CN205178500U - Exchange excessive pressure surge suppressor - Google Patents
Exchange excessive pressure surge suppressor Download PDFInfo
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- CN205178500U CN205178500U CN201521053945.6U CN201521053945U CN205178500U CN 205178500 U CN205178500 U CN 205178500U CN 201521053945 U CN201521053945 U CN 201521053945U CN 205178500 U CN205178500 U CN 205178500U
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Abstract
The utility model discloses an exchange excessive pressure surge suppressor, including AC input voltage source, direct current reference voltage source, with AC input voltage source follower end meet and the alternating voltage step -down rectifier transform that provides the AC input voltage source for the ACDC converting circuit of the two voltages of positive and negative direct current and the excessive pressure surge inhibiting module that connects with the output in AC input voltage source and direct current reference voltage source's output homogeneous phase, excessive pressure surge inhibiting module is including the comparator, reference voltage source 0 and the MOSFET reference voltage source 1 that connect gradually, the input of comparator meets with the output in AC input voltage source and direct current reference voltage source's output respectively, and ACDC converting circuit meets with the comparator and for the comparator provides positive and negative direct current pair voltage sources, the utility model relates to a novelty has the function of real -time detection AC input voltage excessive pressure to can avoid exchanging the excessive pressure surge and damage for safe value, protection consumer exchanging excessive pressure voltage clamp, the practicality be strong.
Description
Technical field
The utility model belongs to interchange overvoltage technical field, is specifically related to a kind of interchange overvoltage surge inhibitor.
Background technology
Along with the development of science and technology, the large power-consuming equipments such as a large amount of motors, engine are widely used in each place of productive life, for load increase or reduce and all can cause the fluctuation of line voltage, during peak times of power consumption, voltage is often on the low side, when having an equipment downtime, voltage is often higher, and the normal power consumption equipment generation instantaneous stop run can cause output voltage unstable, because the increase and decrease phenomenon of various load emerges in an endless stream, make ac output voltage unstable, during routine use power supply, no matter be that direct current exports or exchanges output, all can set up power protecting circuit between power supply and power consumption equipment, effective suppression overvoltage surge fault, on market, overvoltage surge inhibitor mostly is and suppresses the surge over voltage of direct voltage, exchange overvoltage surge inhibitor few, and most surge suppressor many employings over-voltage detection circuit, when there is overvoltage surge fault, the output of cut-ff voltage, cut off the electricity supply, although protect the damage of power consumption equipment from overvoltage phenomenon, but equipment can be caused to stop transport, unnecessary trouble is caused to productive life.Therefore, nowadays lack the interchange overvoltage surge inhibitor that a kind of structure is simple, volume is little, cost is low, reasonable in design, when input ac voltage is in normal range (NR), output voltage follows input voltage, and alternating voltage normally exports; When input ac voltage presents overvoltage surge voltage, the positive and negative half-wave of the alternating voltage of output, all by clamp, makes output AC voltage be the safe input voltage that power consumption equipment allows, thus protects power consumption equipment from the damage exchanging overvoltage surge.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art; there is provided a kind of and exchange overvoltage surge inhibitor; it is rationally novel in design; structure is simple; have the function detecting AC-input voltage overvoltage in real time, and can be safety value by interchange overvoltage voltage clamp, protection power consumption equipment damages from interchange overvoltage surge; practical, be convenient to promote the use of.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of interchange overvoltage surge inhibitor, it is characterized in that: comprise AC-input voltage source, DC reference voltage source, connect with described AC-input voltage source output terminal and the alternating voltage step-down rectifier that AC-input voltage source the is provided AC/DC change-over circuit that is transformed to positive and negative direct current twin voltage and the overvoltage surge suppression module that all connects with the output in described AC-input voltage source and the output in described DC reference voltage source, described overvoltage surge suppression module comprises the comparator connected successively, buffer circuit and switch mosfet circuit, the input of described comparator connects with the output in described AC-input voltage source and the output in described DC reference voltage source respectively, described AC/DC change-over circuit connects with comparator and provides positive and negative direct current double-voltage electric power for comparator, described DC reference voltage source connects with switch mosfet circuit, and described buffer circuit all connects with AC/DC change-over circuit and DC reference voltage source.
Above-mentioned one exchanges overvoltage surge inhibitor, it is characterized in that: described DC reference voltage source comprises DC reference power supply DC1, and the two ends of described DC reference power supply DC1 are also connected with electric capacity C1.
Above-mentioned one exchanges overvoltage surge inhibitor, and it is characterized in that: described comparator comprises amplifier U1 and amplifier U2, the in-phase input end of described amplifier U1 divides two-way, and a road connects with the negative electrode of diode D1, and another road is through resistance R9 ground connection; The anode of diode D1 connects with the ac voltage output in AC-input voltage source through resistance R3, the inverting input of amplifier U1 divides two-way, one tunnel connects with the negative electrode of voltage stabilizing didoe D4, and another road connects with the positive pole of DC reference power supply DC1 and the link of electric capacity C1 through resistance R6; The plus earth of voltage stabilizing didoe D4; The inverting input of described amplifier U2 divides two-way, and a road connects with the negative electrode of diode D2, and another road is through resistance R10 ground connection; The anode of diode D2 connects with the ac voltage output in AC-input voltage source through resistance R4, the in-phase input end of amplifier U2 divides two-way, one tunnel connects with the anode of voltage stabilizing didoe D3, and another road connects with the negative pole of DC reference power supply DC1 and the link of electric capacity C1 through resistance R5; The minus earth of voltage stabilizing didoe D3.
Above-mentioned one exchanges overvoltage surge inhibitor, it is characterized in that: described buffer circuit comprises isolating chip U3 and isolating chip U4,1st pin of described isolating chip U3 connects with the positive direct-current voltages output of AC/DC change-over circuit through resistance R7,2nd pin of isolating chip U3 connects with the output of amplifier U1, and the 4th pin of isolating chip U3 connects with the positive pole of DC reference power supply DC1 and the link of electric capacity C1; 1st pin of described isolating chip U4 connects with the positive direct-current voltages output of AC/DC change-over circuit through resistance R8,2nd pin of isolating chip U4 connects with the output of amplifier U2, and the 4th pin of isolating chip U4 connects with the positive pole of DC reference power supply DC1 and the link of electric capacity C1.
Above-mentioned one exchanges overvoltage surge inhibitor, it is characterized in that: described switch mosfet circuit comprises MOSFET pipe Q1 and MOSFET pipe Q2, the grid of described MOSFET pipe Q1 divides two-way, and a road connects with the 3rd pin of isolating chip U3, and another road connects with one end of resistance R1; The other end of resistance R1 divides three tunnels, and a road connects with one end of resistance R2, and another road connects with the link of the source electrode of MOSFET pipe Q1 and the source electrode of MOSFET pipe Q2, and the 3rd tunnel connects with the negative pole of DC reference power supply DC1 and the link of electric capacity C1; The other end of resistance R2 divides two-way, and a road connects with the grid of MOSFET pipe Q2, and the 3rd pin of another road isolating chip U4 connects.
The utility model compared with prior art has the following advantages:
1, the utility model is by arranging switch mosfet circuit, and when the conducting of two MOSFET pipes, line drop is 0, and output voltage follows input voltage; When two MOSFET pipe cut-offs, surge over voltage pressure drop shared by two MOSFET pipes, and suppress overvoltage fault, the positive and negative half-wave of the alternating voltage of output is all by clamp, and result of use is good.
2, the utility model is by arranging DC reference voltage source, the size of data in AC-input voltage source and DC reference voltage source is compared in real time by comparator, amplifier U1 and amplifier U2 is adopted to gather the positive half wave of alternating voltage and the negative half-wave size of data of alternating voltage respectively, and carry out computing with DC reference voltage source respectively and compare, when the generating positive and negative voltage data in the AC-input voltage source gathered are less than DC reference voltage source data, the conducting of two MOSFET pipes; When the generating positive and negative voltage data in the AC-input voltage source gathered are greater than DC reference voltage source data, two MOSFET pipe cut-offs, circuit is simple, and cost is low, is convenient to promote the use of.
3, the utility model is by arranging buffer circuit, avoids signal disturbing between circuit, reliable and stable, and result of use is good.
4, the utility model is rationally novel in design, and volume is little, easy for installation, practical, is convenient to promote the use of.
In sum, the utility model is rationally novel in design, and structure is simple; have the function detecting AC-input voltage overvoltage in real time, and can be safety value by interchange overvoltage voltage clamp, protection power consumption equipment damages from interchange overvoltage surge; practical, be convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Description of reference numerals:
1-AC-input voltage source; 2-DC reference voltage source; 3-AC/DC change-over circuit;
4-comparator; 5-buffer circuit; 6-switch mosfet circuit.
Embodiment
As shown in Figure 1, the utility model comprises AC-input voltage source 1, DC reference voltage source 2, to connect with described AC-input voltage source 1 output and the alternating voltage step-down rectifier provided in the AC-input voltage source 1 AC/DC change-over circuit 3 that is transformed to positive and negative direct current twin voltage and the overvoltage surge suppression module that all connects with the output in described AC-input voltage source 1 and the output in described DC reference voltage source 2, and described overvoltage surge suppression module comprises the comparator 4, buffer circuit 5 and the switch mosfet circuit 6 that connect successively; The input of described comparator 4 connects with the output in described AC-input voltage source 1 and the output in described DC reference voltage source 2 respectively, described AC/DC change-over circuit 3 connects with comparator 4 and provides positive and negative direct current double-voltage electric power for comparator 4, described DC reference voltage source 2 connects with switch mosfet circuit 6, and described buffer circuit 5 all connects with AC/DC change-over circuit 3 and DC reference voltage source 2.
In actual use, described AC/DC change-over circuit 3 is the voltage conversion circuit AC-DC1 comprising rectification circuit, filter circuit and voltage regulator circuit, described voltage conversion circuit AC-DC1 comprises two ac input ends and two DC output ends, an ac input end of described voltage conversion circuit AC-DC1 divides two-way, one tunnel connects with the signal output part in AC-input voltage source 1 through electric capacity C2, another road through electric capacity C4 ground connection, another ac input end ground connection of described voltage conversion circuit AC-DC1.
As shown in Figure 2, in the present embodiment, described DC reference voltage source 2 comprises DC reference power supply DC1, and the two ends of described DC reference power supply DC1 are also connected with electric capacity C1.
Actual use, DC reference power supply DC1 is the exportable direct voltage source stablizing positive negative dc voltage, the two ends of DC reference power supply DC1 to be connected with electric capacity C1 be that the electric capacity C1 burning voltage that charges exports.
As shown in Figure 2, in the present embodiment, described comparator 4 comprises amplifier U1 and amplifier U2, and the in-phase input end of described amplifier U1 divides two-way, and a road connects with the negative electrode of diode D1, and another road is through resistance R9 ground connection; The anode of diode D1 connects with the ac voltage output in AC-input voltage source 1 through resistance R3, the inverting input of amplifier U1 divides two-way, one tunnel connects with the negative electrode of voltage stabilizing didoe D4, and another road connects with the positive pole of DC reference power supply DC1 and the link of electric capacity C1 through resistance R6; The plus earth of voltage stabilizing didoe D4; The inverting input of described amplifier U2 divides two-way, and a road connects with the negative electrode of diode D2, and another road is through resistance R10 ground connection; The anode of diode D2 connects with the ac voltage output in AC-input voltage source through resistance R4, the in-phase input end of amplifier U2 divides two-way, one tunnel connects with the anode of voltage stabilizing didoe D3, and another road connects with the negative pole of DC reference power supply DC1 and the link of electric capacity C1 through resistance R5; The minus earth of voltage stabilizing didoe D3.
In actual use, the positive negative dc voltage of two DC output ends outputs of described voltage conversion circuit AC-DC1 is simultaneously for the power pin of amplifier U1 and amplifier U2 provides positive and negative direct current twin voltage to power.
As shown in Figure 2, in the present embodiment, described buffer circuit 5 comprises isolating chip U3 and isolating chip U4,1st pin of described isolating chip U3 connects with the positive direct-current voltages output of AC/DC change-over circuit 3 through resistance R7,2nd pin of isolating chip U3 connects with the output of amplifier U1, and the 4th pin of isolating chip U3 connects with the positive pole of DC reference power supply DC1 and the link of electric capacity C1; 1st pin of described isolating chip U4 connects with the positive direct-current voltages output of AC/DC change-over circuit 3 through resistance R8,2nd pin of isolating chip U4 connects with the output of amplifier U2, and the 4th pin of isolating chip U4 connects with the positive pole of DC reference power supply DC1 and the link of electric capacity C1.
As shown in Figure 2, in the present embodiment, described switch mosfet circuit 6 comprises MOSFET pipe Q1 and MOSFET pipe Q2, and the grid of described MOSFET pipe Q1 divides two-way, and a road connects with the 3rd pin of isolating chip U3, and another road connects with one end of resistance R1; The other end of resistance R1 divides three tunnels, and a road connects with one end of resistance R2, and another road connects with the link of the source electrode of MOSFET pipe Q1 and the source electrode of MOSFET pipe Q2, and the 3rd tunnel connects with the negative pole of DC reference power supply DC1 and the link of electric capacity C1; The other end of resistance R2 divides two-way, and a road connects with the grid of MOSFET pipe Q2, and the 3rd pin of another road isolating chip U4 connects.
When the utility model uses, AC-input voltage source 1 is adopted to power for AC electric equipment, when the alternating voltage inputted when AC-input voltage source 1 is in normal range (NR), the positive half wave data of the alternating voltage that amplifier U1 gathers are less than the positive direct-current reference voltage data in DC reference voltage source 2, negative half wave datum of the alternating voltage that amplifier U2 gathers is greater than the negative DC reference voltage data in DC reference voltage source 2, amplifier U1 and amplifier U2 all exports electronegative potential, buffer circuit 5 conducting, the grid of the MOSFET pipe Q1 in switch mosfet circuit 6 and the grid of source electrode and MOSFET pipe Q2 and source electrode all have pressure drop, switch mosfet circuit 6 conducting, ac output voltage follows the input voltage in AC-input voltage source 1, alternating voltage normally exports, when the alternating voltage generation overvoltage surge fault that AC-input voltage source 1 inputs, the positive half wave data of the alternating voltage that amplifier U1 gathers are greater than the positive direct-current reference voltage data in DC reference voltage source 2, negative half wave datum of the alternating voltage that amplifier U2 gathers is less than the negative DC reference voltage data in DC reference voltage source 2, amplifier U1 and amplifier U2 all exports high potential, buffer circuit 5 is obstructed, the grid of the MOSFET pipe Q1 in switch mosfet circuit 6 and the grid of source electrode and MOSFET pipe Q2 and source electrode are all without pressure drop, switch mosfet circuit 6 is obstructed, to cause between the drain electrode of MOSFET pipe Q1 and source electrode and between the drain electrode of MOSFET pipe Q2 and source electrode, voltage increases, inhibit to exchange and export large voltage, the positive and negative half-wave of the alternating voltage exported is all by clamp, output AC voltage is made to be the safe input voltage that power consumption equipment allows, it is that comparator 4 and buffer circuit 5 are powered that the alternating voltage that AC/DC change-over circuit 3 directly adopts AC-input voltage source 1 to input carries out voltage transformation, volume is little, result of use is good.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure change, all still belong in the protection range of technical solutions of the utility model.
Claims (5)
1. one kind exchanges overvoltage surge inhibitor, it is characterized in that: comprise AC-input voltage source (1), DC reference voltage source (2), connect with described AC-input voltage source (1) output and the AC/DC change-over circuit (3) the alternating voltage step-down rectifier that AC-input voltage source (1) provides being transformed to positive and negative direct current twin voltage and the overvoltage surge suppression module all connected with the output of described AC-input voltage source (1) and the output in described DC reference voltage source (2), described overvoltage surge suppression module comprises the comparator (4) connected successively, buffer circuit (5) and switch mosfet circuit (6), the input of described comparator (4) connects with the output of described AC-input voltage source (1) and the output in described DC reference voltage source (2) respectively, described AC/DC change-over circuit (3) connects with comparator (4) and provides positive and negative direct current double-voltage electric power for comparator (4), described DC reference voltage source (2) connects with switch mosfet circuit (6), and described buffer circuit (5) all connects with AC/DC change-over circuit (3) and DC reference voltage source (2).
2. exchange overvoltage surge inhibitor according to one according to claim 1, it is characterized in that: described DC reference voltage source (2) comprises DC reference power supply DC1, the two ends of described DC reference power supply DC1 are also connected with electric capacity C1.
3. exchange overvoltage surge inhibitor according to one according to claim 2, it is characterized in that: described comparator (4) comprises amplifier U1 and amplifier U2, the in-phase input end of described amplifier U1 divides two-way, and a road connects with the negative electrode of diode D1, and another road is through resistance R9 ground connection; The anode of diode D1 connects with the ac voltage output of AC-input voltage source (1) through resistance R3, the inverting input of amplifier U1 divides two-way, one tunnel connects with the negative electrode of voltage stabilizing didoe D4, and another road connects with the positive pole of DC reference power supply DC1 and the link of electric capacity C1 through resistance R6; The plus earth of voltage stabilizing didoe D4; The inverting input of described amplifier U2 divides two-way, and a road connects with the negative electrode of diode D2, and another road is through resistance R10 ground connection; The anode of diode D2 connects with the ac voltage output of AC-input voltage source (1) through resistance R4, the in-phase input end of amplifier U2 divides two-way, one tunnel connects with the anode of voltage stabilizing didoe D3, and another road connects with the negative pole of DC reference power supply DC1 and the link of electric capacity C1 through resistance R5; The minus earth of voltage stabilizing didoe D3.
4. exchange overvoltage surge inhibitor according to one according to claim 3, it is characterized in that: described buffer circuit (5) comprises isolating chip U3 and isolating chip U4,1st pin of described isolating chip U3 connects with the positive direct-current voltages output of AC/DC change-over circuit (3) through resistance R7,2nd pin of isolating chip U3 connects with the output of amplifier U1, and the 4th pin of isolating chip U3 connects with the positive pole of DC reference power supply DC1 and the link of electric capacity C1; 1st pin of described isolating chip U4 connects with the positive direct-current voltages output of AC/DC change-over circuit (3) through resistance R8,2nd pin of isolating chip U4 connects with the output of amplifier U2, and the 4th pin of isolating chip U4 connects with the positive pole of DC reference power supply DC1 and the link of electric capacity C1.
5. exchange overvoltage surge inhibitor according to one according to claim 4, it is characterized in that: described switch mosfet circuit (6) comprises MOSFET pipe Q1 and MOSFET pipe Q2, the grid of described MOSFET pipe Q1 divides two-way, one tunnel connects with the 3rd pin of isolating chip U3, and another road connects with one end of resistance R1; The other end of resistance R1 divides three tunnels, and a road connects with one end of resistance R2, and another road connects with the link of the source electrode of MOSFET pipe Q1 and the source electrode of MOSFET pipe Q2, and the 3rd tunnel connects with the negative pole of DC reference power supply DC1 and the link of electric capacity C1; The other end of resistance R2 divides two-way, and a road connects with the grid of MOSFET pipe Q2, and the 3rd pin of another road isolating chip U4 connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521053945.6U CN205178500U (en) | 2015-12-16 | 2015-12-16 | Exchange excessive pressure surge suppressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521053945.6U CN205178500U (en) | 2015-12-16 | 2015-12-16 | Exchange excessive pressure surge suppressor |
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| Publication Number | Publication Date |
|---|---|
| CN205178500U true CN205178500U (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521053945.6U Active CN205178500U (en) | 2015-12-16 | 2015-12-16 | Exchange excessive pressure surge suppressor |
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| CN (1) | CN205178500U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467996A (en) * | 2019-09-06 | 2021-03-09 | 群光电能科技股份有限公司 | High-low pressure compensation device |
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2015
- 2015-12-16 CN CN201521053945.6U patent/CN205178500U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467996A (en) * | 2019-09-06 | 2021-03-09 | 群光电能科技股份有限公司 | High-low pressure compensation device |
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