CN208820527U - The emergency switching circuit of lighting circuit - Google Patents

The emergency switching circuit of lighting circuit Download PDF

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Publication number
CN208820527U
CN208820527U CN201821351220.9U CN201821351220U CN208820527U CN 208820527 U CN208820527 U CN 208820527U CN 201821351220 U CN201821351220 U CN 201821351220U CN 208820527 U CN208820527 U CN 208820527U
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China
Prior art keywords
triode
circuit
emergency
base stage
alternating current
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CN201821351220.9U
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Chinese (zh)
Inventor
郑碧洪
吴群民
王炳生
许衍圭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Yankon Energetic Lighting Co Ltd
Zhejiang Yankon Group Co Ltd
Zhejiang Yangguang Meijia Lighting Co Ltd
Original Assignee
Xiamen Yankon Energetic Lighting Co Ltd
Zhejiang Yankon Group Co Ltd
Zhejiang Yangguang Meijia Lighting Co Ltd
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Application filed by Xiamen Yankon Energetic Lighting Co Ltd, Zhejiang Yankon Group Co Ltd, Zhejiang Yangguang Meijia Lighting Co Ltd filed Critical Xiamen Yankon Energetic Lighting Co Ltd
Priority to CN201821351220.9U priority Critical patent/CN208820527U/en
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Publication of CN208820527U publication Critical patent/CN208820527U/en
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Abstract

The utility model provides a kind of emergency switching circuit of lighting circuit, which has fast response time, and at low cost, battery is lossless when circuit does not work, the characteristics such as emergency switching when alternating current power down and not power down can be achieved at the same time.This circuit includes alternating current power down voltage detecting circuit, alternating current power-down control circuit, latching circuit, enabled control circuit and cell switch circuit.The emergency starting rapidly when alternating current powers off can be achieved by the combination of above several partial circuits, in the presence of alternating current can also start by set date and close emergency self-test, battery is lossless when alternating current is without input, battery is connect on product, can make battery will not over-discharge, battery can be reserved for longer time.

Description

The emergency switching circuit of lighting circuit
Technical field
The utility model relates to a kind of emergency switching circuits of lighting circuit.
Background technique
In LED emergence lighting lamp and other fire emergency fields, such as corridor stair emergency lighting, warehouse is answered Anxious illumination, switching emergency power supply carries out emergency lighting and generally uses chip microcontroller after alternating current power-off, and single-chip microcontroller passes through acquisition Signal does a series of controls, and uses single-chip microcontroller not only price is more expensive, and needs the specific software personnel to cooperate.And single-chip microcontroller is not Only the development cycle is long, and needs that the long period is spent to remove test bug, and more manpower and time is caused to waste for project.
Utility model content
Technical problem underlying to be solved in the utility model is to provide a kind of emergency switching circuit of lighting circuit, cost Low, when emergency circuit does not work, the power supply of emergency circuit is lossless.
In order to solve the above technical problems, the utility model provides a kind of emergency switching circuit of lighting circuit, packet It includes: triode Q3, triode Q4, triode Q6 and PMOS tube Q7;
The base stage of the triode Q3 is connected to isolating transformer by the cathode of resistance R28 and diode D8 and exports winding Same Name of Ends VX;The isolating transformer input winding is connected to alternating current;The collector of the triode Q3 is connected to described three The base stage of pole pipe Q4;The emitter of the triode Q4 is connected to the base stage of the triode Q6;The current collection of the triode Q6 Pole is connected to the grid of the PMOS tube Q7, and the source electrode of the PMOS tube Q7 is connected to the battery output of emergency circuit, described The drain electrode of PMOS tube Q7 is connected to the Input voltage terminal of emergency circuit;
When the alternating current normally powers on, the base stage of the triode Q3 is low level cut-off, the triode Q4, described Triode Q6 ends therewith, and the PMOS tube Q7 is also switched off, the battery output of the emergency circuit and the emergency circuit Input voltage terminal disconnects, and emergency circuit does not work;
When the alternating current power down, the base stage of the triode Q3 is high level conducting, the triode Q4, three pole Pipe Q6 is connected therewith, and the PMOS tube Q7 is also switched on, the input of the battery output of the emergency circuit and the emergency circuit Voltage end connection, emergency circuit work.
In a preferred embodiment: the Same Name of Ends VX of the isolating transformer output winding also passes through the sun of a diode D7 Pole is connected to the base stage of the triode Q2, and the collector of the triode Q2 is connected to the base stage of the triode Q3, described The emitter of triode Q2 is grounded;
The cathode of the diode D8 directly passes through electrolysis EC5 with the emitter of the triode Q2 and connect;
When the alternating current normally powers on, the base stage of the triode Q2 is high level conducting, and the electrolysis EC5 work is being filled Electricity condition;When the alternating current power down, the voltage of the Same Name of Ends VX input of the isolating transformer output winding is 0;Described three The base stage of pole pipe Q2 is low level cut-off, and the electrolysis EC5 work lifts the base voltage of the triode Q3 in discharge condition Up to high level.
In a preferred embodiment: the base stage of the triode Q3 is connected with emitter by resistance R31, the triode The base stage of Q4 is connected with collector by resistance R29;The resistance R31 and resistance R29 respectively constitute the triode Q3, The latching circuit of the triode Q4, when the electrolysis EC5 electric discharge after, the latching circuit make the triode Q3, The triode Q4 is kept on.
In a preferred embodiment:
It further include an emergency self-checking circuit comprising an extraneous trigger, input terminal are connected to the diode D7's Cathode;
It further include that the base stage of triode a Q5, the triode Q5 is connected to the output of extraneous trigger by resistance R33 End;The output voltage terminal VOUT of the current collection extremely emergency circuit of the triode Q5, the emitter of the triode Q5 pass through electricity Resistance R39 is connected to the base stage of the triode Q6;
Alternating current generates one high electricity after the Same Name of Ends VX and the diode D7 of isolating transformer output winding Ordinary mail number;When high level signal duration reaches preset time, the output end of external world's trigger issues high level Signal controls the triode Q5 conducting, and the base voltage of the triode Q6 is drawn high and is turned it on, so that described PMOS tube Q7 is also switched on, and the battery output of the emergency circuit is connected to the Input voltage terminal of the emergency circuit, answers urgent telegram Road work;After the emergency circuit working time reaching setting time, the output end of external world's trigger issues low level signal The triode Q5 cut-off is controlled, emergency circuit does not work.
Compared to the prior art, the technical solution of the utility model have it is following the utility model has the advantages that
Utility model provides a kind of emergency switching circuit of lighting circuit, applies in emergency lighting circuit, can be automatic Detection and switching emergency circuit save a large amount of manpowers and time resource for needing to spend with microcomputer development and test, and this electricity Cost is relatively low on road, therefore the standard emergency control circuit of can be used as is promoted.It is in particular in:
1. can be switched to emergency rating after alternating current power down rapidly, switching time actual measurement is less than 100mS;
2. alternating current power-on time detection can be carried out, thus also can start by set date and closing emergency self-test in the presence of alternating current;
3. battery is lossless when battery connects on product when alternating current is without input, battery can be made to protect in transport storing process The long period is deposited, battery over-discharge will not be made.
Detailed description of the invention
Fig. 1 is the circuit diagram of the preferred embodiment in the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and embodiments;
With reference to Fig. 1, a kind of emergency switching circuit of lighting circuit, comprising: triode Q3, triode Q4, triode Q6 and PMOS tube Q7;
The base stage of the triode Q3 is connected to isolating transformer by the cathode of resistance R28 and diode D8 and exports winding Same Name of Ends VX;The isolating transformer input winding is connected to alternating current;The collector of the triode Q3 is connected to described three The base stage of pole pipe Q4;The emitter of the triode Q4 is connected to the base stage of the triode Q6;The current collection of the triode Q6 Pole is connected to the grid of the PMOS tube Q7, and the source electrode of the PMOS tube Q7 is connected to the battery output of emergency circuit, described The drain electrode of PMOS tube is connected to the Input voltage terminal of emergency circuit;
When the alternating current normally powers on, the base stage of the triode Q3 is low level cut-off, the triode Q4, described Triode Q6 ends therewith, and the PMOS tube Q7 is also switched off, the battery output of the emergency circuit and the emergency circuit Input voltage terminal disconnects, and emergency circuit does not work;
When the alternating current power down, the base stage of the triode Q3 is high level conducting, the triode Q4, three pole Pipe Q6 is connected therewith, and the PMOS tube Q7 is also switched on, the input of the battery output of the emergency circuit and the emergency circuit Voltage end connection, emergency circuit work.
Therefore above-mentioned circuit can automatically switch to emergency circuit power supply in alternating current power down.And it is not necessarily in circuit Single-chip microcontroller is set, and switch speed is fast, and circuit cost is low.Without expending a large amount of human resources and time resource when designing circuit. Also, when alternating current is without input, the battery output of emergency circuit and the Input voltage terminal of emergency circuit are disconnected, and battery is lossless Consumption can make battery save the long period, will not make battery over-discharge in transport storing process.
Specifically, in order to realize automatic switchover when alternating current power down, the isolating transformer exports the Same Name of Ends of winding The anode that VX also passes through a diode D7 is connected to the base stage of the triode Q2, and the collector of the triode Q2 is connected to institute State the base stage of triode Q3, the emitter ground connection of the triode Q2;
The cathode of the diode D8 directly passes through electrolysis EC5 with the emitter of the triode Q2 and connect;
When the alternating current normally powers on, the base stage of the triode Q2 is high level conducting, and the electrolysis EC5 work is being filled Electricity condition;When the alternating current power down, the voltage of the Same Name of Ends VX input of the isolating transformer output winding is 0;Described three The base stage of pole pipe Q2 is low level cut-off, and the electrolysis EC5 work lifts the base voltage of the triode Q3 in discharge condition Up to high level.
In order to which after electrolysis EC5 electric discharge, emergency circuit is also held in use state, the triode Q3's Base stage is connected with emitter by resistance R31, and the base stage of triode Q4 is connected with collector by resistance R29;The resistance R31 The latching circuit that the triode Q3, the triode Q4 are respectively constituted with the R29, after electrolysis EC5 electric discharge, The latching circuit is kept on the triode Q3, the triode Q4.
In addition, usually need periodically to carry out test self-test to emergency circuit to guarantee that emergency circuit can work normally, It therefore, further include an emergency self-checking circuit in the present embodiment comprising an extraneous trigger, input terminal are connected to two pole The cathode of pipe D7;
It further include a triode Q5, base stage is connected to the output end of extraneous trigger by resistance R33;Its current collection is extremely The output voltage terminal VOUT of emergency circuit, emitter are connected to the base stage of triode Q6 by resistance R39;
Alternating current generates one high electricity after the Same Name of Ends VX and the diode D7 of isolating transformer output winding Ordinary mail number;When high level signal duration reaches preset time, the output end of external world's trigger issues high level Signal controls the triode Q5 conducting, and the base voltage of the triode Q6 is drawn high and is turned it on, so that described PMOS tube Q7 is also switched on, and the battery output of the emergency circuit is connected to the Input voltage terminal of the emergency circuit, answers urgent telegram Road work;After the emergency circuit working time reaching setting time, the output end of external world's trigger issues low level signal The triode Q5 cut-off is controlled, emergency circuit does not work.
The preferable specific embodiment of the above, only the utility model, but the design concept of the utility model is not It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, utilizes this design The change that unsubstantiality is carried out to the utility model belongs to the behavior for invading scope of protection of the utility model.

Claims (4)

1. a kind of emergency switching circuit of lighting circuit, characterized by comprising: triode Q3, triode Q4, triode Q6 and PMOS tube Q7;
The base stage of the triode Q3 is connected to isolating transformer by the cathode of resistance R28 and diode D8 and exports the same of winding Name end VX;The isolating transformer input winding is connected to alternating current;The collector of the triode Q3 is connected to the triode The base stage of Q4;The emitter of the triode Q4 is connected to the base stage of the triode Q6;The collector of the triode Q6 connects It is connected to the grid of the PMOS tube Q7, the source electrode of the PMOS tube Q7 is connected to the battery output of emergency circuit, the PMOS The drain electrode of pipe Q7 is connected to the Input voltage terminal of emergency circuit;
When the alternating current normally powers on, the base stage of the triode Q3 is low level cut-off, the triode Q4, three pole Pipe Q6 ends therewith, and the PMOS tube Q7 is also switched off, the input of the battery output of the emergency circuit and the emergency circuit Voltage end disconnects, and emergency circuit does not work;
When the alternating current power down, the base stage of the triode Q3 is high level conducting, the triode Q4, the triode Q6 It is connected therewith, the PMOS tube Q7 is also switched on, the input voltage of the battery output of the emergency circuit and the emergency circuit End connection, emergency circuit work.
2. a kind of emergency switching circuit of lighting circuit according to claim 1, it is characterised in that: the isolating transformer The anode that the Same Name of Ends VX of output winding also passes through a diode D7 is connected to the base stage of the triode Q2, the triode Q2 Collector be connected to the base stage of the triode Q3, the emitter ground connection of the triode Q2;
The cathode of the diode D8 directly passes through electrolysis EC5 with the emitter of the triode Q2 and connect;
When the alternating current normally powers on, the base stage of the triode Q2 is high level conducting, and the electrolysis EC5 work is in charging shape State;When the alternating current power down, the voltage of the Same Name of Ends VX input of the isolating transformer output winding is 0;The triode The base stage of Q2 is low level cut-off, and the base voltage of the triode Q3 is raised to by the electrolysis EC5 work in discharge condition High level.
3. a kind of emergency switching circuit of lighting circuit according to claim 2, it is characterised in that: the triode Q3's Base stage is connected with emitter by resistance R31, and the base stage of the triode Q4 is connected with collector by resistance R29;The electricity The resistance R31 and resistance R29 respectively constitutes the latching circuit of the triode Q3, the triode Q4, when the electrolysis EC5 is put After electricity, the latching circuit is kept on the triode Q3, the triode Q4.
4. a kind of emergency switching circuit of lighting circuit according to claim 3, it is characterised in that: further include an emergency from Examine circuit comprising an extraneous trigger, input terminal are connected to the cathode of the diode D7;
It further include that the base stage of triode a Q5, the triode Q5 is connected to the output end of extraneous trigger by resistance R33;Institute The emitter for stating the output voltage terminal VOUT, the triode Q5 of the current collection extremely emergency circuit of triode Q5 passes through resistance R39 It is connected to the base stage of the triode Q6;
Alternating current generates a high level letter after the Same Name of Ends VX and the diode D7 of isolating transformer output winding Number;When high level signal duration reaches preset time, the output end of external world's trigger issues high level signal The triode Q5 conducting is controlled, the base voltage of the triode Q6 is drawn high and is turned it on, so that the PMOS tube Q7 is also switched on, and the battery output of the emergency circuit is connected to the Input voltage terminal of the emergency circuit, emergency circuit work; After the emergency circuit working time reaching setting time, the output end of external world's trigger is issued described in low level signal control Triode Q5 cut-off, emergency circuit do not work.
CN201821351220.9U 2018-08-21 2018-08-21 The emergency switching circuit of lighting circuit Active CN208820527U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821351220.9U CN208820527U (en) 2018-08-21 2018-08-21 The emergency switching circuit of lighting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821351220.9U CN208820527U (en) 2018-08-21 2018-08-21 The emergency switching circuit of lighting circuit

Publications (1)

Publication Number Publication Date
CN208820527U true CN208820527U (en) 2019-05-03

Family

ID=66274129

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821351220.9U Active CN208820527U (en) 2018-08-21 2018-08-21 The emergency switching circuit of lighting circuit

Country Status (1)

Country Link
CN (1) CN208820527U (en)

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