CN1336555A - Thuristor working state detecting method - Google Patents
Thuristor working state detecting method Download PDFInfo
- Publication number
- CN1336555A CN1336555A CN 01127633 CN01127633A CN1336555A CN 1336555 A CN1336555 A CN 1336555A CN 01127633 CN01127633 CN 01127633 CN 01127633 A CN01127633 A CN 01127633A CN 1336555 A CN1336555 A CN 1336555A
- Authority
- CN
- China
- Prior art keywords
- thyristor
- working state
- thyratron transistor
- chip microcomputer
- voltage drop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a detecting method used to check and measure the working state of thyratron transistor. The single-chip microcomputer is used to measure the voltage drop between two ends of thyratron transistor within a period of synchronous signal that is utilized by the thyratron transistor self in the control set. The voltage drop measured represents the working state of the thyratron transistor. The invention makes the measuring to a variety of working state of the thyratron transistor in time realization. It increases the measuring precision and leaves out current transformer and other complicated detection circuit, it can be used in electrical control gear that adopts thyratron transistor.
Description
The present invention relates to a kind of in various thyristor control device conducting, shutoff, operate as normal and the four kinds of status detection methods of fault to thyristor.
For use thyristor as the power control apparatus of switching device can be reliably, effectively operation, must the various duties of thyristor be detected in good time, particularly in the inverse parallel circuit, only under the situation of one group of thyristor reliable turn-off, could open other one group.The developing direction of modern control device is to adopt diagnostic techniques, in good time the fault of diagnostic device.In the thyristor control device, thyristor is main power control member, also is one of main object of fault diagnosis.
The working state detecting method of traditional thyristor is that Current Transformer detects the electric current that thyristor flows through and cooperates certain time-delay to realize.Thyristor becomes shutoff by conducting, differentiates method that whether thyristor turn-off employing and is when electric current is little and just think that thyristor has turn-offed after through the time-delay of certain hour behind certain numerical value.Because electric current really is difficult to judge to zero, and electric current also will experience a release time to zero back thyristor and could really turn-off, and solves so add to delay time with the zero level detecting device.This is a kind of Indirect Detecting Method, and the precision of detection depends on the order of accuarcy of delay selection.It is oversize to delay time, and system response time is slow, and it is too short to delay time, and thyristor does not reliably turn-off and opens another group, causes short circuit.The used element of this method is many, and complex circuit, especially Current Transformer detect electric current, has increased weight, volume and the power consumption of equipment.
The object of the present invention is to provide a kind of method that can in good time detect to the various duties of the thyristor in the thyristor control device.
The objective of the invention is to realize: utilize the synchronizing signal that thyristor itself uses in the thyristor control device by following technical measures, pressure drop to the thyristor two ends in the one-period of this synchronizing signal detects, and reflects the duty of thyristor with the thyristor pressure drop that records.
The pressure drop at described thyristor two ends adopts single-chip microcomputer to detect, and the input end of single-chip microcomputer is connected with the two ends of thyristor through exchanging photoelectrical coupler, and described synchronizing signal is received the interrupting input end of single-chip microcomputer.
According to the volt-ampere characteristic of thyristor, the electric current that only passes through in thyristor could be kept thyristor when living electric current and continues conducting greater than sincere after removing trigger pulse; The electric current that only passes through in thyristor drops to keeps electric current when following, and thyristor could turn-off and recover blocking ability.And when shutoff and conducting state, its tube voltage drop has diverse numerical value, and when two states was changed, its tube voltage drop had tangible saltus step.In view of the above, can detect the duty of thyristor with the method that detects thyristor pipe pressure:
1) when tube voltage drop was the normally voltage (about 1V) of thyristor, thyristor was a conducting state;
2) when tube voltage drop is supply voltage greater than the forward voltage of thyristor, thyristor is a blocking state;
3) when being zero, tube voltage drop shows that this thyristor punctures or external circuit opens circuit.
4) when tube voltage drop be supply voltage, trigger pulse just often, promptly thyristor satisfies turn-on condition and can't normally the time, shows that thyristor is inner to disconnect.
The present invention compared with prior art has following advantage: 1, because the present invention does not detect electric current, the synchronizing signal of utilizing thyristor control device itself to use, the pressure drop that directly detects the thyristor two ends reflects the various duties of thyristor, realized the various duties of thyristor are detected in good time, improved the precision that detects; 2, same owing to not detecting electric current, saved current transformer and other complicated testing circuit, reduced weight, power consumption and the complicacy of entire equipment.
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the functional-block diagram of the concrete embodiment of the present invention;
Fig. 2 is the interrupt service routine process flow diagram of middle single-chip microcomputer embodiment illustrated in fig. 1.
As the functional-block diagram of Fig. 1 for the concrete embodiment of the present invention, main control circuit is received AC motor on three-phase supply a, b, the c by bidirectional thyristor, realizes voltage-regulation or power adjustments to motor by the control to the control utmost point of bidirectional thyristor.The tube voltage drop of bidirectional thyristor is taken out through exchanging photoelectrical coupler and is received the input end of one-chip computer, the circuit of the c phase of only having drawn among the figure, and a, b phase thyristor tube voltage drop testing circuit are mutually identical with C.The model of used bidirectional thyristor is BTA41-400B in the present embodiment, the model of single-chip microcomputer is MC68HC908JL3AP, the model that exchanges photoelectrical coupler is H11AA1, exchange photoelectric coupler output end and be the thuristor working state signal after isolating, every thuristor working state signal of going up is mutually received the input port PTB5 of single-chip microcomputer respectively after photoelectric coupler isolation, PTB6, and PTB7, the supply voltage synchronizing signal is also received input end and computer, can know the residing situation of supply voltage by synchronizing voltage, generally in order to respond the interrupting input end of receiving one-chip computer soon, synchronizing signal is got three-phase or single-phasely can be determined by concrete design.
Actual thuristor working state is measured and is realized by one-chip computer software, is illustrated according to software block diagram shown in Figure 2 (interrupt handling routine) below.Interrupting entry condition is the saltus step of synchronizing signal for the mains voltage waveform zero passage.Can according to the needs of system determine be each intermittent scanning once or several intermittent scanning once; Enter the character that at first will judge load behind the interrupt routine, because the electric current of resistive load and voltage are synchronous, and the electric current of inductive load is wanted load impedance angle of lagging voltage, that is to say positive half way up the mountain at supply voltage, though thyristor has born forward voltage and has applied trigger pulse at the control utmost point again, but because the effect of inductance, the electric current by thyristor does not also have, and at this moment thyristor also is in blocking state.So should determine that sampling instant in each cycle is to guarantee to draw correct conclusion according to load characteristic.Have no progeny in each and each thyristor is sampled according to the sampling instant that obtains, according to the residing state of following rule based judgment thyristor:
1) when tube voltage drop was the normally voltage (about 1V) of thyristor, thyristor was a conducting state;
2) when tube voltage drop is supply voltage greater than the forward voltage of thyristor, thyristor is a blocking state;
3) when being zero, tube voltage drop shows that this thyristor punctures or external circuit opens circuit.
4) when tube voltage drop be supply voltage, trigger pulse just often, promptly thyristor satisfies turn-on condition and can't normally the time, shows that thyristor is inner to disconnect.
If not fault, then will there be off status to deliver in the control system, as the condition of control system.If finding has fault, then system carries out corresponding fault handling.Return for measure the Central Shanxi Plain, back of getting ready next time then.
Claims (2)
1, a kind of detection method of thuristor working state, it is characterized in that: utilize the synchronizing signal that thyristor itself uses in the thyristor control device, pressure drop to the thyristor two ends in the one-period of this synchronizing signal detects, and reflects the duty of thyristor with the thyristor pressure drop that records.
2, the detection method of thuristor working state according to claim 1, it is characterized in that: the pressure drop at described thyristor two ends adopts single-chip microcomputer to detect, the input end of single-chip microcomputer is connected with the two ends of thyristor through exchanging photoelectrical coupler, and described synchronizing signal is received the interrupting input end of single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01127633 CN1336555A (en) | 2001-07-17 | 2001-07-17 | Thuristor working state detecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01127633 CN1336555A (en) | 2001-07-17 | 2001-07-17 | Thuristor working state detecting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1336555A true CN1336555A (en) | 2002-02-20 |
Family
ID=4667566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01127633 Pending CN1336555A (en) | 2001-07-17 | 2001-07-17 | Thuristor working state detecting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1336555A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854055A (en) * | 2010-05-11 | 2010-10-06 | 唐山松下产业机器有限公司 | Thyristor malfunction detection system and method based on singlechip control |
| CN102565662A (en) * | 2012-03-15 | 2012-07-11 | 株洲变流技术国家工程研究中心有限公司 | State detection device for high-potential thyristor |
| CN104181462A (en) * | 2014-09-12 | 2014-12-03 | 中国科学院上海高等研究院 | Measuring circuit for breakover voltage drop of semiconductor switch device |
| CN104730441A (en) * | 2013-12-20 | 2015-06-24 | 中国科学院宁波材料技术与工程研究所 | Thyristor fault detecting device |
| CN108957305A (en) * | 2018-04-28 | 2018-12-07 | 加码技术有限公司 | A kind of controlled silicon detection apparatus and detection method |
| CN113960440A (en) * | 2021-12-21 | 2022-01-21 | 成都麦隆电气有限公司 | Fault detection and protection method for anti-parallel thyristor |
-
2001
- 2001-07-17 CN CN 01127633 patent/CN1336555A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854055A (en) * | 2010-05-11 | 2010-10-06 | 唐山松下产业机器有限公司 | Thyristor malfunction detection system and method based on singlechip control |
| CN101854055B (en) * | 2010-05-11 | 2012-10-10 | 唐山松下产业机器有限公司 | Thyristor malfunction detection system and method based on singlechip control |
| CN102565662A (en) * | 2012-03-15 | 2012-07-11 | 株洲变流技术国家工程研究中心有限公司 | State detection device for high-potential thyristor |
| CN104730441A (en) * | 2013-12-20 | 2015-06-24 | 中国科学院宁波材料技术与工程研究所 | Thyristor fault detecting device |
| CN104730441B (en) * | 2013-12-20 | 2018-07-17 | 中国科学院宁波材料技术与工程研究所 | Transistors breakdown detection device |
| CN104181462A (en) * | 2014-09-12 | 2014-12-03 | 中国科学院上海高等研究院 | Measuring circuit for breakover voltage drop of semiconductor switch device |
| CN104181462B (en) * | 2014-09-12 | 2017-02-01 | 中国科学院上海高等研究院 | Measuring circuit for breakover voltage drop of semiconductor switch device |
| CN108957305A (en) * | 2018-04-28 | 2018-12-07 | 加码技术有限公司 | A kind of controlled silicon detection apparatus and detection method |
| CN113960440A (en) * | 2021-12-21 | 2022-01-21 | 成都麦隆电气有限公司 | Fault detection and protection method for anti-parallel thyristor |
| CN113960440B (en) * | 2021-12-21 | 2022-08-12 | 成都麦隆电气有限公司 | Fault detection and protection method for anti-parallel thyristor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100566068C (en) | Hardware overvoltage breaking-off circuit | |
| CN102023253B (en) | Lightning-proof monitoring warning system | |
| CN101458306A (en) | Breaker operating characteristic test apparatus | |
| CN107703405A (en) | A kind of water purifier power failure detection method | |
| CN104267273B (en) | Quick detection circuit and method for mains fluctuation | |
| CN110333426A (en) | A kind of modular multilevel energy-storage system open-circuit fault diagnostic device and method | |
| CN115112970B (en) | Method and system for monitoring state of outlet pressing plate of relay protection operation loop | |
| CN111965498B (en) | Automatic inspection and fault positioning device for insulation state of hydraulic generator screw | |
| CN108037377A (en) | A kind of method and circuit for detecting three-phase alternating-current supply phase shortage | |
| CN207720046U (en) | The thyristor self-test device of motor soft starter | |
| CN103078332B (en) | Transformer inductive reactive power stepped control method | |
| CN103559801A (en) | Countdown digital display signal lamp fault detection system simultaneously driven by multiple loads | |
| CN106199225A (en) | Lack detection circuit | |
| CN201819947U (en) | Lightning protection monitoring and alarming system | |
| CN1336555A (en) | Thuristor working state detecting method | |
| CN103163409B (en) | Anti-bearing calibration and device is connect for the wiring of on-the-spot electric instrument electric current | |
| CN107632198B (en) | Dual-power electric quantity acquisition device and application method thereof | |
| CN109443573A (en) | A kind of power tube kernel system for detecting temperature and method | |
| CN203838302U (en) | Fault detection system for charge-discharge circuit | |
| CN201075665Y (en) | Protection test control apparatus having functions of alternating-current/direct-current general use and checking the same term | |
| CN104777436A (en) | Novel alternating current power supply monitoring device | |
| CN202127233U (en) | Power grid fault measuring and controlling device | |
| CN111552682A (en) | Expert model base-based electricity stealing type diagnosis method | |
| CN201359629Y (en) | Direct-current power supply grounding alarm device | |
| CN202502131U (en) | Voltage/current detecting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |