CN202548210U - Phase sequence detection circuit for three-phase electricity - Google Patents
Phase sequence detection circuit for three-phase electricity Download PDFInfo
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- CN202548210U CN202548210U CN2012200704788U CN201220070478U CN202548210U CN 202548210 U CN202548210 U CN 202548210U CN 2012200704788 U CN2012200704788 U CN 2012200704788U CN 201220070478 U CN201220070478 U CN 201220070478U CN 202548210 U CN202548210 U CN 202548210U
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Abstract
The utility model discloses a phase sequence detection circuit for three-phase electricity. The phase sequence detection circuit comprises a voltage reduction current-limiting module, a photoelectric coupling isolation module, a waveform shaping module and a control computer chip, wherein the voltage reduction current-limiting module is used for performing voltage reduction and current limit on a three-phase voltage signal and transmitting the three-phase voltage signal to the photoelectric coupling module; the photoelectric coupling isolation module is used for performing photoelectric isolation on a three-phase power supply and transmitting the three-phase power supply to the waveform shaping module; and the waveform shaping module is used for shaping waveforms to form rectangular waves and transmitting the rectangular waves to the control computer chip. Compared with the prior art, the phase sequence detection circuit has the advantages that the three-phase electricity can be acquired to be processed and is transmitted to a singlechip computer chip, so that the problems of phase sequence errors, open phase, phase reversal and the like are solved in time, accidents in operation are avoided, and the normal running of a machine tool is ensured.
Description
Technical field
The utility model relates to a kind of three-phase electricity circuit of testing the phase sequence, belongs to the technical field of circuit emergency circumstance protection.
Background technology
In service at lathe if phenomenons such as reverse phase sequence, phase shortage appear in the three-phase electricity of power supply, can cause safe stories such as lathe can't move, motor scaling loss, yet series of solutions not in the prior art can't satisfy people's demand.
The utility model content
It is a kind of through three-phase electricity is detected that the purpose of the utility model is to provide, and in time finds the circuit of testing the phase sequence of phenomenons such as phase sequence is incorrect, phase shortage, solves the shortcoming that prior art exists.
The utility model adopts following technical scheme to realize:
A kind of three-phase electricity circuit of testing the phase sequence is characterized in that, this testing circuit comprises step-down current limliting module, photoelectricity coupling isolation module, waveform-shaping module and the control computer chip that links to each other successively through lead, wherein:
Said step-down current limliting module is used for three-phase voltage signal is carried out the step-down current limliting and is transferred to the photoelectricity coupling module;
Said photoelectricity coupling isolation module is used for three-phase supply is carried out the photoelectricity isolation and sends waveform-shaping module to;
Said waveform-shaping module is used for wave shaping is square wave and is transferred to the control computer chip.
Further, said step-down current limliting module is made up of six resistance, links to each other with three live wires of three-phase electricity respectively after wherein per two resistance parallel connections;
Said photoelectricity coupling isolation module is made up of three photoelectricity coupling chips; The elementary anode pin of said photoelectricity coupling chip respectively with said step-down current limliting module in resistance after two parallel connections link to each other; Between negative electrode that each photoelectricity coupling chip is elementary and the anode pin respectively cross-over connection one diode is arranged; The positive pole of said diode and negative pole are connected on photoelectricity coupling chip elementary the negative electrode pin and anode pin; And the positive pole of diode also is electrically connected through lead each other, and the output pin of each photoelectricity coupling chip links to each other with waveform-shaping module with capacitance series connection back with a current-limiting resistance respectively.
Further, the model of said photoelectricity coupling chip is 6N139, and said waveform-shaping module is a Schmidt trigger, and the model of this Schmidt trigger is 74HC14D.
The one-chip computer chip handled and be sent to the circuit of testing the phase sequence of the utility model can to the three-phase electricity that collects, and in time finds problems such as phase sequence mistake, phase shortage, paraphase, prevents the generation of security incident, ensures the normal operation of lathe.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model circuit of testing the phase sequence.
Fig. 2 is the circuit theory diagrams of the utility model circuit of testing the phase sequence.
Embodiment
Through facing the description of embodiment down; To help public understanding the utility model more; But can't be regarded as restriction by the concrete embodiment that the applicant is given to the utility model technical scheme, any definition to parts or technical characterictic change and/or to one-piece construction do form but not the conversion of essence all should be regarded as the protection domain that technical scheme limited of the utility model.
As shown in Figure 1; The three-phase electricity circuit of testing the phase sequence; Comprise the step-down current limliting module 1, photoelectricity coupling isolation module 2, waveform-shaping module 3 and the control computer chip that link to each other successively through lead; Step-down current limliting module 1 be used for three-phase voltage electric current carry out the step-down current limliting and be transferred to photoelectricity coupling module 2; Photoelectricity coupling isolation module 2 is used for three-phase supply is carried out the photoelectricity isolation and sends waveform-shaping module 3 to, and waveform-shaping module 3 is used for wave shaping is square wave and is transferred to the control computer chip that the control computer chip can be selected single-chip microcomputer for use.
As shown in Figure 2; Resistance R 11 links to each other with the W of three-phase electricity with resistance R 12 parallel connection backs one end; The other end is connected on the elementary anode pin A of photoelectric coupled device U1, and resistance R 21 links to each other with the V of three-phase electricity with resistance R 22 parallel connection backs one end, and the other end is connected on the elementary anode pin A of photoelectric coupled device U2; Resistance R 31 links to each other with the U of three-phase electricity with resistance R 32 parallel connection backs one end; The other end is connected on the anode pin A of photoelectric coupled device U3, and the model of three photoelectric coupled devices is 6N139, and diode D1 is connected across between the anode pin A and negative electrode pin B of photoelectric coupled device U1; Diode D2 is connected across between the anode pin A and negative electrode pin B of photoelectric coupled device U2; Diode D3 is connected across between the anode pin A and negative electrode pin B of photoelectric coupled device U3, and the positive pole of diode D1, D2, D3 all links to each other through lead, the zero line in the virtual three-phase and four-line electric power system.
After connecting successively, resistance R 13, filter capacitor C11 and filter capacitor C12 be connected between the VCC pin and VB pin of photoelectric coupled device U1; Biasing resistor R14 is connected across the two ends of filter capacitor C12; Pull-up resistor R16 one end connects the power supply of 3.3V; The other end is connected between the VO pin of current-limiting resistance R15 and photoelectric coupled device U1, and capacitance C13 one end links to each other with current-limiting resistance R15, and the other end links to each other with Schmidt trigger 3; Pull-up resistor R26 one end connects the power supply of 3.3V, and the other end is connected between the VO pin of current-limiting resistance R25 and photoelectric coupled device U2, and capacitance C22 one end links to each other with current-limiting resistance R25, and the other end links to each other with Schmidt trigger 3; Pull-up resistor R36 one end connects the power supply of 3.3V, and the other end is connected between the VO pin of current-limiting resistance R35 and photoelectric coupled device U3, and capacitance C32 one end links to each other with current-limiting resistance R35, and the other end links to each other with Schmidt trigger 3.
Filter capacitor C11 is a power filter; Resistance R 13 is given the power supply of secondary Vcc end, target VB process filter capacitor C12 and the biasing resistor R14 ground connection of photoelectrical coupler U1; Secondary output end mouth VO is through the power supply of pull-up resistor R16 connection 3.3V, and secondary output end mouth VO also links to each other with capacitance C13, Schmidt trigger 3 through current-limiting resistance R15.
Resistance R 23 is given the power supply of secondary Vcc end, target VB process filter capacitor C21 and the biasing resistor R24 ground connection of photoelectrical coupler U2; Secondary output end mouth VO is through the power supply of pull-up resistor R26 connection 3.3V, and secondary output end mouth VO also links to each other with capacitance C22, Schmidt trigger 3 through current-limiting resistance R25.
Resistance R 33 is given the power supply of secondary Vcc end, target VB process filter capacitor C31 and the biasing resistor R34 ground connection of photoelectrical coupler U3; Secondary output end mouth VO is through the power supply of pull-up resistor R36 connection 3.3V, and secondary output end mouth VO also links to each other with capacitance C32, Schmidt trigger 3 through current-limiting resistance R35.
Three-phase electricity is through step-down, current limliting; Be coupled to Schmidt trigger by LMDS Light Coupled Device; The three-phase electricity of sine wave is shaped as the square wave that single-chip microcomputer can receive, the situation of three-phase electricity phase shortage, misphase is monitored in real time, guarantee the normal operation of lathe by single-chip microcomputer.This circuit of testing the phase sequence also provides the trigger pip of phase-shift control angle, reference signal is provided, the trigger pip of controlling angle is provided for the full-bridge of electric brake or half-bridge silicon controlled module for power-saving running for the used inverse parallel controllable silicon of soft start.
Certainly; The utility model can also have other various embodiments; Under the situation that does not deviate from the utility model spirit and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (3)
1. a three-phase electricity circuit of testing the phase sequence is characterized in that, this testing circuit comprises step-down current limliting module, photoelectricity coupling isolation module, waveform-shaping module and the control computer chip that links to each other successively through lead, wherein:
Said step-down current limliting module is used for three-phase voltage signal is carried out the step-down current limliting and is transferred to the photoelectricity coupling module;
Said photoelectricity coupling isolation module is used for three-phase supply is carried out the photoelectricity isolation and sends waveform-shaping module to;
Said waveform-shaping module is used for wave shaping is square wave and is transferred to the control computer chip.
2. three-phase electricity circuit of testing the phase sequence according to claim 1 is characterized in that, said step-down current limliting module is made up of six resistance, links to each other with three live wires of three-phase electricity respectively after wherein per two resistance parallel connections;
Said photoelectricity coupling isolation module is made up of three photoelectricity coupling chips; The elementary anode pin of said photoelectricity coupling chip respectively with said step-down current limliting module in resistance after two parallel connections link to each other; Between negative electrode that each photoelectricity coupling chip is elementary and the anode pin respectively cross-over connection one diode is arranged; The positive pole of said diode and negative pole are connected on photoelectricity coupling chip elementary the negative electrode pin and anode pin; And the positive pole of diode also is electrically connected through lead each other, and the output pin of each photoelectricity coupling chip links to each other with waveform-shaping module with capacitance series connection back with a current-limiting resistance respectively.
3. three-phase electricity circuit of testing the phase sequence according to claim 2 is characterized in that, the model of said photoelectricity coupling chip is 6N139, and said waveform-shaping module is a Schmidt trigger, and the model of this Schmidt trigger is 74HC14D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200704788U CN202548210U (en) | 2012-02-29 | 2012-02-29 | Phase sequence detection circuit for three-phase electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200704788U CN202548210U (en) | 2012-02-29 | 2012-02-29 | Phase sequence detection circuit for three-phase electricity |
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| Publication Number | Publication Date |
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| CN202548210U true CN202548210U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200704788U Expired - Fee Related CN202548210U (en) | 2012-02-29 | 2012-02-29 | Phase sequence detection circuit for three-phase electricity |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067884A (en) * | 2015-08-25 | 2015-11-18 | 上海华兴数字科技有限公司 | Three-phase alternating-current supply phase detection circuit |
| CN106546832A (en) * | 2016-12-08 | 2017-03-29 | 珠海格力电器股份有限公司 | A kind of detection means and its using method of three phase mains |
| CN109030965A (en) * | 2018-05-31 | 2018-12-18 | 桂林航天工业学院 | A kind of three-phase electric power open phase detection device with networking function |
| CN110596475A (en) * | 2019-09-25 | 2019-12-20 | 东莞市华博精测仪表科技有限公司 | Measuring instrument with phase sequence testing function |
-
2012
- 2012-02-29 CN CN2012200704788U patent/CN202548210U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067884A (en) * | 2015-08-25 | 2015-11-18 | 上海华兴数字科技有限公司 | Three-phase alternating-current supply phase detection circuit |
| CN106546832A (en) * | 2016-12-08 | 2017-03-29 | 珠海格力电器股份有限公司 | A kind of detection means and its using method of three phase mains |
| CN109030965A (en) * | 2018-05-31 | 2018-12-18 | 桂林航天工业学院 | A kind of three-phase electric power open phase detection device with networking function |
| CN109030965B (en) * | 2018-05-31 | 2024-02-09 | 桂林航天工业学院 | With network function three-phase electric open-phase detection device |
| CN110596475A (en) * | 2019-09-25 | 2019-12-20 | 东莞市华博精测仪表科技有限公司 | Measuring instrument with phase sequence testing function |
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| C14 | Grant of patent or utility model | ||
| 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: 20121121 Termination date: 20180229 |