CN206523615U - The power down indicating circuit of three-phase alternating-current supply - Google Patents
The power down indicating circuit of three-phase alternating-current supply Download PDFInfo
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- CN206523615U CN206523615U CN201720256975.XU CN201720256975U CN206523615U CN 206523615 U CN206523615 U CN 206523615U CN 201720256975 U CN201720256975 U CN 201720256975U CN 206523615 U CN206523615 U CN 206523615U
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- power
- indicator lamp
- phase
- auxiliary reclay
- circuit
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- 230000005611 electricity Effects 0.000 claims description 7
- 238000005284 basis set Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
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Abstract
The power down indicating circuit of three-phase alternating-current supply, belongs to power supply monitoring technical field, the utility model be solution can not accurately judge AC power whether power down the problem of.The utility model includes rectified three-phase circuit, NE555 time-base integrated circuits, auxiliary reclay KA1, auxiliary reclay KA2, resistance R1~R4, electric capacity C1, electric capacity C2, optocoupler, NPN triode VT2, normal condition indicator lamp VL1 and power-down state indicator lamp VL2；When three-phase input voltage is all normal, VL1 is bright；When AC power power down, VL2 is bright；When AC power phase shortage, VL1 and VL2 alternatings are bright.
Description
Technical field
The utility model belongs to power supply monitoring technical field.
Background technology
At present, civil power power down is happened occasionally, when the unexpected power down of civil power, and very favourable opposition is produced to the equipment being much currently running
Hit, and data during power down can not be preserved in time；If civil power power down can not find and handle in time, it may trigger more tight
The security incident of weight.
In most of electronic equipments powered using AC power, in input ac power power down, it is necessary to quickly
The signal of exchange input power down is detected, and necessary protection is carried out to equipment, to ensure the normal work of electronic equipment.Especially
Be to present increasing sophisticated electronics, with greater need for as early as possible detect the signal of AC dump, and avoid detection electricity
Road malfunction causes unit exception to operate.
But because alternating current input power supplying is the signal of a Symmetrical in itself, cause the voltage natural zero-crossing of AC signal
Voltage zero-cross when characteristic is with AC dump can not be distinguished effectively.Therefore, various detection circuits are mainly inputted by detecting now
AC signal average value, peak value equivalent drop to certain value and just alerted, but can not solve both to be quickly detected friendship substantially
Pour off electric signal, again will not when there is instantaneous interference fall in AC signal misoperation contradiction.Due to can not be quick
And AC dump signal is accurately recognized, it largely have impact on the Performance And Reliability of electronic equipment.
The content of the invention
The utility model purpose be in order to solve accurately to judge AC power whether power down the problem of there is provided one kind
The power down indicating circuit of three-phase alternating-current supply.
The power down indicating circuit of three-phase alternating-current supply described in the utility model includes basis set when rectified three-phase circuit, NE555
Into circuit, auxiliary reclay KA1, auxiliary reclay KA2, resistance R1~R4, electric capacity C1, electric capacity C2, optocoupler, NPN triode
VT2, normal condition indicator lamp VL1 and power-down state indicator lamp VL2；Optocoupler is by light emitting diode D7 and phototriode VT1 structures
Into；
The three-phase firewire of AC power connects the ac input end of rectified three-phase circuit, the positive pole electricity of rectified three-phase circuit respectively
Source output terminal connects one end of resistance R1 one end, resistance R2 one end and electric capacity C1 simultaneously；The resistance R2 other end connects simultaneously
Connecting resistance R3 one end and light emitting diode D7 anode；The negative power supply output end of rectified three-phase circuit connects resistance R1 simultaneously
The other end, the electric capacity C1 other end, the resistance R3 other end and light emitting diode D7 negative electrode；
Phototriode VT1 colelctor electrode connection NPN triode VT2 base stage, NPN triode VT2 colelctor electrode is simultaneously
Connect resistance R4 one end, 2 pin and 6 pin of NE555 time-base integrated circuits；The 5 pin connection electric capacity C2 of NE555 time-base integrated circuits
One end, 4 pin of NE555 time-base integrated circuits, 8 pin connect the resistance R4 other end, the one of auxiliary reclay KA2 coils simultaneously
End, one end of auxiliary reclay KA2 normally opened contacts, power-down state indicator lamp VL2 anode and+5V dc sources；Middle relay
The other end connection normal condition indicator lamp VL1 of device KA2 normally opened contacts anode；Power-down state indicator lamp VL2 negative electrode connection
One end of auxiliary reclay KA1 normally opened contacts；
3 pin of NE555 time-base integrated circuits connect the other end and auxiliary reclay of auxiliary reclay KA2 coils simultaneously
One end of KA1 coils；
Phototriode VT1 emitter stage connect simultaneously NPN triode VT2 emitter stage, the electric capacity C2 other end,
1 pin of NE555 time-base integrated circuits, the other end of auxiliary reclay KA1 coils, normal condition indicator lamp VL1 negative electrode and in
Between relay KA1 normally opened contacts the other end, and be grounded.
Preferably, rectified three-phase circuit constitutes three-phase bridge circuit by diode D1~D6.
Preferably, normal condition indicator lamp VL1 uses green LED, and power-down state indicator lamp VL2 is using red
Light emitting diode.
Preferably, individually bright sign AC power is normal by normal condition indicator lamp VL1；Power-down state indicator lamp VL2 is independent
Bright sign AC power power down；The bright sign AC power of normal condition indicator lamp VL1 and power-down state indicator lamp VL2 alternatings lacks
Phase.
Advantage of the present utility model：The utility model circuit structure is simple, is built using some analog elements, no program is embedding
Enter, using light-coupled isolation front stage circuit, subsequent conditioning circuit is effectively exported triggering command, can effectively detect AC power and fall
Electricity or default phase signal, and instruction result is provided rapidly.Those skilled in the art can further utilize two auxiliary reclays
Other contacts are gone to connect protection circuit, to realize power down or open-phase protection.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the power down indicating circuit of three-phase alternating-current supply described in the utility model.
Embodiment
Illustrate the power down indicating circuit of the three-phase alternating-current supply, three-phase alternating-current supply A, B, C three-phase separate with reference to Fig. 1
Three ac input ends of rectified three-phase circuit are not connected by current-limiting resistance R5, R6, R7, rectified three-phase circuit output ripple is straight
Power supply is flowed, when three-phase input voltage is all normal, the pulsating dc voltage of rectified three-phase circuit output can maintain optocoupler to turn on,
That is D7 is luminous to be impinged upon on VT1 photosurface, and VT1 conductings, the voltage of VT1 colelctor electrodes is pulled to low level, then VT2 base stage is not added with
Bias voltage is carried, VT2 ends, VT2 is equivalent to open circuit, and its resistance is infinitely great, then VT2 colelctor electrodes output high level, the voltage
Close to operating voltage+5V, therefore, the voltage of NE555 6 pin input exceedes the 2/3 of operating voltage, then NE555 3 pin output is low
Level, KA2 coils obtain electric, and KA2 normally opened contacts closure, VL1 is bright, characterizes working condition with this normal.
When AC power power down, optocoupler cut-off, VT1 cut-offs cause its collector voltage to be high level, equivalent in VT2
Base stage be loaded with bias voltage, turn on VT2, then VT2 collector voltage is pulled to low level, NE555 2 pin input electricity
3 pin forced down in 1/3, NE555 of operating voltage export high level, and KA2 coils two ends are high level, and no-voltage is poor, then KA2
Coil losing electricity, KA2 normally opened contact recovers to disconnect, and VL1 goes out；Meanwhile, KA1 coils obtain electric, KA1 normally opened contact closure, VL2
It is bright, power-down state is characterized with this.
When AC power phase shortage, the voltage of rectified three-phase circuit output makes optocoupler be in alternate conduction, off state, then
Make VT2 alternately cut-off, conducting, NE555 3 pin alternately export low level, high level, VL1 and VL2 alternating light on and off, the shape of flicker
State characterizes non-full-phase state.
The utility model circuit is used for the state for indicating AC power.Further, technical staff can utilize KA1, KA2
Other normally opened contacts or normally-closed contact control the on off state of auxiliary device, play the protection in abnormal condition and make
With.
Claims (4)
1. the power down indicating circuit of three-phase alternating-current supply, it is characterised in that basis set is into electricity during including rectified three-phase circuit, NE555
Road, auxiliary reclay KA1, auxiliary reclay KA2, resistance R1~R4, electric capacity C1, electric capacity C2, optocoupler, NPN triode VT2, just
Normal status indicator lamp VL1 and power-down state indicator lamp VL2；Optocoupler is made up of light emitting diode D7 and phototriode VT1；
The three-phase firewire of AC power connects the ac input end of rectified three-phase circuit respectively, and the cathode power supply of rectified three-phase circuit is defeated
Go out one end that end connects resistance R1 one end, resistance R2 one end and electric capacity C1 simultaneously；The resistance R2 other end connects electricity simultaneously
Hinder R3 one end and light emitting diode D7 anode；The negative power supply output end of rectified three-phase circuit connects the another of resistance R1 simultaneously
One end, the electric capacity C1 other end, the resistance R3 other end and light emitting diode D7 negative electrode；
Phototriode VT1 colelctor electrode connection NPN triode VT2 base stage, NPN triode VT2 colelctor electrode is connected simultaneously
Resistance R4 one end, 2 pin of NE555 time-base integrated circuits and 6 pin；The one of the 5 pin connection electric capacity C2 of NE555 time-base integrated circuits
End, 4 pin of NE555 time-base integrated circuits, 8 pin connect simultaneously the resistance R4 other end, one end of auxiliary reclay KA2 coils,
One end of auxiliary reclay KA2 normally opened contacts, power-down state indicator lamp VL2 anode and+5V dc sources；Auxiliary reclay
The other end connection normal condition indicator lamp VL1 of KA2 normally opened contacts anode；In power-down state indicator lamp VL2 negative electrode connection
Between relay KA1 normally opened contacts one end；
3 pin of NE555 time-base integrated circuits connect the other end and auxiliary reclay KA1 lines of auxiliary reclay KA2 coils simultaneously
One end of circle；
Phototriode VT1 emitter stage connects NPN triode VT2 emitter stage, the electric capacity C2 other end, NE555 simultaneously when
1 pin, the other end of auxiliary reclay KA1 coils, normal condition indicator lamp the VL1 negative electrode and auxiliary reclay of base integrated circuit
The other end of KA1 normally opened contacts, and be grounded.
2. the power down indicating circuit of three-phase alternating-current supply according to claim 1, it is characterised in that rectified three-phase circuit is by two
Pole pipe D1~D6 constitutes three-phase bridge circuit.
3. the power down indicating circuit of three-phase alternating-current supply according to claim 1, it is characterised in that normal condition indicator lamp
VL1 uses green LED, and power-down state indicator lamp VL2 uses red light emitting diodes.
4. the power down indicating circuit of three-phase alternating-current supply according to claim 3, it is characterised in that normal condition indicator lamp
Individually bright sign AC power is normal by VL1；Power-down state indicator lamp VL2 individually bright sign AC power power down；Normal condition refers to
Show the bright sign AC power phase shortage of lamp VL1 and power-down state indicator lamp VL2 alternatings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720256975.XU CN206523615U (en) | 2017-03-16 | 2017-03-16 | The power down indicating circuit of three-phase alternating-current supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720256975.XU CN206523615U (en) | 2017-03-16 | 2017-03-16 | The power down indicating circuit of three-phase alternating-current supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206523615U true CN206523615U (en) | 2017-09-26 |
Family
ID=59902796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720256975.XU Expired - Fee Related CN206523615U (en) | 2017-03-16 | 2017-03-16 | The power down indicating circuit of three-phase alternating-current supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206523615U (en) |
-
2017
- 2017-03-16 CN CN201720256975.XU patent/CN206523615U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170926 Termination date: 20200316 |