CN103326344A - Overvoltage limiting circuit - Google Patents
Overvoltage limiting circuit Download PDFInfo
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- CN103326344A CN103326344A CN2013102772346A CN201310277234A CN103326344A CN 103326344 A CN103326344 A CN 103326344A CN 2013102772346 A CN2013102772346 A CN 2013102772346A CN 201310277234 A CN201310277234 A CN 201310277234A CN 103326344 A CN103326344 A CN 103326344A
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Abstract
The invention provides an overvoltage limiting circuit. According to the circuit, an electrical equipment power supply with the need of protection of is connected with diodes from D1 to D5, capacitors from C1 to C3, an electrolytic capacitor CD1, resistors from R1 to R9, a potentiometer RW, an operational amplifier IC1, and a field effect transistor or an electronic switching devices O1 such as an IGBT and a triode. The overvoltage limiting circuit in working can quickly suppress and absorb transient voltage and consume energy so as to protect the electrical equipment, specifically, the transient voltage can be rapidly and reliably suppressed, especially a high power transient voltage surge, and only little electrical energy is consumed under a set suppression voltage value. The overvoltage limiting circuit also has a good suppression effect on repetitive high voltage pulses and transient voltage with long duration.
Description
Technical field
The present invention relates to a kind of protective circuit, relate in particular to a kind of overvoltage limiting circuit.
Background technology
In existing power supply grid, often can there be various high-voltage pulses because of the access of a variety of causes such as thunder and lightning, other electric equipment.In addition, in the circuit of inverter power supply, sometimes also high-voltage pulse can appear.
The interference of various high-voltage pulses can make the power consumption equipment cisco unity malfunction, and it is to damaging power consumption equipment sometimes.In order to protect power consumption equipment safety, normally to work, usually in circuit, adopt the protective circuits such as gas discharge tube, piezo-resistance, transient voltage suppressor diode or capacitance-resistance series connection absorption to suppress this interference in the prior art.But the inhibition power of gas discharge tube, piezo-resistance, transient voltage suppressor diode is less, and repeatedly repeats to disturb easy damage gas discharge tube, piezo-resistance, transient voltage suppressor diode.In addition; there are a critical defect in gas discharge tube, piezo-resistance, transient voltage suppressor diode, have exactly negative resistance charactertistic, often can impact resistance decreasing of lower moment at high voltage pulse; can not be immediately recover high resistant at pressure limiting point, become the low-resistance load of power supply circuits and burnt out by large electric current.And capacitance-resistance series connection absorbing circuit exists the problem of the normal power source energy that consumes circuit, if when absorbing the transient voltage impact of relatively high power, it is very large that the consumption of this energy will become.
Therefore, how can be the inhibition transient voltage of fast and reliable, and suppress powerful transient voltage and impact, only consuming simultaneously very little electric energy under the inhibition magnitude of voltage becomes the problem of needing solution badly.
Summary of the invention
The object of the invention is to propose a kind of overvoltage limiting circuit, this circuit can function as follows: 1. the transient voltage inhibitory action of fast and reliable: 2. can suppress powerful transient voltage and impact: 3. set and suppress only to consume under the magnitude of voltage very little electric energy.
For reaching this purpose, the present invention by the following technical solutions:
A kind of overvoltage limiting circuit; comprise: binding post 220V1 (1) is connected 23 with the positive pole of diode D1 (3) with diode D2) negative pole be connected; the negative pole of the negative pole of diode D1 (3) and diode D3 (4); the positive pole of electrochemical capacitor CD1 (5); one end of capacitor C 1 (6); one end of resistance R 1 (7); one end of resistance R 6 (10) joins; binding post 220V2 (2) is connected 22 with the positive pole of diode D3 (4) with diode D4) negative pole be connected; the positive pole of the positive pole of diode D2 (23) and diode D4 (22); the negative pole of electrochemical capacitor CD1 (5); the other end of capacitor C 1 (6); the other end of capacitor C 2 (9); the other end of resistance R 2 (18); the other end of resistance R 5 (17); the other end of resistance R 7 (14); the other end of resistance R 9 (19) joins; and be connected to the negative pole VS of the first dc power supply; the negative pole of the other end of resistance R 1 (7) and diode D5 (21); the end of potentiometer RW (8) joins; the normal phase input end of one end of capacitor C 2 (9) and amplifier IC1 (11); the central slide end of potentiometer RW (8) joins; one end of the positive pole of diode D5 (21) and resistance R 8 (20); one end of resistance R 9 (19) joins; one end of the other end of potentiometer RW (8) and resistance R 2 (18) joins; one end of the negative-phase input of amplifier IC1 (11) and resistance R 3 (12); one end of capacitor C 3 (15); one end of resistance R 5 (17); one end of resistance R 4 (16) joins; the other end of resistance R 4 (16); the other end of resistance R 8 (20) and the anodal VC of the first dc power supply join; the other end of the output of amplifier IC1 (11) and resistance R 3 (12); the other end of capacitor C 3 (15); the grid of switching device O1 (13) joins; the drain electrode of the other end of resistance R 6 (10) and switching device O1 (13) is joined; one end of the source electrode of switching device O1 (13) and resistance R 7 (14) joins, and described binding post is the power supply that needs the electric equipment of protection.
Especially, described switching device O1 is field effect transistor, IGBT pipe or triode.
Especially, described amplifier IC1 is powered by the second dc power supply.
By above-mentioned overvoltage limiting circuit, inhibition transient voltage that can fast and reliable, particularly powerful transient voltage impacts, and suppresses only to consume under the magnitude of voltage very little electric energy and set.
Description of drawings
Fig. 1 is according to the circuit diagram of the overvoltage limiting circuit of the embodiment of the invention.
The technical characterictic that Reference numeral referred to respectively among the figure is:
1, binding post 220V1:2, binding post 220V2:3, diode D1:4, diode D3:5, electrochemical capacitor CD1:6, capacitor C 1:7, resistance R 1:8, potentiometer RW:9, capacitor C 2:10, resistance R 6:11, amplifier IC1:12, resistance R 3:13, switching device O1:14, resistance R 7:15, capacitor C 3:16, resistance R 4:17, resistance R 5:18, resistance R 2:19, resistance R 9:20, resistance R 8:21, diode D5:22, diode D4:23, diode D2.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.Be understandable that, specific embodiment described herein only is used for explaining the present invention, but not limitation of the invention.Also need to prove in addition, for convenience of description, only show part related to the present invention in the accompanying drawing but not entire infrastructure.
Referring to accompanying drawing 1, overvoltage limiting circuit is according to a particular embodiment of the invention disclosed.
Circuit of the present invention as shown in Figure 1; its structure is that binding post 220V1 (1) is connected 23 with the positive pole of diode D1 (3) with diode D2) negative pole be connected; the negative pole of the negative pole of diode D1 (3) and diode D3 (4); the positive pole of electrochemical capacitor CD1 (5); one end of capacitor C 1 (6); one end of resistance R 1 (7); one end of resistance R 6 (10) joins; binding post 220V2 (2) is connected 22 with the positive pole of diode D3 (4) with diode D4) negative pole be connected; the positive pole of the positive pole of diode D2 (23) and diode D4 (22); the negative pole of electrochemical capacitor CD1 (5); the other end of capacitor C 1 (6); the other end of capacitor C 2 (9); the other end of resistance R 2 (18); the other end of resistance R 5 (17); the other end of resistance R 7 (14); the other end of resistance R 9 (19) joins; and be connected to the negative pole VS of the first dc power supply; the negative pole of the other end of resistance R 1 (7) and diode D5 (21); the end of potentiometer RW (8) joins; the normal phase input end of one end of capacitor C 2 (9) and amplifier IC1 (11); the central slide end of potentiometer RW (8) joins; one end of the positive pole of diode D5 (21) and resistance R 8 (20); one end of resistance R 9 (19) joins; one end of the other end of potentiometer RW (8) and resistance R 2 (18) joins; one end of the negative-phase input of amplifier IC1 (11) and resistance R 3 (12); one end of capacitor C 3 (15); one end of resistance R 5 (17); one end of resistance R 4 (16) joins; the other end of resistance R 4 (16); the other end of resistance R 8 (20) and the anodal VC of the first dc power supply join; the other end of the output of amplifier IC1 (11) and resistance R 3 (12); the other end of capacitor C 3 (15); the grid of switching device O1 (13) joins; the drain electrode of the other end of resistance R 6 (10) and switching device O1 (13) is joined; one end of the source electrode of switching device O1 (13) and resistance R 7 (14) joins, and described binding post 220V1 and 220V2 are the power supply that needs the electric equipment of protection.
Amplifier IC1 can be powered by dc power supply, preferably, adopts the second dc power supply (not shown) that is different from the first dc power supply to power.
The operation principle of this circuit is as follows: diode D1 (3) in the circuit, D2 (23), D3 (4), D4 (22) forms full-wave rectifier, electrochemical capacitor CD1 (5), capacitor C 1 (6) forms transient voltage Absorption Capacitance, resistance R 1 (7), R2 (18), R3 (12), R4 (16), R5 (17), R6 (10), R7 (14), R8 (20), R9 (19), potentiometer RW (8), capacitor C 2 (9), amplifier IC1 (11), switching device O1 (13) and diode D5 (21) form rheostat transient voltage energy consumption device.Resistance R 8 (20), R9 (19), diode D5 (21) provide a start bias for amplifier IC1 (11), prevent the operation irregularity that amplifier IC1 (11) might occur when circuit start.
Full-wave rectifier accesses transient voltage Absorption Capacitance two ends with transient voltage, because the voltage at transient voltage Absorption Capacitance two ends can not suddenly change, so just clamped down on fast disturbing pulse, the voltage at transient voltage Absorption Capacitance two ends was increased to the restriction point when upper if transient voltage continue to rise, rheostat transient voltage energy consumption device will begin conducting, and the continuation of the voltage at restriction transient voltage Absorption Capacitance two ends raises.In use, can select according to actual needs the design parameter of each element in this overvoltage limiting circuit, so that the overvoltage limiting circuit has different high-power transient voltage absorptions.Like this, this circuit can be realized the transient voltage inhibitory action of fast and reliable, also can suppress powerful transient voltage and impact.
In addition, this overvoltage limiting circuit only needs circuit that the voltage of transient voltage Absorption Capacitance is charged to operating voltage in the connection process, only consumes later on circuit electric energy seldom.Can find out from the operation principle of this circuit, this circuit also has good inhibitory action for repeating high voltage pulse and long-term transient voltage.
And can find out from the work characteristics of this circuit, this circuit is for the disturbing pulse unrestraint effect under the disturbing pulse that is lower than the normal power supply voltage peak or the restriction point, namely under the effect of little disturbing pulse (being no more than in the situation of limit value), only clamped down on by Absorption Capacitance, the transient voltage energy consumption device does not put into operation, and this also is another characteristics of energy saving of this overvoltage limiting circuit.
Adopting the exemplary switching device O1 that shows of field effect transistor in accompanying drawing 1 is field effect transistor, but should be understood that this switching device O1 also can be for IGBT manages, triode, and it also can play identical effect.
Therefore, by above-mentioned overvoltage limiting circuit, inhibition transient voltage that can fast and reliable, particularly powerful transient voltage impacts, and suppresses only to consume under the magnitude of voltage very little electric energy and set.
Above content is in conjunction with concrete preferred implementation further description made for the present invention; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine protection range by claims of submitting to.
Claims (3)
1. overvoltage limiting circuit is characterized in that:
Binding post 220V1 (1) is connected 23 with the positive pole of diode D1 (3) with diode D2) negative pole be connected; the negative pole of the negative pole of diode D1 (3) and diode D3 (4); the positive pole of electrochemical capacitor CD1 (5); one end of capacitor C 1 (6); one end of resistance R 1 (7); one end of resistance R 6 (10) joins; binding post 220V2 (2) is connected 22 with the positive pole of diode D3 (4) with diode D4) negative pole be connected; the positive pole of the positive pole of diode D2 (23) and diode D4 (22); the negative pole of electrochemical capacitor CD1 (5); the other end of capacitor C 1 (6); the other end of capacitor C 2 (9); the other end of resistance R 2 (18); the other end of resistance R 5 (17); the other end of resistance R 7 (14); the other end of resistance R 9 (19) joins; and be connected to the negative pole of the first dc power supply; the negative pole of the other end of resistance R 1 (7) and diode D5 (21); the end of potentiometer RW (8) joins; the normal phase input end of one end of capacitor C 2 (9) and amplifier IC1 (11); the central slide end of potentiometer RW (8) joins; one end of the positive pole of diode D5 (21) and resistance R 8 (20); one end of resistance R 9 (19) joins; one end of the other end of potentiometer RW (8) and resistance R 2 (18) joins; one end of the negative-phase input of amplifier IC1 (11) and resistance R 3 (12); one end of capacitor C 3 (15); one end of resistance R 5 (17); one end of resistance R 4 (16) joins; the other end of resistance R 4 (16); the other end of resistance R 8 (20) and the positive pole of the first dc power supply join; the other end of the output of amplifier IC1 (11) and resistance R 3 (12); the other end of capacitor C 3 (15); the grid of switching device O1 (13) joins; the drain electrode of the other end of resistance R 6 (10) and switching device O1 (13) is joined; one end of the source electrode of switching device O1 (13) and resistance R 7 (14) joins, and described binding post is the power supply that needs the electric equipment of protection.
2. overvoltage limiting circuit according to claim 1 is characterized in that:
Described switching device O1 is field effect transistor, IGBT pipe or triode.
3. overvoltage limiting circuit according to claim 1 is characterized in that:
Described amplifier IC1 is powered by the second dc power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310277234.6A CN103326344B (en) | 2013-07-03 | 2013-07-03 | A kind of overvoltage limiting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310277234.6A CN103326344B (en) | 2013-07-03 | 2013-07-03 | A kind of overvoltage limiting circuit |
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| CN103326344A true CN103326344A (en) | 2013-09-25 |
| CN103326344B CN103326344B (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310277234.6A Expired - Fee Related CN103326344B (en) | 2013-07-03 | 2013-07-03 | A kind of overvoltage limiting circuit |
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| CN (1) | CN103326344B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037724A (en) * | 2014-06-12 | 2014-09-10 | 四川联友电讯技术有限公司 | Overvoltage protection communication base station |
| CN104052046A (en) * | 2014-06-12 | 2014-09-17 | 四川联友电讯技术有限公司 | High-reliability communication base station controller |
| CN109921400A (en) * | 2019-04-03 | 2019-06-21 | 昆山通达测科电子科技有限公司 | High-speed high-power surge voltage-suppressing circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110317322A1 (en) * | 2008-12-18 | 2011-12-29 | System General Corp. | Control circuit with protection circuit for power supply |
| CN202696138U (en) * | 2012-06-05 | 2013-01-23 | 江苏固德威电源科技有限公司 | Excess voltage absorption protection circuit capable of accurately presetting protection value |
| CN103141002A (en) * | 2010-07-30 | 2013-06-05 | 霍廷格·鲍德温测量技术有限责任公司 | Protective circuit |
| CN203026930U (en) * | 2012-11-26 | 2013-06-26 | 西安威正电子科技有限公司 | Circuit for solving voltage overload of input port of operational amplifier |
-
2013
- 2013-07-03 CN CN201310277234.6A patent/CN103326344B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110317322A1 (en) * | 2008-12-18 | 2011-12-29 | System General Corp. | Control circuit with protection circuit for power supply |
| CN103141002A (en) * | 2010-07-30 | 2013-06-05 | 霍廷格·鲍德温测量技术有限责任公司 | Protective circuit |
| CN202696138U (en) * | 2012-06-05 | 2013-01-23 | 江苏固德威电源科技有限公司 | Excess voltage absorption protection circuit capable of accurately presetting protection value |
| CN203026930U (en) * | 2012-11-26 | 2013-06-26 | 西安威正电子科技有限公司 | Circuit for solving voltage overload of input port of operational amplifier |
Non-Patent Citations (1)
| Title |
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| 李春飞等: "多端口过压安全保护电路设计与研究", 《信息安全与技术》, 31 December 2011 (2011-12-31) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037724A (en) * | 2014-06-12 | 2014-09-10 | 四川联友电讯技术有限公司 | Overvoltage protection communication base station |
| CN104052046A (en) * | 2014-06-12 | 2014-09-17 | 四川联友电讯技术有限公司 | High-reliability communication base station controller |
| CN109921400A (en) * | 2019-04-03 | 2019-06-21 | 昆山通达测科电子科技有限公司 | High-speed high-power surge voltage-suppressing circuit |
| CN109921400B (en) * | 2019-04-03 | 2021-08-17 | 昆山通达测科电子科技有限公司 | High-speed high-power surge voltage suppression circuit |
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| Publication number | Publication date |
|---|---|
| CN103326344B (en) | 2015-10-28 |
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Inventor after: Liu Lianguang Inventor after: Jiang Zhihua Inventor after: Zheng Kuan Inventor after: Chen Yanwei Inventor after: Wang Kairang Inventor after: Ge Xiaoning Inventor before: Liu Lianguang Inventor before: Zheng Kuan Inventor before: Chen Yanwei |
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Granted publication date: 20151028 Termination date: 20200703 |
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