CN204732869U - A kind of high reliability overvoltage surge protective circuit - Google Patents
A kind of high reliability overvoltage surge protective circuit Download PDFInfo
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- CN204732869U CN204732869U CN201520534470.6U CN201520534470U CN204732869U CN 204732869 U CN204732869 U CN 204732869U CN 201520534470 U CN201520534470 U CN 201520534470U CN 204732869 U CN204732869 U CN 204732869U
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- switch pipe
- power switch
- overvoltage surge
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- voltage stabilizing
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Abstract
The utility model discloses a kind of high reliability overvoltage surge protective circuit, be divided into electric power system, signal sample circuit, signal receiving circuit and power switch pipe four part.When the DC transient supply power voltage of electric power system exceedes signal sample circuit set point, signal sample circuit is to signal receiving circuit transmission of signal, power switch pipe controls by signal receiving circuit, more high power switching tube conducting internal resistance is larger for signal, signal more weak power switch pipe conducting internal resistance is less, power switch pipe on off state linearly changes, thus suppresses overvoltage surge.The utility model debug process is convenient, and technology easily controls, and circuit topological structure is simple, and without the need to auxiliary power supply, overvoltage surge precision is high, and the reaction speed of overvoltage surge is fast, and reliability is high.
Description
Technical field
The utility model relates to a kind of protective circuit, specifically, relates to a kind of high reliability overvoltage surge protective circuit.
Background technology
Often can relate to the design of overvoltage surge protective circuit in actual applications; for the protective circuit that the longer voltage of surge time is higher; as the time is greater than the direct current surge voltage of more than the 60V of 50mS; be difficult to realize protection by single discrete device TVS pipe, because the withstand voltage span of TVS pipe is comparatively large, avalanche region is narrower;, voltage longer in the electrical surge time is higher; TVS pipe is easy to lose efficacy, and therefore, realizes overvoltage surge defencive function inadvisable by TVS pipe.Moreover realizing overvoltage surge defencive function with operational amplifier exactly, the reaction speed of overvoltage surge precision and overvoltage surge is all very optimistic, but from topological structure; circuit is comparatively complicated; and operational amplifier needs power supply separately, reliability is not high, is very limited when practical application.
Utility model content
A kind of high reliability overvoltage surge protective circuit that the utility model designs to solve the problems of the technologies described above just.
The utility model solves the technical scheme that its technical problem adopts:
A kind of high reliability overvoltage surge protective circuit, comprises photoelectrical coupler U1, power switch pipe Q1, voltage stabilizing didoe, resistance and electric capacity; Direct current input+Vin is connected with resistance R1, R3, tie point B and+Vo, and the resistance R1 other end is connected with resistance R2 and voltage stabilizing didoe Z1 negative electrode, and 4 pin and the power switch pipe Q1 grid of the resistance R2 other end and tie point A, photoelectrical coupler U1 are connected; Direct current input-Vin is connected with the 3 pin power switch pipe Q1 source electrodes of voltage stabilizing didoe Z1 anode photoelectrical coupler U1; The resistance R3 other end is connected with 1 pin of photoelectrical coupler U1, and after voltage stabilizing didoe Z2, Z3 and Z4 series connection, negative electrode is connected with 2 pin of photoelectrical coupler U1, and anode is connected with tie point C; Direct current output-Vo and tie point C drain with power switch pipe Q1 and are connected, and filter capacitor C1 is connected across direct current and exports between+Vo and-Vo.
Described a kind of high reliability overvoltage surge protective circuit, photoelectrical coupler U1 model is TLP181GB; Power switch pipe Q1 model is IRF3710S.
Described a kind of high reliability overvoltage surge protective circuit, the voltage stabilizing value of its voltage stabilizing didoe Z1 is 15V, and the voltage stabilizing value of voltage stabilizing didoe Z2, Z3 and Z4 is 12V.
A kind of high reliability overvoltage surge protective circuit is divided into electric power system, signal sample circuit, signal receiving circuit and power switch pipe four part.When the DC transient supply power voltage of electric power system exceedes signal sample circuit set point, signal sample circuit is to signal receiving circuit transmission of signal, power switch pipe controls by signal receiving circuit, more high power switching tube conducting internal resistance is larger for signal, signal more weak power switch pipe conducting internal resistance is less, power switch pipe on off state linearly changes, thus suppresses overvoltage surge.
After the specified steady state voltage of electric power system is set up; input transient state adds the direct current surge voltage higher than signal sample circuit set point; signal sample circuit is sampled at once; to signal receiving circuit transmission of signal; it is large that signal receiving circuit controls resistive in power switch pipe, makes overvoltage surge protective circuit output export nominal working range voltage.After overvoltage surge terminates; signal sample circuit attonity; signal sample circuit stops to signal receiving circuit transmission of signal; signal receiving circuit is out of hand to power switch pipe; power switch pipe internal resistance is close to zero, and the complete conducting of power switch pipe, enters steady-working state; reciprocal with this, realize overvoltage surge defencive function.
The beneficial effects of the utility model are that debug process is convenient, and technology easily controls, and circuit topological structure is simple; and without the need to auxiliary power supply, overvoltage surge precision is high, the reaction speed of overvoltage surge is fast; in overvoltage surge time 3S, protective circuit is working properly, and reliability aspect obtains effective guarantee.
Accompanying drawing explanation
Fig. 1 is for being the utility model overvoltage surge protective circuit module diagram.
Fig. 2 is embodiment circuit theory schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As illustrated in fig. 1 and 2, a kind of high reliability overvoltage surge of the utility model protective circuit, comprises photoelectrical coupler U1, power switch pipe Q1, voltage stabilizing didoe, resistance and electric capacity; Direct current input+Vin is connected with resistance R1, R3, tie point B and+Vo, and the resistance R1 other end is connected with resistance R2 and voltage stabilizing didoe Z1 negative electrode, and 4 pin and the power switch pipe Q1 grid of the resistance R2 other end and tie point A, photoelectrical coupler U1 are connected; Direct current input-Vin is connected with the 3 pin power switch pipe Q1 source electrodes of voltage stabilizing didoe Z1 anode photoelectrical coupler U1; The resistance R3 other end is connected with 1 pin of photoelectrical coupler U1, and after voltage stabilizing didoe Z2, Z3 and Z4 series connection, negative electrode is connected with 2 pin of photoelectrical coupler U1, and anode is connected with tie point C; Direct current output-Vo and tie point C drain with power switch pipe Q1 and are connected, and filter capacitor C1 is connected across direct current and exports between+Vo and-Vo.
Described a kind of high reliability overvoltage surge protective circuit, photoelectrical coupler U1 model is TLP181GB; Power switch pipe Q1 model is IRF3710S.
Described a kind of high reliability overvoltage surge protective circuit, the voltage stabilizing value of its voltage stabilizing didoe Z1 is 15V, and the voltage stabilizing value of voltage stabilizing didoe Z2, Z3 and Z4 is 12V.
A high reliability overvoltage surge protective circuit as shown in Figure 1, it is divided into electric power system 1, signal sample circuit 2, signal receiving circuit 3 and power switch pipe 4 four part, and four part order connect.
Embodiment: refer to Fig. 2; overvoltage surge protective circuit B point is signal sample circuit to C point current potential; after current-limiting resistance R3, photoelectrical coupler light-emitting diode, voltage-stabiliser tube Z1, Z2, Z3 series connection; B point is 40V to the highest permission current potential of C point; power switch pipe selects model to be the high-power MOS tube of IRF3710S; temporary impact electric current can reach 180A, and maximum power can reach 200W.
Overvoltage surge protective circuit direct voltage input range is 20 ~ 40V; after the specified input range steady state voltage of overvoltage surge protective circuit is set up; photoelectrical coupler light-emitting diode is not luminous; the non-Received signal strength attonity of photoelectrical coupler illuminated triode; A point current potential keeps 15V; power switch pipe Q1 saturation conduction, overvoltage surge protective circuit does not work, and overvoltage surge protective circuit input is identical with output end voltage.
After the specified input range steady state voltage of overvoltage surge protective circuit is set up, for the direct current 100V voltage that the overvoltage surge protective circuit input joining day is 200mS, A point initial potential is 15V, power switch pipe Q1 saturation conduction, the rapid detection signal of signal sample circuit, B point to C point current potential more than 40V, photoelectrical coupler light-emitting diode starts luminescence, to photoelectrical coupler illuminated triode transmission of signal, photoelectrical coupler illuminated triode is linearly open-minded, A point current potential is dragged down, in power switch pipe Q1 conducting, resistive is large, the linear conducting of power switch pipe Q1, overvoltage surge protective circuit output exports and is clamped to 40V, signal sample circuit continues sampling, until signal sample circuit B point is less than 40V to C point current potential, overvoltage surge protective circuit input is identical with output end voltage, complete overvoltage surge protection task.
In overvoltage surge protective circuit process of the test, overvoltage surge precision controlling is better, and during overvoltage surge, reaction speed is fast, and the resistance to overvoltage surge time is long, and the utility model can meet various harsh service condition, realizes high reliability overvoltage surge defencive function.
The utility model is not limited to above-mentioned preferred forms, anyone other any or akin products identical with the utility model drawn under enlightenment of the present utility model, all drops within protection range of the present utility model.
Claims (3)
1. a high reliability overvoltage surge protective circuit, comprises photoelectrical coupler U1, power switch pipe Q1, voltage stabilizing didoe, resistance and electric capacity; It is characterized in that: direct current input+Vin is connected with resistance R1, R3, tie point B and+Vo, the resistance R1 other end is connected with resistance R2 and voltage stabilizing didoe Z1 negative electrode, and 4 pin and the power switch pipe Q1 grid of the resistance R2 other end and tie point A, photoelectrical coupler U1 are connected; Direct current input-Vin is connected with the 3 pin power switch pipe Q1 source electrodes of voltage stabilizing didoe Z1 anode photoelectrical coupler U1; The resistance R3 other end is connected with 1 pin of photoelectrical coupler U1, and after voltage stabilizing didoe Z2, Z3 and Z4 series connection, negative electrode is connected with 2 pin of photoelectrical coupler U1, and anode is connected with tie point C; Direct current output-Vo and tie point C drain with power switch pipe Q1 and are connected, and filter capacitor C1 is connected across direct current and exports between+Vo and-Vo.
2. a kind of high reliability overvoltage surge protective circuit according to claim 1, is characterized in that: photoelectrical coupler U1 model is TLP181GB; Power switch pipe Q1 model is IRF3710S.
3. a kind of high reliability overvoltage surge protective circuit according to claim 1, is characterized in that: the voltage stabilizing value of voltage stabilizing didoe Z1 is 15V, and the voltage stabilizing value of voltage stabilizing didoe Z2, Z3 and Z4 is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520534470.6U CN204732869U (en) | 2015-07-22 | 2015-07-22 | A kind of high reliability overvoltage surge protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520534470.6U CN204732869U (en) | 2015-07-22 | 2015-07-22 | A kind of high reliability overvoltage surge protective circuit |
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| Publication Number | Publication Date |
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| CN204732869U true CN204732869U (en) | 2015-10-28 |
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| CN201520534470.6U Active CN204732869U (en) | 2015-07-22 | 2015-07-22 | A kind of high reliability overvoltage surge protective circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448557A (en) * | 2018-03-07 | 2018-08-24 | 中国船舶重工集团公司第七二三研究所 | A kind of High Power Airborne DC over-voltage surge restraint circuit |
| CN109245073A (en) * | 2018-09-28 | 2019-01-18 | 深圳市崧盛电子股份有限公司 | A kind of control circuit and power supply inhibiting power voltage surge electric current |
| CN109756099A (en) * | 2019-03-26 | 2019-05-14 | 西安霍威电源有限公司 | A kind of power module of alternating current-direct current mixing |
| CN112866875A (en) * | 2021-01-14 | 2021-05-28 | 四川湖山电器股份有限公司 | Startup and shutdown anti-impact circuit for digital audio processor |
-
2015
- 2015-07-22 CN CN201520534470.6U patent/CN204732869U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448557A (en) * | 2018-03-07 | 2018-08-24 | 中国船舶重工集团公司第七二三研究所 | A kind of High Power Airborne DC over-voltage surge restraint circuit |
| CN109245073A (en) * | 2018-09-28 | 2019-01-18 | 深圳市崧盛电子股份有限公司 | A kind of control circuit and power supply inhibiting power voltage surge electric current |
| CN109245073B (en) * | 2018-09-28 | 2020-06-23 | 深圳市崧盛电子股份有限公司 | Control circuit for suppressing surge voltage and current of power supply and power supply |
| CN109756099A (en) * | 2019-03-26 | 2019-05-14 | 西安霍威电源有限公司 | A kind of power module of alternating current-direct current mixing |
| CN112866875A (en) * | 2021-01-14 | 2021-05-28 | 四川湖山电器股份有限公司 | Startup and shutdown anti-impact circuit for digital audio processor |
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