CN204856278U - N type three -terminal monitoring protective power supply - Google Patents
N type three -terminal monitoring protective power supply Download PDFInfo
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- CN204856278U CN204856278U CN201520611369.6U CN201520611369U CN204856278U CN 204856278 U CN204856278 U CN 204856278U CN 201520611369 U CN201520611369 U CN 201520611369U CN 204856278 U CN204856278 U CN 204856278U
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Abstract
N type three -terminal monitoring protective power supply belongs to electron technical field, and by arrester, protection circuit, three -terminal voltage stabilizing circuit, output excessive pressure monitoring starting circuit constitute. The thunderbolt has possessed triple protections with unexpected excessive pressure, the arrester connects between rectified output and ground wire, it gushes the thunderbolt and presses leading -in ground, it heavily protects to form one, protection triode in the protection circuit of three -terminal voltage stabilizing circuit input is high -power triode, the back pressure value is three -terminal voltage stabilizing circuit's tens of hundred, therefore the formation second is heavily protected, the special resistance that protection triode base connect, spare stabilivolt, prevent gushing and press capacitance parallel connection to design, once more to the voltage limiting of protection triode base, it heavily protects to form the third. Output excessive pressure monitoring starting circuit monitor three -terminal voltage stabilizing circuit, if three -terminal voltage stabilizing circuit damage to make output voltage too high, three -terminal voltage stabilizing circuit's input power is closed to the protection triode that breaks immediately, forms the power -off protection. Improve constant voltage power supply's performance, make the development that the power can be brand -new.
Description
Technical field
Belong to electronic technology field.
Background technology
Power supply is a not only ancient but also fresh topic, because the today of development of making rapid progress in electronic technology, technology, in continuous renewal, needs the new power of the needs adapting to various development.So the research to power supply, it is the emphasis of society research always.
Source of stable pressure is the important ingredient of electronic product, and the excellence of its performance is directly connected to overall performance, so there is much outstanding stabilized voltage supply integrated circuit at present, as 78 series, and 79 series etc.Although these integrated series above-mentioned have many good qualities, it is the needs that a kind of mu balanced circuit of popular style still can not meet current electronic product and makes rapid progress.Particularly input terminal voltage can not be too high, more than 36V, once overvoltage, will be able to not damage.This stabilized voltage supply receiving to favor greatly, if overvoltage capabilities is not strong, input terminal voltage suddenly rises, and the high voltage risen suddenly is easy to damage source element, if supporting electronic equipment is security personnel's series products, the consequence of generation is very serious.And once damage, some device power supply (DPS)s are contained in a machine box, and some electronic equipments are difficult to find specialized maintenance point, and this just causes the problem of maintenance difficult.
The power supply of three-terminal voltage-stabilizing is if three ends receive damage, how to learn, if can not learn, the consequence produced is that the output end voltage raised suddenly can make device damage, if can monitor three ends at any time, learning in time in 3 damaged on end bad times, process in time, is a much progress of power source products performance, but which type of circuit just can be accomplished, this is also the emphasis of a research.
Exactly because these reasons; so electronic equipment just can be more and more higher to the requirement of power supply; and the ideal source of the electronic equipment especially of the power supply with protective nature, because the serviceability that electronic equipment is good more can be ensured, thus very necessary to the lifting of power supply.
Therefore to address these problems, reach and no longer need power-off to carry out protective device, when there being overpressure situation at thundery sky; also no longer worry can damage the object of power supply, must carry out systematic research, need the support of multiple technologies; need the mode of thinking of innovation; because it should consider energy voltage stabilizing, again when there being overvoltage, energy is starting protection in time; so; it must break through the mode of traditional mu balanced circuit, finds new direction, could realize.
Summary of the invention
Fundamental purpose of the present invention is, designs a kind of power supply of protective nature, uses the high back-pressure character of triode; can not the performance of transition in conjunction with electric capacity; when being struck by lightning overvoltage, forming overvoltage protection, can not power supply be damaged; form monitoring at the output terminal of three-terminal voltage-stabilizing circuit simultaneously; when three-terminal voltage-stabilizing circuit damages, energy is powered-down rapidly, forms protection; improve the performance of stabilized voltage supply, make the development that power supply can be brand-new.
The measure that the present invention adopts:
1, N-type three end monitoring and protecting power supply is by lightning arrester, protection circuit, three-terminal voltage-stabilizing circuit, output terminal overvoltage monitoring start-up circuit composition.
Wherein: lightning arrester is connected between rectification output and ground wire.
Protection circuit is by protecting triode, upper inclined divider resistance, lower inclined divider resistance, backup protection stabilivolt, and anti-voltage capacitance of gushing forms.
Upper inclined divider resistance is connected between protection transistor base and collector; between the base stage that lower inclined divider resistance is connected on protection triode and ground wire; backup protection stabilivolt is in parallel with lower inclined divider resistance; the anti-end gushing voltage capacitance is connected on the base stage of protection triode; other end ground wire; the collector of protection triode connects rectification and exports, and emitter connects the input end of three-terminal voltage-stabilizing circuit.
The earth terminal ground wire of three-terminal voltage-stabilizing circuit, namely the output terminal of three-terminal voltage-stabilizing circuit is the output terminal of N-type three end monitoring and protecting power supply.
Output terminal overvoltage monitoring start-up circuit is by door stabilivolt, start diode, integrating capacitor, monitoring pilot lamp, starting resistance, start triode, clamp diode forms: between the output terminal that door stabilivolt and startup diode are serially connected in three-terminal voltage-stabilizing circuit and the positive pole of integrating capacitor, monitoring pilot lamp and starting resistance are serially connected between the positive pole of integrating capacitor and the base stage starting triode, the minus earth line of integrating capacitor, start the grounded emitter line of triode, the positive pole of clamp diode connects the base stage of protection triode, the negative pole of clamp diode connects the collector starting triode.
2, the partial pressure value that upper inclined divider resistance and lower inclined divider resistance are formed should 5V or 6V lower than the maximum voltage value 36V of three-terminal voltage-stabilizing circuit input end.
3, the power of backup protection stabilivolt is 1W.
4, protect the back-pressure value >=150V of triode, the back-pressure value starting triode is not less than 80V.
Above measure is explained as follows:
1, N-type three end monitoring and protecting power supply is by lightning arrester, protection circuit, three-terminal voltage-stabilizing circuit, output terminal overvoltage monitoring start-up circuit composition.Possessed lightning arrester, backup stabilivolt, the triple anti-lightning strike stabilized voltage supply of gushing pressure and unexpected overvoltage protection of protection triode; and three-terminal voltage-stabilizing circuit is monitored; make output voltage too high if three-terminal voltage-stabilizing circuit damages; break three-terminal voltage-stabilizing circuit input voltage immediately, forms the power-off protection to three-terminal voltage-stabilizing circuit and equipment.Improve the performance of stabilized voltage supply, make the development that power supply can be brand-new.
2, first of lightning protection heavily protection be that rectification output end is connected to lightning arrester over the ground, when having thunderbolt, it shoves and will enter rapidly ground, forms the protection of the lightning protection first order.Protection triode due to protected level is NPN triode, and its back-pressure value can be 400 volts, the input end of the general three-terminal voltage-stabilizing circuit (can not more than 36V), so form double protection.Because the protection circuit in this measure have employed special resistance, backup stabilivolt, prevents gushing voltage capacitance Parallel Design, pressure can be gushed by inrush current prevention, guarantee that base stage can not export higher voltage, so form triple protection.
3, the protection philosophy of protection circuit is: be divided into a fixed voltage by upper inclined divider resistance (3 in Fig. 1) and the lower inclined divider resistance (6 in Fig. 1) of this grade; this voltage should higher than the input voltage of three-terminal voltage-stabilizing circuit (12 in Fig. 1); when normal civil power; two electric resistance partial pressures export by protecting the emitter of triode (5 in Fig. 1), and larger output can be provided to supply the needs of three-terminal voltage-stabilizing circuit.
The voltage stabilizing value of the backup stabilivolt (in Fig. 1 8) in parallel with lower inclined divider resistance, higher than the partial pressure value of upper inclined divider resistance and lower inclined divider resistance, so the not conducting of backup stabilivolt, becomes the Status of Backups that no current passes through.So not fragile, in practice, the reliability of resistance far above active stabilivolt, will have electric current to pass through with lower inclined divider resistance branch road so just upper, but is not easy the damage causing resistance partially.Output due to this grade is the input of the third level, so the output of this grade does not need accurate voltage regulation result, as long as just can in a larger interval met needed for three-terminal voltage-stabilizing circuit, backup stabilivolt in parallel, actual effect is pressure limiting, if hit or civil power unexpected too high time, to ensure that the input of three-terminal voltage-stabilizing circuit can not overvoltage.And also have an anti-voltage capacitance (7 in Fig. 1) of gushing in parallel with it; anti-effect of gushing voltage capacitance is; when pressure situation is gushed in a flash in generation; because electric capacity can not transition, therefore, it makes the base stage of protection triode still be in voltage stabilizing value; so the benefit one of design is like this; under civil power normal condition, meet the input requirements needed for three-terminal voltage-stabilizing circuit, and thus three-terminal voltage-stabilizing circuit overvoltage can not there is good protective effect when accident.Two is because easy failed part backup stabilivolt no power at ordinary times, so not fragile.
Upper inclined divider resistance should 5V or 6V lower than the maximum voltage value 36V of three-terminal voltage-stabilizing circuit input end with the partial pressure value that lower inclined divider resistance is formed.And the partial pressure value that the voltage stabilizing value of backup protection stabilivolt should be formed than upper inclined divider resistance and lower inclined divider resistance is high, lower than the maximum input voltage of three-terminal voltage-stabilizing circuit.So can form above-mentioned situation, at ordinary times, backup protection stabilivolt is idle; but but the input voltage of three-terminal voltage-stabilizing circuit can be provided, three-terminal voltage-stabilizing circuit can normally be worked, only when overvoltage; overvoltage crowbar starts, and thus can not damage three-terminal voltage-stabilizing circuit.
4, monitoring and the principle of overvoltage protection are formed to three-terminal voltage-stabilizing circuit: by door stabilivolt (13 in Fig. 1, start 15 in diode Fig. 1), integrating capacitor (17 in Fig. 1), monitor pilot lamp (16 in Fig. 1), starting resistance (18 in Fig. 1), start triode (19 in Fig. 1), clamp diode (20 in Fig. 1) forms.Form monitoring three-terminal voltage-stabilizing circuit, the effect that formation fast tripping protection and light are warned after three-terminal voltage-stabilizing circuit damages.
A, when three-terminal voltage-stabilizing circuit damage; output end voltage is caused to increase; if exceeded the voltage stabilizing value of door stabilivolt, immediately to integration capacitor charging, after integrating capacitor is full of electricity; start triode saturated; while forming light warning, the base stage of clamper protection triode, makes the emitter of protection triode no longer include output; thus three-terminal voltage-stabilizing circuit is broken input, and then form protection.
The effect played and monitor and indicate is not only in the effect of B, monitoring pilot lamp and protective resistance, and yet forms both the time constant of integrating capacitor electric discharge, discharge time is long, then the time starting triode effect is longer, and the time forming quick-break is also longer, otherwise then short.
C, damage if there is this three-terminal voltage-stabilizing circuit after situation about not processing; so when after integrating capacitor discharge off; protection triode recovers; door stabilivolt is again to integration capacitor charging; again make startup triode saturated; if do not processed always, so this situation can circulate always, until processed the fault of three-terminal voltage-stabilizing circuit.
Following significant advantage is had after the invention process:
Power supply is the most important elementary cells of all electronic circuits, and all electronic equipments all need reliable and stable power supply.A kind of quality of electronic equipment is directly relevant with power supply.Power source performance is good, then overall performance is good.Power supply is also usually flimsy Focusing on components, and the infringement that thunderbolt and overvoltage cause is one of main source of fault, so reducing the stabilized voltage supply of this failure rate, is very significant.
And enforcement of the present invention has positive meaning.Advantage is as follows:
1, source of stable pressure voltage regulation result is good.Can provide stable voltage, because this circuit is three end integrated stable voltage circuits, this circuit is a kind of outstanding integrated regulator, and voltage regulation result is good, and again containing multiple protection, so be a kind of outstanding mu balanced circuit.
2, reliable operation, one is three-terminal voltage-stabilizing collector is a kind of integrated stable voltage circuit of maturation, reliable operation.Two is that the element of protection circuit is made up of large power triode and peripheral element, also belongs to ripe device, and three is that the periphery circuit of protection circuit is simplified, so failure condition is few.
3, possessed effect of triple lightning protection anti-over voltage, one heavily protection be the lightning arrester that rectification output end connects, when there being thunderbolt, it shoves and will enter rapidly ground, forms the protection of the lightning protection first order.Protection triode due to protected level is NPN triode, and its back-pressure value can be 400 volts, the input end of the general three-terminal voltage-stabilizing circuit (can not more than 36V), so form double protection.Protection circuit have employed special resistance, backup stabilivolt, prevents gushing voltage capacitance Parallel Design, can gush pressure by inrush current prevention, guarantee that base stage can not export higher voltage, so form triple protection.
4, carried out tracking and monitoring at every moment to three-terminal voltage-stabilizing circuit, once three-terminal voltage-stabilizing circuit damages, start output terminal overvoltage monitoring start-up circuit immediately, the protection triode of clamper three-terminal voltage-stabilizing circuit input end, forms the protection of power-off.
5, cost is low, easily produces and debugging.
Accompanying drawing explanation
Fig. 1 is N-type three end monitoring and protecting power circuit diagram.
In figure: 1, rectification exports; 2, lightning arrester; 3, upper inclined divider resistance; 5, triode is protected; 6, lower inclined divider resistance; 7, prevent gushing voltage capacitance; 8, backup protection stabilivolt; 12, three-terminal voltage-stabilizing circuit; 13, door stabilivolt; 15, diode is started; 16, pilot lamp is monitored; 17, integrating capacitor; 18, starting resistance; 19, triode is started; 20, clamp diode; 22, the output of N-type three end monitoring and protecting power supply.
By the analogy method figure of output voltage rising when Fig. 2 is debugging three end integrated stable voltage circuit.
In figure: 12, three-terminal voltage-stabilizing circuit; 12.1, the upper inclined resistance newly increased; 12.2, the lower inclined resistance newly increased; 12.3, voltage table; 22, the output of N-type three end monitoring and protecting power supply.
Embodiment
Fig. 1, Fig. 2 are the physical circuit connected modes of N-type three end monitoring and protecting power supply.
1, option: protection triode (5 in Fig. 1) is the high-power NPN triode of high back-pressure, back-pressure value >=150V.Upper inclined divider resistance (3 in Fig. 1) should 5V or 6V lower than the maximum voltage value 36V of three-terminal voltage-stabilizing circuit (8 in figure) input end with the partial pressure value that lower inclined divider resistance (6 in Fig. 1) is formed.Start the back-pressure value >=80V of triode (19 in Fig. 1).
2, weld: N-type three end monitoring and protecting power supply welds by the wiring diagram of Fig. 1.
N-type three end monitoring and protecting power supply is by lightning arrester, protection circuit, and three-terminal voltage-stabilizing circuit, output terminal overvoltage monitoring start-up circuit form.
Wherein: lightning arrester (2 in Fig. 1) is connected on rectification and exports between (1 in Fig. 1) and ground wire.
Protection circuit is by protecting triode (5 in Fig. 1), upper inclined divider resistance (3 in Fig. 1), lower inclined divider resistance (6 in Fig. 1), backup protection stabilivolt (8 in Fig. 1), and anti-voltage capacitance (7 in Fig. 1) of gushing forms.
Upper inclined divider resistance (3 in Fig. 1) is connected on protection triode (5 in Fig. 1) between base stage and collector, between the base stage that lower inclined divider resistance (6 in Fig. 1) is connected on protection triode (5 in Fig. 1) and ground wire, backup protection stabilivolt (8 in Fig. 1) is in parallel with lower inclined divider resistance (6 in Fig. 1), the anti-end gushing voltage capacitance (7 in Fig. 1) is connected on the base stage of protection triode (5 in Fig. 1), other end ground wire, the collector of protection triode (5 in Fig. 1) connects rectification and exports (1 in Fig. 1), emitter connects the input end of three-terminal voltage-stabilizing circuit (12 in Fig. 1).
The earth terminal ground wire of three-terminal voltage-stabilizing circuit (12 in Fig. 1), namely the output terminal of three-terminal voltage-stabilizing circuit is the output terminal (22 in Fig. 1) of N-type three end monitoring and protecting power supply.
Output terminal overvoltage monitoring start-up circuit is by door stabilivolt (13 in Fig. 1), start diode (15 in Fig. 1), integrating capacitor (17 in Fig. 1), monitoring pilot lamp (16 in Fig. 1), starting resistance (18 in Fig. 1), start triode (19 in Fig. 1), clamp diode (20 in Fig. 1) forms: door stabilivolt (13 in Fig. 1) and startup diode (15 in Fig. 1) are serially connected between the output terminal of three-terminal voltage-stabilizing circuit (12 in Fig. 1) and the positive pole of integrating capacitor (17 in Fig. 1), monitoring pilot lamp (16 in Fig. 1) and starting resistance (18 in Fig. 1) are serially connected between the positive pole of integrating capacitor (17 in Fig. 1) and the base stage starting triode (19 in Fig. 1), the minus earth line of integrating capacitor (17 in Fig. 1), start the grounded emitter line of triode (19 in Fig. 1), the positive pole of clamp diode (20 in Fig. 1) connects the base stage of protection triode (5 in Fig. 1), the negative pole of clamp diode (20 in Fig. 1) connects the collector starting triode (19 in Fig. 1).
3, adjust: the input terminal voltage value of A, adjustment three-terminal voltage-stabilizing circuit: the input end connecing three-terminal voltage-stabilizing circuit with the red test pencil of multimeter, black meter pen ground wire, magnitude of voltage should between 25V to 30V, if no-voltage, the resistance of inclined divider resistance (3 in Fig. 1) and lower inclined divider resistance (6 in Fig. 1) in adjustment.
B, adjustment overvoltage protection parameter: the output terminal (22 in Fig. 1) being connected on N-type three end monitoring and protecting power supply with oscillographic hot junction; click rectification by the DC voltage of 100 volts and export (1 in Fig. 1); oscilloscope display exports and should be normal voltage, otherwise should debug backup protection stabilivolt (8 in figure).
4, to three-terminal voltage-stabilizing circuit output end overvoltage monitoring and the detection protected and debugging.
The starting value of adjustment door voltage stabilizing.
The output terminal of three-terminal voltage-stabilizing circuit is measured with voltage table.Determine the overvoltage threshold voltage of output terminal, as higher than normal voltage stabilizing value 10% volt, protection act.
Namely A, the impaired situation of simulation three-terminal voltage-stabilizing circuit are that after simulation damages, output voltage increases .(see Fig. 2)
Method disconnects three-terminal voltage-stabilizing circuit ground end, and the lower inclined resistance that a resistance of connecting between this end with ground is namely newly-increased, be connected the namely newly-increased upper inclined resistance of another resistance at three-terminal voltage-stabilizing circuit ground end with output terminal simultaneously, at this moment the voltage of output terminal can improve, adjust the value of two resistance, as the resistance of newly-increased lower inclined resistance is increased, (maybe the resistance of upper inclined resistance being reduced), the voltage allowing the output terminal of three-terminal voltage-stabilizing circuit increase reaches desirable value, as 10%.At this moment voltage table is designated as high as 10% voltage.
B, when output voltage overvoltage, exceed the voltage stabilizing value of door stabilivolt (13 in Fig. 1), integrating capacitor (17 in Fig. 1) is charged immediately, after integrating capacitor is full of electricity, start triode (19 in Fig. 1) saturated, monitoring pilot lamp (16 in Fig. 1) is bright, surveys with the voltage gear of multimeter the current collection very low level starting triode.
The lower inclined resistance that short circuit is newly-increased, now monitoring pilot lamp is still bright.
If survey output voltage with multimeter have overvoltage; and monitor pilot lamp and do not work; then detect integrating capacitor and whether have electricity; if nothing; then represent that door stabilivolt (13 in Fig. 1) has sealing-off with the series connection starting diode (15 in Fig. 1) or has element to weld instead; if there is voltage, then show that monitoring pilot lamp (16 in Fig. 1) damages or protective resistance (19 in Fig. 1) is not welded.
Now survey the output terminal no-voltage of N-type three end monitoring and protecting power supply.
When integrating capacitor discharge off, three-terminal voltage-stabilizing circuit takes back former state, and be namely that two newly-increased resistance in Fig. 2 remove, three-terminal voltage-stabilizing circuit recovers output voltage again.
Claims (4)
1.N type three end monitoring and protecting power supply, is characterized in that: by lightning arrester, protection circuit, three-terminal voltage-stabilizing circuit, output terminal overvoltage monitoring start-up circuit composition;
Wherein: lightning arrester is connected between rectification output and ground wire;
Protection circuit is by protecting triode, upper inclined divider resistance, lower inclined divider resistance, backup protection stabilivolt, and anti-voltage capacitance of gushing forms;
Upper inclined divider resistance is connected between protection transistor base and collector, between the base stage that lower inclined divider resistance is connected on protection triode and ground wire, backup protection stabilivolt is in parallel with lower inclined divider resistance, the anti-end gushing voltage capacitance is connected on the base stage of protection triode, other end ground wire, the collector of protection triode connects rectification and exports, and emitter connects the input end of three-terminal voltage-stabilizing circuit;
The earth terminal ground wire of three-terminal voltage-stabilizing circuit, namely the output terminal of three-terminal voltage-stabilizing circuit is the output terminal of N-type three end monitoring and protecting power supply;
Output terminal overvoltage monitoring start-up circuit is by door stabilivolt, start diode, integrating capacitor, monitoring pilot lamp, starting resistance, start triode, clamp diode forms: between the output terminal that door stabilivolt and startup diode are serially connected in three-terminal voltage-stabilizing circuit and the positive pole of integrating capacitor, monitoring pilot lamp and starting resistance are serially connected between the positive pole of integrating capacitor and the base stage starting triode, the minus earth line of integrating capacitor, start the grounded emitter line of triode, the positive pole of clamp diode connects the base stage of protection triode, the negative pole of clamp diode connects the collector starting triode.
2. N-type three end monitoring and protecting power supply according to claim 1, is characterized in that: upper inclined divider resistance should 5V or 6V lower than the maximum voltage value 36V of three-terminal voltage-stabilizing circuit input end with the partial pressure value that lower inclined divider resistance is formed.
3. N-type three end monitoring and protecting power supply according to claim 1, is characterized in that: the power of backup protection stabilivolt is 1W.
4. N-type three end monitoring and protecting power supply according to claim 1, is characterized in that: the back-pressure value >=150V of protection triode, the back-pressure value starting triode is not less than 80V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520611369.6U CN204856278U (en) | 2015-08-14 | 2015-08-14 | N type three -terminal monitoring protective power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520611369.6U CN204856278U (en) | 2015-08-14 | 2015-08-14 | N type three -terminal monitoring protective power supply |
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| CN204856278U true CN204856278U (en) | 2015-12-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595029A (en) * | 2021-07-30 | 2021-11-02 | 苏州极目机器人科技有限公司 | Input/output protection circuit |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595029A (en) * | 2021-07-30 | 2021-11-02 | 苏州极目机器人科技有限公司 | Input/output protection circuit |
| CN113595029B (en) * | 2021-07-30 | 2024-05-17 | 苏州极目机器人科技有限公司 | Input/output protection circuit |
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Granted publication date: 20151209 Termination date: 20170814 |