CN204886132U - Prevent voltage pulse circuit - Google Patents
Prevent voltage pulse circuit Download PDFInfo
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- CN204886132U CN204886132U CN201520648228.1U CN201520648228U CN204886132U CN 204886132 U CN204886132 U CN 204886132U CN 201520648228 U CN201520648228 U CN 201520648228U CN 204886132 U CN204886132 U CN 204886132U
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Abstract
The utility model discloses a prevent voltage pulse circuit, including direct current voltage input end, a bleeder circuit, first switch tube circuit, the 2nd bleeder circuit, second switch pipe circuit and DC voltage output end, the 2nd bleeder circuit's feedback end is connected to the common port of first switch tube circuit, and direct current voltage input end is connected to the output of first switch tube circuit, and a bleeder circuit's feedback end is connected to the control end of first switch tube circuit, the DC voltage output end is connected to the common port of second switch pipe circuit, and direct current voltage input end is connected to the output of second switch pipe circuit, and the 2nd bleeder circuit's feedback end is connected to the control end of second switch pipe circuit, a bleeder circuit's output and the 2nd bleeder circuit's output ground connection are connected with direct current voltage input end respectively to a bleeder circuit's input and the 2nd bleeder circuit's input. Adopt the utility model discloses technical scheme makes the circuit volume less, and the cost is lower, prevents that voltage pulse's effect is better.
Description
Technical field
The utility model relates to electronic circuit technology field, specifically a kind of anti-voltage pulse circuit.
Background technology
Along with the develop rapidly of China's economy, the recoverable amount of automobile also increases thereupon fast.The various electric equipments arranged in automobile are little of the components and parts such as bulb, thyristor, arrive greatly instrument, control the various power consumption equipments such as computer, and all need to use low-voltage dc power supply, the low-voltage dc power supply on automobile is provided by storage battery and generator usually.Automobile, when starting, provides electric energy by storage battery, for the various power consumption equipments on automobile are powered; After automobile is turned on, be then that power consumption equipment is powered by generator, the unnecessary electric energy of generator is then for being charge in batteries.Various power consumption equipments on automobile have self withstand voltage scope, but the supply power voltage of circuit is very unstable on automobile, especially when automobile is struck sparks, higher potential pulse is just had in power supply circuits, once exceed the normal working voltage of power consumption equipment, damage will be caused to power consumption equipment, heavy then burn power consumption equipment, bring about great losses.
A kind of anti-voltage pulse circuit is provided in prior art, as shown in Figure 1, adopt the mode of voltage stabilizing didoe and LC filter circuit by input voltage pulse filtering, when potential pulse power is higher, just need voltage stabilizing didoe D1 to have larger power, inductance L 1 and electric capacity C1 have larger energy storage capacity, these component sizes will be caused so bigger than normal, price is higher, and then makes whole circuit volume bigger than normal, and price is higher; Higher potential pulse is after the process of this circuit filtering, and the output voltage of output still has the normal working voltage that may exceed power consumption equipment, there is the risk of burning power consumption equipment, causes this circuit preventing electricity to press the effect of pulse poor; This circuit is in running, and higher potential pulse can cause damage to the electronic devices and components in this circuit, makes the reliability of this circuit lower.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a kind of anti-voltage pulse circuit, circuit small volume, cost is lower, and the effect of anti-potential pulse is better.
In order to achieve the above object, the utility model embodiment is by the following technical solutions:
Described anti-voltage pulse circuit comprises DC voltage input end, the first bleeder circuit, the first switching tube circuit, the second bleeder circuit, second switch pipe circuit and DC voltage output end; The common port of described first switching tube circuit connects the feedback end of described second bleeder circuit, the output of described first switching tube circuit connects described DC voltage input end, and the control end of described first switching tube circuit connects the feedback end of described first bleeder circuit; The common port of described second switch pipe circuit connects described DC voltage output end, and the output of described second switch pipe circuit connects described DC voltage input end, and the control end of described second switch pipe circuit connects the feedback end of described second bleeder circuit; The input of described first bleeder circuit is connected with described DC voltage input end respectively with the input of described second bleeder circuit, the output of described first bleeder circuit and the output head grounding of described second bleeder circuit.
In one embodiment, described first switching tube circuit comprises triode, and described second switch pipe circuit comprises field effect transistor.
Further, described triode is positive-negative-positive; The collector electrode of described triode connects the common port of described first switching tube circuit, and the emitter of described triode connects the output of described first switching tube circuit, and the base stage of described triode connects the control end of described first switching tube circuit.
Further again, described field effect transistor is P channel-type; The drain electrode of described field effect transistor connects the common port of described second switch pipe circuit, and the source electrode of described field effect transistor connects the output of described second switch pipe circuit, and the grid of described field effect transistor connects the control end of described second switch pipe circuit.
In another embodiment, described first switching tube circuit comprises field effect transistor, and described second switch pipe circuit comprises triode.
Further, described field effect transistor is P channel-type; The drain electrode of described field effect transistor connects the common port of described first switching tube circuit, and the source electrode of described field effect transistor connects the output of described first switching tube circuit, and the grid of described field effect transistor connects the control end of described first switching tube circuit; Described triode is positive-negative-positive; The collector electrode of described triode connects the common port of described second switch pipe circuit, and the emitter of described triode connects the output of described second switch pipe circuit, and the base stage of described triode connects the control end of described second switch pipe circuit.
Further again, described first bleeder circuit comprises the second resistance and voltage stabilizing didoe; One end of described second resistance connects the input of described first bleeder circuit, the other end of described second resistance is connected with the feedback end of described first bleeder circuit respectively with the negative pole of described voltage stabilizing didoe, and the positive pole of described voltage stabilizing didoe connects the output of described first bleeder circuit.
Further, described first bleeder circuit also comprises the 3rd resistance; The negative pole of described voltage stabilizing didoe is connected with the feedback end of described first bleeder circuit by described 3rd resistance.
Further, described second bleeder circuit comprises the first resistance and the 4th resistance; One end of described first resistance connects the input of described second bleeder circuit, the other end of described first resistance is connected with the feedback end of described second bleeder circuit respectively with one end of described 4th resistance, and the other end of described 4th resistance connects the output of described second bleeder circuit.
Further, described second bleeder circuit also comprises electric capacity; Described electric capacity and described first resistor coupled in parallel.
The anti-voltage pulse circuit of the one that the utility model embodiment provides, when the electric current of DC voltage input end input normal voltage, second switch pipe circuit turn-on, DC voltage output end exports the electric current of normal voltage; When the potential pulse that DC voltage input end input is higher, second switch pipe circuit disconnects, DC voltage output end is output current not, thus the situation avoiding the higher infringement power consumption equipment of DC voltage output end output voltage occurs, and reaches the effect of anti-potential pulse.This circuit is not high to the specification requirement of electronic devices and components in circuit, so can adopt the electronic devices and components of low specification, make whole circuit small volume, cost is lower; When the potential pulse that DC voltage input end input is higher, DC voltage output end is output current not, there is not the situation that output voltage can exceed the normal working voltage of power consumption equipment, makes this circuit preventing electricity press the effect of pulse better; Higher potential pulse can not cause damage to the electronic devices and components in this circuit, makes the reliability of this circuit higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of anti-voltage pulse circuit of the prior art;
Fig. 2 is the structural representation of the first embodiment of the anti-voltage pulse circuit that the utility model provides;
Fig. 3 is the structural representation of the second embodiment of the anti-voltage pulse circuit that the utility model provides;
Fig. 4 is the structural representation of the 3rd embodiment of the anti-voltage pulse circuit that the utility model provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.
See Fig. 2, the structural representation of the first embodiment of the anti-voltage pulse circuit provided for the utility model.
Described anti-voltage pulse circuit comprises DC voltage input end 101, first bleeder circuit 102, first switching tube circuit 103, second bleeder circuit 104, second switch pipe circuit 105 and DC voltage output end 106.
The common port of described first switching tube circuit 103 connects the feedback end of described second bleeder circuit 104, the output of described first switching tube circuit 103 connects described DC voltage input end 101, and the control end of described first switching tube circuit 103 connects the feedback end of described first bleeder circuit 102; The common port of described second switch pipe circuit 105 connects described DC voltage output end 106, the output of described second switch pipe circuit 105 connects described DC voltage input end 101, and the control end of described second switch pipe circuit 105 connects the feedback end of described second bleeder circuit 104; The input of described first bleeder circuit 102 is connected with described DC voltage input end 101 respectively with the input of described second bleeder circuit 104, the output of described first bleeder circuit 102 and the output of described second bleeder circuit 104 ground connection respectively.When DC voltage input end 101 inputs the electric current of normal voltage, the conducting of second switch pipe circuit 105, DC voltage output end 106 exports the electric current of normal voltage; When DC voltage input end 101 inputs higher potential pulse, second switch pipe circuit 105 disconnects, DC voltage output end 106 not output current, thus the situation avoiding the higher infringement power consumption equipment of DC voltage output end 106 output voltage occurs, and reaches the effect of anti-potential pulse.
In the middle of concrete enforcement, the switching tube in described anti-voltage pulse circuit can be the three side controller parts such as triode, field effect transistor, IGBT, thyristor or its derivation device.Wherein, the control end of switching tube, common port and output, the base stage of triode, collector electrode, emitter can be corresponded respectively to, the grid of field effect transistor, drain electrode, source electrode, the grid of IGBT, collector electrode, emitter, the grid of unidirectional thyristor, anode, negative electrode, the grid of bidirectional thyristor, port 2, port one.
Below for convenience of description, only for triode and field effect transistor, the technical scheme to the embodiment of the present invention is described respectively, and the switching tube in the anti-voltage pulse circuit that the embodiment of the present invention provides is not limited to triode and field effect transistor.
See Fig. 3, the structural representation of the second embodiment of the anti-voltage pulse circuit provided for the utility model.
Described anti-voltage pulse circuit comprises DC voltage input end VCCIN, the first bleeder circuit, the first switching tube circuit, the second bleeder circuit, second switch pipe circuit and DC voltage output end OUT.
Concrete, described first switching tube circuit comprises triode Q1, and described second switch pipe circuit comprises field effect transistor Q2.Described triode Q1 is positive-negative-positive; The collector electrode of described triode Q1 connects the common port of described first switching tube circuit, and the emitter of described triode Q1 connects the output of described first switching tube circuit, and the base stage of described triode Q1 connects the control end of described first switching tube circuit.Described field effect transistor Q2 is P channel-type; The drain electrode of described field effect transistor Q2 connects the common port of described second switch pipe circuit, and the source electrode of described field effect transistor Q2 connects the output of described second switch pipe circuit, and the grid of described field effect transistor Q2 connects the control end of described second switch pipe circuit.Described first bleeder circuit comprises the second resistance R2 and voltage stabilizing didoe D1; One end of described second resistance R2 connects the input of described first bleeder circuit, the other end of described second resistance R2 is connected with the feedback end of described first bleeder circuit respectively with the negative pole of described voltage stabilizing didoe D1, and the positive pole of described voltage stabilizing didoe D1 connects the output of described first bleeder circuit.Described second bleeder circuit comprises the first resistance R1 and the 4th resistance R4; One end of described first resistance R1 connects the input of described second bleeder circuit, the other end of described first resistance R1 is connected with the feedback end of described second bleeder circuit respectively with one end of described 4th resistance R4, and the other end of described 4th resistance R4 connects the output of described second bleeder circuit.
Further, described first bleeder circuit also comprises the 3rd resistance R3; The negative pole of described voltage stabilizing didoe D1 is connected with the feedback end of described first bleeder circuit by described 3rd resistance R3, and the 3rd resistance R3 plays metering function, reduces circuit to the specification requirement of described voltage stabilizing didoe D1.Described second bleeder circuit also comprises electric capacity C1; Described electric capacity C1 is in parallel with described first resistance R1.
Below the specific works principle of the anti-voltage pulse circuit that the present embodiment provides is described in detail:
The normal voltage that described DC voltage input end VCCIN inputs is 12V, pulse voltage is 90V, and described voltage-stabiliser tube D1 is 18V voltage-stabiliser tube.
When described DC voltage input end VCCIN inputs 12V normal voltage, namely input voltage is lower than the burning voltage U of described voltage stabilizing didoe D1
ztime, described voltage-stabiliser tube D1 does not play pressure stabilization function, the cathode voltage of described voltage-stabiliser tube D1 is 12V, and the described base stage of triode Q1 and the voltage of emitter are all 12V, then described triode Q1 disconnects, now, described first resistance R1 and the 4th resistance R4 dividing potential drop, make the grid voltage of described field effect transistor Q2 lower than source voltage, then described field effect transistor Q2 conducting, make described DC voltage input end VCCIN and described DC voltage output end OUT conducting, power supply normal power supply.
When described DC voltage input end VCCIN inputs 90V pulse voltage, namely input voltage is higher than the burning voltage U of described voltage stabilizing didoe D1
ztime, described voltage-stabiliser tube D1 plays pressure stabilization function, the cathode voltage of described voltage-stabiliser tube D1 is 18V, then described second resistance R2 and the 3rd resistance R3 dividing potential drop 72V, make the base voltage of described triode Q1 lower than emitter voltage, then described triode Q1 conducting, now, the grid of described field effect transistor Q2 is identical with source voltage, then described field effect transistor Q2 disconnects, and described DC voltage output end OUT no current is exported, power outage, thus play the effect cutting off pulse voltage, prevent potential pulse from damaging power consumption equipment.
It should be noted that, the burning voltage U of the normal voltage that the VCCIN of DC voltage input end described in the present embodiment inputs, pulse voltage and described voltage stabilizing didoe D1
zonly be described for 12V, 90V and 18V respectively, the burning voltage U of the normal voltage that described DC voltage input end VCCIN inputs, pulse voltage and described voltage stabilizing didoe D1
zcan also be other numerical value.In concrete enforcement, use the described voltage stabilizing didoe D1 of different burning voltage in this circuit, be applicable to different normal voltages and pulse voltage scope.
See Fig. 4, it is the structural representation of the 3rd embodiment of the anti-voltage pulse circuit that the utility model provides.
The anti-voltage pulse circuit that the present embodiment provides, compared with the second embodiment shown in Fig. 3, its difference is: described first switching tube circuit comprises field effect transistor Q1, and described second switch pipe circuit comprises triode Q2.Described field effect transistor Q1 is P channel-type; The drain electrode of described field effect transistor Q1 connects the common port of described first switching tube circuit, and the source electrode Q1 of described field effect transistor connects the output of described first switching tube circuit, and the grid of described field effect transistor Q1 connects the control end of described first switching tube circuit; Described triode Q2 is positive-negative-positive; The collector electrode of described triode Q2 connects the common port of described second switch pipe circuit, and the emitter of described triode Q2 connects the output of described second switch pipe circuit, and the base stage of described triode Q2 connects the control end of described second switch pipe circuit.
The operation principle of the present embodiment is identical with the second embodiment shown in Fig. 3, does not repeat them here.
The anti-voltage pulse circuit of the one that the utility model embodiment provides, when the electric current of DC voltage input end input normal voltage, second switch pipe circuit turn-on, DC voltage output end exports the electric current of normal voltage; When the potential pulse that DC voltage input end input is higher, second switch pipe circuit disconnects, DC voltage output end is output current not, thus the situation avoiding the higher infringement power consumption equipment of DC voltage output end output voltage occurs, and reaches the effect of anti-potential pulse.This circuit is not high to the specification requirement of electronic devices and components in circuit, so can adopt the electronic devices and components of low specification, make whole circuit small volume, cost is lower; When the potential pulse that DC voltage input end input is higher, DC voltage output end is output current not, there is not the situation that output voltage can exceed the normal working voltage of power consumption equipment, makes this circuit preventing electricity press the effect of pulse better; Higher potential pulse can not cause damage to the electronic devices and components in this circuit, makes the reliability of this circuit higher.
Below be only preferred implementation of the present utility model, it should be pointed out that above-mentioned preferred implementation should not be considered as restriction of the present utility model.Protection range of the present utility model should be as the criterion with claim limited range.For those skilled in the art, not departing from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. an anti-voltage pulse circuit, is characterized in that, comprises DC voltage input end, the first bleeder circuit, the first switching tube circuit, the second bleeder circuit, second switch pipe circuit and DC voltage output end;
The common port of described first switching tube circuit connects the feedback end of described second bleeder circuit, the output of described first switching tube circuit connects described DC voltage input end, and the control end of described first switching tube circuit connects the feedback end of described first bleeder circuit;
The common port of described second switch pipe circuit connects described DC voltage output end, and the output of described second switch pipe circuit connects described DC voltage input end, and the control end of described second switch pipe circuit connects the feedback end of described second bleeder circuit;
The input of described first bleeder circuit is connected with described DC voltage input end respectively with the input of described second bleeder circuit, the output of described first bleeder circuit and the output head grounding of described second bleeder circuit.
2. anti-voltage pulse circuit as claimed in claim 1, is characterized in that: described first switching tube circuit comprises triode, and described second switch pipe circuit comprises field effect transistor.
3. anti-voltage pulse circuit as claimed in claim 2, is characterized in that: described triode is positive-negative-positive; The collector electrode of described triode connects the common port of described first switching tube circuit, and the emitter of described triode connects the output of described first switching tube circuit, and the base stage of described triode connects the control end of described first switching tube circuit.
4. anti-voltage pulse circuit as claimed in claim 2, is characterized in that: described field effect transistor is P channel-type; The drain electrode of described field effect transistor connects the common port of described second switch pipe circuit, and the source electrode of described field effect transistor connects the output of described second switch pipe circuit, and the grid of described field effect transistor connects the control end of described second switch pipe circuit.
5. anti-voltage pulse circuit as claimed in claim 1, is characterized in that: described first switching tube circuit comprises field effect transistor, and described second switch pipe circuit comprises triode.
6. anti-voltage pulse circuit as claimed in claim 5, is characterized in that: described field effect transistor is P channel-type; The drain electrode of described field effect transistor connects the common port of described first switching tube circuit, and the source electrode of described field effect transistor connects the output of described first switching tube circuit, and the grid of described field effect transistor connects the control end of described first switching tube circuit;
Described triode is positive-negative-positive; The collector electrode of described triode connects the common port of described second switch pipe circuit, and the emitter of described triode connects the output of described second switch pipe circuit, and the base stage of described triode connects the control end of described second switch pipe circuit.
7. the anti-voltage pulse circuit as described in any one of claim 1-6, is characterized in that: described first bleeder circuit comprises the second resistance and voltage stabilizing didoe;
One end of described second resistance connects the input of described first bleeder circuit, the other end of described second resistance is connected with the feedback end of described first bleeder circuit respectively with the negative pole of described voltage stabilizing didoe, and the positive pole of described voltage stabilizing didoe connects the output of described first bleeder circuit.
8. anti-voltage pulse circuit as claimed in claim 7, is characterized in that: described first bleeder circuit also comprises the 3rd resistance; The negative pole of described voltage stabilizing didoe is connected with the feedback end of described first bleeder circuit by described 3rd resistance.
9. the anti-voltage pulse circuit as described in claim 1 or 8, is characterized in that: described second bleeder circuit comprises the first resistance and the 4th resistance;
One end of described first resistance connects the input of described second bleeder circuit, the other end of described first resistance is connected with the feedback end of described second bleeder circuit respectively with one end of described 4th resistance, and the other end of described 4th resistance connects the output of described second bleeder circuit.
10. anti-voltage pulse circuit as claimed in claim 9, is characterized in that: described second bleeder circuit also comprises electric capacity; Described electric capacity and described first resistor coupled in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520648228.1U CN204886132U (en) | 2015-08-25 | 2015-08-25 | Prevent voltage pulse circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520648228.1U CN204886132U (en) | 2015-08-25 | 2015-08-25 | Prevent voltage pulse circuit |
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| Publication Number | Publication Date |
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| CN204886132U true CN204886132U (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520648228.1U Active CN204886132U (en) | 2015-08-25 | 2015-08-25 | Prevent voltage pulse circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446707A (en) * | 2020-04-09 | 2020-07-24 | 上海电气集团股份有限公司 | Electric automobile power supply overvoltage's protection circuit and electric automobile |
-
2015
- 2015-08-25 CN CN201520648228.1U patent/CN204886132U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446707A (en) * | 2020-04-09 | 2020-07-24 | 上海电气集团股份有限公司 | Electric automobile power supply overvoltage's protection circuit and electric automobile |
| CN111446707B (en) * | 2020-04-09 | 2022-05-27 | 上海电气集团股份有限公司 | Electric automobile power supply overvoltage's protection circuit and electric automobile |
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| GR01 | Patent grant |