CN206742952U - LED emergency power supplies are met an urgent need switching circuit - Google Patents
LED emergency power supplies are met an urgent need switching circuit Download PDFInfo
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- CN206742952U CN206742952U CN201720409833.2U CN201720409833U CN206742952U CN 206742952 U CN206742952 U CN 206742952U CN 201720409833 U CN201720409833 U CN 201720409833U CN 206742952 U CN206742952 U CN 206742952U
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Abstract
The utility model discloses a kind of emergent switching circuit of LED emergency power supplies, including：Transformer, the first diode, the second diode, the first electric capacity, the second electric capacity, charging circuit, battery, on-off circuit, battery voltage detection circuit, power-fail detection circuit, emergency circuit；The power-fail detection circuit is used to detect power supply connection situation, and when power supply normal power supply, power-fail detection circuit conducting, emergency circuit disconnects；When power supply goes offline, power-fail detection circuit disconnects, emergency circuit conducting.The battery voltage detection circuit is used for the voltage for detecting battery both ends, when cell voltage, which discharges, causes shut-off threshold values, on-off circuit shut-off battery, avoids battery from crossing and puts.The utility model is also simple with circuit structure on the basis of it can realize normal emergency function, and cost is cheap, and reliability is high, the advantages that realizing after battery undervoltage shut-off without leakage current.
Description
Technical field
It the utility model is related to LED emergency drivings field, more particularly to a kind of emergent switching circuit of LED emergency power supplies.
Background technology
Emergency power supply switching circuit can guide trapped personnel evacuation or exhibition when fire occurs after normal illumination dump
Open fire fighting and rescue action.Shown in reference picture 1, traditional emergency power supply switching circuit is examined by AC power-fail detection circuits, cell voltage
Slowdown monitoring circuit, control circuit and emergency circuit etc. form, and are primarily present following shortcoming：1st, the electricity of traditional emergency power supply switching circuit
Line structure is more complicated, Circuit assembly trouble；2nd, the battery detection circuit in traditional emergency power supply switching circuit generally requires
Low-power chip is used, substantially increases circuit manufacturing cost；3rd, battery undervoltage is closed in traditional emergency power supply switching circuit
After emergency circuit, can also there is less operating current in battery voltage detection circuit, the electric current may result in battery appearance
Overdischarge, so that battery is damaged.Therefore, the prior art is defective, it is necessary to improve.
Utility model content
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of LED emergency power supplies are met an urgent need switching circuit.
The technical solution of the utility model is as follows：A kind of LED emergency power supplies are met an urgent need switching circuit, including：Transformer, first
Diode, the second diode, the first electric capacity, the second electric capacity, charging circuit, battery, on-off circuit, battery voltage detection circuit,
Power-fail detection circuit, emergency circuit；The transformer output end includes first level and second subprime；
One end ground connection of first level, the other end connect the positive pole of the first diode；
The negative pole of first diode connects the input of charging circuit；
Described first electric capacity one end is connected between the first diode and the input of charging circuit, other end ground connection；
It is grounded again after first output termination battery of the charging circuit, the second output termination on-off circuit of charging circuit
Input；
It is grounded again after first output termination battery voltage detection circuit of the on-off circuit, the second input of on-off circuit
It is grounded again after termination emergency circuit；
The positive pole of first diode also connects one end of second subprime, the diode of another termination second of second subprime
Positive pole；
The negative pole of second diode connects power-fail detection circuit, then is grounded；
Described second electric capacity one end is connected between the second diode and power-fail detection circuit, other end ground connection.
The on-off circuit includes the first triode, first resistor and second resistance；The first resistor is connected in parallel on first
Between the emitter stage and base stage of triode, one end of the second resistance connects the base stage of the first triode, the second resistance
The other end be used to connect battery voltage detection circuit, the colelctor electrode of first triode is used to connect emergency circuit.
Further, the battery voltage detection circuit includes controllable accurate source of stable pressure, 3rd resistor and the 4th resistance；Institute
State 3rd resistor and the 4th resistant series are followed by between the colelctor electrode and ground wire of first triode, the controllable accurate is steady
The plus earth of potential source, the reference pole of controllable accurate source of stable pressure are connected to 3rd resistor between the 4th resistance, the controllable essence
The negative electrode of close source of stable pressure is connected with the other end of the second resistance.
Further, the power-fail detection circuit include the 3rd electric capacity, the second triode, the 3rd diode, the 5th resistance,
6th resistance and the 7th resistance；6th resistance and the 7th resistant series are followed by the negative electrode and ground wire of second diode
Between, the 3rd diode anode is connected with the negative electrode of second diode, the negative electrode of the 3rd diode respectively with
One end of 5th resistance, one end connection of the 3rd electric capacity, the grounded emitter of second triode, the current collection of the second triode
The other end with the 5th resistance, the reference pole of controllable accurate source of stable pressure are connected respectively for pole, the base stage of second triode
It is connected between the 6th resistance and the 7th resistance, the 3rd electric capacity other end is connected to ground wire.
Further, first triode is PNP type triode, and second triode is NPN type triode.
Further, first electric capacity and the second electric capacity are polar capacitor, the anode and first of first electric capacity
The negative electrode connection of diode, negative electrode connection ground wire；The anode of second electric capacity is connected with the negative electrode of second diode, cloudy
Pole connects ground wire.
Using such scheme, the utility model provides a kind of LED emergency power supplies emergent switching circuit, works as power-fail detection circuit
Detect that power supply power supply is normal, export a low-voltage and answer urgent telegram to battery voltage detection circuit, battery voltage detection circuit control
Road disconnects；When power-fail detection circuit detects that power-down conditions occur for power supply, a high voltage is exported to battery voltage detection circuit,
Battery voltage detection circuit control emergency circuit conducting, reaching being capable of normal emergency function.In addition, circuit knot of the present utility model
The simple cost of structure is cheap, and reliability is high, can realize battery undervoltage after turning off without leakage current.
Brief description of the drawings
Fig. 1 is the structural representation of prior art；
Fig. 2 is structural representation of the present utility model；
Fig. 3 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Shown in reference picture 2 and Fig. 3, the utility model provides a kind of LED emergency power supplies and met an urgent need switching circuit, including：Transformation
Device, the first diode D1, the second diode D2, the first polar capacitor C1, the second polar capacitor C2, charging circuit 1, battery 3, open
Powered-down road 2, battery voltage detection circuit 4, power-fail detection circuit 5, emergency circuit 6.Wherein, the transformer output end includes
First level T1A and second subprime T1B, first level T1A one end are grounded, and the other end is connecting the first diode D1 just
Pole；The negative pole of the first diode D1 connects the input of charging circuit 1；First diode D1 negative poles are defeated with charging circuit 1
Enter between holding by the first polar capacitor C1 connection ground wires, utilize the first polar capacitor C1 to carry out voltage regulation filtering.The charging electricity
It is grounded again after the first output termination battery 3 on road 1, the input of the second output termination on-off circuit 2 of charging circuit 1.It is described
It is grounded again after first output termination battery voltage detection circuit 4 of on-off circuit 2, the second input of on-off circuit 2 scoops out urgency
It is grounded again after circuit 6.The positive pole of the first diode D1 also connects second subprime T1B one end, the second subprime T1B other end
Connect the second diode D2 positive pole；The negative pole of the second diode D2 is grounded again after connecing power-fail detection circuit 5.Second pole
Property electric capacity C2 one end be connected between the second diode D2 and power-fail detection circuit 5, the other end ground connection.
The power-fail detection circuit 5 is used to detect power supply connection situation, when power-fail detection circuit 5 detects that power supply falls
During electric situation, export a high voltage and turned on to battery voltage detection circuit 4, the controlling switch circuit 2 of battery voltage detection circuit 4,
So as to realize that emergency circuit 6 turns on, reaching being capable of normal emergency function.The battery voltage detection circuit 4 is additionally operable to detection electricity
The voltage at the both ends of pond 3, when the tension discharge of battery 3 causes shut-off threshold values, on-off circuit 2 turns off battery 3, avoids battery 3 from crossing and puts.
As a kind of embodiment, the on-off circuit 2 includes the first triode Q1, first resistor R1 and second resistance R2；
The first resistor R1 is connected in parallel between the first triode Q1 emitter stage and base stage, one end connection of the second resistance R2
First triode Q1 base stage, the other end of the second resistance are used to connect battery voltage detection circuit, the one or three pole
The colelctor electrode of pipe is used to connect emergency circuit.Wherein, the first triode Q1 switchs for emergent switching, using PNP type triode.
The battery voltage detection circuit 4 includes controllable accurate source of stable pressure U1,3rd resistor R3 and the 4th resistance R4；It is described
Battery voltage detection circuit includes controllable accurate source of stable pressure U1,3rd resistor R3 and the 4th resistance R4；The 3rd resistor R3 with
4th resistance R4 series connection is followed by between the colelctor electrode and ground wire of the first triode Q1, the controllable accurate source of stable pressure U1's
Plus earth, controllable accurate source of stable pressure U1 reference pole are connected to 3rd resistor R3 between the 4th resistance R4, the controllable essence
Close source of stable pressure U1 negative electrode is connected with the other end of the second resistance R2.
The power-fail detection circuit 5 include the 3rd electric capacity C3, the second triode Q2, the 3rd diode D3, the 5th resistance R5,
6th resistance R6 and the 7th resistance R7；The 6th resistance R6 connects with the 7th resistance R7 to be followed by the second diode D2's
Between negative electrode and ground wire, the three or the two pole Q2 pipe D3 anodes are connected with the negative electrode of the second diode D2, and the described 3rd 2
One end with the 5th resistance R5, the 3rd electric capacity C3 one end are connected pole pipe D3 negative electrode respectively, the hair of the second triode Q2
Emitter grounding, the ginseng of the second triode Q2 the colelctor electrode other end with the 5th resistance R5, controllable accurate source of stable pressure respectively
Pole connection is examined, the base stage of the second triode Q2 is connected between the 6th resistance R6 and the 7th resistance R7, the 3rd electric capacity
The C3 other ends are connected to ground wire.Wherein, the second triode Q2 is NPN type triode.
Utility model works principle：
When power input is normal, first level T1A of transformer electric current is flowed through by the first diode D1, the first polarity
Charged after electric capacity C1 rectifying and wave-filterings by charging circuit 1 to battery 3.The electric current for flowing through transformer second subprime T1B passes through second
After diode D2, the second polar capacitor C2 rectifying and wave-filterings, then after the 6th resistance R6, the 7th resistance R7 partial pressures, to the two or three
Pole pipe Q2 base stages provide base voltage, turn on the second triode Q2.
Controllable accurate source of stable pressure U1 reference pole, negative electrode and anode are respectively designated as the 1st pin, the 2nd pin and the 3rd pin.Its
In, the second triode Q2 conducting causes controllable accurate source of stable pressure U1 the 1st pin to be changed into low level (being less than 2.5V), meanwhile, can
The 2nd pin for controlling precision voltage regulator U1 is high level, and now, the first triode Q1 of emergent switching switch is not turned on.Do not fall in power supply
In the case of electricity, the utility model can be stablized is powered using power supply.
When power supply power-fail, transformer second subprime T1B Non voltage outputs, the second polar capacitor C2 both ends no-voltage, the
Two triode Q2 are not turned on.Controllable accurate source of stable pressure U1 the 1st pin is due to the storage voltage (being more than 2.5V) on the 3rd electric capacity C3
And it is changed into high level, controllable accurate source of stable pressure U1 the 2nd pin is changed into low level, and now, meet an urgent need the first triode Q1 of switching switch
Conducting, realizes that emergency circuit 6 is powered.
It is noted that after the first triode Q1 conductings, remain controllable by the 4th resistance R4,3rd resistor R3 partial pressures
Precision voltage regulator U1 the 1st pin high level.After battery 3, which discharges, closes, the voltage of battery 3 is by the 4th resistance R4 and 3rd resistor
The influence of R3 partial pressures, when the tension discharge of battery 3 causes shut-off threshold values, i.e. the partial pressure of the 4th resistance R4 and 3rd resistor R3 causes controllable
When the voltage of precision voltage regulator U1 the 1st pin is less than 2.5V, controllable accurate source of stable pressure U1 the 2nd pin is high level, now, is met an urgent need
The first triode Q1 of switching switch is closed, and is avoided battery 3 from crossing and is put.
In summary, the utility model provides a kind of LED emergency power supplies emergent switching circuit, when power-fail detection circuit detects
It is normal to power supply power supply, export a low-voltage and break to battery voltage detection circuit, battery voltage detection circuit control emergency circuit
Open；When power-fail detection circuit detects that power-down conditions occur for power supply, a high voltage is exported to battery voltage detection circuit, battery
Voltage detecting circuit control emergency circuit conducting, reaching being capable of normal emergency function.In addition, circuit structure letter of the present utility model
Single cost is cheap, and reliability is high, can realize battery undervoltage after turning off without leakage current.
Preferred embodiment of the present utility model is these are only, is not limited to the utility model, it is all in this practicality
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (6)
- The switching circuit 1. a kind of LED emergency power supplies are met an urgent need, it is characterised in that including：Transformer, the first diode, the two or two pole Pipe, the first electric capacity, the second electric capacity, charging circuit, battery, on-off circuit, battery voltage detection circuit, power-fail detection circuit, answer Urgent telegram road；The transformer output end includes first level and second subprime；One end ground connection of first level, the other end connect the positive pole of the first diode；The negative pole of first diode connects the input of charging circuit；Described first electric capacity one end is connected between the first diode and the input of charging circuit, other end ground connection；It is grounded again after first output termination battery of the charging circuit, the second output of charging circuit terminates the defeated of on-off circuit Enter end；It is grounded again after first output termination battery voltage detection circuit of the on-off circuit, the second input termination of on-off circuit It is grounded again after emergency circuit；The positive pole of first diode also connects one end of second subprime, and the diode of another termination second of second subprime is just Pole；The negative pole of second diode connects power-fail detection circuit, then is grounded；Described second electric capacity one end is connected between the second diode and power-fail detection circuit, other end ground connection.
- The switching circuit 2. LED emergency power supplies according to claim 1 are met an urgent need, it is characterised in that the on-off circuit includes First triode, first resistor and second resistance；The first resistor is connected in parallel between emitter stage and the base stage of the first triode, One end of the second resistance connects the base stage of the first triode, and the other end of the second resistance is used to connect cell voltage inspection Slowdown monitoring circuit, the colelctor electrode of first triode are used to connect emergency circuit.
- The switching circuit 3. LED emergency power supplies according to claim 2 are met an urgent need, it is characterised in that the battery voltage detection Circuit includes controllable accurate source of stable pressure, 3rd resistor and the 4th resistance；The 3rd resistor is followed by institute with the 4th resistant series Between the colelctor electrode and ground wire of stating the first triode, the plus earth of the controllable accurate source of stable pressure, controllable accurate source of stable pressure 3rd resistor is connected between the 4th resistance with reference to pole, negative electrode and the second resistance of the controllable accurate source of stable pressure The other end connects.
- The switching circuit 4. LED emergency power supplies according to claim 3 are met an urgent need, it is characterised in that the power-fail detection circuit Including the 3rd electric capacity, the second triode, the 3rd diode, the 5th resistance, the 6th resistance and the 7th resistance；6th resistance with 7th resistant series are followed by between the negative electrode and ground wire of second diode, the 3rd diode anode and described second The negative electrode connection of diode, one end with the 5th resistance, one end of the 3rd electric capacity are connected the negative electrode of the 3rd diode respectively, The grounded emitter of second triode, the colelctor electrode of the second triode other end with the 5th resistance, controllable respectively The reference pole connection of precision voltage regulator, the base stage of second triode is connected between the 6th resistance and the 7th resistance, described The 3rd electric capacity other end is connected to ground wire.
- The switching circuit 5. LED emergency power supplies according to claim 4 are met an urgent need, it is characterised in that first triode is PNP type triode, second triode are NPN type triode.
- The switching circuit 6. LED emergency power supplies according to claim 4 are met an urgent need, it is characterised in that first electric capacity and Two electric capacity are polar capacitor, and the anode of first electric capacity is connected with the negative electrode of the first diode, negative electrode connection ground wire；It is described The anode of second electric capacity is connected with the negative electrode of second diode, negative electrode connection ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720409833.2U CN206742952U (en) | 2017-04-18 | 2017-04-18 | LED emergency power supplies are met an urgent need switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720409833.2U CN206742952U (en) | 2017-04-18 | 2017-04-18 | LED emergency power supplies are met an urgent need switching circuit |
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| CN206742952U true CN206742952U (en) | 2017-12-12 |
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| CN201720409833.2U Active CN206742952U (en) | 2017-04-18 | 2017-04-18 | LED emergency power supplies are met an urgent need switching circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116160A (en) * | 2018-10-13 | 2019-01-01 | 深圳市比尔达科技有限公司 | Remote controlled emergency set detection device |
| CN109217455A (en) * | 2018-08-21 | 2019-01-15 | 厦门阳光恩耐照明有限公司 | A kind of emergency switching circuit of lighting circuit |
| CN109474061A (en) * | 2018-12-21 | 2019-03-15 | 中国航发控制系统研究所 | Low pressure drop power-supplying circuit |
| CN110071575A (en) * | 2019-06-04 | 2019-07-30 | 深圳莱福德科技股份有限公司 | Emergency power supply charge-discharge control circuit and emergency-lighting set |
| CN110568246A (en) * | 2019-05-17 | 2019-12-13 | 上海繁易信息科技股份有限公司 | Power failure alarm circuit and alarm method |
-
2017
- 2017-04-18 CN CN201720409833.2U patent/CN206742952U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217455A (en) * | 2018-08-21 | 2019-01-15 | 厦门阳光恩耐照明有限公司 | A kind of emergency switching circuit of lighting circuit |
| CN109116160A (en) * | 2018-10-13 | 2019-01-01 | 深圳市比尔达科技有限公司 | Remote controlled emergency set detection device |
| CN109474061A (en) * | 2018-12-21 | 2019-03-15 | 中国航发控制系统研究所 | Low pressure drop power-supplying circuit |
| CN109474061B (en) * | 2018-12-21 | 2021-09-03 | 中国航发控制系统研究所 | Low-voltage-drop power supply circuit |
| CN110568246A (en) * | 2019-05-17 | 2019-12-13 | 上海繁易信息科技股份有限公司 | Power failure alarm circuit and alarm method |
| CN110568246B (en) * | 2019-05-17 | 2021-09-14 | 上海繁易信息科技股份有限公司 | Power failure alarm circuit and alarm method |
| CN110071575A (en) * | 2019-06-04 | 2019-07-30 | 深圳莱福德科技股份有限公司 | Emergency power supply charge-discharge control circuit and emergency-lighting set |
| CN110071575B (en) * | 2019-06-04 | 2024-05-03 | 深圳莱福德科技股份有限公司 | Emergency power supply charge-discharge control circuit and emergency lighting equipment |
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