CN208971117U - A kind of AC control circuit for Microcomputer Protection - Google Patents
A kind of AC control circuit for Microcomputer Protection Download PDFInfo
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- CN208971117U CN208971117U CN201821896842.XU CN201821896842U CN208971117U CN 208971117 U CN208971117 U CN 208971117U CN 201821896842 U CN201821896842 U CN 201821896842U CN 208971117 U CN208971117 U CN 208971117U
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- alternating current
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Abstract
The utility model discloses a kind of AC control circuits for Microcomputer Protection, including opto-coupler chip U1, zero-pressure integration trigger chip U2 and thyristor SCR1, the positive input terminal of opto-coupler chip U1 to be connected by input resistance R1 with the control output end of Microcomputer Protection；The positive output end of opto-coupler chip U1 is connected by resistance R2 with the first pin of zero-pressure integration trigger chip U2, second pin jointly, the first pin of zero-pressure integration trigger chip U2 also passes through resistance R3 and is connected with the firewire of alternating current, third pin, the 7th pin of zero-pressure integration trigger chip U2 pass through resistance R4 respectively, resistance R5 is connected with the firewire of alternating current, and the firewire of alternating current is also connected with the 4th pin, the 5th pin of zero-pressure integration trigger chip U2.The utility model can control alternating current to load for power-off, and easy to control, circuit is simple, and low in energy consumption, secure safety is high, have a good application prospect.
Description
Technical field
The utility model relates to Microcomputer Protection control technology fields, and in particular to a kind of exchange control for Microcomputer Protection
Circuit.
Background technique
Microcomputer Protection is the relay protection constituted with microcomputer, is the developing direction of relay protection of power system, it
It is highly selective with high reliability, it is highly sensitive, therefore, it is widely used.In Microcomputer-based Protection Hardware circuit design mistake
Cheng Zhong, electronic element is numerous, and cost of manufacture is high, and late detection and maintenance are all more inconvenient, especially controls in Alternating Current Power Supply
It in terms of function, is controlled using relay, electronic element quantity is more, and assembly welding is inconvenient, and controls reliability and safety all
It is bad.
Utility model content
The purpose of the utility model is to overcome in existing Microcomputer Protection in terms of Alternating Current Power Supply control function, electronics vigour
Number of packages amount is more, and assembly welding is inconvenient, and controls reliability and the bad problem of safety.The utility model is used for Microcomputer Protection
AC control circuit, by opto-coupler chip U1 isolation control signal and trigger signal, security reliability increases, and increases zero
Integration trigger chip U2 is pressed, realizes triggering thyristor, to control alternating current to load for power-off, easy to control, circuit letter
Single, low in energy consumption, secure safety is high, has a good application prospect.
In order to achieve the above object, the technical scheme adopted by the utility model is
A kind of AC control circuit for Microcomputer Protection, including opto-coupler chip U1, zero-pressure integration trigger chip U2 and crystalline substance
Brake tube SCR1,
The positive input terminal of the opto-coupler chip U1 is connected by input resistance R1 with the control output end of Microcomputer Protection, institute
The negative input end for stating opto-coupler chip U1 is connected to the ground；
The positive output end of the opto-coupler chip U1 passes through the first pin of resistance R2 and zero-pressure integration trigger chip U2, second
Pin is connected jointly, and the first pin of the zero-pressure integration trigger chip U2 also passes through resistance R3 and is connected with the firewire of alternating current
It connects, third pin, the 7th pin of the zero-pressure integration trigger chip U2 passes through the fire of resistance R4, resistance R5 and alternating current respectively
Line is connected, and the firewire of the alternating current is also connected with the 4th pin, the 5th pin of zero-pressure integration trigger chip U2, described
The negative output terminal of opto-coupler chip U1 is connected to the ground,
The firewire of the alternating current is connected to the ground by capacitor C1, the third pin of the zero-pressure integration trigger chip U2
It is also connected to the ground by resistance R6, the 8th pin of the zero-pressure integration trigger chip U2 is connected to the ground, the zero-pressure collection
It is connected by resistance R7 with the zero curve of alternating current at the 6th pin of flip chip U2, the zero-pressure integration trigger chip U2's
6th pin also passes through capacitor C2 and is connected with the firewire of alternating current, the 7th pin of the zero-pressure integration trigger chip U2 also with
The base stage of triode T1 is connected, and the emitter of the triode T1 is connected with the gate pole of thyristor SCR1, the thyristor
One end of SCR1 is connected with the firewire of alternating current, the firewire that the other end of the thyristor SCR1 passes through load Rs and alternating current
Zero curve be connected, the collector of the triode T1 is connected to the ground by resistance R8；
The other end of the thyristor SCR1 is also in series with lighting pilot lamp L1, is in series with out on the firewire of the alternating current
Close S1, fuse F1.
A kind of AC control circuit for Microcomputer Protection above-mentioned, the model of the zero-pressure integration trigger chip U2
MFC8070。
A kind of AC control circuit for Microcomputer Protection above-mentioned, the model TLP185 of the opto-coupler chip U1.
A kind of AC control circuit for Microcomputer Protection above-mentioned, the triode T1 are PNP type triode.
A kind of AC control circuit for Microcomputer Protection above-mentioned, the resistance value of the input resistance are 50 Ω.
Two ends of a kind of AC control circuit for Microcomputer Protection above-mentioned, the thyristor SCR1 are also parallel with
Resistance R9, capacitor C3, the resistance R9, capacitor C3 are connected in series.
A kind of AC control circuit for Microcomputer Protection above-mentioned, the resistance R6 are slide rheostat.
The beneficial effects of the utility model are: the AC control circuit for Microcomputer Protection of the utility model, passes through light
Coupling chip U1 isolation control signal and trigger signal, security reliability increases, and increases zero-pressure integration trigger chip U2, realizes
Thyristor is triggered, to control alternating current to load for power-off, easy to control, circuit is simple, low in energy consumption, secure safety
Height has a good application prospect.
Detailed description of the invention
Fig. 1 is the circuit diagram of the AC control circuit for Microcomputer Protection of the utility model.
Specific embodiment
Below in conjunction with Figure of description, the utility model is further described.
As shown in Figure 1, the AC control circuit for Microcomputer Protection of the utility model, including opto-coupler chip U1, zero-pressure
Integration trigger chip U2 and thyristor SCR1,
The positive input terminal of the opto-coupler chip U1 is connected by input resistance R1 with the control output end of Microcomputer Protection, institute
The negative input end for stating opto-coupler chip U1 is connected to the ground；
The positive output end of the opto-coupler chip U1 passes through the first pin of resistance R2 and zero-pressure integration trigger chip U2, second
Pin is connected jointly, and the first pin of the zero-pressure integration trigger chip U2 also passes through resistance R3 and is connected with the firewire of alternating current
It connects, third pin, the 7th pin of the zero-pressure integration trigger chip U2 passes through the fire of resistance R4, resistance R5 and alternating current respectively
Line is connected, and the firewire of the alternating current is also connected with the 4th pin, the 5th pin of zero-pressure integration trigger chip U2, described
The negative output terminal of opto-coupler chip U1 is connected to the ground,
The firewire of the alternating current is connected to the ground by capacitor C1, the third pin of the zero-pressure integration trigger chip U2
It is also connected to the ground by resistance R6, the 8th pin of the zero-pressure integration trigger chip U2 is connected to the ground, the zero-pressure collection
It is connected by resistance R7 with the zero curve of alternating current at the 6th pin of flip chip U2, the zero-pressure integration trigger chip U2's
6th pin also passes through capacitor C2 and is connected with the firewire of alternating current, the 7th pin of the zero-pressure integration trigger chip U2 also with
The base stage of triode T1 is connected, and the emitter of the triode T1 is connected with the gate pole of thyristor SCR1, the thyristor
One end of SCR1 is connected with the firewire of alternating current, the firewire that the other end of the thyristor SCR1 passes through load Rs and alternating current
Zero curve be connected, the collector of the triode T1 is connected to the ground by resistance R8；
The other end of the thyristor SCR1 is also in series with lighting pilot lamp L1, can be when triggering starting load Rs work
It waits, is used to the function of prompting and illuminate by lighting pilot lamp L1, is in series with switch S1, fuse F1 on the firewire of alternating current,
Switch S1, which can be realized, to be manually controlled, and fuse F1 can be blown when electric current is excessive, protects entire circuit.
Preferably, the model MFC8070 of the zero-pressure integration trigger chip U2, the model of opto-coupler chip U1
The cost of TLP185, integrated chip are low, low in energy consumption, and replace numerous components, and integration degree is high, small in size, assembling, maintenance
Deng all very convenient.
Preferably, the triode T1 is PNP type triode.
Preferably, the resistance value of the input resistance is 50 Ω, and the control signal of matching Microcomputer Protection output reduces control type
Decaying number in transmission process.
Preferably, two ends of the thyristor SCR1 are also parallel with resistance R9, capacitor C3, the resistance R9, capacitor
C3 is connected in series, and plays the role of protecting thyristor SCR1.
Preferably, the resistance R6 is slide rheostat, can be realized the correction to zero-pressure integration trigger chip U2.
The AC control circuit for Microcomputer Protection of the utility model, working principle are as follows: the control of Microcomputer Protection output
Signal processed is output to zero-pressure integration trigger chip U2 mulberry, amplifies by triode T1 after opto-coupler chip U1 isolation
Afterwards, triggering thyristor SCR1 conducting, load Rs work in the supply lines of alternating current.
In conclusion the AC control circuit for Microcomputer Protection of the utility model, is isolated by opto-coupler chip U1 and is controlled
Signal processed and trigger signal, security reliability increases, and increases zero-pressure integration trigger chip U2, realizes triggering thyristor, from
And alternating current is controlled to load for power-off, easy to control, circuit is simple, and small in size, low in energy consumption, secure safety is high, has
Good application prospect.
The basic principles and main features and advantage of the utility model have been shown and described above.The technical staff of the industry
It should be appreciated that the present utility model is not limited to the above embodiments, the above embodiments and description only describe this
The principle of utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model also has various change
And improvement, these various changes and improvements fall within the scope of the claimed invention.The utility model requires protection scope
It is defined by the appending claims and its equivalent thereof.
Claims (7)
1. a kind of AC control circuit for Microcomputer Protection, it is characterised in that: including opto-coupler chip U1, zero-pressure integration trigger core
Piece U2 and thyristor SCR1,
The positive input terminal of the opto-coupler chip U1 is connected by input resistance R1 with the control output end of Microcomputer Protection, the light
The negative input end of coupling chip U1 is connected to the ground；
The positive output end of the opto-coupler chip U1 passes through the first pin of resistance R2 and zero-pressure integration trigger chip U2, second pin
It is connected jointly, the first pin of the zero-pressure integration trigger chip U2 also passes through resistance R3 and is connected with the firewire of alternating current,
Third pin, the 7th pin of the zero-pressure integration trigger chip U2 passes through the firewire of resistance R4, resistance R5 and alternating current respectively
It is connected, the firewire of the alternating current is also connected with the 4th pin, the 5th pin of zero-pressure integration trigger chip U2, the light
The negative output terminal of coupling chip U1 is connected to the ground,
The firewire of the alternating current is connected to the ground by capacitor C1, and the third pin of the zero-pressure integration trigger chip U2 is also logical
It crosses resistance R6 to be connected to the ground, the 8th pin of the zero-pressure integration trigger chip U2 is connected to the ground, the integrated touching of the zero-pressure
The 6th pin of hair chip U2 is connected by resistance R7 with the zero curve of alternating current, and the 6th of the zero-pressure integration trigger chip U2 the
Pin also passes through capacitor C2 and is connected with the firewire of alternating current, the 7th pin of the zero-pressure integration trigger chip U2 also with three poles
The base stage of pipe T1 is connected, and the emitter of the triode T1 is connected with the gate pole of thyristor SCR1, the thyristor SCR1
One end be connected with the firewire of alternating current, the other end of the thyristor SCR1 pass through load Rs and the firewire of alternating current zero
Line is connected, and the collector of the triode T1 is connected to the ground by resistance R8；
The other end of the thyristor SCR1 is also in series with lighting pilot lamp L1, and switch is in series on the firewire of the alternating current
S1, fuse F1.
2. a kind of AC control circuit for Microcomputer Protection according to claim 1, it is characterised in that: the zero-pressure collection
At the model MFC8070 of flip chip U2.
3. a kind of AC control circuit for Microcomputer Protection according to claim 1, it is characterised in that: the optocoupler core
The model TLP185 of piece U1.
4. a kind of AC control circuit for Microcomputer Protection according to claim 1, it is characterised in that: the triode
T1 is PNP type triode.
5. a kind of AC control circuit for Microcomputer Protection according to claim 1, it is characterised in that: the input electricity
The resistance value of resistance is 50 Ω.
6. a kind of AC control circuit for Microcomputer Protection according to claim 1, it is characterised in that: the thyristor
Two ends of SCR1 are also parallel with resistance R9, capacitor C3, and the resistance R9, capacitor C3 are connected in series.
7. a kind of AC control circuit for Microcomputer Protection according to claim 1, it is characterised in that: the resistance R6
For slide rheostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821896842.XU CN208971117U (en) | 2018-11-19 | 2018-11-19 | A kind of AC control circuit for Microcomputer Protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821896842.XU CN208971117U (en) | 2018-11-19 | 2018-11-19 | A kind of AC control circuit for Microcomputer Protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208971117U true CN208971117U (en) | 2019-06-11 |
Family
ID=66765537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821896842.XU Expired - Fee Related CN208971117U (en) | 2018-11-19 | 2018-11-19 | A kind of AC control circuit for Microcomputer Protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208971117U (en) |
-
2018
- 2018-11-19 CN CN201821896842.XU patent/CN208971117U/en not_active Expired - Fee Related
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| 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: 20190611 Termination date: 20211119 |