CN207611095U - A kind of three-phase power supply phase sequence detection circuit - Google Patents
A kind of three-phase power supply phase sequence detection circuit Download PDFInfo
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- CN207611095U CN207611095U CN201721629641.9U CN201721629641U CN207611095U CN 207611095 U CN207611095 U CN 207611095U CN 201721629641 U CN201721629641 U CN 201721629641U CN 207611095 U CN207611095 U CN 207611095U
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- 238000000819 phase cycle Methods 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 16
- 238000010168 coupling process Methods 0.000 claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model is related to a kind of three-phase power supply phase sequence detection circuit, three-phase mains voltage after Phototube Coupling by sine wave shaped at square-wave signal, be sent to single-chip microcomputer input mouth using RC circuits and phase inverter.It is compared to determine the phase sequence of three phase mains by the cycle detection result to the ports P1.Advantageous effect is, simple in structure with microcontroller core in order to control, component used is few, greatly simplifies the circuit of testing the phase sequence of three phase mains, improves anti-interference ability, real-time monitoring by microcontroller to three phase mains waveform simultaneously, also improves the accuracy of testing result.
Description
Technical field
The utility model is related to a kind of power sense circuit, more particularly to a kind of three-phase power supply phase sequence detection circuit.
Background technology
Electronics, electric power, instrument, automatically control with the phase sequence that in the equipment such as power electronics, generally requires detection power supply, it is special
Be not in power electronic equipment, since the calculating of phase shifting angle in phase shifting control has to phase and phase sequence according to power supply, because
And it don't fail to be reliable and stable.And it is in use, or general circuit of testing the phase sequence is bulky or is easily disturbed, cause
There is great unstability in the process of running in system.
Due to now in electronics, electric power, instrument, automatically control with being used in the equipment such as power electronics and be with one-chip computer
The embedded system of representative has become as control core for universal development trend, therefore, employs new technology and makes new phase
Sequence testing circuit also has become the trend for development.
Invention content
In view of the shortcomings of the prior art, the utility model provides a kind of three-phase power supply phase sequence detection circuit, with list
Piece machine core in order to control, simple in structure, component used is few, can greatly improve anti-interference and accuracy in detection process,
The technical scheme adopted is that a kind of three-phase power supply phase sequence detection circuit, it is characterised in that：The U phases of three phase mains are respectively with two
The cathode of pole pipe D3, D3,1 foot of optical coupling isolator U1, U2 are connected, and V phases are connected with resistance R1, and the other end of R1 connects diode
The anode of the cathode of D1, diode D1 is connected with 2 feet of the anode of diode D3, optical coupling isolator U1 respectively, W phases and resistance R2
Be connected, the cathode of the other end of R2 connection diode D2, the anode of diode D2 respectively with the anode of diode D4, light-coupled isolation
2 feet of device U2 are connected；4 feet of optical coupling isolator U1 connect VCC power supplys, 3 feet pass through the filter circuit being made of resistance R3, capacitance C1
It is connected afterwards with resistance R5, the other end of resistance R5 connects 13 foot of input terminal of phase inverter F, 12 foot of output end and monolithic of phase inverter F
The I/O port P1.0 connections of machine, 4 feet of optical coupling isolator U2 connect VCC power supplys；3 feet pass through the filter being made of resistance R4, capacitance C2
It is connected with resistance R6 after wave circuit, the other end of resistance R6 connects 11 foot of input terminal of phase inverter E, 10 foot of output end of phase inverter E
It is connect with the I/O port P1.1 of microcontroller.
Principle be three-phase mains voltage after Phototube Coupling by sine wave shaped at square-wave signal, using RC circuits and
Phase inverter is sent to single-chip microcomputer input mouth, is compared to determine the phase of three phase mains by the cycle detection result to the ports P1
Sequence.
The utility model has the beneficial effects that：With microcontroller core in order to control, simple in structure, component used is few, greatly
The circuit of testing the phase sequence for simplifying three phase mains, improve anti-interference ability, while by microcontroller to three phase mains waveform
Real-time monitoring, also improve the accuracy of testing result.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model；
Fig. 2 is the detection method flow chart of the utility model.
Specific implementation mode
As shown in Figure 1, a kind of three-phase power supply phase sequence detection circuit, the U phases of three phase mains are negative with diode D3, D3 respectively
Pole, 1 foot of optical coupling isolator U1, U2 are connected, and V phases are connected with resistance R1, the cathode of the other end connection diode D1 of R1, two poles
The anode of pipe D1 is connected with 2 feet of the anode of diode D3, optical coupling isolator U1 respectively, and W phases are connected with resistance R2, and R2's is another
The cathode of end connection diode D2, the positive 2 foot phases with the anode of diode D4, optical coupling isolator U2 respectively of diode D2
Even；4 feet of optical coupling isolator U1 connect VCC power supplys, 3 feet after the filter circuit being made of resistance R3, capacitance C1 with resistance R5
It is connected, the other end of resistance R5 connects 13 foot of input terminal of phase inverter F, the I/O port of output end 12 foot and microcontroller of phase inverter F
4 feet of P1.0 connections, optical coupling isolator U2 connect VCC power supplys；3 feet after the filter circuit being made of resistance R4, capacitance C2 with
Resistance R6 is connected, and the other end of resistance R6 connects 11 foot of input terminal of phase inverter E, 10 foot of output end of phase inverter E and microcontroller
I/O port P1.1 connections.
As shown in Fig. 2, detection method is as follows,
1）, judge whether port P1.0 is high level, if port P1.0 be high level, acquire port P1.0 failing edges,
Be delayed 18ms, judges whether port P1.1 is low level, and if low level, then the phase sequence of this three phase mains is just otherwise power supply
Phase sequence be anti-；
2）If, port P1.0 be low level, acquire the rising edge of port P1.0, be delayed 10ms, judges that port P1.1 is
No is low level, and if low level, then the phase sequence of this three phase mains is just that otherwise the phase sequence of power supply is anti-.
Claims (1)
1. a kind of three-phase power supply phase sequence detection circuit, it is characterised in that：The U phases of three phase mains are negative with diode D3, D3 respectively
Pole, 1 foot of optical coupling isolator U1, U2 are connected, and V phases are connected with resistance R1, the cathode of the other end connection diode D1 of R1, two poles
The anode of pipe D1 is connected with 2 feet of the anode of diode D3, optical coupling isolator U1 respectively, and W phases are connected with resistance R2, and R2's is another
The cathode of end connection diode D2, the positive 2 foot phases with the anode of diode D4, optical coupling isolator U2 respectively of diode D2
Even；4 feet of optical coupling isolator U1 connect VCC power supplys, 3 feet after the filter circuit being made of resistance R3, capacitance C1 with resistance R5
It is connected, the other end of resistance R5 connects 13 foot of input terminal of phase inverter F, the I/O port of output end 12 foot and microcontroller of phase inverter F
4 feet of P1.0 connections, optical coupling isolator U2 connect VCC power supplys；3 feet after the filter circuit being made of resistance R4, capacitance C2 with
Resistance R6 is connected, and the other end of resistance R6 connects 11 foot of input terminal of phase inverter E, 10 foot of output end of phase inverter E and microcontroller
I/O port P1.1 connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721629641.9U CN207611095U (en) | 2017-11-29 | 2017-11-29 | A kind of three-phase power supply phase sequence detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721629641.9U CN207611095U (en) | 2017-11-29 | 2017-11-29 | A kind of three-phase power supply phase sequence detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207611095U true CN207611095U (en) | 2018-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721629641.9U Expired - Fee Related CN207611095U (en) | 2017-11-29 | 2017-11-29 | A kind of three-phase power supply phase sequence detection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN207611095U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796998A (en) * | 2017-11-29 | 2018-03-13 | 中环天仪股份有限公司 | A kind of three-phase power supply phase sequence detection circuit and detection method |
-
2017
- 2017-11-29 CN CN201721629641.9U patent/CN207611095U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796998A (en) * | 2017-11-29 | 2018-03-13 | 中环天仪股份有限公司 | A kind of three-phase power supply phase sequence detection circuit and detection method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180713 |