. high-energy surge suppressor according to claim 8 is characterized in that, the number of the piezo-resistance of described second level protective circuit and the piezo-resistance of first order protective circuit is identical or different.
10. high-energy surge suppressor according to claim 8 is characterized in that, described second level protective circuit also comprises second electric capacity in parallel with each described piezo-resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110269938XA CN103001201A (en) | 2011-09-13 | 2011-09-13 | Method and device for suppressing high-energy surge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110269938XA CN103001201A (en) | 2011-09-13 | 2011-09-13 | Method and device for suppressing high-energy surge |
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| Publication Number | Publication Date |
|---|---|
| CN103001201A true CN103001201A (en) | 2013-03-27 |
Family
ID=47929474
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110269938XA Pending CN103001201A (en) | 2011-09-13 | 2011-09-13 | Method and device for suppressing high-energy surge |
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| CN (1) | CN103001201A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294077A (en) * | 2017-07-26 | 2017-10-24 | 四川中光防雷科技股份有限公司 | A kind of surge device protector and its circuit |
| CN109149540A (en) * | 2018-08-29 | 2019-01-04 | 出门问问信息科技有限公司 | A kind of esd protection circuit and electronic equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4347539A (en) * | 1981-06-03 | 1982-08-31 | Westinghouse Electric Corp. | Electrical equipment protective apparatus with energy balancing among parallel varistors |
| US5392188A (en) * | 1991-02-15 | 1995-02-21 | Epstein; Barry M. | Power surge transient voltage protection and filtering circuit having current controlling characteristics |
| CN2511032Y (en) * | 2001-10-15 | 2002-09-11 | 海信集团有限公司 | Domestic-appliance lightning-stroke-proof apparatus of mainly preventing from inductive lightning |
| CN2569411Y (en) * | 2002-08-14 | 2003-08-27 | 李锦添 | Lightning protector |
| CN2681423Y (en) * | 2003-12-17 | 2005-02-23 | 华为技术有限公司 | Lightning protection device |
| CN2689416Y (en) * | 2004-03-22 | 2005-03-30 | 西安市西无二电子信息集团有限公司 | Lightening-proof over voltage protector for telephone line interface end in telephone communicating system |
| CN201018277Y (en) * | 2007-02-01 | 2008-02-06 | 株洲普天中普防雷科技有限公司 | Three-in-one lightning protection device dedicated for video monitoring system |
| CN201509073U (en) * | 2009-08-18 | 2010-06-16 | 中兴通讯股份有限公司 | Direct current supply two-grade lightning protection device used for base station |
-
2011
- 2011-09-13 CN CN201110269938XA patent/CN103001201A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4347539A (en) * | 1981-06-03 | 1982-08-31 | Westinghouse Electric Corp. | Electrical equipment protective apparatus with energy balancing among parallel varistors |
| US5392188A (en) * | 1991-02-15 | 1995-02-21 | Epstein; Barry M. | Power surge transient voltage protection and filtering circuit having current controlling characteristics |
| CN2511032Y (en) * | 2001-10-15 | 2002-09-11 | 海信集团有限公司 | Domestic-appliance lightning-stroke-proof apparatus of mainly preventing from inductive lightning |
| CN2569411Y (en) * | 2002-08-14 | 2003-08-27 | 李锦添 | Lightning protector |
| CN2681423Y (en) * | 2003-12-17 | 2005-02-23 | 华为技术有限公司 | Lightning protection device |
| CN2689416Y (en) * | 2004-03-22 | 2005-03-30 | 西安市西无二电子信息集团有限公司 | Lightening-proof over voltage protector for telephone line interface end in telephone communicating system |
| CN201018277Y (en) * | 2007-02-01 | 2008-02-06 | 株洲普天中普防雷科技有限公司 | Three-in-one lightning protection device dedicated for video monitoring system |
| CN201509073U (en) * | 2009-08-18 | 2010-06-16 | 中兴通讯股份有限公司 | Direct current supply two-grade lightning protection device used for base station |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294077A (en) * | 2017-07-26 | 2017-10-24 | 四川中光防雷科技股份有限公司 | A kind of surge device protector and its circuit |
| CN109149540A (en) * | 2018-08-29 | 2019-01-04 | 出门问问信息科技有限公司 | A kind of esd protection circuit and electronic equipment |
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Application publication date: 20130327 |