CN207832987U - A kind of open phases of three-phase power source reverse phase detection circuit - Google Patents
A kind of open phases of three-phase power source reverse phase detection circuit Download PDFInfo
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- CN207832987U CN207832987U CN201721890773.7U CN201721890773U CN207832987U CN 207832987 U CN207832987 U CN 207832987U CN 201721890773 U CN201721890773 U CN 201721890773U CN 207832987 U CN207832987 U CN 207832987U
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- optocouplers
- power source
- detection circuit
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Abstract
The utility model provides a kind of open phases of three-phase power source reverse phase detection circuit, and three-phase circuit includes A phases, B phases and C phases, it is characterised in that：Including two diodes, two optocouplers and a microcontroller, A phases and B phases are electrically connected to the luminous tube anode of two optocouplers after two diodes respectively, the luminous tube cathode of two optocouplers is electrically connected with C, the signal output end of two optocouplers and the monolithic mechatronics.
Description
Technical field
The utility model is related to monitoring point road technique field more particularly to a kind of open phases of three-phase power source reverse phase detection electricity
Road.
Background technology
Current much electric appliances using three phase mains are required for being detected the defect and reverse phase of three phase mains, especially
In the application scenario of three phase electric machine, using the equipment normal need of three-phase electricity power supply ensure the phase sequence of three-phase electricity correctly with completely.
In motor operation, power phase shortage can cause motor operation unsmooth or stall, and then burn motor, power supply reverse phase
Motor can be made just to change reversion, reversion, which becomes, to be rotated forward, and then is damaged equipment or caused personal safety.For common rolling screen door fire
For fire resisting shutter door motor, with greater need for attention this respect problem.Phase shortage and reverse phase correct and that judge three phase mains in time
Situation is the basic guarantee of security appliance work.In addition, since rolling screen door is widely used in many places, it is anti-to reduce phase shortage
Phase detecting circuit cost ensures that people's property safety is most important to the universal, practical of the function.
Utility model content
The utility model provides a kind of open phases of three-phase power source detection circuit of circuit structure simple and stable.
In order to reach the purpose, the utility model adopts the following technical solution：
A kind of open phases of three-phase power source reverse phase detection circuit, three-phase circuit include A phases, B phases and C phases, it is characterised in that：Including
Two diodes, two optocouplers and a microcontroller, A phases and B phases are electrically connected to two after two diodes respectively
The luminous tube anode of a optocoupler, the luminous tube cathode of two optocouplers are electrically connected with C, the signal of two optocouplers
Output end and the monolithic mechatronics.
As a preferred embodiment, being electrically connected with first resistor between the diode and the optocoupler that A is connected.
As a preferred embodiment, being electrically connected with second resistance between the diode and the optocoupler that B is connected.
As a preferred embodiment, the emitter ground connection of the optocoupler.
As a preferred embodiment, the collector of two optocouplers is electrically connected with 3rd resistor and the 4th resistance respectively.
As a preferred embodiment, the collector of two optocouplers is connect with the peripheral port of the microcontroller.
As a preferred embodiment, the collector of two optocouplers is connected with power supply.
To sum up, the utility model has the following advantages：Phase difference between A phases and C phases and the phase between B phases and C phases
Poor different, the time of the luminous tube of two groups of optocouplers begun to turn on can be different, and microcontroller is started by analyzing this two groups of optocouplers
The time interval of conducting, so that it may to judge phase shortage, the inverse case of three phase mains；The circuit structure is simple, and cost is relatively low；Light
High pressure alternating current is isolated in coupling, securely and reliably.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Specific implementation mode
The utility model is described in further detail for middle embodiment below in conjunction with the accompanying drawings.
A kind of open phases of three-phase power source reverse phase detection circuit as shown in Figure 1, three-phase circuit include A phases, B phases and C phases, spy
Sign is：Including two diodes, two optocouplers and a microcontroller, A phases and B phases are electrically connected after two diodes respectively
It is connected to the luminous tube anode of two optocouplers, the luminous tube cathode of two optocouplers is electrically connected with C, the signal output end of two optocouplers
With monolithic mechatronics.Two diodes are respectively D1 and D2, and two optocouplers are respectively U1 and U2.Phase between A phases and C phases
Difference is different from the phase difference between B phases and C phases, and the time of the luminous tube of two groups of optocouplers begun to turn on can be different, microcontroller
The time interval begun to turn on by analyzing this two groups of optocouplers, it can be determined that go out phase shortage, the inverse case of three phase mains.The detection
Method can adapt to the three phase mains that frequency is 50Hz and 60Hz simultaneously.
It is electrically connected with first resistor R1 between A the diode D1 being connected and optocoupler U1.The diode D2 and light that B is connected
Second resistance R3 is electrically connected between coupling U2.The emitter of optocoupler is grounded.The collector of two optocouplers respectively with 3rd resistor R2
With the 4th resistance R4 electrical connections.
The peripheral port connection of the collector and microcontroller of two optocouplers.Microcontroller passes through to two groups of optocoupler output signals
Variance analysis can realize the judgement to open phases of three-phase power source and reverse phase well.The collector of two optocouplers is connected with power supply.It should
Detection circuit is simple, at low cost, the common rolling screen door suitable for using on a large scale and fire resisting shutter door motor and to old volume
The transformation of curtain door.
Described above is only the explanation to the utility model so that those of ordinary skill in the art's can completely implements this
Scheme, but be not limitations of the present invention, those skilled in the art can be as needed after reading this specification
The modification of not creative contribution is made to the present embodiment, these are all without creative modification.But as long as in this practicality
It is all protected by Patent Law in novel right.
Claims (7)
1. a kind of open phases of three-phase power source reverse phase detection circuit, three-phase circuit includes A phases, B phases and C phases, it is characterised in that：Including two
A diode, two optocouplers and a microcontroller, A phases and B phases are electrically connected to two after two diodes respectively
The luminous tube anode of the optocoupler, the luminous tube cathode of two optocouplers are electrically connected with C, and the signal of two optocouplers is defeated
Outlet and the monolithic mechatronics.
2. a kind of open phases of three-phase power source reverse phase detection circuit according to claim 1, it is characterised in that：The institute that A is connected
It states and is electrically connected with first resistor between diode and the optocoupler.
3. a kind of open phases of three-phase power source reverse phase detection circuit according to claim 1, it is characterised in that：The institute that B is connected
It states and is electrically connected with second resistance between diode and the optocoupler.
4. a kind of open phases of three-phase power source reverse phase detection circuit according to claim 1, it is characterised in that：The hair of the optocoupler
Emitter grounding.
5. a kind of open phases of three-phase power source reverse phase detection circuit according to claim 1, it is characterised in that：Two optocouplers
Collector be electrically connected respectively with 3rd resistor and the 4th resistance.
6. a kind of open phases of three-phase power source reverse phase detection circuit according to claim 1, it is characterised in that：Two optocouplers
Collector connect with the peripheral port of the microcontroller.
7. a kind of open phases of three-phase power source reverse phase detection circuit according to claim 1, it is characterised in that：Two optocouplers
Collector be connected with power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721890773.7U CN207832987U (en) | 2017-12-29 | 2017-12-29 | A kind of open phases of three-phase power source reverse phase detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721890773.7U CN207832987U (en) | 2017-12-29 | 2017-12-29 | A kind of open phases of three-phase power source reverse phase detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207832987U true CN207832987U (en) | 2018-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721890773.7U Active CN207832987U (en) | 2017-12-29 | 2017-12-29 | A kind of open phases of three-phase power source reverse phase detection circuit |
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| CN (1) | CN207832987U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976643A (en) * | 2017-12-29 | 2018-05-01 | 福建安麟智能科技股份有限公司 | A kind of anti-phase detection circuit of open phases of three-phase power source and its detection method |
-
2017
- 2017-12-29 CN CN201721890773.7U patent/CN207832987U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976643A (en) * | 2017-12-29 | 2018-05-01 | 福建安麟智能科技股份有限公司 | A kind of anti-phase detection circuit of open phases of three-phase power source and its detection method |
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