CN201689147U - Device for monitoring triggering angle of rectifier bridge of thyristor - Google Patents
Device for monitoring triggering angle of rectifier bridge of thyristor Download PDFInfo
- Publication number
- CN201689147U CN201689147U CN201020217698XU CN201020217698U CN201689147U CN 201689147 U CN201689147 U CN 201689147U CN 201020217698X U CN201020217698X U CN 201020217698XU CN 201020217698 U CN201020217698 U CN 201020217698U CN 201689147 U CN201689147 U CN 201689147U
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- rectifier bridge
- trigger angle
- thyristor
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- 238000012544 monitoring process Methods 0.000 title abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims description 15
- 238000012806 monitoring device Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 2
- 238000013024 troubleshooting Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a device for monitoring the triggering angle of a rectifier bridge of a thyristor, relating to monitoring technology of power electronic equipment. The structure of the device is as follows: the output end of a voltage zero-crossing detection circuit (10) at the alternating current (AC) side of the rectifier bridge and that of a current zero-crossing detection circuit (20) at the AC side of the rectifier bridge are respectively connected with the input end of a triggering angle detection device (30); and the output end of the triggering angle detection device (30) is respectively connected with the output end of a display device (40) and that of an alarm device (50). The device can detect and display the triggering angle of the rectifier bridge, provide convenience for monitoring and analyzing the work state of a rectifying device, and can detect the inconductivity of the thyristor caused by various reasons and carry out troubleshooting in time, thereby being applicable to the running monitoring of a high-power rectification power supply and a excitation system of a motor.
Description
Technical field
The utility model relates to a kind of monitoring technology of power electronic equipment, relates in particular to a kind of thyristor rectifier bridge trigger angle monitoring device.
Background technology
Thyristor rectifier bridge is a kind of power electronic equipment of extensive employing.The rectifier bridge fault comprises not conducting of thyristor and two kinds of forms of short circuit, and common transistors breakdown is not conducting of a thyristor form.The reason of conducting failure is not more to cause thyristor, as the thyristor open circuit damage, the synchronizing signal broken string, trigger pulse is lost and be connected in series fuse blows etc.When certain not conducting of thyristor, rectified waveform changes, but rectifier bridge still has output, and fairing still can keep work, so fault is difficult for being found.But when certain not conducting of thyristor, output ripple increases, and the thyristor burden of normally increases, and brings adverse effect can for system and fairing itself.Need not conducting of thyristor phenomenon is detected for this reason, protect so that in time take measures.
What extensively adopt in conventional detection is the trigger pulse loss detection, and this kind method can only reflect synchronizing signal fault and pulse missing fault; Can not be detected faults such as the damage of thyristor open circuit, serial connection fuse blows.For this reason, need the new technical scheme of research, so that the not conducting of thyristor that all reasons are caused all can detect.By retrieval, present domestic this kind monitoring device that still do not have.
Summary of the invention:
The purpose of this utility model is exactly in order to overcome the shortcoming and deficiency that prior art exists, a kind of thyristor rectifier bridge trigger angle monitoring device to be provided, so that detect not conducting failure of thyristor.
The purpose of this utility model is achieved in that
The utility model includes rectifier bridge AC side voltage zero-cross and detects loop, rectifier bridge ac-side current zero passage detection loop, trigger angle pick-up unit, display device and warning device;
The output terminal that rectifier bridge AC side voltage zero-cross detects loop and rectifier bridge ac-side current zero passage detection loop is connected with the input end of trigger angle pick-up unit respectively;
The output terminal of trigger angle pick-up unit is connected with the input end of display device and warning device respectively.
Its principle of work is:
The input end that rectifier bridge AC side voltage zero-cross detects the loop links to each other with the line voltage of rectifier bridge AC side, detect the zero crossing that exchanges side line voltage, the output terminal that rectifier bridge AC side voltage zero-cross detects the loop links to each other with an input end of trigger angle pick-up unit, as the starting point of counting;
The input end in rectifier bridge ac-side current zero passage detection loop links to each other with rectifier bridge ac-side current (rectifier bridge brachium pontis electric current) mutual inductor, detect the zero crossing of ac-side current (or brachium pontis electric current), the output terminal in rectifier bridge ac-side current zero passage detection loop links to each other with another input end of trigger angle pick-up unit, as the terminal point of counting;
The trigger angle pick-up unit calculates the trigger angle of rectifier bridge by counting comparative voltage zero crossing and current zero-crossing point; And judge the whether conducting of corresponding thyristor according to testing result.
An output terminal of trigger angle pick-up unit links to each other with the input end of display device, is used to show the value of the trigger angle of measurement;
An output terminal of trigger angle pick-up unit links to each other with the input end of warning device, sends alerting signal when having detected not conducting of thyristor.
The utlity model has following advantage and good effect:
1, can detect demonstration to the trigger angle of rectifier bridge, be convenient to the duty of fairing is monitored analysis;
2, can the not conducting of thyristor that all kinds of reasons cause in time be detected, so that in time find fault.
3, be applicable to the operational monitoring of big-power rectification power supply and motor excitation system.
Description of drawings:
Fig. 1 is the utility model block diagram;
Fig. 2 is the block diagram of the utility model embodiment.
Wherein:
10-rectifier bridge AC side voltage zero-cross detects the loop;
20-rectifier bridge ac-side current zero passage detection loop;
30-trigger angle pick-up unit;
The 40-display device, 41-display control chip, 42-display;
The 50-warning device, 51-warning light is every, 52-warning contact;
The 60-communicator, the 61-Communication ray is every, 62-communication interface.
Embodiment
Describe in detail below in conjunction with drawings and Examples:
One, overall
As Fig. 1, the utility model comprises that rectifier bridge AC side voltage zero-cross detects loop 10, rectifier bridge ac-side current zero passage detection loop 20, trigger angle pick-up unit 30, display device 40 and warning device 50;
The output terminal that rectifier bridge AC side voltage zero-cross detects loop 10 and rectifier bridge ac-side current zero passage detection loop 20 is connected with the input end of trigger angle pick-up unit 30 respectively;
The output terminal of trigger angle pick-up unit 30 is connected with the input end of display device 40 with warning device 50 respectively.
In addition, but the utility model expanding communication device 60;
The input end of expanding communication device 60 is connected with the output terminal of trigger angle pick-up unit 30.
Two, functional part
1, rectifier bridge AC side voltage zero-cross detects loop 10
As Fig. 2, the three-phase voltage signal that draws self-rectifying bridge AC side detects loop 10 after measuring the mutual inductor isolation at rectifier bridge AC side voltage zero-cross, the shaping circuit that constitutes through operational amplifier is transformed to square-wave signal, deliver to trigger angle pick-up unit 30, be used to measure the phase place of the three-phase alternating voltage amount of rectifier bridge AC side.
2, rectifier bridge ac-side current zero passage detection loop 20
As Fig. 2, the three-phase current signal that draws self-rectifying bridge AC side in rectifier bridge ac-side current zero passage detection loop 20 after measuring mutual inductor and isolating, the shaping circuit that constitutes through operational amplifier is transformed to square-wave signal, deliver to trigger angle pick-up unit 30, be used to measure the phase place of the three-phase alternating current flow of rectifier bridge AC side.
3, the trigger angle pick-up unit 30
As Fig. 2, trigger angle pick-up unit 30 is made of the MSP430F149 single-chip microcomputer.
Deliver to the T0 mouth of single-chip microcomputer from the voltage zero-cross detection signal in rectifier bridge AC side voltage zero-cross detection loop 10, the current over-zero detection signal in rectifier bridge ac-side current zero passage detection loop 20 is delivered to the T1 mouth of single-chip microcomputer, the value that reads internal counter at the rising edge of T0 constantly is N0, the value that reads internal counter at the rising edge of T1 constantly is N1, and then N1-N0 has reflected the size of rectifier bridge trigger angle.
The measured value of trigger angle is shown by the asynchronous serial communication interface UART0 control MAX7219 of MSP430.Can be connected with host computer or communication processor by another asynchronous serial communication interface UART1 simultaneously.
P2.6 and P2.7 by single-chip microcomputer when detecting not conducting of thyristor send alerting signal.
4, display device 40
As Fig. 2, display device 40 is made up of preceding latter linked display control chip 41 and display 42, is used to show the measurement result of trigger angle.
Single-chip microcomputer is presented at measurement result on the display 42 by to the writing of display control chip 41.
5, warning device 50
As Fig. 2, warning device 50 by preceding latter linked warning light every 51 and warning contact 52 form.
When having detected not conducting of thyristor, drive warning contact 52 (relays) by warning light every 51 and move, send alerting signal.
5, communicator 60
As Fig. 2, communicator 60 by preceding latter linked Communication ray every 61 and communication interface 62 form.
MSP430F149 links to each other with communicator 60 by the UART1 mouth, and the result of detection can be by Communication ray after 61, and (as RS485) delivers to other computer system by communication interface 62, realizes remote detection and warning.
Claims (3)
1. thyristor rectifier bridge trigger angle monitoring device is characterized in that:
Include rectifier bridge AC side voltage zero-cross and detect loop (10), rectifier bridge ac-side current zero passage detection loop (20), trigger angle pick-up unit (30), display device (40) and warning device (50);
The output terminal that rectifier bridge AC side voltage zero-cross detects loop (10) and rectifier bridge ac-side current zero passage detection loop (20) is connected with the input end of trigger angle pick-up unit (30) respectively;
The output terminal of trigger angle pick-up unit (30) is connected with the input end of display device (40) with warning device (50) respectively.
2. thyristor rectifier bridge trigger angle monitoring device according to claim 1 is characterized in that:
Expanding communication device (60);
The input end of expanding communication device (60) is connected with the output terminal of trigger angle pick-up unit (30);
Communicator (60) is made up of every (61) and communication interface (62) preceding latter linked Communication ray.
3. thyristor rectifier bridge trigger angle monitoring device according to claim 1 is characterized in that:
Trigger angle pick-up unit (30) is made of the MSP430F149 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020217698XU CN201689147U (en) | 2010-06-01 | 2010-06-01 | Device for monitoring triggering angle of rectifier bridge of thyristor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020217698XU CN201689147U (en) | 2010-06-01 | 2010-06-01 | Device for monitoring triggering angle of rectifier bridge of thyristor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201689147U true CN201689147U (en) | 2010-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020217698XU Expired - Lifetime CN201689147U (en) | 2010-06-01 | 2010-06-01 | Device for monitoring triggering angle of rectifier bridge of thyristor |
Country Status (1)
| Country | Link |
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| CN (1) | CN201689147U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592544A (en) * | 2013-11-21 | 2014-02-19 | 中国第一汽车股份有限公司 | Feedback signal collecting method of power equipment by adopting thyristor as power switch |
| CN106054053A (en) * | 2016-06-15 | 2016-10-26 | 西安科技大学 | Method for fault diagnosis of three-phase full-bridge rectifier circuit thyristor |
| CN106338689A (en) * | 2016-08-26 | 2017-01-18 | 国电南瑞科技股份有限公司 | Self-check method for running state of synchronous motor excitation system |
| CN108132375A (en) * | 2017-12-25 | 2018-06-08 | 天津百利机械装备集团有限公司中央研究院 | A kind of direct current measuring devices and measuring method of band feedforward |
| CN111969871A (en) * | 2020-07-27 | 2020-11-20 | 深圳市汇川技术股份有限公司 | Rectification control method, system, equipment and computer readable storage medium |
-
2010
- 2010-06-01 CN CN201020217698XU patent/CN201689147U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592544A (en) * | 2013-11-21 | 2014-02-19 | 中国第一汽车股份有限公司 | Feedback signal collecting method of power equipment by adopting thyristor as power switch |
| CN106054053A (en) * | 2016-06-15 | 2016-10-26 | 西安科技大学 | Method for fault diagnosis of three-phase full-bridge rectifier circuit thyristor |
| CN106054053B (en) * | 2016-06-15 | 2018-08-24 | 西安科技大学 | A method of it is diagnosed for three-phase bridge rectification circuit transistors breakdown |
| CN106338689A (en) * | 2016-08-26 | 2017-01-18 | 国电南瑞科技股份有限公司 | Self-check method for running state of synchronous motor excitation system |
| CN106338689B (en) * | 2016-08-26 | 2018-11-30 | 国电南瑞科技股份有限公司 | A kind of synchronous motor excitation system operating status self checking method |
| CN108132375A (en) * | 2017-12-25 | 2018-06-08 | 天津百利机械装备集团有限公司中央研究院 | A kind of direct current measuring devices and measuring method of band feedforward |
| CN108132375B (en) * | 2017-12-25 | 2020-03-27 | 天津百利机械装备集团有限公司中央研究院 | Direct current measuring device with feedforward and measuring method |
| CN111969871A (en) * | 2020-07-27 | 2020-11-20 | 深圳市汇川技术股份有限公司 | Rectification control method, system, equipment and computer readable storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: THE ELECTRIC POWER SCIENCE RESEARCH INSTITUTE OF H Free format text: FORMER OWNER: HUBEI PROV. POWER TEST INST. Effective date: 20121023 Owner name: STATE ELECTRIC NET CROP. Effective date: 20121023 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121023 Address after: 430077, 361 East Main Street, Wuchang District, Hubei, Wuhan Patentee after: Hubei Electric Power Research Institute of Power Company Patentee after: State Grid Corporation of China Address before: 430077 Hubei city of Wuhan province Wuchang Xudong Avenue No. 361 Patentee before: Hubei Prov. Power Test Inst. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101229 |
|
| CX01 | Expiry of patent term |