CN203193530U - Protection voltage-stabilized power supply with display - Google Patents
Protection voltage-stabilized power supply with display Download PDFInfo
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- CN203193530U CN203193530U CN 201320050742 CN201320050742U CN203193530U CN 203193530 U CN203193530 U CN 203193530U CN 201320050742 CN201320050742 CN 201320050742 CN 201320050742 U CN201320050742 U CN 201320050742U CN 203193530 U CN203193530 U CN 203193530U
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Abstract
The utility model provides a protection voltage-stabilized power supply with display, and belongs to the technical field of mechanical and electrical. A novel power supply is designed, comprising a rectification unit, an input overvoltage protection unit, voltage regulating and voltage stabilizing unit, an overcurrent protection and display unit. When overvoltage lightning stroke flow exists, the input overvoltage protection unit would not be short-circuit with a ground wire, and using a principle of being disconnected with the circuit, the power supply has better lightning protection effect. After implementation of the power supply, voltage stabilization effect is good, and lightning protection effect is obvious, and the power supply has an LED display function, thereby further improving development of power supplies.
Description
Technical field
Belong to the mechanical ﹠ electrical technology field.
Background technology
Lightning protection is one of the most significant problems that should note of electronic equipment, because this is the thing that a lot of applying electronic equipment must be faced, a lot of application products can not can at random be avoided with disconnected power down source being struck by lightning as ordinary electrical home appliance (as colour TV).
To the prevention of thunderbolt, what general electronic equipment adopted is to set up anti-thunder tube between rectification output end and ground wire, and when pressure was gushed in the thunderbolt generation, anti-thunder tube can suction through immediately, discharge over the ground, thus avoid gushing pressure to active infringement that causes.But this protection will have following some unsatisfied place, the one, and the protection breakdown voltage value of anti-thunder tube, more low more difficult seeking, and common integrated regulator input is example with 78 series, has only 30 volts, general anti-thunder tube protection puncture voltage all exceeds this value.The 2nd, the anti-thunder tube protection philosophy is the protection after puncturing, and rectification output end is produced short circuit, can bring the g-load of transient state rather than open-circuit condition to prime.If the imagination protection is the form that causes the open circuit of back level, obviously effect can be much better.
So the kind of power supply also needs innovation on the lightning protection means.
Summary of the invention
Task of the present invention and purpose are to propose a kind of novel lighning proof type power supply of design; this power supply does not produce the short path principle that shoves to ground wire when anti-lightning strike; but take principle with open circuit; thereby better lightning protection effect arranged; this new product also has wideer civil power accommodation simultaneously; and overcurrent protection etc. advantage, to adapt to the needs of a lot of electronic equipments, particularly be suitable for arbitrarily cutting off the power supply and the electronic product avoiding being struck by lightning.
The measure that the present invention adopts is:
1, the protection stabilized voltage power supply of band demonstration is made of jointly rectification unit, input Overvoltage protecting unit, voltage-regulation voltage-stabilization unit, overcurrent protection and display unit.
Wherein: rectification unit is: be made up of jointly the transformer bridge rectifier: be connected into the first rectification branch road with two diode D1, D2, be connected into the second rectification branch road with other two diode D3, D4, two ends with step down side, the series connection contact that has connected diode in two branch roads respectively, two positive terminal earth connections of the diode of two branch roads, diode two negative poles of two branch roads connect together, and export as rectification.
The voltage-regulation voltage-stabilization unit is made of with peripheral element jointly the pressure regulation triode: the pressure regulation transistor collector has been connected the output of rectification unit, the output of the rectification unit that has connected with an end of a resistance R 1, the other end of resistance R 1 has connected the pressure regulation transistor base, and this pipe base stage has also connected following two-way: first branch road is to have connected second voltage stabilizing didoe ground connection of connecting with resistance R 2; Second branch road is to connect overcurrent protection and display unit.
The input Overvoltage protecting unit is: be made up of jointly with circuits for triggering a protection triode: be connected the output of rectification unit with the positive pole of a voltage stabilizing didoe; negative pole has been connected after the resistance R 3; the base stage that has connected the protection triode; this manages grounded emitter, and this pipe collector has connected the base stage of pressure regulation triode.
Overcurrent protection and display unit are made up of with a resistance R 4 light-emitting diode: an end of this resistance R 4 has been connected the emitter of pressure regulation triode, and the other end of this resistance R 4 becomes the output of power supply; Be connected on the base stage of pressure regulation triode with the positive pole of a light-emitting diode, the negative pole of this light-emitting diode has connected the output of power supply.
2, first branch road that base stage connected of pressure regulation triode is parallel with a voltage stabilizing didoe, and the positive pole of voltage stabilizing didoe connects its minus earth of base stage of pressure regulation triode.
3, the light-emitting diode in overcurrent protection and the display unit is the high brightness luminescent pipe.
Above measure is explained as follows:
1, the cardinal principle of voltage stabilizing:
Pressure regulation triode pipe has adopted to be penetrated with output, and very strong negative feedback is arranged, in case after line parameter circuit value is determined, adjust pipe and just can be stabilized on the concrete numerical value, and this numerical value can satisfy the requirement of institute's distribution subset.
2, the reason that has good anti-thunderbolt effect: the one, at first have at the output of rectification and gush protection starting immediately when pressing, starting is fast.The 2nd, the means of dissolving are the back level to be adopted the mode of open circuit, can not be delivered to the back level so pressure is gushed in the thunderbolt of stopping, the 3rd, and active in the circuit has been adopted high countervoltage triode, has promoted the overvoltage protection index.Relevant principle analysis is as follows:
The first, this part is by the triggering part 103,104 in the accompanying drawing 1, " protection triode " 105, and complex function element 106 is formed jointly.
The protection philosophy that forms is:
Gush when pressing in thunderbolt not, the threshold voltage that the voltage of rectification output can breakdown triggering part voltage stabilizing didoe (accompanying drawing 103) is so " protection triode " is in cut-off state.Power supply is exported stable design voltage through after adjusting pipe (accompanying drawing 107) pressure regulation.
When causing rectification output end overvoltage voltage or serious overvoltage if be struck by lightning; can exceed the threshold voltage that triggers voltage stabilizing didoe (accompanying drawing 103); there is this moment electric current to flow into the base stage of protection triode; the protection triode will be in and amplify or saturation condition, exchange the base current shunting of homogeneous tube, and this pipe emitter-base bandgap grading output voltage is changed to reducing direction; form protection from face; overvoltage is more high, and output voltage is more little, so the dynamics of protection is more big.The resistance of connecting is the overcurrent protection that the protection transistor base is formed.
The automatic recovery of thunderbolt back protection system: thunderbolt back voltage recovers normal; the threshold voltage of the voltage stabilizing didoe of base loop that at this moment can not the breakdown protection triode; the protection triode reverts to cut-off state again automatically, and whole system reverts to the working condition that does not have overvoltage again.
The second, when overvoltage not, " protection triode " and peripheral element trigger voltage stabilizing didoe all be in by and open-circuit condition, only when thunderbolt or overvoltage, just rise just open-mindedly, so do not have " electrical wear " in normal condition, can not damage.Constantly all be in a kind of " armed state ".Guard mode.Reliable when having guaranteed protection takes place.
Three, the pressure regulation homogeneous tube is high inverse-voltage tube, has promoted lightning protection capability.
Its reason is, this pipe oppositely suctions through voltage usually at hundreds of volts, and 78 serial back-pressures are generally 30 volts.To exceed more than 10 times than 78 series commonly used.
Four, the base stage of surge pipe has " backup " voltage stabilizing didoe (in the accompanying drawing 2 115), forms three protections of overvoltage.Its reason is; when rectifier terminal thunderbolt is shoved when too high; the terminal voltage that base stage connects resistance in the branch road increases, and " backup " in parallel with causing voltage stabilizing didoe is open-minded, to the pressure limiting of surge pipe base stage; when overvoltage not; " backup " voltage stabilizing didoe is by the first branch road clamper, and no current passes through, and does not produce electrical wear; can not damage reliable when guaranteeing to protect.
3, form the overcurrent protection principle: when output current is excessive; adjust the resistance drop increase that the pipe emitter is connected; when surpassing certain value; diode current flow in the overcurrent protection branch road; flow into output voltage and adjust the base current minimizing of pipe; the load overcurrent is super many, and then the base current of Jian Shaoing is more many, forms automatically to exchange the homogeneous tube protection.
4, produce the reason of overcurrent protection indication: when forming overcurrent protection, base current is by light-emitting diode, and lamp is bright, and the LED light-emitting diode has played double action here, and the one, overcurrent protection kit, the 2nd, luminous indication.Advance it should be noted that together when debugging and should investigate into such situation, just often lamp does not work, and when fault was arranged, electric current was big and lamp is bright, and its benefit is to conclude whether fault is arranged by indicator light is whether shinny, namely being a kind of source of stable pressure thereby the present invention is become, also is a kind of monitor.
5, the reason that can not damage circuit in the higher place of civil power and period: be high inverse-voltage tube because adjusting pipe, although the voltage height of bridge-type output this moment, also can be far below the high inverse-voltage tube withstand voltage.
6, can be in the main cause of the lower place of civil power and period work: the one, the pressure regulation triode in the circuit, can not produce the additional electrical pressure drop, directly the bridge rectifier output voltage is adjusted into output voltage, namely be as long as bridge-type voltage is higher than output voltage, just can make triode work, just can voltage stabilizing.(illustrate: if the input voltage expansion scheme that adopts traditional triode to connect with three end integrated circuits, must three end integrated circuit operate as normal required voltages, also need the triode operating voltage simultaneously, main product has been given birth to triode supplementary loss voltage like this.Be when civil power is low, after bridge-type output must deduct this supplementary loss voltage, be only the input effective voltage of three end integrated circuits.And when civil power was low, this was valuable voltage.) it two is to be high inverse-voltage tube because adjusting pipe, so can design the bridge-type output voltage higherly when design, when civil power was low, at this moment bridge-type voltage can not be very low, just can do certain compensation.
7, can expand the reason of civil power excursion: owing to last two reasons, do not damage circuit when civil power is high, and still can operate as normal when low.So can expand the working range that civil power changes widely.
8, can adjust the reason of different output voltage stabilizing values.Because in reference voltage first branch road, the pressure drop of voltage stabilizing didoe is leading role, so can form coarse adjustment, and the shared ratio of the resistance of going here and there is very little, so also can do the usefulness of accurate adjustment, the benefit of accurate adjustment is can the furnishing normal voltage required to the storage battery floating charge, as 6.6 volts; 12.8 volt, etc.
Following significant advantage is arranged after the invention process:
1, anti-thunder and overvoltage protection are effective.Reason one is in thunderbolt during overvoltage, at first will start protection immediately gushing the first order rectification output of cutting down output living, and starting is sensitive; The 2nd, a protection that the back level is formed in when protection is to change to the open circuit direction, shoves when very big in thunderbolt, can not cause the infringement to prime; The 3rd, there is source protection highly sensitive; because the utmost point electrode load of protection triode namely is the last inclined to one side resistance of adjusting pipe, this numerical value is thousands of Europe, triggers door if overpressure value surpasses; the protection transistor base has electric current slightly, and this pipe becomes magnifying state or saturated immediately.The 4th, protection is big, shunts significantly because will exchange the homogeneous tube base current after the conducting of protection triode, until closing output end voltage fully.The 5th, form protection during overvoltage automatically, and after the transient state peak, recover automatically.So at thunderstorm season, institute's adapted equipment is difficult for damaging, and can not quit work because of thundery sky, if be used on security personnel's product, guaranteed that " security personnel " do not produce blank, this is with three traditional end integrated circuits or traditional triode and the co-design of three end integrated circuits, is difficult to realize.
2, the overcurrent protection indication being arranged, namely is a kind of source of stable pressure, is again a kind of prison examination device.When breaking down overcurrent protection being arranged, clear and definite luminous indication is arranged.This maintenance to " application product " is very beneficial, because " TV " these class household electrical appliances can just can be observed out easily in use, and to a lot of application products, as alarm, when emergency call is arranged, know just whether this equipment is normal, and after clearly indication has been arranged, just can know easily whether this equipment working state is correct.
3, adaptation is wide, than traditional stabilized voltage power supply wideer adaptive capacity is arranged, and at the voltage height that meets accident, can not damage.And also can operate as normal in voltage lower place and period.
4, available adjustment output is convenient to the floating charge of storage battery science for the voltage stabilizing value that decimal is arranged.Has overcurrent protection simultaneously.Be fruitful or other electronic products have excellent performance after supporting.
5, active not fragile, adjust triode and adopted high back-pressure high power valve, reliability is far above three end integrated circuits.The protection triode is in open-circuit condition often in no overpressure situation, does not produce electrical wear, the reliability when having guaranteed to need overvoltage protection.
6, the cost of the co-design of cost and traditional triode and three end integrated circuits does not increase substantially, and cheap more a lot of than a lot of professional stabilized voltage power supplys.
7, simple in circuits, benefit one are that out of order element is few, have improved reliability greatly, the 2nd, easily produce and debugging.
Description of drawings
Fig. 1 implements the most basic circuit diagram of measure of the present invention.
Among the figure: 101, step down side input; 103, the triggering voltage stabilizing didoe of band door; 104, protective resistance; 105, overvoltage protection triode; 106, inclined to one side resistance on the surge pipe; 107, adjust pipe; 108, output voltage accurate adjustment resistance; 109, output voltage coarse adjustment voltage stabilizing didoe; 110, diode that overcurrent protection is joined and demonstration light-emitting diode; 111, the supporting resistance of overcurrent protection; 112, power supply output.
Fig. 2 is the explanation schematic diagram of claim 3.
Among the figure: 101, step down side input; 103, the triggering voltage stabilizing didoe of band door; 104, protective resistance; 105, overvoltage protection triode; 106, inclined to one side resistance on the surge pipe; 107, adjust pipe; 108, output voltage accurate adjustment resistance; 109, output voltage coarse adjustment voltage stabilizing didoe; 110, diode that overcurrent protection is joined and demonstration light-emitting diode; 111, the supporting resistance of overcurrent protection; 112, power supply output; 115, the voltage stabilizing didoe that is parallel with of first branch road that base stage connected of pressure regulation triode.
Embodiment
1, surge pipe selects high back-pressure high power valve, light-emitting diode selects the high brightness type, if press Fig. 2 welding, then the voltage stabilizing value of 115 in the voltage stabilizing didoe accompanying drawing 2 should be higher than 108 109 voltages of being connected meanwhile, that is to say to be higher than power supply output voltage just often.
2, press the line map welding of Fig. 1 or Fig. 2.
3, adjust the power supply output valve.Adjusting pipe base stage voltage stabilizing didoe value namely is the coarse adjustment of output voltage, uses the resistance of going here and there as accurate adjustment, its rule be the voltage stabilizing didoe value more high output voltage is more high, resistance is more big, output voltage is more high, otherwise more low.
4, adjust the overvoltage protection parameter.The transformer primary side that breaks is connected on source of stable pressure output with oscillographic, clicks rectifier terminal with 100 volts direct voltages, and oscilloscope shows that output reduces to zero substantially by normal voltage, and after 100 volts high pressure removed, output voltage recovered normally.Otherwise should adjust the voltage stabilizing parameter value of the voltage stabilizing didoe (accompanying drawing 103) of the band door in the overvoltage protection transistor base loop.
5, adjust protection parameters.Connect the dummy load of " adjustable " at output, in the dummy load loop, adjust the load size with the ammeter string, ammeter numerical value is looked in sight, when numerical value reaches design value shown in the ammeter, continues the load resistance is reduced (namely being that power strengthens), this moment, current value no longer increased, and indicator light is bright.
Claims (3)
1. the protection stabilized voltage power supply of band demonstration is characterized in that: be made up of jointly rectification unit, input Overvoltage protecting unit, voltage-regulation voltage-stabilization unit, overcurrent protection and display unit;
Wherein: rectification unit is: be made up of jointly the transformer bridge rectifier: be connected into the first rectification branch road with two diode D1, D2, be connected into the second rectification branch road with other two diode D3, D4, two ends with step down side, the series connection contact that has connected diode in two branch roads respectively, two positive terminal earth connections of the diode of two branch roads, diode two negative poles of two branch roads connect together, and export as rectification;
The voltage-regulation voltage-stabilization unit is made of with peripheral element jointly the pressure regulation triode: the pressure regulation transistor collector has been connected the output of rectification unit, the output of the rectification unit that has connected with an end of a resistance R 1, the other end of resistance R 1 has connected the pressure regulation transistor base, and this pipe base stage has also connected following two-way: first branch road is to have connected second voltage stabilizing didoe ground connection of connecting with resistance R 2; Second branch road is to connect overcurrent protection and display unit;
The input Overvoltage protecting unit is: be made up of jointly with circuits for triggering a protection triode: be connected the output of rectification unit with the positive pole of a voltage stabilizing didoe, negative pole has been connected after the resistance R 3, the base stage that has connected the protection triode, this manages grounded emitter, and this pipe collector has connected the base stage of pressure regulation triode;
Overcurrent protection and display unit are made up of with a resistance R 4 light-emitting diode: an end of this resistance R 4 has been connected the emitter of pressure regulation triode, and these resistance R 4 other ends become the output of power supply; Be connected on the base stage of pressure regulation triode with the positive pole of a light-emitting diode, the negative pole of this light-emitting diode has connected the output of power supply.
2. the protection stabilized voltage power supply that shows of band according to claim 1, it is characterized in that: first branch road that base stage connected of pressure regulation triode is parallel with a voltage stabilizing didoe, and the positive pole of voltage stabilizing didoe connects its minus earth of base stage of pressure regulation triode.
3. the protection stabilized voltage power supply that shows of band according to claim 1, it is characterized in that: the light-emitting diode in overcurrent protection and the display unit is the high brightness luminescent pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320050742 CN203193530U (en) | 2013-01-30 | 2013-01-30 | Protection voltage-stabilized power supply with display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320050742 CN203193530U (en) | 2013-01-30 | 2013-01-30 | Protection voltage-stabilized power supply with display |
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| CN203193530U true CN203193530U (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320050742 Expired - Fee Related CN203193530U (en) | 2013-01-30 | 2013-01-30 | Protection voltage-stabilized power supply with display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103687208A (en) * | 2013-11-29 | 2014-03-26 | 孙爱玲 | LED overcurrent protection circuit |
| CN107046378A (en) * | 2017-04-06 | 2017-08-15 | 哈尔滨理工大学 | A kind of two-way Z sources three-level inverter |
-
2013
- 2013-01-30 CN CN 201320050742 patent/CN203193530U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103687208A (en) * | 2013-11-29 | 2014-03-26 | 孙爱玲 | LED overcurrent protection circuit |
| CN107046378A (en) * | 2017-04-06 | 2017-08-15 | 哈尔滨理工大学 | A kind of two-way Z sources three-level inverter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 Termination date: 20140130 |