CN201569706U - Phase sequence detection circuit of three-phase power supply - Google Patents
Phase sequence detection circuit of three-phase power supply Download PDFInfo
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- CN201569706U CN201569706U CN2009202830938U CN200920283093U CN201569706U CN 201569706 U CN201569706 U CN 201569706U CN 2009202830938 U CN2009202830938 U CN 2009202830938U CN 200920283093 U CN200920283093 U CN 200920283093U CN 201569706 U CN201569706 U CN 201569706U
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Abstract
A phase sequence detection circuit of a three-phase power supply comprises a first phase sequence detection circuit and a second phase sequence detection circuit. The phase sequence detection circuit adopts two photocouplers to generate square wave signals in insulated mode, the signals are further fed to a CPU for processing after filter smoothing, the CPU only needs to calculate the time difference of two path of circuits, time difference of a rising edge (or a descending edge) of the two square waves is set by software so as to pass through the comparison of a calculating value and a setting value, thereby judging the phase sequence relationship of a three-phase power supply and detecting open phase. The utility model further introduces a complex power concept, and uses a capacitive reactance, namely a first capacitor and a fourth capacitor, to replace a resistor, the power is only 2W-4W, and the volume of a circuit is reduced. The phase sequence detection circuit has simple circuits and low cost. Electric characteristics are stable and are not easily disturbed.
Description
Technical field
The utility model relates to the circuit of testing the phase sequence of three-phase supply.
Background technology
A phase, B phase and C phase are arranged in the three-phase supply.If the phase sequence power supply according to A, B, C inserts motor, motor is just to change; And inserting motor according to A, C, B phase sequence power supply, motor reverses exactly.Therefore often need the phase sequence of three-phase supply be detected at industrial control field, to prevent the motor counter-rotating.
Present phase sequence detecting method mainly contains two kinds: the one, and adopt software that phase sequence is detected, but the opering characteristic of electric apparatus instability of software detection is subject to disturb.Another kind is to adopt external phase-sequence detector to control the phase sequence of three-phase supply.It can detect phenomena of the failure such as the phase shortage that occurs in the commercial power, anti-phase, imbalance of three-phase voltage, superpotential, under-voltage, and in time consumer is disconnected, and plays a protective role.When phase sequence is right, phase-sequence detector is with regard to adhesive; Phase sequence is not right, just not adhesive of phase-sequence detector.But because the equipment volume of phase-sequence detector is bigger, cost is higher, is unfavorable for applying.
The content of utility model
At the above-mentioned deficiency of the phase sequence detecting method of existing three-phase supply, the applicant has carried out improving research, provides that a kind of circuit is simple, with low cost, the stable circuit of testing the phase sequence that is not subject to the three-phase supply that disturbs of electrical specification.
The technical solution of the utility model is as follows:
A kind of circuit of testing the phase sequence of three-phase supply comprises first circuit of testing the phase sequence and second circuit of testing the phase sequence;
Described first circuit of testing the phase sequence is made of first photoelectrical coupler, first resistance, second resistance, the 3rd resistance, the 4th resistance, first electric capacity, second electric capacity and the 3rd electric capacity; First phase sequence order of three-phase supply is through first electric capacity, connect into the electrode input end of first photoelectrical coupler behind first resistance, second phase sequence of three-phase supply connects the negative input of first photoelectrical coupler, be connected between the electrode input end and negative input of first photoelectrical coupler after second resistance and the second electric capacity parallel connection, the collector output of first photoelectrical coupler connects power supply, the emitter output terminal of first photoelectrical coupler meets CPU behind the 3rd resistance, in parallel with the 3rd resistance again after the 4th resistance and the 3rd capacitances in series, the intermediate point ground connection of the 4th resistance and the 3rd electric capacity;
Described second circuit of testing the phase sequence is made of second photoelectrical coupler, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 4th electric capacity, the 5th electric capacity and the 6th electric capacity; First phase sequence order of three-phase supply is through the 4th electric capacity, connect into the electrode input end of second photoelectrical coupler behind the 5th resistance, the third phase preface of three-phase supply connects the negative input of second photoelectrical coupler, be connected between the electrode input end and negative input of second photoelectrical coupler after the 6th resistance and the 5th electric capacity parallel connection, the collector output of second photoelectrical coupler connects power supply, the emitter output terminal of second photoelectrical coupler meets CPU behind the 7th resistance, in parallel with the 7th resistance again after the 8th resistance and the 6th capacitances in series, the intermediate point ground connection of the 8th resistance and the 6th electric capacity.
Useful technique effect of the present utility model is:
The utility model adopts the two-way photoelectric coupler isolation to produce square-wave signal, giving CPU after popin is slided after filtration again handles, only need to calculate the mistiming of two paths of signals with CPU, mistiming of the rising edge (or negative edge) of two square waves of software setting then, can judge the phase order relation of three-phase supply and detect phase shortage by to the comparison of calculated value with the value of setting.The utility model is also introduced multiple merit notion, uses capacitive reactances, and promptly first electric capacity and the 4th electric capacity replace resistance, and power has only 2W～4W, has reduced the circuit volume.The utility model circuit is simple, and is with low cost.Stable not being subject to of electrical specification disturbed.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further.
Fig. 1 is a circuit diagram of the present utility model.As shown in Figure 1, the utility model comprises first circuit of testing the phase sequence and second circuit of testing the phase sequence.
Described first circuit of testing the phase sequence is made of the first photoelectrical coupler PC1, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, first capacitor C 1, second capacitor C 2 and the 3rd capacitor C 3.The first phase sequence A order of three-phase supply is through first capacitor C 1, connect into the electrode input end A of the first photoelectrical coupler PC1 after first resistance R 1, the second phase sequence B of three-phase supply connects the negative input K of the first photoelectrical coupler PC1, be connected between the electrode input end A and negative input K of the first photoelectrical coupler PC1 after second resistance R 2 and 2 parallel connections of second capacitor C, the collector output C of the first photoelectrical coupler PC1 connects power supply VCC, the emitter output terminal E of the first photoelectrical coupler PC1 produces square-wave signal INT2 and inserts CPU after the 3rd resistance R 3, the 4th resistance R 4 is with in parallel with the 3rd resistance R 3 again after the 3rd capacitor C 3 is connected, the intermediate point ground connection of the 4th resistance R 4 and the 3rd capacitor C 3.
Described second circuit of testing the phase sequence is made of the second photoelectrical coupler PC2, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 4th capacitor C 4, the 5th capacitor C 5 and the 6th capacitor C 6.The first phase sequence A order of three-phase supply is through the 4th capacitor C 4, connect into the electrode input end A of the second photoelectrical coupler PC2 after the 5th resistance R 5, the third phase preface C of three-phase supply connects the negative input K of the second photoelectrical coupler PC2, be connected between the electrode input end A and negative input K of the second photoelectrical coupler PC2 after the 6th resistance R 6 and 5 parallel connections of the 5th capacitor C, the collector output C of the second photoelectrical coupler PC2 connects power supply VCC, the emitter output terminal E of the second photoelectrical coupler PC2 produces square-wave signal INT1 and meets CPU after the 7th resistance R 7, the 8th resistance R 8 is with in parallel with the 7th resistance R 7 again after the 6th capacitor C 6 is connected, the intermediate point ground connection of the 8th resistance R 8 and the 6th capacitor C 6.
Above-described components and parts are the commercial goods, and its marque can see table.
Main components and parts table among Fig. 2:
| Sequence number | The components and parts code name | The components and parts type | Component parameter or |
|
| 1 | R1 | Resistance | 2KΩ1/ |
|
| 2 | R2 | Resistance | 2KΩ1/ |
|
| 3 | | Resistance | 22KΩ | |
| 4 | R4 | Resistance | 47KΩ | |
| 5 | R5 | Resistance | 2KΩ1/4W |
| Sequence number | The components and parts code name | The components and parts type | Component parameter or model |
| 6 | R6 | Resistance | 2KΩ1/4W |
| 7 | R7 | Resistance | 22KΩ |
| 8 | R8 | Resistance | 47KΩ |
| 9 | C1 | Electric capacity | 0.01uF/630V |
| 10 | C2 | Electric capacity | 0.1uF/63V |
| 11 | C3 | Electric capacity | 0.01uF |
| 12 | C4 | Electric capacity | 0.01uF/630V |
| 13 | C5 | Electric capacity | 0.1uF/63V |
| 14 | C6 | Electric capacity | 0.01uF |
| 15 | PC1 | Photoelectrical coupler | TLP620 |
| 16 | PC2 | Photoelectrical coupler | TLP620 |
In actual applications, mistiming of the rising edge (or negative edge) by software setting two square wave INT1, INT2 at first, as the mistiming is set is 40 milliseconds.When mistiming that CPU calculates two square wave INT1, INT2 during less than set 40 milliseconds, the phase sequence of expression three-phase supply is correct, and this moment, motor just changeed; And when mistiming that CPU calculates two square wave INT1, INT2 during greater than set 40 milliseconds, the phase sequence of expression three-phase supply is incorrect, motor counter-rotating this moment.Therefore the utility model can be realized three-phase supply is carried out the function that phase sequence detects.
Above-described only is preferred implementation of the present utility model, and the utility model is not limited to above embodiment.Be appreciated that those skilled in the art under the prerequisite that does not break away from spirit of the present utility model and design, can make other improvement and variation.
Claims (1)
1. the circuit of testing the phase sequence of a three-phase supply is characterized in that comprising first circuit of testing the phase sequence and second circuit of testing the phase sequence;
Described first circuit of testing the phase sequence is made of first photoelectrical coupler (PC1), first resistance (R1), second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), first electric capacity (C1), second electric capacity (C2) and the 3rd electric capacity (C3); First phase sequence order of three-phase supply is through first electric capacity (C1), connect into the electrode input end (A) of first photoelectrical coupler (PC1) behind first resistance (R1), second phase sequence of three-phase supply connects the negative input (K) of first photoelectrical coupler (PC1), be connected on after second resistance (R2) and second electric capacity (C2) parallel connection between the electrode input end (A) and negative input (K) of first photoelectrical coupler (PC1), the collector output (C) of first photoelectrical coupler (PC1) connects power supply, the emitter output terminal (E) of first photoelectrical coupler (PC1) meets CPU behind the 3rd resistance (R3), the 4th resistance (R4) is with in parallel with the 3rd resistance (R3) again after the 3rd electric capacity (C3) is connected, the intermediate point ground connection of the 4th resistance (14) and the 3rd electric capacity (C3);
Described second circuit of testing the phase sequence is made of second photoelectrical coupler (PC2), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), the 8th resistance (R8), the 4th electric capacity (C4), the 5th electric capacity (C5) and the 6th electric capacity (C6); First phase sequence order of three-phase supply is through the 4th electric capacity (C4), connect into the electrode input end (A) of second photoelectrical coupler (PC2) behind the 5th resistance (R5), the third phase preface of three-phase supply connects the negative input (K) of second photoelectrical coupler (PC2), be connected on after the 6th resistance (R6) and the 5th electric capacity (C5) parallel connection between the electrode input end (A) and negative input (K) of second photoelectrical coupler (PC2), the collector output (C) of second photoelectrical coupler (PC2) connects power supply, the emitter output terminal (E) of second photoelectrical coupler (PC2) meets CPU behind the 7th resistance (R7), the 8th resistance (R8) is with in parallel with the 7th resistance (R7) again after the 6th electric capacity (C6) is connected, the intermediate point ground connection of the 8th resistance (R8) and the 6th electric capacity (C6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202830938U CN201569706U (en) | 2009-12-16 | 2009-12-16 | Phase sequence detection circuit of three-phase power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202830938U CN201569706U (en) | 2009-12-16 | 2009-12-16 | Phase sequence detection circuit of three-phase power supply |
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| Publication Number | Publication Date |
|---|---|
| CN201569706U true CN201569706U (en) | 2010-09-01 |
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| CN2009202830938U Expired - Fee Related CN201569706U (en) | 2009-12-16 | 2009-12-16 | Phase sequence detection circuit of three-phase power supply |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262218A (en) * | 2011-06-20 | 2011-11-30 | 宁波奥克斯空调有限公司 | Method for detecting open phases of three-phase power source for compressor |
| CN103308784A (en) * | 2012-03-15 | 2013-09-18 | 辽宁省电力有限公司大连供电公司 | Nuclear phase instrument |
| CN103901358A (en) * | 2012-12-24 | 2014-07-02 | 赐福科技股份有限公司 | Three-phase power supply abnormality detection device |
| 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 |
| CN106546831A (en) * | 2015-09-18 | 2017-03-29 | 承永资讯科技股份有限公司 | The judging phase order devices and methods therefor of three phase mains |
| 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 |
| CN108519561A (en) * | 2018-05-04 | 2018-09-11 | 南京天加环境科技有限公司 | A kind of air-conditioning system power quality detecting system and method |
| CN109839547A (en) * | 2017-11-24 | 2019-06-04 | 深圳市蓝海华腾技术股份有限公司 | A kind of three-phase power supply phase sequence detection circuit |
| CN112019818A (en) * | 2020-09-07 | 2020-12-01 | 山东联合电力产业发展有限公司 | Power line monitoring terminal system |
| CN112269083A (en) * | 2020-10-20 | 2021-01-26 | 江苏新安电器股份有限公司 | Control panel voltage detection and conversion device for automatic test equipment |
| CN116027194A (en) * | 2023-03-29 | 2023-04-28 | 河北水利电力学院 | Motor fault monitoring system |
-
2009
- 2009-12-16 CN CN2009202830938U patent/CN201569706U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262218B (en) * | 2011-06-20 | 2013-08-28 | 宁波奥克斯空调有限公司 | Method for detecting open phases of three-phase power source for compressor |
| CN102262218A (en) * | 2011-06-20 | 2011-11-30 | 宁波奥克斯空调有限公司 | Method for detecting open phases of three-phase power source for compressor |
| CN103308784A (en) * | 2012-03-15 | 2013-09-18 | 辽宁省电力有限公司大连供电公司 | Nuclear phase instrument |
| CN103308784B (en) * | 2012-03-15 | 2016-03-30 | 国网辽宁省电力有限公司大连供电公司 | A kind of nuclear phase instrument |
| CN103901358A (en) * | 2012-12-24 | 2014-07-02 | 赐福科技股份有限公司 | Three-phase power supply abnormality detection device |
| CN106546831A (en) * | 2015-09-18 | 2017-03-29 | 承永资讯科技股份有限公司 | The judging phase order devices and methods therefor of three phase mains |
| CN106546831B (en) * | 2015-09-18 | 2019-09-10 | 承永资讯科技股份有限公司 | The judging phase order devices and methods therefor of three phase mains |
| 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 |
| CN109839547B (en) * | 2017-11-24 | 2024-01-30 | 深圳市蓝海华腾技术股份有限公司 | Three-phase power phase sequence detection circuit |
| CN109839547A (en) * | 2017-11-24 | 2019-06-04 | 深圳市蓝海华腾技术股份有限公司 | A kind of three-phase power supply phase sequence detection circuit |
| 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 |
| CN108519561A (en) * | 2018-05-04 | 2018-09-11 | 南京天加环境科技有限公司 | A kind of air-conditioning system power quality detecting system and method |
| CN112019818B (en) * | 2020-09-07 | 2022-06-14 | 山东联合电力产业发展有限公司 | Power line monitoring terminal system |
| CN112019818A (en) * | 2020-09-07 | 2020-12-01 | 山东联合电力产业发展有限公司 | Power line monitoring terminal system |
| CN112269083A (en) * | 2020-10-20 | 2021-01-26 | 江苏新安电器股份有限公司 | Control panel voltage detection and conversion device for automatic test equipment |
| CN116027194A (en) * | 2023-03-29 | 2023-04-28 | 河北水利电力学院 | Motor fault monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20100901 Termination date: 20171216 |