CN203911752U - Protective display power source used for rectification terminal - Google Patents

Protective display power source used for rectification terminal Download PDF

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Publication number
CN203911752U
CN203911752U CN201420270286.0U CN201420270286U CN203911752U CN 203911752 U CN203911752 U CN 203911752U CN 201420270286 U CN201420270286 U CN 201420270286U CN 203911752 U CN203911752 U CN 203911752U
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China
Prior art keywords
voltage
triode
connects
adjustment
resistance
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Expired - Fee Related
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CN201420270286.0U
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Chinese (zh)
Inventor
宁永重
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Chongqing Ninglai Science and Trade Co Ltd
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Chongqing Ninglai Science and Trade Co Ltd
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Publication of CN203911752U publication Critical patent/CN203911752U/en
Expired - Fee Related legal-status Critical Current
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Abstract

A protection display power source used for a rectification terminal belongs to the field of dynamo-electric technology and is composed of a rectification output terminal protection unit, a voltage-stabilizing modulating unit, an over-current display unit, a DC charge-discharge unit, a balance diode. A floating charge voltage required by the DC charge-discharge unit and obtained through the modulation of the voltage-stabilizing modulating unit is output through rectification and is then reduced to a voltage required by a device through the balance diode. The power source provided by the utility model has a function of displaying over-current input. When over-current occurs, the over-current display unit is switched on immediately, gives out light to get people informed of related equipment failure and enlarges current for making convenience for emergency treatment. Lightning protection effect and over-voltage prevention capability are also enhanced. When lightning occurs, voltage of the rectification output terminal is increased and the rectification output terminal protection unit is started immediately. A method of opening rear-stage circuits is adopted, so that lightning surge voltage is prevented from being transmitted to the rear-stage circuits and equipment power failure in thundery days is avoided and good working performance of equipment in all conditions is guaranteed.

Description

A kind of rectifier terminal protection type display power supply
Technical field
Belong to mechanical & electrical technology field.
Background technology
Thunder; the power supply of equipment of breaking has become a kind of important way that average family protection equipment is not struck by lightning, and this mode is reliable, needn't worry to be struck by lightning again in disconnected power down source; this is very suitable to some common families; but for some special installations, this mode is but also inapplicable, if security personnel's product; because security personnel's product is round-the-clock awaiting orders; once power-off, ensures public security ineffective, the consequence of generation is very serious.
To the prevention of thunderbolt, what general electronic equipment adopted is to set up anti-thunder tube between rectification output end and ground wire, gushes while pressing when thunderbolt produces, and anti-thunder tube can suction through immediately, electric discharge over the ground, thus avoiding gushing presses the infringement causing active.But this protection will have following some unsatisfied place, the one, withstand voltage low anti-thunder tube is extremely hard to buy, and only has 30 volts with the integrated regulator input terminal voltage headed by 78 general series, and general anti-thunder tube protection puncture voltage all exceeds this value.The 2nd, anti-thunder tube protection philosophy is the protection after puncturing, and rectification output end is produced to short circuit, can bring the g-load of transient state to prime, instead of open-circuit condition.Therefore the performance of power supply also needs further lifting in lightning protection means.
Summary of the invention
In order to strengthen the effect of lightning protection; main purpose of the present invention is a kind of Novel lightning-proof type power supply of design; adopt the open-circuit-protection of rectification output end formula; strengthen lightning protection properties; there is wider civil power accommodation simultaneously; and overcurrent protection etc., allow the thundery sky power down source of needn't breaking again carry out protection equipment, allow equipment at any time all keep good service behaviour in any location.
The measure that the present invention adopts is
1, a kind of rectifier terminal protection type display power supply is made up of jointly rectification output end protected location, voltage stabilizing adjustment unit, overcurrent display unit, direct current charge/discharge unit, balance diode.
Wherein: rectification input protected location is: the positive pole of overvoltage door voltage-stabiliser tube connects rectification output; the negative pole of overvoltage door diode connects the termination, one side of overvoltage protection resistance; the another side termination of overvoltage protection resistance connects the base stage of overvoltage protection triode; the grounded emitter line of overvoltage protection triode, the collector electrode of overvoltage protection triode connects the base stage of voltage adjustment triode.
Upper inclined to one side resistance and pressure-adjustable branch road that voltage stabilizing adjustment unit is adjusted triode, voltage adjustment triode by voltage form; Voltage is adjusted the collector electrode connection rectification output of triode, and one of the upper inclined to one side resistance that voltage is adjusted triode connects rectification output, and other end connection voltage is adjusted the base stage of triode, and the base stage that voltage is adjusted triode has connected pressure-adjustable branch road to ground wire; Pressure-adjustable branch road is the base stage that the positive pole of voltage adjustment voltage-stabiliser tube is connected to voltage adjustment triode, after an accurate adjustment resistance of negative pole series connection, arrives ground wire.
Overcurrent display unit is: after an overcurrent protection resistance of emitter series connection of voltage adjustment triode, to floating charge point, overcurrent shows that the positive pole of luminous tube connects the base stage of voltage adjustment triode, and overcurrent protection shows that the negative pole of luminous tube connects floating charge point.
Direct current charge/discharge unit: the upper one end that connects a floating charge protective resistance of floating charge point; the other end of floating charge protective resistance connects two-way; one tunnel is to have connected storage battery; another road connects the emitter of discharge diode; the base stage of discharge diode has connected two-way, and a road connects base stage controlled resistor to ground wire, and another road connects the negative pole of a rectification control diode; the positive pole of rectification control diode connects rectification output, and the collector electrode of discharge diode becomes voltage output end as output.
Balance diode is to be in series by three diodes, and the positive pole of balance diode connects floating charge point, and negative pole becomes voltage output end.
2, voltage is adjusted voltage-stabiliser tube series connection accurate adjustment resistance can also increase the coarse adjustment of two diodes as voltage, and its form is that voltage is adjusted two coarse adjustment diodes of voltage-stabiliser tube series connection and gone here and there after accurate adjustment resistance to ground wire again.
3, the base stage connected pressure-adjustable branch circuit parallel connection of voltage adjustment triode has a backup voltage-stabiliser tube, and the positive pole of voltage-stabiliser tube connects the base stage of voltage adjustment triode, the minus earth of voltage-stabiliser tube.
4, discharge diode is selected the withstand voltage PNP triode for 100V.
Above measure is explained as follows:
One, the cardinal principle of voltage stabilizing:
1, voltage adjustment triode (3) is NPN triode, adopt the form of penetrating with output, as long as voltage is adjusted the base voltage of triode and is fixed, its emitter voltage also becomes a definite value, only, than the few 0.7V of base voltage, can meet the requirement of direct current charge/discharge unit and equipment required voltage.
2, the pressure-adjustable that voltage adjustment transistor base connects props up routing voltage and adjusts voltage-stabiliser tube (5) series connection accurate adjustment resistance (6) formation, it is a definite value that voltage is adjusted voltage-stabiliser tube (5), and the accurate adjustment resistance (6) of connecting is to adjust the magnitude of voltage that is less than 0.7V, also two diodes of connecting again described in available measure 2 are as coarse adjustment, and the value of diode is 0.7V, more convenient debugging.
3, the resistance of the upper inclined to one side resistance (4) of voltage adjustment triode is larger, and the load that voltage adjustment triode can be with is less, otherwise resistance is less, and the load that voltage adjustment triode can be with is larger.
4, the pressure-adjustable branch circuit parallel connection described in measure 3 has a voltage-stabiliser tube, and this voltage-stabiliser tube, as backup voltage-stabiliser tube (20 in Fig. 2), forms three protections of overvoltage.Its reason is; when rectifier terminal thunderbolt is shoved when too high; accurate adjustment resistance voltage in base stage connected pressure-adjustable branch road increases, and by causing, backup voltage-stabiliser tube in parallel is open-minded, and voltage is adjusted to transistor base pressure limiting; in the time of overvoltage not; backup voltage-stabiliser tube is by pressure-adjustable branch road clamper, and no current passes through, and does not produce electrical wear; can not damage reliable when guaranteeing to protect.
Two, the reason that anti-lightning is effective and anti-overvoltage capabilities is strong:
In thunderbolt, when overvoltage, first the pressure of gushing of generation is to appear at rectification output, so have and gush protection while pressing and start immediately at the output of rectification, starts fast.And the means of dissolving are the modes that rear class adopted to open circuit, can not be delivered to rear class so pressure is gushed in the thunderbolt of stopping, the 3rd, active in circuit has adopted high countervoltage triode, has promoted overvoltage protection index.Relevant principle analysis is as follows:
1, the voltage stabilizing value of overvoltage door voltage-stabiliser tube (7) is adjusted the voltage stabilizing value of voltage-stabiliser tube far away higher than voltage; but well below voltage adjust triode and pressure value; in the time there is no overvoltage; rectifier output voltage can not puncture overvoltage door voltage-stabiliser tube; therefore can not make overvoltage protection triode (9) conducting, so overvoltage protection triode should be in cut-off state yet.
2, there being thunderbolt to cause rectification output end voltage serious when too high; exceed the voltage stabilizing value of overvoltage door voltage-stabiliser tube; now overvoltage protection triode conducting; immediately voltage is adjusted the base bleeder current of triode; the emitter voltage that makes voltage adjust triode reduces; and the rule forming is; overvoltage is higher; the shunting that overvoltage protection triode is adjusted transistor base to voltage is larger; the emitter voltage that voltage is adjusted triode is lower; make joined electronic equipment become open-circuit condition, thereby become open type overvoltage protection.
3 and when thunderbolt disappear; rectifier output voltage can not puncture door again and trigger voltage-stabiliser tube; overvoltage protection triode immediate recovery is cut-off state; the fallback circuit that becomes protection, whole system reverts to normal operating conditions, thereby the open type overvoltage crowbar moment is all standby; can not damage; and in the time having thunderbolt or overvoltage, start immediately again, protection reliability is high.
4, to adjust triode and overvoltage protection triode be all the high-power NPN triode of high back-pressure to voltage, and its reverse breakdown value is up to several hectovolts, only has 30V left and right and three end integrated voltage-stabilizeds of 78 series are withstand voltage, height 10 times of left and right, greatly promoted lightning protection capability.
Three, direct current charge/discharge unit has important effect in this power supply, by floating charge protective resistance (12), storage battery (14), discharge diode (13), rectification control diode (15), the base stage controlled resistor (16) of discharge diode forms jointly, form such principle: 1, can realize standard floating charge: the base voltage that voltage is adjusted triode is formed by voltage adjustment voltage-stabiliser tube and the voltage stabilizing of voltage accurate adjustment resistance, it is a definite value that voltage is adjusted voltage-stabiliser tube, accurate adjustment resistance can be adjusted by the voltage within 0.7V, so can adjust easily the required magnitude of voltage of ground floating charge, if with voltage being adjusted to two diodes of the many series connection of voltage-stabiliser tube described in measure 2, the upper accurate adjustment resistance of series connection can adjust required magnitude of voltage more easily again, and once the base voltage of voltage adjustment triode is fixing, its emitter voltage is only than the few 0.7V of base voltage, so base voltage is increased to 0.7V on the basis of 13.8V in the time of pressure regulation, just the magnitude of voltage of floating charge can be reached.The effect one of floating charge protective resistance in this circuit is that large electric current has been carried out to current limliting, and effect two is to realize the isolation of voltage between floating charge point and storage battery, thereby in the time having interchange, both can floating charge, can become again operating voltage.
2, can not produce voltage drop when battery discharging: the first, in the time of rectification output no-voltage, discharge diode conducting, be that storage battery starts electric discharge, because the discharge diode high-power PNP triode that is high back-pressure, when its conducting, pressure drop is very little, negligible, so can not produce pressure drop in without alternating current, the collector voltage of discharge diode is equal to battery tension.
The second, when rectification output cathode has voltage, just show now to have alternating current to exist, storage battery should be floating charge phenomenon, and discharge diode is because be PNP pipe, and its base stage has voltage to exist, can conducting, collector electrode does not have Voltage-output.When rectification output cathode no-voltage, discharge diode base stage no-voltage, it has just formed the form of an electronic switch, forms conducting state, and storage battery starts electric discharge, and collector electrode output voltage is distinguished two stages of floating charge and battery discharging reliably.
Four, balance diode (17) Main Function is step-down, the voltage of floating charge point is down to 12V, consistent with battery tension, like this good outer is that equipment can normally be worked in the time having alternating current, when without alternating current, voltage when equipment can not have alternating current because of storage battery pressure ratio is low and cisco unity malfunction allows equipment ensure at any time good service behaviour.
Five, the function initiatively showing when this power supply also has overcurrent; when output current excessive; the pressure drop that causes voltage to adjust transistor emitter overcurrent protection resistance (10) two ends of connecting increases suddenly; base current shows luminous tube (11) by overcurrent; overcurrent shows that luminotron lamp is bright, forms the base bleeder current of voltage being adjusted to triode, and the overcurrent here shows that luminous tube has played double action; the one, overcurrent protection kit, the 2nd, luminous instruction.Answer the such situation of furnishing with entering it should be noted that in when debugging, when normal, lamp does not work, and in the time having fault, output overcurrent is more, shunt greatlyr, and overcurrent luminous tube is brighter, automatically forms the protection to voltage adjustment triode.Its benefit is to conclude whether there is fault by whether overcurrent luminous tube is shinny, is a kind of source of stable pressure thereby the present invention is become, and is also a kind of monitor.
Six, can not damage the reason of circuit in the higher place of civil power and period: adjusting triode (4 in Fig. 1) because of voltage is high back-pressure large power triode, although the voltage of now bridge-type output is high, also far below its withstand voltage.
Seven, can be in the main cause of the lower place of civil power and period work: the one, the voltage in circuit is adjusted triode (4 in Fig. 1), can not produce additional electrical pressure drop, directly bridge rectifier output voltage is adjusted into output voltage, be to need only bridge-type voltage higher than output voltage, just can make voltage adjust triode work, just can voltage stabilizing.(illustrate: if the input voltage expansion scheme that adopts traditional triode to connect with three end integrated circuits, the required voltage of must three end integrated circuits normally working, also needs triode operating voltage simultaneously, and main product has been given birth to triode supplementary loss voltage like this.Be in the time that civil power is low, bridge-type output must deduct after this supplementary loss voltage, is only the input effective voltage of three end integrated circuits.And in the time that civil power is low, this is valuable voltage.) it two is that so time can bridge-type output voltage can be designed higherly in design, in the time that civil power is low, at this moment bridge-type voltage can not be very low, just can do certain compensation because it is high back-pressure large power triode that voltage is adjusted triode.
After the invention process, there is following significant advantage:
1, anti-thunder and overvoltage protection are effective.Had and gushed while pressing at the output of rectification, protection starts immediately, starts fast.And the means of dissolving are the modes that rear class adopted to open circuit; gush to press so stop to be struck by lightning and be delivered to rear class; show following some: the one, have source protection highly sensitive; the collector load of overvoltage protection triode is the upper inclined to one side resistance that voltage is adjusted triode; this numerical value is thousands of Europe; if overpressure value exceedes triggering door, slightly electric current of overvoltage protection transistor base, overvoltage protection triode becomes operating state immediately.The 2nd, protection is large, significantly shunts, until close output end voltage completely because will exchange homogeneous tube base current after the conducting of protection triode.The 3rd, when overvoltage, automatically form protection, and after transient state peak, automatically recover.So needn't ensure the safety of equipment with the traditional form of power-off at thundery sky, this has very important significance to a lot of special installation tools again, be that traditional three-terminal voltage-stabilizing cannot be accomplished.
2, stable voltage can be provided, again to the standby monitoring effect of having played of arrange, if institute arranges standby breaking down, source current is increased, overcurrent protection monitoring indicator light sends light warning immediately, and in the time being fault-free at ordinary times, can not produce warning, this is very beneficial to the maintenance of product, because ordinary electrical home appliance can just can be observed out easily in use, and to a lot of application products, as alarm, in the time having emergency call, just know that whether this equipment is normal, and had after clearly instruction, just can know easily that whether this equipment working state is correct.
3, can expand civil power excursion, can not damage circuit in the higher place of civil power and period, normally work in the lower place of civil power and period, have wider adaptive capacity than traditional stabilized voltage power supply.
4, not only met the floating voltage 13.8V of standard of storage battery, solve especially the high and contradiction that discharge voltage is low of storage battery float charge voltage, in the time having alternating current, storage battery is floating charge state, during without alternating current, storage battery starts electric discharge, and battery tension enters into electronic equipment and can not produce voltage drop, makes equipment whenever all keep good service behaviour.
Brief description of the drawings
Fig. 1 implements the most basic circuit diagram of measure of the present invention.
In figure: 1, rectification output; 3, voltage is adjusted triode; 4, voltage is adjusted the upper inclined to one side resistance of triode; 5, voltage is adjusted voltage-stabiliser tube; 6, accurate adjustment resistance; 7, overvoltage door voltage-stabiliser tube; 8, overvoltage protection resistance; 9, overvoltage protection triode; 10, overcurrent protection resistance; 11, overcurrent shows luminous tube; 12, floating charge protective resistance; 13, discharge diode; 14, storage battery; 15, rectification control diode; 16, base stage controlled resistor; 17, balance diode; 18, voltage output end.
Fig. 2 is the circuit diagram that the voltage in measure 2 is adjusted the pressure-adjustable branch circuit parallel connection backup voltage-stabiliser tube in two coarse adjustment diodes of voltage-stabiliser tube series connection, measure 3.
In figure: 1, rectification output; 3, voltage is adjusted triode; 4, voltage is adjusted the upper inclined to one side resistance of triode; 5, voltage is adjusted voltage-stabiliser tube; 6, accurate adjustment resistance; 7, overvoltage door voltage-stabiliser tube; 8, overvoltage protection resistance; 9, overvoltage protection triode; 10, overcurrent protection resistance; 11, overcurrent shows luminous tube; 12, floating charge protective resistance; 13, discharge diode; 14, storage battery; 15, rectification control diode; 16, base stage controlled resistor; 17, balance diode; 18, voltage output end; 19, in measure 2, voltage is adjusted two coarse adjustment diodes that voltage-stabiliser tube is connected; 20, the backup voltage-stabiliser tube of pressure-adjustable branch circuit parallel connection in measure 3.
Embodiment
1, selectors: voltage is adjusted triode and overvoltage protection triode all selects the high-power NPN triode of high back-pressure; overcurrent shows that luminous tube selects high brightness type; if press Fig. 2 welding, backup voltage-stabiliser tube should select voltage stabilizing value should adjust higher than voltage the voltage-stabiliser tube of the magnitude of voltage after two coarse adjustment diodes of voltage-stabiliser tube series connection and accurate adjustment resistance.
2, press the line map welding of Fig. 1 or Fig. 2.
3, adjust power supply output valve.Voltage is adjusted voltage-stabiliser tube is the coarse adjustment of output voltage, uses gone here and there resistance as accurate adjustment, and its rule is that more high output voltage is higher for voltage-stabiliser tube value, resistance is larger, and output voltage is higher, otherwise lower, if press Fig. 2 welding, be that voltage-stabiliser tube value is higher, output voltage is higher, and resistance is larger, output voltage is higher, the coarse adjustment diode of connecting is more, and voltage is higher, otherwise lower.
4, adjust overvoltage protection parameter.The transformer primary side that breaks, is connected on source of stable pressure output with oscillographic, clicks rectifier terminal with the direct voltages of 100 volts, and oscilloscope display output reduces to zero substantially by normal voltage, and after the high pressure of 100 volts removes, output voltage recovers normally.Otherwise should adjust the voltage stabilizing parameter value of the overvoltage door voltage-stabiliser tube in overvoltage protection transistor base loop.
5, adjust protection parameters.Connect the dummy load of " adjustable " at output, with ammeter string in dummy load loop, adjust load, ammeter numerical value is looked in sight, in the time that shown in ammeter, numerical value reaches design value, continue load resistance to reduce (being that power strengthens), now current value no longer increases, and overcurrent shows that luminous tube is bright.
6, adjust the performance of discharge diode, the first is in the time that rectification has output, and measuring electricity transistor emitter and collector voltage should be opened a way.It two is in the time of rectification no-output, and measuring electricity transistor emitter should be less than 0.1 with collector voltage, otherwise the resistance of the base stage controlled resistor of change discharge diode.

Claims (4)

1. a rectifier terminal protection type display power supply, is characterized in that: be jointly made up of rectification output end protected location, voltage stabilizing adjustment unit, overcurrent display unit, direct current charge/discharge unit, balance diode;
Wherein: rectification input protected location is: the positive pole of overvoltage door voltage-stabiliser tube connects rectification output, the negative pole of overvoltage door diode connects the termination, one side of overvoltage protection resistance, the another side termination of overvoltage protection resistance connects the base stage of overvoltage protection triode, the grounded emitter line of overvoltage protection triode, the collector electrode of overvoltage protection triode connects the base stage of voltage adjustment triode;
Upper inclined to one side resistance and pressure-adjustable branch road that voltage stabilizing adjustment unit is adjusted triode, voltage adjustment triode by voltage form; Voltage is adjusted the collector electrode connection rectification output of triode, and one of the upper inclined to one side resistance that voltage is adjusted triode connects rectification output, and other end connection voltage is adjusted the base stage of triode, and the base stage that voltage is adjusted triode has connected pressure-adjustable branch road to ground wire; Pressure-adjustable branch road is the base stage that the positive pole of voltage adjustment voltage-stabiliser tube is connected to voltage adjustment triode, after an accurate adjustment resistance of negative pole series connection, arrives ground wire;
Overcurrent display unit is: after an overcurrent protection resistance of emitter series connection of voltage adjustment triode, to floating charge point, overcurrent shows that the positive pole of luminous tube connects the base stage of voltage adjustment triode, and overcurrent protection shows that the negative pole of luminous tube connects floating charge point;
Direct current charge/discharge unit: the upper one end that connects a floating charge protective resistance of floating charge point, the other end of floating charge protective resistance connects two-way, one tunnel is to have connected storage battery, another road connects the emitter of discharge diode, the base stage of discharge diode has connected two-way, and a road connects base stage controlled resistor to ground wire, and another road connects the negative pole of a rectification control diode, the positive pole of rectification control diode connects rectification output, and the collector electrode of discharge diode becomes voltage output end as output;
Balance diode is to be in series by three diodes, and the positive pole of balance diode connects floating charge point, and negative pole becomes voltage output end.
2. a kind of rectifier terminal protection type display power supply according to claim 1; it is characterized in that: voltage is adjusted voltage-stabiliser tube series connection accurate adjustment resistance can also increase the coarse adjustment of two diodes as voltage, its form is that voltage is adjusted two coarse adjustment diodes of voltage-stabiliser tube series connection and gone here and there after accurate adjustment resistance to ground wire again.
3. a kind of rectifier terminal protection type display power supply according to claim 1; it is characterized in that: the base stage connected pressure-adjustable branch circuit parallel connection that voltage is adjusted triode has a backup voltage-stabiliser tube; the positive pole of voltage-stabiliser tube connects the base stage of voltage adjustment triode, the minus earth of voltage-stabiliser tube.
4. a kind of rectifier terminal protection type display power supply according to claim 1, is characterized in that: discharge diode is selected the withstand voltage PNP triode for 100V.
CN201420270286.0U 2014-05-26 2014-05-26 Protective display power source used for rectification terminal Expired - Fee Related CN203911752U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420270286.0U CN203911752U (en) 2014-05-26 2014-05-26 Protective display power source used for rectification terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420270286.0U CN203911752U (en) 2014-05-26 2014-05-26 Protective display power source used for rectification terminal

Publications (1)

Publication Number Publication Date
CN203911752U true CN203911752U (en) 2014-10-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420270286.0U Expired - Fee Related CN203911752U (en) 2014-05-26 2014-05-26 Protective display power source used for rectification terminal

Country Status (1)

Country Link
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Granted publication date: 20141029

Termination date: 20150526

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